Building underground settlement monitoring method and monitoring system

The invention proposes a building underground settlement monitoring method and monitoring system, and relates to the technical field of settlement monitoring, and the method comprises the steps: carrying out the collection of point cloud data of all to-be-monitored regions through employing an airborne laser radar, and generating a three-dimensional vector data sequence; calculating a terrain deformation ratio sequence of a plurality of adjacent to-be-measured areas according to the three-dimensional vector data sequence; performing abrupt change position analysis on the terrain deformation ratio sequence of the plurality of adjacent to-be-detected areas, and determining a settlement hidden danger area; inputting a vibration signal to the hidden danger area, and determining a settlement abnormal position in the settlement hidden danger area based on the energy change of the vibration signal. 本发明提出了一种建筑物地下沉降监测方法及监测系统，涉及沉降监测技术领域，利用机载激光雷达对各个待测区域进行点云数据的采集,生成三维向量数据序列；根据所述三维向量数据序列计算多个相邻待测区域的地形形变比值序列；对所述多个相邻待测区域的地形形