HONG KONG'S troubled £267M sewerage scheme is facing a further five-month delay after a Jarva tunnel boring machine broke down on one of the main drives under urban Kowloon.
The Drainage Services Department said tunnelling would be stopped for up to five months while repairs were made. This will push completion of the 25km tunnel system, which is running three years late, well into 2001.
The TBM was being used by a Gammon/Kvaerner Cementation joint venture to build tunnel D, which goes under the runway at the former Kai Tak airport. It had bored about 50% of the tunnel drive before work stopped.
DSD spokesman Robin Lee told NCE that tunnelling came to a standstill after the main drive shaft on the TBM broke. He said: 'Gammon/Kvaerner has estimated the repair work would take three to five months before tunnelling can restart.'
This is the latest setback on the scheme. Earlier this year, a joint venture between Paul Y-ITC and Seli slowed tunnelling after it generated more than 250mm of settlement on both its drives, one each side of the harbour.