A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Behavior of Geogrid Reinforced Foundation Systems Supported on Clay Subgrades of Different Strengths
Abstract This paper presents an experimental study investigating the behaviour of geogrid reinforced sand-clay foundation systems with clay subgrades of different strengths. Model tests were carried out on a circular footing of 150 mm diameter (D) resting on 1 × 1 × 1 m foundation bed having clay subgrades of different undrained shear strengths (c u), ranging from 7 to 60 kPa. Different series of laboratory model tests were performed on homogeneous and layered foundation systems. The layered systems were comprised of dense sand of varying layer thicknesses (H = 0.63–2.19D) overlying the clay subgrades. Pressure-settlement responses obtained indicated that the foundation performances were largely influenced by footing settlement (s/D %), layer thickness (H), and subgrade strengths (c u). The results indicated that the planar geogrid reinforcement, placed at the sand-clay interface, can substantially improve the performance of the foundation beds depending on layer thickness and subgrade strength. A maximum of about 5.6-fold improvement in bearing capacity was observed in the study, for very soft clay subgrade of 7 kPa.
Behavior of Geogrid Reinforced Foundation Systems Supported on Clay Subgrades of Different Strengths
Abstract This paper presents an experimental study investigating the behaviour of geogrid reinforced sand-clay foundation systems with clay subgrades of different strengths. Model tests were carried out on a circular footing of 150 mm diameter (D) resting on 1 × 1 × 1 m foundation bed having clay subgrades of different undrained shear strengths (c u), ranging from 7 to 60 kPa. Different series of laboratory model tests were performed on homogeneous and layered foundation systems. The layered systems were comprised of dense sand of varying layer thicknesses (H = 0.63–2.19D) overlying the clay subgrades. Pressure-settlement responses obtained indicated that the foundation performances were largely influenced by footing settlement (s/D %), layer thickness (H), and subgrade strengths (c u). The results indicated that the planar geogrid reinforcement, placed at the sand-clay interface, can substantially improve the performance of the foundation beds depending on layer thickness and subgrade strength. A maximum of about 5.6-fold improvement in bearing capacity was observed in the study, for very soft clay subgrade of 7 kPa.
Behavior of Geogrid Reinforced Foundation Systems Supported on Clay Subgrades of Different Strengths
Biswas, Arghadeep (author) / Asfaque Ansari, Md. (author) / Dash, Sujit Kumar (author) / Murali Krishna, A. (author)
2015-07-07
10 pages
Article (Journal)
Electronic Resource
English
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