Numerical study on temperature characteristics of expressway embankment with crushed-rock revetment and ventilated ducts in warm permafrost regions
文献类型：期刊论文
| 作者 | Zhang, Mingyi; Lai, Yuanming; Dong, Yuanhong |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 59期号:1页码:19-24 |
| 关键词 | Numerical study Temperature characteristic Expressway embankment Crushed-rock revetment Ventilated duct Warm permafrost region |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2009.06.001 |
| 通讯作者 | Zhang, Mingyi(myzhang@lzb.ac.cn) |
| 英文摘要 | The crushed-rock revetment embankment and duct-ventilated embankment, as effective cooling measures, have been used to protect the underlying permafrost from thawing in Qinghai-Tibet Railway construction of China. However, the two cooling measures cannot be directly applied to the expressways with a wide and high-temperature pavement surface in warm permafrost regions. Therefore, considering the heat transfer characteristics of crushed-rock revetment embankment and duct-ventilated embankment, we designed a new-type embankment with crushed-rock revetment and ventilated ducts. For cold regions engineering, the temperature is the most important factor that determines the stability of construction. To research the thermal stability of the new-type embankments according to the related theories of heat and mass transfer. a three-dimensional theoretical and numerical model for the embankment, which is composed of the coupled heat transfer problem between airflow and duct wall the air, convective heat transfer problem within crushed-rock layer, and the heat conduction problem with phase change in soil layers, was presented to analyze the temperature characteristics of the new-type embankment. Three points can be concluded from the numerical results based on the assumption that the air temperature will be warmed up by 2.6 degrees C in the next 50 years. First, the crushed-rock revetment embankment would be unstable because the crushed-rock revetment can reduce only the ground temperature at the side-slope foots of embankment, but the permafrost table descends severely in the middle. Second, the ventilated-duct embankment can effectively cool the soil at the middle of the embankment but not at the side-slope foots, so that the uneven temperature distributions would be deleterious to the stability of expressway. Third, the new-type embankment structure is effective to decrease the underlying ground temperature and to ensure the stability of expressway with a wide (multi-lane) and high-temperature upper surface in warm permafrost regions. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | TIBET RAILWAY |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000271369200004 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556203 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Mingyi |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingyi,Lai, Yuanming,Dong, Yuanhong. Numerical study on temperature characteristics of expressway embankment with crushed-rock revetment and ventilated ducts in warm permafrost regions[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2009,59(1):19-24. |
| APA | Zhang, Mingyi,Lai, Yuanming,&Dong, Yuanhong.(2009).Numerical study on temperature characteristics of expressway embankment with crushed-rock revetment and ventilated ducts in warm permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,59(1),19-24. |
| MLA | Zhang, Mingyi,et al."Numerical study on temperature characteristics of expressway embankment with crushed-rock revetment and ventilated ducts in warm permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 59.1(2009):19-24. |
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来源：寒区旱区环境与工程研究所
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