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Calculating method for heat conductivity coefficient of soil mass minerals

A technology of thermal conductivity and calculation method, applied in the field of calculation of thermal conductivity of soil minerals, can solve problems such as inaccurate data, and achieve the effect of improving calculation accuracy and convenient calculation

Active Publication Date: 2017-11-28
TIANJIN CHENGJIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing literature can only use mineral analysis equipment to estimate the range of thermal conductivity of soil minerals, and cannot be accurate to specific data

Method used

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  • Calculating method for heat conductivity coefficient of soil mass minerals
  • Calculating method for heat conductivity coefficient of soil mass minerals
  • Calculating method for heat conductivity coefficient of soil mass minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Embodiment: A certain sandy soil is selected to carry out the effect test and verification of this method. The relative density of the sand was measured to be 2.67; the thermal conductivity of the sand with dry densities of 1.35, 1.4, 1.45, and 1.5 was measured respectively, combined with the calculation steps given above, the calculation results are shown in Table 1.

[0042] Table 1 Test of thermal conductivity of sandy soil and calculation of thermal conductivity of soil minerals

[0043]

[0044]

[0045] It can be seen from Table 1 that the average value of thermal conductivity of soil minerals obtained by this calculation method is 2.746, and the error between any two groups of calculated values ​​is kept within 4.46%.

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Abstract

The invention provides a calculating method for a heat conductivity coefficient of soil mass minerals. The method comprises steps as follows: measuring relative density of soil mass and calculating the maximum dry density rho(d-max) of the soil mass; making saturated soil samples with dry densities being rhod1 and rhod2 respectively and measuring heat conductivity coefficients of the saturated soil samples; calculating volume Vs of the soil mass minerals in the saturated soil samples and volume Vw of water in the soil mass minerals; calculating heat conductivity coefficients of the soil mass minerals in the saturated soil samples with dry densities being rhod1 and rhod2 respectively; calculating the heat conductivity coefficient ks of the soil mass minerals. The calculating method has the effects as follows: the method has the characteristics of being direct, realizing convenient calculation and the like, and a means is provided for calculation of the heat conductivity coefficient of the soil mass minerals. On the basis of contrastive analysis for the relative error, the forecast error of the calculating method is within 4.46%. By means of improvement of precision, calculation precision of the heat conductivity coefficient of the soil mass minerals can be improved to the greatest extent, and convenience is brought to establishment of a forecasting method of the heat conductivity coefficient of the soil mass.

Description

technical field [0001] The invention belongs to the thermal parameter calculation field in the geotechnical engineering field, in particular to a calculation method for the thermal conductivity coefficient of soil minerals, which can be used to determine the calculation parameters of the soil temperature field. Background technique [0002] Soil is a multiphase body composed of soil minerals, water and air. The thermal conductivity of soil is often calculated based on the volume composition of each phase in the soil and the thermal conductivity of each phase. Water and gas are continuous media, and their thermal conductivity values ​​can be obtained by physical and chemical methods. Soil minerals are solids with a certain structure in the form of skeletons, and their fragmentation and pore characteristics make them unable to form a continuous body. Therefore, the thermal conductivity of soil minerals measured according to conventional methods is actually the thermal conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/18G01N25/20
CPCG01N25/18G01N25/20
Inventor 陈之祥李顺群张勋程冯彦芳潘林娜穆坤郭林坪张彦
Owner TIANJIN CHENGJIAN UNIV
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