員山子分洪隧道重點課題探討

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Abstract Yuanshantzu flood-diversion tunnel locates at the upper stream of Keelung River in Ruifang Town，Taipei County. This flood diversion project is totally 2.8 km in length，including one circular tunnel with a length of 2.5 km and diameter 12 m. This project serves to bypass water from Keelung River to sea directly，and it has lowered 1 310 cm for the down-stream water level in the flood period of year 2000. Due to the high flow velocity in tunnel (up to 17 m/s)，the strategy for concrete abrasion is essential. The following design issues，such as cross section，support and lining，geological investigation during tunneling，control measures of the hydrating temperature in high strength concrete and treatment of concrete abrasion，are discussed.

Key words： tunneling engineering flood-diversion tunnel concrete abrasion

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https://rockmech.whrsm.ac.cn/EN/Y2004/V23/IS2/4860