华东交通大学学报2025，Vol.42Issue(1)：45-51,7.
断层破碎带黏性夹泥岩体与基岩接触界面大型直剪试验研究
Large-Scale Direct Shear Test Study of Contact Interface Between Viscous Mud-Rock Mass and Bedrock in Fault Fracture Zone
摘要
Abstract
In order to understand the stability and deformation mechanism of tunnel through fault zone,and to provide theoretical basis for scientific analysis of tunnel excavation through fault fracture zone,a large-scale di-rect shear test was carried out on the contact surface between the viscous mud-rock mass and the bedrock with joint surface,and the influence of normal pressure,stone content and rock dip angle on the interface mechanical properties of the viscous mud-bedrock contact surface was studied.The test results show that:The interfacial stress-strain relationship shows softening characteristics at low normal stress,and gradually transitions from weak softening to weak hardening with the increase of normal stress;The normal stress is positively correlated with the initial tangential modulus of the interface.The shear strength and stiffness of the interface increase with the increase of stone content;Compared with the block angle of 0°,the interface strength corresponding to the rock angle of 90°is improved;The internal friction angle of the interface has a linear positive correlation with the stone content,and the cohesion path has a negative correlation.When analyzing the stability and deformation mechanism of tunnel crossing fault zone,it is necessary to fully consider the influence of interface normal stress,stone content and rock inclination angle on interface strength.关键词
断层泥/破碎带/土石混合体/直剪试验/基岩界面Key words
fault gouge/crushing zone/earth-rock mixture/direct shear test/bedrock interface分类
土木建筑引用本文复制引用
邹弈,朱碧堂,吴颖彪,周宇航..断层破碎带黏性夹泥岩体与基岩接触界面大型直剪试验研究[J].华东交通大学学报,2025,42(1):45-51,7.基金项目
国家自然科学基金项目(41972291) （41972291）
江西省教育厅科技项目(GJJ2205202) （GJJ2205202）
