Hyder Consulting has begun work on long-term stabilisation of a high cut slope in the Sha Tin area of Hong Kong which slipped in July 1997.
Failure of the 28m high slope caused disruption to East Rail mainline railway services linking Hong Kong with Shenzhen. Interim stabilisation works, carried out immediately, comprised sprayed concrete and improved surface drainage.
The permanent solution consists of soil nails and dowels to reinforce the insitu soil and rock portions of the slope respectively and a bored pile retaining wall to support the overlying fill slope.
The Kowloon-Canton Railway Corporation appointed Hyder to carry out a design review of the proposed permanent solution, tendering and construction management of the work.
Construction, which is expected to start in the summer and take 20 months, will be complicated by the proximity to the live railway. For safety reasons, work will be carried out during restricted daytime hours and night-time possessions, said Hyder Consulting project director Alan Clover.