Designing for the Future
The construction methods selected for the Circle Line (MRT3) Project have been carefully designed with several key considerations in mind: cost-effectiveness, efficiency, and safety. These methods aim to minimize disruptions to road traffic and ensure public safety throughout the construction process.
Key Construction Activities
The main construction activities for the Circle Line (MRT3) Project include:
• Utilities Relocation
• Viaduct and Tunnel Construction
• Elevated and Underground Station Construction
• Depot Construction
• System Installation
• Operation and Testing
Viaducts and Tunnels
Viaducts will primarily be situated either along road sides or medians, while tunnelling for the underground sections will be conducted using advanced tunnel boring machines. Station boxes will be constructed using the cut-and-cover method, ensuring precision and safety in underground construction.
Technical Information
The typical cross section for single and double track segmental box girder viaduct as shown below.
The typical cross section for a twin bored segmental lined tunnel with 5.8m intrados diameter as shown below.
Noise Level
Department of Environment Guidelines on Environmental Noise
Land Use Category
L Aeq
Day
7am-10pm
L Aeq
Night
10pm-7am
L Max
Day & Night
10pm-7am
Noise Sensitive Area,
Low Density and
Suburban Residential Areas
60 dBA
55 dBA
75 dBA*
Urban Residential Areas
65 dBA
60 dBA
80 dBA*
Commercial Business Zone
70 dBA
65 dBA
80 dBA*
Industrial Zone
75 dBA
75 dBA
NA
*Average train passby L max in 1 hour
Noise Level
Department of Environment Guidelines on Environmental Noise
Land Use Category
L Aeq
Day
7am-10pm
L Aeq
Night
10pm-7am
L Max
Day & Night
10pm-7am
Noise Sensitive Area,
Low Density and
Suburban Residential Areas
60 dBA
55 dBA
75 dBA*
Urban Residential Areas
65 dBA
60 dBA
80 dBA*
Commercial Business Zone
70 dBA
65 dBA
80 dBA*
Industrial Zone
75 dBA
75 dBA
NA
*Average train passby L max in 1 hour
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| Land Use Category | L Aeq Day (7am - 10pm) | L Aeq Night (10pm - 7am) | L max Day & Night (10pm - 7am) |
|---|---|---|---|
| Noise Sensitive Areas, Low Density and Suburban Residential Areas | 60 dBA | 55 dBA | 75 dBA* |
| Urban Residential Areas | 65 dBA | 60 dBA | 80 dBA* |
| Commercial Business Zone | 70 dBA | 65 dBA | 80 dBA* |
| Industrial Zone | 75 dBA | 75 dBA | NA |
Built for Safety
Speed Control
Automatic Train Protection (ATP) system installed to monitor the speed of the train to ensure it operates within permitted speed levels.
Movement Authorization
Automatic Train Supervision (ATS) system to ensure train movement is authorised only when safety conditions are satisfied.
Telecom Safety
A reliable high-quality telecommunications system will be provided for safety and the efficient management of the Circle Line (MRT3).
Power Reliability
All life safety and operationally critical equipment will be powered from an Essential Power Supply and/or an Uninterruptible Power Supply (UPS) system.
Live Monitoring
CCTV for continuous live monitoring.
Police Patrol
Frequent police patrol.
Safe Metarial
Use of low smoke, zero halogen, low energy release, non-inflammable materials.
Fire-Resistant
Non-splintering and fire-resistant material will be used for the interior finish.
Flame Retardant
Flame retardant resin will be used for the manufacture of glass fibre reinforced plastic (GRP).
Fire Detection
Trains equipped with internal and underfloor fire detection systems.
Emergency Alarms
Trains equipped with passenger emergency alarm call points.
Backup Systems
Trains equipped with battery backup to run emergency lighting, ventilation and communications facilities for a period of time to support rescue or evacuation in the event of loss of traction power.
Non-Combustible
Non-combustible and non dripping materials will be used in the trains.
Secured Parts
All detachable parts and covers in the passenger compartments will be secured such that they cannot be easily removed or opened by unauthorised persons.
Project Information
Circle Line (MRT3)
Rail Line
