Improvement of shear strength and compressibility of soft clay stabilized with lime columns

Sakr, Mohamed; El-Sawwaf, Mostafa; Azzam, Waseim; El-Disouky, Esraa

doi:10.1007/s41062-021-00509-w

Cited by 9 publications

(1 citation statement)

References 7 publications

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“…Stone columns under superstructure compressive loads experience failure forms such as shear failure [1][2][3], bulging failure [4][5][6][7][8][9], and sliding failure [10], as illustrated in Figure 1. However, in soft soil, the common failure form of stone columns is bulging [7,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Composite Column Behavior: Loess Soil Reinforced by Concrete-Stone Column

Salam

Wang²,

Huang³

2022

Civ Eng J

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Stone columns are an effective approach to improving the bearing capacity of weak soils, which has led to increased interest in the improved soil method being further developed and expanded. In addition, enhancing the bearing capacity of stone columns has recently received great attention. This paper studies the effects of embedded concrete parts on the stone columns' bearing capacity and bulging failure. Moreover, arranging solutions to the problem of bulging failure and reduced bearing capacity of stone columns and understanding the stone columns' failure after reinforcement by comparing the results. Stone columns are either embedded in a solid concrete part or unreinforced were examined using large-scale laboratory experiments, and numerical simulation was performed using ABAQUS. The models test with a scale factor of 1:7 was employed. The results demonstrated that using a concrete part on the top of the stone column greatly increases its bearing capacity and the efficiency of the surrounding soil. Concrete-stone columns (CSCs) show stress concentration ratio (n) enhancement and significant resistance to bulging failure deformation. The concrete-stone column shows an enhancement related to increasing the concrete part length; also, the CSCs stiffness increases the surrounding loess soil capacity. The horizontal stresses of CSCs demonstrate the type of column failure behavior; the column may fail due to shear stress in a long concrete part case. Doi: 10.28991/CEJ-2022-08-10-01 Full Text: PDF

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