摘要
以某紧邻幼儿园围墙的建筑深基坑施工为例,阐述了型钢水泥土搅拌墙+斜抛撑组合形式的应用要点。实践证明,型钢水泥土搅拌墙+斜抛撑组合形式造价相对较低,且能提供足够的刚度满足基坑变形要求。为控制基坑变形,同时兼顾施工进度,斜抛撑施工宜采用一次安装2根的方案,且一次施工量沿基坑边缘方向长度不宜超12 m,而局部暗浜区域或软弱土层的斜抛撑宜缩小工作面,保守开挖。
Taking the deep foundation pit construction of one building close to the wall of a kindergarten as an example,this paper expounds the application points of the combined form of section steel cement-soil mixed wall and inclined bracing.The practice shows that the cost of the combined form of section steel cement-soil mixed wall and inclined bracing is relatively low,and it can provide enough stiffness to meet the deformation requirements of foundation pit.In order to control the deformation of the foundation pit and take into account the construction progress,the scheme of installing two pieces of inclined bracing at a time should be adopted,and the length of one-time construction along the edge of the foundation pit should not exceed 12 m,while the working face should be reduced and the excavation should be conservative for the inclined bracing in local dark creek area or soft soil layer.
作者
顾彬
GU Bin(Shanghai Pudong New Area Construction(Group)Co.,Ltd.,Shanghai 201206,Chian)
出处
《建筑施工》
2021年第9期1719-1720,1732,共3页
Building Construction
关键词
斜抛撑
型钢水泥土搅拌墙
基坑围护
变形控制
inclined bracing
section steel cement-soil mixed wall
foundation pit support
deformation control
