高海拔排土场边坡安全稳定性D-InSAR监测  

D-InSAR monitoring of slope safety and stability at high altitude dumps

作　　者：董建军 梅媛[1,2] 闫斌 刘士乙 DONG Jian-jun;MEI Yuan;YAN Bin;LIU Shi-yi(College of Safety Science and Engineering,Liaoning Technical University,Huludao 125105,Liaoning,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao 125105,Liaoning,China;Tibet Base,Western Region,Huaxin Cement Co.,Ltd.,Shannan 856000,Tibet,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛125105 [2]辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室,辽宁葫芦岛125105 [3]华新水泥股份有限公司西部区域西藏基地,西藏山南856000 [4]东北大学资源与土木工程学院,沈阳110819

出　　处：《安全与环境学报》2022年第5期2514-2523,共10页Journal of Safety and Environment

基　　金：国家自然科学基金项目(52074148);辽宁省教育厅科学研究经费项目(LJ2020JCL019)。

摘　　要：为了确保高海拔排土场边坡预防滑坡灾害的安全稳定性监测的长期有效性和可靠性,通过对西藏山南桑日县某排土场边坡14景Sentinel-1A数据进行研究,利用D-InSAR双轨法差分干涉技术监测终了排土的排土场边坡2018-11-4—2020-12-23期间的地表形变,采用基线估计状态空间模型进行基线估计、自适应滤波去除图像噪声和最小费用流进行相位解缠,采用考虑温度及降雨影响的形变模型进行解算,结合多分辨率分析方法降低大气噪声的影响,进行影像配准、干涉处理和平地效应消除,生成干涉图与形变图,基于形变监测结果评判该排土场边坡的安全稳定状态。结果表明,2020年6月26日该研究区域坡体累积沉降值为34 mm,达到了黄色预警阈值,采取必要的防治措施后,累计沉降量得到了控制,沉降速率趋缓。实践表明D-InSAR技术应用于高海拔排土场边坡能够实现动态、大面积覆盖、长期可靠的安全稳定性监测。To ensure the long-term effectiveness and reliability when monitoring the slope safety and stability of high-altitude dumps to prevent landslide disasters,the Sentinel-1 A data of 14 sceneries on the slope of a dumpsite were studied in Sangri County,Shannan,Tibet.The D-InSAR was used to monitor the surface deformation of the final dump’s slope from November 4,2018,to December 23,2020.In the research process,the state-space model of baseline estimation was used for the baseline estimation,the adaptive filtering method was used to remove the filtering noise,the minimum cost flow unwrapping was used for the phase unwrapping,the DEM reflating was used for eliminating the residual terrain,the polynomial method was used for orbit refinement,and the multi-resolution analysis methods were used for reducing the impact of atmospheric noise.Combined with the deformation model that considered the effects of temperature and rainfall to solve,the interferogram and deformation map corresponding to the main image in each period were generated by the image registration,the interference processing,and the flatting effect.The safe and stable state of the slope of the dump was judged based on the results of deformation monitoring.The results show that the cumulative settlement value of the dump reached 34 mm on June 26,2020,which has reached the red warning threshold of the dump slope.By setting retaining wall reinforcement measures on the slope toe,the cumulative settlement of the dump slope was controlled,the settlement rate was slowed down,and the slope sliding trend was effectively solved.Through this study,it can be shown that the application of D-InSAR technology in high-altitude dump slopes can be used to realize the dynamic monitoring of landslides based on time series.The D-InSAR technology can also achieve large area coverage monitoring and long-term accurate and reliable safety and stability monitoring.

关 键 词：安全工程 高海拔 排土场边坡 安全稳定性 合成孔径雷达差分干涉测量(D-InSAR) 

分 类 号：X936[环境科学与工程—安全科学]