摘要
针对软土地区基坑易变形、富含水的特点,以上海市黄浦区某基坑场地为例,基于场地工程地质特征进行支护方案设计,综合选取了钻孔灌注桩围护结合三轴水泥土搅拌桩止水的支护形式,并对支护方式进行稳定性验算及数值模拟分析。研究结果表明:分层开挖结合钻孔灌注桩+三轴水泥土搅拌桩止水的支护形式可以较好控制基坑变形程度,预测变形值均在规范的允许范围内,但在施工期间应加强监测工作。
Aiming at the characteristics of easy-deformation and water-rich pits in soft soils,took a pit excavation site in Huangpu district of Shanghai was taken as an example,the design of supporting schemes was based on the geological characteristics of site engineering,and a comprehensive selection of bored pile retaining and triaxial protection.The supporting form of water-stopped cement-soil mixing piles was used,and stability checking and numerical simulation analysis of the supporting methods were carried out.The research results showed that the support form of layered excavation combined with cast-in-situ bored piles and triaxial cement-soil mixing piles can well control the deformation of foundation pits.The predicted deformation values were within the allowable range of the specifications;however,monitoring should be strengthened during construction.
作者
林子晔
LIN Ziye(The Construction Engineering Quality Inspection Center of Kunshan,Kunshan Jiangsu 215300,China)
出处
《工程质量》
2018年第8期67-72,共6页
Construction Quality
关键词
软土基坑
基坑支护
灌注桩
基坑变形
soft soil foundation pit
foundation pit support
cast-in-place pile
foundation pit deformation
