Maunsell Consultants Asia Ltd
Project Information Sheet
Kwun Tong Bypass Phase II
Hong Kong
Client: Highways Department, HKSAR Value: HK$770 Million Construction Period: September 1989 to July 1991 Services to Client: Preliminary Report, Design, Contract, Construction and Completion Stage Services The 4.8 km long Kwun Tong Bypass connects the Eastern Harbour Tunnel and the Tate’s Cairn Tunnel and is part of the 18 km long Route 6 which provides a high speed link between Hong Kong Island and Sha Tin. Phase II of the Bypass comprises 2.3 km of dual 3-lane carriageway viaduct (and 0.9 km of access ramp viaduct) supported on reinforced concrete columns over land and sea along the Kwun Tong waterfront, from Wai Yip Street at its junction with Phase I to Kai Fuk Road at its junction with Phase III of the Bypass. A full diamond intersection is provided at grade on Wai Yip Street to enable traffic from the Kwun Tong industrial area and Cha Kwo Ling to access the Bypass.
At Kai Fuk Road, direct connections to access Kowloon Bay and the former airport at Kai Tak have been provided. These arrangements have eased traffic congestion in Kwun Tong Road and Wai Yip Street in the Kwun Tong District. All the viaduct spans of this phase of the Bypass were constructed by the precast balanced cantilever method – the first time this method of construction was used to build a bridge in Hong Kong. The precast concrete segments which weighed up to 80 tonnes each were match cast under factory conditions on site and transported to a specially designed erection gantry. This placed the segments two at a time so that the bridge was progressively built as a pair of cantilevers balancing on a central column. When one span length had been completed the erection gantry was launched forward to the next column and the cycle was repeated. The ancillar y works included 5 hectares of reclamation, and 1 km of new sea wall, to move the marine frontage of the existing Public Cargo Working Areas seawards,
away from the new viaduct. A new passenger ferry pier was built and the existing vehicular ferry pier was extended before construction of the viaduct started. A major 1.3 km long box-culvert interceptor sewer was constructed to replace and upgrade an older sewer on the alignment of the viaduct.