结构性饱和黄土动力特性试验研究  

LABORATORY TESTING STUDY OF DYNAMIC PROPERTIES OF SATURATED LOESS FOR EFFECT OF ITS INTERNAL STRUCTURE

作　　者：胡伟[1] 韩建刚[1] 

机构地区：[1]海南大学土木建筑工程学院,海口570228

出　　处：《工程地质学报》2009年第5期648-655,共8页Journal of Engineering Geology

基　　金：国家自然科学基金(50668001)

摘　　要：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。On the base of un - drained dynamic tri - axial shearing tests. It examines the rive influence tactors on the dynamic properties of saturated loess, where the loess has its original internal structure. The five factors are the initial consolidated pressure, the over - consolidation ratio, the consohdated ratio, the dynamic shearing stress ratio and the frequency. The results are compared to other references and analyzed in detail. The structure of saturated loess is emphasized. The destroy of the loess＇s internal structure is a turning point for the dynamic properties. It is reasonable to use plastic strain to describe the change of structure and constitute the supper - pore pressure model. The relevant formulation is also given.

关 键 词：饱和黄土 结构性 孔压 超固结比 偏压固结比 循环振次 应变 

分 类 号：P642[天文地球—工程地质学]