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

Research output: Contribution to journalArticle

Authors

  • Ben Dashwood
  • David Gunn
  • Cornelia Inauen
  • Russell Swift
  • Peter Hobbs
  • Helen Reeves
  • Julien Taxil

Colleges, School and Institutes

External organisations

  • British Geological Survey,
  • British Geol Survey

Abstract

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.

Details

Original languageEnglish
Article number103923
Number of pages12
JournalJournal of Applied Geophysics
Volume174
Early online date20 Dec 2019
Publication statusPublished - Mar 2020

Keywords

  • Geophysical monitoring, Multi-channel analysis of surface waves, Shear modulus, Trench excavation, Volumetric water content

ASJC Scopus subject areas