What question did this study set out to answer?

To determine how proximity to a slope crest influences the lateral load response and capacity of piles installed in cohesive soils.

November 10, 2017Journal of Geotechnical and Geoenvironmental Engineering

Full-Scale Tests on Effects of Slope on Lateral Capacity of Piles Installed in Cohesive Soils

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NNNontapat NimityongskulOregon State University YKYohsuke KawamataNational Research Institute for Earth Science and Disaster Resilience DRDeepak RayamajhiHill Engineering (United States)

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Implication

Full-scale testing demonstrates slope proximity reduces pile lateral capacity in cohesive soils, suggesting displacement-dependent adjustments within eight pile diameters.

Key Points

To determine how proximity to a slope crest influences the lateral load response and capacity of piles installed in cohesive soils.
Conducted full-scale lateral load tests using a hydraulic actuator on instrumented piles located in free-field conditions and at varying distances from a slope crest.
Monitored load-displacement behavior, axial strain, and rotation to back-calculate soil p-y curves and derive empirical p-multipliers for slope effects.
Slope proximity significantly decreased the maximum lateral load capacity of piles located within 8 pile diameters (8D) of the crest, with negligible effects observed beyond 8D.
Piles situated closer to the slope demonstrated reduced passive resistance at smaller displacements, though initial load-displacement stiffness remained uniform across all locations except at the crest (0D).
Calculated p-multipliers were displacement-dependent, showing larger values at small soil displacements and diminishing as displacement increased.

Cite This Study

Nimityongskul et al. (2017) studied this question.

synapsesocial.com/papers/6a009ec6ef8139f8ff779d6e https://doi.org/10.1061/(asce)gt.1943-5606.0001805

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Implication

Full-scale testing demonstrates slope proximity reduces pile lateral capacity in cohesive soils, suggesting displacement-dependent adjustments within eight pile diameters.

Full-Scale Tests on Effects of Slope on Lateral Capacity of Piles Installed in Cohesive Soils

Discussion

Member takes

Implication

Key Points

Cite This Study

Full-Scale Tests on Effects of Slope on Lateral Capacity of Piles Installed in Cohesive Soils

Discussion

Member takes

Implication

Key Points

Cite This Study

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