| 青藏铁路新型路基保温材料应用试验研究 |
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| 引用本文： | 苏谦,王迅,刘深. 青藏铁路新型路基保温材料应用试验研究[J]. 西南交通大学学报, 2007, 42(4): 395-399 |
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| 作者姓名： | 苏谦 王迅 刘深 |
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| 作者单位： | 西南交通大学土木工程学院,四川,成都,610031 |
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| 基金项目： | 铁道部科技开发计划项目(2001G001-B-03) |
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| 摘 要： | 为考察聚苯乙烯泡沫板(EPS)和聚氨酯泡沫板(PU)的工程应用效果,在青藏铁路多年冻土路基试验段进行了现场测试.结果表明,2种新型保温材料均具有较好的保温隔热性能,且PU板优于EPS板,保温性能与板厚之间存在非线性关系.较之对比断面,有保温板的断面基底年平均地温降低,上限抬升,有利于保护多年冻土.动态行车试验表明,保温板路基满足列车以100 km/h的速度运行的安全性与舒适性要求.
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| 关 键 词： | 青藏铁路 保温材料 多年冻土 路基 |
| 文章编号： | 0258-2724（2007）04-0395-05 |
| 修稿时间： | 2006-10-15 |
In-situ Test on Engineering Application of New Thermal-Insulation Materials in Qinghai-Tibet Railway Subgrade |
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| SU Qian,WANG Xun,LIU Shen. In-situ Test on Engineering Application of New Thermal-Insulation Materials in Qinghai-Tibet Railway Subgrade[J]. Journal of Southwest Jiaotong University, 2007, 42(4): 395-399 |
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| Authors: | SU Qian WANG Xun LIU Shen |
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| Affiliation: | School of Civil Eng. , Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | In order to investigate the engineering effect of expanded polystyrene(EPS) and expanded polyurethane(PU),an in-situ test was performed for permafrost subgrade on the Qinghai-Tibet railway.The results indicate that both the materials have a good thermal-insulation property,and the PU is better than the EPS.The relationship between thermal-insulation capability and material thickness is nonlinear.Compared with the non-insulation sections,the annual ground temperature of the thermal-insulation embankment is decreased,the permafrost table is raised,and so the permafrost is protected well.A dynamic test shows that the thermal-insulation subgrade can satisfy the needs of running security and comfort of trains at a speed of 100 km/h. |
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| Keywords: | Qinghai-Tibet railway thermal-insulation material permafrost subgrade |
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