Abstract

This paper presents a study of the influence of plastic and non-plastic fines on the resistance of sands to liquefaction. The study is carried out with the aid of a triaxial apparatus on reconstituted sand-fines mixtures at low fines content (≤ 5%). A description of the soils used in this study is first presented followed by the presentation of results of undrained monotonic liquefaction tests performed on sand specimens containing different fines fractions. Experimental results show that the increase in non-plastic fines content up to 5% increases the resistance of sand to liquefaction. Whereas the increase in plastic fines content reveals a decrease in the latter. This result is due to the contribution of the non-plastic fine particles to the overall chain forces and therefore they increase the resistance against liquefaction, however the decrease in the resistance with plastic fines could be attributed to their nature that lead to the sliding between the sand grains and therefore favour the contractancy of the whole specimen.

摘要

本文介绍了塑料和非塑料细粒对砂的抗液化性影响的研究。该研究是在三轴设备的帮助下对低细粉含量（≤ 5%）的重组砂-细粉混合物进行的。首先介绍本研究中使用的土壤，然后介绍对含有不同细粒部分的沙子样品进行的不排水单调液化试验的结果。实验结果表明，非塑性细粒含量最多增加 5% 会增加砂的抗液化能力。而塑料细粉含量的增加表明后者的减少。该结果是由于非塑性细颗粒对整体链力的贡献，因此它们增加了抗液化能力，