辽宁工程技术大学安全科学与工程学院,辽宁,葫芦岛,125105
纸质出版:2023
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董建军. 高海拔排土场边坡安全稳定性的PS⁃InSAR监测[J]. 防灾减灾工程学报, 2023,43(1):149-157.
董建军,梅媛,闫斌,刘士乙.高海拔排土场边坡安全稳定性的PS⁃InSAR监测[J].防灾减灾工程学报,2023,43(1):149-157
为了解决高海拔排土场边坡灾害监测难度大以及安全稳定性预警等问题,提出利用 PS-InSAR 技术对高海拔排土场边坡进行安全稳定性监测分析。通过对西藏山南桑日县某排土场边坡进行监测分析研究,采用 2018 年 11 月 04 日至 2020 年 12 月 23 日的 25 景 Sentinel-1A 数据,利用时序差分干涉相位的时空分析方法,进行差分干涉、模型迭代计算和地理编码等解算,解算得到平均形变速率分布,基于平均形变速率结果分析该排土场边坡的安全稳定性。结果表明:利用 PS-InSAR 技术能够获取排土场边坡区域的地表形变信息;该研究区域坡体 2018 年 11 月至 2020 年 12 月的平均形变速率最大值为 -20.00 mm/a,最大形变速率区域出现在排土场边坡的下部 ;通过 PS-InSAR 技术能够对其安全稳定状态进行准确评价,并进行预警预报,为排土场边坡的安全稳定服役提供有效技术保证。
In order to solve the problems associated with monitoring high-altitude dump slope disasters and provide early warning for safety and stability, the permanent scattered InSAR technology was pro- posed to monitor and analyze the safety and stability of high-altitude dump slope. The slope of a dump in Sangri County, Shannan, Tibet was monitored and analyzed using 25 Sentinel-1A data sets from November 4,2018 to December 23,2020. In this study, the spatio-temporal analysis method of tem- poral difference interference phase was adopted, and the average deformation rate map was obtained through interference workflow processing, model inversion, and geographic coding. Based on the re- sults of the average deformation rate, an analysis of the safety and stability of the dump slope was con- ducted. The results show that the PS-InSAR technology can be used to obtain surface deformation in- formation of the dump slope area. The maximum average deformation rate for the slope in the study ar- ea from November 2018 to December 2020 was ? 20.00 mm per year, and the maximum deforma- tion rate area appeared in the lower part of the dump slope. The PS-InSAR technology can accurately evaluate the slope’s safety and stability and offer early warning and prediction, thereby providing ef- fective technical support for the safe and stable service of the dump slope.
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