Scholte-wave propagation for near-surface soil stiffness profiling

Norinah Abd. Rahman, Sung Ho Joh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper presents the feasibility of using Scholte waves by spectral-analysis-of-surface-waves (SASW) method for near-surface soil stiffness profiling. Scholte-wave measurement does not require ground coupling thus fast SASW can be performed. Scholte wave propagation at the air-to-soil interface was analyzed first by Finite Element (FE) simulation. In the FE model, a coupled acoustic-structural model was employed to simulate Scholte-wave propagation and acoustic wave contamination were controlled by sensor insulation. Field testing at several compaction sites based on FE results was performed. We found that the dispersion curve of Scholte waves agrees well with Rayleigh-wave dispersion curve if sensors are perfectly insulated. Higher phase velocity is observed when Scholte waves are interrupted by acoustic wave. However, 1 cm opening at the bottom of insulated microphone can be considered as perfect insulation.

Original languageEnglish
Pages (from-to)1183-1190
Number of pages8
JournalKSCE Journal of Civil Engineering
Volume21
Issue number4
DOIs
Publication statusPublished - 1 May 2017

Fingerprint

Wave propagation
Stiffness
Soils
Surface waves
Spectrum analysis
Insulation
Acoustic waves
Rayleigh waves
Phase velocity
Sensors
Microphones
Compaction
Contamination
Acoustics
Testing
Air

Keywords

  • air-coupled sensors
  • near-surface soil stiffness
  • numerical modeling
  • SASW
  • Scholte waves

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Scholte-wave propagation for near-surface soil stiffness profiling. / Abd. Rahman, Norinah; Joh, Sung Ho.

In: KSCE Journal of Civil Engineering, Vol. 21, No. 4, 01.05.2017, p. 1183-1190.

Research output: Contribution to journalArticle

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