非贯通节理岩体抗剪强度影响因素分析

Analysis of Influence Factors on Shear Strength of Non-Penetration Jointed Rock Mass

基于修正的Lajtai岩桥破坏理论,研究连通率、形貌节理起伏角、法向压力等因素对非贯通节理岩体抗剪强度的影响,利用人工混凝土模拟类岩石材料,并进行直剪实验论证.结果表明:非贯通节理岩体抗剪强度与起伏角大小成正相关关系,与连通率成负相关关系;其他影响因素相同时,法向压力越大,非贯通节理岩体抗剪强度越大.

Based on the modified Lajtai rock bridge failure theory,the influence of connection rate,topographic joint undulation angle,normal pressure et al.on shear strength of non-penetration jointed rock mass is studied.Using artificial concrete to simulate the rock,the direct shear experiment is conducted.The result shows that：the shear strength of non-penetration jointed rock mass is positively correlated with the undulation angle,but is negatively correlated with the connection rate;under the same other factors,the normal pressure is positively correlated with the shear strength of non-penetration jointed rock mass.