Featuring a unique retractable design, this innovative Retractable TBM adopted by CRBC (HK) for the first time in Hong Kong eliminates the need for a retrieval shaft. Instead, the TBM can be directly retracted to the launching shaft for dismantling and recovery. This approach effectively optimises construction sequences, saves working space, and enhances operational efficiency and economic benefits under complex road network environments. The equipment offers the following merits:

A. Innovative Retractable Design: Eliminating the need for a retrieval shaft, the TBM can be directly retracted to the launching shaft for dismantling and recovery upon construction completion. This method eliminates the utility diversion at the receiving side, and minimises impacts on the traffic and surrounding sensitive receivers.

B. Adaptability to Complex Site Conditions: Flexibly addressing major challenges such as restricted working spaces, dense underground utility networks (water mains, electricity cables, and telecommunication cables etc), and highly variable geology, the equipment effectively copes with complex geological strata including cobble and sand layers along the alignment. When encountering obstructions, the cutterhead can be retracted to achieve breakthrough, thereby ensuring the continuous advancement of tunnels.

C. High Efficiency & Cost Effectiveness: This Retractable TBM operates automatically to cut costs, improve safety and space utilization, and reduce impacts on traffic and residents.

D. Improved Safety & Environmental Performance: Through the automated operation, it can reduce manual operations for better safety, minimize environmental impacts, and promote green construction.