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Improved design method of thermal conductivity model based on basic soil physical parameters

A technology of thermal conductivity and basic parameters, which is applied in the field of thermal conductivity model design based on basic soil physical parameters, can solve the problems of difficulty in determining model parameters, insufficient factors involved, large errors, etc., and achieves rapid acquisition, good fitting accuracy, The effect of high fitting effect

Active Publication Date: 2019-01-01
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide an improved thermal conductivity model design method based on soil physical basic parameters, which solves the problems in the prior art that the model parameters are difficult to determine, the error is large, and the factors involved are not comprehensive enough.

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  • Improved design method of thermal conductivity model based on basic soil physical parameters
  • Improved design method of thermal conductivity model based on basic soil physical parameters
  • Improved design method of thermal conductivity model based on basic soil physical parameters

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] Used 16 kinds of mineral soils in the present invention, as shown in table 1. Soils 1-9 include almost all soil types in the 16 soils, so they can be used as a comprehensive data set to build a new model, and the other 7 soils (soils 10-16) are used as a validation data set to validate the new model applicability.

[0067] Table 1 Basic parameters of soil physics

[0068]

[0069]

[0070] An improved thermal conductivity model design method based on soil physical basic parameters of the present invention is specifically implemented according to the following steps:

[0071] Step 1, the object of the present invention are on the basis of models such as Johansen (1975) model and Nikoosokhan et al. (2015), and propose a new simple model based on each physical basic parameter of soil, concrete steps are as follows:

[0072] Step ...

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Abstract

The invention discloses an improved design method of a thermal conductivity model based on soil physical basic parameters, which is carried out according to the following steps: firstly, a new model is created based on each physical basic parameter affecting soil thermal conductivity lambda; then the thermal conductivity Lambda dry of dry soil and Lambda sat of saturated soil in the new model arecalculated, and N kinds of mineral soils are selected from M kinds of soil samples for fitting, and the optimum shape factors alpha and beta of N kinds of soils are obtained, among which, M>15, N>8; finally, through the multivariate linear combination, the matrix is listed, the multivariate linear equation is solved, the influence parameters of each influence factor in the new model are obtained,and the final model is obtained. The invention solves the problems that the model parameters in the prior art are difficult to determine, the error is large, and the factors involved are not comprehensive enough.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to an improved thermal conductivity model design method based on soil physical basic parameters. Background technique [0002] The thermal properties of soil include thermal conductivity, thermal diffusivity and specific heat capacity. Among them, the heat conduction coefficient is the most important property. It not only determines the heat propagation speed in the soil and the distribution of the soil temperature field, but also is an important parameter of the soil water, heat, and solute coupling numerical model. In terms of monitoring the seepage of earth-rock dams, the abnormal seepage points in the dam can be found indirectly by monitoring the temperature distribution of the earth-rock dam, and the distribution of the seepage field of the dam body can be obtained, so as to achieve the purpose of monitoring the seepage of the earth-rock dam. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/12G06F17/50
CPCG06F17/12G06F30/20
Inventor 任杰门利利陈波杨杰
Owner XIAN UNIV OF TECH
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