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水平冻结水泥土加固盾构洞门温度场敏感性分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2013年03期
Page:
145-151
Column:
研究论文
publishdate:
2013-05-20

Article Info:/Info

Title:
Sensitivity study of soil thermal field in horizontal freezing shield portal reinforced by cement
Author(s):
WANG JieYANG Ping*ZHANG XiangyuWANG Xunuo
College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
Keywords:
horizontal freezing temperature field numerical simulation sensitivity study portal
Classification number :
U455.49
DOI:
10.3969/j.issn.1000-2006.2013.03.026
Document Code:
-
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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Last Update: 2013-05-31