Model Test and PFC
            <sup>2D</sup>
            Numerical Analysis on Soil Arching Effects Surrounding Passive Laterally Loaded Piles

Jian, Jiang; Qi, B. X.; Zhou, Jian; Zeng, Qiang

doi:10.1061/41101(374)36

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…In engineering practice, the pile-soil relationship is often complex. Many studies and experiments [ 20 , 21 ] have revealed that when pile spacing is small enough, a soil arching effect will occur between soil and piles, making it possible for piles to do more negative work on the soil.…”

Section: Calculation Of the Safety Coefficientmentioning

confidence: 99%

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

2023

PLoS ONE

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The upper bound limit analysis method is one of the main approaches to check the basal stability of foundation pits against upheaval. However, existing studies have often failed to consider the effects of external supporting structures, including isolation piles and others, on basal stability against upheaval. This study derives a formula for the coefficient of basal stability against upheaval under the action of isolation piles by simplifying the pile-soil relationship and systematically examines the impact of isolation pile parameters on basal stability against upheaval using the theory of continuous velocity fields and the upper bound limit analysis method. A comparison of simulation results indicates that this technique can accurately identify the variation trend of basal stability against upheaval under the influence of isolation piles and achieve high calculation precision under the operating conditions of wide foundation pits and short isolation piles. Accordingly, a moderate increase in isolation pile parameters produces a significant supporting effect for narrowed foundation pits. Whereas for wide foundation pits, the supporting capacity of isolation piles can be maximized when pile length equals excavation depth.

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Section: Calculation Of the Safety Coefficientmentioning

confidence: 99%

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

2023

PLoS ONE

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“…As a result of this soil-arching phenomena, the classical solutions are not always conservative. Jiang et al [13] later related the cause of the soil-arching phenomena to the non-homogeneous displacement in soil that causes stress release and particle rearrangement.…”

Section: Introductionmentioning

confidence: 99%

Performance of Pile–Wall System Adjacent to Footings

Sudani,

Jao

2024

Applied Sciences

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The performance of a retaining wall is dependent on multiple factors including lateral earth pressure, which results from backfill soils and adjacent footings located behind a retaining wall. The prediction of a retaining wall’s performance in a footing–soil–wall system (FSPS) must incorporate the influences caused by the movement of a retaining wall. This study examines the performance of a retaining wall formed by driven, precast, concrete piles located adjacent to a concrete footing using two- and three-dimensional finite element analysis (2D and 3D FEA) by ANSYS 13.0 software. Both soil and concrete are assumed to behave as non-linear, elastic-perfectly plastic and rate-independent materials in compliance with the upper-bound model of Drucker–Prager yield criterion. Three backfill and foundation soils are considered: kaolin, silty clay, and kaolin–sand. Various conditions of soil type, footing shape ratio, pile width, and footing–pile distance through 180 FEA runs are investigated. The effects of 2D and 3D FEA on the behavior of the pile–wall system are compared. The lateral deflection and pressure distribution profiles along the pile–wall are studied and presented. Two empirical equations predicting lateral deflections at the pile toe and pile head and useful for pile structural design are developed under the ultimate pressure of the adjacent footing.

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“…The soil arching effect is widely used to characterize the interaction between stabilizing piles and surrounding soils with the development [13]. Stress distribution analysis has been a universal method to explain the mechanism of soil arch: experimental studies have shown that the stress in the soil arch changed exponentially [14,15], and the stress tended to decrease along the direction of the landslide thrust [16]. An alternative approach to characterize soil arch is to examine the force equilibrium between stabilizing piles and surrounding soils [17,18], and physical models are available for both the soil arches between and behind the stabilizing piles [4] (Fig.…”

Section: Introductionmentioning

confidence: 99%

A New Stress-reduction Model for Soil Arch in Landslides

Li¹,

Sun³

et al. 2023

Period. Polytech. Civil Eng.

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Stabilizing piles are extensively used as an effective landslide control treatment, and the soil arching effect is the key element for the performance of the pile system. Most previous studies on soil arching effect and its application in stabilizing piles were conducted with laboratory tests and numerical simulations, while limited efforts have been dedicated to the analytical characterization of such a soil-structure interaction. In this paper, a new stress-reduction model for soil arch in landslides is established by theoretical derivation. Our model calculation has demonstrated an exponential reduction in the stress along the direction of slipping between and behind stabilizing piles and thus justifies the observations of laboratory tests and numerical simulations. Thereafter, the analytical solutions to the two key arch shape parameters, namely the inclination angle at the foothold and the thickness of soil arch, are derived based on the proposed stress-reduction model. Then, the ultimate bearing capacity of soil arch between and behind stabilizing piles is subsequently calculated, and a three-level load sharing model for landslides is thus proposed based on the stress-reduction mode. The load sharing model can well capture the stage characteristics of the interaction between landslide mass and stabilizing piles. Finally, the calculation model of spacing between stabilizing piles is established based on the proposed stress-reduction model, and it turns to be good in field application. The findings of this study can contribute to a better understanding of the soil arching effect as well as a better design of the stabilizing piles.

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Model Test and PFC ^2D Numerical Analysis on Soil Arching Effects Surrounding Passive Laterally Loaded Piles

Cited by 4 publications

References 4 publications

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

Performance of Pile–Wall System Adjacent to Footings

A New Stress-reduction Model for Soil Arch in Landslides

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Model Test and PFC 2D Numerical Analysis on Soil Arching Effects Surrounding Passive Laterally Loaded Piles

Cited by 4 publications

References 4 publications

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

Analysis of the effects of isolation piles on the basal stability of foundation pits against upheaval based on continuous velocity fields

Performance of Pile–Wall System Adjacent to Footings

A New Stress-reduction Model for Soil Arch in Landslides

Contact Info

Product

Resources

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Model Test and PFC ^2D Numerical Analysis on Soil Arching Effects Surrounding Passive Laterally Loaded Piles