隧道围岩稳定分析的最小安全系数法  

Minimum safety factor method for stability analysis of surrounding rockmass of tunnel

作　　者：李树忱[1] 李术才[1] 徐帮树[1] 

机构地区：[1]山东大学土建与水利学院城市地下空间系,济南250061

出　　处：《岩土力学》2007年第3期549-554,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金重点项目(No.50539080);山东省自然科学基金面上项目(No.Y2006F13)

摘　　要：关于岩体稳定评判准则至今尚未达到成熟的阶段,从稳定的定义至量化的标准等一系列基本问题尚未形成明确的体系。目前主要利用塑性区或位移扰动区来判断围岩的稳定范围。根据弹性理论,借助工程中安全系数的概念,利用Mohr-Coulomb和Drucker-Prager强度准则,建立基于单元的安全系数法,通过FLAC3D中的FISH语言实现了其求解过程。通过求解围岩稳定的安全系数,建立了评价围岩稳定的量化指标,给出了围岩稳定的安全范围,为锚固支护提供合理的支护参数。The judgment criterions of the rock mass stability have not arrived at round phase. A series of basic problems have not formed the code for design about the judge rule of the rockmass stability from the definition of stability to the quantitative standard. The range of the stability of surrounding rockmass can be defined by the plastic zone or the displacement changing zone at present. By using the elasticity theory and basic idea of the safety factor in the engineering, the paper develops a new safety factor method based on the element by the Mohr-Coulomb and Drucker-Prager rule. The safety factors are solved by FISH in the FLAC^3D. The quantity standard and the safety range of the rockmass stability are developed by the safety factor for the provided reasonable supporting parameter in the reinforced engineering.

关 键 词：隧道 安全系数 围岩稳定 FLAC^3D FISH语言 

分 类 号：U451[建筑科学—桥梁与隧道工程]