[1]黄建华,王叶,覃少杰,等.液氮冻结竖直向与水平向温度场特性[J].福建工程学院学报,2023,21(01):20-28.[doi:10.3969/j.issn.1672-4348.2023.01.004]
　HUANG Jianhua,WANG Ye,QIN Shaojie,et al.Temperaturefield characteristics of liquidnitrogen freezing along〖JZ〗the vertical and horizontal directions[J].Journal of FuJian University of Technology,2023,21(01):20-28.[doi:10.3969/j.issn.1672-4348.2023.01.004]
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液氮冻结竖直向与水平向温度场特性()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第21卷
期数:
2023年01期
页码:
20-28
栏目:
出版日期:
2023-02-25

文章信息/Info

Title:
Temperaturefield characteristics of liquidnitrogen freezing along〖JZ〗the vertical and horizontal directions
作者:
黄建华; 王叶; 覃少杰; 严耿明; 袁晓玉
福建工程学院土木工程学院
Author(s):
HUANG Jianhua;  WANG Ye;  QIN Shaojie;  YAN Gengming;  YUAN Xiaoyu
School of Civil Engineering, Fujian University of Technology
关键词:
人工冻结加固; 液氮冻结; 温度场; 对流换热; 数值模拟
Keywords:
artificial frozen reinforcement;  liquid nitrogen freezing;  temperature field;  convective heat transfer;  numerical simulation
分类号:
TU443
DOI:
10.3969/j.issn.1672-4348.2023.01.004
文献标志码:
A
摘要:
分析液氮冻结的现场实施情况，结合工程背景资料建立数值分析模型，通过计算分析并与现场实测成果验证，系统研究液氮冻结过程中竖直方向与水平方向温度场分布特征及其变化规律。结果表明:液氮冻结通过沸腾吸热与对流换热方式达到降温冻结的效果，相较于盐水循环冻结方式，液氮冻结效率高，周期短；但其冻结温度场分布不均匀，在竖直方向上存在较大温差，温度最低区域分布在液氮沸腾区范围，而水平方向上分布较为均匀；温度场中低温区域并不在两排冻结管之间均匀发展，冻结区域向连续墙方向发展的速度比土体方向发展速度快。基于研究成果，提出了液氮冻结加固设计、施工的优化建议，为今后液氮冻结工程提供理论依据与技术参考。
Abstract:
The field implementation of liquid nitrogen freezing was analyzed and the numerical analysis model was established by combining engineering background information. The characteristics of vertical and horizontal temperature field distribution and its change law during the freezing process of liquidnitrogen were systematically studied through calculation and analysis and verification with field measurement results. Results show that liquidnitrogen freezing method could achieve the effect of cooling and freezing through the way of boiling heat absorption and convection heat transfer. Compared with the brine circulation freezing method, the liquidnitrogen freezing method has a higher efficiency and a shorter cycle. However, the distribution of freezing temperature field of the liquidnitrogen freezing method is not uniform. There is a large temperature difference in the vertical direction, and the lowest temperature region is distributed in the liquidnitrogen boiling area, but the temperature field is more uniformly distributed in the horizontal direction. The medium to low temperature region of the temperature field does not develop uniformly between the two rows of frozen pipes, and the frozen area develops faster in the direction of the diaphragmwall than in the direction of the soil. Based on the research results, suggestions are proposed for the optimization design and construction of liquid nitrogen freezing reinforcement, which can provide theoretical basis and technical references for future liquidnitrogen freezing projects.

参考文献/References:

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更新日期/Last Update: 2023-02-25