Managing Safety and Risks in Singapore Mass Rapid Transit Projects
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Managing Safety and Risks in Singapore Mass Rapid Transit Projects Mr Henry Foo Yung Thye Deputy Group Director, Thomson-East Coast & Cross Island Lines (Civil) Land Transport Authority 2 Outline of Presentation ▫ Introduction ▫ Development of Singapore’s MRT System ▫ Thomson-East Coast Line ▫ Management of MRT Construction in Singapore ▫ Challenges and Innovations in LTA’s MRT Projects ▫ LTA’s Approach to Construction Risk Management ▫ LTA’s Insurance Strategy Introduction 3 Singapore Population: 5.6 mil 721.5 sq km 14% CBD 12% High-density housing Housing Roads Others 4 About Land Transport Authority (LTA) • Statutory board under the Ministry of Transport, which spearheads the development, operation and maintenance of land transport systems in Singapore. Ministry of Transport Land Civil Maritime Public Transport Aviation & Port Transport Authority Authority Authority Council 5 About Land Transport Authority (LTA) • LTA consists of over 20 groups supporting projects and regulation in public transportation systems • Total staff strength of more than 6,000 A People-centred Vision Land Transport System Connecting People and Places, Enhancing Mission Travel Experiences 6 Land Transport Master Plan Key Targets by 2030 75% 8 in 10 Of all journeys in peak hours undertaken on HOUSEHOLDS public transport 85%<60mins 85% of public transport journeys of less than 20km Within completed with 60 minutes 10 mins walk from a train station To attract commuters to shift from private transport to taking the MRT 7 Development of Singapore’s MRT System 8 Singapore’s Mass Rapid Transit System Canberra North-South Station Line Punggol LRT Sengkang Bukit Panjang LRT LRT North-East Downtown Line Line Circle Line East-West Line Rail network nearly doubles from 200km today to 360km in 2030! 9 Components of Rail Transit System • Tunnels • Signalling • Stations Operator • Communication • Architecture • Supervisory Control • Trackwork System Civil System • Depot Works • Maintenance • Survey Management System Rail Transit • Electrical System Building System Power • Fire Protection System Services Supply • Escalators, Lift and Passenger Conveyors • Tunnel Ventilation and Environment Control • Electric Trains Systems Fare Rolling • Construction Wagons & Service Collection Stock Locomotives • Depot Equipment 10 Civil Construction Components 11 Electrical and Mechanical Components 12 Typical Rail Project Cycle – Design & Build Projects Civil Contract Basic Structure Revenue Award Completion Service 0.5 – 0.8 yrs 2 – 2.5 yrs T & C* 4.5 – 6 yrs E&M and Architectural Works Strutted Excavation & Permanent Structures Design & Temporary Works Typical Project Duration: 8 Years from Civil Contract Award till Revenue Service *T & C – Testing & Commissioning 13 Thomson-East Coast Line 14 Thomson-East Coast Line No. of Stations: 31 No. of Interchange Stations: 7 No. of Depots: 2 Route Length: 43km Train System: 4-car train Project Daily Ridership: 500,000 No. of TBMs: 53 15 Thomson-East Coast Line 2019 2020 2024 2021 2023 16 Thomson-East Coast Line – Depots East Coast Integrated Depot Mandai Depot 17 Management of MRT Construction in Singapore 18 Key Pillars of Project Management Safety & Budget Schedule Environment Management Management Management Quality Community Management Engagement 19 Key Pillars of Project Management Safety & Environment Management Budget Management Schedule Management Safety Process & Risk Management Financial Controls Structured Programme Safety Targets Best Value Achievable Schedule Audits Value Engineering Measures to Expedite Works Noise & Dust Management Commercial Considerations Commercial Implications Water and Energy Efficiency Fair Risk Sharing Interface Management Quality Management Community Engagement Simple, Elegant, Timeless Design Engagements with Stakeholders Reliability Measures to Minimize Inconvenience Built to Last Open Channels for Feedback Safe to Build Newsletters and Circulars Safe to Use Community Involvement 20 Procurement Strategy for Major Rail Projects The main types of contracts adopted are “Design & Types of Build” and “Build-Only”. Contracts Selective tendering process adopted for the Design & selection of contractors for the construction works. Build-Only Contractors are pre-qualified for the project based Build on the following criteria: o Technical Expertise Consultant o Project Management Design (A/E) o Safety & Quality Management o Relevant Track Records o Current Workload & Capacity and Financial In-House Capacity Design 21 22 Pre-Qualification of Contractors Submission of Tender Proposals Tender Evaluation and 2-Envelope Submission: Quality & Price Proposals Contractor Selection Process o Price-Quality (PQ) Method to evaluate the