基于探针法的土壤热物性原位测量仪研制及应用  

Development and Application of Soil Thermal Properties In-situ Measuring Instrument Based on Probe Method

作　　者：张通[1] 张延军[1] ZHANG Tong;ZHANG Yanjun(College of Construction Engineering,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学建设工程学院,长春130026

出　　处：《实验室研究与探索》2021年第11期81-85,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(41772238);吉林省2021年工程研究中心(工程实验室)自主创新能力建设专项(2021C029)。

摘　　要：为满足土壤热物性原位测量需求,研制了土壤热物性原位测量仪,并通过室内外试验测试其性能,在地热探测中进行应用。该仪器基于探针法原理,包括热探针、探杆、数据采集处理系统等组成部分,通过可视化界面和人机交互实现土壤导热系数、热扩散系数、体积比热容、温度的原位测量。通过测量空气热物性确定该仪器最佳加热电压为9 V。室内细砂和粉质黏土样品测试结果显示,该仪器具有误差小、测量快速的特点。依托该仪器在厦门后埔热田开展地热探测,根据实测数据绘制浅层热流密度云图,圈定地热异常区。该土壤热物性原位测量仪可广泛应用于土壤热物性相关的科学研究和实验教学,具有突出的实用价值。In order to meet the needs of in-situ measurement of soil thermal properties,a soil thermal properties in-situ measuring instrument was developed,and its performance was tested through indoor and outdoor tests,and it was used in geothermal exploration.The instrument is based on the principle of the probe method,including thermal probe,probe rod,data acquisition and processing system,etc.It can achieve in-situ measurement of thermal conductivity,thermal diffusivity,volume specific heat capacity and temperature of soil through visual interface and human-computer interaction.The best heating voltage of the instrument is 9 V by measuring the thermal properties of air.Laboratory test results of fine sand and silty clay samples show that the instrument has the characteristics of small error and fast measurement.Relying on the instrument,the geothermal exploration was carried out in Houpu geothermal field,Xiamen.According to the measured data,the cloud map of shallow heat flux density was drawn and the geothermal anomaly area was delineated.The instrument can be widely used in scientific research and experimental teaching related to soil thermal properties,and has outstanding practical value.

关 键 词：探针法 土壤热物性 软件算法 原位测量 现场应用 

分 类 号：TU413[建筑科学—岩土工程]