Tuen Mun-Chek Lap Kok Link in Hong Kong-Innovative Technologies and Methodologies for an Outstanding Project

摘要

On Tuen Mun Chek Lap Kok Link subsea tunnels project, the difficult ground conditions as well as the tunnel depth reaching almost 60 m made the tunneling works particularly challenging. Numerous innovative technologies and methodologies were thoroughly developed and implemented in order to overcome these challenges and to make the TBM drives a success. Two 14 m diameter TBMs were used along the 4.5 km long drive below the sea. One of them had started its drive with the world's largest diameter (17.63 m) along the first 630 m before being reconfigured into a 14 m diameter TBM. For hyperbaric maintenance interventions, saturation diving i system and full automatic robotic arms were developed to change a total of about 2000 disc-cutters on both TBM cut-terheads. Another major challenge was the construction of 41 subsea cross passages for which the pipe jacking methodology was adapted for the project. Apart from TBM drives, innovative design solutions were developed for the construction of Shafts, their crossing with TBMs and Cut and Cover sections including a 500 m-long and 43 m-deep Caterpillar- Figure 1. Tuen Mun shaped cofferdam with 15 cells.