云南泥炭土力学特性实验及归一化性状研究  

Mechanical Testing of Yunnan’s Peat Soil and Study of Its Generalized Behavior

作　　者：熊恩来[1] 阮永芬[1] 刘文连 王云生 

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650224 [2]中国有色金属昆明勘察设计院,云南昆明650051

出　　处：《云南水力发电》2005年第2期39-42,共4页Yunnan Water Power

摘　　要：云南泥炭土作为一种特殊土类,其物理力学性质不同于一般粘土和有机质土,对这层土的力学特性的研究具有重要的理论意义和实用价值。文章通过三轴的不固结不排水、固结不排水剪切试验,对昆明泥炭、泥炭质土进行了实验研究,得到在不同围压下的轴向应力、周向应变和孔隙压力等参数之间的关系,以及土样的破坏形态。作为一种特殊土,其应力应变关系,孔压与应变关系是否存在归一化性状值得研究。The peat soil is of a special great soil group and its physical and mechanical properties are different from either ordinary clay or organic soil. The study of its mechanical properties is of great significance in both theory and practice. This paper has studied and clarified the relationship among the axial stress, the circumferential strain and the pore pressure and the failure features of the soil samples as well under various confining pressure states by conducting the unconsolidated and undrained triaxial shear test and the consolidated and undrained triaxial shear test of the peat and peat soil sampled in Kunming. Being as a special soil its normalized behavior is worthy of being further studied in terms of stress-strain relationship and pore pressure-strain relationship.

关 键 词：泥炭土 三轴实验 物理力学性质 剪切试验 孔隙压力 周向应变 

分 类 号：P642.114[天文地球—工程地质学]