• Works to be carried out along established urban areas

  • Site overview

  • The steel bell, enhances both efficiency and safety of the TBM launching operation

  • TBM launching shaft

  • Assembly of the TBM

  • Factory Acceptance Test Ceremony held in September 2011

  • TBM Launching Ceremony held in January 2012

  • FIRST in Hong Kong: Manual removal of pile obstructions in front of the cutter head

  • Tunnel excavated by Tunnel Boring Machine

  • Down Track Tunnel (North Side) TBM Breakthrough Ceremony held in Dec 2012

  • Up Track Tunnel (North Side) TBM Breakthrough Ceremony held in Nov 2013

  • Nam Cheong Ventilation Building (VB7) Topping Out Ceremony held in June 2014

  • Mei Lai Road to Hoi Ting Road Tunnels successful breakthrough

  • FIRST in Hong Kong: A sizeable TBM (9.33m in diameter) broke through under water

  • Tunnel Breakthrough Ceremony held in Oct 2014

  • FIRST in Hong Kong: 1:1 TBM cutter head model set up for training

Railway

MTR Express Rail Link Contract No. 820 – Mei Lai Road to Hoi Ting Road Tunnels

2010

The scope of this project (Contract No. 820) includes the construction of two parallel single track tunnels of 8.15 metres in diameter, each 3.5 kilometres long with 14 connecting cross passages, a ventilation building, underpinning a flyover and the removal of various foundations and underground obstructions along the tunnel alignment.
 
Despite the project’s many challenges, in particular the unforeseeable underground obstructions, our project team managed to deliver the project on time and achieve a number of “firsts” in terms of both technical skill and production efficiency. For instance, it was the first ever project in Hong Kong to have such a sizeable Tunnel Boring Machine (TBM) (9.33 metres in diameter) breakthrough under water in compressed air. During TBM excavation, a record of 21 unexpected heavy-duty steel piles was removed in front of the cutter head in a compressed air environment under unstable ground conditions, and yet the project experienced zero cases of hyperbaric sickness throughout TBM excavation. In terms of production, the first breakthrough of the cross passage between the up track and down track TBM tunnels was conducted one month ahead of schedule, making it the first completed tunnel section on the entire XRL Hong Kong Section. Record-breaking success was also achieved with the TBM: the best production day completed 22 rings or 39.6 metres of excavation and lining, and the best production month completed 309 rings or 556.2 metres of excavation and lining.
 
The project team achieved a consecutive 1,682,640 man-hours of no reportable accidents – the best record among all MTR projects, as well as a wide array of Quality, Safety and Environment awards for our outstanding performance, such as a Gold Quality Award, Gold Safety Award, Lowest Reportable Accident Frequency Rate Award, and Gold Stakeholder Engagement Award.

Client MTR Corporation
Project Construction of two parallel single track tunnels of 8.15m in diameter, each 3.5km long with connecting cross passages (14 nos.), a ventilation building, underpinning a flyover and the removal of various foundations and underground obstructions
Cross passages 14
Cut and cover tunnel within TBM launch shaft 186m
Northbound tunnel 3,553m long, 8.15m in diameters
Southbound tunnel 3,559m long, 8.15m in diameters
Year 2010 - 2015