文献类型：期刊文献

中文题名：正冻黏土瞬态温度场计算方法改进与试验验证

英文题名：Improvement and experimental verification of transient temperature field calculation for freezing clay

作者：王凯[1];李顺群[1,2];陈之祥[1];桂超[3]

第一作者：王凯

机构：[1]天津城建大学土木工程学院;[2]天津市软土特性与工程环境重点实验室;[3]新乡学院土木工程与建筑学院

第一机构：天津城建大学土木工程学院,天津300384

年份：2017

卷号：34

期号：2

起止页码：157-164

中文期刊名：深圳大学学报：理工版

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金资助项目(41472253);天津市自然科学基金重点资助项目(16JCZDJC39000)~~

语种：中文

中文关键词：冻土工程;人工冻结;水热力耦合;瞬态温度场;潜热;正冻黏土

外文关键词：frozen soil engineering; artificial freezing; moisture-heat-stress coupled; transient temperature field;latent heat; freezing clay

摘要：针对现有正冻黏土瞬态温度场计算方法存在的问题,指出正冻黏土中未冻水含量随温度的变化是导致瞬态温度场计算误差较大的原因.在引入未冻水含量计算模型和水/冰相变潜热动态关系的基础上,建立了适用于正冻黏土的热质扩散方程,对其瞬态温度场进行了计算分析.采用现有的3种计算方法和提出的正冻黏土瞬态温度场计算方法,通过ABAQUS软件模拟了模型槽人工冻结试验的瞬态温度场,对比了模拟结果和试验结果.研究表明,与现有的计算方式相比,所提正冻黏土瞬态温度场计算方法计算精度更高.研究可提高冻土-水热力耦合问题的求解精度,服务于人工冻结法的设计和实践.
We analyze the existing identify that the main cause of the content with the temperature in problems in the calculation of transient temperature field in freezing soil and calculation error of transient temperature field is the change of unfrozen water freezing dynamic relationship of water/ice phase analyze the transient temperature field. temperature field calculation method in clay. Based on the calculation model of unfreezing water content and the latent, we establish the heat-mass diffusion equations for freezing clay, and By using three existing calculation methods and the proposing transient freezing soil, we conduct the simulation of the transient temperature field of artificial freezing experiment for model slot by ABAQUS software, and compare the four simulation results with the experimental results, respectively. The results show that the method of calculating transient temperature field in freezing clay is not only theoretically reliable but also more accurate than three existing methods. The method can improve the calculation accuracy of the coupled problem of moisture-heat-stress, and then serves the design and practice of artificial freezing method.