两郧断裂带十漫高速公路隧道围岩稳定性研究  

Stability of surrounding rock mass for tunnel of Shiman highway in Liangyun fault

作　　者：刘豆豆[1,2] 陈卫忠[2] 杨建平[2] 于洪丹[2] 

机构地区：[1]山东财政学院工商管理学院,济南250014 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《哈尔滨工业大学学报》2009年第6期191-193,212,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金重大资助项目(90510019);国家自然科学基金资助项目(50579087)

摘　　要：应用非线性有限元法和施工过程力学的基本原理,研究十漫公路隧道的开挖、支护的原理,根据两陨断裂带的岩体特征,采用分步加载和荷载释放的原理,对隧道的整体稳定性以及围岩和支护结构的受力特征进行了详细分析.由数值模拟结果可知:隧道环向处产生应力集中,且初次衬砌和二次支护结构应力较大;局部断裂破碎带对二道垭隧道的影响较大.因此需要在施工中采用合理的开挖支护方法,确保隧道的施工期及正常运营期的稳定性.The nonlinear finite element method and construction process were used to research the principle of excavation and supporting for the tunnel of Shiman highway. According to the rock property of the Liangyun fault, the theory of loading in steps and load release was used to analyze the integral stability of the tunnel and mechanical behaviors of the surrounding rock mass and supporting structure. Numerical simulation results show that the circumferential directions of tunnel have stress concentration, and the stress of initial lining and secondary supporting structure is large. Partial fracture zone has a great impact on Erdaoya tunnel. Thus reasonable methods for excavation and support should be adopted to ensure the stability of tunnel in the construction period and the normal operating period.

关 键 词：两陨断裂带 隧道 开挖 支护 

分 类 号：TU457[建筑科学—岩土工程]