Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 1 of 29
Reference number: 201302255
PRE-QUALIFICATION Pre-qualification for the Contract for Conventional Driving of Tunnels in the Ekebergåsen, Follo Line Project
The Norwegian National Rail Administration, Infrastructure Construction unit (herein also referred to as Company) has commenced a procurement process with the intention to invite tenders for a contract for conventional driving of tunnels in the Ekebergåsen (Ekeberg Hill), where the tunnels meet close to the Oslo Central Station, as part of the Follo Line Project.
The competition will be performed as a two-step process as follows:
Pre-qualification - Issue of pre-qualification documents - Receipt and evaluation of tenderers’ replies to the pre-qualification Invitation to tender - Issue of invitation to tender to the qualified tenderers - Receipt and evaluation of tenders and negotiations with one or more tenderers - Contract award
Questions to the pre-qualification documents must be submitted no later than one week prior to the delivery due date at stated in section 2.8 hereto.
Questions regarding this pre-qualification process shall be sent on e-mail to:
Norwegian National Rail Administration, attention: Merete Norli, e-mail: [email protected].
Norwegian National Rail Administration
Erik Smith
Project director
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Reference number: 201302255
Contents: 1. INTRODUCTION...... 3 1.1 GENERAL INFORMATION ABOUT THE PROJECT ...... 3 1.2 INFORMATION ABOUT THIS CONTRACT ...... 3 1.2.1 Scope of work description ...... 3 1.2.2 Options ...... 6 1.2.3 Main Quantities ...... 6 1.2.4 Interface with other project activities ...... 6 1.2.5 Compensation ...... 6 1.2.6 Tentative schedule ...... 7 1.3 COMPANY’S ORGANISATION ...... 7 2. INFORMATION ABOUT THE PRE-QUALIFICATION PROCESS ...... 8 2.1 PROCEDURE ...... 8 2.2 CONTRACT NOTICE ...... 8 2.3 RELEVANT REGULATIONS ...... 8 2.4 THE CANDIDATE`S EXPENSES IN CONNECTION WITH THE COMPETITION ...... 8 2.5 LANGUAGE REQUIREMENTS ...... 8 2.6 PLACE OF DELIVERY ...... 8 2.7 METHOD OF DELIVERY ...... 8 2.8 REPLY DUE DATE ...... 9 2.9 RESERVATIONS CONCERNING CANCELLATION OF THE COMPETITION ...... 9 2.10 DEADLINE FOR APPLICATION FOR INTERIM INJUNCTION ...... 9 3. SELECTION CRITERIA ...... 9 4. INFORMATION REQUIRED FROM THE CANDIDATE ...... 9 4.1 FORMAT ...... 9 4.2 RELIANCE ON THE CAPACITIES OF OTHER ENTITIES ...... 9 4.3 SELECTION CRITERIA ...... 10 5. ATTACHMENTS ...... 13
APPENDIX 1
Brief Technical Description of Contract Works (preliminary to give the prequalification candidates an impression of the Contract work)
Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 3 of 29
Reference number: 201302255
1. Introduction
1.1 General information about the project The 22 km long Follo Line Project includes a new double track line between Oslo Central Station and the public transport hub at Ski. The project includes a 19.5 km railway tunnel (twin bore), extensive works at Oslo Central Station, construction of a new station at Ski and necessary realignment of the existing Østfold Line (on the approach to Oslo Central Station with a new tunnel and between the new Ski station and the tunnel). The Follo Line will be built for speed up to 250 km/hr.
The Follo Line Project is split into four EPC contracts: Contract for work in connection with the Oslo Central Station (Oslo S) Contract for TBM driving of the twin Follo Line tunnels Contract for conventional driving of tunnels in Ekebergåsen (the Ekeberg Hill). Contract for the new Ski Station and the surface section from Ski to Langhus.
The scheduled start of construction for the project is mid 2014 and completion is scheduled in 2020. Preparatory works at Oslo Central Station and close to Ski Station and preparation of rig areas and access tunnels at Åsland (about midway between Oslo Central Station and Ski Station), and in Klypen (close to Oslo Central Station) is scheduled to commence in 2013.
In the following description “the Company” shall mean the Norwegian Railroad Authority/Follo Line Project, and “the Contract” shall mean the contract for which this Prequalification Questionnaire applies.
Further information about the project is available here: http://www.jernbaneverket.no/en/startpage1/Projects/New-double-track-Oslo-Ski/
1.2 Information about this contract
1.2.1 Scope of work description The Contract comprises all conventional tunnels driving scope (Drill & Blast) in the Follo Line Project, i.e. the Inbound Østfold Line (IØL), inner part of the twin Follo Line tunnels, a number of crossings with existing tunnels and roads and the 3-Track tunnel at the interface with the EPC contract for modification work at the Oslo S Station. The preliminary technical scope of work is described in more detail in Appendix 1 hereto. The main design data for the tunnels are;
Line Train Speed Net sectional Area Inside Lining Track Type (km/hr) (m2)
FB 250 52 Cast in-situ concrete Slab Track lining as water and frost protection.
