以石太客运专线太行山隧道Z5标段膏溶角砾岩地段为依托，分析膏溶角砾岩物质组成和工程特性，并对其进行了分级。针对这种特殊岩土的工程特点和危害，采取了相应的施工方案和施工措施，通过比选，确定了台阶法施工方案，较好地解决了施工中易膨胀、易坍塌、大变形等施工难点，实现了安全、快速施工，为类似工程提供了很好的借鉴。

Based on the analysis of the gypsum breccia ground in Z5 bid section of Taihangshan tunnel on ShijiazhuangTaiyuan passengerdedicated railway, the authors summarize the compositions and engineering characteristics of the gypsum breccia ground and make classification of the ground. Due to the engineering characteristics and risks of the gypsum breccia ground, corresponding construction schemes and construction methods are adopted. After comparison and contrast, "top heading and bench" excavation method is selected, which solves the problem of swelling, collapse and large deformation easy to occur during construction and ensures safe and rapid tunneling. This paper can provide reference for similar projects in the future.