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液氮冻结盾尾密封加固温度场的数值分析(PDF)

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

Issue:
2012年03期
Page:
120-124
Column:
研究论文
publishdate:
2012-05-30

Article Info:/Info

Title:
Numerical analysis of temperature field during liquid nitrogen freezing in high-confined aquifer reinforcement
Author(s):
CHEN Cheng YANG Ping* ZHANG Ting
School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
Keywords:
liquid nitrogen freezing shield tail confined aquifer frozen soil wall temperature field numerical analysis
Classification number :
U455.49
DOI:
10.3969/j.jssn.1000-2006.2012.03.025
Document Code:
A
Abstract:
In order to solve the problems of how to replace the water, the shield tail brushes and so on. With Qingchun Road cross-river tunnel of Hangzhou as an example, this paper applies ADINA finite element calculation software to compute thermal field for liquid nitrogen freezing 3-D model, studies thermal spatial distribution and the variation laws of temperature with time, and does the sensitivity analysis for influence factors of freezing temperature field. Through the contrast analysis of numerical simulation and field measurement, we get the development regularity of nitrogen freezing temperature field: liquid nitrogen freezing time is shorter along with the increase of thermal conductivity and slowly longer along with heat capacity; the liquid nitrogen freezing temperature is lower, the time of freezing is shorter, which solve the problem of shield brushes tail replacement in high-confined aquifer.

References

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Last Update: 2012-05-30