颗粒级配和结构对粉砂力学性质的影响  

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

作　　者：王淑云[1] 鲁晓兵[1] 时忠民[2] 

机构地区：[1]中国科学院力学研究所,北京100080 [2]中国海洋石油总公司,北京100027

出　　处：《岩土力学》2005年第7期1029-1032,共4页Rock and Soil Mechanics

基　　金：中国科学院知识创新十ˇ五重大项目;中国海洋石油总公司资助项目(No.KJCX-SW-L03)。

摘　　要：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。The triaxial compression test results of undisturbed, remo1ded 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.

关 键 词：粉砂 颗粒级配 结构性 强度 

分 类 号：TU411[建筑科学—岩土工程]