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Indexed by:Journal Papers

Date of Publication:2019-12-01

Journal:MEASUREMENT

Included Journals:SCIE

Volume:148

ISSN No.:0263-2241

Key Words:Shear wave velocity; Testing device; PMMA; Fujian sand; Gravel

Abstract:A torsional vibration testing device was designed, fabricated and installed to measure the shear wave velocity of coarse grained soils in a large-scale triaxial testing apparatus. The reliability verification was carried out on a pair of polymethyl methacrylate (PMMA) specimens. The test results demonstrate that the designed testing system can produce torsional vibration and measure the shear wave velocity with high accuracy. In a different set of tests, the small strain modulus was measured for a type of clean sand (Fujian sand) and gravel at different effective confining pressures. The measured small strain modulus of the Fujian sand are in good agreement with existing studies. The measured small strain modulus of well-graded gravel is more sensitive to the variation of effective confining pressure. The results demonstrate that the testing device can be effectively use for shear wave measurement in coarse grained soils. (C) 2019 Elsevier Ltd. All rights reserved.