强震区隧道衬砌作用力计算方法探讨  

Discussion on Calculation Methods for the Force of Tunnel Lining Strong Seismic Areas

作　　者：郝小红[1] 孙常新[1,2] 高峰[2] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]重庆交通大学,重庆400074

出　　处：《工程抗震与加固改造》2011年第6期23-27,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金资助项目(50678077);重庆市自然科学基金项目(CSTC;2008BB6066);重庆市教委科学技术研究项目(KJ090403);华北水利水电学院青年科研基金资助项目;重庆交通大学(桥梁)结构工程重点实验室开放基金资助项目

摘　　要：应用常规的数值法和解析法进行了强震区隧道衬砌作用力计算分析,通过对比分析发现常规方法存在一些问题,需要进行修正和改进。具体表现为:解析方法在具体使用中加力存在困难、解析和数值计算结果相差较大、对围岩类别的影响考虑不够、对隧道深浅埋的影响考虑不够。针对常规方法在强震区隧道衬砌作用力计算方面存在的问题,提出使用‘传力单元’来施加解析计算中荷载和通过对比修正来形成数值计算中初始应力场的方法,对常规计算方法进行了一些改进,采用改进后的方法进行强震区隧道衬砌作用力的计算得到比较满意的结果。The routine methods are used to calculate the force of tunnel lining in strong seismic areas;problems existed in routine methods are found by calculating,these problems need to be corrected and improved.The problems are as followings： first,the force is difficult to be inflicted by using analytical method;secondly,the difference is big between the results calculated by analytical method and numerical method;thirdly,the influence caused by surrounding rock classification is not being considered enough;fourthly,the influence caused by the distinction of deep tunnel and shallow tunnel is not being considered enough too.Aim at the problems lied in calculating the force of tunnel lining strong seismic areas by using routine methods,an improving method is presented,which includes a ＇passing force elements＇ to inflict force by using analytical method and another contrasting and improving means to forming initial tress field by using numerical method.This new method is an improvement to routine methods,and a satisfactory result can be get by using the new method to calculate the force of tunnel lining strong seismic areas.

关 键 词：衬砌作用力 强震区 常规方法 对比分析 改进方法 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]