非饱和黄土土水特性与湿陷性关系分析  

Analysis on Relationship Between Collapsibility and Soil-Water Characteristics of Undisturbed Loess

作　　者：高凌霞[1,2] 栾茂田[2] 覃丽坤[1] 

机构地区：[1]大连民族学院土木建筑工程学院,辽宁大连116605 [2]大连理工大学土木水利学院岩土工程研究所,辽宁大连116024

出　　处：《大连民族学院学报》2013年第1期68-71,共4页Journal of Dalian Nationalities University

基　　金：中央高校基本科研业务费专项资金资助项目(DC120101103);建设部项目(k4201252)

摘　　要：针对在竖向应力不变的情况下,含水量的增加或吸力的减少会引起非饱和黄土湿陷的现象,利用压力板仪测试了非饱和原状黄土的土水特征曲线,采用非饱和土三轴仪得到相应土的湿陷变形,进而分析了土水特性曲线对原状黄土湿陷变形的影响。结果表明,非饱和黄土的渐变湿陷特性与土水特性曲线的形式和参数之间存在密切关系。该结果为采用类似土水特性曲线的预测模型来预测非饱和黄土随吸力变化的湿陷系数奠定了基础。Under the constant vertical stress, the increase of water content or reduction of suction can cause loess collapse. Using the pressure plate extractor and GDS, soil water characteristic curves and coefficient of collapsibility of unsaturated loess are obtained, respectively. In this pa- per we analyze the influence of soil water characteristic curve of undisturbed loess collapsibility deformation. The results indicate some features of the gradual collapse behavior of the loess and its relationship with the form and parameters of soil - water characteristic curves. The results of- fer a basis for predicting the loess collapse coefficient with the change of suction using prediction model similar to soil -water characteristic curves obtained in this paper.

关 键 词：湿陷变形 土水特性曲线 非饱和黄土 含水量 

分 类 号：TU411[建筑科学—岩土工程]