摘要
通过对石家庄市某20.0 m深基坑桩锚支护结构的桩顶水平位移、深层水平位移和建筑物沉降的现场观测,探讨了支护结构位移与周边建筑物沉降的变化规律。观测分析结果表明:桩顶水平位移整体分布表现出明显的空间效应,阳角位置大,阴角位置小,同一支护边长范围内的水平位移中间大,边角小;支护桩深层水平位移呈鼓肚状,表现为中间大,顶部次之,底端最小的分布特征;建筑物沉降随基坑开挖逐渐增大,最后趋于稳定,沉降速率表现出前期小,中期大,后期稳定的变化特点。现场观测结果表明,该基坑支护结构的设计方案能有效控制变形,满足规范要求,可为类似工程提供参考与借鉴。
Based on field observation of a deep foundation in Shijiazhuang,the horizontal displacement of pile top,deep horizontal displacement and building settlement are carried out,the regularity for retaining structure displacement and building settlement are discussed. The field observations show that steric effect of the horizontal displacement of pile top in general,the displacement is large in external corner,small in internal corner,it is also large in the middle of supporting edge,small in the two ends of supporting edge; The piles are swollen,the maximum deep horizontal displacement happens in the middle of pile,the minimum happens in the bottom; The building subsidence increases gradually as excavating the foundation pit,and keep stable at the end. The rate of settling is slow at the beginning,faster in the middle,stable at the end. The result of the monitoring confirms that the supporting structure can control the deformation effectively,and meet the requirements of specification,which can provide reference for similar engineering.
出处
《地下空间与工程学报》
CSCD
北大核心
2015年第S2期826-831,共6页
Chinese Journal of Underground Space and Engineering
关键词
深基坑
水平位移
建筑物沉降
现场监测
deep foundation,horizontal displacement,building settlement,field monitoring
