Page 76 - Dragages Hong Kong 60th Anniversary
P. 76

DRAGAGES HONG KONG / 2R0E0C0EsNPTRLOYJCEOCMTSPLETED PROJECTS
Ushering in a new era of MTR railway network expansion, the West Island Line Project extends the existing MTR Island Line from Sheung Wan to Kennedy Town.
The construction of two tunnels running between Sheung Wan and Sai Ying Pun Stations was one of the most sophisticated of all the MTR tunnelling works. Among the challenges was carrying out the tunnelling works under a densely populated area and overcoming the large volume of pile obstructions.
To cope with the complex geological conditions,
a tailor-made slurry Tunnel Boring Machine (TBM) was used for the construction of both tunnels, equipped with stringent safety features.
A number of new technologies were adopted for this project, which are exemplary of sustainable construction. Water was used as blast ballast, together with electronic detonators, and the entire blasting process took place inside a large noise enclosure. This was the first time in Hong Kong that a shaft was excavated in an urban area by blasting.
A Tunnel Dismantling Machine (TDM) was also deployed, which was the first of its kind in the world, for the demolishment of an existing overrun tunnel.
西港島綫是港島綫的延綫,從上環伸延至 1 堅尼地城,屬於新生代鐵路網的一部份。
  本項目需在上環及西營盤之間建造兩條隧道,沿途
  經過人煙稠密的地區,加上地底埋藏了大量樁柱,可算
  是港鐵其中一個最艱巨的隧道工程項目。
  工程小組考慮到工地的複雜地質狀況,引進了一台特別
  設計、安全標準十分嚴格的大型泥漿盾式隧道鑽挖機,
  應付東、西行隧道的鑽挖工程。
項目亦首次在港引進多項環保建築技術,例如首次以 水作緩衝,在爆破工程中採用電子引爆技術,同時以 大型隔音罩完全覆蓋爆破範圍,阻隔聲浪。此外,工程 2 亦為業界帶來首次在市區以爆破方法挖掘豎井的經驗, 為推動可持續建築提供最佳示範。
上環至西營盤隧道工程更是全球首個採用有關隧道拆卸機 的項目,拆卸現有的一段掉車隧道。
1/2: This was the first time in Hong Kong that a shaft was excavated in an urban area by blasting
  首次在香港市區作豎井爆破工程


































































































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