A numerical study of pre-boring impacts on side friction of piles

Document Type

Conference Proceeding

Publication Date

1-1-2019

Abstract

In this paper, a feasible finite element technique, using a one-dimensional disk to represent the soil around the pile, is developed with ABAQUS program to explore the impacts of the size of pilot hole on the long-term load carrying capacity of pre-bored piles. The proposed finite element model incorporates cavity expansion theory along with Biot's coupled consolidation theory to capture the change of stress state of the surrounding soil. The long-term side capacity is examined by applying vertical shear displacement on the soil element adjacent to the pile until the ultimate state is reached. Based on the proposed numerical model, a set of reduction factor curves pertaining to the unit side friction are presented for various combinations of pre-bore size and soil conditions, which are expected to provide guidelines for the design and construction of pre-bored piles.

Publication Source (Journal or Book title)

Geotechnical Special Publication

First Page

140

Last Page

148

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