某地下电站厂房围岩稳定性及锚固效应研究-中国科技论文在线.pdfVIP

第24 卷第4 期 岩 土 力 学 Vol.24 No.4 2003 年8 月 Rock and Soil Mechanics Aug. 2003 文章编号：1000－7598 －(2003) 04―0510―04 某地下电站厂房围岩稳定性及锚固效应研究 1,2 1 2 1 李术才 ，陈卫忠 ，朱维申 ，邱祥波 （ 1. 中国科学院武汉岩土力学研究所 岩土力学重点实验室，武汉 430071 ； 2. 山东大学 岩土与结构工程研究中心，济南 250061 ） 摘 要：某地下电站厂房围岩属于一种断续节理裂隙切割的节理岩体，其围岩采用了锚杆、锚索加固。作者采用三维断续节 理岩体的弹性损伤本构模型、损伤演化方程及损伤岩锚柱单元支护模型分析围岩加固前后的稳定情况，结果表明，能较好地 反应围岩的渐近破坏过程和锚杆（索）的加固效果。这些理论成果对设计有参考价值，并对工程实践有指导意义。 关 键 词：断续节理岩体；损伤演化；损伤岩锚柱单元；本构模型 中图分类号：TU 457 文献标识码：A Study on stability and anchoring effect of jointedrock mass of an underground powerhouse 1,2 1 2 1 LI Shu-cai , CHEN Wei-zhong , ZHU Wei-shen , QIU Xang-bo ( 1. Key Laboratory of Rock and soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Rock and Soil Mech. Research Center, Shandong University, Jinan 250061, China ) Abstract: The surrounding rock mass of an underground powerhouse under the three Gorges right bank is one kind of jointed rock mass cut by discontinuous joint. Several kinds of bolts and tendons are used to reinforce surrounding rock mass for reducing the damage evolution zones of joints and confining deformation of the surrounding rock mass. According to the theory of self-consistence and the energy generated in the process of sub-cracks propogation, 3D elastic -plastic fracture-damage constitutive model and damage evo lution equation are derived. Furthermore, a damage cylindrical element model for calculating anchoring effect is develo