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Characterisation of granular soils with electromagnetic waves: some exploratory findings

Loy, Hui-Ting and Chan, Chee-Ming and Mohd Jenu, Mohd Zarar (2013) Characterisation of granular soils with electromagnetic waves: some exploratory findings. In: 6th Engineering Conference: energy and environment (ENCON 2013), 2-4 July 2013, Kuching, Sarawak.

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Abstract

A new method is developed for measuring electromagnetic properties of soil using the technique of Network Analyzer (NA). The method is applicable for characterization of granular soil in the laboratory and in the field for various other geotechnical purposes. A network analyzer is an instrument that measures the network parameters of electrical networks. A network analyzer commonly measures s-parameters because reflection and transmission of electrical networks are easy to measure at high frequencies. It is also often used to characterize two-port networks such as amplifiers and filters, but they can be used on networks with an arbitrary number of ports. The type of NA used in this study is NA Rohde & Schwarz (R&S). This study proposes a method of using NA technique for measuring density of soil and for various geotechnical purposes. In order to achieve these goals, the tests were conducted with various density of granular soil to get the dielectric constant, shear strength and shear wave velocity of each density. The result shows a linear relationship between the dielectric constant and the density. Based on this result, the dielectric constant is expected to be increased when the density increasing. For the next step planning, more granular soil specimens with increasing in density will be prepared for the tests to get more accurate results. At the same time, the investigations are carried out to study the effect of sample preparation and density in measurements and experimental result. This significant testing procedure on a variety of soil density is quick, safe and sufficiently accurate for measuring density of granular soils. This study develops the test methodology, and relationships of measured dielectric constant and with density of soil in characterising the granular soils.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: dielectric constant; shear strength; friction angle; sand
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions: Faculty of Engineering Technology > Department of Civil Engineering Technology
Depositing User: Normajihan Abd. Rahman
Date Deposited: 23 Jul 2013 01:25
Last Modified: 21 Jan 2015 07:58
URI: http://eprints.uthm.edu.my/id/eprint/4047
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