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GFRP静压桩挤土效应模型试验研究
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Model Test Research on Squeezing Effect of Jacked GFRP Pile
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    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P m随着径向距离的增大不断衰减.当径向距离达到3D时,P m衰减至峰值径向挤土压力的最大值P mm的30%以下;P mm出现在桩身中下部,数值大致与桩径成正比.

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    In order to investigate the interaction between GFRP pile and soil as well as dynamical mechanics effect in driving pile,model test of jacked GFRP piles was conducted,and the heave of topsoil and radial squeezing pressure were analyzed. The results show that the heave of topsoil reaches the maximum value when the radial distance is equal to 1.8 times the pile diameter. The maximum value decreases with the increase of the depth of piling and eventually stabilizes at about 5 percent of pile diameter. Radial squeezing pressure in a certain depth first increases and then decreases with the increase of the depth of piling,and reaches the maximum value when the depth of piling is equal to the depth of measure point. The maximum value of radial squeezing pressure,Pm,decreases with the increasing radial distance. When the radial distance increases to be three times of the pile diameter,Pm reduced to thirty percent of P mm (i.e.,the peak value of Pm) or less.P mm appears at the lower part of the pile,whose value is roughly in proportion to the pile diameter.

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杨果林,魏赛赛,关耀,余文华. GFRP静压桩挤土效应模型试验研究[J].湖南大学学报:自然科学版,2017,44(11):164~169

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  • 在线发布日期: 2017-11-27
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