Effects of soil arching on behavior of composite pile supporting foundation pit

Zhang, Da‐Shuai; Zhang, Xingli; Tang, Haotian; Zhao, Zhiqiang; Guo, Jun; Zhao, Honghua

doi:10.1007/s40571-022-00518-1

Cited by 9 publications

(5 citation statements)

References 54 publications

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“…Similarity ratios for other physical factors were derived using similarity theory and dimensional analysis. The detailed derivation process is available in Wang (2017). The similarity relationships adopted in this study are listed in Table 1.…”

Section: Side Pile Model Test With the Pba Methods Determination Of T...mentioning

confidence: 99%

“…Recently, micro-steel pipe piles have gained popularity in various engineering fields owing to their advantages, such as high bearing capacity, flexible construction and strong environmental adaptability. They are gradually being applied in projects, such as foundation reinforcement (Zhu et al, 2013;Cheng et al, 2020;Guo et al, 2021;Wei and Ma, 2023), foundation pit support (Dong et al, 2018;Chen et al, 2022;Liang et al, 2022;Zhang et al, 2023) and slope prevention (Xiao, 2010;Xiang et al, 2015;Chen et al, 2017;Hazarika et al, 2017). In addition, micro-steel pipes are becoming a preferred choice for side piles in metro construction employing the PBA method.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Difference Analysis of Single-row and Double-row Side Piles in Stations by PBA Method Based on Model Test

Wang

2024

JJCE

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This study employs the pile-beam-arch (PBA) method to investigate the force-evolution law of micro-steel pipe piles during the excavation process, focusing on a Guangzhou metro-station project. Through laboratory model tests, we compared and analyzed the mechanical evolution laws of single-row and double-row side piles. Our findings revealed a significant soil arch effect in both single-row and double-row piles; with similar distribution patterns and peak-stress range. As soil excavation progresses, the soil arching effect shifts downward. Notably, the stress concentration in double-row piles is weaker than that in single-row piles, especially in the soil range of 0–50 mm after the piles. This is attributed to the looser soil between single-row piles, resulting in more evident stress release. The attenuation amplitude of the Y-direction stress of the double-row piles was considerably smaller than that of the single-row piles. The soil arching between the back-row piles in doublerow configurations exhibits shielding effects on the force of front-row piles, significantly weakening the soil pressure on them. This impact alters the force of the front-row piles, even causing the tip of the front-row piles to bend in reverse. The research results provide important insights for similar projects and can serve as a valuable reference.

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Section: Side Pile Model Test With the Pba Methods Determination Of T...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Difference Analysis of Single-row and Double-row Side Piles in Stations by PBA Method Based on Model Test

Wang

2024

JJCE

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“…1. To simplify the soil arch model, the following assumptions are made: (1) The shape of the soil arch formed by the composite pile, consisting of concrete cast-in-place piles and micro grouted steel pipe piles, can be approximated as a semi-elliptical curve [23]. (2) The sliding force of the soil behind the piles is treated as a uniformly distributed load.…”

Section: Determining the Rational Arch Axis Curvementioning

confidence: 99%

Optimal pile spacing considering soil arching effect for composite pile-supported foundation pit

Zhang,

Zhao,

Yang

et al. 2024

Preprint

Self Cite

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The study aims to investigate the optimal spacing of piles in composite pile-supported excavations. By considering the characteristics of the composite pile support structure and the distribution of soil sliding forces behind the piles, this study formulated a simplified soil arch model in the shape of a semi-elliptical line. Utilizing static equilibrium conditions and the limit equilibrium theory, the study successfully developed a computational model for the soil arch in composite pile-supported excavations and derived the corresponding formula for calculating pile spacing. The accuracy and reliability of this method were validated through practical engineering cases. A systematic analysis of key factors, including cohesion, internal friction angle, and soil pressure, was conducted to reveal their influence on pile spacing. The results indicate an increasing trend in pile spacing with higher cohesion, a nonlinear increase with an elevated internal friction angle, and a decrease in pile spacing with greater soil pressure. The proposed formula for pile spacing is applicable not only to composite pile-supported excavations but also for calculating pile spacing in scenarios with identical-sized pile support, highlighting its broad generality and applicability. The research offers a dependable theoretical foundation for the secure and economically efficient design of composite pile support structures in engineering practice.

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“…However, if the soil arch effect zones of the front pile and the back pile are compared and analyzed, the soil arch effect zone around the back pile is reduced, while the soil arch effect zone of the front pile is increased. At this time, the residual load of the front pile will increase, which is unfavorable to the horizontal bearing performance of the front pile [31][32][33]. Chen et al [95] and Wu et al [47] considered the double soil arching effect under the influence of the double-row pile support system, and the theoretical calculation value of the earth pressure is closer to the monitoring value of the earth pressure.…”

Section: Influence Of the Soil Arch Effect On Double-row Pile Support...mentioning

confidence: 99%

“…In recent years, research on double-row pile supporting structures has achieved significant results. For example: (1) The control effect of the pile diameter, the pile length, the crown beam, the connecting beam, and other basic structural dimensions, as well as pile spacing and row spacing, on the horizontal deformation and vertical settlement of the whole double-row pile structure system and the cost control of foundation pit engineering [26][27][28][29][30]; (2) The influence of the development of the soil arch effect on the deformation of the doublerow pile supporting structure during the excavation of the foundation pit [31][32][33]; (3) Based on the numerical simulation analysis, the deformation mechanism and deformation characteristics of the overall double-row pile structure, the front pile, the back pile, the crown beam, the connecting beam, etc. [34][35][36]; (4) Optimization and innovation of the pile-soil interaction calculation model [37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

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

Lan

Wang

2023

Applied Sciences

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The conventional support forms of foundation pit retaining piles include single-row piles, double-row piles, anchor-row piles, and so on. The double-row pile supporting structure is widely used in the deep foundation pit supporting the engineering of wharves, bridges, subways, tunnels, and high-rise and super-high-rise buildings. This study on double-row pile supporting structures mainly focuses on four aspects: (1) The influence of dimension parameters, such as pile diameter and pile length, and engineering parameters, such as pile spacing and row spacing, on the deformation control of a double-row pile structure and the stability control of foundation pits; (2) Influence of the soil arch effect on the stress and deformation of the double-row pile supporting structure; (3) Study on the deformation characteristics and rules of the components and the whole structure of the double-row pile supporting structure; (4) Study on the calculation model of pile-soil interactions. Based on the above four aspects, this paper summarizes the latest research status of the existing double-row pile supporting structure and its stress and deformation characteristics. The deformation characteristics and calculation model of the pile-soil interaction of double-row piles are reviewed and evaluated. Finally, the problems and deficiencies in the research on double-row pile support are summarized. These results provide a reference for future research on the double-row pile supporting structure of the foundation pit and the numerical analysis and calculation model and lay a solid foundation for further development of the theory.

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Effects of soil arching on behavior of composite pile supporting foundation pit

Cited by 9 publications

References 54 publications

Mechanical Difference Analysis of Single-row and Double-row Side Piles in Stations by PBA Method Based on Model Test

Mechanical Difference Analysis of Single-row and Double-row Side Piles in Stations by PBA Method Based on Model Test

Optimal pile spacing considering soil arching effect for composite pile-supported foundation pit

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

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