桩帽对CFG桩复合地基的影响

Influence of Pile Cap on CFG Pile Composite Foundation

结合武汉智能网联汽车测试场项目,以理论分析和数值计算为手段,比较分析了有桩帽的CFG桩与无桩帽的CFG桩复合地基的变形及受力的差异,进而分析了桩帽的尺寸及强度对复合地基以及桩间土的影响。研究结果表明:桩帽改变了复合地基桩及桩间土的受力和变形;桩帽的尺寸越大,桩顶的位移越大,桩间土的位移越小;桩帽的强度越大,桩顶位移及桩间土的位移越小,当桩帽强度等级大于C30时,桩帽强度的影响力变小。

Combined with the project of Wuhan intelligent network vehicle test site,by means of theoretical analysis and numerical calculation,the deformation and stress differences of CFG pile with pile cap and CFG pile composite foundation without pile cap were compared and analyzed,and then the influence of the size and strength of pile cap on composite foundation and soil between piles was analyzed.The results show that the pile cap changes the stress and deformation of composite foundation pile and soil between piles.The larger size of pile cap will result in the greater displacement of pile top and the smaller displacement of soil between piles.The greater strength of pile cap will result in the smaller displacement of pile top and soil between piles.When the strength grade of pile cap is greater than C30,the influence of pile cap strength becomes smaller.