The project comprises the design and construction of a dual two-lane trunk road, including an approximately 4.8km long tunnel linking up the proposed Sha Tau Kok Road interchange and Fanling Highway interchange; three ventilation buildings; and an administration building.
To cope with various ground conditions along the 4.8km route, a combination of Tunnel Boring Machine (TBM), and drill and blast solutions is adopted. A dual mode Earth Pressure Balanced (EPB) TBM is used for the construction of the tunnels in the northern section, where various fault zones are located. By using our in-house innovations of MOBYDIC and TELEMACH, the TBM features real-time geological mapping of rock faces, and the detection of damaged cutter head components. Meanwhile, drill and blast is implemented in rock zones in the southern section.
Tunnelling through the first 500m of the enlarged section from the North Portal in soft ground presented great challenges. A pilot tunnel is bored by TBM, followed by enlargement works conducted in traditional soft ground tunnelling method.
Caring for the needs of the community is an integral part of our project works. A Community Liaison Group, comprising both engineers and community liaison officers, are working hand in hand with our supervising officer and the client to keep local residents informed of key production activities, and to address their concerns in a prompt and efficient manner.