WIT Press

Assessment Model Of Debris Flow Hazard Along The Tianshan Highway


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Y. Huang, T. Liu, Z. S. Wang, S. Q. Yang & J. S. Liu


Debris Flow Hazard Assessment along the Tianshan Highway was carried out based on an established model. The assessment results indicated impacts of debris flow hazards to the highway and supplied a quantitative index with highway construction designs and protection in the debris flow affected area. The model formula can be shown as: S=K1K2; here S is highway debris flow hazard degree, K1 is debris flow hazard degree (0 ≤K1 ≤1), K2 is highway damage degree (0 ≤K2 ≤1). Index K1 as well as K2 are obtained with quantitative calculations respectively. This model has been verified based on research on highway debris flow in the Tianshan Mountain area of Xinjiang in China. Keywords: highway, debris flow, hazard degree, assessment model. 1 The idea of highway debris flow hazard degree assessment model The debris flow in the Chinese Xinjiang's Tianshan mountainous area is one kind of serious natural disaster, which can interrupt the transportation on road, destroy the highway facilities, even create serious traffic accidents frequently [1]. Current domestic and foreign debris flow risk factor assessment models only can appraise debris flow gully to the natural degree and are unable to evaluate the road safety rate. In order to appraise the debris flow effectively to the highway harm degree, meet quantitative factors [2] and instruct the highway design and maintenance, we set up the following highway debris flow hazard degree assessment model. S=K1K2 (1)


highway, debris flow, hazard degree, assessment model.