Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Lan, Bin; Wang, Yanping; Wang, Weiguo

doi:10.3390/app13137715

Cited by 4 publications

(3 citation statements)

References 73 publications

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“…These include soldier pile walls, sheet pile walls, diaphragm walls, soil nail walls, drilled pier walls, contiguous pile walls, secant pile walls, double-row retaining walls, and more [8]. In order to optimize the design of the structure, investigations have also been conducted on fundamental structural dimensions, including pile diameter, pile length, pile spacing, row spacing, inclination angle, and other parameters [9]. The values of optimal design parameters vary depending on the specific structural materials and geological conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Double-Row Retaining System with Different Piers

Sui,

Zhang,

et al. 2024

Buildings

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With the rapid expansion of foundation pit excavation areas due to the burgeoning underground transportation networks in large cities, spatial combined double-row retaining structures have become indispensable for ensuring stability and minimizing deformation. Integrating piers into these structures enhances stiffness; however, the research on this topic is limited. This study investigates the Chisha Metro project, which utilizes a double-row support structure with added support piers to improve overall stiffness. Numerical simulations are employed to model the foundation pit and analyze the stress distribution and deformation of double-row retaining systems with T-shaped, cross-shaped, or square-shaped piers. The results demonstrate that the retaining system, after the introduction of piers, exhibits reduced maximum horizontal displacement and surface settlement of soil, and indicates spatial characteristics and the transformation from a planar problem to a spatial problem. Furthermore, in specific geological conditions, the T-shaped support pier proves to be more effective in connecting the front and rear support structures compared to the cross-shaped and square-shaped support piers, which mainly reinforce the soil without connecting the support structures. This research provides valuable insights for improving design and construction practices in foundation pit engineering.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Double-Row Retaining System with Different Piers

Sui,

Zhang,

et al. 2024

Buildings

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“…Hence, it is widely used in foundation pit projects [1][2][3]. Recently, with the continuous development of computer technology, numerical simulation methods have become an important tool to deal with the problem of foundation pits, and they are widely used in foundation pit design and engineering [4][5][6][7][8][9]. Compared with the traditional empirical formula method [10] and physical model method [11], the numerical simulation method can not only establish a complex three-dimensional model and invert the real pit to a certain degree but also carry out the design optimization work, which saves a large amount of money and time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect and Mechanism of Supporting Pile Equivalent Calculation Methods in Pile–Anchor Support System

Liu,

Wang,

Liu

et al. 2023

Applied Sciences

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In numerical analysis, the pile equivalent calculation method plays a key role in foundation pit calculation results. However, the effect and mechanism of different pile equivalent calculation methods in the foundation pit has remained unclear. To solve this question, based on FLAC3D, four pile equivalent calculation methods were introduced into a typical pile–anchor pit. This research was carried out from the perspective of soil displacement and stress, special points’ stress paths, and the plastic zone. The results revealed that there was a remarkable influence on the calculation results for different pile equivalent calculation methods. Specifically, compared with structural pile elements, displacements near the pile were smaller in solid pile element mode. Moreover, with the increase in excavation depth, stress concentration appeared in the solid pile element mode. The solid support pile with the interface, compared to that without the interface, had less displacement but more stress concentration around the pile, which led the special points’ stress paths around the solid pile to become irregular. Regarding the structural pile elements, it is suggested that both modeling approaches had a similar effect. These findings could help to provide a deeper insight into pile–anchor foundation pit numerical analysis.

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“…A calculation model for the support stiffness of this structure was established, and numerical simulations were conducted to investigate the influence of largespan support spacing on the deformation and internal forces of the supporting structure. Lan et al 9 investigated the effects of dimensional parameters such as pile diameter and length, as well as engineering parameters such as pile spacing and row spacing, on the stress and deformation of double-row pile support structures. They also studied the influence of soil arching effect on the stress and deformation of these structures based on a calculation model considering pile-soil interaction.…”

mentioning

confidence: 99%

Sensitivity analysis of counterweight double-row pile deformation to weak stratum parameters

Wang,

Niu,

et al. 2023

Sci Rep

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In order to investigate the sensitivity of weak soil parameters on the deformation of balanced double-row piles, a case study was conducted in a deep foundation pit project in Shenzhen City. A variety of analysis methods, including numerical simulation, field measurements, orthogonal experiments, and theoretical analysis, were employed to analyze the impact of three weak soil parameters on the deformation of balanced double-row piles. The research results showed that the deformation of the front and back rows of piles exhibited overturning deformation, gradually decreasing with depth and reaching the maximum at the pile top due to the constraint effect of the balance platform. The numerical simulation results of horizontal displacements for the front and rear piles were in good agreement with the field measurements, confirming the accuracy and reasonableness of the numerical analysis model and parameter selection. Through a series of orthogonal numerical simulation experiments, it was determined that the cohesive strength (C) of soft layers, such as rockfill and silt, is a key factor, the internal friction angle (φ) is an important influencing factor, and the elastic modulus (E) is a general influencing factor. Theoretical analysis was employed to establish the relationship curve between each parameter and the maximum pile deformation, as well as the sensitivity factors, further verifying the impact of these weak soil parameters. The research findings presented in this paper can provide valuable guidance for geotechnical engineers when selecting geological parameters for similar deep excavation projects.

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Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Cited by 4 publications

References 73 publications

Numerical Simulation of Double-Row Retaining System with Different Piers

Numerical Simulation of Double-Row Retaining System with Different Piers

Numerical Study on the Effect and Mechanism of Supporting Pile Equivalent Calculation Methods in Pile–Anchor Support System

Sensitivity analysis of counterweight double-row pile deformation to weak stratum parameters

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