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Use of Rayleigh and Love waves in Seismic Surface wave testing
Dissertation (MEng (Geotechnical Engineering))--University of Pretoria, 2022.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2022
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| _version_ | 1867613651806978048 |
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| access_status_str | Open Access |
| author2 | Heymann, Gerhard |
| author_browse | Heymann, Gerhard |
| author_facet | Heymann, Gerhard |
| collection | Thesis |
| dc_rights_str_mv | © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Geotechnical Engineering))--University of Pretoria, 2022. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/83861 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:32.610Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/83861 Use of Rayleigh and Love waves in Seismic Surface wave testing Heymann, Gerhard u15246711@tuks.co.za Islam, Mohammed Shariful Rayleigh waves Love waves Joint Inversion CSW SASW Dispersion Curves UCTD Dissertation (MEng (Geotechnical Engineering))--University of Pretoria, 2022. Seismic surface wave tests have made an impact in the Geotechnical Engineering industry due to their non-invasive and inexpensive procedures for attaining important soil parameters, such as the small strain shear modulus (G0) by measuring the shear wave velocity (Vs) profile. Essentially, conventional surface wave tests incorporate Rayleigh waves alone due to the ease in their generation and detection in the fields. However, another type of surface wave, known as Love waves, is often neglected during testing due to the difficulties faced in integrating Love waves in the tests. The study explored the use of both Rayleigh and Love waves to obtain the Vs profile using synthetic data and experimental data, which was collected at two selected test sites. Two approaches were investigated for the generation of Love waves through the Continuous Surface Wave (CSW) tests and Spectral Analysis of Surface Wave (SASW) tests using standard test specifications. Surface wave signals from these tests were processed using Python based codes to determine and interpret the respective dispersion points. The dispersion data from both the synthetic and experimental data were used to conduct discrete and joint inversions, from which the spread in the Vs profiles was evaluated within misfit limits. The study demonstrated that by using both Rayleigh and Love waves in a joint inversion, the spread in the Vs can be reduced compared to using Rayleigh waves alone. However, this is only possible when the quality of the Rayleigh and Love wave signals are good. The generation of good quality Love wave signals remains a major problem when using joint inversions and it is recommended that newer and improved designs be tested and evaluated. Civil Engineering MEng (Geotechnical Engineering) Unrestricted 2022-02-14T11:17:01Z 2022-02-14T11:17:01Z 2022-04 2022 Thesis * A2022 http://hdl.handle.net/2263/83861 en © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Rayleigh waves Love waves Joint Inversion CSW SASW Dispersion Curves UCTD Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title | Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title_full | Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title_fullStr | Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title_full_unstemmed | Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title_short | Use of Rayleigh and Love waves in Seismic Surface wave testing |
| title_sort | use of rayleigh and love waves in seismic surface wave testing |
| topic | Rayleigh waves Love waves Joint Inversion CSW SASW Dispersion Curves UCTD |
| url | http://hdl.handle.net/2263/83861 |