MECHANICAL DEFORMATION CHARACTERISTICS OF CORRUGATED STEEL ARCH CULVERT UNDER STATIC LOAD

Through filling and static load tests, four steel corrugated arch culvert sections are selected, including trough section in the middle of the culvert axis, peak section in the middle of the culvert axis, trough section at the culvert opening, and wave crest section at the culvert opening, and set up strain gauges, earth pressure boxes and deformation measuring instruments, the mechanical characteristics of corrugated steel arch culverts such as stress, strain and displacement are studied, and the mechanical deformation characteristics and deformation laws of corrugated steel arch culverts under static load are obtained. The research results show that:1) Under the load of the same fill height, the vertical stress of the corrugated steel arch culvert is smaller than the vertical stress of the soil without culvert. The earth pressure is greater than the stress in the soil at the same height; 2) Due to the difference in the direction of the surrounding earth pressure on the culvert in the various stages of filling construction, the phenomenon of tension and compression changes at multiple locations during the filling process of the culvert, culvert culvert, culvert waist. The strain at the location is often larger, so this point is a weak point relative to other measuring points.