IØL 130 54 Same as FB Ballast Track
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Reference number: 201302255
3-Track Tunnel
Bækkelaget rig area & access tunnel
Access tunnels &Rig area Sjursøya Fig. 1 Overview of the project area of the Contract.
BASE CASE SCOPE OF WORK:
The work will start with establishment of the access tunnels, including a reloading station, to the IØL main tunnel (shown in green in Fig.2) and preparation of the rig area, i.e; o Two access tunnels from the Sjursøya tunnel to the alignment of the main IØL Tunnel. o One reloading station. o About 30 m of the main IØL Tunnel to each side of the access tunnels and reloading station, altogether 150m. o Prepare the rig area at Oslo Harbour‟s property, including hook-up of utilities for use in the preparatory work and later for the main contract work. The 3-Track Tunnel from km. 1.630 to 1.770 (140 m) , routing the 3 new tunnel lines of the project into a similar size concrete culvert at „Klypen‟, being part of the Oslo S Contract. Excavated material to be taken out at the Oslo S side. The new Inbound Østfold Line (IØL) Tunnel from the 3-track tunnel at km 1.715 (IØL ref. system) to km. 2.915 (length about 1.200 m), exiting to the south at a crossing with the main southbound road E18 out of Oslo. The D&B part of the Follo Line Twin Tunnels from the 3-track tunnel to km. 2.300, where it meets the two northbound TBM‟s . Length is about 530m. Major crossings of the 3 new tunnels, representing some of the main challenges of the Follo Line Project. These crossings are; o Crossing just underneath the existing road tunnels in the Ekeberg Hill, see principle sketch below. o As part of the road tunnels crossing, change the routing of the existing Alna River Tunnel, now located between the road tunnels and the new tunnels, see sketch below. o Crossing of the IØL Tunnel under the main southbound road out of Oslo (E18). Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 5 of 29
Reference number: 201302255
o Crossing of two product tunnels and one evacuation tunnel connecting existing oil storage caverns in the Ekeberg Hill with outlet at Oslo Harbour, Sørenga.
These crossings are described in more detail in Appendix 1.
The conceptual solutions for the crossing of the existing road tunnels, including the changed routing of the Alna River and the E18 road is subject to approval by the Norwegian Road Authority and the Norwegian Watercourses and Power Authority. The Company will secure such approvals prior to the issue of the invitation to tender (ITT) for the Contract. This means the technical and execution concept for these crossings will remain fairly fixed in the ITT, with little room for concept changes by the EPC contractor. It further means that the technical details will be more extensive than what is normal in an ITT package for an EPC contract.
Fig. 2 The extent of the Base Case shown in Blue. Preparatory Works in green. The Sjursøya tunnel in red.
Existing Road Tunnels Existing Alna River Tunnel Change of routing of the Alna River
Follo Line Tunnels
The Incoming Østfold Line Tunnel
Fig. 3 The complex crossing of the new tunnels (in red) with the existing road tunnels (in grey) and the Alna river (in green). Access tunnels in yellow.
Note : The Inbound Østfold Line (IØL) must be completed for traffic by June, 2018, and this work represents the critical timeline in the Contract. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 6 of 29
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The Contract will not include any EPC work for Railway Technology (RT) in the tunnels, such as lying of tracks, the overhead contact line, signalling, power supply and Telecom. The RT EPC work for the IØL will be included in the EPC contract for the Oslo S modification work, while the RT EPC work for the drill and blast part of the Follo Line twin tunnels will be included in the TBM EPC contract for these tunnels. The present Contract will only include construction work of e.g. cable ducts, foundation for signal posts as engineered by the above contracts.
Deposit areas for the tunnel excavation materials under the present Contract will be secured by the Company prior to the award of the present Contract. This includes obtaining the approval of the regulation plans by the various municipalities affected by the location of the deposit areas. It is not yet decided whether to take the excavated material by road or sea to the deposit areas.
It should be noted that some of the tender documents will be submitted in Norwegian, that some of the project documentation will be required to be submitted in Norwegian and that certain project personnel must be able to communicate in Norwegian for safety reasons.
1.2.2 Options
An OPTIONAL CASE is defined as stopping the TBMs at km. 2.285 instead of at km 2.300 as in the Base Case described in 1.2.1, which means an extra 2x 530 m of conventional driving of the Follo Line twin tunnels.
1.2.3 Main Quantities
The main preliminary Bill of Quantities are found in Appendix 1,
Section 4 Preliminary Bill of Quantities – BASE CASE
Section 6 Preliminary Bill of Quantities – OPTIONAL CASE
1.2.4 Interface with other project activities
The following contractual interfaces are; 1. Against the Oslo S Modification EPC Contract at entry of the 3-track tunnel at km. 1.630. 2. Against the TBM Follo Line Twin Tunnels EPC Contract at km 2.300 for the Base Case and at km 2.285 for the Optional Case.
As already described there are two important interfaces for Railway Technology (RT), in that the EPC scope of work for RT in the IØL tunnel is under the Oslo S Modification EPC Contract, and the same for the Follo Line twin tunnels is under the TBM Follo Line Twin Tunnels EPC Contract.
The present Contact will therefore only include construction work of e.g. cable ducts, foundations for signal posts etc., as engineered by the above contracts.
