Numerical Analysis of Laterally Loaded Single-Pile Behavior Affected by Urban Metro Tunnel

Vali, Ramin; Saberian, Mohammad; Beygi, Majid; Porhoseini, Reza; Abbaspour, Mohsen

doi:10.1007/s40098-019-00375-5

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…2. Normal constraints are set around the model, and fixed constraints are set at the bottom of the model, and the top surface sets to be free (Vali et al 2020;Fang et al 2022). Only the self-weight stress is considered for the initial geo-stress balance.…”

Section: Calculation Modelmentioning

confidence: 99%

Evaluation of the dynamic additional impact about foundation pit construction on the existing adjacent subway station with the PBA method

Wang,

Dai,

Chen

et al. 2023

Electron. J. Struct. Eng.

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In this paper, relying on the Tianhe East Station project of Guangzhou Subway Line 11, the deformation and mechanical evolution rules about the existing adjacent stations with the pile-beam-arch (PBA) method in the all excavation stages about the new foundation pit is evaluated through numerical calculation method. It was revealed that that the largest displacement about the existing station’s side wall and the middle column reaches 2.1mm and 1.5mm respectively during the excavation about the foundation pit. Due to the impact about construction of the foundation pit, the uplifting phenomenon occurs on the side of the foundation pit, and the maximum uplifting value reaches 0.4mm. When the construction about foundation pit is finished, the whole station floor shows a deformation form of “left lower torsion”, and the largest compressive stresses as well as tensile stresses about the side wall and the bottom plate do not reach the standard limiting value, and the whole is being a relative safe status. With the increase about the excavation depths, the axial forces about the middle column gradually increase to 7016kN, and the incremental axial forces about the middle column after the construction is completed accounts for about 11.7% of the axial force of initial construction. Therefore, the disturbance effect about foundation pit construction on the adjacent station with the PBA method can not be ignored. The research result in this paper may offer some important references for the construction and design of similar cases.

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Section: Calculation Modelmentioning

confidence: 99%

Evaluation of the dynamic additional impact about foundation pit construction on the existing adjacent subway station with the PBA method

Wang,

Dai,

Chen

et al. 2023

Electron. J. Struct. Eng.

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“…For further details regarding the theoretical background and the numerical implementation of this method, readers are referred to [49][50][51] for the lower bound finite element limit theory, and to [49,[51][52][53] for the upper bound one. Notably, a striking advantage of the FELA approach is that preliminary assumptions related to the failure surface are not needed [54].…”

Section: Size Of Void √ √ √mentioning

confidence: 99%

Machine Learning-Based Prediction of the Seismic Bearing Capacity of a Shallow Strip Footing over a Void in Heterogeneous Soils

et al. 2021

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The seismic bearing capacity of a shallow strip footing above a void displays a complex dependence on several characteristics, linked to geometric problems and to the soil properties. Hence, setting analytical models to estimate such bearing capacity is extremely challenging. In this work, machine learning (ML) techniques have been employed to predict the seismic bearing capacity of a shallow strip footing located over a single unsupported rectangular void in heterogeneous soil. A dataset consisting of 38,000 finite element limit analysis simulations has been created, and the mean value between the upper and lower bounds of the bearing capacity has been computed at the varying undrained shear strength and internal friction angle of the soil, horizontal earthquake accelerations, and position, shape, and size of the void. Three machine learning techniques have been adopted to learn the link between the aforementioned parameters and the bearing capacity: multilayer perceptron neural networks; a group method of data handling; and a combined adaptive-network-based fuzzy inference system and particle swarm optimization. The performances of these ML techniques have been compared with each other, in terms of the following statistical performance indices: coefficient of determination (); root mean square error (); mean absolute percentage error; scatter index; and standard bias. Results have shown that all the ML techniques perform well, though the multilayer perceptron has a slightly superior accuracy featuring noteworthy results (0.9955 and 0.0158).

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“…The results indicated that these two factors have a significant influence on the lateral response of single piles. In addition, recent studies experimentally investigate other influential factors, such as the embedment depth of piles, the adhesion at the pile-soil interface, the pile length, and the distance (d pc ) from the pile to the crest of the slope (Georgiadis et al, 2013;Deendayal et al, 2016;Vali et al, 2019). To supplement model tests, numerical analyses are conducted on laterally loaded piles in sloping ground.…”

Section: Introductionmentioning

confidence: 99%

Bearing capacities of single piles under combined HM loading near slopes

Bian¹,

Peng²,

Zhang³

et al. 2023

Front. Mater.

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Piles are widely used to transfer the horizontal load of high-rise buildings, transmission towers, and bridges, especially for superstructures constructed near slopes. This study investigated bearing capacities of single piles under the combined horizontal force (H) and bending moment (M) for the pile in sloping ground. A 3D finite element model was proposed to simulate the non-linear pile–soil interaction and was verified by a model test. A series of numerical tests were conducted to obtain the failure envelope of bearing capacities of single piles under various combinations of H and M. The existence of slopes significantly reduced the bearing capacity of piles, especially when the horizontal and rotational displacements moved to the dip direction of the slope. An oblique ellipse was able to describe the failure envelope of bearing capacities of single piles near slopes in the HM plane. As the pile was installed away from the crest of the slope, both the width and height of the ellipse increased and the center of the ellipse was approaching the origin. The results of this article can provide useful references for designing horizontally loaded piles near slopes.

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Numerical Analysis of Laterally Loaded Single-Pile Behavior Affected by Urban Metro Tunnel

Cited by 9 publications

References 29 publications

Evaluation of the dynamic additional impact about foundation pit construction on the existing adjacent subway station with the PBA method

Evaluation of the dynamic additional impact about foundation pit construction on the existing adjacent subway station with the PBA method

Machine Learning-Based Prediction of the Seismic Bearing Capacity of a Shallow Strip Footing over a Void in Heterogeneous Soils

Bearing capacities of single piles under combined HM loading near slopes

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