Correlation of densities with shear wave velocities and SPT N values

Anbazhagan, P and Uday, Anjali and Moustafa, Sayed SR and Al-Arifi, Nassir SN (2016) Correlation of densities with shear wave velocities and SPT N values. In: JOURNAL OF GEOPHYSICS AND ENGINEERING, 13 (3). pp. 320-341.

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Abstract

Site effects primarily depend on the shear modulus of subsurface layers, and this is generally estimated from the measured shear wave velocity (Vs) and assumed density. Very rarely, densities are measured for amplification estimation because drilling and sampling processes are time consuming and expensive. In this study, an attempt has been made to derive the correlation between the density (dry and wet density) and V-s/SPT (standard penetration test) N values using measured data. A total of 354 measured Vs and density data sets and 364 SPT N value and density data sets from 23 boreholes have been used in the study. Separate relations have been developed for all soil types as well as fine-grained and coarse-grained soil types. The correlations developed for bulk density were compared with the available data and it was found that the proposed relation matched well with the existing data. A graphical comparison and validation based on the consistency ratio and cumulative frequency curves was performed and the newly developed relations were found to demonstrate good prediction performance. An attempt has also been made to propose a relation between the bulk density and shear wave velocity applicable for a wide range of soil and rock by considering data from this study as well as that of previous studies. These correlations will be useful for predicting the density (bulk and dry) of sites having measured the shear wave velocity and SPT N values.

Item Type:	Journal Article
Publication:	JOURNAL OF GEOPHYSICS AND ENGINEERING
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords:	density; SPT N value; shear wave velocity; correlation
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	19 Jul 2016 09:56
Last Modified:	21 Feb 2019 11:13
URI:	http://eprints.iisc.ac.in/id/eprint/54198

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