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冰川冻土 ›› 2002, Vol. 24 ›› Issue (2): 181-185.doi: 10.7522/j.issn.1000-0240.2002.0031

• 冰冻圈与全球变化 • 上一篇    下一篇

双排管冻结下冻结壁温度场形成特征的数值分析

汪仁和1,2, 曹荣斌2   

  1. 1. 中国科技大学力学与机械工程系, 安徽合肥, 230026;
    2. 安徽理工大学土木工程系, 安徽淮南, 232001
  • 收稿日期:2001-09-18 修回日期:2002-01-25 出版日期:2002-04-25 发布日期:2012-04-26
  • 基金资助:
    安徽省自然科学基金项目(01044503)资助

Numerical Analysis of the Temperature Field Features in the Frozen Wall with Double Rows of Freezing Pipes

WANG Ren-he1,2, CAO Rong-bin2   

  1. 1. Department of Modern Mechanics, University of Science and Technology of China, Hefei Anhui 230026, China;
    2. Department of Civil Engineering, University of Science and Technology of Anhui, Huainan Anhui 23200
  • Received:2001-09-18 Revised:2002-01-25 Online:2002-04-25 Published:2012-04-26

摘要: 冻结时间、冻结壁厚度和冻结壁温度场的性状是冻结法施工的关键参数,以工程实例为背景,考虑了水的导热系数λ和比热c的相态变化以及冻结管吸热参数随温差而变化等因素,利用ANSYS大型有限元计算程序,对单、双排管冻结下冻结壁的形成及其变化特征进行详细的计算分析,得出了双排管冻结下冻结时间缩短、冻结效率提高、冻结壁平均温度下降等特性.最后,探讨了双排管冻结下冻结壁平均温度的简化计算方法

关键词: 冻结壁, 温度场, 双排管冻结, 有限元计算, 平均温度

Abstract: The freeze time、the thickness of the frozen wall and the temperature field behavior of the frozen wall are the major factors in freezing construction. In the past years detailed analysis about the temperature field behavior of the frozen wall with single row of freezing pipes has been done, and now there have been useful and practical rule and calculation formulas for us to refer to. Following the development of the society, it is urgent to make use of freezing method under double or even more rows of freezing pipes in many practical engineering projects for some special reasons. Nevertheless, the analysis about the development and the changing character of the temperature field in the frozen wall with double or even more rows of freezing pipes is scarce. In this paper, the development and changing features of the temperature field in the frozen wall with single and double rows of freezing pipes are analyzed in detail with the ANSYS Finite Element Calculation Software, referring to one engineering project. Water having different thermal conductivity and different specific heat in two different phases is taken into account in the analysis. Again the thermal exchanging coefficient of the freezing pipes is considered varying with changing temperature contrast. The temperature field behavior under such condition is gotten from the analysis. The conclusion about the superiority of the freezing method under double rows of freeze pipes condition is drawn, that freeze time can be shortened largely, and the freeze efficiency can be improved largely, and the average temperature in the effective thickness of the frozen wall descends largely. This conclusion has significant guidance meaning in choosing the project of freezing construction. The simplified calculation method about the average temperature in the effective thickness of the frozen wall under double rows of freeze pipes condition is discussed in this paper,too.

Key words: frozen wall, temperature field, frozen with double rows of freezing pipes, finite element calculation, average temperature

中图分类号: 

  • P642.14