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Thermomechanical Behavior of Energy Pile Embedded in Sandy Soil

机译：砂土中能量桩的热力学行为

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摘要

The traditional energy pile (solid energy pile) has been implemented for decades. However, the design of different kinds of energy piles is still not well understood. In this study, a series of model tests were performed on an aluminum pipe energy pile ( PEP) in dry sandy soil to investigate the thermal effects on the mechanical behaviors of pipe energy pile. The thermal responses of the PEP were also analyzed. Steady temperatures of the PEP under different working conditions were also compared with that of the solid energy pile. Different loading tests were carried out on four pipe energy piles under three different temperatures of 5, 35, and 50 degrees C, respectively. The bearing capacity change can be interpreted through the load-displacement curves. Experiment results were also compared with the solid energy pile to evaluate bearing capacities of the PEP and the solid energy pile under different temperature conditions. The mobilized shaft resistance was also calculated and compared with the solid energy pile data and the results show that the PEP has a similar load transfer mechanism with the solid energy pile. It could also be found that, for PEPs under working load, plastic displacement would appear after a whole heating cycle.
机译：传统的能源堆（固体能源堆）已经实施了数十年。但是，对各种类型的能量堆的设计仍然没有很好的理解。在这项研究中，在干燥的沙质土壤上对铝管能量桩（PEP）进行了一系列模型测试，以研究热效应对管能量桩力学性能的影响。还分析了PEP的热响应。还比较了PEP在不同工作条件下的稳定温度与固体能量堆的稳定温度。在分别于5、35和50摄氏度的三种不同温度下，对四个管道能量桩进行了不同的载荷测试。承载能力的变化可以通过载荷-位移曲线来解释。还将实验结果与固体能桩进行比较，以评估PEP和固体能桩在不同温度条件下的承载能力。还计算了动员的轴阻力并将其与固体能量桩数据进行比较，结果表明，PEP具有与固体能量桩相似的载荷传递机制。还可以发现，对于在工作负载下的PEP，整个加热周期后都会出现塑性位移。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第3期|5341642.1-5341642.11|共11页
  • 作者

    Huang Xu; Wu Yajun; Peng Huaifeng; Hao Yaohu; Lu Chenyang;

  • 作者单位

    Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China;

    Shanghai Univ, Dept Civil Engn, Shanghai 200072, Peoples R China;

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