盾构隧道管片弯矩分布特性数值模拟分析  

Numerical Simulation Analysis of Bending Moment Distribution Characteristics in Shield Tunnel Segment

作　　者：李守巨[1] 李浩[1] 上官子昌[2] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连海洋大学海洋与土木工程学院,辽宁大连116204

出　　处：《安徽理工大学学报（自然科学版）》2016年第1期1-5,共5页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家重点基础研究发展计划资助项目(2015CB057804);国家自然科学基金资助项目(51105048;51209028);工业装备结构分析国家重点实验室开放基金资助项目(S14206)

摘　　要：为了研究盾构隧道衬砌内力分布规律,对盾构隧道设计中常用的三种衬砌内力计算方法进行了归纳和分析。基于土力学理论土压力的计算方法,提出了计算管片内力分布新的荷载-结构模型。以沈阳地铁盾构隧道为例,比较分析了惯用法、有限元法以及荷载-结构计算方法的区别。计算结果表明,不同的计算方法得到的弯矩分布特性存在一定的差异。采用有限元数值模拟方法,分析了土体泊松比对盾构隧道管片弯矩的影响。研究表明,随着土体泊松比的增加,管片最大弯矩值减小。In order to study the distribution of internal force of shield tunnel lining,three kinds of computational procedures for calculating bending moment distribution in segments of shield tunnel were summarized and analyzed. A new loading- structure method for calculating the distribution characteristics of bending moment was proposed based on soil pressure calculation method with the soil mechanics principles. Taking the shield tunnel in Shenyang Metro as an example,the difference of bending moment distribution calculated with the common method,finite element method and loading- structure method were compared. The computational results showed that there are some differences for bending moment distribution calculated with different computational methods.By using finite element method,the influence of the coefficient of earth pressure at- rest on bending moment distributions was simulated. The results showed that the maximum moment on segment decreases with increase of the coefficient of earth pressure at- rest.

关 键 词：盾构隧道管片 土压力 土力学 弯矩 土体泊松比 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]