Reliability of Shallow Bedrock Depth Determination from HVSR Measurements in Central Missouri
Publication: Geo-Congress 2023
ABSTRACT
Determining the depth to bedrock is important for a variety of geotechnical engineering applications such as foundation design and slope stability investigations. Direct determination of bedrock depth by drilling often provides only a sparce spatial sampling of depths. Geophysical methods, such as refraction, resistivity, and surface wave measurements, provide reliable estimates of bedrock depths but require extensive equipment deployment and expertise to interpret the data. In recent years, the horizontal to vertical spectral ratio (HVSR) method has found widespread application in seismology, earthquake engineering, and geotechnical engineering. HVSR requires only a single three-component sensor, uses ambient noise as the source, and, importantly, requires little expertise to determine the site frequency. The method is well suited as an inexpensive and non-intrusive complement to geotechnical site investigation programs. Specifically, the HVSR method can be used to estimate the depth of bedrock. Past studies have demonstrated the ability to derive region-specific relationships to estimate the depth to bedrock over depths to several hundred feet. In this study, we investigate the viability of HVSR measurements to determine the depth of shallow bedrock (tens of feet) over a more localized area (about 300 acres) in Central Missouri. Relationships between site frequency and bedrock depth are developed for these conditions, along with prediction bounds. The influence of variable bedrock conditions on the results is assessed and discussed.
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REFERENCES
Delgado, J., Lopez Casado, C., Giner, J., Estevez, A., Cuenca, A., and Molina, S. (2000). Microtremors as a geophysical exploration tool: applications and limitations. Pure and applied geophysics, 157(9), pp.1445–1462.
Gallipoli, M. R., Albarello, D., Mucciarelli, M., and Bianca, M. (2011). Ambient noise measurements to support emergency seismic microzonation: the Abruzzo 2009 earthquake experience. Boll. Geof. Teor. Appl, 52, pp.539–559.
Hinzen, K. G., Weber, B., and Scherbaum, F. (2004). On the resolution of H/V measurements to determine sediment thickness, a case study across a normal fault in the Lower Rhine Embayment, Germany. Journal of Earthquake Engineering, 8(06), pp.909–926.
Ibs-von Seht, M., and Wohlenberg, J. (1999). “Microtremor measurements used to map thickness of soft sediments.” Bulletin of the Seismological Society of America, 89(1), 250–259.
Nakamura, Y. (1989). A method for dynamic characteristics estimation of subsurface using microtremor on the ground surface. Quarterly Report of Railway Technical Research, 30, 25–33.
Lane, J., White, E., Steele, G., and Cannia, J. (2008). Estimation of Bedrock Depth Using the Horizontal-to-Vertical (H/V) Ambient-Noise Seismic Method. 490–502. https://doi.org/10.4133/1.2963289.
Lachet, C. D., and Bard, P.-Y. (1994). “Numerical and Theoretical Investigations on the Possibilities and Limitations of Nakamura’s Technique.” Journal of Physics of the Earth, 42, 377–397.
Parolai, S., Bormann, P., and Milkereit, C. (2002). “New Relationships between Vs, Thickness of Sediments, and Resonance Frequency Calculated by the H/V Ratio of Seismic Noise for the Cologne Area (Germany).” Bulletin of the Seismological Society of America, 92(6), 2521–2527.
Rosenblad, B., and Goetz, R. (2010). Study of the H/V spectral ratio method for determining average shear wave velocities in the Mississippi embayment. 112. 13–20. https://doi.org/10.1016/j.enggeo.2010.01.006.
SESAME. (2004). “Guidelines for the Implementation of the H/V Spectral Ratio Technique on Ambient Vibrations: Measurements, Processing, and Interpretation.”, European Commission – Research General Directorate.
Stanko, D., Markušić, S., Gazdek, M., Sanković, V., Slukan, I., and Ivančić, I. (2019). Assessment of the seismic site amplification in the city of Ivanec (NW Part of Croatia) using the microtremor HVSR method and equivalent-linear site response analysis. Geosciences, 9(7), p.312.
Wathelet, M., Chatelain, J., Cornou, C., Giulio, G., Guillier, B., Ohrnberger, M., and Savvaidis, A. (2020). Geopsy: A User‐Friendly Open‐Source Tool Set for Ambient Vibration Processing. Seismological Research Letters 2020, 91 (3), p 1878–1889.
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Published online: Mar 23, 2023
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