東江水水管 改善工程 Dongjiang Water Main Improvements 專 題 故 事 FEATURE STORY 採用創新技術的東江水水管改善工程 為持續確保東江水供應的可靠性及靈活性，我們已於二零二零 年九月開展極具挑戰性的上水及粉嶺東江水水管P4 改善工程。 此工程項目需要在短短兩年半內，更換長約五公里、直徑2.3 米的大型舊水管。工程已在二零二三年一月大致完成。 由於工程團隊運用新工程合約提倡的互信及合作共贏精神，在 採用創新科技提升管理效益、成本效益及工地安全方面取得出 色表現，項目榮獲備受讚譽的新工程合約2023 年度水務工程 項目大獎。項目取得的出色成就及創新領域包括： • 新思維和新技術：包括運用「內套喉管法」，把新水管（直徑為1.8 米的聚乙烯喉管，亦是迄今香港使用同類型最大的喉管）逐段 推入破舊喉管內，再用水泥灌漿填滿新舊管之間的縫隙，亦制 定了使用原有東江水水管P4為主管具成本效益的方案。該項目 成功減低對交通造成的影響，並在節省成本的情況下按時完成。 工程團隊和承建商緊密合作，共同克服技術困難，如為工程編 製新規格及採購喉管和焊接設備。 Embracing Innovation to Strive for Dongjiang Water Mains Improvements As part of our ongoing efforts to ensure a reliable and flexible water supply of Dongjiang water, we have embarked on a challenging project to conduct improvements to the Dongjiang Water Mains P4 at Sheung Shui and Fanling in September 2020. The project involves the replacement of large aged Dongjiang water mains of about five kilometres long with a diameter of 2.3 metres in a tight period of two and a half years. The project was substantially completed in January 2023. In light of the outstanding performance in adopting innovation and technology to enhance management efficiency, cost-effectiveness and site safety of the project through effective collaborative partnerships within the framework of the "New Engineering Contract", the project won the highly acclaimed NEC Water Contract of the Year Award 2023. Examples of project excellence and innovations include: • New Thinking and Technologies: These include adopting slip-lining method which involves rehabilitation of pipes by pushing a new liner (polyethylene pipe liner with a diameter of 1.8m, which was the largest ever used in Hong Kong) into the old pipes section by section and filling the gap between the new and the old pipelines with cement slurry. A cost-effective scheme using the existing Dongjiang water mains P4 as the host pipe was also formulated. The project has successfully reduced traffic disruption and was timely completed with cost savings. The project team and the contractor worked closely to overcome technical problems, such as compiling new specifications for the works and sourcing the pipes and welding machines. 水務署 二零二二至二三年年報 WSD Annual Report 2022/23 60 Scale up 升 級 開 拓
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