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Volume 37 Issue 5
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WANG Yuan-zhan, YANG Pan-bo, SUN Xi-pin, LIU Han-qi, HU Shen-rong. Strength weakening of soft clay under cyclic loading and its dynamic calculation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(5): 821-828. DOI: 10.11779/CJGE201505007
Citation: WANG Yuan-zhan, YANG Pan-bo, SUN Xi-pin, LIU Han-qi, HU Shen-rong. Strength weakening of soft clay under cyclic loading and its dynamic calculation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(5): 821-828. DOI: 10.11779/CJGE201505007
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Strength weakening of soft clay under cyclic loading and its dynamic calculation

  • 1. National Key Laboratory of Water Conservancy Engineering Simulation and Security, Coll Aborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Tianjin University, Tianjin 300072, China; 2. CCCC First Harbor Engineering Design Institute Co., Ltd., Tianjin 300222, China; 3. Tianjin Research Institute for Transport Engineering, Tianjin 300456, China

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  • Received Date: July 07, 2014
  • Published Date: May 19, 2015
    Abstract
  • Strength reduction may take place for the littoral soft clay under the action of wave loading. As a result, the bearing capability of soft clay foundation will become significantly lower, and the stabilization of the structures will be affected. By performing cyclic triaxial tests on muddy-silty clay taken from Yantai littoral zone, variation of pore water pressure and weakening of undrained shear strength of clay subjected to different confining pressures, deviator stresses, dynamic stresses and cycle numbers are studied. According to the laws of the development of pore pressure, a model for calculating pore pressure is proposed. In addition, by using the theory of quasi-overconsolidation and combining the pore pressure model and the laws of undrained shear strength, a formula for strength weakening which contains confining pressures, deviator stresses, dynamic stresses and cycle numbers is put forward. The relevant experiment is done to verify the formula. Then it is applied to the dynamic numerical model of a breakwater in Yantai Port. From the experiment to the numerical model, a dynamic calculation method considering the effect of strength weakening which is convenient to be used in engineering is proposed completely.
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    • References (13)
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    HU Shen-rong

    • 1. National Key Laboratory of Water Conservancy Engineering Simulation and Security, Coll Aborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Tianjin University, Tianjin 300072, China; 2. CCCC First Harbor Engineering Design Institute Co., Ltd., Tianjin 300222, China; 3. Tianjin Research Institute for Transport Engineering, Tianjin 300456, China

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