[1]杨松,吴珺华,卢廷浩,等.非饱和云南红黏土的不排气不排水变形特性研究[J].郑州大学学报(工学版),2012,33(05):53-56.[doi:10.3969/j.issn.1671-6833.2012.05.012]
　YANG Song,WU Junhua,LU Tinghao,et al.Study on Unventilated-undrained Deformation Behavior ofYunnan Red Cohesive Soil[J].Journal of Zhengzhou University (Engineering Science),2012,33(05):53-56.[doi:10.3969/j.issn.1671-6833.2012.05.012]
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非饱和云南红黏土的不排气不排水变形特性研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
33卷
期数:
2012年05期
页码:
53-56
栏目:
出版日期:
2012-09-10

文章信息/Info

Title:
Study on Unventilated-undrained Deformation Behavior ofYunnan Red Cohesive Soil
作者:
杨松; 吴珺华; 卢廷浩; 等.
云南农业大学水利水电与建筑学院,云南昆明,650201, 南昌航空大学土木建筑学院,江西南昌,330063, 河海大学土木与交通学院,江苏南京,210098, 云南农业大学教务处农科实验中心,云南昆明,650201
Author(s):
YANG Song; WU Junhua; LU Tinghao; etc;
1.College of Hydraulic and Architeelural Engineering, Yunnan Agricultural University, Kunming 650201, China; 2. College ofCivil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, China; 3. Colege of Civil and Trans.portation Engineering, Hohai University, Nanjing 210098, China; 4 Center of Agricultural Education and Experiment, YunnanAgricultumal University,Kunming 650201.China
关键词:
红黏土;  三轴试验;  体变;  剪胀
Keywords:
red cohesive soil;  triaxia test;  volumetric deformation: dilatation
分类号:
TU446
DOI:
10.3969/j.issn.1671-6833.2012.05.012
摘要:
非饱和土中吸力的测量比较困难,选择饱和度作为参数在非饱和土研究中具有重要的实用价值.在改进的常规三仪上对不同干密度、不同饱和度的云南红黏土试样进行不排气不排水三轴试验,试验过程中试样出现了明显的剪胀现象.当试样干密度较大时,即使饱和度较大也出现了剪胀；而当试验干密度较小时,在饱和度较大时剪胀消失.通过微观机理可以很好地解释这种剪胀现象,剪胀主要由于试验过程中孔隙气压力所造成颗粒间力矩不平衡引起的,而当干密度较小、饱和度较大时,孔隙气在围压作用下会溶于水,这种颗粒间的不平衡力矩消失,剪胀现象也随之消失了.
Abstract:
lt is diffeult to measure matric suclion in unsaturated soil, Using saturation as a parameter is valua.ble for unsaturated soil research. A series of improved triaxial compression tests were performed on Yunnan redcohesive soil with different initial saturation degrees and different dry bulk densities. The dilatation occurredfrequently during the tests. When the soil dry bulk density was high, the dilatation of samples with high satu.ration degrees also occurred. The dilatation disappeared when soil dry bulk density was small and saturationdegree was high. The dilatation can be well explained through microscopic mechanism. The dilatation wascaused by lopsided moment and the lopsided moment was caused by pore air pressure. When the soil sampleswith high saturation degrees had small dry bulk densities, the pore air dissolved in the water and the dilatationdisappeared.
更新日期/Last Update: 1900-01-01