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1 工程概况 第 九水厂引水隧洞由北京市水利规划设计研究院设计,原北京市第二水利工程处与北京市北运河管理处安装工程队承担施工。于1991年12月开工,1995年2月竣工。1995年5月22日正式运行。隧洞进口位于九松山副坝东侧约1.5km处,出口位于穆家峪乡,南穆家峪大队与水厂相接。主洞全长3029 m,主洞出口设有51 m长,DN3 500×δ16 mm钢管与第九水厂取水站相连接。主洞为圆形压力输水隧洞,洞径为3.5 m,衬砌厚度一般为25-60 cm,局部加强段衬砌厚度为70-100 cm。支洞全长87 m,为圆形压力隧洞,洞径2.5 m,衬砌厚度40 cm。该隧洞的设计流量为12.15 m3／s,日供水能力为100万m3。
1 Project Overview The Ninth Waterworks diversion tunnel designed by the Beijing Institute of Water Resources Planning and Design, the Beijing Second Water Works Agency and Beijing North Canal Management Office to install the engineering team to undertake the construction. Started in December 1991, completed in February 1995. May 22, 1995 formally run. The entrance to the tunnel is located at about 1.5km to the east of Jiuyishan Auxiliary Dam, with its exit at Mujiayu Township and the Namujiayu Brigade connected with the waterworks. The main tunnel is 3029 m in total length and 51 m long at the exit of the main tunnel. The DN3 500 × δ16 mm steel pipe is connected to the Ninth Waterworks Abstraction Station. The main hole is a circular pressure water transfer tunnel with a hole diameter of 3.5 m. The lining thickness is generally 25-60 cm. The local lining thickness is 70-100 cm. The branch hole is 87 m in length and is a circular pressure tunnel with a hole diameter of 2.5 m and a lining thickness of 40 cm. The designed flow of the tunnel is 12.15 m3 / s and the daily water supply capacity is 1 million m3.