文献类型：期刊文献

中文题名：单管冻结温度场演变规律分析及试验验证

英文题名：Development law of soil temperature field caused by freezing pipe and its freezing test verification

作者：马芸[1];夏锦红[1,2];桂超[1,3]

第一作者：马芸

机构：[1]新乡学院土木工程与建筑学院;[2]武汉理工大学土木工程与建筑学院;[3]上海理工大学能源与动力工程学院

第一机构：新乡学院土木工程与建筑学院

年份：2019

卷号：0

期号：2

起止页码：169-173

中文期刊名：人民长江

外文期刊名：Yangtze River

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；

基金：国家自然科学基金项目(41472253);2018年度河南省科技发展计划项目(182102310833)

语种：中文

中文关键词：冻结温度场;相变;冻结锋面半径;理论解析;冻结槽试验

外文关键词：freezing temperature field;phase change;frozen front radius;theoretical analysis;freezing tank test

摘要：为了研究土中水相变(潜热)热传导过程中冻结温度场演变规律,构建了稳定线性冷源作用下单管冻结相变温度场模型,由变量替换法求得冻结温度场随冻结时间演变规律近似解析解,同时利用指数积分函数解析式表达了冻结区和未冻结区的温度场分布,并将理论解析解与冻结槽试验结果进行比对。研究表明:理论与试验结果误差在合理范围内,验证了瞬态冻结温度场分布近似解析解的有效可靠性;单管冻结锋面半径和冻结时间有着平方根关系;冻结温度场在时空维度上服从对数分布,且曲线曲率随冻结时间的增加而逐渐减小。研究成果对认识稳定线性冷源作用下冻结管周围不良地基土温度场演变规律和指导冻结法施工技术有重要意义。
A phase-transition temperature field model for artificial single pipe freezing with a stable linear cold source was established and approximate analytical solution for freezing temperature development with time was obtained by variable substitution method. The temperature distributions in the frozen and non-frozen fields were expressed by an exponential integral function,and the theoretical results were compared with the freezing model test. The research results show that the error between theoretical calculation and test result is within a reasonable range,which verified the effectiveness and reliability of the approximate analytical solution for transient freezing temperature field distribution;the relation between the freezing-front radius and freezing time follows square root equation;the temperature field for a single freezing pipe obeys a logarithmic function in time and space and its curvature decreases with time. The research results have an important engineering significance to understanding the temperature field evolution law of poor foundation soil surrounding a freezing pipe under a stable linear cold source and guiding the freezing construction technology.