London Underground Ltd Halcrow Group Limited
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London Underground Ltd York Road Station Re-opening Volume 1 Technical Pre-Feasibility Report March 2005 Halcrow Group Limited London Underground Ltd York Road Station Re-opening Technical Pre-Feasibility Report April 2005 Halcrow Group Limited Halcrow Group Limited Vineyard House 44 Brook Green London W6 7BY Tel +44 (0)20 7602 7282 Fax +44 (0)20 7603 0095 www.halcrow.com Halcrow Group Limited has prepared this report in accordance with the instructions of their client, London Underground Ltd, for their sole and specific use. Any other persons who use any information contained herein do so at their own risk. © Halcrow Group Limited 2005 Halcrow Group Limited Vineyard House 44 Brook Green London W6 7BY Tel +44 (0)20 7602 7282 Fax +44 (0)20 7603 0095 www.halcrow.com London Underground Ltd York Road Station Re-opening Technical Pre-Feasibility Report Contents Amendment Record This report has been issued and amended as follows: Issue Revision Description Date Signed 00 00 Draft 14.03.05 NGH 00 00 Final issue 11.04.05 NGH Contents Figures 7 1 Executive Summary 0 1.2 Business Case Analysis 1 2 Introduction 2 2.1 Purpose of study 2 2.2 York Road Station 3 2.3 Study Team 4 3 Methodology of Study 5 3.1 Existing information 5 3.2 Consultation and reporting 5 3.3 Site visits 6 3.4 Pedestrian Route Study 6 4 Station Building 7 4.1 Original building configuration 7 4.2 Existing condition 12 5 Appraisal of Options 15 5.1 Outline of strategy 15 5.2 Design concept 15 5.3 Concourse level 16 5.4 Shafts 19 5.5 Platform level 22 5.6 Preferred scheme 24 5.7 Non compliances inherent in preferred scheme 24 6 Services, Signals and Tunnel works 26 6.1 Mechanical and Electrical services 26 6.2 Signal works 26 6.3 Tunnel works 27 7 Implementation – Operational Issues and Construction Risks 29 7.1 Operational implications of station reopening 29 7.2 Construction risks 29 8 Costings 31 9 Conclusion 33 Appendix A – Project Brief 34 Appendix B – Existing drawings 35 Appendix C – Design analysis 36 Appendix D – Cost report 37 Appendix E – Mechanical and Electrical report 38 Appendix F – Signal report 39 Appendix G – Tunnel works 40 Appendix H – Consultation notes 41 Figures Figure 1 – Location of station on Piccadilly Line Page 3 Figure 2 – Location plan Page 3 Figure 3 - Buschow Henley proposal for adjoining land Page 5 Figure 4 - Overall front elevation Page 6 Figure 5 - Front elevation photograph Page 7 Figure 6 - Rear elevation photograph Page 7 Figure 7 - Original elevation and section drawings Page 8 Figure 8 - Original concourse layout prior to closure Page 9 Figure 9 - Original platform layout with existing adaptations Page 11 Figure 10 - Photograph of shaft 2 Page 13 Figure 11 - Photograph of shaft 3 Page 13 Figure 12 - Cross passage photo between shafts 1 and 2 Page 14 Figure 13 - Detail of cross passage between shafts 1 and 2 Page 14 Figure 14 - Proposed concept perspective of front elevation Page 17 Figure 15 - Scenario 1 concourse plan Page 18 Figure 16 - Scenario 1 longitudinal section Page 21 Figure 17 - Scenario 1 platform plan Page 23 Figure 18 - Scenario 1 cross section Page 28 1 Executive Summary 1.1.1 London Underground Ltd commissioned Halcrow Group Ltd to determine the technical feasibility and quantified business case for an additional Piccadilly Line station, on or near the site of the former York Road Underground Station, which closed in 1932. The commission has two discrete outputs. The first, which relates to the technical aspects of the station re-opening proposition, is this technical pre- feasibility report. The scope of the technical aspects of the study was to identify infrastructure upgrade options for a re-opened York Road Station, to undertake sufficient engineering analysis to prove feasibility of construction of the proposed works, and to determine costs of design, construction and commissioning. 1.1.2 A series of archived drawings were made available by London Underground Ltd. These included sections and plans of some of the original construction drawings. The options developed by the team for the station were reviewed by LUL on various occasions, including a technical workshop. Site visits were made by members of the team in conjunction with LUL. 1.1.3 The general design principles adopted were: • Step free access to platform level from concourse level • Enlarged concourse with ticket purchasing facilities, based on anticipated throughput from the business study • Reinstated platforms and upgrade of subterranean areas • Station staff and commercial accommodation • Secondary means of escape from platform • Ventilation of tunnels and station • Station compliant to current standards 1.1.4 The “do-minimum” solution developed uses the three existing shafts to provide from platform level a single lift shaft with twin lifts and