Study on the Reinforcement of Existing Slab Culverts by Corrugated Steel in Permafrost Regions

Abstract

Through the field detection and numerical simulation methods of existing culvert structures, the stress state of the corrugated steel structure strengthened with the slab culvert is studied, the reinforcement effect and stress state of the slab culvert structure in the unfavorable state, the corrosion of the corrugated steel and the change of the fill height are analyzed. Numerical simulation results show: Corrugated steel structure can significantly improve the internal force of the slab culvert structure and the degree of flexural deformation, and the reinforcement effect of the culvert structure under live load is more obvious. Corrugated steel structure can effectively reinforce the existing cover culvert structure when subjected to corrosion and the wall thickness becomes small, and its reinforcement performance decreases slowly with the decrease of wall thickness. When the original cover culvert structure loses its bearing capacity, the corrugated steel structure can still effectively exert the function of the original cover culvert structure. When the top fill height of the slab-culvert is between 1 m and 4 m, the reinforcement effect of the corrugated steel structure is relatively stable.