圆形坑道锚注支护理想弹塑性分析  

Ideal Elastic-plastic Analysis about Bolting-Grouting Support Design of Circular Tunnel

作　　者：汤永平[1] 胡毅夫[1] 夏春涛[1] 何艳梅[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《地下空间与工程学报》2009年第2期220-226,266,共8页Chinese Journal of Underground Space and Engineering

摘　　要：利用弹塑性力学经典力学模型,结合岩体力学知识,建立圆形坑道围岩和锚注支护力学分析模型,得到了圆形坑道围岩和锚注体弹塑性应力分布、塑性半径和弹塑性位移等与支护反力、原岩应力和岩体C、φ之间的相互关系。合理地考虑围岩与支护共同作用,推导得出了一系列支护结构的计算公式,对弹塑性岩体的圆形坑道稳定性分析与设计具有较强的实用和指导价值。Through using some classical mechanical models of elastic-plastic mechanics with rock mechanics knowledge, a mechanical analysis model of the surrounding rock and bolting grouting for the circular tunnel is established. The elastic-plastic stress distribution, the plastic radius and the elastic-plastic displacement of the surrounding rock and grouting body and their relationship with protections reaction, country rock stress and rock mass C, φ are obtained. Considering reasonably the joint work of the surrounding rock and the bolting grouting supports, the formulas for support structure calculation is deduced. It has strong practical and instruction value to stability analysis and design of the elastic-plastic circular rock tunnel.

关 键 词：岩石力学 坑道稳定性 锚注支护 

分 类 号：TU457[建筑科学—岩土工程]