1.2.5 Compensation
The Contract will be an Engineering, Procurement and Construction (EPC) contract based on the NTK 07 model. The ITT will be based on a functional specification (mandatory requirements) and a Front End Engineering Design (FEED). The EPC contractor is assumed in his tender to take ownership to Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 7 of 29
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the FEED and develop this into a detailed design for procurement of materials and equipment and construction.
The EPC Contractor shall feel free to modify, within the limits of the basic concept, the FEED to suit his most cost efficient construction methods. As already mentioned, some extra restrictions on this freedom exist for the conceptual solutions of the crossing of the new tunnels with the Ekeberg Hill Road Tunnels and with the main E18 Road.
The Price Format will in general be a fixed unit rate scheme with provisional quantities given the ITT, subject to measurement during work execution. Some elements will be requested priced as lump sums, such as Preliminaries and Engineering.
1.2.6 Tentative schedule
Pre-qualification reply due date 2013-06-19 12.00hrs
Notification to Candidates of Prequalified 2013-09-02 Tenderers
Issue of the invitation to tender 2013-10-01
Deadline for submission of Tenders 2014-01-31
Evaluation period of received Tenders 2014-02-01 – 2014-03-31
Negotiations 2014-04-01 – 2014-05-31
Contract award 2014-07-01
Contract completion date End of September, 2017 for all work.
Note: The IØL tunnel and the associated part of the 3-track tunnel shall be completed under the Contract by mid September, 2017. Another 8-9 months are allowed for completion of Railway Technology (by other contracts) to ensure the line is ready for traffic in June, 2018.
This schedule is tentative and the Company reserves the right to revise the schedule dates.
1.3 Company’s organisation The Norwegian National Rail Administration has a separate unit for Infrastructure Construction projects headed by a director representing the owner of the Follo Line Project. The Follo Line Project is headed by a project director reporting to a steering committee. The project director has a project organization with project managers for each of the EPC contracts. The project managers are responsible from the early project development until the final hand-over to the owner. This contract will be handled by the project manager for the Tunnel D&B sub-project,
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All communication from the candidate shall be directed to the contact person for this pre-qualification, ref. the invitation to pre-qualification letter.
2. Information about the pre-qualification process
2.1 Procedure The competition shall be conducted in a two-step procedure with negotiations. A limited number of tenderers will be selected for bidders list, ref. Section 3 below.
2.2 Contract notice The procurement is announced in DOFFIN and in TED.
2.3 Relevant regulations This procurement shall be subject to Norwegian law and to the special provisions set forth in these pre-qualification documents.
More specifically: The procurement is regulated by the Norwegian Public Procurement Act of 16 July 1999 no. 69, and by the Regulations on Public Procurement of 7 April 2006 no. 402 (Procurement Regulations).
Pursuant to § 23 of the Norwegian Act relating to Public Access to Documents in the Public Administration of 19 May 2006 no. 16 (Freedom of Information Act), tenders and tender protocols are exempt from publication until the tenderer has been chosen. Company is under a duty to keep confidential any company secrets in the tenders, ref. Procurement Regulations § 3-6. Company will therefore, as a main rule, exempt from publication tenderers prices and solutions provided in the tender or otherwise in connection with the tender process.
Tenderers are not entitled to engage in cooperation in violation of the provisions of the Norwegian Act of 5 March 2004 no. 12 (The Competition Act).
2.4 The candidate`s expenses in connection with the competition All candidate‟s expenses associated with participation in the pre-qualification and, if relevant, the competition shall be borne by the candidate.
2.5 Language requirements The documentation of qualifications shall be submitted in English unless otherwise stated in the selection criteria below.
2.6 Place of delivery The reply to the pre-qualification shall be delivered to:
Name: The Norwegian National Rail Administration (Jernbaneverket) Address: Stenersgata 1d, 0050 Oslo, Norway. Attn: Merete Norli, the Follo Line Project, Tunnel D&B
2.7 Method of delivery The reply to the pre-qualification must be in writing and shall be delivered to the address specified in section 2.6. Please notice that written submissions shall be marked "Pre-qualification: Contract for Conventional Driving of Tunnels in the Ekebergåsen”. The documentation shall be submitted in 3copies, and on a USB memory stick. In the event of any deviation between the written and electronic versions, the written version shall take precedence. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 9 of 29
Reference number: 201302255
The documentation of qualifications shall not be delivered by e-mail or fax.
2.8 Reply due date The reply to the pre-qualification shall be received at the place of delivery, ref. section 2.6, within 19- June, 2013 at 12:00 hours (noon).
2.9 Reservations concerning cancellation of the competition The competition can be cancelled with immediate effect if required appropriations or required governmental approvals are missing. No claim can be raised against Company due to such cancellation.
2.10 Deadline for application for interim injunction The deadline for applying for an interim injunction against the decision to:
• refuse a request to participate in the competition because of conditions at the supplier or • reject a request to participate in the competition when it is a limit on the number of participants,
is 15 calendar days from the day after Company‟s notice of refusal or rejection of the request to participate has been sent.
3. Selection criteria Company will, based on the information submitted in this pre-qualification process, qualify the tenderers that will receive the invitation to tender documents.
