Sensitivity study of soil thermal field in horizontal freezing shield portal reinforced by cement

WANG Jie,YANG Ping,ZHANG Xiangyu,WANG Xunuo

Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2013, Vol. 37 ›› Issue (03) : 145-151.

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Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2013, Vol. 37 ›› Issue (03) : 145-151. DOI: 10.3969/j.issn.1000-2006.2013.03.026

Sensitivity study of soil thermal field in horizontal freezing shield portal reinforced by cement

  • WANG Jie,YANG Ping*,ZHANG Xiangyu,WANG Xunuo
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Abstract

Relying on the horizontal soil freezing construction for 2﹟tunnel portal of shield entry projects in railway station of the second line of Suzhou Metro, numerical model of freezing temperature field is built for horizontal freezing shield portal by software. Effects of convection coefficient, thermal conductivity,volumetric heat capacity,latent heat of phase change,cement parameter on development of freezing effect were studied. The study demonstrates that the convection coefficient and volumetric heat capacity each with the freezing effect show two linear decreasing functions. The thermal conductivity with the freezing effect shows a linear decreasing function. But the latent heat of phase change has no effect on freezing effect. When the cement parameter is 20% in silty clay and 16% in silty soil, the freezing effect is the best.

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WANG Jie,YANG Ping,ZHANG Xiangyu,WANG Xunuo. Sensitivity study of soil thermal field in horizontal freezing shield portal reinforced by cement[J]. Journal of Nanjing Forestry University (Natural Sciences Edition). 2013, 37(03): 145-151 https://doi.org/10.3969/j.issn.1000-2006.2013.03.026

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