双线盾构地铁隧道穿越采空区引起拱顶沉降影响因素分析  

Analysis of factors affecting arch crown settlement caused by double line shield tunnel crossing gob area

作　　者：陈熙 曹伟杨 于洪彪 白丽扬 王玉东 于典 CHEN Xi;CAO Weiyang;YU Hongbiao;BAI Liyang;WANG Yudong;YU Dian(School of Civil Engineering,Qingdao University of Technology,Qingdao Shandong 266525,China;CCCC Tunnel Engineering Company Limited,Nanjing Jiangsu 211100,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266525 [2]中交隧道工程局有限公司,江苏南京211100

出　　处：《现代城市轨道交通》2024年第12期89-96,共8页Modern Urban Transit

基　　金：国家自然科学基金(52171264)。

摘　　要：在双线盾构地铁隧道施工过程中,当穿越采空区段时,由于采空区的重新活化,导致拱顶沉降量相较于无采空区的情况更为严重。为探究引起拱顶沉降的主要影响因素及其主次关系,文章依托广州地铁12号线工程,运用FLAC3D数值模拟软件进行模拟分析。在研究过程中,重点聚焦对采空区埋深、厚度、长度3项影响因素的分析,并得出诸多规律性结论。其中影响因素的主次关系为:埋深最为关键,长度次之,厚度影响最小。该研究成果可应用于实际工程项目,尤其在建设隧道过程中针对某项重点处理环节,为其提供重要参考。During the construction of double line shield metro tunnel,when passing through the gob area section during construction,and due to the reactivation of the gob area,the settlement of the arch crown is greater than that without the gob area.To explore the principal influence factors causing arch crown settlement and their primary and secondary relationships,this article relies on the Guangzhou metro line 12 project and uses FLAC3D numerical simulation software for hypothetical simulation.During the process of the research,the focus is on analyzing the three influencing factors of gob area burial depth,thickness and length,and draws many principal conclusions.The primary and secondary relationships between the influencing factors is:the depth of burial is the most critical,followed by the length,and finally the thickness.The research results can be applied to practical engineering projects,especially in the key processing link during the construction of tunnel,providing important reference value for the construction of double line shield tunnel.

关 键 词：地铁 双线盾构隧道 采空区 影响因素 

分 类 号：U455[建筑科学—桥梁与隧道工程]