The candidate shall provide all information as required under Section 4 below.
Company will limit the number of qualified candidates to minimum 3 and maximum 5. If less than 3 of the candidates are found qualified, Company may decide either to continue or to stop the process. The best qualified candidates will be selected based on the selection criteria stated in the table in Section 4.
The stated minimum requirements are mandatory in order to pre-qualify. Where a percentage is stated in the column “Weighting”, the candidate‟s reply will, if it meets the minimum requirements, be given a score from 1 to 10 based on an evaluation of to what extent the candidate‟s reply satisfies the relevant criteria. Score 5 will be given to the most satisfactory replies, while score 1 indicates that a reply satisfies the minimum criteria only.
The scores will be weighted in accordance with the given weighting and the candidates with the highest scores will be selected for the bidders list.
4. Information required from the candidate
4.1 Format The candidate‟s reply must consist of a signed letter and the documentation listed below. The candidate‟s reply shall be structured in accordance with the numbering in the tables below.
4.2 Reliance on the capacities of other entities With regard to criteria no. 7 to 10 in Section 4, candidate may rely on the capacities of other entities, regardless of the legal nature of the links between them. Candidate shall in that case prove to Company that it will have at its disposal the resources necessary. In the case of the criteria related to Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 10 of 29
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financial standing, candidate may only rely on other entities if they are to be jointly liable towards the Norwegian National Rail Administration for the execution of the contract.
Under the same conditions as above, a group of contractors may rely on the capacities of participants in the group or of other entities.
4.3 Selection criteria
No. Detail criteria Minimum Requirements
1 Information about the candidate Requested information received
Documentation requirements: Certificate of incorporation Both postal and visiting address Contact person‟s name. telephone no. and e-mail address Organization chart Description of ownership
If the candidate is a group of contractors the relationship between the involved parties shall be described and documented. Certificate of incorporation may also be submitted in Norwegian, Swedish or Danish. 2 Information about the candidate‟s ultimate Requested information received parent company Documentation requirements: Certificate of incorporation Both postal and visiting address Contact person‟s name. telephone no. and e-mail address Description of ownership
If the candidate is a group of contractors the information in this section shall be provided for each of the partners in the group. 3 Tax and VAT statement Taxes and VAT are confirmed paid
Documentation requirements: Tax and VAT certificates (Norwegian Tax Administration‟s form RF-1244) for respectively tax and VAT, maximum 6 months old (calculated from the reply due date for pre-qualification). These certificates may also be submitted in Norwegian.
Non-Norwegian candidates shall provide similar certificates from the Authorities in their country of registration. These certificates may also be submitted in Swedish, Danish or English. 4 HSE declaration Completed declaration Documentation requirements: The attached declaration STY-602603 Self-declaration on health, environment and safety (HES) shall be completed and signed by the candidate.
5 Good business ethics No Reason for rejection related to the public procurement regulation, sections 20-12 (1) letter e) and (2) letters c) and d) Documentation requirements: There shall be no transgressions against the circumstances mentioned in FOA § § 20-12 in the last five years, which is likely to affect the fulfilment of contractual obligations. The attached declaration STY-602262 Self- declaration on anti-corruption, etc. shall be completed and signed by the candidate. The candidate shall disclose relevant information if the business, managers in the business or majority owners of the business over the last five years is legally convicted or is guilty of: - Corruption, - Fraud, - Money laundering - Matters relating to the professional conduct - Serious negligence against professional and ethical standards in the industry concerned - Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 11 of 29
Reference number: 201302255
No. Detail criteria Minimum Requirements
6 Corporate Social Responsibility The candidate shall sign the attached Declaration of Corporate Social Responsibility, where the following points in the declaration shall be answered positive, Sections 6.1, 6.2, 6.9, 6.10 and 6.15 Documentation requirement: Signed Declaration of Corporate Social Responsibility 7 Financial statements The candidate shall have strong financial capability The candidate must demonstrate compliance with the minimum criteria below, - The weighted average annual turnover of the candidate in the Fiscal Years (as defined hereunder) 2009, 2010 and 2011 was at least 700,000,000 NOK. - Documentation requirements: Financial statements for the last 3 years for the candidate. Such financial statements shall be audited by an internationally well-reputed auditor. Information about major developments in the candidate‟s economy after the last available financial statements. Details regarding the credit rating of the candidate - Credit rating conducted by the institution in the supplier's country (public) approved for the exercise of such activities. Contact person regarding financial information (name, telephone no. and e-mail address).
Management Systems and Accreditation – Weighting 15% 8 Quality System in accordance with EN ISO 9001:2008 or Score 1-10 equivalent Documentation requirements:
Please provide: Documented statements of quality policy and quality objectives Quality manual ISO certificate, if the candidate is certified according to EN ISO 9001:2008 (or equivalent). 9 Safety Average H1 value <8 over the three last years. H1 Score 1-10 is defined as no. of lost time incidents per million man-hours.
If the H1 value is 8 or higher, the Candidate shall document the development of the H1 value. The candidate shall also state any introduced improvements and present documentation that can prove the effects of the improvements. The Candidate can, based on an overall evaluation of the given information, be considered qualified.
