Page 126 - Dragages Hong Kong 60th Anniversary
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DRAGAGES HONG KONG / ONGOING PROJECTS
As Hong Kong’s deepest, longest and largest sub-sea road tunnel, this project has the largest contract sum ever awarded in Hong Kong,
a reflection of the project’s scale and complexity.
This dual two-lane sub-sea tunnel will run between the western New Territories and Lantau Island. The world’s largest Tunnel Boring Machine (TBM) of 17.6 metres
in diameter and two identical mix-shield TBMs of
14 metres in diameter will be used to construct the road tunnels. These state-of-the-art machineries are equipped with in-house innovations – namely MOBYDIC, SNAKE and TELEMAC – which enable real-time geological mapping of rock faces, and robotic detection of damaged components on the cutterhead to reduce manual inspections under hyperbaric conditions.
Working under a compressed-air environment is the key challenge of this project. The project team has proposed to use a saturation technique for maintenance works on the TBMs’ cutterheads, which will maximise the health and safety of workers, while also enhancing work efficiency.
Sustainable measures are in place during and after construction, such as recycling excavated materials from the north reclamation as backfilling of the launch shaft or returning it as public fill. The two ventilation buildings will attain a HKBEAM Plus Gold rating upon completion. Wind turbines will also be built in both buildings for renewable power generation.
作為本地最大、最長、最深的海底 行車隧道,本項目的合約總值是香港 歷來之冠,足以反映項目的規模和 複雜程度。
這條雙線雙程海底隧道將連接新界西及大嶼山。 為建造本項目,工程人員起用全球最大型、直徑 17.6米的隧道鑽挖機和兩台直徑14米的混合盾構式 隧道鑽挖機。隧道鑽挖機均配置由寶嘉自行研製的 嶄新系統 — MOBYDIC,SNAKE及TELEMAC, 能即時勘察巖石的表面情況,以及自動偵測鑽頭 零件的損壞程度,從而減少於高壓情況下人手檢查 的程序。
如何在壓縮空氣的環境下施工是本項目的重大挑戰。 工程團隊會以飽和方式維修隧道鑽挖機的鑽頭, 保障工程人員的健康與安全,同時提升施工效率。
於設計過程中,可持續發展是其中一個主要的考慮 因素。團隊引入多項環保措施,例如,北面填海 挖出的泥石會循環再用,用以回填豎井及用作公眾 填料。兩幢通風大樓的設計均以達到環保建築評估 HKBEAM Plus的金級標準為目標。兩幢大樓都會 設置風力發電機,產生再生能源,達致最佳能源 效益。
Extensive adoption of pre-cast elements
大量採用預製組件
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