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Volume 38 Issue 1
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SUN Qi, DONG Quan-yang, CAI Yuan-qiang, WANG Jun, HU Xiu-qing, CAI Ying. Laboratory study on small-strain dynamic properties of sand by bender-extender element[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(1): 100-108. DOI: 10.11779/CJGE201601010
Citation: SUN Qi, DONG Quan-yang, CAI Yuan-qiang, WANG Jun, HU Xiu-qing, CAI Ying. Laboratory study on small-strain dynamic properties of sand by bender-extender element[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(1): 100-108. DOI: 10.11779/CJGE201601010
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Laboratory study on small-strain dynamic properties of sand by bender-extender element

  • 1. College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, China;
    2. The Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou 325035, China

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  • Received Date: December 29, 2014
  • Published Date: January 19, 2016
    Graphical Abstract
    • Abstract
  • Measurements of small-strain dynamic properties by bender elements are popular in recent years. However, the study of bender-extender elements is less mentioned, and their application in China has rarely been reported. In this study, the S-wave and P-wave velocities of Fujian sand are simultaneously measured by a single pair of bender-extender elements. In order to find the travel time for S-wave and P-wave, wider excitation frequencies and different methods are used, and reliable methods for the determination of the S-wave and P-wave velocities are obtained. The test results show that the peak-peak method and the cross-correlation method using 10~20 kHz excitation frequencies are exact and convenient. The small-strain properties, including shear modulus G0, constrained modulus M0 and Poisson's ratio υ, are determined for specimens by measuring the S-wave and P-wave velocities. G0 increases faster than M0 as the soil density and confining pressure increase. The Poisson's ratio decreases linearly with the increasing soil density and confining pressure. The results of this study provide effective methods for the further application of bender-extender elements.
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    • References (26)
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