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| DOI | 10.21782/KZ1560-7496-2017-4(43-57) |
| Deformation of railway subgrade upon permafrost and stabilization measures | |
| Dydyshko P.I. | |
| 发表日期 | 2017 |
| ISSN | 15607496 |
| 卷号 | 21期号:4 |
| 英文摘要 | The paper presents results of experimental studies of subgrade deformation in permafrost areas and measures for its stabilization. Deformation results from heat transfer changes caused by railway construction and operation. An embankment loads the cryotic soil like a hot press which lowers the permafrost table to 6-10 m below the superstructure and causes melting of ground ice. The subsequent extrusion of thawed yielding muddy soil from beneath the subgrade leads to decades-long soil subsidence. As a result, the subgrade experiences settlement and lateral spreads, especially in poorly drained soils with a moss-grass-peat cover. As shown by experiments, native soil under the subgrade is mechanically weak and prone to rheological changes (plastic fl ow) that induce uneven subgrade settlement. Moisture migration in thawing soil is driven by thermo-electrokinetic forces in thermally anisotropic capillary systems. Possible subgrade stabilization measures include ground freezing under slopes and creating mechanical barriers to soil extrusion. A number of respective engineering solutions have been suggested and experimentally tested. |
| 英文关键词 | Permafrost; Railway subgrade; Retaining structures; Soil freezing; Subgrade settlement and lateral spreads |
| 学科领域 | anisotropy; deformation; embankment; freezing; ground settlement; heat transfer; melting; permafrost; railway; retaining wall; rheology; slope; soil-structure interaction; stabilization; subgrade; Bryophyta |
| 语种 | 英语 |
| scopus关键词 | anisotropy; deformation; embankment; freezing; ground settlement; heat transfer; melting; permafrost; railway; retaining wall; rheology; slope; soil-structure interaction; stabilization; subgrade; Bryophyta |
| 来源期刊 | Earth's Cryosphere
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119493 |
| 作者单位 | Stock Company Railway Transport Research Institute, 10, 3rd Mityschinskaya str., Moscow, 129626, Russian Federation |
| 推荐引用方式 GB/T 7714 | Dydyshko P.I.. Deformation of railway subgrade upon permafrost and stabilization measures[J],2017,21(4). |
| APA | Dydyshko P.I..(2017).Deformation of railway subgrade upon permafrost and stabilization measures.Earth's Cryosphere,21(4). |
| MLA | Dydyshko P.I.."Deformation of railway subgrade upon permafrost and stabilization measures".Earth's Cryosphere 21.4(2017). |
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