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On‐Line Rehabilitation of Large‐diameter Water Mains in Hong Kong
Author(s) -
Vickridge Ian,
Shou Stephanus,
Habibian Ahmad
Publication year - 2007
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2007.tb07969.x
Subject(s) - mains electricity , pipeline transport , mainland china , rehabilitation , pipeline (software) , work (physics) , line (geometry) , trench , civil engineering , engineering , environmental science , forensic engineering , transport engineering , china , geography , environmental engineering , archaeology , electrical engineering , mechanical engineering , materials science , geometry , mathematics , layer (electronics) , voltage , neuroscience , composite material , biology
This article reports on one of the largest pipeline rehabilitation programs in the world, replacing approximately 3,000 km of Hong Kong's water mains in four stages at an estimated total cost of approximately HK$14 billion (US$1.78 billion). The article specifically details a section of the first stage of construction work, rehabilitation of approximately 3 km of 700‐mm‐ and 800‐mm‐diameter water mains that run directly beneath the traffic lanes of Tolo Highway, one of the most important transportation links between Hong Kong and mainland China. Project constraints are discussed, along with the evaluation of alternatives to using conventional open‐trench methods. The option of close‐fit on‐line rehabilitation was selected using a polyethylene (PE) liner pipe. Liner design considerations, installation, and benefits are discussed.