岩土工程学报2024，Vol.46Issue(1)：101-109,9.DOI:10.11779/CJGE20221214
考虑刚度与强度劣化的洞室围岩弹塑性分析
Elastoplastic analysis of surrounding rock of caverns considering deterioration of stiffness and strength
摘要
Abstract
s:The stiffness and strength of the surrounding rock in underground caverns will deteriorate to a certain extent when it enters the plastic state.Based on the D-P yield criterion,the elastic-plastic solution for the anchored surrounding rock of deep-buried circular caverns is obtained considering the deterioration effects.The reliability of the method is verified by using the FLAC3D finite difference software,and the relevant influencing factors are analyzed.The results show that:(1)Considering the deterioration of the stiffness and strength of the anchored surrounding rock,the deformation of the surrounding rock is more realistic.(2)The residual cohesion c,the residual internal friction angle φ,the residual elastic modulus E have controlling effects on the anchorage plastic residual zone radius Rb and the wall displacement u.The larger the values of c,φ,E,the smaller the values of Rb and u,and vice versa.(3)The softening moduli Mc and Mφ have great influences on the radius Rb of the plastic residual zone and the wall displacement u,but the influences on the radius Rp of the plastic softening zone can be ignored.(4)Under the coordinated action of system bolt and support resistance pi,the scope of the plastic residual zone and the deformation of the surrounding rock can be effectively controlled.关键词
洞室围岩/刚度劣化/强度劣化/锚固效应/D-P准则Key words
surrounding rock of cavern/stiffness deterioration/strength deterioration/anchorage effect/D-P criterion分类
建筑与水利引用本文复制引用
张帅,王俊杰,张海龙,宋少贤,吴岱峰..考虑刚度与强度劣化的洞室围岩弹塑性分析[J].岩土工程学报,2024,46(1):101-109,9.基金项目
国家自然科学基金面上项目(52378327) （52378327）
重庆市建设科技计划项目(城科字 2022 第 8-12 号) （城科字 2022 第 8-12 号）
