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| Titel |
Use of surface waves for geotechnical engineering applications in Western Sydney |
| VerfasserIn |
K. Tokeshi, P. Harutoonian, C. J. Leo, S. Liyanapathirana |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 8th EGU Alexander von Humboldt Conference "Natural Disasters, Global Change, and the Preservation of World Heritage Sites" ; Nr. 35 (2013-06-27), S.37-44 |
| Datensatznummer |
250019095
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| Publikation (Nr.) |
 copernicus.org/adgeo-35-37-2013.pdf |
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| Zusammenfassung |
| Current in situ methods used to geotechnically characterize the ground are
predominantly based on invasive mechanical techniques (e.g. CPT, SPT, DMT).
These techniques are localized to the tested area thus making it quite time
consuming and costly to extensively cover large areas. Hence, a study has
been initiated to investigate the use of the non-invasive Multichannel
Analysis of Surface Waves (MASW) and Multichannel Simulation with One
Receiver (MSOR) techniques to provide both an evaluation of compacted ground
and a general geotechnical site characterization. The MASW technique relies
on the measurement of active ambient vibrations generated by sledgehammer
hits to the ground. Generated vibrations are gathered by interconnected
electromagnetic geophones set up in the vertical direction and in a linear
array at the ground surface with a constant spacing. The MSOR technique
relies on one sensor, one single geophone used as the trigger, and multiple
impacts are delivered on a steel plate at several distances in a linear
array. The main attributes of these non-invasive techniques are the cost
effectiveness and time efficiency when compared to current in situ mechanical
invasive methods. They were applied to infer the stiffness of the ground
layers by inversion of the phase velocity dispersion curves to derive the
shear wave velocity (Vs) profile. The results produced by the MASW and
the MSOR techniques were verified against independent mechanical Cone
Penetration Test (CPT) and Standard Penetration Test (SPT) data. This paper
identifies that the MASW and the MSOR techniques could be potentially useful
and powerful tools in the evaluation of the ground compaction and general
geotechnical site characterization. |
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