CFG桩复合地基现场荷载试验研究

通过现场荷载试验分析CFG桩单桩和复合地基承载力特性,研究褥垫层的作用机理,验证了采用振动沉管施工CFG桩来处理深厚超软地基是可行有效的。CFG桩单桩承载力取决于桩体和地基土强度,与桩间距关系不大;复合地基承载力与桩间距关系密切;对于超软地基而言,褥垫层不仅能保证桩土共同承载,调整应力分布,提高地基承载力,还能起到水平排水和促进地基固结的作用。设计和施工时应注重桩长和褥垫层的质量。

FIELD LOAD TEST OF CFG PILE COMPOSITE FOUNDATION

The bearing characteristis of CFG single pile and composite foundation was analyzed by site load test,the mechanism of the cushion was studied.It has been verified that using sinking pipe to construct CFG piles to treat a deep and soft ground is feasible.The bearing capacity of a single CFG pile is depended on pile shaft and subsoil strength.There is a close relation between the bearing capacity of a composite foundation and pile space.The pile length and quality of the cushion should be carefully considere...