Surface wave surveys for imaging ground property changes due to a leaking water pipe

Dashwood, Ben; Gunn, David; Curioni, Giulio; Inauen, Cornelia; Swift, Russell; Chapman, David; Royal, Alexander; Hobbs, Peter; Reeves, Helen; Taxil, Julien. 2020 Surface wave surveys for imaging ground property changes due to a leaking water pipe. Journal of Applied Geophysics, 174, 103923. https://doi.org/10.1016/j.jappgeo.2019.103923

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Abstract/Summary

This study demonstrates the use of Multi-channel Analysis of Surface Waves (MASW) to measure changes in Rayleigh wave velocity relating to both the initial trench construction and subsequent simulated failures (water leaks) of a buried water-pipe. The MASW field trials were undertaken in conjunction with a wider suite of geophysical monitoring techniques at a site in South-west England, within an area of clayey sandy SILT. The Rayleigh wave velocity through a soil approximately equals the Shear wave velocity, which in turn is predominantly dependant on the shear modulus of the soil (G) and this can be inferred to give a measure of the relative strength of a soil. It is proposed that the time-lapse measurement of Rayleigh wave velocity may be used to monitor ongoing changes in soil strength and therefore the MASW technique could perform a significant role in monitoring the initiation/progression of any internal processes within a geotechnical asset, before they would otherwise be identified through visual inspection alone.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.jappgeo.2019.103923
ISSN:	09269851
Date made live:	13 Feb 2020 14:29 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/526882

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