Toggle Main Menu Toggle Search

Open Access padlockePrints

A correlation between friction angle and particle shape metrics in Quaternary coarse alluvia

Lookup NU author(s): Emeritus Professor Colin Jones

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

Very coarse-grained alluvia are challenging materials in geotechnical site characterization. The paper presents a method that can be used to find local correlations between the angle of friction and particle shape for very coarse-grained alluvia. The method is based on the results of a number of in situ direct shear tests carried out in horizontal galleries in the Quaternary coarse-grained alluvia of Tehran from which the angle of friction was determined. Following the in situ tests, images of the grains forming the alluvia were taken to determine their sphericity and roundness. The grain shapes were compared, based on a simple chart presented in previous research, and the importance of the sphericity/ roundness ratio for the engineering characteristics is identified. A relationship between the angle of friction, sphericity and roundness is proposed for the coarse-grained alluvia of Tehran. The advantages of the proposed correlation are the elimination of the need for difficult sampling for laboratory tests and/or the costs of in situ tests in low-cost projects or during the preliminary site characterization of large projects. Using this approach similar correlations could be proposed to determine the geotechnical properties of other very coarse-grained alluvia. © 2009 Geological Society of London.


Publication metadata

Author(s): Cheshomi A, Fakher A, Jones C

Publication type: Article

Publication status: Published

Journal: Quarterly Journal of Engineering Geology and Hydrogeology

Year: 2009

Volume: 42

Issue: 2

Pages: 145-155

Print publication date: 01/01/2009

ISSN (print): 1470-9236

ISSN (electronic): 2041-4803

Publisher: Geological Society Publishing House

URL: http://dx.doi.org/10.1144/1470-9236/07-052

DOI: 10.1144/1470-9236/07-052


Altmetrics

Altmetrics provided by Altmetric


Share