THE LANDSLIDE RISK ASSESSMENT ALONG SIGNIFICANT LINEAR PROJECTS:A CASE OF 500KV TRANSMISSION LINE NAMED LUMAO LINE

To date, landslide risk assessment along linear projects is limited. Evaluation indexes based on hazard inducing environment, trigger conditions and disaster characteristics of landslide disaster and the property characteristics, exposure and resilience of disaster body are selected in this study. The evaluation method of contribution weight approach is applied to the risk quantitative evaluation of Lumao line experimentally. Risk grading and mapping are done in GIS system by natural breaks method and the acceptable risk level of the transmission line landslide disaster is quantitative analyzed. It is showed that lines of high vulnerability are lines of N5~N8,N30~N34. To prevent damage of those transmission lines, corresponding protection measures to geological hazards should be built. This method can provide technical support for risk management and selection of significant linear engineering affected by the landslide disaster.