Numerical analysis for critical height of railway embankment in permafrost regions of qinghai-tibetan plateau
文献类型：期刊论文
| 作者 | Zhang, MY; Zhang, JM; Lai, YM |
| 刊名 | Cold regions science and technology
 |
| 出版日期 | 2005-02-01 |
| 卷号 | 41期号:2页码:111-120 |
| 关键词 | Railway embankment Mean annual air temperature Critical embankment height Numerical analysis |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2004.09.001 |
| 通讯作者 | Zhang, my(myzhang@ns.lzb.ac.cn) |
| 英文摘要 | In permafrost regions of qinghai-tibetan plateau, the critical embankment height must be considered in the process of the construction of railway, especially for the global climatic warming. in this paper, the two-dimensional numerical analysis for the critical embankment height (for coarse-grained soil) has been performed by using the finite element method. the mean annual air temperatures used in the calculation are -6.5, -6.0, -5.5, -5.0, 4.5 and -4.0 degreesc, respectively, and the value of temperature rise is taken as 1.10 degreesc in the coming 50 years. the minimum embankment heights derived from the analysis are 0.85, 0.92, 1.01, 1.18, 1.60 and 2.66 m for the different mean annual air temperatures, and the maximum embankment heights are 7.68, 7.55, 7.34, 7.00, 6.45 and 5.85 m, accordingly. on condition that the service life of railway embankment is 50 years, the critical value of the mean annual air temperature is -3.5 degreesc. namely, in the areas where the mean annual air temperature is higher than -3.5 c, the critical embankment height does not exist. furthermore, by calculating, we can find that no matter whether high or low embankment is constructed, the ground temperature under the embankment will rise, and the permafrost will be in a degradation situation, which has been confirmed by the field observation data at qinghai-tibetan railway test sites. (c) 2004 elsevier b.v. all rights reserved. |
| 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:000227209200003 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377180 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang, MY |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, MY,Zhang, JM,Lai, YM. Numerical analysis for critical height of railway embankment in permafrost regions of qinghai-tibetan plateau[J]. Cold regions science and technology,2005,41(2):111-120. |
| APA | Zhang, MY,Zhang, JM,&Lai, YM.(2005).Numerical analysis for critical height of railway embankment in permafrost regions of qinghai-tibetan plateau.Cold regions science and technology,41(2),111-120. |
| MLA | Zhang, MY,et al."Numerical analysis for critical height of railway embankment in permafrost regions of qinghai-tibetan plateau".Cold regions science and technology 41.2(2005):111-120. |
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来源：中国科学院大学
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