基于损伤理论的圆形隧洞围岩应力场分析  

Stress Field Analysis of Circular Tunnel Surrounding Rock Based on Damage Theory

作　　者：马青[1] 赵均海[1] 魏雪英[1] 朱倩[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《建筑科学与工程学报》2011年第2期84-94,共11页Journal of Architecture and Civil Engineering

基　　金：陕西省自然科学基础研究计划项目(SJ08E204)

摘　　要：基于统一强度理论,考虑地下水渗流作用的影响,应用弹塑性损伤力学理论,根据不同的地应力情况,对施工工况下的圆形隧洞围岩进行应力和稳定性分析;通过算例分析了内摩擦角和粘聚力对围岩应力场和位移场的影响。研究结果表明:内摩擦角对围岩损伤半径、应力、位移有着比较显著的影响;粘聚力对围岩损伤半径、应力、位移的影响不太显著;所得结论具有广泛的适用性。Based on the unified strength theory,considering the impact of underground water seepage,using the elasto-plastic damage mechanics theory,according to different stress conditions,stress and stability analyses of circular tunnel surrounding rock under construction conditions were carried out.The effects of internal friction angle and cohesion on surrounding rock stress field and displacement field were analyzed through an example.The study results show that the internal friction angle has more significant impact on surrounding rock damage radius,stress,displacement;the cohesion has less significant on surrounding rock damage radius,stress,displacement.The conclusion has broad applicability.

关 键 词：统一强度理论 地下水渗流作用 隧洞围岩 岩石损伤 应力场 位移场 

分 类 号：TU457[建筑科学—岩土工程]