Improvement of Soft Soil Performance using Stone Columns Improved with Circular Geogrid Discs

Prasad, Sanjay; P.V.V, Satyanarayana

doi:10.17485/ijst/2016/v9i30/99186

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…Researchers are studying the possibility of using sustainable and recycled materials and their effect on improving weak soil properties (Ghazavi et al 2013a;M. A. Mohamad Ismail et al 2011;Siva Gowri Prasad et al 2016;Zahmatkesh et al 2010). It was agreed by many researchers who evaluated the effectiveness of filler materials and found their positive effect significantly in improving soil properties (George et al 2016;Nazaruddin et al 2013;Palaniappan et al 2013;Prasad et al 2015).…”

Section: Filler Materials Of Stone Columnsmentioning

confidence: 99%

A Review of Soil Stabilization Using Stone Columns Technique

Foda

AbdelKader

Ibrahim

2023

Delta University Scientific Journal

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Soft clay soils are in many coastal areas, these soils generally have high compressibility and don't provide required bearing capacity. Various techniques are used to improve these soils. The stone column technique has been successfully applied for the ground improvement. A stone columns technique is one of the soil stabilization methods that is used to increase strength, decrease the compressibility of soft and loose fine graded soils, accelerate a consolidation effect, and reduce the liquefaction potential of soils. They are mainly used for stabilization soft soil such as soft clays, silts, and silty sand. Several research has been conducted on the behavior and performance of stone columns with various materials utilized as column filler replacing the normal aggregate. This paper will review extensively on previously conducted research on some of the materials used as stone column backfill materials, its suitability, and the effectiveness as a substitute for regular aggregates in soft soil improvement works. This paper also discusses the techniques and methods of construction of stone columns. The bearing capacity of stone columns, and a combination of both methods in reinforced and unreinforced modes are presented using scaled physical models. The effect of various diameters with various depths in ground also reviewed. Results show that using stone column improves bearing capacity of soft soils and decreasing settlement. Using geotextile as stonecolumn encasement increases the efficiency of stone columns significantly. Finally, some guidance and recommendations are provided on parameter selection for the study of stone columns.

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Section: Filler Materials Of Stone Columnsmentioning

confidence: 99%

A Review of Soil Stabilization Using Stone Columns Technique

Foda

AbdelKader

Ibrahim

2023

Delta University Scientific Journal

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“…Various studies proposed that using horizontal layers of geosynthetics encasement helps to improve the bearing capacity and reduce lateral bulging [30][31][32]. Treedimensional numerical studies reported that short endbearing columns with GESC had higher bearing capacities than longer ones because they transmitted compressive load across their entire length and mobilised higher strains for a specifed settlement.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of a Dual-Layer Geosynthetic-Encased Stone Column Installed in Soft Soil

Kumar

Nirola

et al. 2023

Advances in Civil Engineering

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Stone columns are being used to reduce soft soil settlement and increase load-carrying capacity. Since there is inadequate lateral support from the local native soil, soft soil undergoes excessive settlement under vertical loading. This issue is effectively resolved by suitably encasing stone column material by geosynthetic with significant axial stiffness, which provides the required additional confinement reported in the literature. In the current study, an effort has been made to examine the load settlement behaviour of the dual-layered geosynthetic-encased stone column (DL-GESC) under vertical loading. In order to simulate the behaviour of stone column-reinforced soft soil, a FEM analysis was performed using PLAXIS-3D and three-dimensional (3D) models made utilising the unit cell idealisation technique for a single column. The stone column diameter, spacing to diameter (s/d) ratio, and encasement layers were varied to determine their influence on load-settling behaviour. The vertical load-carrying capacity of the ground was significantly improved when an additional layer of geosynthetic encasement was inserted into the stone column as compared to SL-GESC. Improvement of 15–25% was observed for the analysis of a single column installed in soft clay, according to the result obtained. Improvement ratios have been discussed in detail for various encasement conditions.

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