锚网喷联合支护隧道稳定可靠度的拟蒙特卡洛分析  

Analysis of Stability Reliability of Tunnel with Shotcrete Rockbolt Mesh Support via Quasi-Monte Carlo Method

作　　者：苏永华[1] 李伟[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《公路交通科技》2012年第1期109-113,127,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51078136);湖南省自然科学基金项目(09JJ3113);湖南省交通厅科技项目(200717)

摘　　要：基于地下结构力学围岩与支护相互作用原理及剪切滑移理论,建立了软质围岩隧道在锚网喷联合支护条件下的稳定功能函数。针对该功能函数的隐式特征,研究了基于超立方体中低偏点集和重要抽样方法的拟蒙特卡洛求解方法,并相应给出了明晰的分析操作程序,构建出完整的隧道锚喷网联合支护下稳定可靠度拟蒙特卡洛分析方法。避免经典蒙特卡洛求解时的效率低、计算费用高的缺陷。最后通过工程实例对比,表明了所提方法具有较高的精度和效率,展示了其实用性和可行性。The stability function of soft surrounding rock tunnel with shotcrete rockbok mesh support was established based on the principle of surrounding rock and support structure interaction and the shear sliding theory in underground structure mechanics. According to the implicit characteristic of this function, the quasi-Monte Carlo （QMC） method based on the low-discrepancy point set in hypercubes and the important sampling method was studied. The corresponding implicit analysis procedure was given, and the complete QMC reliability analysis method for tunnel with shotcrete roekbolt mesh support was obtained. This method shunned the defects of the Monte Carlo method such as low efficiency and tremendous expense. At last, the comparison of the outcomes of the method with the project case indicates the high precision and efficacy of this method.

关 键 词：隧道工程 锚喷网联合支护 拟蒙特卡洛法 低偏差抽样 可靠度 

分 类 号：U451[建筑科学—桥梁与隧道工程]