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针对2014-09-01大树场镇大面积山体滑坡灾后稳定性,从IBIS-L地基雷达形变测量原理和关键技术(步进频率连续波和合成孔径雷达)入手,给出地基InSAR数据处理流程,获得了滑坡灾后高精度、高时空分辨率的形变演化特征,测量精度达到亚mm级。地基InSAR结果表明,滑坡体滑动幅度较大的区域位于滑坡体左侧中上部(120mm)和右侧中上部(75mm)。滑动主要由堆积松散土在裂隙水、雨水等作用下造成,产生较大次生灾害的可能性较小。
Aiming at the post-disaster stability of landslides over a large area in Dashu Township from 2014-09-01, the ground-based InSAR data processing flow is given based on the principles and key technologies of IBIS-L ground-based radar deformation measurement (step frequency continuous wave and synthetic aperture radar) , The deformation and evolution characteristics of high precision and high spatio-temporal resolution after landslide disaster were obtained, and the measurement accuracy reached sub-mm level. The foundation InSAR results show that the landslide sliding area is located in the upper left (120mm) and the right middle (75mm) of the landslide. Sliding is mainly caused by the accumulation of loose soil under the action of fissure water and rainwater, which makes it less likely to produce major secondary disasters.