摘要
桩端位于基岩CFG桩复合地基工作性状不同于其他地区。通过现场静载荷试验确定岩基地区19根CFG桩复合地基荷载-沉降曲线,分析了岩基地区不同桩长情况下复合地基沉降变化及荷载传递机理。结果表明,桩端位于基岩CFG桩复合地基沉降量较小,长桩桩端阻力的发挥具有一定的滞后性,短桩呈现出明显的端承性。基于现有试验成果提出了岩基地区CFG桩复合地基沉降的二阶段模型。
The work traits of rigid pile composite foundation in batholith region is different from other region. Load - settlement curve of 19 CFG piles composite foundation were confirmed through the site load tests, and load transfer mechanism of the composite foundation with different piles length was discussed. The test results indicate that, the settlement is small and long pile base resistance has certain hysteresis while short pile with significant end -beating capacity. The settlement ideal model of CFG piles composite foundation in batholith region was proposed based on existing research results. The research can offer design basis of CFG pile composite foundation in the batholith region.
出处
《煤炭工程》
北大核心
2015年第7期127-129,共3页
Coal Engineering
基金
河北省教育厅基金(QN2014070)
关键词
CFG桩复合地基
端承性
桩侧摩阻力
岩基地区
二阶段模型
CFG pile composite foundation
end - baring
shaft resistance
batholith region
two phase model
