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Construction of Pipe Roof and Support System in Proposed Outlet Drain Undercrossing North Buona Vista Road, Singapore
T Sun, W& M Consultants, Singapore. email@example.com
Land Transport Authority, Singapore , Public Utilities Board, Singapore, Or Kim Peow Contractors (Pte) Ltd, Singapore
Abstract: The project in the paper included design and construction of a permanent 120m long RC box culvert and sewer diversion at North Buona Vista Road (NBV) Singapore. The pipe roof method was selected by the design and build contractor in fulfilment of the contract requirement for the 53 m box section undercrossing NBV Road. The adopted methodology comprised the installation by pipe jacking of numbers of interlocking steel pipes followed by traverse series of steel frames for safe mining of the tunnel. This served to maintain uninterrupted service conditions for the road, subways tunnel and other services. There are many challenges in the construction of pipe roof and mined tunnel. This paper deals with the consideration in the design and construction of such works. It also highlighted the problems encountered during the construction, subsequent solution adopted and protection of existing utilities as well as monitoring of settlement of the surrounding areas of the project.