Numerical analysis of dynamic behavior of piled embankment under train loading

Lang, Ruiqing; Ma, Changhu; Cheng, Xinglei; Sun, Liqiang; Zhang, Long; Zhang, Jianxin; Feng, Shi‐Jin; Li, Di

doi:10.1016/j.compgeo.2022.105243

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Piled embankments, as an economically effective ground improvement technique, are widely utilized in constructing highways and railways in areas with soft soils [1,2]. The piles in a piled embankment system typically penetrate through the soft soil stratum and are embedded in a stronger underlying bedrock for load-bearing purposes [3][4][5][6][7]. However, a floating piled embankment is a more cost-effective choice in regions with thicker soft soil.…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity of Foundation and Soil Arching in Rigid Floating Piled Embankments: Numerical Study

Zhuang,

Hu,

Fan

2023

Applied Sciences

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The definition of rigid floating piles in engineering applications remains ambiguous. This paper develops a numerical model of piled embankments and the modeling method is verified through engineering cases. Utilizing this model, the critical bearing capacity of the foundation for rigid floating piles is firstly determined to be approximately 150 kPa. Subsequent parametric studies show that soil arching in a rigid floating piled embankment begins to occur when the ratio of the embankment height to the clear pile spacing H/(s − a) ≥ 1.6. However, plastic failure does not occur in rigid floating piled embankments due to the weaker foundation, indicating that soil arching cannot fully develop. Finally, factors of the embankment fill properties are examined and it is shown that the large friction angle and high cohesion greatly enhance soil arching and reduce settlement in the embankment. The vertical stress above the subsoil decreased by 34.9% with an increase in the friction angle from 20° to 40°. Also shown is that the increase in the cohesion from 1 kPa to 7 kPa reduced the settlement on the top of and the base of embankment by approximately 72% and 58%, respectively. It has also been found that rigid floating piles rely on end resistance and skin friction to sustain the superimposed load.

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Section: Introductionmentioning

confidence: 99%

Bearing Capacity of Foundation and Soil Arching in Rigid Floating Piled Embankments: Numerical Study

Zhuang,

Hu,

Fan

2023

Applied Sciences

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Analysis of the Deformation and Dynamics of High-Speed Railway Bridge Under the Coupling Effect of Shield Tunneling and Train Load

Xiao,

Wang,

Huang

et al. 2023

Int. J. Str. Stab. Dyn.

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In order to study the dynamic response of high-speed railway bridge and its deformation law under the coupling effect of vibration load and shield tunneling, a coupling model of shield tunneling and train load is established based on the actual case of tunneling under an adjacent bridge. The deformation characteristics and dynamic response of the bridge are investigated by analyzing the deformation under different tunneling conditions and train running speeds. The results show that the maximum disturbance of the original stress field around the bridge is caused when the shield penetrates to the near side of the bridge structure, at which time, the damping effect of the ground and bridge system on the vibration load is weakened, thus intensifying the dynamic response of the bridge system, and the additional deformation caused by the vibration load is the largest; the presence of train loads during the shield excavation slightly attenuates the differential settlement of the bridge, but increases the cumulative settlement of the bridge, in addition, the additional deformation of the bridge will increase with the increase of the train running speed; the additional deformation caused by the train load within 2[Formula: see text]m of the shield crossing on both sides of the bridge is large, so the construction should be avoided as much as possible when the train is running in this construction section.

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Numerical analysis of dynamic behavior of piled embankment under train loading

Cited by 2 publications

References 18 publications

Bearing Capacity of Foundation and Soil Arching in Rigid Floating Piled Embankments: Numerical Study

Bearing Capacity of Foundation and Soil Arching in Rigid Floating Piled Embankments: Numerical Study

Analysis of the Deformation and Dynamics of High-Speed Railway Bridge Under the Coupling Effect of Shield Tunneling and Train Load

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