某地铁明挖基坑事故原因分析及处理方法  

Analysis and Treatment on an Accident of Some Deep Metro Foundation Excavation

作　　者：胡长明[1] 周正永[1] 刘金果[2] 常涛[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国中铁一局集团有限公司,陕西西安710054

出　　处：《施工技术》2009年第9期30-32,共3页Construction Technology

摘　　要：深基坑工程是地铁施工的重点和难点。以某地铁车站深基坑施工中出现的突发地质事故及相应处理为例,从设计、施工、监理以及第三方监测等方面综合分析事故原因,并详细介绍了增加挡淤围堤、降低场坪标高、搅拌桩咬合地基加固、补桩、加密支撑及完善监测方案等处理措施。监测结果证明,处理后基坑桩顶水平位移和桩身位移相对稳定,桩身质量良好。Deep foundation excavation project is the focus and difficulty of metro construction. Taking an accident and corresponding treatment of a deep metro foundation excavation for example, authors analyze the causes of the accident synthetically from design, construction, supervision and third party monitoring. Besides, they also present main treatments in detail, including setting border dike to retain silt, lowering field elevation, reinforcing foundation with mixing piles, increasing bored piles and supports, as well as perfecting monitoring scheme. Monitoring results show that horizontal displacement at top of piles and pile inclination are stable after reinforcement, and pile quality is well controlled.

关 键 词：地铁 基坑坍塌 淤泥地层 围护桩 监测 

分 类 号：U455.45[建筑科学—桥梁与隧道工程] TU753.8[交通运输工程—道路与铁道工程]