摘要
以广州某地铁项目为背景,提出了基坑围护桩基施工对下卧地铁矿山法隧道的锚杆和围岩的扰动;上部明挖基坑的开挖,导致下卧地铁隧道的隆降。为了研究基坑施工期间对下卧地铁隧道结构的影响,通过计算和数值分析,评估施工存在的风险,并采取了控制围护桩桩长和施工工艺、明挖基坑“分段、分层、先撑后挖”的原则控制地铁隧道变形,项目取得了良好效果。可为以后类似工程实施提供参考。
In the background of a subway project in Guangzhou,the disturbance of the anchor rod and surrounding rock in the tunnel.In order to study the impact of foundation pit construction on the structure of the underground subway tunnel,evaluate the existence of construction risks through calculation and numerical analysis,and adopt the principle of controlling the length of retaining pile and construction technology,digging the foundation pit“segmentation,stratification,first support before excavation”,the project has achieved good results.Can provide reference for the future implementation of similar projects.
作者
林启明
LIN Qiming(Guangzhou Development Zone Financial Investment Construction Project Management Center Guangzhou 510663,China)
出处
《广东土木与建筑》
2021年第11期66-69,共4页
Guangdong Architecture Civil Engineering
关键词
基坑
隧道
桩长
控制措施
数值分析
foundation pit
tunnel
pile length
control measures
numerical analysis
