Application Of Aerial Photogrammetry Based On Light And Small Unmanned Aerial Vehicle In Geometric Information Survey Of High And Steep Slope

With the continuous development of the times,the continuous progress of technology and innovation,we have all aspects of working life have improved leap,humane,intelligent,digital continuous improvement,some traditional means can not be solved,more difficult problems to be solved,Complex problems can be simplified.The evaluation of the stability of high and steep slopes has been one of the important topics in the fields of rock mechanics,engineering geology and geological disasters.Accurate,reliable,complete,and detailed access to geometric information for high-risk slopes plays a vital role in assessing its stability.However,in the ever-changing technology today,the main means of geological survey also compass,tape and other means to collect data on-site,these methods work large,inefficient,and sometimes also facing great danger.Some of the site slope high side steep,investigators can not directly have to give up the investigation,or based on experience to estimate,so the accuracy of the data obtained is not guaranteed.The steep geological survey is very difficult and dangerous.Most of the time,due to the tight construction period,excavation,support and transportation work is often carried out at the same time,it is difficult for the investigators to provide sufficient time and sufficient safety space for accurate and timely Of the field investigation.In addition,in recent years,most of our projects in the mountains,high and steep slope investigation and treatment of most of the time to become the primary task of the project.It is very important to get timely and accurate access to geometric information of high and steep slope.In the face of the above problems is undoubtedly to the geology and geotechnical survey workers accustomed to the traditional means of investigation and challenge the new requirements.In recent years,some scholars have put forward different methods and ideas of advancing with the times,such as digital close-range photogrammetry,3D laser scanners,etc.,try to replace the traditional measurement methods,these methods also have some inconvenience.In this paper,the PIX4D aerial image interpretation software is used to interpret the image,and the accuracy of the three-dimensional coordinate data is evaluated,and then the different coordinates are obtained.And the geometrical information of the rock mass,and the geometric information of the rock mass are calculated.Finally,the engineering evaluation of the dangerous rock is combined with the engineering example.The method of this paper can effectively reduce the economic cost and labor cost of geological survey,improve the accuracy of survey and provide the convenience for geological workers.