摘要
土的热导率是开发浅层地热能的重要指标,其数值的准确性对于地源热泵的利用效率有很大影响,冻融作用对于季节性冻土区冻土的热导率存在一定影响,研究其变化规律对于季节性冻土区利用浅层地热能具有很好的参考价值。以长春市区冻土为研究对象,通过分析土的热导率变化机理,结合相关试验数据,最终确定在冻融作用下冻土热导率会逐渐变小的基本特点。利用有关试验研究成果,分别从含水率、塑性指数和孔隙比出发,初步确定了影响冻土热导率的变化的主要因素,并针对长春市区存在季节性冻土的特点,对该区域使用地源热泵提出合理化建议。
The thermal conductivity of the soil is an important index for developing the shallow geothermal energy,the accuracy of its numerical value has a great influence on the utilization efficiency of the ground source heat pump.The freeze-thaw action has also the influence on the thermal conductivity of frozen soil in the seasonal frozen soil region.The study on the variation of the geothermal energy has a good reference value for the utilization of the shallow geothermal energy in the seasonal frozen soil region.This paper introduces some basic characteristics of the frozen soil in Changchun area.By analyzing the mechanism of the variation of the thermal conductivity of the frozen soil and combining the relevant experimental data,the basic characteristics that the thermal conductivity of the frozen soil will gradually decrease under the freeze-thaw action are finally determined.Based on the experimental results,the main factors that affecting the thermal conductivity of the frozen soil are determined by the moisture content,plasticity index and void ratio.The main factors that affecting the thermal conductivity of the frozen soil are preliminarily determined.According to the characteristics of the seasonal frozen soil in Changchun area,some reasonable suggestions on the use of the ground-source heat pump in this area are also proposed.
作者
陈璐璐
庞博
CHEN Lulu;PANG Bo(Chengsheng Engineering Detection of Jilin Province co.,LTD,Changchun 130012;China Water Northeastern Investigation,Design&Research Co.,Ltd,Changchun 130000)
出处
《土工基础》
2022年第6期985-987,共3页
Soil Engineering and Foundation
关键词
冻融作用
冻土
热导率
Freeze-Thaw Action
Frozen Soils
Thermal Conductivity
