摘要
型钢水泥土搅拌墙支护方法合理的利用搅拌桩止水性能好和型钢能够承受内力的特点,具有相对经济、工期短、止水性强、对基坑周边环境影响小等特点。系统分析了佛山地区一直推广缓慢的原因,并对适用性进行分析。结合工程案例,分析了水泥土搅拌墙的截面弯矩、剪力及变形特性,利用解析法、理正基坑软件求解法及监测数据对比分析,结果表明,（1）三种方法求解的桩体位移及内力较为吻合,SMW工法具有较强的理论基础;（2）满足佛山地区淤泥砂层发育、1～2层基坑支护,能大幅节约造价、减少建筑垃圾污染和噪音影响的支护设计方案;（3）具有较强的经济、社会、环境效益,符合当前佛山市场的需求。
The Deep Excavation Support using Soil Mixed Wall（SWM）with Hot Rolled Steel Beam Method combines the advantage of seepage stopping of SWM wall and high bending resistance and receives a wide application in the urban foundation excavation projects.It has the features of cost effective,shorter construction periods,better seepage resistance and less impact to the adjacent environment.In addition to the suitable range,this paper investigates the reasons that this deep excavation support method has a slower application in Foshan region.In the case history,the bending moments,shear stress and deformation in the soil mixed columns were analyzed.Results from the analytical method in reference 6,numerical method using Lizheng commercial software and construction monitored data were compared.The following results can be concluded：1）the internal stresses obtained in three different approach are consistent indicating that both methods can characterize the performance of the SMW elements;2）this method can be applied in sandy peaty soft soils in Foshan region for deep excavation of one or two stories of underground spaces.This method has economical,social and environmental advantages and suit for the need of Foshan construction market.
作者
肖荣军
XIAO Rongjun(Guangdong Foshan Geology Bureau, Foshan 52800)
出处
《土工基础》
2018年第3期251-255,共5页
Soil Engineering and Foundation
关键词
佛山地区
SMW工法
基坑
受力特性
演化分析
Foshan Region
Soil Mixed Wall with Hot Rolled Steel Beam
Foundation Excavations
Stress Distribution
Analysis
