垂直受荷能量管桩受力性状试验研究
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郑州大学水利科学与工程学院

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TU473

基金项目:

国家杰出青年科学基金


Experimental Test on the Mechanical Behavior of Vertically Loaded Energy Pipe Piles
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Affiliation:

1.College of Water Conservancy &2.Engineering, Zhengzhou University

Fund Project:

The National Science Fund for Distinguished Young Scholars

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    摘要:

    为研究在能量桩与普通桩的承载能力、桩身轴力以及侧阻力的不同分布规律,进行现场静载荷对比试验。通过在桩身埋设应变计,测得不同工况时桩身应变的变化,分析Q-S曲线,桩身轴力分布、侧阻力发挥性状的异同,结果表明,三根试桩在达到极限荷载的条件下均产生侧阻增强效应,侧阻强化效应范围为桩身全长;同时,通过分析土层侧阻和桩土相对位移之间的关系,表明随着竖向荷载的增大,桩土相对位移逐渐增加,土体侧阻均先随桩土相对位移的增大而增大,当桩土位移达到极限值时,由于产生滑移,侧阻随相对位移的增大而减小,此时侧阻产生软化效应。

    Abstract:

    In order to study the different distribution laws of the bearing capacity, the axial forces of the piles shaft and the shaft resistance between the energy pile and the normal pile, the field static load test was carried out. By embedding strain gauges in the piles, the strains of different depths under different conditions were measured. By comparing the similarities and differences among Q-S curves, axial force distribution and shaft resistance of the piles, the analysis shows that The three test piles have the effect of shaft resistance enhancement , when reaching the ultimate load, and the shaft resistance strengthening effect is along the full length of the piles. Besides, the relationship between shaft resistance and relative displacement was investigated, it shows that as the vertical load increases, relative displacement becomes larger, and the shaft resistances gradually became largest , after reaching the ultimate value, due to the soil around pile will slide, the shaft resistance decreases with the relative displacement, the shaft resistance will have softening effect.

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王俊林,李钊. 垂直受荷能量管桩受力性状试验研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2021-06-15
  • 最后修改日期:2021-11-15
  • 录用日期:2021-11-22
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