SBAS-InSAR monitoring of slope safety and stability of high altitude dumps

doi:10.16265/j.cnki.issn1003-3033.2022.01.013

Abstract

Abstract:

In order to solve the problem of high investment and high risk in the arrangement of conventional monitoring instruments and personnel on duty for monitoring of slope safety and stability of high-altitude dumps, Sentinel-1A data of 25 scenarios for a dump site in Sangri County, Shannan, Tibet were studied. SBAS-InSAR was used to monitor the surface deformation of the final dump's slope from November 4, 2018 to December 23, 2020. Then, baseline estimation state-space model, perform adaptive filtering and minimum cost stream were adopted for phase unwrapping, and image registration, interference processing and flat ground effect calculation were performed. Finally, considering the influence of temperature and rainfall on data in high-altitude areas across dry and wet seasons, an average deformation rate map was generated, and safe and stable states of the dump's slope were evaluated based on results of deformation monitoring. The results show that the maximum average deformation rate of the example from 2018 to 2020 was -13.9 0mm/a, and it reached the yellow warning threshold on June, 2020. With necessary preventive steps being taken, the settlement rate is effectively controlled and slowed down. The practical results indicate the application of SBAS-InSAR can achieve dynamic, comprehensive coverage, and long-term reliable monitoring of slope safety and stability of high-altitude dumps.

Key words: high altitude, dump slope, safety and stability, small baseline subset-interferometric synthetic aperture radar(SBAS-InSAR), deformation monitoring

DONG Jianjun, MEI Yuan, LI Xin, LIU Shiyi, YAN Bin. SBAS-InSAR monitoring of slope safety and stability of high altitude dumps[J]. China Safety Science Journal, 2022, 32(1): 92-101.

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序号	日期	序号	日期
1	2018-11-04	14	2020-01-22
2	2018-12-10	15	2020-02-27
3	2019-01-03	16	2020-03-22
4	2019-02-08	17	2020-04-03
5	2019-03-04	18	2020-05-09
6	2019-05-03	19	2020-06-26
7	2019-06-08	20	2020-07-20
8	2019-07-02	21	2020-08-13
9	2019-08-07	22	2020-09-06
10	2019-09-24	23	2020-10-24
序号	日期	序号	日期
11	2019-10-30	24	2020-11-17
12	2019-11-23	25	2020-12-23
13	2019-12-29