| EPS保温板在青藏铁路中应用的适用性评价数值模拟 |
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| 引用本文： | 温智,盛煜,马巍,吴吉春.EPS保温板在青藏铁路中应用的适用性评价数值模拟[J].铁道学报,2005,27(3):91-96. |
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| 作者姓名： | 温智 盛煜 马巍 吴吉春 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃,兰州,730000 |
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| 基金项目： | 中国科学院知识创新工程重大项目(KZCX1-SW-04);"973"国家重点基础研究发展规划项目(2002CB412704);国家自然科学基金重大项目(90102006) |
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| 摘 要： | 保护冻土原则是多年冻土区路基设计的首要要求。本文运用带相变瞬态温度场有限元数值解法,模拟分析铺设聚苯乙烯(EPS)板后铁路路基下多年冻土最大融化深度在随后50a内随时间的变化,提出保温板铺设的适宜位置;总结分析保温板厚度和路基填土高度的关系;基于年平均气温给出多年冻土区铁路路基工程中保温材料的适用范围,并对多年冻土年平均地温对保温处理措施适用范围的影响进行了分析。
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| 关 键 词： | 多年冻土 保温板 青藏铁路 数值模拟 |
| 文章编号： | 1001-8360(2005)03-0091-06 |
| 修稿时间： | 2004年2月3日 |
Numerical Simulation on Application of EPS in Embankment Engineering of Qinghai-Tibet Railway |
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| WEN Zhi,SHENG Yu,MA Wei,WU Ji-chun.Numerical Simulation on Application of EPS in Embankment Engineering of Qinghai-Tibet Railway[J].Journal of the China railway Society,2005,27(3):91-96. |
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| Authors: | WEN Zhi SHENG Yu MA Wei WU Ji-chun |
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| Abstract: | Protecting permafrost from further thaw due to human activities is the first choice for embankment design in permafrost regions for many years. Two dimensional finite element analyses are conducted, in which phase changes are taken into consideration to simulate the thermal regime of the Qinghai-Tibetan railway with Expanded Polystyrene (EPS) boards. Based on the predicted maximum thaw depth in the following 50 years, the best position for insulation boards is presented and the relationship between the thickness of insulation and the height of embankment is analyzed. The applicable range of insulation in embankment engineering of the Qinghai-Tibetan railway in terms of Mean Annual air temperature (MAAT) is suggested and the influence of the geothermal field of permafrost on the applicable range of insulation is discussed. |
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| Keywords: | permafrost insulation board Qinghai-Tibet Railway numerical simulation |
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