Prediction of long-term settlement on soft clay using shear wave velocity and damping characteristics

Nor Omar Mohamad Nor Omar, Colin Peter Abbiss, Mohd. Raihan Taha, Khairul Anuar Mohd Nayan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a method of calculating long-term settlement of a loaded pad on soft clay at Klang, Selangor, Malaysia where the soil model is treated as an anelastic material of viscoelastic property. Initially, an elastic shear modulus (G) value from shear wave velocity profiles of the seismic tests from spectral analysis of surface wave (SASW) and continuous surface wave (CSW) tests was obtained. A value of damping (D) at an equivalent elastic strain is then calculated from the hysteresis of the plate load tests corrected to equivalent strain using the Damping-Strain formula. The calculated elastic settlement and its equivalent damping are then used to calculate the long-term settlement by applying the generalised viscoelastic formula. Comparisons to traditional methods of settlement predictions were made and the viscoelastic formula has shown better agreement to the observed settlement. Further modification of the settlement formula is introduced to improve the settlement accuracy to 10%.

Original languageEnglish
Pages (from-to)259-270
Number of pages12
JournalEngineering Geology
Volume123
Issue number4
DOIs
Publication statusPublished - 21 Nov 2011

Fingerprint

wave damping
Shear waves
soft clay
damping
wave velocity
S-wave
Clay
Damping
Surface waves
surface wave
prediction
shear modulus
velocity profile
hysteresis
Spectrum analysis
spectral analysis
Hysteresis
Loads (forces)
Elastic moduli
Soils

Keywords

  • Clay
  • Damping
  • Settlement
  • Shear modulus
  • Theoretical analysis
  • Time dependence

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

Prediction of long-term settlement on soft clay using shear wave velocity and damping characteristics. / Mohamad Nor Omar, Nor Omar; Abbiss, Colin Peter; Taha, Mohd. Raihan; Mohd Nayan, Khairul Anuar.

In: Engineering Geology, Vol. 123, No. 4, 21.11.2011, p. 259-270.

Research output: Contribution to journalArticle

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N2 - This paper presents a method of calculating long-term settlement of a loaded pad on soft clay at Klang, Selangor, Malaysia where the soil model is treated as an anelastic material of viscoelastic property. Initially, an elastic shear modulus (G) value from shear wave velocity profiles of the seismic tests from spectral analysis of surface wave (SASW) and continuous surface wave (CSW) tests was obtained. A value of damping (D) at an equivalent elastic strain is then calculated from the hysteresis of the plate load tests corrected to equivalent strain using the Damping-Strain formula. The calculated elastic settlement and its equivalent damping are then used to calculate the long-term settlement by applying the generalised viscoelastic formula. Comparisons to traditional methods of settlement predictions were made and the viscoelastic formula has shown better agreement to the observed settlement. Further modification of the settlement formula is introduced to improve the settlement accuracy to 10%.

AB - This paper presents a method of calculating long-term settlement of a loaded pad on soft clay at Klang, Selangor, Malaysia where the soil model is treated as an anelastic material of viscoelastic property. Initially, an elastic shear modulus (G) value from shear wave velocity profiles of the seismic tests from spectral analysis of surface wave (SASW) and continuous surface wave (CSW) tests was obtained. A value of damping (D) at an equivalent elastic strain is then calculated from the hysteresis of the plate load tests corrected to equivalent strain using the Damping-Strain formula. The calculated elastic settlement and its equivalent damping are then used to calculate the long-term settlement by applying the generalised viscoelastic formula. Comparisons to traditional methods of settlement predictions were made and the viscoelastic formula has shown better agreement to the observed settlement. Further modification of the settlement formula is introduced to improve the settlement accuracy to 10%.

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