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冻土路基温度场室内足尺模型试验
引用本文:毛雪松,胡长顺,侯仲杰.冻土路基温度场室内足尺模型试验[J].长安大学学报(自然科学版),2004,24(1):30-33.
作者姓名:毛雪松  胡长顺  侯仲杰
作者单位:长安大学,特殊地区公路工程教育部重点实验室,陕西,西安,710064
基金项目:国家自然科学基金项目(50178010)
摘    要:取用多年冻土地区代表性土类进行冻土路基室内足尺模型试验,建立伴有相变的路基非稳态温度场的控制方程,在空间域内用采用混合单元的有限元网格划分,在时间域内用有限差分格式划分的混合解法进行有限元分析。通过对观测结果进行数值模拟,验证了数学模型的正确性。进一步分析路基温度场的变化规律与野外观测结果的变化规律,其一致性说明了室内模型试验可以模拟野外冻土路基的真实情况,为研究冻土路基温度场的变化规律提供了可靠依据。

关 键 词:道路工程  冻土路基  温度场  足尺模型试验  数值模拟
文章编号:1671-8879(2004)01-0030-04
修稿时间:2003年2月24日

Laboratory large-scale test of temperature field in permafrost sub-grade
Abstract:The permafrost sub-grade large-scale test was carried out with typical soil in permafrost zone to simulate the real field condition. This paper formulated the control equation of non-steady temperature field with phase changing, analyzed te equation with the finite-element method by adopting the grid segmentation of the mixture cell in space domain and by the mixture solution of the finite difference format segmentation in time domain, and validated the accurate of the mathematics model by numerically simulating the observing results. By further analyzing the changineg law of both the temperature field of the sub-grade and the field observing results, the consistency of the analyzing shows that the indoor model test can simulate the real status of the field permafrost sub-grade. It provides reliable guarantee for studying the changing law of the temperature field of the permafrost sub-grade.
Keywords:road engineering  permafrost sub-grade  temperature field  large-scale model test  numerical simulation
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