Cuojipo I tunnel is a key control tunnel in long-yong highway,and surrounding rock li-thology is mainly composed of tuff and basalt,complex traits.In order to understand the dustpan slope I tunnel cross section of surrounding rock deformation characteristics in tunnel tuff and basalt,containing the level of tuff and basalt sampling based on,to carry out the Brazilian split test,uniaxial compression test,direct shear test,stress corresponding rock mechanics parameters and related rocks.The curve of stress-strain are obtained,which provides a technical support for in-depth study of tuff and basalt inter-beds of tunnel surrounding rock mechanical properties.%撮箕坡 I 号隧道是龙永高速公路上一条关键控制隧道，围岩岩性以凝灰岩、玄武岩为主，性状复杂。为了了解撮箕坡 I 号隧道互层段围岩的变形特征，在对隧道凝灰岩、玄武岩、含层面的凝灰岩与玄武岩采样的基础上，开展了巴西劈裂实验、单轴压缩试验、直剪试验，获得了相应的岩石力学参数及相关岩石的应力－应变关系曲线，从而为深入研究凝灰岩与玄武岩互层隧道围岩的力学特性提供了技术支持。
展开▼
