Experimental and numerical investigation on temperature characteristics of in-cuts roadbed in Qinghai-Tibetan railway
文献类型:期刊论文
作者 | Zhang, Mingyi; Lai, Yuanming; Zhang, Jianming; Li, Shuangyang |
刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
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出版日期 | 2006-11-01 |
卷号 | 46期号:2页码:113-124 |
关键词 | temperature characteristics in-cuts roadbed insulation crushed rock imported fill Qinghai-Tibetan railway |
ISSN号 | 0165-232X |
DOI | 10.1016/j.coldregions.2006.07.005 |
通讯作者 | Lai, Yuanming(ymlai@lzb.ac.cn) |
英文摘要 | By analyzing the temperature characteristics and damages of the experimental in-cuts roadbed at Beiluhe site of Qinghai-Tibetan railway, we find that it is difficult to ensure the stability of the in-cuts roadbed in warm permafrost regions if it is filled with coarse-grained soil with a low water content at the roadside slopes and bottom, and insulation is only embedded in its bottom imported fill layer. Therefore, in this paper, two in-cuts roadbed structures, i.e., insulated structure with insulation embedded in imported fill layers at the bottom and side slopes, and crushed-rock structure with insulation only embedded in imported fill layer at the side slopes and crushed rock filled at the bottom, are proposed. The numerical analyses indicate that, in the areas where the mean annual air temperature is -4.0 degrees C and under the assumption that the mean annual air temperature will be warmed by 1.0 degrees C in the future 50 years, the insulated structure can ensure the stability of its side slopes, however, the bottom settlement can not be effectively controlled; The crushed-rock structure can not only keep the permafrost table in the imported fill layer and ensure the stability of the side slopes, but also cool down the underlying permafrost and control the bottom settlement. Therefore, when the in-cuts roadbed must be constructed in warm permafrost regions, the crushed-rock structure can be an effective approach to ensure the safety of roadway. (c) 2006 Elsevier B.V. All rights reserved. |
收录类别 | SCI |
WOS关键词 | PERMAFROST REGIONS ; EMBANKMENTS ; CONVECTION |
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:000241937500003 |
出版者 | ELSEVIER SCIENCE BV |
URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555830 |
专题 | 寒区旱区环境与工程研究所 |
通讯作者 | Lai, Yuanming |
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,Zhang, Jianming,et al. Experimental and numerical investigation on temperature characteristics of in-cuts roadbed in Qinghai-Tibetan railway[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2006,46(2):113-124. |
APA | Zhang, Mingyi,Lai, Yuanming,Zhang, Jianming,&Li, Shuangyang.(2006).Experimental and numerical investigation on temperature characteristics of in-cuts roadbed in Qinghai-Tibetan railway.COLD REGIONS SCIENCE AND TECHNOLOGY,46(2),113-124. |
MLA | Zhang, Mingyi,et al."Experimental and numerical investigation on temperature characteristics of in-cuts roadbed in Qinghai-Tibetan railway".COLD REGIONS SCIENCE AND TECHNOLOGY 46.2(2006):113-124. |
入库方式: iSwitch采集
来源:寒区旱区环境与工程研究所
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