If the candidate is a group of contractors the same information shall be provided for all parties Documentation requirements: Provide a brief description of their Safety Management System and its overall Management structure. Also provide safety statistics from Construction activities during the last 3 years including the average H1 value. 10 Environment System in accordance with ISO 14001 or Score 1-10 equivalent Documentation requirements: Provide the candidate‟s environment management system
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Reference number: 201302255
Project Delivery Experience – Weighting 50% 11 Project value - completed within the last One Infrastructure Project Contract value with Score 1-10 5 years min. amount 100 Mio €) Documentation requirements: Provide evidence of experience as principal contractor in one Infrastructure Project Contract with value min. amount 100 Mio €) 12 Conventional Tunneling requirement- One project involving excavation in hard rock of Score 1-10 completed within the last 5 years underground cavern Documentation requirements: - 15 km of tunnels with primary support of sprayed concrete and bolts. - At least one project involving excavation in hard rock of underground cavern with min cross sectional area 150 m2 . 13 Technical Experience One tunnel project in urban areas with water Score 1-10 ingress control Documentation requirements: Candidates are requested to provide further information on their experiences in the following areas. This should include a brief description of any specific problems encountered or challenges overcome. - Tunneling in urban areas. The project will be constructed in urban areas with numerous buildings and sensitive structures. Candidates are requested to provide details of previous experiences tunneling in such an environment. - Water ingress control Considerable Pre- grouting will be required at critical areas for the control of water ingress. This pre grouting will be necessary during tunnel driving. Candidates are requested to provide details of any experience they have in such activities.
Human Resource for Key Positions – Weighting 20% Provide details as to the currently available „in house‟ human resources. This should be provided in the form of a histogram, highlighting all disciplines vs current numbers of staff. Particular reference is made to the numbers of staff available who qualify for the following „key roles’.
The candidate shall not specify which persons will be provided. No CV shall be submitted at this stage.
14 Projects Manager Score 1-10 Documentation requirements:
- 15 years‟ experience directly involved in the construction of major infrastructure projects. - having managed an EPC/Design and Build contract of at least 100 Mio € - at least one D&B tunneling project as Project Manager 15 Tunnel Manager conventional tunneling. Score 1-10 Documentation requirements: - At least 10 years‟ experience in Drill and Blast tunneling, with 5 years being in senior position. - at least one Project in Drill and Blast tunneling with min. diameter of 8 m. - Experience in pre grouting in hard rock conditions. 16 Planning/LogisticsManager Score 1-10 Documentation requirements: - 10 years‟ experience in planning/scheduling major infrastructure projects. - At least one Tunnelling Project in a Senior position.
Current and Projected Workload – Weighting 15% 17 Current and Projected Workload Score 1-10 Documentation requirements: - Each candidate is required to provide details in the form of a histogram highlighting their current and projected workload. This should take into account the Follo Line and the projection shall be until end of 2015. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 13 of 29
Reference number: 201302255
5. Attachments
A1 - Self-declaration on Health-Environment-Safety A2 - Declaration of Corporate Social Responsibility A3 - Self-declaration on anti-corruption
APPENDIX 1
Brief Technical Description of Contract Works (preliminary to give the prequalification candidates an impression of the Contract work)
Contents: 1. Overview of geological conditions
2. Hydrogeological overview
3. Technical description – Base Case
4. Preliminary bill of quantities – Base case
5. Technical description – Optional Case
6. Preliminary bill of quantities – Optional Case
1. Overview of Geological Conditions
The project area consists predominantly of Precambrian gneiss (primarily tonalitic to granitic gneiss) with intrusions from Perm time and amphibolite dykes/sills. The dominant rock formation strikes N–S to NW–SE. In the southern part (towards Ski), the orientation of the structure changes into E–W.
According to the geological data, two main joint directions exist along the entire tunnel alignment: One joint set is steeply dipping, has a roughly E–W oriented strike and a joint spacing of about 0.8–0.9 m. In the southern part of the project area, a joint spacing as dense as 0.05 m has been observed. The second joint set follows the foliation, which is mainly orientated N–S and dipping westwards (35–90°) with a joint spacing of 0.5–1.1m. In the northern part, the joints are smooth to rough, while in the southern part the joints are planar to undulating. Locally the rock mass appear as massive with joint spacing of 2-3m.
A number of weakness zones are recorded. Zones will appear both sub-parallel and nearly perpendicular to the tunnel alignment. The main weakness zone in the project area is expected to be encountered in the northern part of the tunnel, where the Ekeberg fault (a main fault between Cambro-Silurian sedimentary rocks and Precambrian rocks) is crossed. This fault will be crossed with a tunnel span of 25-30 m (three track tunnel for both FB and IØB).
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2. Hydrogeological Overview
In the basement rock, ground water is mostly restricted to fissures and fault zones. As already mentioned above, the amphibolite dykes/sills present a higher joint density and are usually encountered with water ingress.
The maximum ground water level (at an altitude of about 130 m.a.s.l. and, therefore, 125 m above the tunnel level) is located in the area of Ekeberg plateu.
