盾构隧道管片衬砌结构稳定性风险分析  

Study on Risk Assessment of Structure Stability in Shield Tunnel

作　　者：胡志平[1] 冯紫良[1] 刘学山 陈枫[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]广州市建设委员会科技委,广东广州510000

出　　处：《同济大学学报（自然科学版）》2004年第5期596-600,共5页Journal of Tongji University:Natural Science

基　　金：上海市重点学科建设资助项目

摘　　要：从基于敏感度分析的风险因子识别入手 ,重点讨论了盾构隧道管片衬砌结构稳定性风险分析的梁 -弹性铰-地基系统结构分析计算简图、风险评估矩阵和基于一次二阶矩法的灾害事件失效概率的计算 ,提出了盾构隧道管片衬砌结构稳定性风险分析的基本思路和整体框架 (RAST法 ) 。A risk assessment method of structural stability in shield tunnel is proposed.The identification of risk factors is firstly put forward based on the sensitivity analysis,while,a novel beam-hinge-foundation model is adopted for structural calculation.The failure probability is computed by using first order second moment (FOSM) with its correlating software development of the finite element program risk assessment of structural stability in shield tunnel (RAST),and risk assessment matrix is then used for the evaluation of structural stability in shield tunnel.Finally,an example is given with detailed discussion of the techniques and main steps of the risk assessment.

关 键 词：风险分析 盾构隧道 管片衬砌 梁铰地基系统模型 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]