| 冻土地区桩基础施工热稳定性分析 |
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| 引用本文： | 唐丽云,杨更社,奚家米.冻土地区桩基础施工热稳定性分析[J].筑路机械与施工机械化,2009,26(9):62-64. |
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| 作者姓名： | 唐丽云 杨更社 奚家米 |
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| 作者单位： | 西安科技大学,建筑与土木工程学院,陕西,西安,710054 |
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| 基金项目： | 国家自然科学基金，中交寒区道路工程重点实验室开放基金，教育部博士点基金 |
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| 摘 要： | 针对多年冻土地区桩基施工中水泥水化热对桩周温度场的热扰动问题．进行考虑相变的三维非稳态热分析，通过有限元模拟计算，得出随时间变化桩周温度场变化规律及不同深度处随时间变化沿径向桩基温度场变化规律。结果表明：混凝土水化热对桩周围土体的热扰动大而且时间长，应采取措施减小混凝土水化热，从而达到减小冻土区桩基热扰动问题。
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| 关 键 词： | 冻土地区 桩基础 水化热 热稳定性 |
Analysis on Thermal Stability for Construction of Pile Foundation in Cold Region |
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| TANG Li-yun,ANG Geng-she,I Jia-mi.Analysis on Thermal Stability for Construction of Pile Foundation in Cold Region[J].Road Machinery & Construction Mechanization,2009,26(9):62-64. |
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| Authors: | TANG Li-yun ANG Geng-she I Jia-mi |
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| Institution: | (School of Architecture and Civil Engineering, Xi＇an University of Science and Technology, Xi＇an 710054, Shaanx China) |
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| Abstract: | 3-D non-steady-state thermal analysis, considering the phase transition, is applied to analyze thermal perturbation of pile foundation in cold regions caused by cement hydration heat. The temperature field of the pile foundation varying with time and the radial temperature field variation of the frozen soil around pile are studied by finite element simulation. The results show that the hydration heat has significant thermal perturbation and a long time effect on the thermal stability of pile foundation. In order to reduce the perturbation, it is essential to reduce the hydration heat of concrete in cold regions. |
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| Keywords: | cold region pile foundation hydration heat thermal stability |
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