中南大学学报（自然科学版）2026，Vol.57Issue(2)：845-858,14.DOI:10.11817/j.issn.1672-7207.2026.02.028
考虑张开型节理倾角的修正岩体真三轴强度准则
Modified true triaxial strength criterion considering the dip angle of open-jointed rock mass
摘要
Abstract
In order to consider the influence of joint dip angle on true triaxial strength of rock mass,taking open jointed rock mass as the research object,based on three existing classical true triaxial strength criteria,and the correlation between cohesion,internal friction angle and joint dip angle was established,and then the modified true triaxial strength criterion of rock mass considering open jointed dip angle was put forward.On this basis,according to the indoor test and numerical simulation data,the prediction results of existing classical true triaxial strength criterion,the modified true triaxial strength criterion and the other two strength criteria considering rock joints were analyzed and compared,which verified the rationality of the modified true triaxial strength criterion.The results show that compared with the classical strength criteria,the prediction errors of the three modified strength criteria are greatly reduced,and the error percentage can be decreased by 236.95 percentage points.Among them,the modified MG-C criterion has the best prediction effect,followed by the modified MW-C criterion and the modified D-P criterion.In addition,the two existing strength criteria considering the joint of rock mass can not objectively reflect the influence of joint dip angle on the true triaxial strength of rock mass,and the maximum error percentage is 136.35%,so the prediction effect is not ideal.The modified true triaxial strength criterion of rock mass focuses on improving the strength parameters of rock mass in the original classical strength criterion,the true triaxial strength value of rock mass at any joint dip angle and stress state can be obtained only by carrying out a few true triaxial indoor tests,which has high accuracy,operability and predictability in practical engineering.The research results can provide theoretical guidance for stability and strength evaluation of jointed rock mass.关键词
岩体/强度准则/张开型节理/节理倾角/真三轴Key words
rock mass/true triaxial strength criterion/open joint/joint dip angle/true triaxial stress state分类
建筑与水利引用本文复制引用
冯帆,张彤,陈绍杰,朱泉企,苏晓丽..考虑张开型节理倾角的修正岩体真三轴强度准则[J].中南大学学报（自然科学版）,2026,57(2):845-858,14.基金项目
国家自然科学基金资助项目(52374095) （52374095）
山东省高等学校青创科技支持计划项目(2024KJH068) （2024KJH068）
山东省自然科学基金青年科学基金(B类)资助项目(ZR2025QB45)(Project(52374095)supported by the National Natural Science Foundation of China （B类）
Project(2024KJH068)supported by the Youth Innovation Team Science and Technology Support Program for Higher Education Institutions of Shandong Province （2024KJH068）
Project(ZR2025QB45)supported by the Natural Science Youth Science Foundation(category B)of Shandong Province) （ZR2025QB45）
