ISSN: 0149-6115
Page Count: 7

Direct Shear Interface Test for Shaft Capacity of Piles in Sand

Reddy, ES
JNTU College of Engineering, Kukatpally,

Chapman, DN
School of Civil Engineering, University of Birmingham,

Sastry, VVRN
Division of Engineering, Saint Mary's University,Nova Scotia,

(Received 3 September 1998; accepted 27 December 1999)

Abstract

For precise estimation of shaft capacity of a pile, it is essential to determine accurately the soil-pile interface friction angle (δ). The apparatus available to measure the value of δ, the miniature pile test apparatus and the soil-pile-slip test apparatus are only available for research purposes. This paper presents the details of an investigation carried out using the conventional direct shear test apparatus to measure the value of δ for soil-pile interface. The direct shear interface tests were conducted using four types of surfaces and two types of sands. The values of δ obtained from these tests are compared with the internal friction angle (φ) of the sand and with the results obtained from soil-pile-slip tests. The interface test results are also used to estimate the shaft capacity of a few model piles embedded in sand.

Keywords:
direct shear test, interface friction, internal friction, pile foundation, sand, shaft capacity

Paper ID: GTJ11044J
DOI: 10.1520/GTJ11044J
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