砂土基坑开挖下临近地铁隧道变形与保护措施研究  

Research on Deformation and Protection Measures of Adjacent Subway Tunnel under Sand Foundation Pit Excavation

作　　者：曹洋[1] 崔洋 CAO Yang;CUI Yang(China Northeast Architectural Design&Research Institute Co.,Ltd.,Shenyang,Liaoning 110055,China;ZJDS Geotechnical Engineering Co.,Ltd.,Shenyang,Liaoning 110055,China)

机构地区：[1]中国建筑东北设计研究院有限公司,辽宁沈阳110055 [2]中建东设岩土有限公司,辽宁沈阳110055

出　　处：《山西交通科技》2023年第4期102-106,共5页Shanxi Science & Technology of Transportation

摘　　要：针对不同施工参数工况下,分别开展了基坑临近地铁隧道采用隔离桩及注浆加固措施的控制效果研究。主要结论如下:隔离桩桩顶埋深对地铁隧道的保护效果有较大影响,设计不当将会“牵引”隧道产生变形;随着注浆区域增加至一定宽度,注浆加固的保护效果将稳定在一定范围,而不会持续增加,一味加宽注浆区域并不能取得合适效果,适当控制注浆区域宽度也能够保证较好的控制效果。研究结论对砂土地区类似工程施工具有指导意义。Focusing on working conditions with different construction parameters,this paper studied the control effects of the isolation pile and grouting reinforcement on the foundation pit adjacent to the subway tunnel.Main findings were obtained.The buried depth of the isolation pile top had a great influence on the protection of the subway tunnel,and its improper design was possible to"pull"the tunnel to cause the deformation.As the grouting area increased to a certain width,the protection effect of the grouting reinforcement would be stable in a certain range without increasing continuously.So only widening the grouting area was not as good as properly controlling the width to achieve a good effect.The study results have a guiding significance for the construction of similar engineering in sandy areas.

关 键 词：砂土地层 基坑工程 地铁隧道保护措施 隔离桩 注浆加固 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]