隧道下穿红线渠施工技术分析

岭西隧道在下穿浅埋、地表河流水量大的红线渠全~强安山玢岩地段时,先以超前地质预报对前方围岩状况进行预判,后以洞身超前大管棚注浆预支护、环形开挖预留核心土法开挖、全断面径向注浆辅以监控量测,成功穿过浅埋、地表河流水量大的全~强安山玢岩地段,获得良好的效果。

Construction Techniques of a Tunnel Undercrossing the Water Canal

This paper presents the construction techniques of Lingxi Tunnel undercrossing the Hongxian Canal. The Hongxian Canal which belongs to the Quan-Qiang Anshan rock formation has the characteristics of shallow buried and large water quantities. The tunnel excavation applied the geological condition prediction technique for the rock mass conditions to be excavated the large scale lead pipe grouting method was utilized in the excavated rock mass. Other excavation and supporting techniques, such as, circular excavation with core soils, the radial grouting and monitoring for the entire tunnel cross section, are also applied.