A NEW TECHNOLOGY FOR RAILWAY ENGINEERING SURVEYING AND INVESTIGATION: UNMANNED AERIAL VEHICLE REMOTE SENSING

摘要

High precision Unmanned Aerial Vehicle Remote Sensing (UAV-RS) is an advanced surveying and investigation technology developing rapidly in recent years.Compared with conventional airborne remote sensing application to engineering geological investigation, UAV-RS technology can improve work condition with advantages of high flexibility, low cost, high efficiency and up-to-date situation acquisition.Especially, it has very important engineering significance for quick and urgent geological disaster reconnaissance along transportation lines.In the paper, some aspects of application to transportation-line (pipeline, highway and railway) engineering geological investigation were discussed.The concerned key points, including components of UAV-RS system,data processing workflow and image interpretation were analyzed.As a case study, a UAV-RS application project for transportation-line geological disaster investigation was given.The utilization of this new remote sensing technology successfully collected and discovered potential geological disasters and provided scientific data for timely decision-making.