Stability analysis and safety factor prediction of excavation supported by inclined piles in clay

Diao, Yu; Zhu, Pengyu; Jia, Zhenyang; Zheng, Gang; Du, Yunfei; Shang, Dongfan; Zhou, Haizuo

doi:10.1016/j.compgeo.2021.104420

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…Case 1: To verify the applicability of the calculated pile spacing method for the supporting piles with the same diameter, a slope protection case utilizing cantilever piles on a highway slope in northern Sichuan was selected as the validation target [9]. It is known that the average unit weight of the soil behind the piles in this region is 20 kN/m Zhang et al [27] 8.65 Xiao et al [31] 7.57…”

Section: Validation and Application Of The Proposed Pile Spacing Comp...mentioning

confidence: 99%

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

Zhang,

Zhao,

Yang

et al. 2024

Preprint

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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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Section: Validation and Application Of The Proposed Pile Spacing Comp...mentioning

confidence: 99%

“…In the design of support structures, excessive pile spacing can weaken the support effect, while too small spacing may lead to unnecessary over-support, thereby escalating the project cost. Therefore, determining a reasonable pile spacing is a crucial consideration in the design of excavation support [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%