The hydraulic conductivity is generally low and depends on the fracture pattern and the degree of fracturing. The hydraulic conductivity is calculated based on Lugeon tests. During testing for Follobanen Tunnel, a maximum hydraulic conductivity of 1.0 x 10-5 m/s has been measured. Data concerning the expected water inflow into the tunnel is not available
Area sensitivity classification and leakage handling Sensitivity classification along the tunnel alignment for the tunnel project is given in Table 1. In table Table 2 planned grouting schemes for the given sensitivity classes is listed.
Table 1: Sensitivity classification along the tunnel alignment Km Location Area Comments classification of pore pressure sensitivity
The area is partly drained already by existing From the northern portal and caverns and tunnels 1.63 -2.3 Small sensitivity under northern part of Ekeberg Water proof lining at the portal and when passing under the Alna river.
2.3 – 4.0 Small sensitivity Existing caverns and Below Ekeberg to Holtet (option) tunnels in the area
4.0-4.4 Moderate Holtet (option) sensitivity
Grouting strategy and leakage limits The purpose of grouting in tunneling construction is as follows: - To avoid unacceptable damage on nature - To avoid unacceptable damage on buildings and other infrastructure, e.g leakage reduced ground water level settlements. - Meet the construction requirements for the tunnel Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 15 of 29
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Grouting strategy is based on pre-excavation grouting. If the pre-excavation grouting is unsuccessful, post-excavation grouting may be an alternative. Overlap between systematic pre-excavation fans is specified in Table 2. Probe holes may show that secondary grouting rounds will be required. The Norwegian National Rail Administration (NNRA) will carry out pore pressure monitoring and settlement measurements along the tunnel alignments.
Table 2: Key data for grouting schemes and corresponding pore pressure sensitivity Grouting methodology Area classification of pore pressure sensitivity
Small sensitivity Moderate sensitivity Sensitive
Probe holes Systematic, 4 holes NO NO Distance of 3 blasting rounds, approximately 15m
Systematic pre grouting Sporadic YES YES
Perimeter c/c between 1,2m when required 1,2m 0,7m grouting holes
Number of holes in 4 4 6 tunnel face
Length of holes 21-24m 21-24m 21-24m
Tunnel length between 4 blasting rounds, 4 blasting rounds, 3 blasting rounds, grouting fronts approximately 20m approximately 20m approximately 15m
Overlap between None 3-4m 8m grouting fans/sections
Main grouting material Standard grouting Standard grouting Standard grouting cement cement cement
Secondary grouting Micro fine grouting Micro fine grouting Micro fine grouting material cement cement cement
Main additive Micro silica Micro silica Micro silica
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3. Technical Description – Base Case
General excavation works For general excavation works conceptual drawings of plan, profile and sections and a brief description of design requirements will be provided by the Company. Pre-grouting ; see previous principle. Excavation In order to reduce the concrete consumed in the fully cast lining there will be requirements in connection with careful blasting and incentives related to the resulting tunnel outline. Rock support The lining does not constitute any sort of rock support, rock support shall be provided by rock bolts and shotcrete. Spiling and shotcrete arches may be utilized where rock conditions are worse. Rock conditions are described in the discipline report for hydrogeology. Water and frost protection The water and frost protection shall have a design life of 100 years, favouring a solution with fully cast lining. The proposed design consists of a cast in situ unreinforced concrete slab of minimum 300mm thickness. The lining is not designed to carry any water pressure and there must be a drainage layer between the membrane and the shotcrete. The water ingress control will be secured by pre-grouting. The membrane shall make the tunnel drip free.
Three track tunnel For fire safety and smoke diversion the tracks in the three track tunnel will be separated by concrete walls (not load bearing).
Water/drainage/manholes/Cable ducting routes Cable ducting routes will consist of a combination of cast in tubes and cable ducts, on both sides of the track. The cable ducts will be located near to the tunnel walls/arcs. This ensures easier access to ducting routes for later installation of equipment. Main pipe crossings with manholes are constructed at each cross passage. In the cross passages conduits are embedded as cable ducts and manholes. Pipeline for fire water is to be embedded in the track foundation.
Rig area
The rig area for Base case is located at Sjursøya harbour. This is a very limited area with no space for housing facilities. The rig area at the harbour will have been previously used by the contractor for the preparatory works, and some key tunnel features, such as ventilation and water pumps will still be in operation. The rig area is accessible from E18 southbound from Oslo. Current access is via a ramp, this will be closed in late 2014 and a new access will be completed by October 2015. In the meantime access will be through the Grønlia tunnel and harbour road. Access to the tunnel face is through the access tunnels excavated from the existing traffic tunnel from the harbour. Until the 9th of October the Sjursøytunnel will be open to public Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 17 of 29
Reference number: 201302255
traffic. Transportation of masses from the tunnel face is subject to restrictions from several third parties (Road authorities, harbour authorities. etc).
The rig area at Sjursøya. For full detail see drawing: UOS-30-X-13801_00B
Access tunnel
The currently planned access the Follo Line alignment is an extension of the IØL access tunnel. This is approximately 240 m of tunnel that shall pass over the IØL alignment and meet the Follo Line at profile 2.200. The access tunnel is designed with a 50m2 cross section. This routing may be moved closer to crossing with the road tunnels prior to the invitation to tender. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 18 of 29
Reference number: 201302255
Cross section of access tunnel from Sjursøya. For full detail see drawing: UOS-30-F- 13501_00B
Reloading station
There will already be established one reloading station in the IØL access tunnel. A second reloading station will be needed when the Follo Line access tunnel is established.
