Finite element modelling of earth pressure on integral bridge piles
Finite element modelling of earth pressure on integral bridge piles
In Finland, integral bridges are often founded on piles, especially in presence of difficult soil conditions, which often consist of very soft and highly compressible soil. Structural design of piles for integral bridges is strongly affected by the earth pressure acting along the piles during the construction of the road embankment and superstructure and under the action of traffic loads. The mobilized earth pressure is commonly determined analytically based on a simplified solution according to a national design code. This solution models the earth pressure increment based on the earth pressure coefficient at rest of the embankment/superstructure material and assuming a given stress distribution with depth. Soil conditions and drainage during loading are expected to have an impact on the actual earth pressure. These aspects cannot be captured by the simplified analytical solution. Therefore, this study aims to compare the existing analytical approach to 3D finite element analyses. Finally, an improved analytical solution is proposed based on the finite element results.
Marco D'Ignazio; V. Lehtonen; P. Lauri Savolainen; P. Tolla; Veli-Matti Uotinen
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
9. Shallow and deep foundations
https://doi.org/10.53243/NUMGE2023-9
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