摘要
文章以某软土地区地铁车站深基坑工程为例,通过现场监测总结该深基坑的变形规律,分析水泥土搅拌桩墙(soil mixing wall,SMW)工法桩围护下临近建筑物一侧的基坑变形特征,并结合数值模拟,对比有无SMW工法情况下的基坑变形差异,评估SMW工法的控制效果。结果表明,地连墙侧移呈“鼓腹型”,最大侧向变形和开挖深度之比为0.10%~0.20%,最大侧移所在深度位于开挖面下4 m和开挖面上7 m,且大部分出现在开挖面上1 m处。设置SMW工法桩能显著降低地连墙侧移和地表沉降,降幅达50%以上,可以较好地保护建筑物。
Taking a deep foundation pit project of subway station in soft soil areas as an example,this paper summarizes the deformation law of the deep foundation pit through on-site monitoring,analyzes the deformation characteristics of the foundation pit adjacent to the building side under the Soil Mixing Wall(SMW)pile enclosure,combines numerical simulation to compare the deformation difference of the foundation pit with or without SMW method,and evaluates the control effect of SMW method.The results show that the lateral displacement of the diaphragm wall is presented as"bulging"shape,and the ratio of the maximum lateral deformation to the excavation depth is 0.10%-0.20%,the maximum lateral displacement is located at the depths of 4 m below the excavation surface and 7 m on the excavation surface,and most of them appear at 1 m above the excavation surface.The setting of SMW method piles can signifi cantly reduce the lateral displacement and surface settlement of the diaphragm wall by more than 50%,which can better protect the buildings.
作者
杨湉
YANG Tian(Wuxi Metro Group Co.,Ltd.,Wuxi 214023,Jiangsu,China)
出处
《工程技术研究》
2025年第10期161-163,共3页
Engineering and Technological Research
关键词
软土基坑
SMW工法桩
水泥土搅拌桩墙
地连墙
地表沉降
soft soil foundation pit
SMW method pile
cement-soil mixing pile wall
diaphragm wall
surface settlement
