含粘粒量黄土抗震陷性能的试验研究  

Experimental study of the subsidence characteristics of clayey loess

作　　者：李兰[1] 王兰民[1] 

机构地区：[1]中国地震局地震预测研究所兰州科技创新基地中国地震局黄土地震工程开放实验室,兰州730000

出　　处：《水文地质工程地质》2007年第3期63-66,共4页Hydrogeology & Engineering Geology

基　　金：科技部社会公益专项(2004DIB3J130)

摘　　要：对甘肃含粘粒黄土粘粒含量不同的原状土样进行了室内动三轴试验、激光粒度分析试验、化学分析和电镜扫描试验,对比分析试验结果后得出,粘粒含量不同,可引起黄土动力稳定性的变化;动剪应力强度与粘粒含量并非呈单调增加关系,而呈抛物线型;含粘粒的黄土,在同一固结比时,抗震陷性能最低点在粘粒含量16%~17%之间。In this paper, the authors presented the results of experimental study and the analysis of the subsidence characteristics of clayey loess. The laboratory tests on soil examples that different content of day particles were conducted though dynamic triaxial test, laser grain-size test, chemical analysis and SEM examination. By the comparison of the obtained data, the following conclusions are draw： the stability of the loess varies with different content of clay, the relation between the dynamic shear strength and the clay particles is not monotonous, but is parabolic, and in the same consolidation ratio, the clayey loess is the weakest subsidence-resistant when the clay content is between 16% - 17%

关 键 词：抗震陷性能 粘粒含量 黄土 

分 类 号：P642.131[天文地球—工程地质学]