Probabilistic analysis of the replacement thickness of the in-cuts roadbed in permafrost regions
文献类型：期刊论文
| 作者 | Wen, Zhi; Sheng, Yu; Ma, Wei; Wu, Qinghai; Wang, Dayan; Sun, Zhizhong; Li, Guoyu |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2010-10-01 |
| 卷号 | 64期号:1页码:57-67 |
| 关键词 | The first-order second moment method The Monte Carlo simulation Reliability In-cuts roadbed Permafrost |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2010.07.002 |
| 通讯作者 | Wen, Zhi() |
| 英文摘要 | Limited to terrain and road longitudinal gradient, it is inevitable to excavate permafrost for linearity engineering in permafrost regions such as railway and highway. It is a very complicated process for freezing-thawing cycle of the active layer due to parameters variability and complex climate. Moreover, there are scarce data for ground temperature and deformation in in-cuts roadbed. A probabilistic approach may consider the influences of the variation of each significant parameter upon the factor of safety and has the particular advantages over the classical approach So it is frequently used to give a more rational assessment of the risks A probabilistic model is put forward to evaluate the replacement thickness of in-cuts roadbed in the permafrost regions, and the procedure is validated by the observation data in cutting of Qinghai-Tibetan railway The analysis results show that the thermal stability of the roadbed cannot be ensured if in-cuts roadbed is only displaced by coarse-grained soils The reliability can be improved greatly if the thermal-insulated material is embedded in the replacement layer The calculation results show that the maximum thawed depth of in-cuts roadbed will not be deeper than the replacement layer if the Extruded Polystyrenes (EPS) with a thickness of 10 0 cm is embedded at the depth of 08 m below the surface of the imported fill layer. The computation results also indicate that the in-cuts roadbed design in the Qinghai-Tibetan railway can protect the permafrost under the replacement layer from thawing and ensure the in-cuts roadbed stability in the coming fifty year The Monte Carlo simulation and the first-order second moment method are applied to establish the limit-state function of probabilistic analysis of the replacement thickness. The calculated results indicate that probabilistic approach can be used to determine the replacement thickness and can provide more reasonable suggestions for engineering application than the classical approach (C) 2010 Elsevier B V All rights reserved |
| 收录类别 | SCI |
| WOS关键词 | EMBANKMENT ; 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:000282624600006 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556392 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wen, Zhi |
| 作者单位 | CAS, CAREERI, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wen, Zhi,Sheng, Yu,Ma, Wei,et al. Probabilistic analysis of the replacement thickness of the in-cuts roadbed in permafrost regions[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2010,64(1):57-67. |
| APA | Wen, Zhi.,Sheng, Yu.,Ma, Wei.,Wu, Qinghai.,Wang, Dayan.,...&Li, Guoyu.(2010).Probabilistic analysis of the replacement thickness of the in-cuts roadbed in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,64(1),57-67. |
| MLA | Wen, Zhi,et al."Probabilistic analysis of the replacement thickness of the in-cuts roadbed in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 64.1(2010):57-67. |
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来源：寒区旱区环境与工程研究所
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