摘要
预制矩形桩作为深基坑支护的围护结构,为实现基坑围护结构的装配化,通过对其力学性能的优化,设计相应的几何截面尺寸和配筋。以上海浦东新区2个相邻基坑支护为实例,采用PLAXIS有限元软件建立两相邻基坑开挖模型,模拟分析预制矩形桩在2个基坑相邻同步开挖时对土体沉降、坑底隆起的影响及其水平位移。模拟及监测结果表明:预制矩形桩围护结构对上海软土地区相邻基坑中基坑变形的控制效果较好。
The prefabricated rectangular pile is used as the supporting structure of the deep foundation pit support,which realizes the assembly of the foundation pit surrounding structure.By optimizing its mechanical properties,the corresponding geometric cross-sectional dimensions and reinforcement are designed.Taking the support of two adjacent foundation pits in Shanghai Pudong New District as an example and establishing the excavation model of two adjacent foundation pits by the PLAXIS finite element software,the effect of soil settlement,pit bottom uplift and its horizontal displacement are simulated and analyzed.The monitoring result shows that the prefabricated rectangular pile enclosure structure has a good control effect on the deformation of the foundation pit in the adjacent foundation pit in Shanghai soft soil area.As a form of assembled foundation pit enclosure structure,it is worthy of popularization and application.
作者
陈晨
刘全林
CHEN Chen;LIU Quanlin(College of Civil Architecture,Anhui University of Science and Technology,Huainan 232001,China;Shanghai Qiangjin Foundation Engineering Co.Ltd,Shanghai 201800,China)
出处
《黑龙江工程学院学报》
CAS
2021年第1期39-44,共6页
Journal of Heilongjiang Institute of Technology
关键词
矩形桩
基坑围护
理论设计
数值模拟
rectangular pile
foundation pit support
theoretical design
numerical simulation