Evaluation of Q-Score tender submissions. Quality Proposal Price will not be opened if minimum o The price is only evaluated if the quality passing score is not achieved submission meets LTA’s requirements Evaluation of and quality standards P-Score Price Proposal o Quality submission includes technical proposal (methods of construction and preliminary risk assessments), safety Combined P-Q Score Evaluation records, past project performance etc. o Tender technical evaluation eliminates Tender Award to Highest PQ Score high risk proposals. Effective Management of the Rail Project Construction Dedicated and qualified LTA project teams present at each project site full-time to monitor and manage its implementation. Project Teams supported by various divisions within LTA throughout the project implementation. LTA Project Teams Project Design Project Commercial / Programme / Public Supervision Support Coordination Contractual Planning Relations Direct Coordination supervision of Manage design with other Financial Project Engagements works for submission Authorities and management planning and with affected Safety, review process LTA Divisions and cost control scheduling stakeholders Environment & Quality 23 24 Infrastructure Design & Engineering Group LTA Project Teams Quality Service Safety & Rail Infrastructure & Project Teams are supported Manager Office Contracts Enhancement / by various divisions within LTA Community Programme Partnership Thomson East Coast & Planning, Safety throughout the project Cross Island Lines implementation. Group (Rail Projects) Transportation & Corporate Road Operations Communications Traffic Management Challenges and Innovation in LTA’s MRT Projects 25 Key Challenges Encountered during MRT Construction Densely Built-Up Areas Variable Ground Conditions Protecting Existing MRT Infrastructure 26 27 Densely Built-Up Areas . Land Acquisition . Multi-Stages Traffic Diversion . Tunnelling under Buildings / Structures . Proximity to Residential Estates and Commercial Establishments 28 Land Acquisition While all efforts have been Pearls Centre (L) and Semi-detached houses @ Amber Rd (R) acquired for made to minimize land construction of Thomson-East Coast Line acquisition, the Government has had to acquire private land for the construction of the MRT lines. Block 303 acquired for construction Palmer House partially acquired for of Jurong Regional Line construction of Circle Line Stage 6 29 Traffic diversions along Orchard Boulevard Road for TEL Orchard Station Multi-Stages Traffic Diversions o Stations are typically located underneath roads in order to maximize the use of limited land available. o Multiple stages of traffic diversions required to construct the stations. o Increased use of innovative trenchless technologies (e.g. Pipe Roofing, RTBM) to minimize surface disruption. Tunnelling under Buildings / Structures □ Due to limited space available and heavily built-up nature, the MRT tunnels often constructed beneath or in close proximity to existing buildings and structures. □ Foundation investigations / underpinnings carried out to ensure the tunnelling works do not impact the building / structure. □ Examples of underpinning in TEL: 4-storey Block 258 at Ang Mo Kio Ave 4 9-storey building at Botanic Gardens View 4-storey HDB Block 258 9-storey block of Botanic Gardens Viewv TEL Tunnels undercrossing multiple properties between 30 Stevens and Napier Stations Proximity to Residential Estates and Commercial Establishments • Dedicated PR officers from LTA and Contractor PR • Regular engagements via briefings and circulars Strategy • Involvement of community in the MRT development. 12m-high noise barriers around the site perimeter • Extensive noise and dust mitigation Noise measures prescribed upfront to minimize the inconveniences. and Dust • Contractor to abide by NEA’s regulations on working hours and Control permissible noise limits Noise enclosure around tunnel launch shaft and STP 31 32 Variable Ground Conditions . Highly variable ground conditions . Construction in soft fluvial and marine clay layers East-West North-South North-East Circle Downtown Thomson-East Coast Highly Variable Ground Conditions 33 34 o Extensive soil investigations carried out before contract award to establish the ground conditions. Highly Variable o Provision of a Geotechnical Interpretative Baseline Report (GIBR) Ground Conditions to the contractor documenting the baseline ground conditions at the project area. o Construction methods (top-down / bottom-up), ERSS designs (dwall / CBP / SBP), type of TBMs (EPB / Slurry) prescribed based on the anticipated ground conditions. o Extensive ground treatment carried out to strengthen areas with soft soil (marine clay / fluvial layers). Methods of ground treatment include Jet Grout Piles, Deep Soil Mixing, Deep Cement Mixing