Alternative Title
Paper No. 1.55
Location
St. Louis, Missouri
Date
10 Mar 1998, 9:00 am - 12:00 pm
Abstract
A method to predict lateral load-deflection relationships for single free-headed piles in clay, considering the non-linear modulus of the sub grade reaction is proposed on the basis of the analysis of full-scale test data on ten piles. The modulus of the horizontal subgrade reaction, kh, was obtained from the field load-deflection data of six piles in soft clay and four piles in stiff clay. The kh values depend on lateral (shear) strain, which is related to pile diameter and deflection. Empirical equations of normalized modulus degradation with shear strain have been proposed for both soft and stiff clays. The maximum value of the modulus of horizontal subgrade reaction, khmax, has been related with the undrained shear strength of clays. A comparison of the results from the present method and the p-y method with the measured load-deflection curves has also been made. The proposed method predicts upper and lower bound load-deflection curves which are valuable guides to making informed decisions.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Prakash, Shamsher and Chen, M. H., "Non-linear Lateral Pile Deflection Predictions in Clays" (1998). International Conference on Case Histories in Geotechnical Engineering. 58.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session01/58
Non-linear Lateral Pile Deflection Predictions in Clays
St. Louis, Missouri
A method to predict lateral load-deflection relationships for single free-headed piles in clay, considering the non-linear modulus of the sub grade reaction is proposed on the basis of the analysis of full-scale test data on ten piles. The modulus of the horizontal subgrade reaction, kh, was obtained from the field load-deflection data of six piles in soft clay and four piles in stiff clay. The kh values depend on lateral (shear) strain, which is related to pile diameter and deflection. Empirical equations of normalized modulus degradation with shear strain have been proposed for both soft and stiff clays. The maximum value of the modulus of horizontal subgrade reaction, khmax, has been related with the undrained shear strength of clays. A comparison of the results from the present method and the p-y method with the measured load-deflection curves has also been made. The proposed method predicts upper and lower bound load-deflection curves which are valuable guides to making informed decisions.
