冻土水热耦合模型数值求解及结果检验

doi:10.13278/j.cnki.jjuese.201501202

吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (1): 207-213.doi: 10.13278/j.cnki.jjuese.201501202

冻土水热耦合模型数值求解及结果检验

李杨^1,2, 王清², 王坛华²

1. 福建工程学院土木工程学院, 福州 350014;
2. 吉林大学建设工程学院, 长春 130026

收稿日期:2014-04-27 发布日期:2015-01-26
作者简介:李杨(1981), 女, 工程师, 博士, 主要从事工程地质、岩土工程, 地质灾害防治等方面的研究, E-mail:liyang513@foxmail.com
基金资助:
国家自然科学基金项目(40672180,41372267);高等学校博士学科点专项科研基金项目(20120061110054);福建工程学院科研启动基金项目(GY-Z12077)

Numerical Solution and Test of Results for a Hydrothermal Coupled Model About Frozen Soil

Li Yang^1,2, Wang Qing², Wang Tanhua²

1. Department of Civil Engineering, Fujian University of Technology, Fuzhou 350014, China;
2. College of Construction Engineering, Jilin University, Changchun 130026, China

Received:2014-04-27 Published:2015-01-26

摘要/Abstract

摘要：

首先对作者所建立的基于多孔介质理论的季节冻土水热迁移耦合模型进行数值求解;对模型方程进行修正, 并给出了模型方程中参数的确定方法。然后以长春松原公路段土体为研究对象, 对实际工程中冻结情况下水分迁移的情况进行预测;给定模型边界条件对模型求解, 将结果与野外实际监测结果进行对比。温度变化对比数据表明, 模型可以较好地预测终值情况, 而中间过程的误差较大, 但是趋势基本一致。水分迁移方向及量的对比数据表明, 模型计算结果要小于实测结果, 但是整体上计算结果与实测结果的变化趋势较一致, 且同样是和最终值吻合较好, 误差最小。结果表明, 模型计算结果可较好地模拟参数最终值, 但存在一定误差。

关键词: 多孔介质, 水热迁移, 耦合模型, 温度, 含水率

Abstract:

A hydrothermal coupled model established previously by the author based on the theory of porous media seasonally frozen soil was solved numerically in this article. First, the model equations were corrected, and the method to determine parameters in equations was given. Then Changchun-Songyuan highway soil was chosen as the object for the study, and the case of frozen moisture migration can be predicted in the actual project. Model was solved under the given circumstances the model boundary conditions, and the model solution results were compared with actual field monitoring results. The comparative data of temperature gradient show that the model can predict the final value of the parameter, while the middle of the process error is large, but the same trend. The comparative data of direction and the amount of moisture migration indicates that the model results to be less than the measured results, but overall the same trend. And the same with temperature gradient that the final values agree well with the smallest error, an average of about 2%. The results show that the model can simulate calculated parameters for the final values, but there is an error, and the error is within an acceptable range.

Key words: porous media, hydrothermal transfer, coupling model, temperature, moisture content

中图分类号:

TU443

李杨, 王清, 王坛华. 冻土水热耦合模型数值求解及结果检验[J]. 吉林大学学报(地球科学版), 2015, 45(1): 207-213.

Li Yang, Wang Qing, Wang Tanhua. Numerical Solution and Test of Results for a Hydrothermal Coupled Model About Frozen Soil[J]. Journal of Jilin University(Earth Science Edition), 2015, 45(1): 207-213.

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冻土水热耦合模型数值求解及结果检验

Numerical Solution and Test of Results for a Hydrothermal Coupled Model About Frozen Soil

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