土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (1): 110-114.

• 测试技术 • 上一篇    

温度及自重应力对上海地区土的热物性参数影响研究

黄 晖1,2,3   

  1. （1.上海市地矿工程勘察（集团）有限公司，上海 200072；2.上海市岩土地质研究院有限公司，上海 200072；
    3.上海市浅层地热能工程技术研究中心，上海 200072）
  • 收稿日期:2022-01-06 修回日期:2022-01-07 出版日期:2022-02-28 发布日期:2022-03-11
  • 作者简介:黄 晖（1974-），女，工程师，研究方向为岩土工程、土工试验等。
  • 基金资助:
    上海市地矿工程勘察（集团）有限公司科研项目（Gky202016）

Influence of Temperature and Gravity Stress on Thermal Properties in Shanghai Soils

HUANG Hui 1,2,3   

  1. (1.Shanghai Geological Engineering Exploration (Group) Co., Ltd., Shanghai 200072;
    2.Shanghai Geotechnical Engineering & Geology Institute Co. Ltd., Shanghai 200072;
    3.Shanghai Shallow Geothermal Energy Engineering Technology Research Center, Shanghai 200072)
  • Received:2022-01-06 Revised:2022-01-07 Online:2022-02-28 Published:2022-03-11

摘要： 对上海奉贤区8种土进行温度及温度-自重应力耦合作用下的热物性试验，分别研究温度及温度-自重应力耦合作用下不同岩性土的导热系数、比热容、热扩散系数的变化规律。研究结果表明：导热系数、热扩散系数由大到小分别为砂质粉土、粉质黏土、黏土，比热容则反之；导热系数、热扩散系数与温度成正比，比热容与温度成反比；温度-自重应力耦合作用下，导热系数最大可提高9.8%，比热容最大可降低25.4%，热扩散系数最大可增大28.1%。


关键词: 温度, 自重应力, 热物性, 能源桩

Abstract: The thermal physical properties of eight (8) soils collected from Fengxian District of Shanghai were laboratory evaluated under the effects of temperature and the coupling effect of temperature-deadweight stress. The changes of thermal conductivity, specific heat capacity and thermal diffusivity of different soils under the coupling effect of temperature and temperature-deadweight stress were studied respectively. The results show that the thermal conductivity and the thermal diffusivity ranking from high to low are sandy silt, silty clay and clay respectively, and their specific heat capacities are opposite ranked. The value of thermal conductivity, thermal diffusion coefficient and temperature are directly proportional to the value of specific heat capacity and temperature value is inversely relationship; under the coupling effect, the maximum thermal conductivity can be increased by 9.8%, the maximum specific heat capacity can be decreased by 25.4%, and the maximum thermal diffusivity can be increased by 28.1%.

Key words: temperature, gravity stress, thermal properties, energy piles

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