软硬岩互层边坡稳定性的敏感性因素分析  

Analysis of Sensitivity Factors to Stability of Inter-beddings of Soft and Hard Rock Slope

作　　者：夏开宗[1] 陈从新[1] 鲁祖德[1] 宋娅芬[1] 周意超[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,武汉430071

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第4期729-732,736,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：西部交通科技项目(批准号:2009353342540);国家自然科学基金青年科学基金项目(批准号:41202225)资助

摘　　要：针对沪蓉国道主干线湖北宜昌至巴东高速公路上的顺层软硬岩互层边坡破坏特征,建立了顺层软硬岩互层边坡稳定性的分析模型.分析了层面强度、岩层厚度、岩层倾角、水力作用等各项因素对边坡稳定性的影响,探索软硬岩互层边坡稳定性的一些规律.结果表明:敏感度由大到小为:层面倾角>层面内摩擦角>层面厚度>边坡中水力作用>层面粘聚力,即层面倾角和软弱岩层面的强度参数(内摩擦角)对边坡稳定性起主要控制作用,岩层厚度对边坡的稳定性也有明显的影响,物理模型试验更加进一步验证了文中所得的各因素对软硬岩互层边坡稳定性影响的规律.An example taken from Yiba highway′s slope with inter-beddings of soft and hard rock,and the simulation model for analyzing the stability of inter-beddings of soft and hard rock slope is established.The stability sensibility of the inter-beddings of soft and hard rock slope to the influence factors,such as strength of the surface,thickness,inclination of rock stratum and hydraulic pressure,is analyzed.The results show that：sensitivity descending is inclination of rock stratum internal frictionthicknesshydraulic pressurecohesive force,that is the inclination of rock stratum and the strength parameters of the structural surface play a main control role to the stability of the inter-beddings of soft and hard rock slope;and the thickness has obvious influence on the stability of rock slopes.Physical model test further also demonstrates the rationality of stability regularity with interbeddings of soft and hard rock slope.The regularity can provide foundation for inter-beddings of soft and hard rock slope′s disposal technologies.

关 键 词：软硬岩互层边坡 稳定性 敏感性 

分 类 号：TU457[建筑科学—岩土工程]