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| Application of LIDAR Technology in Geological Hazard Investigation and Monitoring |
| FENG Guang - sheng |
| China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430063，China |
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Abstract Research purposes ： Unfavorable geological survey is one of the important contents of engineering geological investigation in mountain railway and highway construction projects, to determine the distribution range, the size and influence of the unfavorable geological condition. There are defects in large workload, long cycle, low efficiency, low accuracy and high safety risks in artificial investigation with navigation and satellite interpretation, and it is unable to meet the need of constantly improve in the construction quality, safety and efficiency. Through the scanning of laser radar for the unfavorable geological conditions, its 3D information can be fast acquired, its spatial size, position and distribution are determined, and more accurate data is provided for engineering geological investigation.
Research conclusions :(1) The different angle mountain shadow map by using DEM from lidar can accurately express the micro landform，and be advantageous to distinguish of geological disasters. (2) The boundary of slope, collapse and ground subsidence can be determined by means of lidar gradient image and DOM. (3) The slope deformation and ground subsidence can be dynamically monitored by means of lidar data of different periods. (4) The technique is effective for the unfavorable geological survey and monitoring of geological survey of railway and highway engineering, it has the characteristics of real — time, dynamic and initiative, which overcomes the defects of the traditional manual
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Received: 31 March 2014
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2014, Vol. 31 
