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In-situ test apparatus and test method of thermal conductivity of soil and geothermic gradient

An in-situ test and thermal conductivity technology, applied in the field of geotechnical engineering, can solve the problems of high economic cost, heavy test equipment, low test efficiency, etc., and achieve the effect of convenient operation, high test accuracy and simple structure

Active Publication Date: 2018-04-27
SOUTHEAST UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

It is one of the key factors that affect the investment and energy consumption of geothermal pump projects. The current test instruments are relatively heavy, and the test efficiency is low, and the economic cost is high.

Method used

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  • In-situ test apparatus and test method of thermal conductivity of soil and geothermic gradient
  • In-situ test apparatus and test method of thermal conductivity of soil and geothermic gradient
  • In-situ test apparatus and test method of thermal conductivity of soil and geothermic gradient

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Experimental program
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Embodiment Construction

[0027] In the embodiment, the probe rod 1, the telescopic thermal probe rod 2, the probe 3, the annular thermal sensor 4, the hot wire source 5, the micro motor 6, the data receiving module 7, the micro motor power transmission device 8, and the telescopic sleeve rod 9.

[0028] This application is a segmented penetration in-situ test device for testing soil thermal conductivity and geothermal gradient using the transient line heat source method, specifically as figure 1 The in situ test setup for soil thermal conductivity and geothermal gradient shown in ‐2,

[0029] It includes a probe rod, a telescopic thermal probe rod and a probe connected sequentially from top to bottom; the telescopic thermal probe rod includes a telescopic sleeve rod, a ring thermal sensor, a heat source and a micro motor; one end of the telescopic sleeve rod is connected to the probe, and the other end is connected to the Probe rod; there are two or more micro motors, and the two or more micro motors ...

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Abstract

The application belongs to the field of geotechnical engineering, and relates to an in-situ test apparatus and a test method of thermal conductivity of soil and geothermic gradient. The apparatus comprises a probing rod, a telescoping heat probing rod, and a probe which are connected from up to bottom in order; the telescoping heat probing rod comprises a telescoping loop rod, annular heat sensors, a heat line source, and micro motors; one end of the telescoping loop rod is connected to the probe and the other end is connected to the probing rod; two or more micro motors are provided, two or more micro motors are installed on the telescoping loop rod at uniform intervals, and the telescoping loop rod can be telescoped under the dynamic effects of micro motors; two or more annular heat sensors are provided, and the annular heat sensors are correspondingly installed on the micro motors; the heat line source is installed in the telescoping loop rod. The geothermic gradient test and the thermal conductivity test are combined, so that exploration engineering is convenient, rapid, accurate, and economic, and fast, effective and cheap test parameters are provided for geothermal energy resource researches and energy engineering designs.

Description

technical field [0001] The invention belongs to an in-situ test element and device capable of effectively and accurately obtaining basic engineering properties and thermodynamic properties of soil in the field of geotechnical engineering, and relates to a method for testing soil thermal conductivity and thermal gradient by using a transient line heat source method The in-situ test device for segmental penetration, in particular relates to an in-situ test device and a test method for soil thermal conductivity and geothermal gradient. Background technique [0002] The transient line heat source method is a transient temperature response based on the infinite medium pulse heating a linear body to form a line heat source. By recording and fitting the relationship between the temperature rise and the response time of the probe, and then calculating the thermal conductivity of the material through the formula The experimental method can be used to solve the analysis of thermodynam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 张文伟蔡国军刘松玉
Owner SOUTHEAST UNIV
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