双轮搅深层搅拌墙在深基坑支护工程中的应用实例分析  

Application of double-wheel cutter milling and deep mixing wall in deep foundation pit project

作　　者：郑自斌[1] ZHENG Zibin(Fujian Province Institute of Architectural Design and Research,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院,福建福州350001

出　　处：《福建建筑》2023年第4期84-88,共5页Fujian Architecture & Construction

摘　　要：以福州某超深、大面积的深基坑工程为例,针对邻近河流且需进行大幅度承压水抽降的基坑工程,研究采用双轮搅深层搅拌墙代替传统的水泥搅拌桩、地下连续墙止水帷幕的降水控制措施。采用有限差分法,进行基坑降水影响的数值模拟,分析降水对周边地面沉降的影响,并与基坑监测结果进行对比分析。结果表明,采用双轮搅深层搅拌墙止水帷幕取得良好的止水效果,较好地保护了工程周边环境,且经济性较地下连续墙好,可为其他类似工程提供参考。This paper takes an ultra-deep and large area deep foundation pit project in Fuzhou as an example,specific the foundation pit project which is adjacent to the river and needs to carry out large scale confined water pumping,the paper studies the precipitation control measures of using double wheel deep mixing wall instead of the traditional cement mixing pile and diaphragm wall water curtain.The finite difference method is used to simulate the influence of dewatering on the foundation pit,and the influence of dewatering on the surrounding ground settlement is analyzed.The results are compared with the monitoring results of the foundation pit.The results show that double-wheel cutter milling and deep mixing wall water stop curtain achieves good water stop effect,protected the surrounding environment of the project,and the economy is better than that of the underground continuous wall.It can provide a good reference for other similar projects.

关 键 词：深基坑 CSM工法 止水帷幕 降水分析 基坑监测 

分 类 号：TU473[建筑科学—结构工程]