联络通道施工盾构管片力学行为研究  

Mechanical behaviors of shield tunnel segments due to construction of connecting passages

作　　者：刘军[1] 贺美德[2] 宋旱云 

机构地区：[1]北京建筑大学,北京100044 [2]北京市市政工程研究院,北京100038

出　　处：《岩土工程学报》2013年第S2期271-275,共5页Chinese Journal of Geotechnical Engineering

基　　金：北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20130512);北京市自然科学基金项目;北京市教育委员会科技计划重点项目(KZ20131001601)

摘　　要：应用数值模拟计算方法对北京地铁某盾构隧道联络通道施工中管片的力学行为进行研究,介绍了联络通道的一般施工方法及施工工序,通过对联络通道施工中管片的力学行为进行现场监测分析和三维有限元数值计算分析,得到了联络通道施工过程中及管片开洞后管片的的受力特征和位移特性,研究结果表明:联络通道施工时,管片开洞后,盾构管片产生向联络通道方向移动的水平附加位移。由于联络通道的施工,原有的受力方式发生了应力重分布,开洞侧大部分既有管片会产生受拉的不利受力形式,将严重影响盾构隧道的安全,为此提出了盾构隧道管片的临时支撑加固措施。该研究对类似工程的设计和施工提供了理论依据。Numerical simulation analysis method is empoyed to study the mechanical behaviors of segments of connecting passage of a shield tunnel. The general construction method and process of the connecting passage are introduced. Through field monitoring analysis and three-dimensional finite element analysis, the force and displacement characteristics of the get the contact channel, segments during construction of the connecting passage and after hole-opening are obtained. The results show that during: construction of the connecting passage and after hole-opening, the horizontal additional displacement of the shield segments is generated, towards the direction of the connecting passage. Owing to the construction of the connecting passage, the original forces of the segments lead to stress redistribution of the Most of the segments at the side openings will produce negative tension forces, and it will seriously affect the safety of the shield tunnel. To this end, temporary support reinforcement measures for the shield tunnel segments are proposed. This study has the reference value for similar projects.

关 键 词：地铁 联络通道 施工 盾构管片 三维数值模拟 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]