| 冻土地基桥涵基础热稳定性数值分析 |
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| 引用本文： | 张瑞红,乔兰. 冻土地基桥涵基础热稳定性数值分析[J]. 科技信息, 2011, 0(15): 23-25 |
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| 作者姓名： | 张瑞红 乔兰 |
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| 作者单位： | [1] 华北科技学院土木工程系,中国北京101601 [2]北京科技大学土木环境工程学院,中国北京100083 |
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| 摘 要： | 针对内蒙古自治区根河至满归出口公路一在建桥涵基础,考虑相变、热生成及材料非线性,用有限元法模拟了现浇混凝土中的水化热以及开挖回填等动态施工过程对冻土地基温度场的影响,对基础下设的绝热保温层厚度以及预留边界进行了探讨,预测了未来50年的最大融深,总结了一些有价值的结论。
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| 关 键 词： | 冻土 水化热 动态施工 相变 保温材料 温度场 |
Numerical Analysis on Heat Stability of Frozen Soils Under Bridges and Culverts Foundation |
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| Abstract: | In this paper,we studied the effect on the soil temperature under bridges and culverts foundation on permafrost by hydration heat of cement in casting reinforced concrete and excavation with dynamic construction in Neinenggu highway, in which phase change, heat generation, non-linear materials and boundary were taken into account. The applicable thickness and margin of insulation were discussed and the maximum thaw depth in the following 50 years was predicted, some valuable＇conclusions were concluded. |
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| Keywords: | Frozen soils Hydration heat Dynamic construction Phase change Insulation Soil temperature |
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