| 季节性冻土区高速铁路换填路基冻结特征的有限元分析 |
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| 引用本文： | 刘华, 牛富俊, 牛永红, 林战举, 鲁嘉濠. 2013: 季节性冻土区高速铁路换填路基冻结特征的有限元分析. 工程地质学报, 21(4): 516-524. |
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| 作者姓名： | 刘华 牛富俊 牛永红 林战举 鲁嘉濠 |
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| 作者单位： | 1.冻土工程国家重点实验室中国科学院寒区旱区环境与工程研究所 兰州 730000;;2.中国科学院大学 北京 100049;;3.西安建筑科技大学土木工程学院 西安 710055;;4.中交第一公路勘察设计院集团有限公司多年冻土区道路建设与养护行业重点实验室 西安 710068;;5.煤炭资源与安全开采国家重点实验室重庆研究中心重庆地质矿产研究院 重庆 400042 |
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| 基金项目： | 科技部973计划项目(2012CB026101)自然科学重点基金项目(41030741)和创新群体项目(41121061)资助 |
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| 摘 要： | 运用土壤冻结融化条件下热传导的基本方程和数值理论方法,结合哈大客运专线具体工程,通过模拟分析在不同的路基高度、几何断面选型、填料选择和施工、竣工季节条件下,对比分析了换填路基结构不同部位的季节性最大冻结深度在今后50a内随着时间在全球升温的背景趋势下的变化规律。通过分析并讨论换填路基的热状况特征及其分布变化规律,在数值模拟结果的基础上,结合季节性冻土区高速铁路无碴轨道路基结构的特点,总结并提出了较为合理的换填路基高度、几何结构形式选型、路基填料的选择分类以及路基施工和竣工季节,并通过以上结果分析评价了换填后路基的整体热稳定性。
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| 关 键 词： | 季节性冻土区 换填法 高速铁路路基 数值分析 哈大客运专线 |
| 收稿时间： | 2012-05-08 |
| 修稿时间： | 2012-12-07 |
FINITE ELEMENT ANALYSIS ON FROZEN CHARACTERISTIC OF ROADBED WITH EXCHANGE FILLING MATERIAL IN HIGH-SPEED RAILWAY IN SEASONAL FROZEN GROUND |
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| LIU Hua, NIU Fujun, NIU Yonghong, LIN Zhanju, LU Jiahao. 2013: FINITE ELEMENT ANALYSIS ON FROZEN CHARACTERISTIC OF ROADBED WITH EXCHANGE FILLING MATERIAL IN HIGH-SPEED RAILWAY IN SEASONAL FROZEN GROUND. JOURNAL OF ENGINEERING GEOLOGY, 21(4): 516-524. |
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| Authors: | LIU Hua NIU Fujun NIU Yonghong LIN Zhanju LU Jiahao |
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| Affiliation: | 1.State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000;;2.University of Chinese Academy of Sciences, Beijing 100049;;3.Xi'an University of Architecture and Technology, School of Civil Engineering, Xi'an 710055;;4.Cold Regions Road Engineering Laboratory, CCCC First Highway Consultants CO.LTD, Xi'an 710068;;5.Chongqing Research Center of State Key Laboratory of Coal Resources and Safe Mining, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042 |
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| Abstract: | Frost heave has caused serious damage to railway roadbeds in seasonal frozen regions. Therefore, frost heave prevention is the basic principle of roadbed design in seasonal frozen regions. It is a rigorous task because of the strict demand of the deformation in high-speed railway. The heat transport equation and two-dimensional finite element method are employed to simulate the maximum frozen depth in the coming 50 years. The simulation consider the warming environment temperature in the conditions of different depths, shapes, filling materials, and construction seasons. It studies the roadbed temperature field of different parts in high-speed railway. Based on the numerical simulation, appropriate depth, shape, filling material and construction season are proposed for exchange filling material roadbed design. The relationship between the railroad and the railway thermal stability is analyzed as well. |
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| Keywords: | Seasonal frozen ground Method of exchange filling material High-speed railroad Numerical analysis Harbin to Dalian passenger dedicated line(HDPDL) |
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