The G218 Narathi-Balentai highway is exposed to the impact risk of avalanche loading. This paper explores the constructional characteristics, column materials and structural design of the control fence of this section of highway, simulates avalanche based on RAMMS-AVALANCHE model, analyzes the force situation of the fence under the impact of avalanche with different parameters, and provides relevant countermeasures for the structural arrangement of the control fence. The avalanche dynamic process is simulated by the tanα parameter graphing method and the probabilistic relationship graph between avalanche throw and fall. The finite element analysis model of different types of fences is established to simulate the force state of fences when the height of avalanche impact is 1m, 2m and 3m. Under the consideration of different working conditions, the displacements and stresses of different types of fences were calculated, and the force characteristics of the fences were analyzed. By analyzing and demonstrating the force under avalanche load of three types of fences, the force characteristics of different forms of fences under avalanche load are obtained, and finally the diversion tip wedge structure is adopted to provide reference for similar disaster prevention projects.
