颗粒级配和结构对粉砂力学性质的影响

分析了几组原状、重塑和配制土样的静三轴试验结果，认为颗粒级配和结构性是影响粉砂应力．应变关系和强度特性的两个主要因素。当颗粒级配不同时，结构性原状粉砂土样和不具有结构性的配制土的强度均不同。相同颗粒级配的原状和重塑粉砂的强度也不同。而颗粒级配稍有不同的一种配制粉砂与原状粉砂在应力．应变关系和强度特性方面相接近。此种配制粉砂可替代原状粉砂做为模型试验用土。

Effects of grain size distribution and structure on mechanical behavior of silty sands

The triaxial compression test results of undisturbed ,remolded and reconstituted samples are analyzed . The grain-size distributions and the structure are considered to be two main factors which influence the stress-strain and strength behavior of silty sands. When the grain size distributions are not the same , not only the undisturbed samples with structure but also the reconstituted samples with non-structure are not similar in strength. The strength of remolded samples which have the same graine-size distributions as the undisturbed samples are different from that of the undisturbed samples. The stress-strain relationship and strength behaviors of one of reconstituted silty sands are very similar to those of the undisturbed samples although their grain-size distributions are different. This kind of reconstituted silty sand can substitute for the undisturbed silty sand in the model test.