摘要
为讨论并验证铁路隧道二次衬砌可靠度计算方法的准确性和可能存在的问题。文中介绍了衬砌截面功能函数表达式和所涉及的随机变量统计特征及计算方法;分别采用设计验算点法和JC法计算某隧道二次衬砌单元截面的可靠指标,并编写单元可靠指标和大、小偏心出现频次的显示程序,通过编写蒙特卡洛法的单元截面失效概率计算程序,直接统计各单元和整个衬砌的失效次数,并将3种方法得到的可靠指标进行对比。结果表明,分析验算点法和JC法的计算偏差主要原因为假定与抽样结果不一致。
The purpose of this paper is to discuss and verify the accuracy and possible problems of reliability calculation method for secondary lining of railway tunnel.Firstly,the functional expressions of lining section,the statistical characteristics of random variables involved and the calculation method are introduced.Then,the reliability index of the secondary lining element section of a railway tunnel is calculated by using the design checking point method and JC method respectively,and the program for displaying the reliability index of the element and the frequency of large or small eccentricity is written.Then,a program for calculating the failure probability of element section by Monte Carlo method is developed to calculate the failure times of each element and the whole lining directly,and the reliability indexes obtained by the three methods are compared.The results are presented and the main reasons for the deviation between the checking point method and JC method are analyzed,which is that the assumption is inconsistent with the sampling results.
作者
姜高勇
周甲强
王进
魏中华
张霖波
李斌
JIANG Gaoyong;ZHOU Jiaqiang;WANG Jin;WEI Zhonghua;ZHANG Linbo;LI Bin(Shandong Luqiao Group Co.,Ltd,Ji'nan 250021,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《交通科技》
2022年第6期77-82,共6页
Transportation Science & Technology
基金
国家自然科学基金(51608407)
山东省路桥集团研发项目(软弱围岩隧道洞周及掌子面施工安全控制技术)资助。
关键词
铁路隧道
可靠度
统计分析
二次衬砌
蒙特卡洛模拟
railway tunnel
reliability
statistical analysis
secondary lining
Monte Carlo simulation
