Abstract

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Title:: Regional risk evaluation of highway collapse induced by continuous rain in Shaanxi Province

Author(s):: QI Hong-liang; TIAN Wei-ping; LI Jia-chun; (Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China)

Keywords:: road engineering; continuous rain; collapse; risk evaluation; GIS

Abstract:: Aiming at the regional risk evaluation of highway collapse induced by continuous rain, regional risk evaluation models were established based on the superposition theory of regional impact factors. From four main factors such as inducing conditions, topography, geology and other factors, annual average times of continuous rain, terrain slope, density of surface cutting, soil types and vegetation coverage were selected as evaluation indicators. Regional risk evaluation of highway collapse induced by continuous rain in Shaanxi Province was finished by GIS, and the risks were divided into five grades according to disaster characteristics in Shaanxi Province. Finally, regional risk distribution of trunk-highway collapse induced by continuous rain in Shaanxi Province was revealed based on the evaluation. The results show that risk grade of portions of G210, G108, G316, S310, S207, S308, S309 and S210 are extremely severe, which should attract the attention of the related departments.