TerraSAR的首都机场形变特征分析Analysis of land subsidence features based on TerraSAR images in Beijing-capital international airport
何亚乐,朱琳,宫辉力,王荣
摘要(Abstract):
针对首都机场的地表形变问题,该文采用永久散射体干涉测量技术,对2010—2013年间33景高分辨率TerraSAR(升轨)数据进行处理,获取首都机场地表形变的时空变化特征;分析了地下水水位与地面形变的关系,以及地表动静载荷对地面形变的影响。结果表明:PSInSAR获取的测量结果精度较高,与水准测量结果相比误差仅为1.08mm;首都机场及其附近区域存在不同程度的地表形变,机场西北部区域沉降速率明显大于东南部;T1航站楼沉降速度较快达到45mm/a,T2航站楼存在不均匀沉降现象,北端沉降速率明显大于南端;地表形变与地下水位变化过程存在一致性,并有季节性信息,每年冬春两季沉降量大于夏秋两季;地面动静载荷的不均匀分布是地表出现不均匀沉降的原因之一,动静载荷较大的西侧跑道、T1、T2航站楼区域沉降速率明显大于其他区域。
关键词(KeyWords): 地面沉降;PSInSAR;地下水水位;季节性形变;地表动静载荷
基金项目(Foundation): 国家自然科学基金项目(41201420,41130744)
作者(Author): 何亚乐,朱琳,宫辉力,王荣
DOI: 10.16251/j.cnki.1009-2307.2016.12.004
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