浅埋暗挖电力隧道穿越富水砂层的辅助措施

The auxiliary measures for shallow-underground electric tunnels in rich-water sand layer

介绍了项目的工程地质和水文地质情况,分析了项目的重难点,结合浅埋暗挖工法的"十八字方针",在注浆小导管、喷射混凝土、钢拱架等常规支护措施的基础上,提出了密插钢筋、铺设铁丝网、深孔疏水等辅助措施,使隧道顺利穿越含水砂层。

The geological and hydrological conditions of the tunnel project are introduced in the paper. The difficult points are analyzed. The auxiliary measures of densely inserted reinforcing steel bar and laying barbed wire and deep hole drainage are raised on the base of the conventional supported measures of advanced grouting small steel pipe and sprayed concrete and steel arch shelf, with the guidelines of eighteen words for shal- low-underground tunnels, the rich-water sand layer is smoothly excavated.