Experimental Studies on Behaviour of Stone Columns in Layered Soils

Shivashankar, R.; Babu, M. R. Dheerendra; Nayak, Sitaram; Rajathkumar, V.

doi:10.1007/s10706-011-9414-0

Cited by 50 publications

(20 citation statements)

References 7 publications

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“…This concept was described in detail by Barksdale and Bachus [30]. Many researchers [11,12,[31][32][33][34] have used unit cell concept for experimental investigations on granular piles. In practice, granular piles are constructed in typical diameters (d) varying between 0.6 m in case of stiff clays to 1.1 m in very soft clays and lengths ranging from 5 to 20 m [35].…”

Section: Modelling Considerationsmentioning

confidence: 99%

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Hasan

Samadhiya

2016

Int. J. of Geosynth. and Ground Eng.

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The installation of reinforced granular piles is a commonly adopted technique to improve load carrying capacity and reduce settlements in very soft clayey soils. This paper presents results of a series of laboratory model tests and numerical analysis carried on geosynthetic reinforced granular pile under short term loading. Unit cell concept has been adopted. Laboratory model tests were conducted on unreinforced, vertical encased, reinforced with horizontal strips and combined vertical-horizontal reinforced granular piles. The loading was applied either over the entire cylindrical tank area or only over the area of granular piles. The effects of various parameters such as reinforcement, encasement stiffness, shear strength of clay, length and diameter of granular piles have been studied. Experimental results in the form of vertical load intensitysettlement relationship have been compared with that obtained from PLAXIS 3D. The results of laboratory model tests indicated significant influence of reinforcement on the ultimate load intensity of granular piles and ultimate bearing capacity of treated ground. Lateral bulging in reinforced granular piles has also been controlled by incorporating geosynthetic materials.

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Section: Modelling Considerationsmentioning

confidence: 99%

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Hasan

Samadhiya

2016

Int. J. of Geosynth. and Ground Eng.

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“…Pribe proposed unit cell concept for estimating the settlement of foundation resting on the infinite grid of stone columns (Priebe, 1995). This concept has also been used by many researchers (Alamgir et al, 1996;Ambily and Gandhi, 2007;Gniel and Bouazza, 2009;Shivashankar et al, 2011).…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Behavior of Compacted Lime — (Well-graded) Soil columns: Large scale tests and numerical modelling

Malekpoor

Poorebrahim

2014

KSCE J Civ Eng

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This study presents the results of large scale laboratory model tests to investigate the behavior of Compacted Lime-Well-graded Soil (CL-WS) rigid stone columns in soft soils. Tests were carried out on composite specimens to evaluate the influence of different parameters such as: the diameter of the column, the slenderness ratio, area ratio and the shear strength of the surrounding soil. Finite element analysis has been also performed using PLAXIS software to compare the results of numerical and experimental modelling. In order to assess the real behavior of these columns, some tests have been carried out in the field. Based on the results, it was concluded that CL-WS columns increase the load carrying capacity of soft soils and reduce the settlement. In addition, the results show the influence of model size on the stiffness of the specimens which means that the load carrying capacity decreases by increasing the size of models. However, for specimens containing columns with diameter greater than 100 mm, the variations of stiffness become negligible and hence the results can be used to extrapolate and predict the full size behavior of these columns. A detailed comparison between the experimental and numerical modelling shows a very good agreement.

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“…Due to the symmetric loading condition, horizontal deformation is not allowed outside the boundary of the unit cell [4]. The load is imposed on, and should remain within, the unit cell [12]. A thin coat of lubricant is applied to the inner vertical surface of the tank in order to simulate the free movement by reducing the friction between the inner surface of the tank and the HG.…”

Section: Testing Tankmentioning

confidence: 99%

“…A gentle compaction effort is applied to the SC's material in order to avoid disturbing the surrounding HG and to ensure that the layer is packed without significant voids, also, to avoid breaking the stone. The compaction using minimum effort was suggested by [12,52,50]. The following layers are constructed in a similar manner until the full column length is achieved.…”

Section: Sc Constructionmentioning

confidence: 99%

The Experimental Design of Stone Columns' Modelling using Small-Scale Unit Cells: A Review

Almaliki¹,

Selamat²

2018

IJET

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This paper presents a review of the experimental design of the small-scale single stone column that adopts the unit cell concept. Materials and methods used in experiments along with their effects and implication have been appraised. The reviewed cases showed that clayey soils were often used to construct the host ground. Steel cylindrical tanks were used with diameters ranging from 15 to 60 cm and heights ranging from 20 to 120 cm. For such scale, the used stone size is 2 to 10 mm. Plates load test can be carried out on the entire tank or on the stone column. The load has been imposed at a constant settlement rate of 1 to 1.25 mm/min in order to simulate the stage immediately after construction. The review shows that remoulding and replacement have been often practised for the construction of the host ground and the stone column, respectively.

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Experimental Studies on Behaviour of Stone Columns in Layered Soils

Cited by 50 publications

References 7 publications

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Behavior of Compacted Lime — (Well-graded) Soil columns: Large scale tests and numerical modelling

The Experimental Design of Stone Columns' Modelling using Small-Scale Unit Cells: A Review

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