压汞试验技术研究黏性土微观孔隙分布特性
|
摘要
土体的微观结构对土的物理力学特性具有决定性影响,研究土体微观结构有重要的科学意义.取武汉市汉街地区一处建筑工地基坑底部的非饱和粘土,风干后制得干密度为1.4g/cm3的重塑土试样,运用压汞试验方法研究试样微观孔隙结构的孔径分布变化规律.研究表明,该地区非饱和粘土孔隙主要以大孔为主,大多分布在8.75～62.5μm之间.通过试验还发现进汞曲线和出汞曲线的不一致性,并分析了产生此结果的原因.
The soil microstructure has a significant influence on the mechanical behavior of soil,and researching on soil microstructure is important.Take some unsaturated clay of the foundation,at a construction site of Han Street in Wuhan,The dry density of the remodeling clay was controlled over 1.4g/cm3,after the air drying.By means of mercury intrusion test,the study researched the shifty rule of the pore distribution in terms of microstructure.The result shows that the pore size distribution is dominant for big pore size,with the main size distribution varying from 8.75μm to 62.5μm.Through the test,the result also shows that the intrusive mercury curve and the extrusive mercury curve is inconsistent.The reason was also analysed.
The soil microstructure has a significant influence on the mechanical behavior of soil,and researching on soil microstructure is important.Take some unsaturated clay of the foundation,at a construction site of Han Street in Wuhan,The dry density of the remodeling clay was controlled over 1.4g/cm3,after the air drying.By means of mercury intrusion test,the study researched the shifty rule of the pore distribution in terms of microstructure.The result shows that the pore size distribution is dominant for big pore size,with the main size distribution varying from 8.75μm to 62.5μm.Through the test,the result also shows that the intrusive mercury curve and the extrusive mercury curve is inconsistent.The reason was also analysed.
引文
[1]陶高梁.岩土多孔介质孔隙结构的分形研究及其应用[D].武汉:武汉理工大学图书馆,2010.
[2]邓津,王兰民,张振中,等.甘肃永登湿陷性新近堆积黄土的微观结构分析[J].西北地震学报,2005,27(3):267-271.
[3]单红仙,刘媛媛,贾永刚,等.水动力作用对黄河水下三角洲粉质土微结构改造研究[J].岩土工程学报,2004,26(5):654-658.
[4]陈嘉鸥,叶斌,郭素杰.珠江三角洲黏性土微结构与工程性质初探[J].岩石力学与工程学报,2000,19(5):674-678.
[5]吕海波,赵艳林,孔令伟.软土结构性破损的孔隙分布试验研究[J].岩土力学,2003,24(4):573-578.
[6]许勇,张季超,李伍平.饱和软土微结构分形特征的试验研究[J].岩土力学,2007,28(增):49-52.
[7]陶高梁,张季如,黄丽,等.多孔材料孔隙特性的分形描述[J].建筑材料学报,2010,13(5):678-681.
[8]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.
[2]邓津,王兰民,张振中,等.甘肃永登湿陷性新近堆积黄土的微观结构分析[J].西北地震学报,2005,27(3):267-271.
[3]单红仙,刘媛媛,贾永刚,等.水动力作用对黄河水下三角洲粉质土微结构改造研究[J].岩土工程学报,2004,26(5):654-658.
[4]陈嘉鸥,叶斌,郭素杰.珠江三角洲黏性土微结构与工程性质初探[J].岩石力学与工程学报,2000,19(5):674-678.
[5]吕海波,赵艳林,孔令伟.软土结构性破损的孔隙分布试验研究[J].岩土力学,2003,24(4):573-578.
[6]许勇,张季超,李伍平.饱和软土微结构分形特征的试验研究[J].岩土力学,2007,28(增):49-52.
[7]陶高梁,张季如,黄丽,等.多孔材料孔隙特性的分形描述[J].建筑材料学报,2010,13(5):678-681.
[8]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心