摘要
为研究强夯碎石桩联合CFG桩复合地基进行地基处理的效果,在对工程背景和地质情况分析的基础上,分析了强夯碎石桩联合CFG桩复合地基的加固机理,并利用PLAXIS 3D有限元软件建立简化的三维模型,对地基处理后不同荷载作用下仓储场地地坪结构层的沉降和差异沉降情况进行了计算。结果表明:强夯碎石桩联合CFG桩复合地基较单一桩型复合地基处理效果明显提高;采用强夯碎石桩联合CFG桩复合地基对软弱土层进行处理能够较好的满足单位距离差异沉降小于1 mm/m的工程要求;地基处理后的最大沉降和最大差异沉降与上部荷载的线性关系表达式可用于预测地基处理后的不同荷载作用下地坪结构层的沉降和差异沉降情况。
In order to study the treatment effect of composite foundation with dynamic compacted gravel pile and CFG pile on soft ground, based on the analysis of engineering background and geological conditions, the strengthening mechanism of the composite foundation of dynamic compaction gravel pile combined with CFG pile was analyzed. Then the finite element software PLAXIS 3 D was adopted to establish a simplified three-dimensional model, settlement and differential settlement of ground floor structure layer was calculated after the foundation treatment under different loading warehouse. The results show that the composite foundation of dynamic compacted gravel pile combined with CFG pile is more effective than that of single pile. It is shown that the composite foundation with dynamic compacted gravel pile and CFG pile can meet the engineering requirement of unit distance differential settlement less than 1 mm/m. The linear relationship between the maximum settlement and differential settlement after foundation treatment and the upper load can be used to predict the settlement and differential settlement of floor structure under different loads after foundation treatment.
作者
曾华健
潘忱
ZENG Huajian;PAN Chen(Jiangsu Geotechnical Engineering Co.,Ltd.,Nanjing,Jiangsu 210009,China)
出处
《水利与建筑工程学报》
2020年第1期64-69,共6页
Journal of Water Resources and Architectural Engineering
关键词
强夯碎石桩
CFG桩
复合地基
有限元
沉降
dynamic compacted gravel pile
CFG pile
composite foundation
finite element
settlement
