Centrifuge modeling of disconnected piled raft using vertical pushover tests

A disconnected piled raft (DPR) foundation has been introduced as an effective pile design to reduce the vertical loading experienced by the pile. The characterization of DPRs has focused on the load transfer mechanism, foundation and soil settlement, bearing capacity, load distribution, and bending...

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Bibliographic Details
Published in:Acta geotechnica 2020-09, Vol.15 (9), p.2637-2648
Main Authors: Park, Heon-Joon, Ko, Kil-Wan, Song, Young-Hun, Song, Myung-Jun, Jin, Seokwoo, Ha, Jeong-Gon, Kim, Dong-Soo
Format: Article
Language:English
Subjects:
Axial loads
Axial stress
Bearing capacity
Behavior
Bending moments
Centrifuge model
Centrifuges
Civil engineering
Complex Fluids and Microfluidics
Computer simulation
Deformation
Distribution
Engineering
Foundation settlement
Foundations
Friction
Geoengineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Load distribution
Load distribution (forces)
Load transfer
Mechanical properties
Model testing
Numerical analysis
Piles
Raft foundations
Research Paper
Seismic engineering
Shallow foundations
Soft and Granular Matter
Soil
Soil bearing capacity
Soil Science & Conservation
Soil settlement
Solid Mechanics
Stress concentration
Vertical loads
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Summary:A disconnected piled raft (DPR) foundation has been introduced as an effective pile design to reduce the vertical loading experienced by the pile. The characterization of DPRs has focused on the load transfer mechanism, foundation and soil settlement, bearing capacity, load distribution, and bending moment of the piles. DPR piles can act to increase the bearing capacity of the ground, and DPRs can reduce settlement while securing the bearing capacity. In this study, centrifuge model tests are performed to simulate the static behavior of DPRs under actual stress conditions. The behaviors of the DPR foundation for axial load, axial load distribution among the piles, and bending moment are compared to those of the connected piled raft foundation to understand the complex behaviors of DPRs. The centrifuge test results show that DPRs help reduce the pile axial load and bending moment during vertical loading. In addition, DPRs show smaller vertical settlement than shallow foundations. Therefore, we confirm that DPRs can be applied in foundation design as settlement reducers.
ISSN:1861-1125
1861-1133
DOI:10.1007/s11440-020-00928-6