The thermal effect of strengthening measures in an insulated embankment in a permafrost region | |
Hou Yandong1,3; Wu Qingbai1,2; Liu Yongzhi1,2; Zhang Zhongqiong1; Gao Siru1,3 | |
刊名 | Cold regions science and technology |
2015-08-01 | |
卷号 | 116页码:49-55 |
关键词 | Qinghai-xizang railway Strengthening measures Permafrost table Second rising process |
ISSN号 | 0165-232X |
DOI | 10.1016/j.coldregions.2015.04.003 |
通讯作者 | Wu qingbai(qbwu@lzb.ac.cn) |
英文摘要 | An embankment with heat insulation can only retard a rise in temperature or the thawing of permafrost, and the thermal stability of the embankment cannot be maintained under global warming conditions. therefore, strengthening measures are required to ensure embankment stability. based on in-situ observational data from the qinghai-xizang railway in beiluhe, variations in the thermal regime under a thermally insulated embankment after the implementation of strengthening measures were analysed. the results show that the strengthening measure of thermosyphon installation can play an effective role in the embankment cooling process; however, no protective effect of the spall rock revetment was observed. the shallow mean annual maximum temperature in the upper 0.5 m of soil decreased from 2.2 to 0 degrees c with an average of 1.8 degrees c, appearing as a striking "cold energy accumulation" process which predominantly results from thermosyphons and heat insulation material, after the strengthening measures were implemented. meanwhile, the permafrost table under the embankment appeared as a "second rising process", ranging from 0.90 m for dk1139 + 670 to 2.56 m for dk1139 + 780, with an average of 1.66 m. the "sunny shady slope effect" was not well controlled after the implementation of the strengthening measures under the embankment with thermal insulation. however, the difference in temperature between the ground and underlying permafrost table, under the left and right shoulder of the embankment, gradually decreased. besides, thermal influence of the embankment to the surrounding permafrost in the deep layer is observed to be eliminated after the implementation of the strengthening measures. (c) 2015 elsevier b.v. all rights reserved. |
WOS关键词 | PROTECTION ; THERMOSIPHON ; HIGHWAY ; PLATEAU ; RAILWAY ; SLOPES |
WOS研究方向 | Engineering ; Geology |
WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000356122800006 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2376742 |
专题 | 中国科学院大学 |
通讯作者 | Wu Qingbai |
作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Engn, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Beiluhe Observat & Res Stn, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Sch Resources & Environm, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Hou Yandong,Wu Qingbai,Liu Yongzhi,et al. The thermal effect of strengthening measures in an insulated embankment in a permafrost region[J]. Cold regions science and technology,2015,116:49-55. |
APA | Hou Yandong,Wu Qingbai,Liu Yongzhi,Zhang Zhongqiong,&Gao Siru.(2015).The thermal effect of strengthening measures in an insulated embankment in a permafrost region.Cold regions science and technology,116,49-55. |
MLA | Hou Yandong,et al."The thermal effect of strengthening measures in an insulated embankment in a permafrost region".Cold regions science and technology 116(2015):49-55. |
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