特长深埋隧道断裂—岩溶发育段的勘察认识和反思

Exploration Understanding and Reflection of Tunnel Fracture-karst Developmental Section in Long Tunnel

在常规高速公路隧道勘探中,特长深埋隧道一般采用地质调绘、物探、钻探方法,即在以稀疏控制性钻孔配合全线物探剖面结合地调完成全线勘探工作,对覆盖层厚度、断裂破碎带、隧道围岩级别进行划分,此模式在汉十高速、厦蓉高速等隧道勘探中取得了较好的勘探效果。但在沪蓉西高速公路龙潭隧道断裂及强岩溶发育段出现了不足,未能达到理想效果,由于该问题比较典型,在此针对其问题进行总结反思。

Different approaches including geeological survey, geophysical exploration and drilling are used in long tunnel in conventional highway tunnel exploration. This model has achieved good exploration results in the Hanshi highway, Xiamen-Chengdu highway tunnel exploration. Tunnel fracture in Longtan tunnel and strong development of karst reveal the signs of shortfall not to reach the expected effect. Because the problem is more typical, the author makes deep investigation to it.