TEC Tunnel Engineering consultants

Project description

The Hong Kong – Zhuhai – Macau Bridge (HZMB) Fixed Link project provides for a fixed link between the two economic centres Hong Kong and Macau (both of which are Special Administrative Regions within PR China) and the mainland of China at Zhuhai. The whole link, which measures some 50 km in length, has been divided into several major sections. The Zhuhai Link has a length of some 14 km and consists of a bridge that runs from the Zhuhai-Macau BCF island towards the mainland where it converts into a tunnel underneath the Gongbei Border Crossing Facility.

Scope of work

TEC has performed a risk assessment including the definition of possible risk control measures for design scheme and construction organization for three different alignments. One alignment considered a single layer tunnel to be realised using the open excavation top-down method, another alignment also considered a single layer tunnel but then to be realised using the subsurface excavation method. The third alignment considered a double layer tunnel that was to be realised using the open excavation method with selected lengths using the subsurface excavation method and applying complex pipe-jacking methodology for the tunnel perimeter combined with freezing techniques for water tightness during the execution of the works.