Study on Numerical Simulation of Arch Mechanism of Bridge Pile Foundation

Qu, Zhanhui; Han, Zemin; Tang, Haoyu; Xu, Jiangbo; Wang, Heping; Liu, Yifan

doi:10.3390/buildings14010146

Cited by 2 publications

(1 citation statement)

References 12 publications

(11 reference statements)

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“…In addition, the large-scale lifting of groundwater reduces the effective stress of the overlying soil under the pile foundation, and the buoyancy generated by groundwater causes the overlying soil to lose its load as a whole, eventually leading to the overall upward floating of the pier [21]. Qu et al [22] analyzed the influencing factors of bridge pile foundation arch by using Plaxis 3D finite element software simulation, and concluded that ground stress is the main reason for bridge pile foundation arch. Zheng et al [23] proposed a novel complex true triaxial static-dynamic combined loading method reflecting underground excavation damage and frequent intermittent disturbance failure and also proposed a new three-stage true triaxial coupled static and dynamic load test method to simulate the stress path of rock in the process of disturbance and failure after deep engineering excavation.…”

Section: Introductionmentioning

confidence: 99%

Study on Arching Mechanism of Bridge Pile Foundation: Taking the Shiyangtai No.1 Bridge as an Example

Wang,

Sun,

et al. 2024

Buildings

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The structure of a bridge has certain peculiarities, and its pile foundations are susceptible to uplift or settlement deformation due to various factors. This can result in bridge deck cracking, structural instability, tilting, and even irreversible damage, which significantly impacts the bridge’s stability and driving safety. This study focuses on the Shiyangtai No.1 Bridge and aims to investigate the factors that cause abnormal rise and fall deformations of bridge pile foundations. The study combines macro and micro analysis, physical characteristic testing of the overlying soil under the bridge pile foundation, and numerical simulation of the bridge pile foundation in the goaf. The study discusses in-depth the formation mechanism of the abnormal uplift of some pile foundations of the Shiyangtai No.1 Bridge based on the analysis of the factors influencing the abnormal rise and fall deformation of the bridge pile foundations at home and abroad. The expansive soil beneath the pile foundation is weak, and the force generated by the water expansion is insufficient to cause the pile foundation to rise to 309 mm. The results indicate that the pile foundation of the bridge is not affected by the expansion characteristics of the overlying soil. The collapse of the goaf roof generates double lateral thrust from the accumulation body at the bottom of the goaf and the upper collapse arch. This causes staggered bending uplift of the sandstone soil layer, resulting in upward squeezing pressure that causes the bridge pile foundation to rise. Therefore, the coal mining area is the main factor influencing the abnormal uplift of the pile foundation of the Shiyangtai No.1 Bridge.

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Section: Introductionmentioning

confidence: 99%

Study on Arching Mechanism of Bridge Pile Foundation: Taking the Shiyangtai No.1 Bridge as an Example

Wang,

Sun,

et al. 2024

Buildings

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Research on disturbance influence of goaf residual deformation on simply supported beam bridge

Guo,

Yang,

Chen

et al. 2024

Sci Rep

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In order to analyze the stability of the bridge above the goaf, the disturbance influence of goaf residual deformation on the bridge is studied. Firstly, an equivalent numerical simulation method of goaf residual deformation evolution process is studied by quantitative analysis the sensitivity of residual subsidence to the rock parameters using the OAT (one-variable-at-a-time). Then, the collaborative deformation of ground, pile, and bridge floor is studied under the condition of a simply-supported beam bridge above the goaf center. Finally, the mechanism of collaborative deformation of ground, pile, and bridge floor is revealed. The results show that the goaf residual deformation process can be obtained by weakening the elastic modulus of fractured rock in the caving zone. At the final residual deformation stage, the subsidence ratio of ground to pile is about 10, and the subsidence ratio of pile to bridge floor is about 2, while the ground horizontal movement ratio of ground to pile is about 7, and the bridge floor horizontal movement can be ignored. The bridge floor is always in the positive curvature influence zone, and the pile has an inhibitory effect on the curvature deformation of the bridge floor. The compression deformation occurs between the piles locations, while the tensile deformation occurs at the pile location. The evolution of negative frictional resistance derived from goaf residual deformation is the main reason for the change in the collaborative deformation law among the ground, pile and bridge floor. This research can provide scientific support and theoretical basis for the design, construction, and protection of the bridge above the goaf center, and can also provide reference for the stability evaluation of bridge above goaf under other conditions.

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Study on Numerical Simulation of Arch Mechanism of Bridge Pile Foundation

Cited by 2 publications

References 12 publications

Study on Arching Mechanism of Bridge Pile Foundation: Taking the Shiyangtai No.1 Bridge as an Example

Study on Arching Mechanism of Bridge Pile Foundation: Taking the Shiyangtai No.1 Bridge as an Example

Research on disturbance influence of goaf residual deformation on simply supported beam bridge

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