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 language | English |
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Title of host publication | Near Surface Geoscience Conference & Exhibition 2017 |
Subtitle of host publication | Malmo, Sweden |
Publisher | EAGE |
Number of pages | 5 |
DOIs | |
Publication status | Published - 2017 |
Event | Near Surface Geoscience Conference & Exhibition 2017 - Clarion Hotel & Congress Malmö Live, Malmo, Sweden Duration: 3 Sept 2017 → 7 Sept 2017 Conference number: 23 https://events.eage.org/en/2017/23rd-european-meeting-of-environmental-and-engineering-geophysics |
Conference
Conference | Near Surface Geoscience Conference & Exhibition 2017 |
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Abbreviated title | Near Surface Geoscience'17 |
Country/Territory | Sweden |
City | Malmo |
Period | 3/09/17 → 7/09/17 |
Internet address |