结构性饱和黄土动力特性试验研究

摘要

On the base of un-drained dynamic tri-axial shearing tests. It examines the five influence factors onrnthe dynamic properties of saturated loess, where the loess has its original internal structure. The five factors are therninitial consolidated pressure, the over-consolidation ratio, the consolidated ratio, the dynamic shearing stress ratiornand the frequency. The results are compared to other references and analyzed in detail. The structure of saturatedrnloess is emphasized. The destroy of the loess's internal structure is a turning point for the dynamic properties. It isrnreasonable to use plastic strain to describe the change of structure and constitute the supper-pore pressure model.rnThe relevant formulation is also given.%基于室内不排水动三轴试验,研究了5种因素,即围压、超固结比、偏压固结比、动剪应力比、加载频率等对饱和黄土动力特性的影响.本文强调了结构性在饱和黄土动力特性研究中的重要性,结构性的破坏是影响土体动力力学特性的一个重要转折点.并阐明了用塑性残余变形来表征土体内部结构的变化并以此作为孔压增长函数自变量的合理性.