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官厅水库输水泄洪洞改建工程是北京市政府2000年制定的缓解我市水资源紧缺状况26项紧急措施中的一项重要内容。于2001年9月动工兴建,预计2003年4月底竣工。1 闸门井工程施工中的技术难题 输水泄洪洞改建主要工程内容包括:大坝上游坝坡输水泄洪洞竖井开挖工程,新建闸门井,增设事故闸门和弧形工作闸门以及新闸室上游直径7 m,总长86m的隧洞钢管衬砌。
Guanting Reservoir flood diversion tunnel reconstruction project is the Beijing municipal government in 2000 to ease the city’s water shortage situation 26 emergency measures an important part. Construction started in September 2001 and is expected to be completed by the end of April 2003. Technical problems in construction of sluice gate The main project of rebuilding flood discharge tunnel includes: excavation of shaft spillway in water supply and discharge tunnel on dam slope upstream, new gate well, additional accident gate and arc working gate, and upstream of new gate chamber Diameter 7 m, total length of 86m tunnel steel pipe lining.