期刊论文

Soil Settlements and Surrounding Structure Failure Mechanism due to Shield Tunneling in Metro Construction

中文

Dizhen Xuekan

1003-868X

2018

38

3

472-479

10.13409/j.cnki.jdpme.2018.03.010

国家留学基金（201508420221） 山区桥梁与隧道工程国家重点实验室培育基地项目（CQSLBF-Y14-9） 中铁十九局科技研发项目（2017-15）资助

本校为第一机构

地铁施工可能诱发临近结构失效,这是城市轨道交通建设安全施工与灾害防控的重点之一。基于实际典型工程,对地铁盾构施工引起的土体变形与周边结构失效机理进行研究。研究结果表明:①地铁盾构施工过程中,周边土体会产生显著变形,各环施工引起的土体沉降最大值为10.26cm,施工中应引起重视。②地铁施工引起的土体变形是诱发周边结构失效的主要原因之一,衬砌产生的最大应力为10.90MPa,小于C50混凝土抗压强度23.1 MPa,管片强度具有一定的安全储备;③最不利工况下,箱涵最大应力为4.62MPa,位于混凝土箱涵与砌体箱涵交接位置,可能诱发结构开裂;④左线开挖完成后,进行右线开挖时,箱涵最大应力位置向隧道右...

City metro construction may affect surrounding structures significantly.The structure failure mechanism due to tunnel shielding is one of the key points for promoting construction safety and preventing and controlling risks.Therefore,it is necessary to investigate the soil settlements and the failure mechanism of surrounding structures due to tunneling,based on a typical engineering project.The main conclusions are as follows：（1）The soil settlement due to metro shielding is significant;the maximum settlement is 10.71 cm during the shielding ...