Application of UAV Photogrammetry and Ground 3D Laser Scanning in Geohazard Investigation of a Highway Collapse in Ebian County
In the geological disaster investigation of a highway in Ebian County,due to the high and steep"V"type canyon slope cut foot,the highway formed a high and steep free surface,there are large complex dangerous rock mass,so the traditional ground investigation method has limitations.In order to effectively identify the development characteristics of the collapse and identify the potential hidden geological hazards of the high level,the UAV photogrammetry"plane"and the ground 3D laser scanning technology"facade"are combined to better obtain the 3D model of the collapse threatened rock mass and high-precision point cloud data.Taking the collapse of a road in Exian County as an example,the spatial distribution of dangerous rock mass is effectively identified by the method,and two dangerous rock masses with a total surface area of 681.51m2and a volume of 0.22×104m3 are interpreted,and five groups of cracks are interpreted.The model and development trend of instability are analyzed to provide basic data for subsequent stability analysis and disaster management.
3D laser scanning3D orthophotocollapseinvestigationEbian
万方数据
维普
