A closed-form solution for column-supported embankments with geosynthetic reinforcement

Zhao, Lin‐Shuang; Zhou, Wan-Huan; Geng, Xueyu; Fatahi, Behzad

doi:10.1016/j.geotexmem.2019.01.006

Cited by 43 publications

(12 citation statements)

References 129 publications

(136 reference statements)

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“…It is usually related to soil arching phenomenon, which was first studied by a famous trap door experiment conducted by Terzaghi (1943). Subsequently, plenty of experimental and numerical studies were carried out to deeply understand the soil arching and the load transfer mechanism in pile-or columnsupported embankments without and with geosynthetic reinforcements (Low et al, 1994;Deb and Basudbar, 2007;Chen et al, 2008;van Eekelen et al, 2012avan Eekelen et al, , 2012bvan Eekelen et al, , 2013Wu et al, 2019;Zhao et al, 2019). Many design methods, e.g.…”

Section: Design Methodsmentioning

confidence: 99%

Numerical study of creep effects on settlements and load transfer mechanisms of soft soil improved by deep cement mixed soil columns under embankment load

Feng

Yin

2020

Geotextiles and Geomembranes

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Section: Design Methodsmentioning

confidence: 99%

Numerical study of creep effects on settlements and load transfer mechanisms of soft soil improved by deep cement mixed soil columns under embankment load

Feng

Yin

2020

Geotextiles and Geomembranes

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“…The lateral stiffness of stabilizing pile embedment in landslides is significantly larger than that of the surrounding soil, and a rigid support boundary of the sliding soil is formed. Owing to the squeezing effect of the sliding soil, the relative rigidity difference between the pile and soil [4], as well as the relative deformation between the inter-pile soil and post-pile soil, forms the objective condition for the soil arching effect. The soil arching effect is a mechanical phenomenon in which the soil mass makes full use of its strength to adjust the internal stress distribution [5].…”

Section: State Of the Artmentioning

confidence: 99%

A New Method to Determine a Reasonable Pile Spacing of Stabilizing Piles and Earth Pressure on Sheet Piles

Zhang¹,

Chen²,

Ma³

et al. 2019

JESTR

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The soil arching effect is an important premise for non-continuity structures (e.g., stabilizing piles) to produce continuous retaining and masking effects; pile spacing is closely related to this concept. A scientific and reasonable method to determine the pile spacing and earth pressure on sheet piles is necessary to design safe and economically feasible stabilizing piles. At present, theoretical analyses of reasonable pile spacing rarely consider the influence of lateral earth pressure. This study proposes a new method to determine a reasonable pile spacing and earth pressure on sheet piles conforming to engineering practices. The said method considers the influence of lateral earth pressure. First, a mechanical analysis model of soil arching was established. In this model, the most unfavorable sections at the arch foot and arch top were used as a control condition, and the problem of soil arching of stabilizing piles was summarized as a zero-value problem to solve the nonlinear equations. Extrema were searched using MATLAB, through which a reasonable pile spacing and soil arching equation were determined. Second, the earth pressure on the sheet pile was calculated from the soil arching equation. Finally, the proposed method was proven reasonable by combining engineering cases. The results show that the pile spacing significantly varies under different failure control conditions of the soil arching effect. In the proposed method, the calculated pile spacing is 8 m, which is between those obtained from two existing methods. This pile spacing is relatively reasonable. The earth pressure on the sheet pile is calculated by the integral method through a reasonable arch axis. The calculated soil range in the proposed method is closer to practice compared with those calculated via classical earth pressure theory and the original simplified granary method. Moreover, the earth pressure of the proposed method is appropriate. The proposed method is applicable to the design of sheet piles. Considering appropriate safety reserves, the proposed method can not only calculate the minimum pile spacing but also judge the reasonability of the designed pile spacing.

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“…Various studies have been conducted to evaluate the behavior of stone columns (Poorooshasb and Meyerhof, 1997; Balaam and Booker, 1981; Shahu and Reddy, 2011; Debnath and Dey, 2017; Ehsaniyamchi and Ghazavi, 2019; Zhao et al , 2019). Few researchers evaluated the behavior of stone columns on a real site.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of the settlement behavior of soil reinforced by stone columns

Hadri

Bekkouche

Messast

2023

WJE

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Purpose The paper aims to present an experimental and numerical investigation of the load–settlement behavior of soil reinforced by stone column, as well as to evaluate the plane strain unit cell model for the analysis of stone columns. Design/methodology/approach The numerical analysis was done using both axisymmetric and plane strain models. The elastic perfectly plastic behavior of Mohr–Coulomb was adopted for both soil and column material. The numerical results of this study were validated by the comparison with the in-situ measurements of a full-scale loading test on a stone column. This study also evaluated the effect of different parameters involved in the design of a stone column, including Young’s modulus of the column material, column diameter, spacing between the stone columns and Poisson’s ratio of the column material. Findings After the numerical simulation, the results from both axisymmetric and plane strain models are quite comparable. In addition, the numerical results revealed that the stone column with low spacing, a large diameter and a high Young’s modulus indicated better behavior against the settlement. Originality/value The axisymmetric unit cell model was used in many numerical studies on the behavior of stone columns. In the present work, a field load test on stone column was simulated using a plane strain unit cell model. This research adds that the plane strain unit cell model can be used to predict the settlement of reinforced soil with stone columns.

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A closed-form solution for column-supported embankments with geosynthetic reinforcement

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 43 publications

References 129 publications

Numerical study of creep effects on settlements and load transfer mechanisms of soft soil improved by deep cement mixed soil columns under embankment load

Numerical study of creep effects on settlements and load transfer mechanisms of soft soil improved by deep cement mixed soil columns under embankment load

A New Method to Determine a Reasonable Pile Spacing of Stabilizing Piles and Earth Pressure on Sheet Piles

Experimental and numerical study of the settlement behavior of soil reinforced by stone columns

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