Modelling Time-lapse S-wave Velocity Changes in an Unsaturated River Dyke Due to Water Infiltration

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

18 Downloads (Pure)

Abstract

Understanding the effect of saturation is important in assessing the failure mechanism on the land-side of a river-dyke due to rising water level in a river after heavy rainfall. S-wave velocity is controlled by soil suction and degree of saturation. Therefore, there is a possibility to estimate the unsaturated soil properties from the temporal changes in S-wave velocity. For this purpose, we model the temporal changes in S-wave velocity due to seepage of water in a dyke under rainfall. We propose a new approach for interpolating/extrapolating experimental data, in order to obtain shear modulus as a function of suction and confining stress. The seepage analysis of a river dyke under heavy rainfall shows that the temporal change in the S-wave velocity is determined more by the shear modulus than by the density. Furthermore, the S-wave velocity at shallow depths is more sensitive to seepage than the S-wave velocity at greater depths. These, together with the fact that a simple relationship exists between the shear modulus, suction and saturation, lead us to the new possibility of predicting shear modulus as a function of suction from the time-lapse S-wave velocity monitoring.
Original languageEnglish
Title of host publicationNear Surface Geoscience Conference & Exhibition 2017
Subtitle of host publicationMalmo, Sweden
PublisherEAGE
Number of pages5
DOIs
Publication statusPublished - 2017
EventNear Surface Geoscience Conference & Exhibition 2017 - Clarion Hotel & Congress Malmö Live, Malmo, Sweden
Duration: 3 Sep 20177 Sep 2017
Conference number: 23
https://events.eage.org/en/2017/23rd-european-meeting-of-environmental-and-engineering-geophysics

Conference

ConferenceNear Surface Geoscience Conference & Exhibition 2017
Abbreviated titleNear Surface Geoscience'17
CountrySweden
CityMalmo
Period3/09/177/09/17
Internet address

Fingerprint

Dive into the research topics of 'Modelling Time-lapse S-wave Velocity Changes in an Unsaturated River Dyke Due to Water Infiltration'. Together they form a unique fingerprint.

Cite this