循环荷载下饱和重塑黏质粉土的动力特性研究

发布时间：2018-06-29 16:31

  本文选题：动三轴试验 + 相对动应力　； 参考：《水文地质工程地质》2017年01期

【摘要】：选取宁波饱和重塑黏质粉土,开展了黏质粉土的动三轴试验,研究了围压、动应力、排水条件、温度及频率等因素对土动力特性的影响,提出了采用相对动应力来分析不同围压、不同动应力下土的累积塑性应变变化规律,并建立了孔压—累积塑性应变关系的经验公式,结果表明:累积塑性应变随着相对动应力的增大而增大;温度越高,累积塑性应变值越小,且相同温度增量(△T=15℃)条件下的累积塑性应变增量也随之减小;建立的孔压-累积塑性应变经验公式可用于长期振动荷载作用后黏质粉土的孔压计算。
[Abstract]:The dynamic triaxial test of the clay silt was carried out in Ningbo saturated remolded clay. The effects of confining pressure, dynamic stress, drainage conditions, temperature and frequency on the dynamic characteristics of the soil were studied. The variation law of cumulative plastic strain of soil under different confining pressure and different dynamic stress is analyzed by using relative dynamic stress, and the empirical formula of the relationship between pore pressure and cumulative plastic strain is established. The results show that the cumulative plastic strain increases with the increase of relative dynamic stress, the higher the temperature, the smaller the cumulative plastic strain value, and the smaller the cumulative plastic strain increment is at the same temperature increment (T _ (15 鈩，

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