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一、引滦入津隧洞概况引滦入津隧洞是穿过滦河与(氵黎)河分水岭的一条无压引水隧洞,断面为圆拱直墙形,净宽5.7米,长约9.7公里。隧洞根据围岩的情况采用了与之相适应的衬砌形式。在围岩条件较好的洞段,顶拱采用了10
I. Introduction of Luanhe to Tianjin Tunnel Introduction Luanhe to Tianjin Tunnel is a non-pressure diversion tunnel that crosses the Luan River and the (氵 Li) River watershed. The cross section is a circular arched straight wall with a net width of 5.7 meters and a length of 9.7 kilometers. According to the surrounding rock tunnel conditions with the appropriate lining form. In the tunnel with good surrounding rock conditions, the roof arch adopted 10