Mechanical deformation characteristics of corrugated steel pipe culvert under static load

Compared with the traditional reinforced concrete and masonry culvert engineering, the corrugated steel pipe culvert structure has excellent construction and use performance. There are many mechanical calculation methods for corrugated steel pipe culverts, but there are certain limitations due to different degrees of simplification of the calculation model. Aiming at the stress and deformation characteristics of flexible high-filled corrugated steel pipe culverts under the action of soil filling, this paper selects the trough section in the middle of the culvert axis, the trough section in the middle of the culvert axis, the trough section at the entrance of the culvert, and the culvert through filling and static load tests. The four corrugated steel corrugated pipe culvert sections at the wave crest section of the cave entrance are equipped with strain gauges, earth pressure cells and deformation measuring instruments to study the stress, strain, and displacement mechanical characteristics of the corrugated steel pipe culvert, and obtain the mechanical deformation characteristics of the corrugated steel pipe culvert under static load. The law of deformation. The research results show that: 1) Under the load of the same fill height, the vertical stress of the corrugated steel pipe culvert is smaller than the vertical stress of the soil without a culvert. The pressure is greater than the stress in the soil at the same height; 2) Due to the different directions of the surrounding earth pressure on the pipe culvert during the filling process, tension and compression changes occur at multiple locations, and the strain at the top and waist of the pipe culvert is often larger, so this point is a weak point relative to other measuring points.