论文部分内容阅读
为了能更好地反映粉粒夹层对自然界中沉积或吹填土层动力特性的影响,将土颗粒进行筛分后制备含粉粒夹层的饱和土样。采用应变控制加载方式进行一系列动三轴试验,分析了粉粒夹层对饱和砂土的抗液化强度和动孔隙水压力发展规律的影响。研究结果表明,粉粒夹层的存在对循环荷载作用下饱和砂土抗液化强度和动孔隙水压力的发展规律有显著影响,若忽视粉粒夹层对饱和砂土抗液化强度的影响,将会使液化判别得到偏于不利或保守的结论。
In order to better reflect the influence of silt interlayers on the dynamic characteristics of sediment or dredged soil in nature, the saturated soil samples containing silt intercalation were prepared by sieving the soil particles. A series of dynamic triaxial tests were carried out by means of strain control loading. The effects of silt sandwich on the liquefaction resistance and dynamic pore water pressure of saturated sand were analyzed. The results show that the presence of silt interlayers has a significant effect on the development of liquefaction resistance and dynamic pore water pressure of saturated sands under cyclic loading. Ignoring the effect of silt interlayers on the liquefaction resistance of saturated sands, Liquefaction discrimination is biased to unfavorable or conservative conclusions.