Load Transfer Model of Pile-Soil Interface Based on the Disturbed State Concept

doi:10.12068/j.issn.1005-3026.2021.12.015

Abstract

Abstract: Based on the disturbed state concept(DSC)， it is assumed that the shear strength of the relative intact(RI)part of the pile-soil interface obeys the linear elastic theory， and the shear strength of the fully adjusted(FA)part obeys the ideal plastic theory， so that the pile-soil interface load transfer model can be established.A large-scale direct shear test was carried out on the pile-soil interface， which shows that the strain exhibits softening characteristics during the shear process between the pile and red clay interface， and the softening phenomenon becomes more significant with the increase of the normal stress.The strain exhibits slightly hardening characteristics during the shearing process between the pile and silty clay interface. The shear stress-shear displacement curves(τ-s curves) calculated by using the pile-soil interface load transfer model is in good agreement with the τ-s curves obtained from the direct shear test， which proved that the load transfer model of pile-soil interface based on DSC has a good accuracy and applicability.

Key words: disturbed state concept(DSC); pile-soil interface; load transfer model; τ-s curves; large-scale direct shear test

CLC Number:

TU473

JIA Yu， ZHANG Jia-sheng， ZHANG Fei， LIAO Xiang-ying. Load Transfer Model of Pile-Soil Interface Based on the Disturbed State Concept[J]. Journal of Northeastern University(Natural Science), 2021, 42(12): 1775-1781.

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