Journal ArticleDOI
Lateral Load Capacity and Passive Resistance of Full-Scale Pile Group and Cap
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In this article, a full-scale 3 x 3 pile group driven in saturated low-plasticity silts and clays was used for static and dynamic load tests on a reinforced concrete pile cap.Abstract:
Static and dynamic (statnamic) lateral load tests were performed on a full-scale 3 x 3 pile group driven in saturated low-plasticity silts and clays. The 324-mm outside diameter steel pipe piles were attached to a reinforced concrete pile cap (2.74 m square in plan and 1.21 m high), which created an essentially fixed-head end constraint. A gravel backfill was compacted in place on the back side of the cap. Lateral resistance was therefore provided by pile-soil-pile interaction as well as by base friction and passive pressure on the cap. In this case, passive resistance contributed about 40 percent of the measured static capacity. The measured resistance was compared with that computed by several techniques. The log-spiral method provided the best agreement with measured resistance. Estimates of passive pressure computed using the Rankine or GROUP p-y curve methods significantly underestimated the resistance, whereas the Coulomb method overestimated resistance. The wall movement required to fully mobilize ...read more
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Journal ArticleDOI
Cyclic Lateral Load Behavior of a Pile Cap and Backfill
Kyle M. Rollins,Ryan T. Cole +1 more
TL;DR: In this paper, a series of static cyclic lateral load tests were performed on a full-scale 4×3 pile group driven into a cohesive soil profile, where 12 324-mm steel pipe piles were attached to a concrete pile cap 5.18×3.
Modeling Pile Behavior in Large Pile Groups Under Lateral Loading
TL;DR: In this paper, a 3D finite-difference based numerical modeling approach was used to evaluate the lateral stiffness of a large pile group subject to only translational loading at the groundline, assuming that a rigid pile cap was present to enforce equal horizontal displacements of all pile heads.
Journal ArticleDOI
Prediction of Lateral Deflection of Small-Scale Piles Using Hybrid PSO–ANN Model
TL;DR: In this article, a hybrid model of particle swarm optimization (PSO) and artificial neural network (ANN) was proposed to predict the lateral deflection (LD) of piles under various conditions.
Journal ArticleDOI
A critical review: State of knowledge in seismic behaviour of helical piles
TL;DR: In this paper, the results of an extensive literature and industry search for previous seismic tests performed on helical piles are highlighted as well as the current design standards used in seismic regions.
References
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Journal ArticleDOI
Skin Friction between Various Soils and Construction Materials
TL;DR: In this article, the authors used several hundred experiments to determine the magnitude of skin friction, in which the following variables were considered: (1) Various construction materials: steel, wood, concrete; (2) For each material two surface conditions were used: smooth and rough; which are described in such a way that they may be reproduced by anyone with a reasonable degree of accuracy.
Journal ArticleDOI
Generalized Solutions for Laterally Loaded Piles
Hudson Matlock,Lymon C. Reese +1 more
TL;DR: In this article, a repeated application of elastic theory is used to determine the nonlinear force-deformation characteristics of soil, and soil modulus constants are adjusted for each successive trial until satisfactory compatibility is obtained in structure-pile-soil system.
Journal ArticleDOI
Lateral Load Behavior of Full-Scale Pile Group in Clay
TL;DR: In this article, a static lateral load test was performed on a full-scale pile group to determine the resulting pile-soil-pile interaction effects, and good agreement between the measured and computed pile group responses was obtained using the p-multiplier approach.
Related Papers (5)
Lateral Resistance of Full-Scale Pile Cap with Gravel Backfill
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