The North South Corridor (NSC) will be Singapore’s first integrated transport corridor that will connect the East Coast Parkway expressway in the South to Admiralty Road West in the North. The 21.5-kilometre expressway will feature continuous express bus routes and at-grade cycling trunk routes and will comprise 16 entrances and 17 exits to connect towns along the corridor.
The Land Transport Authority (LTA) tendered the works in fourteen design and build packages.
In collaboration with our local partner, BG&E has been awarded the Enhanced Accredited Checking Role for the NSC.
The scope of works includes being fully conversant on all aspects of the civil works (specifically, the viaducts, stabilising structures, retaining walls, buildings and other associated permanent structures), as well as to undertake a detailed review of these components).
The critical components include performing analysis and design checks with independent calculations for the:
- structural and geotechnical works including but not limited to major and minor structures and elements, connections, deck furniture, all fixings, parapets, railings, permanent noise barriers, claddings and fascia, to confirm the adequacy, stability and integrity of the structural system, under various construction sequence and loading conditions, meets serviceability requirements and compliance with the LTA’s specifications;
- proposed demolition sequence at existing structures or stations, checking the adequacy of the existing structures and the proposed protective and strengthening design works for the existing structures; and
- rail viaduct bearing articulation, design loading and movement ranges at movement joints.
BG&E’s role also includes:
- performing serviceability checks (including but not limited to deformation analysis and vibration) with independent calculations for the rail viaduct, retaining walls, buildings and other associated permanent structures where appropriate;
- conducting a design review of structural detailing, connection details including detailing of reinforcement bars and strengthening details;
- conducting a design review on drainage design, durability performance of the structures including fire protection, waterproofing, accessibility and maintainability, ease of future structural inspections and ease of future bearing maintenance and replacement works;
- reviewing the method and construction sequence, particularly in respect of the impact on public safety, checking the effects of the construction load on the permanent structures and construction safety risks; and
- checking pre-cambering of box girder for balanced cantilever segmental construction.