Inbound Østfoldbane
The tunnel is designed with a net free area of approximately 54 m2. The tunnel is designed with a ballasted track.
Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 19 of 29
Reference number: 201302255
Cross section of IØL. For full detail see drawing: UOS-30-F-14009_00C
Follo Line Twin Tunnels
The tunnel is designed with a net free area of approximately 52 m2. The tunnel is designed with a slab track.
Cross section of the Follo Line tunnel. Full details on dwg. UFB-30-F-30002- +01B
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Reference number: 201302255
Three track tunnel
The detailed master plan shows the three track tunnel with a slab track, but the tunnel is most likely to be finally designed with a ballasted track.
Cross section of three track tunnel. For full detail see drawing: UFB-30-F-30015_01B
TBM Disassembly chamber
At the southern end of the D&B excavated Follo Line twin tunnels (Base Case at km 2.300) there must be established disassembly chambers for the TBMs. When the TBMs arrive they will be disassembled in these chambers and brought out via Oslo S.
Crossing underneath Alna tunnel
Both IØL and the Follo Line tunnels will be crossing underneath the Alna river tunnel as close as possible. As a consequence the railroad tunnels will puncture the Alna river tunnel, this requires a re-routing of the Alna river. The current solution consists of access tunnels and a new water tunnel, including 4-5 pieces of 75 m long bored holes underneath the trafficked Ekeberg tunnels.
An extensive description of the proposed Alna river re-routing is described in UFB-30-A- 32547_02B.
All work in this area must be approved by Norwegian Road Authority prior to issue of the invitation to tender. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 21 of 29
Reference number: 201302255
Existing Alna river in blue, re-routed Alna river in pink. From report: UFB-30-A-32547_02B
Cross section of Alna river re-routing. From report: UFB-30-A-32547_02B
Water proof culverts must be constructed in the Alna river tunnel where it crosses the railroad tunnels. During construction, measures must be taken to secure the railroad tunnels from any water leakage.
Detailed design solution will be provided by the Company.
Crossing underneath the existing Ekeberg road tunnels Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 22 of 29
Reference number: 201302255
Both IØL and the Follo Line tunnels will be crossing underneath the Ekeberg road tunnels with an overburden of as little as 2,6 meters. Several designs for alternative rock support to ensure the safety in both tunnel tubes have been developed. The current chosen design utilizes spiling pipes and casting of the tunnel outline.
Current concept for crossing of the Ekeberg tunnel. From report: UFB-30-A-32563_02B
In addition to the extra measures taken with the excavation of the IØL and Follo Line tunnels there will also be a need to improve the overall load bearing capacity in the existing Ekeberg road tunnels. The suggested solution is to fill the void between the concrete elements and rock wall with concrete in the critical areas.
Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 23 of 29
Reference number: 201302255
Suggested extent of concreting behind tunnel elements. From report: UFB-30-A-32563_02B
The preferred excavation method and safety measures are described in UFB-30-A- 32563_02B.
All work in this area must be approved by the Norwegian Road Authority prior to the issue of the invitation to tender.
Pumping station and technical rooms
A pumping station shall be constructed as a part of the access tunnels to the Alna re-routing.
The current plan describes three technical rooms for IØL and three cross passages for the Follo Line section included in Base case. The cross passages shall serve as technical rooms and escape route from one tube to the other. In connection with each technical room there will be several manholes for high and low voltage cables, signal and water/drainage. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 24 of 29
Reference number: 201302255
Cross section of cross passage. For full detail see drawing: UFB-30-F-30061_01B
Crossing of oil export piping tunnels in the Ekeberg Hill
The southern 250 m of the IØL crosses close to product piping route tunnels from two oil storage caverns delivering jet fuel, petrol and diesel. The current alignment of IØL passes the product tunnels with as little as 5 meters overburden, and special measures must be taken when crossing the tunnels.
Tunnel portal
The tunnel entrance for IØL inbound at Sydhavna will be built as a concrete structure integrated in an existing bridge construction for E18 Mosseveien. The intersection between the rock tunnel and the portal construction will be approximately 15-20 meter from the portal. This means that the portal structure has to be built under E18. The diversion of Østfoldbanen inbound will be in conflict with an existing ventilation tower for a rock cavern storage called Ekeberghallene. The ventilation tower must be demolished and rebuilt in a position a little closer to E18. The existing portal to this rock caverns is a bridge construction for Østfoldbanen. This bridge construction must be expanded because of the diversion.
The accessibility for executing the work with the portal construction is limited. The work site is jammed in between E18 Mosseveien and Østfoldbanen, and the height difference is considerable. Before the breakthrough of the tunnel is done there is only access from the outside. And the traffic on the road and railway makes direct access impossible. It is therefore planned to make a small access tunnel through the wall in the portal to Ekeberghallene and a trench in the rock up to the level at Østfoldbanen. This access will only be accessible for very small machines and by foot.
