Laboratory Investigation of Load Incremental Effect on the Deformation of Clay Under Axially Loaded Modeled Circular Piles

Adejumo, Taiye W.; Alhassan, Musa; Boiko, I. L.

doi:10.1016/j.proeng.2013.04.013

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…2, in the post graduate laboratory of the Department of Geotechnics & Civil Engineering, Faculty of Civil Engineering, Belarusian National University, Minsk, Belarus. A detailed, easy-to-follow procedure on this has been covered in my earlier works; Adejumo et al [25] and Adejumo [26]. Test results were collected and collated for further analysis.…”

Section: Laboratory Investigationsmentioning

confidence: 99%

Stress Distribution in Soils under Pile Cap of Tapered Piles in Compressible Clay

Adejumo¹

2014

IOSRJEN

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-This research paper presents the results of comprehensive investigations on stress distribution in soils under pile cap of tapered piles in compressible clay. Compressible clay from Urucha and Shabani, area of Minsk province, Belarus was investigated in this work. The former was used for laboratory investigation, while field tests were conducted on the latter respectively. The results show the influence of axial compressive load on the magnitude, pattern and orientation of stresses in soils under the pile cap of loaded modeled instrumental piles bored into compressive clay soil. Stresses in the soils at different depths under the pile cap with reference to pile center lines were measured and compared with those obtained using Boussinesq's theory. Measured stresses are slightly higher than those calculated using the theory. The investigations also showed that, for tapered piles bored in compressive clay, the stress increases towards the center line of pile-pile cap joint irrespective of tapering angle only up to 0.5m below the cap, (model), beyond this point, the magnitude and pattern of stress changes. The vertical normal stress under the pile cap increases from zero at the surface to 42% in depth lower than 3.5R, and 55% beyond this point. The maximum principal stress is directed along the radius vector R and reduces radially outward from the pile centerline. The normal and shear stress vectors are less in pile with higher center to center spacing. In addition, stress distribution under pile cap is also a function of pile spacing and tapering angle. Clearly striated stressed zones of deformation under loaded pile cap, having depth in multiples of pile diameter were observed.

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Section: Laboratory Investigationsmentioning

confidence: 99%

Stress Distribution in Soils under Pile Cap of Tapered Piles in Compressible Clay

Adejumo¹

2014

IOSRJEN

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Impact of artificial footing in pile-adjacent zone on operation of laterally-loaded single pile foundation

Lanko¹,

Kondratieva²,

Евстратов³

et al. 2019

Geotechnics Fundamentals and Applications in Construction: New Materials, Structures, Technologies and Calculations

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An Experimental and Numerical Study on Behaviour of Single Pile and Group of Piles in Layered Soils under Vertical Load

Deb¹,

Pal²

2016

IJERT

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The behaviour of single and group pile in multiple layered soils is studied herein. This paper describes a prototype test on model pile groups of configuration 1×1, 2×2, and 3×3, for embedment length to diameter ratios (L/D) of 5, 6, 7 and 8, and spacing 3 times of diameter, subjected to vertical loads are conducted on three layers of different soil type maintaining equal depth for each of the layers. The model piles used for the test are 250 mm in length with 25mm diameter and a test tank of dimension 700mm × 700mm × 600mm was used. This work also uses 3D finite element modelling on ABAQUS to analyse the effect of soil properties, pile length-to-diameter ratio and timedependent load-settlement behaviour on the capacity of a pile. Experimental investigations are made to relate the loadsettlement characteristics of different pile configuration with their respective length-to-diameter ratio, ultimate load with respect to their length to diameter ratio, load improvement ratio with number of pile and efficiency of pile group in each pile configuration. The test results indicate that pile capacity increases with the increase of number of pile and length-todiameter ratios and load improvement ratio increases with increase of number of piles. It is perceived that 3×3 group piles have almost 5-8 times and 2×2 group piles have almost 2-3 times greater load carrying capacity than the single piles. The numerical analyses i.e. finite element analyses (FEA) describe the variation of stress, strain and stain energy with respect to time and demonstrate the variation of pile-soil stress ratio with different embedded length.

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Laboratory Investigation of Load Incremental Effect on the Deformation of Clay Under Axially Loaded Modeled Circular Piles

Cited by 3 publications

References 16 publications

Stress Distribution in Soils under Pile Cap of Tapered Piles in Compressible Clay

Stress Distribution in Soils under Pile Cap of Tapered Piles in Compressible Clay

Impact of artificial footing in pile-adjacent zone on operation of laterally-loaded single pile foundation

An Experimental and Numerical Study on Behaviour of Single Pile and Group of Piles in Layered Soils under Vertical Load

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