大跨度公路隧道围岩长期稳定性反分析  

Back analysis on stability of surrounding rock in big-span road tunnel

作　　者：陈殿强 郝哲 于永江[2] 王振伟[2] 王来贵[2] 

机构地区：[1]辽宁有色勘察研究院,辽宁沈阳110013 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第6期866-869,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50774046);交通部重点科技攻关资助项目(2002-353 32 07)

摘　　要：为揭示大跨度隧道的围岩长期稳定性规律,采用理论分析与实测数据相结合的方法,推导了适宜的理论方程及经验公式,据现场监测数据,利用简化的几何及力学模型,进行围岩物性参数的反分析解析计算,据此,得出围岩的应力和位移分布规律,进行围岩长期稳定性分析。研究结果表明:所建立的解析计算方法简便、实用,可得出围岩处于稳定工作状态的结论,为现场隧道提供了有益参考。In order to reveal the long-term stability characteristics of surrounding rock in a big span road tunnel,this study has derived theoretical equations and practical formulas for surrounding rock stability using theoretical analysis and measured data.On the basis of measured data,simplified geometry and mechanical models,the back analysis on the physical and mechanical parameters of surrounding rock was conducted.Therefore,the distribution of stress and displacement of surrounding rock was obtained for rock stability analysis.The study results show that this analytical calculation method is simple,practical and can derive the stability state of surrounding rock.It provides a useful reference for road tunnel analysis.

关 键 词：大跨度 隧道 围岩 最大似然法 面积等效 PTH模型 蠕变 反分析 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]