During the excavation of highway tunnel, the original three directional stress equilibrium state of the surrounding rock is broken,the stress distribution in the surrounding rock has been re-distributed. In a certain area around the tunnel, the surrounding rock failure zone is formed, this fracture zone is called the loose zone of surrounding rock, which is usually annular. Through the application of single hole acoustic wave method,refraction tomog-raphy method in a highway tunnel,the results show that the com-prehensive geophysical exploration method has fast, accurate and complementary effects in determining the surrounding rock loos-ing zone of tunnel.It can provides guidance significance for tunnel support design, and certain reference value for the deformation control in the process of tunnel construction.%公路隧道在地下原岩开挖中,打破了围岩原有的三向应力平衡状态,围岩应力重新分布,在隧道周围一定范围内形成围岩破裂区,一般为环状,此破裂区即是围岩松动圈.通过应用单孔声波法、折射层析成像法在某在建高速公路隧道中的测试,结果表明综合物探法在确定隧道围岩松动圈方面具有快速、精确、成果互补等良好效果,对于类似工程,能为隧道支护设计提供勘察指导意义,对隧道施工变形控制具有一定的参考价值.
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