Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology
Permafrost areas pose a threat to the safe operation of linear projects such as the Qinghai–Tibet railway due to the repeated alternating effects of frost heaving and thawing settlement of frozen soil in permafrost area. Time series InSAR technology can effectively obtain ground deformation informat...
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Multidisciplinary Digital Publishing Institute
2023
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Online Access: | https://doi.org/10.3390/land12020474 |
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ftmdpi:oai:mdpi.com:/2073-445X/12/2/474/ 2023-08-20T04:09:10+02:00 Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology Hui Liu Songbo Huang Chou Xie Bangsen Tian Mi Chen Zhanqiang Chang agris 2023-02-14 application/pdf https://doi.org/10.3390/land12020474 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/land12020474 https://creativecommons.org/licenses/by/4.0/ Land; Volume 12; Issue 2; Pages: 474 MT-InSAR frozen soil deformation Qinghai–Tibet corridor roadbed deformation climate response Text 2023 ftmdpi https://doi.org/10.3390/land12020474 2023-08-01T08:48:32Z Permafrost areas pose a threat to the safe operation of linear projects such as the Qinghai–Tibet railway due to the repeated alternating effects of frost heaving and thawing settlement of frozen soil in permafrost area. Time series InSAR technology can effectively obtain ground deformation information with an accuracy of up to millimeters. Therefore, it is of great significance to use time series InSAR technology to monitor the deformation of the permafrost section of the Qinghai–Tibet railway. This study uses multi-time InSAR (MT-InSAR) technology to monitor the deformation of the whole section of the Qinghai–Tibet railway, detect the uneven settlement of the railway roadbed in space, and detect the seasonal changes in the roadbed in the time domain. At the same time, the local deformation sections over the years are compared and discussed. The time series deformation monitoring results of the permafrost section Sentinel-1 data in 2020 show that the length of the railway roadbed from Tanggula station to Za’gya Zangbo station (TZ) section is approximately 620 m, the deformation of the east and west sides is uneven, and the average annual deformation difference is 60.68 mm/a. The impact of frozen soil in WangKun station to Budongquan station (WB) section on railway roadbed shows the distribution characteristics of high in the middle and low at both ends, and the maximum annual average settlement can reach −158.46 mm/a. This study shows that the deformation of permafrost varies with different ground layers. The impact of human activities on frozen soil deformation is less than that of topography and hydrothermal conditions. At the same time, the study determined that compared with other sections, the roadbed deformation of TZ and WB sections is more obvious. Text permafrost MDPI Open Access Publishing Land 12 2 474 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
MT-InSAR frozen soil deformation Qinghai–Tibet corridor roadbed deformation climate response |
spellingShingle |
MT-InSAR frozen soil deformation Qinghai–Tibet corridor roadbed deformation climate response Hui Liu Songbo Huang Chou Xie Bangsen Tian Mi Chen Zhanqiang Chang Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
topic_facet |
MT-InSAR frozen soil deformation Qinghai–Tibet corridor roadbed deformation climate response |
description |
Permafrost areas pose a threat to the safe operation of linear projects such as the Qinghai–Tibet railway due to the repeated alternating effects of frost heaving and thawing settlement of frozen soil in permafrost area. Time series InSAR technology can effectively obtain ground deformation information with an accuracy of up to millimeters. Therefore, it is of great significance to use time series InSAR technology to monitor the deformation of the permafrost section of the Qinghai–Tibet railway. This study uses multi-time InSAR (MT-InSAR) technology to monitor the deformation of the whole section of the Qinghai–Tibet railway, detect the uneven settlement of the railway roadbed in space, and detect the seasonal changes in the roadbed in the time domain. At the same time, the local deformation sections over the years are compared and discussed. The time series deformation monitoring results of the permafrost section Sentinel-1 data in 2020 show that the length of the railway roadbed from Tanggula station to Za’gya Zangbo station (TZ) section is approximately 620 m, the deformation of the east and west sides is uneven, and the average annual deformation difference is 60.68 mm/a. The impact of frozen soil in WangKun station to Budongquan station (WB) section on railway roadbed shows the distribution characteristics of high in the middle and low at both ends, and the maximum annual average settlement can reach −158.46 mm/a. This study shows that the deformation of permafrost varies with different ground layers. The impact of human activities on frozen soil deformation is less than that of topography and hydrothermal conditions. At the same time, the study determined that compared with other sections, the roadbed deformation of TZ and WB sections is more obvious. |
format |
Text |
author |
Hui Liu Songbo Huang Chou Xie Bangsen Tian Mi Chen Zhanqiang Chang |
author_facet |
Hui Liu Songbo Huang Chou Xie Bangsen Tian Mi Chen Zhanqiang Chang |
author_sort |
Hui Liu |
title |
Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
title_short |
Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
title_full |
Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
title_fullStr |
Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
title_full_unstemmed |
Monitoring Roadbed Stability in Permafrost Area of Qinghai–Tibet Railway by MT-InSAR Technology |
title_sort |
monitoring roadbed stability in permafrost area of qinghai–tibet railway by mt-insar technology |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/land12020474 |
op_coverage |
agris |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Land; Volume 12; Issue 2; Pages: 474 |
op_relation |
https://dx.doi.org/10.3390/land12020474 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/land12020474 |
container_title |
Land |
container_volume |
12 |
container_issue |
2 |
container_start_page |
474 |
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