摘要
通过有限差分软件FLAC3D建立高速公路软基段数值模型,分别改变CFG桩的桩间距及褥垫层厚度,分析桩土应力比变化规律,结果表明:(1)随着垫层厚度增大,桩土应力比逐渐减小,可将褥垫层厚度设置为40cm;(2)随着桩间距的增大,桩土应力比逐渐增大。得到的结果可为CFG桩加固该地区高速公路软基设计提供参考。
The numerical calculation software FLAC3D is taken to build the numerical calculation model for the highway with soft foundation,the spacing of CFG pile and cushion thickness are changed to study the discipline of pile-soil stress ratio,the calculation results show that,（1） with the increase of cushion thickness,the pile-soil stress ratio decreases gradually,the cushion thickness can be set to be 40 cm.（2） with increase of the spacing of CFG pile,the pile-soil stress ratio increases gradually.The obtained results can give guidance for the design of the highway with soft foundation reinforced by CFG pile.
出处
《公路》
北大核心
2011年第10期8-11,共4页
Highway
基金
江西省科技计划项目
项目编号2010BGB01302
江西省交通运输厅重点科技项目
项目编号2010C00013
2010C00014
关键词
桩土应力比
桩间距
褥垫层厚度
数值计算
pile-soil stress ratio
pile spacing
cushion thickness
numerical calculation
