摘要
由于根河—拉布大林公路(根拉公路)穿越东北高纬度多年冻土区,受冻融循环影响严重,其稳定性监测对公路的安全运营和日常养护至关重要。首先利用多时相InSAR技术分析了2016—2020年覆盖根拉公路的Sentinel-1数据,提取了公路及其沿线地区的线性位移速率和季节性位移振幅;然后开展区域线性形变和季节性形变的热点分析,并通过小波变换定量研究地表形变与温度的相关性。结果表明,研究区最大线性位移速率为69.97 mm/a,最大季节性位移振幅为26.34 mm;根拉公路整体路基稳定,但部分路段存在不均匀变形,且受明显的冻融灾害影响;地表形变与温度的共同周期约为374 d,地表形变滞后于温度约38 d。
The Genhe-Labulin Highway(Gen-La Highway)passes through the high-latitude permafrost region in Northeast China and is significantly affected by freeze-thaw cycles.Therefore,its stability monitoring is crucial for ensuring safe operation and routine maintenance.We used multi-temporal InSAR technology to analyze Sentinel-1 data from 2016 to 2020 covering the Gen-La Highway,and extracted the linear displacement speed and seasonal displacement amplitude of the Gen-La Highway and its surrounding areas at first.Then,we conducted a hotspot analysis of regional linear and seasonal deformation,and used wavelet transform to quantitatively investigate the correlation between surface deformation and temperature.The results show that the maximum linear displacement speed in the study area reaches 69.97 mm/a,while the maximum seasonal displacement amplitude is 26.34 mm.The overall roadbed of the Gen-La Highway remains stable,but some sections experience uneven deformation and significant freeze-thaw damage.The common period of surface deformation and temperature is approximately 374 days,with surface deformation lagging behind temperature by about 38 days.
作者
陈薇
王盼
张丽
史绪国
CHEN Wei;WANG Pan;ZHANG Li;SHI Xuguo(School of Geography and Information Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China)
出处
《地理空间信息》
2025年第7期11-16,共6页
Geospatial Information
基金
国家自然科学基金资助项目(42474061)。
