浅覆大直径越江盾构隧道施工阶段管片上浮分析及控制措施研究  

Study on Segment Floating and Its Control Measures During Construction of Large-diameter Cross River Shield Tunnel with Shallow Covering

作　　者：曾学艺 梁禹[2] 李科[3] 阳军生[4] 

机构地区：[1]长沙市城投基础设施建设项目管理有限公司,湖南长沙410000 [2]中山大学工学院,广东广州510006 [3]中铁隧道集团有限公司,河南洛阳471009 [4]中南大学土木工程学院,湖南长沙410000

出　　处：《铁道建筑》2017年第5期71-75,共5页Railway Engineering

基　　金：广东省科技计划(2015A020217004);广东省交通运输厅科技项目(2016-02-026)

摘　　要：大直径越江跨海盾构隧道修建过程中,普遍会发生上浮现象,且往往伴随着管片破损、错台,直接影响隧道施工安全。本文依托长沙南湖路湘江隧道工程,结合现场施工情况和监测数据,对浅覆大直径盾构隧道施工阶段管片上浮原因进行了分析。基于监测结果,从改善上覆土特性、同步注浆优化、控制掘进参数、管片上浮处理等方面提出了有针对性的上浮控制措施,并在后续盾构掘进施工过程中得到了成功运用,有效控制了管片上浮的发生。The floating phenomenon always happened during the construction of cross river or sea tunnel with large-diameter,accompanied with segments damage and dislocation,which would directly effect the safety of tunnel construction. Taking the Changsha Nanhu Road Xiangjiang cross river tunnel project as background,the mechanismoflarge-diameter segments floating during construction were analyzed by combination the site conditions and monitoring data. Based on monitoring data,some floating-control measures were proposed,such as improvement of overlaying soil characteristics,synchronous grouting,driving parameters control and segments floating treatment. The measures were successfully adopted during the subsequent shield driving and prevented the segments floating happening again.

关 键 词：水底隧道 盾构施工 管片上浮 控制措施 现场监测 浅覆土 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]