Search

Your search keyword '"Rajesh, Sathiyamoorthy"' showing total 28 results
Start Over Author "Rajesh, Sathiyamoorthy"
28 results on '"Rajesh, Sathiyamoorthy"'

11. The effect of stress-dependent SWRC on the load carrying capacity of the slope subjected to the drying-wetting path

Author

Jadar Chidanand M., Rajesh Sathiyamoorthy, and Roy Suman

Subjects
Environmental sciences, GE1-350
Abstract

The stability and load capacity of structures resting on compacted soil slopes is one of the major concerns in Geotechnical Engineering practice. The mechanically compacted earthen slopes are prone to the dynamic exchange of flux flow, resulting in varying saturation levels across their entire configuration. The soil water retention curve (SWRC) is a property which significantly controls the stability and load capacityof structures resting on these compacted soil slopes. The parameters of a typical SWRC are affected by net stress and climatic changes in field conditions, adding more complexity in evaluating the load capacity and stability of structures resting on these compacted soil slopes. To analyze this issue critically, the load capacity of a footing resting on an unsaturated compacted soil slope under year-long arid climatic conditions has been evaluated numerically in the present study. The effect of net stress has been considered by assessing the stress-dependent SWRC of chosen soil under the wetting and drying cycle at various net confinementsof 10 kPa, 100 kPa, and 200 kPa in the laboratory. Key parameters of the SWRCs under drying and wetting cycles were incorporated to evaluate the load capacity of the footing resting on the unsaturated soil slope.

Published
2023
Full Text
View/download PDF

19. Efficacy of Coupled Solid–Fluid Formulation in Regularizing an Ill-Posed Finite Element Model

Author

Rajesh Sathiyamoorthy, Arghya Das, and Rahul Singh

Subjects
Well-posed problem, 021110 strategic, defence & security studies, Deformation (mechanics), Consolidation (soil), Discretization, 0211 other engineering and technologies, 02 engineering and technology, Mechanics, Geotechnical Engineering and Engineering Geology, Finite element method, Shear (geology), Geotechnical engineering, Boundary value problem, Shear band, Geology, 021101 geological & geomatics engineering
Abstract

Analyzing instability in geomaterials in the form of shear localization using finite element discretization leads to erroneous results if the constitutive formulation does not contain any internal length scale. Thus, the solution becomes mesh dependent. The remedy of such problem is commonly known as regularization. Use of coupled solid–fluid formulation for the modeling of saturated porous media is one the remedial measures or regularizations schemes. The present study explores the efficacy of this regularization scheme by modeling the deformation in stone columns. Stone column is a ground improvement technique to accelerate consolidation settlement in low permeable soils. During consolidation, stone column also undergoes axial deformation along with the surrounding soil. The deformation mode in stone column is either punching or bulging or shear failure depending on the rate of loading and boundary conditions. Earlier studies indicate shear deformation in stone column is often associated with complex localized bands, which cannot be captured through the conventional analytical solutions. The present analysis using finite elements demonstrates that with mesh refinement the thickness of shear band within the stone column reduces despite using such coupled formulation. However, the overall time settlement profile of the column is unaffected by localization. In addition, the results are found to be affected by the selected time increment as the total consolidation time varies with the step time variation. The regularization scheme seems partially successful to model the localized deformation in stone columns.

Published
2018

24. Ground Improvement Techniques : Proceedings of the Indian Geotechnical Conference 2021 Volume 3

Author

Kasinathan Muthukkumaran, Rajesh Sathiyamoorthy, Arif Ali Baig Moghal, S. P. Jeyapriya, Kasinathan Muthukkumaran, Rajesh Sathiyamoorthy, Arif Ali Baig Moghal, and S. P. Jeyapriya

Subjects
Engineering geology, Building materials, Geotechnical engineering
Abstract

This book comprises the select peer-reviewed proceedings of the Indian Geotechnical Conference (IGC) 2021. The contents focus on Geotechnics for Infrastructure Development and Innovative Applications. The book covers topics related to ground improvement techniques, like stone columns, PVD, granular pile anchors, soil stabilization methods, like fly ash & chemicals, effect of biopolymer inclusion, innovative material for soil and ground improvement, among others. This volume will be of interest to those in academia and industry.

Published
2022

27. 3D coupled mechanical and hydraulic modeling of geosynthetic encased stone column-supported embankment over soft clay.

Author

Zhang, Xu, Rajesh, Sathiyamoorthy, Chen, Jian-Feng, Zhang, Zhen, and Li, Liang-Yong

Subjects
*EMBANKMENTS, *HYDRAULIC models, *MECHANICAL models, *CLAY soils, *STONE columns, *SHEAR strength, *CLAY
Abstract

Geosynthetic-encased stone column (GESC) has been proved as an effective alternative to reinforcing soft marine clay soils with low undrained shear strength. In this paper, three-dimensional (3-D) coupled mechanical and hydraulic modeling based on centrifugal model test was carried out to investigate the performance of GESC-supported embankment over soft clay with two different stiffness of encasement (i.e., 450 kN/m and 3300 kN/m). The numerical modeling results agree well with the centrifugal model test recordings. This investigation reveals that with the increase in the geogrid stiffness the differential settlement between the GESC and the surrounding soft marine clay soil was found to increase. Under the embankment load, the encased columns located below the embankment slope have experienced significant vertical and lateral stress ratio. Moreover, columns below the embankment slope tend to experience significant hoop strain below the top of the column. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results