Prediction of long-term settlement on soft clay using shear wave velocity and damping characteristics |
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| Authors: | Mohamad Nor Omar Colin Peter Abbiss Mohd Raihan Taha Khairul Anuar Mohd Nayan |
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| Institution: | aRoad Engineering & Geotechnical Division, Public Works Department, Kuala Lumpur, Malaysia;b3, Marea Meadows, Heacham, Kings Lynn, Norfolk, PE31 7SR, UK;cDept. of Civil and Structural Engineering, Faculty of Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia |
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| 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%. |
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| Keywords: | Clay Shear modulus Damping Settlement Theoretical analysis Time dependence |
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