为研究穿越断层破碎带时隧道施工引起的围岩响应，该文以阳宗隧道为背景，配置与普通围岩、断层破碎带、衬砌的基本力学特性相似的模型材料，进行隧道开挖模型试验，同时，建立FLAC3D数值模型作为补充分析。结果表明:1)同一断面径向应力的大小为拱顶>仰拱>拱肩>边墙; 2)断层处各测点压力和围岩变形的变化大于断层前、后相应测点，断层拱顶处竖向累计沉降为22.3 mm，分别是断层前与断层后竖向累计沉降的1.47、1.57倍;3)围岩竖向位移的大小及分布与断层和隧道的相对位置有关，断层位于拱顶上方时，拱顶沉降较大，断层位于仰拱下方时，仰拱隆起较大，且距断层越近变形越大。

In order to study the response of surrounding rock caused by tunnel excavation while crossing fault fracture zones,this paper takes Yangzong Tunnel as the background to carry out tunnel excavation model tests by setting model materials with basic mechanical properties similar to those of ordinary surrounding rock,fault fracture zones,and linings. Meanwhile,a FLAC3D numerical model is established as a supplementary analysis. The results show that:( 1) The radial stress in the same cross-section follows the order of arch crown > inverted arch > arch shoulder > side wall.( 2) The changes of surrounding rock pressure and displacement in the fault are greater than those in the corresponding positions before and after the fault. The vertical cumulative settlement at the arch crown is 22. 3 mm,which is 1. 47 times and 1. 57 times the vertical cumulative settlement before and after the fault respectively.( 3) The magnitude and distribution of vertical displacement of surrounding rock are related to the relative position between the fault and the tunnel. When the fault is located above the arch crown,the settlement of the arch crown is large. When the fault is located below the inverted arch,the inverted arch bulge is large,and the closer to the fault,the greater the deformation.