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Abstract

To investigate the influence of culvert-side fill height on the subsoil bearing capacity of culverts with separate footings and to establish a method for calculating this bearing capacity, an analytical solution for the ultimate subsoil bearing capacity considering the effect of culvert-side fill was derived using the assumed slip surface method. Meanwhile, finite element software was used to investigate the settlement and deformation characteristics of culverts with separate footings for different foundation soil types and culvert-side fill heights. The results indicate that considering the effect of culvert-side fill increases the subsoil bearing capacity of culverts with separate footings, and that the ultimate subsoil bearing capacity shows a positive linear correlation with culvert-side fill height. With a post-construction settlement not exceeding 20 cm as the control criterion, it is feasible to apply a correction for culvert-side fill height to the characteristic value of subsoil bearing capacity for culverts with separate footings using the formula specified in Clause 4.3.4 of the Specifications for Design of Foundation of Highway Bridges and Culverts (JTG 3363—2019 ).

Publication Date

10-29-2026

DOI

10.14048/j.issn.1671-2579.2026.05.019

First Page

182

Last Page

189

Submission Date

October 2026

Reference

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