Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of Microtremor Horizontal to Vertical Spectra Ratio (MHVSR) and Multichannel Analysis of Surface Wave (MASW) for Shallow Bedrock Mapping for Transportation Projects
Mapping bedrock layers and their stiffness is an important part of geotechnical site characterization, particularly for highway projects that require significant rock excavation. A variety of invasive and non-invasive techniques can be used for this purpose. In this study, microtremor horizontal to vertical spectra ratio (MHVSR) and multichannel analysis of surface wave (MASW) methods were utilized along a proposed highway alignment, where the bedrock conditions are expected to be very shallow and highly variable. Two/three peaks were observed for the majority of the MHVSR measurements. The origin of the peaks was investigated using the proposed eye shape method in the literature and it was observed that an eye-shape spectral pattern is not always an accurate indicator of a peak with stratigraphic origin. MHVSR peaks in this study were determine to be of stratigraphy origin as they correspond well with the sharp impedance contrasts in the Vs profiles and subsurface layering from the boring logs. It seems that for cases of MHVSR with multiple peaks at very shallow bedrock sites, the peaks are reliable and they typically have a stratigraphy origin. This suggests that the MHVSR technique is a suitable non-destructive, rapid, and cost-effective alternative for traditional drilling and sampling for shallow bedrock mapping.
Application of Microtremor Horizontal to Vertical Spectra Ratio (MHVSR) and Multichannel Analysis of Surface Wave (MASW) for Shallow Bedrock Mapping for Transportation Projects
Mapping bedrock layers and their stiffness is an important part of geotechnical site characterization, particularly for highway projects that require significant rock excavation. A variety of invasive and non-invasive techniques can be used for this purpose. In this study, microtremor horizontal to vertical spectra ratio (MHVSR) and multichannel analysis of surface wave (MASW) methods were utilized along a proposed highway alignment, where the bedrock conditions are expected to be very shallow and highly variable. Two/three peaks were observed for the majority of the MHVSR measurements. The origin of the peaks was investigated using the proposed eye shape method in the literature and it was observed that an eye-shape spectral pattern is not always an accurate indicator of a peak with stratigraphic origin. MHVSR peaks in this study were determine to be of stratigraphy origin as they correspond well with the sharp impedance contrasts in the Vs profiles and subsurface layering from the boring logs. It seems that for cases of MHVSR with multiple peaks at very shallow bedrock sites, the peaks are reliable and they typically have a stratigraphy origin. This suggests that the MHVSR technique is a suitable non-destructive, rapid, and cost-effective alternative for traditional drilling and sampling for shallow bedrock mapping.
Application of Microtremor Horizontal to Vertical Spectra Ratio (MHVSR) and Multichannel Analysis of Surface Wave (MASW) for Shallow Bedrock Mapping for Transportation Projects
Rahimi, Salman (Autor:in) / Wood, Clinton M. (Autor:in) / Himel, Ashraf Kamal (Autor:in)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 622-632
21.02.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2020
| British Library Online Contents | 2008
Review on the Applications of Multichannel Analysis of Surface Wave (MASW) in Indian Subcontinent
| Springer Verlag | 2022