Evaluation of shear wave velocity profile using SPT based uphole method

Bang, Eun‐Seok; Kim, Dong-Soo

doi:10.1016/j.soildyn.2006.12.004

Cited by 27 publications

(18 citation statements)

References 6 publications

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“…The differences from each approach will be pointed out in the next items. Bang & Kim (2007) proposed the up-hole method for use with the mechanical SPT equipment currently used in North America, Europe, Japan and other countries. The SPT equipment currently used in Brazil is standardized by ABNT (2001).…”

Section: The Seismic Sptmentioning

confidence: 99%

“…It is carried out using a manual system and lightweight tripod. Bang & Kim (2007) pointed out some problems due to the use of the mechanical SPT equipment, such as the seismic noise caused by the vibration of the boring machine, the trigger installation and the exact definition of the depth where the seismic signal was generated by the SPT sampler. These problems are overcome with the system used in this study.…”

Section: The Seismic Sptmentioning

confidence: 99%

“…The seismic SPT described by Bang & Kim (2007) uses the SPT blow itself to generate the seismic waves. Tests were carried out at the Bauru research site to assess the quality of the seismic traces using this approach.…”

Section: Sourcementioning

confidence: 99%

“…This type of geophone is the same used by Campanella & Stewart (1992). Bang & Kim (2007) recommend using geophones with a lower natural frequency (4.5 to 10 Hz). The geophones were placed in six Figure 2 -Illustration of the seismic traces for the blow generated by different sources.…”

Section: Geophones and Installationmentioning

confidence: 99%

“…Some authors have demonstrated the possibility of incorporating the measurement of shear wave velocity in the SPT by the up-hole technique (Ohta et al, 1978;Bang & Kim, 2007;Pedrini, 2012). This hybrid test, called seismic SPT (S-SPT), allows verifying the stratigraphic profile, es-timating the geotechnical parameters and determining the shear wave velocity (Vs) profile.…”

Section: Introductionmentioning

confidence: 99%

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The Up-Hole Seismic Test Together with the SPT: Description of the System and Method

Pedrini¹,

Rocha²,

Giacheti³

2018

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A proper geotechnical site characterization has to identify the geometry of relatively homogeneous zones and define indices, strength and stiffness properties of the soils within these zones. The most widely used in situ test to define the stratigraphical profile and to estimate geotechnical parameters is the Standard Penetration Test (SPT). Although it is widely used, this test provides a single index to define a great number of parameters, a peculiar characteristic criticized by many authors. Some authors have shown that it is possible to incorporate the measurement of shear wave velocity (Vs) using the SPT and the up-hole seismic test. This hybrid test can be called the seismic SPT (S-SPT), combining stratigraphic logging, and estimation of geotechnical parameters and determination of shear wave velocity (Vs) values. This paper describes a system to carry out the seismic SPT and the approach to interpret the seismic data. Seismic SPT was carried out at three research sites in the state of São Paulo, Brazil to assess its applicability. The Vs values determined by this hybrid test were compared with Vs reference values determined through cross-hole, down-hole and seismic cone penetration tests. The differences between Vs values were, on average, 8.5%, 9.0% and 16.0% for each research site. The hybrid S-SPT test can be used to define the Vs and, consequently G 0 profile, together with the N-value determination.

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Section: The Seismic Sptmentioning

confidence: 99%

Section: The Seismic Sptmentioning

confidence: 99%

Section: Sourcementioning

confidence: 99%

Section: Geophones and Installationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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