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Abstract

Relying on the experimental project, the force characteristics during the construction process of steel bellow culverts with high-fill subgrade and large aperture in collapsible loess region were tested, and the variation laws of the inner wall strain and the radial earth pressure on the outer wall of the pipe at different angles were obtained. The following conclusions were drawn through the research: Alternating tensile and compressive strain changes occur at the crest, trough, and wave side in the early stage of filling, and the stress at each angle is redistributed. The growth is rapid in the middle stage of filling and slows down in the later stage. The maximum strain values at the crest, trough, and wave side all occur at 45° of the upper or lower semi-circle, and the strain values at the same angle of the crest and trough are opposite, which is complementary. The variation law of axial strain is similar to that of tangential strain but slightly smaller overall, indicating that the steel bellow culverts are mainly subjected to tangential force and supplemented by axial force. The radial earth pressure on the outer wall of the pipe increases with the increase in the fill height, and it increases rapidly in the early stage. In the later stage, the soil arching effect tends to level off.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.028

First Page

156

Last Page

159

Submission Date

May 2025

Reference

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