摘要
运用ABAQUS软件研究了寒区季节性冻土区,具有不同初始弹性模量桩体和不同褥垫层厚度的CFG桩复合地基在经历冻融循环后的荷载分担比、桩-土应力比及荷载-桩沉降曲线的规律。结果表明,冻融循环会降低桩体分担荷载,降低桩-土应力比并加剧地基沉降。具有相同褥垫层材料的CFG桩,褥垫层越厚,相同冻融循环后的桩-土应力比相差越小。文中结果可为寒区CFG桩复合地基设计提供参考。
Abaqus was used to simulate bearing capacity of CFG pile located in seasonally frozen ground after the freeze-thaw cycle. CFG piles with different initial elasticity modulus and thickness of cushion were consider in this paper. Load sharing ratio, pile-soil stress ratio and settlement curve were selected for evaluating. The results indicate that the road of the pile reduced dur to freeze-thaw cycle, but foundation settlement increased at the same time. A thicker cushion can reduce the difference of the between pile-soil stress ratio. The results can provide reference for practical engineering.
出处
《低温建筑技术》
2017年第11期125-128,共4页
Low Temperature Architecture Technology
关键词
冻土
CFG
冻融循环
承载力
CFG
freeze-thaw cycle
bearing capacity
seasonally frozen ground
