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Article by Yao R
Article by Du L
Article by Lyu S
Article by Shen M
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�ؼ����� �������   �ع����   ����ϵ��   ��Ȼ�ܶ�   ��ˮ��   ��϶��  
Correlation between thermal conductivity and physical properties of siltyclay in Changchun area
YAO Ren, DU Li-zhi, LYU Shou-hang, SHEN Ming-xie
College of Construction Engineering, Jilin University, Changchun 130026, China
Abstract: In order to study the correlation between thermal conductivity and influencing factors and establish a formula for calculating thermal conductivity, the authors take silty clay in Changchun area as the research object and apply regression analysis on the correlation between the thermal conductivity of undisturbed soil and its physical parameters.Nine remolded soil samples are used and the relevant parameter values are measured to verify the applicability of regression equation. The results show that the relationship between thermal conductivity and two physical parameters is not tenable by regression analysis. Considering natural density, water content and porosity as independent variables,the T-test significant values (Sig) of corresponding correlation coefficient are less than 0.05, while the coefficient of multiple determination is 0.886, so the established regression equation is tenable. Independent variable can accurately explain the variation of dependent variable, water content is negatively correlated with thermal conductivity, and the natural density and the porosity are positively correlated. The relative error between thermal conductivity value obtained by substituting relevant parameters of remolded soil samples into regression equation and the measured values is less than 4%, which verifies the universality and applicability of the regression equation.
Keywords: silty clay   regression analysis   thermal conductivity   natural density   water content   porosity  
�ո����� 2017-12-06 �޻����� 2018-04-09 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2018.03.031
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