an emergency staircase exit compliant with Standards, contained within a fire-hardened platform environment; and a ventilation shaft. The capital cost of the works necessary to reinstate the station on the do-minimum basis is £16.2M on the assumption that it could be carried out simultaneously with the Piccadilly Line Upgrade project. Doc No TCOYKR Rev: - Date: March 2005 0 T:\TBG Projects\TRC Projects\TCOYKR York Road\Final report\Technical Pre-feasibility Report revised april.doc 1.1.5 That option provides a level of passenger capacity of 4200 pax/hr, limited by lift capacity. A number of derogations from Standards would be required to be sought as a consequence of the geometry of the existing sub-surface areas. To accommodate a greater throughput of passengers, additional lift capacity could be provided, but extensive reconfiguration of sub-surface areas would be required in addition, with substantial new tunnel works and track re-alignments necessary to eliminate the non-compliances with Standards. The potential disruption of such works to Piccadilly Line services would be substantial. 1.1.6 Considerable uncertainties exist in the forecasts of future patronage from the re- developed catchments area, and the extent of additional surface public transport links that would be provided to serve the ‘Kings Cross Lands’ development. If it became evident as the design of the development proceeded that a higher level of passenger throughput would be required over that accommodated by the “do- minimum” option, a completely rebuilt station would have to be contemplated. 1.2 Business Case Analysis 1.2.1 An outline business case analysis has been conducted on the scheme and is presented in volume 2 of the report. The appraisal has been carried out in line with the TfL Business Case Development Manual (BCDM) and engenders clear definitions of the scheme objectives and the measures of performance against which the benefits of the scheme are assessed. 1.2.2 The central case passenger demand forecasts indicate that around 9,200 passengers would use York Road Station during the morning peak. The Pedroute analysis of pedestrian movements through the station indicates that proposed design layout would operate within acceptable tolerances. 1.2.3 An assessment of the impact of re-opening York Road Station on the level of crowding at King’s Cross St Pancras indicates it will provide little in the way of congestion relief. Furthermore, the addition of a further stop on the Piccadilly Line provides considerable journey time disbenefits to all existing users. 1.2.4 1.2.5 Overall, the scheme performs poorly in economic terms with a negative net present value to society of -£34.1 million and a benefit to cost ratio of merely 0.03 : 1. Doc No TCOYKR Rev: - Date: March 2005 1 T:\TBG Projects\TRC Projects\TCOYKR York Road\Final report\Technical Pre-feasibility Report revised april.doc 2 Introduction 2.1 Purpose of study 2.1.1 London Underground Ltd commissioned Halcrow Group Ltd to determine the technical feasibility and quantified business case for an additional Piccadilly Line station, on or near the site of the former York Road Underground Station. 2.1.2 The commission has two discrete outputs. The first, which relates to the technical aspects of the station re-opening proposition, is this technical pre-feasibility report. The second, which relates to the business case aspects, is a Business Case prepared in accordance with Transport for London guidance and methodology. 2.1.3 The scope of the technical aspects of the study is as follows: (i) Identify infrastructure upgrade options for a re-opened York Road Station, to be compliant with London Underground Ltd space planning standards, and incorporating step-free access. Existing (disused) station infrastructure is to be considered for re- use wherever practicable, to minimise the cost of the required works. (ii) Undertake sufficient engineering analysis to prove feasibility of construction of the proposed works, and to determine costs of design, construction (including all necessary fitting-out) and commissioning to a stated accuracy tolerance not worse than 50%. Demand assumptions for station sizing assessment are to follow the guidance in London Underground Ltd Station Demand Modelling guidance. (iii) Assess and cost modifications to tunnels, track, signalling, and other line-side systems necessitated by construction and operation of the new station. It is to be assumed that these would be integrated with the future Piccadilly Line Upgrade works Doc No TCOYKR Rev: - Date: March 2005 2 T:\TBG Projects\TRC Projects\TCOYKR York Road\Final report\Technical Pre-feasibility Report revised april.doc 2.2 York Road Station 2.2.1 York Road Underground Station, approximately 1km north of Kings Cross station is positioned between Kings Cross St Pancras and Caledonian Road stations on the Piccadilly Line (fig 1).