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为了对杭州湾海底粉质土在波浪荷载作用下的动力特性进行研究,选用杭州湾地区分布较广的粉土,通过一系列模拟不同振动频率的波浪荷载的动三轴试验,探讨了振动频率的变化对粉土动应变、动孔压和动强度的影响。试验结果表明:波浪荷载作用下振动频率的大小对土体的累积轴向应变和动强度有较大影响;振动频率的变化对动孔压的发展趋势的影响不明显,同时围压对动孔压比的影响很小,动孔压比与累积轴向应变的关系曲线具有良好的归一性。
In order to study the dynamic characteristics of sea silty soil in Hangzhou Bay under wave load, a series of simulating triaxial tests of wave loads with different vibration frequencies were adopted to study the effect of vibration frequency Effect of Variations on Dynamic Stress, Pore-hole Pressure and Dynamic Strength of Silt. The experimental results show that the vibration frequency has significant influence on the cumulative axial strain and dynamic strength of soil under the wave load. The change of vibration frequency has no obvious effect on the development trend of dynamic pressure. At the same time, The effect of pressure ratio is very small, and the relation curve between the pressure ratio of the hole and the cumulative axial strain has a good normality.