Interpretation of Seismic Cone Penetration Testing in Silty Soil

Rikke Holmsgaard, Lars Bo Ibsen, Benjaminn Nordahl Nielsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Five Seismic Cone Penetration Tests (SCPT) were conducted at a test site in northern Denmark where the subsoil consists primarily of sandy silt with clay bands. A portion of the test data were collected every 0.5 m to compare the efficacy of closely-spaced down-hole data collection on the computation of shear wave velocity. A minimum of eight seismic tests were completed at each depth in order to examine the reliability of shear wave velocity data, as well as to assess the impact of the time interval between CPT termination and seismic test initiation on SCPT results. The shear wave velocity was computed using three different methods: cross-over, cross-correlation and cross-correlation “trimmed with window”. In the “trimmed with window” technique the latter part of the signal is clipped off by setting the amplitude to zero. The result showed that more closely-spaced test intervals actually increased the variability of the shear wave velocity and that time interval between seismic tests is insignificant. Correlation between shear wave velocity and cone resistance for silty soils were also determined and assessed relative to other published data on multiple soil types.
Original languageEnglish
JournalElectronic Journal of Geotechnical Engineering
Volume21
Issue number15
Pages (from-to)4759-4779
ISSN1089-3032
Publication statusPublished - 2016

Fingerprint

silty soil
Shear waves
Cones
penetration
wave velocity
S-wave
Soils
Testing
cone penetration test
Silt
Clay
subsoil
test
soil type
silt
clay

Keywords

  • Field Testing
  • Site Investigations
  • Strength and Compressibility of Soils
  • Sampling and Related Field Testing for Soil Evaluations

Cite this

Holmsgaard, Rikke ; Ibsen, Lars Bo ; Nielsen, Benjaminn Nordahl. / Interpretation of Seismic Cone Penetration Testing in Silty Soil. In: Electronic Journal of Geotechnical Engineering. 2016 ; Vol. 21, No. 15. pp. 4759-4779.
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abstract = "Five Seismic Cone Penetration Tests (SCPT) were conducted at a test site in northern Denmark where the subsoil consists primarily of sandy silt with clay bands. A portion of the test data were collected every 0.5 m to compare the efficacy of closely-spaced down-hole data collection on the computation of shear wave velocity. A minimum of eight seismic tests were completed at each depth in order to examine the reliability of shear wave velocity data, as well as to assess the impact of the time interval between CPT termination and seismic test initiation on SCPT results. The shear wave velocity was computed using three different methods: cross-over, cross-correlation and cross-correlation “trimmed with window”. In the “trimmed with window” technique the latter part of the signal is clipped off by setting the amplitude to zero. The result showed that more closely-spaced test intervals actually increased the variability of the shear wave velocity and that time interval between seismic tests is insignificant. Correlation between shear wave velocity and cone resistance for silty soils were also determined and assessed relative to other published data on multiple soil types.",
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Interpretation of Seismic Cone Penetration Testing in Silty Soil. / Holmsgaard, Rikke; Ibsen, Lars Bo; Nielsen, Benjaminn Nordahl.

In: Electronic Journal of Geotechnical Engineering, Vol. 21, No. 15, 2016, p. 4759-4779.

Research output: Contribution to journalJournal articleResearchpeer-review

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