Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway
文献类型：期刊论文
| 作者 | Li Guoyu1; Mu Yanhu1; Zhang Xia2 |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2009 |
| 卷号 | 83期号:5页码:1000-1007 |
| 关键词 | Qinghai-Tibet railway climate change embankment with crushed rock side slope numerical analysis thaw settlement |
| ISSN号 | 1000-9515 |
| 通讯作者 | Li Guoyu(guoyuli@lzb.ac.cn) |
| 英文摘要 | Permafrost (perennially frozen ground) appears widely in the Golmud-Lhasa section of the Qinghai-Tibet railway and is characterized by high ground temperature (>= -1 degrees C) and massive ground ice. Under the scenarios of global warming and human activity, the permafrost under the railway will gradually thaw and the massive ground ice will slowly melt, resulting in some thaw settlement hazards, which mainly include longitudinal and lateral cracks, and slope failure. The crushed rock layer has a thermal semiconductor effect under the periodic fluctuation of natural air. It can be used to lower the temperature of the underlying permafrost along the Qinghai-Tibet railway, and mitigate the thaw settlement hazards of the subgrade. In the present paper, the daily and annual changes in the thermal characteristics of the embankment with crushed rock side slope (ECRSS) were quantitatively simulated using the numerical method to study the cooling effect of the crushed rock layer and its mitigative ability. The results showed that the ECRSS absorbed some heat in the daytime in summer, but part of it was released at night, which accounted for approximately 20% of that absorbed. Within a year, it removed more heat from the railway subgrade in winter than that absorbed in summer. It can store approximately 20% of the "cold" energy in subgrade. Therefore, ECRSS is a better measure to mitigate thaw settlement hazards to the railway. |
| 收录类别 | SCI |
| WOS关键词 | PERMAFROST ; PLATEAU |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000271625000018 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556183 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Li Guoyu |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, CAREERI, Lanzhou 730000, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Guoyu,Mu Yanhu,Zhang Xia. Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2009,83(5):1000-1007. |
| APA | Li Guoyu,Mu Yanhu,&Zhang Xia.(2009).Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway.ACTA GEOLOGICA SINICA-ENGLISH EDITION,83(5),1000-1007. |
| MLA | Li Guoyu,et al."Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway".ACTA GEOLOGICA SINICA-ENGLISH EDITION 83.5(2009):1000-1007. |
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来源：寒区旱区环境与工程研究所
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