Lateral Deformation Characteristics and Control Methods of Foundation Pits Subjected to Asymmetric Loads

Wang, Kangyu; Li, Weijie; Sun, Honglei; Pan, Xiaodong; Diao, Hongguo; Hu, Bin

doi:10.3390/sym13030476

Cited by 9 publications

(5 citation statements)

References 25 publications

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“…Similarly, some foreign scholars have applied the finite element method to analyze lateral displacements of retaining structures, yielding satisfactory results [12][13][14][15]. Recently, Maleki et al also provided many important conclusions for reference in the field of numerical analysis modeling using the finite element method [16][17][18].…”

Section: Literature Review On Finite Element Methodsmentioning

confidence: 99%

Establishment of Localized Utilization Parameters for Numerical Simulation Analysis Applied to Deep Excavations

Wu,

Hsu

2023

Applied Sciences

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The aim of this study was to apply deep excavation behavior prediction models in the geotechnical field to establish localized soil parameters for gravel layers. Common software tools, including PLAXIS and SoilWorks, were used extensively. Monitoring data from deep excavation cases related to gravel layers in the Xindian area of Taiwan were collected. In the background analysis, the deformation of the retaining walls was used instead of parameters typically used in deep excavation analysis. This was performed to provide the ideal range recommendations for the input parameters when conducting a numerical simulation analysis of the Xindian District stratum or similar strata. The assessment results show that when setting the fifth layer of gravel to SPT-N = 100, PLAXIS suggested a soil elastic modulus range of 7840 N to 9800 N per square meter (kN/m2), while SoilWorks recommended a range of 2450 N to 3430 N per square meter (kN/m2). These ranges allow for a reasonable estimation of the maximum wall deformation during the final excavation stage. Based on the research findings, it is recommended that when conducting an excavation analysis in gravel layers in the Xindian area of Taiwan or in similar strata, engineers should refer to the abovementioned recommended ranges when selecting the soil elastic modulus for different software programs. This will enhance the accuracy of the deformation predictions during the final excavation stage.

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Section: Literature Review On Finite Element Methodsmentioning

confidence: 99%

Establishment of Localized Utilization Parameters for Numerical Simulation Analysis Applied to Deep Excavations

Wu,

Hsu

2023

Applied Sciences

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“…This approach enables precise calculation of excavation-induced internal forces and deformations of retaining piles during the excavation phase. Wang et al [9] used the PLAXIS 3D numerical simulation software to study the deformation characteristics of foundation pits under asymmetric loading. Li et al [10] conducted a study on the deformation characteristics of a shaped foundation pit support structure using the deep foundation pit of Malian North Station on Xiamen Metro Line 2.…”

Section: Introductionmentioning

confidence: 99%

Spatial Deformation Calculation and Parameter Analysis of Pile–Anchor Retaining Structure

Yin

2023

Applied Sciences

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Scholars often consider the deformation of a foundation pit retaining structure as a significant indicator of its stability. However, the current theoretical prediction formula for pit with pile–anchorretaining structure deformation is not yet perfect. This study utilizes a simplified spatial deformation model of a pile–anchorretaining structure and the principle of minimum potential energy to derive a prediction formula for the retaining structure’s spatial deformation. Afterwards, a numerical simulation model is developed based on actual engineering practices. On-site monitoring data is compared with the results of theoretical calculation formulas and numerical simulation models to validate their applicability. The research findings reveal minimal discrepancies between the theoretical calculation results, numerical simulation outcomes, and on-site monitoring data, indicating a high level of accuracy. Those three results follow consistent rules. The horizontal deformation curve of the crown beam exhibits a ‘V’-shaped distribution, and as the distance from the calculation point to the centerline of the foundation pit decreases, the horizontal deformation of the crown beam increases. The horizontal deformation curve of the pile displays a ‘V’-shaped distribution, and the pile’s horizontal deformation increases as the distance to the centerline of the foundation pit decreases. The research findings indicate that increasing the size and material strength of the crown beam and waist beam has only a limited effect on controlling the retaining structure’s deformation. However, by increasing the size and material strength of the pile, the deformation of the retaining structure can be significantly reduced.

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“…Designing MJS piles as end-bearing piles can significantly reduce the surface settlement and deformation of diaphragm walls. Wang et al [5] showed that soil reinforcement in the active compression zone of a foundation pit can be controlled by applying reinforcement at the location of maximum lateral deformation of the wall. They also suggested that the maximum lateral deformation of the wall can be limited by increasing the thickness of the diaphragm wall on the stressed side.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics and Control Methods of Deep Foundation Pit Excavation in Watery Sandy Soil Area

Liu,

Zhan,

Zheng

et al. 2023

Advances in Frontier Research on Engineering Structures

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This paper investigates the deformation characteristics and control methods of support structures during deep foundation pit excavation, using the foundation pit at the Diejiao Station of Foshan Metro Line 3 as a case study. A 3D nonlinear finite element software is employed for excavation simulation, adopting coupled pore fluid diffusion and stress analysis. The numerical model is verified by comparing the field monitoring data with the finite element results. The study systematically analyzes the influence of reinforcement position, reinforcement parameters, and reinforcement depth on the maximum lateral displacement of the diaphragm wall of the foundation pit. The research results reveal that reinforcing the soil on both sides of the diaphragm wall can effectively reduce the lateral deformation of the foundation pit. Furthermore, the study shows that external reinforcement of the diaphragm wall can reduce the maximum lateral displacement of the wall to a certain extent, but the reinforcement effect is limited. The reinforcement effect of the inner side of the diaphragm wall improves with the increase of the excavation depth. Properly increasing the Young’s modulus of the reinforcement can reduce the adverse effect of excavation on the foundation pit. Finally, the optimal depth of reinforcement is found to be the excavation depth of the foundation pit of 28.2 m. The research results can provide a reference for the foundation pit reinforcement scheme in watery sandy soil areas.

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Lateral Deformation Characteristics and Control Methods of Foundation Pits Subjected to Asymmetric Loads

Cited by 9 publications

References 25 publications

Establishment of Localized Utilization Parameters for Numerical Simulation Analysis Applied to Deep Excavations

Establishment of Localized Utilization Parameters for Numerical Simulation Analysis Applied to Deep Excavations

Spatial Deformation Calculation and Parameter Analysis of Pile–Anchor Retaining Structure

Deformation Characteristics and Control Methods of Deep Foundation Pit Excavation in Watery Sandy Soil Area

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