Model tests on single and groups of stone columns with different geosynthetic reinforcement arrangement

2014 ◽  
Vol 21 (2) ◽  
pp. 103-118 ◽  
Author(s):  
K. Ali ◽  
J.T. Shahu ◽  
K.G. Sharma
Keyword(s):  
Model Tests ◽  
Stone Columns ◽  
Geosynthetic Reinforcement

Model tests on geosynthetic-reinforced stone columns: a comparative study

2012 ◽  
Vol 19 (4) ◽  
pp. 292-305 ◽  
Author(s):  
K. Ali ◽  
J.T. Shahu ◽  
K.G. Sharma
Keyword(s):  
Comparative Study ◽  
Model Tests ◽  
Stone Columns

Smear zone identification and soil properties around stone columns constructed in-flight in centrifuge model tests

Géotechnique ◽  
2010 ◽  
Vol 60 (3) ◽  
pp. 197-206 ◽  
Author(s):  
T.M. WEBER ◽  
M. PLöTZE ◽  
J. LAUE ◽  
G. PESCHKE ◽  
S.M. SPRINGMAN
Keyword(s):  
Soil Properties ◽  
Model Tests ◽  
Stone Columns ◽  
Centrifuge Model ◽  
Centrifuge Model Tests

scholarly journals Laboratory Model Tests on Stone Column and Pervious Concrete Columns: A Comparative Study

2021 ◽  
Vol 12 (1) ◽  
pp. 75-89
Author(s):  
Jignesh Patel ◽  
Chandresh Solanki ◽  
Yogendra Tandel ◽  
Bhavin Patel
Keyword(s):  
Carrying Capacity ◽  
Deformation Behavior ◽  
Concrete Columns ◽  
Model Tests ◽  
Pervious Concrete ◽  
Stone Columns ◽  
Stone Column ◽  
Laboratory Model ◽  
Load Carrying Capacity ◽  
Load Carrying

This study aims to perform laboratory model tests to investigate the load-deformation behavior of stone columns (SCs), pervious concrete columns (PCCs), and composite columns (CCs). Here, CC refers to the column which has the upper portion made of PCC and the lower portion made of SC. The parameters investigated in this study include column diameters, column lengths, and installation methods (pre-cast and cast-in-situ methods). The results of the model tests reveal that the axial load-carrying capacity of PCC is nearly 8 times more than that of SC with the same diameter. Moreover, it is also observed that at the top portion of SC, with the PCC length which is about 3.75 to 5 times the column diameter, the load-carrying capacity can significantly increase. It is concluded that the installation methods have marginal influence on the load-deformation behavior of PCC.

scholarly journals Model Tests on Use of Tyre Chips and Fly Ash Chips as a Replacement of Aggregate in Stone Columns

2021 ◽  
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Soft Clay ◽  
Maximum Load ◽  
Model Tests ◽  
Stone Columns ◽  
Partial Replacement ◽  
Stone Column ◽  
Hydraulic Jack ◽  
Settlement Rate

Abstract. In order to reduce the generated waste in industry the concept of reusability is adopted as an application in the civil engineering field. In this study, the experiments were performed by using shredded tyre chips, chips of fly ash bricks in partial replacement with aggregates passing through 12.5 mm sieve and retaining on 10 mm sieve (IS-Indian standard). The experiments with partial replacement of stone columns were carried out at various proportions of tyre chips and fly ash brick chips in soft clay. Corresponding settlement rate was noted by loading the stone column gradually through a hydraulic jack for various L/D ratios. On comparison the final results it was concluded that the stone column with replacement of 75% tyre chips and 25% coarse aggregate proved good to carry maximum load and with lower settlement rate than ordinary stone column without replacement.

scholarly journals ANALYSIS OF COMBINED FOOTINGS ON EXTENSIBLE GEOSYNTHETIC-STONE COLUMN IMPROVED GROUND

2017 ◽  
Vol 8 (2) ◽  
pp. 57-71
Author(s):  
Priti Maheshwari
Keyword(s):  
Flexural Rigidity ◽  
Nonlinear Behavior ◽  
Bending Moment ◽  
Stone Columns ◽  
Stone Column ◽  
Model Parameters ◽  
Geosynthetic Reinforcement ◽  
Foundation Soil ◽  
Lumped Parameter ◽  
Soil Foundation

Analysis of combined footings resting on an extensible geosynthetic reinforced granular bed on stone column improved ground has been carried out in the present work. Various components of soil-foundation system have been idealized using lumped parameter modeling approach as: combined footing as finite length beam, granular layer as nonlinear Pasternak shear layer, geosynthetic reinforcement as elastic extensible membrane, stone columns as nonlinear Winkler springs and foundation soil as nonlinear Kelvin body. Hyperbolic constitutive relationships have been adopted to represent the nonlinear behavior of various elements of a soil-foundation system. Finite difference method has been employed to solve developed governing differential equations with the help of appropriate boundary and continuity conditions. A detailed parametric study has been conducted to study the effect of model parameters like applied load, flexural rigidity of footing, configuration of stone columns, ultimate bearing resistance of foundation soil and stone columns, tensile stiffness of geosynthetics and degree of consolidation on response of soil-foundation system by means of deflection and bending moment in the footing and mobilized tension in geosynthetic layer. These parameters have been found to have significant influence on the response of footing and the geosynthetic reinforcement layer. To quantify this, results have been nondimensionalized to produce design charts for ready use for the analysis of combined footings resting on such a soilfoundation system.

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