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Experimental study, numerical modeling of and axial prediction approach to base grouted drilled shafts in cohesionless soils
Abstract The pressure grouting of drilled shaft tips has become popular worldwide due to its effectiveness in mobilizing a larger portion of the available tip resistance under service displacements. This paper presents experimental and numerical studies on the load transfer mechanism and factors controlling the axial response of base grouted drilled shafts in cohesionless soils. The study found that the increased axial capacity of grout-tipped drilled shafts under service loads and displacements depended mainly on preloading effects and the increased tip area provided by the grouting process. A simple prediction approach for estimating the tip capacity of grouted shafts utilizing cone penetration resistance was suggested based on the results of the study. The validity of the proposed approach was verified by the analysis of full-scale case studies of grouted shafts reported in the literature.
Experimental study, numerical modeling of and axial prediction approach to base grouted drilled shafts in cohesionless soils
Abstract The pressure grouting of drilled shaft tips has become popular worldwide due to its effectiveness in mobilizing a larger portion of the available tip resistance under service displacements. This paper presents experimental and numerical studies on the load transfer mechanism and factors controlling the axial response of base grouted drilled shafts in cohesionless soils. The study found that the increased axial capacity of grout-tipped drilled shafts under service loads and displacements depended mainly on preloading effects and the increased tip area provided by the grouting process. A simple prediction approach for estimating the tip capacity of grouted shafts utilizing cone penetration resistance was suggested based on the results of the study. The validity of the proposed approach was verified by the analysis of full-scale case studies of grouted shafts reported in the literature.
Experimental study, numerical modeling of and axial prediction approach to base grouted drilled shafts in cohesionless soils
Thiyyakkandi, Sudheesh (author) / McVay, Michael (author) / Bloomquist, David (author) / Lai, Peter (author)
Acta Geotechnica ; 9 ; 439-454
2013-05-30
16 pages
Article (Journal)
Electronic Resource
English
Cone penetration resistance , Drilled shaft , Grouting , Load test , Load transfer , Numerical analysis , Tip resistance Engineering , Geoengineering, Foundations, Hydraulics , Continuum Mechanics and Mechanics of Materials , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics , Structural Mechanics
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