Geological Hazard Risk Evaluation for Railway Network of Guizhou Province in China
In recent years, China’s high-speed railway has experienced a period of rapid development and being gradually rational. This paper took Guizhou Province as the study area, one of the places in China which are most seriously affected by landslide hazards. The research in this paper was conducted in three steps. Firstly, the landslide susceptibility mapping of railway was acquired by applying competition network model, and a set of conditioning factors were selected as the major landslide-conditioning factors, including elevation, lithology, rainfall, distance from river, distance from tectonic line, karst density and slope. Then, the concept of ‘degree of fitting’ was proposed in the assessment of railway risk degree, and it was regarded as one of the three elements which determine the railway protection grade on geological disasters. Finally, the matter-element model was established based on extension method, which can be used to evaluate the protection grades for the planned railway on geological disasters by integrating three elements, the train speed, grade of susceptibility mapping, and fitting degree, into the model.
The authors wish to acknowledge the support and motivation provided by Geological Hazard Susceptibility Mapping and Assessment in Basaltic Area (No: 2009318802074), and West Project of Ministry Communication, China (N0. 2009318000074).
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