Land Transport Authority
Contract 3370C – Completion Contract for Upper Paya Lebar Underpass
The construction of a two-lane dual carriageway vehicular underpass formed the key component of Contract 3370C. The development involved construction of depressed roads and underpass, which was situated underneath live traffic of Bartley Road East, with a total length of 570 m.
Due to the proximity of public properties, construction activities of Contract 3370C were cautiously planned and executed so as to minimize disturbances to public. In addition, Samwoh has designed and implemented a comprehensive system of Earth Retaining Stabilising Structure (ERSS) for deep excavation works in order to restrain the movement of surrounding soil effectively.
Furthermore, extensive monitoring instruments were deployed at strategic locations to ensure that the ground movement was within allowable limits. On the other hand, mitigation measures were in placed to prevent any flooding at low-lying terrain within the project boundary.
As part of the project, two pedestrian overhead bridges (POB) were constructed by launching six precast U-girders across Upper Paya Lebar Road. With the completion of this project, the road system within the project boundary was enhanced while drainage system along Upper Paya Lebar and Bartley Road was upgraded.