Abstract
Buried corrugated steel culverts are universally regarded as a structure with strong deformation adaptability and dispersed the upper load by corrugated steel structures surrounding soil constraints to enhance the carrying capacity and the use of soil-structure interaction. A lot of factors influence the earth pressure of the buried corrugated steel culvert, such as culvert stiffness, physical characteristics of the backfill (bulk density, deformation modulus and internal friction angle), geometry of structure and backfilling height. The finite element program of ANSYS has been used to research the elastic modulus, Poisson’s ratio, internal friction angle of soil, inertia moment of corrugated steel plate and pipe diameter affect the rigidity and flexibility of buried corrugated steel culvert. By defining path lines in the finite element post-processing, extracting and comparing the horizontal and vertical directions soil displacements along the lines, and doing impact pa-rameter analysis. Classification for flexible and rigid pipes of the buried corrugated steel pipe culvert structure has been made according to the analysis results. A theoretical reference has been provided for the design and construction of the buried corrugated steel pipe culverts.
Highlights
Buried corrugated steel pipe culvert is a typical soilstructure interaction structure, backfill is both load and load receptor, structure and surrounding soil are working together to cause the earth pressure re-distribution
Likewise, when the relative settlement of the soil prism directly above the structure is greater than that of the adjacent soil prisms, the layers of soil in the central prism are subjected to a reverse arch shape deformation and the earth load on the pipe is reduced by the upward shearing forces exerted on the central soil prism, the pipe which is referred to as flexibility pipe
From the finite element analysis we can see that the elastic modulus, Poisson’s ratio of the backfill soil, inertia moment of corrugated steel plate and pipe diameter have a large effect on the displacements of the structure, that is to say that they have a large effect on the rigidity and flexibility of buried corrugated steel culvert
Summary
Buried corrugated steel pipe culvert is a typical soilstructure interaction structure, backfill is both load and load receptor, structure and surrounding soil are working together to cause the earth pressure re-distribution. The soil displacements along with two vertical path lines with the six different cross-sections of corrugated steel plate are shown in Fig.
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