摘要
浅埋输水隧洞开挖时受不良地质条件、地表及地下水丰富、施工不当等因素影响时,易发生地表塌陷或洞内塌方事件。以鄂北地区水资源配置工程快活岭隧洞下穿水塘浅埋段洞内出现塌方为例,根据现场地形地质情况综合分析,采取洞内掌子面回填封闭后在地表覆盖层及强风化基岩层进行固结灌浆,并在洞内采用超前大管棚支护和台阶法开挖施工的处理措施后安全通过此段隧洞,可为此类浅埋输水隧洞塌方处理提供一定的参考。
When the shallow water conveyance tunnel is excavated due to adverse geological conditions, abundant surface and groundwater, improper construction and other factors, it is prone to surface collapse or cave-in events. Take the example of the collapse in the shallow buried section of the Kuaihuoling tunnel of the water resources allocation project in northern Hubei. According to the comprehensive analysis of the site topography and geology, the tunnel face in the cave is backfilled and sealed and then consolidated and grouted on the surface overburden and the strongly weathered bedrock layer. At the same time, adopting the treatment measures of advanced large pipe shed support and step method excavation construction in the tunnel safely pass this section of the tunnel, which can provide a certain reference for the collapse treatment of this kind of shallow water conveyance tunnel.
作者
沈晶
金学洋
Shen Jing;Jin Xueyang(Hubei Institute of Water Resources Survey and Design,Wuhan 430070,Hubei)
出处
《陕西水利》
2021年第12期123-125,129,共4页
Shaanxi Water Resources
关键词
浅埋输水隧洞
不良地质洞段
塌方
固结灌浆
超前大管棚
Shallow water conveyance tunnel
poor geological tunnel section
landslide
consolidation grouting
advanced large pipe shed
