Site Soil Classification Interpretation Based on Standard Penetration Test and Shear Wave Velocity Data
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2021.53.2.6Keywords:
bedrock, shear wave velocity, site factor, site soil classification, spectral acceleration, standard penetration pressureAbstract
Site soil classification provides vital information for predicting the soil amplification or the site factor. The site factor is important for calculating the surface spectral acceleration in the seismic design of buildings. Based on the Indonesian seismic code, site soil classification can be conducted by calculating the average standard penetration (N-SPT) resistance, the average shear wave velocity (VS) and the average undrained soil strength (Su) of the upper 30 m of a subsoil layer. Different results may be obtained at the same location when the site soil classification is predicted using N-SPT than when using VS data. The restriction of N-SPT values until a maximum of 60 compared to a VS maximum of 750 m/sec can produce different soil classes and will directly impact the calculation of the surface spectral acceleration. This paper describes the different results of site soil classification prediction calculated using the average N-SPT and the average VS, conducted at Semarang City, Indonesia. Site soil classification maps developed based on both datasets are also presented, to evaluate the different site soil classification distributions. Only soil classes SD and SE were observed using N-SPT maximum 60, whereas soil classes SC, SD and SE were observed using N-SPT maximum 120.
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References
Ministry of Public Work and Human Settlements, Spectral Design of Indonesia, http://rsapuskim2019.litbang.pu.go.id/ (15 August 2020)
SNI 1726:2019, Seismic Resistance Design Codes for Building and Other Structures, Indonesian National Standardization Agency, 2019.
ASCE/SEI 7-16, Minimum Design Loads and Associated Criteria for Buildings and Other Structures. American Society of Civil Engineers, 2017.
Fazlavi M. & Haghshenas E., Technical Note Importance of Mode Detection in Ambient Noise Array Application for Shear Wave Velocity Profile Determination, International Journal of Civil Engineering, 13(1), Geotechnical Engineering, pp. 62-72, 2015.
Gosar A., Study on the Applicability of the Microtremor HVSR Method to Support Seismic Microzonation in the Town of Idrija (W Slovenia), Natural Hazards Earth Systems Science, 17, pp. 925-937, 2017.
Hayashi, K. & Underwood, D., Microtremor Array Measurements and Three-component Microtremor Measurements in San Francisco Bay Area, 15 WCEE, Lisboa, pp. 9588-9597, 2012.
Koesuma, S., Ridwan, M., Nugraha, A.D., Widiyantoro S. & Fukuda, Y., Preliminary Estimation of Engineering Bedrock Depths from Microtremor Array Measurements in Solo, Central Java, Indonesia, Journal of Mathematics and Fundamental Science, 49(3), pp. 306-320, 2017.
Jahanger, Z.K., Relation between Standard Penetration Test and Skin Resistance of Driven Concrete Pile in over Consolidated Clay Soil, Journal of Engineering, 5(5), 2011.
Zhenghu, H.Z, Zianhui, H.D. & Jianbo, B.Z., A Rapid and Nondestructive Method to Determine Normal and Shear Stiffness of a Single Rock Joint Based on 1D Wave-propagation Theory, Geophysics, 83(1), pp. 1-12, 2018.
Ohsaki, Y. & Iwasaki, R., On Dynamic Shear Moduli and Poisson?s Ratio of Soil Deposits, Soils and Foundations, 13(4), pp. 59-73, 1973.
Ohta, Y. & Goto, N., Empirical Shear Wave Velocity Equations in Terms of Characteristic Soil Indexes, Earthquake Engineering and Structural Dynamics, 6, pp. 167-187, 1978.
Imai, T. & Tonouchi, K., Correlation of N Value with S-wave Velocity and Shear Modulus, Second European Symposium on Penetration Testing, Amsterdam, The Netherlands, pp. 67-72, 1982.
Maheswari, U. R., Boominathan, A. & Dodagoudar, G. R. Development of Empirical Correlation Between Shear Wave Velocity and Standard Penetration Resistance in Soils of Chennai City, 14th World Conference on Earthquake Engineering, Beijing, China, 2008.
Dikmen, U., Statistical Correlations of Shear Wave Velocity and Penetration Resistance for Soils, Journal of Geophysics and Engineering, 6, pp. 61-72, 2009.
Partono, W., Wardani S.P.R., Irsyam M. and Maarif S., Development of Seismic Microzonation Maps of Semarang, Indonesia, Jurnal Teknologi, 77(11), pp. 99-107, 2015.