GFRP静压桩挤土效应模型试验研究

发布时间：2018-01-03 00:23

本文关键词：GFRP静压桩挤土效应模型试验研究　出处：《湖南大学学报(自然科学版)》2017年11期 　论文类型：期刊论文

【摘要】：为掌握GFRP桩-土相互作用机理及压桩动态力学效应,开展GFRP静压桩模型试验研究,对表土隆起量和径向挤土压力进行分析.分析表明:表土隆起量在径向距离在1.8D(桩径)处达到峰值.此峰值随沉桩深度的增加而减小,数值最终大致稳定在0.05D;径向挤土压力随沉桩深度的增加而先增大后减小,当沉桩深度大致等于测点深度时,测点处径向挤土压力达到峰值;峰值径向挤土压力Pm随着径向距离的增大不断衰减.当径向距离达到3D时,Pm衰减至峰值径向挤土压力的最大值Pmm的30%以下;Pmm出现在桩身中下部,数值大致与桩径成正比.
[Abstract]:In order to understand the mechanism of GFRP pile-soil interaction and the dynamic mechanical effect of pile-pressing pile, the GFRP static pile model test was carried out. The analysis of the surface soil uplift and the radial squeezing pressure shows that the topsoil uplift reaches its peak value at the radial distance of 1.8D (pile diameter), and the peak value decreases with the increase of the piling depth. The numerical value is approximately stable at 0.05D; The radial compaction pressure increases first and then decreases with the increase of the piling depth. When the piling depth is approximately equal to the depth of the measured point, the radial compaction pressure reaches the peak value at the measured point. The peak radial squeezing pressure pm decreases with the increase of radial distance. When the radial distance reaches 3D, the peak radial pressure decreases below 30% of the maximum Pmm of the peak radial squeezing pressure. Pmm appears in the middle and lower part of the pile, and the value is proportional to the diameter of the pile.
【作者单位】：中南大学土木工程学院;中建五局土木工程有限公司;
【基金】：国家自然科学基金资助项目(51478484,51778641) 中建五局土木工程有限公司立项项目(02012016YN77,02012016YN89)~~
【分类号】：TU473.1
【正文快照】： 纤维增强复合材料(fiber reinforced polymer,FRP)是由高性能纤维和树脂基体按比例混合加工而成的一种新型复合材料,当所用加强纤维为玻璃纤维时便称作玻璃纤维增强复合材料(glass fiberreinforced polymer,GFRP),具有轻质高强、耐腐蚀、耐疲劳的特点[1].在工程结构中使用GFRP

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