doi:10.3850/978-981-08-6396-8_P070

ABSTRACT

The twin-bored tunnels along a section of Circle Line Stage 4 were constructed using Tunnel Boring Machines (TBMs) on long drives for greater cost efficiency. This adopted approach introduced interdependency between stations and bored tunnels construction. This resulted in greater programme challenges at the interfaces, which in turn, introduced significant programme risks to the project. This paper highlights the interfacing challenges and programme risks encountered; and the subsequent programme impacts aggravated by the interdependency between them. It also discusses the various mitigation measures implemented during the course of the project to mitigate further project delay. Lessons learnt from these experiences were shared in this paper.

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