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| 基于温度场的冻土路基变形数值分析及对比 | |
| 引用本文： | 梁波,刘德仁,张贵生.基于温度场的冻土路基变形数值分析及对比[J].地下空间与工程学报,2010,6(2). |
| 作者姓名： | 梁波 刘德仁 张贵生 |
| 作者单位： | 1. 重庆交通大学土木建筑学院,重庆,400074 2. 兰州交通大学,兰州,730070 3. 天津市政工程设计研究院,天津,300051 |
| 基金项目： | 铁道部科技开发计算资助项目 |
| 摘 要： | 考虑相变和全球气温升高的影响,利用数值分析方法,对青藏铁路典型路基的变形问题进行了分析和数值模拟。通过建立路基有限元模型,选取适当的边界条件、初始条件及热学计算参数,在计算了典型路基断面温度场变化的前提下,对三年的路基变形场进行了数值分析并与实际测试资料进行了对比分析。分析表明,融化沉降在一年内已基本完成,并逐渐开始回冻,两三年后,除路堤填料和地基的进一步压密外,蠕变效应开始显现。因此,对高温、高含冰量冻土而言,蠕变产生的沉降变形是不可忽略的。 |
| 关 键 词： | 多年冻土 温度场 路基变形 数值分析 |
Numerical Analysis and Contrast about Permafrost Subgrade Deformation Based on Temperature Field |
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| Liang Bo,Liu Deren,Zhang Guisheng.Numerical Analysis and Contrast about Permafrost Subgrade Deformation Based on Temperature Field[J].Chinese Journal of Underground Space and Engineering,2010,6(2). | |
| Authors: | Liang Bo Liu Deren Zhang Guisheng |
| Affiliation: | Liang Bo1,Liu Deren2,Zhang Guisheng3(1.School of Civil Engineering and Architecture,Chongqing Jiaotong University,Chongqing 400074,China,2.Lanzhou Jiaotong University,Lanzhou 730070,3.Tianjin Municipal Engineering Design & Research Institute,Tianjin 300051,China) |
| Abstract: | Considering the phase-changes and influence of the global temperature rising and using the numerical calculation method,the computed simulation about the deformation problem of the typical subgrade of Qinghai-Tibet Railway has been carried out in this paper.Through establishing finite element model of subgrade,selecting the suitable boundary condition,the initial condition and the heat computation parameter,we have calculated the subgrade deformation field during three years based on change of ground temper... |
| Keywords: | permafrost soil temperature field subgrade deformation numerical analysis |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |