摘要
在分析盾构法隧道引起地表变形原因的基础上 ,指出隧道围岩参数及盾构掘进对岩土体的扰动都具有很大的随机性 ,因而导致地表变形具有不确定性。利用ANSYS有限元程序进行数值模拟试验取得地表变形数据 ,在此基础上设定主要影响因素为随机输入变量 ,地表变形为随机输出变量 ,采用蒙特卡洛方法模拟出地表变形的统计值 ,并计算了失效概率及可靠度 。
The paper points out, based on the analysis of causes for ground surface deformation induced by shield tunnel, that the parameter of tunnel rock and shield excavation will cause disturbance to rock mass with great randomness, thus result in the uncertainty of surface deformation. ANSYS finite element program was used for numerical simulation test to obtain deformation data, and on the basis of which, primary impact element was defined random input variate, and surface deformation was defined random output variate. Monte-Carlo method was used to simulate the statistics of surface deformation, and a computation of probability of failure and degree of reliability was conducted.
出处
《铁道标准设计》
2004年第6期71-74,共4页
Railway Standard Design
