Numerical Analysis on Thermodynamic Response Characteristics of Micro Steel Piles under Winter Conditions

徐健; 任连伟; 马艳; 任军洋

doi:10.13409/j.cnki.jdpme.2019.04.018

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Numerical Analysis on Thermodynamic Response Characteristics of Micro Steel Piles under Winter Conditions

更新时间：2025-12-11

- Numerical Analysis on Thermodynamic Response Characteristics of Micro Steel Piles under Winter Conditions
- Vol. 39, Issue 4, Pages: 665-672+690(2019)
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- DOI：10.13409/j.cnki.jdpme.2019.04.018
  CLC： U473.1;TU83
- Published：2019
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[1]徐健,任连伟,马艳,任军洋.冬季工况下微型钢管桩热力响应特性数值分析[J].防灾减灾工程学报,2019,39(04):665-672+690.

徐健, 任连伟, 马艳, et al. Numerical Analysis on Thermodynamic Response Characteristics of Micro Steel Piles under Winter Conditions[J]. 2019, 39(4): 665-672+690.
[1]徐健,任连伟,马艳,任军洋.冬季工况下微型钢管桩热力响应特性数值分析[J].防灾减灾工程学报,2019,39(04):665-672+690. DOI： 10.13409/j.cnki.jdpme.2019.04.018.

徐健, 任连伟, 马艳, et al. Numerical Analysis on Thermodynamic Response Characteristics of Micro Steel Piles under Winter Conditions[J]. 2019, 39(4): 665-672+690. DOI： 10.13409/j.cnki.jdpme.2019.04.018.

摘要

结合微型钢管桩热力响应特性现场试验

基于数值模拟方法

研究了冬季工况下流速、布桩形式等因素对微型钢管能量桩热力响应特性的影响规律。研究结果表明:换热效率增幅随流速的增加成非线性增长且最终趋于稳定

就本项目微型钢管桩而言

最佳流速为0.51～0.77m/s;桩身轴向最大附加拉应力约为桩身混凝土抗拉强度设计值的53.8%

不会导致桩体破坏;桩身轴向最大附加拉应力与温度改变之间的关系约为σT=110ΔT。

Abstract

There is less research on the thermodynamic response characteristics of energy piles under winter conditions at present.On the basis of the field tests on thermodynamic characteristics of micro steel energy piles

a numerical simulation study was carried out to analyze the effects of flow rates and pile layouts on the thermodynamic response characteristics of micro steel energy piles in winter conditions.The results show that:the growth rate of heat transfer efficiency increases nonlinearly with increasing flow rate and eventually tends to be stable.For the micro steel piles in this project

the optimum flow rate is between 0.51 m/s and 0.77 m/s.Under the conditions of this study

the axial maximum additional tensile stress of the pile at the five flow rates is about 53.8% of t

he design value of the pile concrete tensile strength

which cannot cause the break of pile.The relationship between the pile axial maximum additional tensile stress and the temperature increment of the pile can be expressed as σ

=110ΔT.

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references

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