城市岩溶区地铁隧道的溶洞超前探测及处治技术

以正在施工的大连地铁2号线（松江路站～东纬路站）暗挖区间工程为例，介绍了暗挖爆破法穿越富水岩溶区、溶洞发育区域时的施工工序流程和超前地质预报手段。利用地质补勘钻孔、超高密度电法跨孔电阻率CT探测、洞内超前探孔等技术手段详细探明溶洞发育位置、形态，通过洞内与地表相结合的处理方式消除或减小溶洞对暗挖施工的影响。超前地质预报手段与施工工序流程的成功应用，为类似环境下城市地铁施工提供参考及借鉴意义。

Construction Treatment Technology for City Metro in Karst Area

Based on the proposed underground cut tunnel section between Songjiang Road Station and Dongwei Road Station of DaLian metro line 2, this paper introduces the construction process and method of geology forecast of underground tunneling method, which was adopted in metro construction in water enriched karst area. The location of development and morphogenesis of karst were detected clearly by means of the technologies of additional geological exploration, high density resistivity method and advance detection. The impact of karst was eliminated or reduced by the combination treatment method between tunnel and ground surface. The successful application of the method of geology forecast provides a good reference for the city tunnel construction.