Along the Østfoldbanen it will be installed a continuous intermediate steel wall to prevent conflict between railway traffic and construction work. Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 25 of 29
Reference number: 201302255
Picture from the 3D model showing the tunnel portal below existing Mossevei (E18)
Excavation concept for crossing below existing Mossevei (E18)
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Reference number: 201302255
4. Preliminary Bill of Quantities – Base Case
Glossary:
bm – bored meter
pcs – pieces
ps m3 – planned (theoretical) solid masses (m3)
1. Preliminary Bill of Quantities – Base Case
ROADS Temporary construction roads in tunnel 3 800 m
PRE- EXCAVATION GROUTING Adit tunnels and reloading stations Probe drilling 3 700 bm Drilling of grouting holes 2 200 bm Gaskets 110 pcs Pre-excavation grouting compounds 70 tons
Railroad tunnels and technical rooms Probe drilling 13 400 bm Drilling of grouting holes 8 700 bm Gaskets 390 pcs Pre-excavation grouting compounds 170 tons
Alna river Probe drilling 3 400 bm Drilling of grouting holes 1 400 bm Gaskets 70 pcs Pre-excavation grouting compounds 30 tons
EXCAVATION Adit tunnels and reloading stations Drill and blast 38 000 ps m3
Railroad tunnel and technical rooms Drill and blast 250 000 ps m3 Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 27 of 29
Reference number: 201302255
Alna river Drill and blast - Access and re-routing tunnels 19 000 ps m3 Coarse boring holes 1 500 ps m3
TRANSPORTATION Transportation of excavated masses 308 500 ps m3
ROCK SUPPORT Adit tunnels and reloading stations Scaling 20 000 m2 Rock bolts and spiling 7 200 pcs Shotcrete 2 300 ps m3 Shotcrete arches 900 m
Railroad tunnels and technical rooms Scaling 84 000 m2 Rock bolts and spiling 35 000 pcs Shotcrete 12 000 ps m3 Shotcrete arches 3 500 m
Alna river Scaling 13 000 m2 Rock bolts and spiling 3 500 pcs Shotcrete 2 000 ps m3 Shotcrete arches 100 m
WATER AND FROST PROTECTION - CAST IN SITU LINING Levelling concrete 57 000 m2 Foundation for lining 4 900 m Concrete - Self compacting 13 500 m3 Concrete 3 400 m3 Formwork with casting shield 53 500 m2 Reinforcement 450 tons Membrane 58 000 m2
CONCRETE STRUCTURES - PORTAL, CULVERTS AND CROSS PASSAGES Concrete 5 100 m3 Formwork 10 100 m2 Reinforcement 460 tons
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Reference number: 201302255
RAIL FOUNDATION/AUXILLIARY WORKS Scaling/leveling of tunnel sole 27 000 m2 Frost protection of tunnel sole with XPS 16 500 m2 Manholes, varying sizes 70 pcs Cable ducts, three channel 5 300 m Cable crossings 20 pcs Drainage- and stormwater pipes in tunnel 4 500 m Ballast 12 000 m3 Firewater pipes 2 330 m Hydrants 12 pcs Pumpstation 1 pcs
SLAB TRACK Concrete 4 400 m3 Formwork 2 700 m2 Reinforcement 190 tons BALLAST TRACK Ballast 5 500 m3
2. Technical Description – Optional Case
The optional case includes excavation of the outbound Follo Line twin tunnels from profile 2.300 to profile 2.850
3. Preliminary Bill of Quantities – Optional Case
Preliminary main quantities, Optional case (increase of volumes induced by the option)
ROADS Temporary construction roads in tunnel 550 m
PRE- EXCAVATION GROUTING Railroad tunnel Probe drilling 2 700 bm Drilling of grouting holes 1 900 bm Gaskets 80 pcs Pre-excavation grouting compounds 40 tons
EXCAVATION Norwegian National Rail Administration Pre-qualification for D&B Tunnel – contract 2 Date: 2013-05-15 Follo Line Project Page: 29 of 29
Reference number: 201302255
Railroad tunnel Drill and blast 42 000 ps m3
TRANSPORTATION Transportation of excavated masses 42 000 ps m3
ROCK SUPPORT Railroad tunnel Scaling 18 200 m2 Rock bolts and spiling 4 600 pcs Shotcrete 1 900 ps m3 Shotcrete arches 0 m
WATER AND FROST PROTECTION - CAST IN SITU LINING Levelling concrete 14 000 m2 Foundation for lining 1 100 m Concrete - Self compacting 2 800 m3 Concrete 700 m3 Formwork with casting shield 11 500 m2 Reinforcement 70 tons Membrane 13 000 m2
RAIL FOUNDATION/AUXILLIARY WORKS Scaling/leveling of tunnel sole 5 000 m2 Frost protection of tunnel sole with XPS 3 300 m2 Manholes, varying sizes 10 pcs Cable ducts, three channel 1 100 m Drainage- and stormwater pipes in tunnel 550 m Ballast 2 000 m3 Firewater pipes 550 m Hydrants 5 pcs
SLAB TRACK Concrete 2 200 m3 Formwork 1 400 m2 Reinforcement 100 tons