Uncertainties in the driving energy transferred to the split spoon sampler (Esampler) cause inaccuracies of the standard penetration test (SPT) N values. In this study, an energy monitoring module (E-module) is developed to evaluate Esampler and correct N. To demonstrate the application of the E-module, SPTs were performed at three study sites where the grounds are mainly composed of silty sands, and the transferred energy at the head of the driving rod (Ehead) and Esampler were evaluated. In addition, static penetration resistances were measured to validate the energy corrections of N. The experimental results and analyses indicate that the N corrected using Esampler exhibits an improved relationship with static penetration resistances compared with that corrected using Ehead because the Esampler directly affects the penetration of the split spoon sampler. Therefore, the evaluation of Esampler using the E-module and the correction of N may be used to obtain improved subsurface characterizations.
|Journal||Measurement: Journal of the International Measurement Confederation|
|Publication status||Accepted/In press - 2021|
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2020R1A2B5B03001470) and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2021R1A5A1032433).
- Dynamic penetration
- F-V integration method
- SPT N value
- Standard penetration test
- Transferred energy
ASJC Scopus subject areas
- Electrical and Electronic Engineering