Estimating the stability of unprotected embankment in warm and ice-rich permafrost region
The purpose of this study is to estimate the stability of unprotected embankment in the warm and ice-rich permafrost (WIRP) region along the Qinghai-Tibet Railway. The estimation was based on field observations of the varying thermal regime under the unprotected embankments and of the ongoing settle...
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2010
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ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-25425 2024-04-28T08:23:34+00:00 Estimating the stability of unprotected embankment in warm and ice-rich permafrost region Qin, Yinghong Zhang, Jianming 2010-04-01T07:00:00Z https://digitalcommons.mtu.edu/michigantech-p/6123 https://doi.org/10.1016/j.coldregions.2009.12.001 unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/michigantech-p/6123 doi:10.1016/j.coldregions.2009.12.001 https://doi.org/10.1016/j.coldregions.2009.12.001 Michigan Tech Publications Active layer Bearing capacity Homogenized geothermal gradient Permafrost warming Qinghai-Tibet Railway Settlement induced by released water Department of Civil Environmental and Geospatial Engineering Civil and Environmental Engineering text 2010 ftmichigantuniv https://doi.org/10.1016/j.coldregions.2009.12.001 2024-04-03T17:05:08Z The purpose of this study is to estimate the stability of unprotected embankment in the warm and ice-rich permafrost (WIRP) region along the Qinghai-Tibet Railway. The estimation was based on field observations of the varying thermal regime under the unprotected embankments and of the ongoing settlement of this type of embankment. The observed data shows that on the one hand, the unprotected embankment could mitigate the frost heave of the subgrade by homogenizing the geothermal gradient and by decreasing the temperature fluctuation of the WIRP layers. On the other hand, leaving the embankment unprotected has led to the warming of the underlying WIRP layer. This layer releases a considerable amount of unfrozen water. However, the released water undergoes untimely drainage, leading to the ongoing settlement of the embankment. To stabilize the settlement, two recommendations are provided. For those existing unprotected embankments, using shading boards to cool down the underlying permafrost is recommended. For the future embankments constructed in WIRP regions, the inset trenches which are drilled perpendicularly to traffic are recommended to aid the drainage of the released water. Text Ice permafrost Michigan Technological University: Digital Commons @ Michigan Tech Cold Regions Science and Technology 61 1 65 71 |
institution |
Open Polar |
collection |
Michigan Technological University: Digital Commons @ Michigan Tech |
op_collection_id |
ftmichigantuniv |
language |
unknown |
topic |
Active layer Bearing capacity Homogenized geothermal gradient Permafrost warming Qinghai-Tibet Railway Settlement induced by released water Department of Civil Environmental and Geospatial Engineering Civil and Environmental Engineering |
spellingShingle |
Active layer Bearing capacity Homogenized geothermal gradient Permafrost warming Qinghai-Tibet Railway Settlement induced by released water Department of Civil Environmental and Geospatial Engineering Civil and Environmental Engineering Qin, Yinghong Zhang, Jianming Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
topic_facet |
Active layer Bearing capacity Homogenized geothermal gradient Permafrost warming Qinghai-Tibet Railway Settlement induced by released water Department of Civil Environmental and Geospatial Engineering Civil and Environmental Engineering |
description |
The purpose of this study is to estimate the stability of unprotected embankment in the warm and ice-rich permafrost (WIRP) region along the Qinghai-Tibet Railway. The estimation was based on field observations of the varying thermal regime under the unprotected embankments and of the ongoing settlement of this type of embankment. The observed data shows that on the one hand, the unprotected embankment could mitigate the frost heave of the subgrade by homogenizing the geothermal gradient and by decreasing the temperature fluctuation of the WIRP layers. On the other hand, leaving the embankment unprotected has led to the warming of the underlying WIRP layer. This layer releases a considerable amount of unfrozen water. However, the released water undergoes untimely drainage, leading to the ongoing settlement of the embankment. To stabilize the settlement, two recommendations are provided. For those existing unprotected embankments, using shading boards to cool down the underlying permafrost is recommended. For the future embankments constructed in WIRP regions, the inset trenches which are drilled perpendicularly to traffic are recommended to aid the drainage of the released water. |
format |
Text |
author |
Qin, Yinghong Zhang, Jianming |
author_facet |
Qin, Yinghong Zhang, Jianming |
author_sort |
Qin, Yinghong |
title |
Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
title_short |
Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
title_full |
Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
title_fullStr |
Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
title_full_unstemmed |
Estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
title_sort |
estimating the stability of unprotected embankment in warm and ice-rich permafrost region |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2010 |
url |
https://digitalcommons.mtu.edu/michigantech-p/6123 https://doi.org/10.1016/j.coldregions.2009.12.001 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Michigan Tech Publications |
op_relation |
https://digitalcommons.mtu.edu/michigantech-p/6123 doi:10.1016/j.coldregions.2009.12.001 https://doi.org/10.1016/j.coldregions.2009.12.001 |
op_doi |
https://doi.org/10.1016/j.coldregions.2009.12.001 |
container_title |
Cold Regions Science and Technology |
container_volume |
61 |
container_issue |
1 |
container_start_page |
65 |
op_container_end_page |
71 |
_version_ |
1797584437003681792 |