| 金格格,陈龙,李长恩,王明,曾昭宇.半埋管能源桩温度传播特性现场试验及Matlab数值模拟[J].河北工程大学自然版,2022,39(1):23-29 |
| 半埋管能源桩温度传播特性现场试验及Matlab数值模拟 |
| Field Tests and Matlab Numerical Simulation on the Temperature Propagapion Characteristics of Half-buried Energy Piles |
| 投稿时间：2021-09-25 |
| DOI：10.3969/j.issn.1673-9469.2022.01.004 |
| 中文关键词: 预应力管桩 半埋管 热水循环 温度热响应 温度场 |
| 英文关键词:prestressed pipe pile semi-buried pipe hydrothermal circulation temperature propagation temperature pattern |
| 基金项目:国家自然科学基金资助项目(51708175);中央高校基本科研业务费项目(B210202032) |
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| 中文摘要: |
| 依托浙江某工程路段,针对一种特殊的半埋管能源桩开展现场试验,通过对桩身及桩周土体温度等进行监测,研究了热水循环作用下能源桩的温度传播特性。发现温度荷载作用下桩体温升沿桩长方向先增大后减小,桩体埋深较深处的换热效率更显著。后通过Matlab模拟出不同桩深处距桩中心不同位置处土体温度值,桩侧临近范围内土体升温显著,因此在实际应用中需要考虑热温度循环对土体热传递特性和力学性质等物性参数的影响。结果表明:热水循环48 h,对距桩中心1 m(2.5D,D为能源桩直径)范围内土体温度有一定影响。延长模拟时间至一年有效工作时间,对土体温度场的影响范围可达2.8 m(7D)。 |
| 英文摘要: |
| Based on an engineering section in Zhejiang, field tests on exceptional energy piles with semi-buried pipes were carried out. By monitoring the temperature of the pile and the soil around the pile, the thermodynamic characteristics of the energy pile under hydrothermal circulation were studied. It was found that the temperature rise along the pile increased first and then decreased under temperature load, which indicated that the heat transfer effect of pile was more obvious at the greater depth. Values of soil temperature at different positions from different pile depths to the pile center were simulated by Matlab, and in the vicinity of the pile side, the soil temperature rose significantly. Therefore, the influence of thermal temperature cycle on the physical parameters of soil, such as heat transfer characteristics and mechanical properties, should be considered in practical application. The results show that the soil temperature within 1 m (2.5D, D is the diameter of the energy pile) from the pile center is affected by hydrothermal circulation for 48 hours. When the simulation time is extended to one year, the influence range of soil temperature field can reach 2.8 m (7D). |
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