地铁隧道开挖引起临近地下管线竖向位移及内力分析  

ANALYSIS OF VERTICAL DISPLACEMENT AND INNER FORCES IN BURIED PIPELINES CAUSED BY METRO TUNNELING

作　　者：范德伟[1] 李大勇[2] 张学臣[2] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092 [2]山东科技大学土木建筑学院,青岛266510

出　　处：《工业建筑》2009年第9期85-89,共5页Industrial Construction

基　　金：山东科技大学科技发展基金资助项目(059001)

摘　　要：基于Winkler弹性地基梁理论,分析地下管线在地铁开挖作用下的受力情况,推导考虑硬化地基扩散作用因素影响的地下管线位移表达式、转角表达式、弯矩表达式和剪力表达式,并定量分析地下管线变形与地基扩散角、埋深等因素间的关系。理论分析表明:地下管线的最大位移在沉陷区的中间,最大弯矩和最大剪力发生在沉陷区的边缘;地基扩散角与管线的埋深对管线的最大沉降量有较大影响。分析结果为工程实践中确定管线的加固位置提供了理论依据。The research is carried out in this paper about the effect of metro tunneling on the nearby underground pipeline. First of all, based on the elastic theory of Winkler＇s elastic beam, the equations for displacements of underground pipeline, rotation of underground pipeline, bending moment of underground pipeline, and shearing force of underground pipeline are established. Secondly, based on the proposed theories by authors, a ease history is analyzed. Finally, the relationships such as he diffusion angle of the subgrade, and buried depth of the underground pipeline are obtained. According to the research, the maximum settlement of the underground pipeline is located in the pipeline＇ s middle span of the settlement area, otherwise the maximum the bending moment of the underground pipeline and the maximum shearing force of the underground pipeline are located on the edge of the settlement area. The influence of the diffusion angle of the subgrade and the buried depth of the underground pipeline plays an important role.

关 键 词：地表沉陷 弹性地基梁 地下管线位移 地下管线的应力 地基扩散角 

分 类 号：TU990.3[建筑科学—市政工程] TU433