基于湿陷性和震陷性的黄土微结构
|
摘要
试验通过对原状及湿陷和震陷土样的微结构SEM图像的观测和分析,定量研究力和水两个外因作用下黄土的孔隙大小、数量及其分布规律的变化,通过不同外因的作用效果分析黄土结构特性.结果表明黄土震陷后孔隙较湿陷后大,认为胶结作用极易因浸水而软化破坏,胶结作用愈强,黄土发生湿陷的可能性愈大;但是胶结作用可以抵御外力作用,使黄土不容易因震陷而破坏.
Observation and analysis of the SEM images of soil microstructure of samples were made after the collapsing or post-seismic subsidence,and a primary sampling were also done.The change of loess pore in size,number and distribution under force or water was quantitatively studied.The loess structural behavior was confirmed through the change of microstructure under different forces.It appeared that the pores of the sampled post-seismic subsidence were larger than pores of the sampling after collapsing.It was assumed that cementation was easily dissolved in water,and the stronger the cementation,the more possible it was for collapsing to occur.Cementation could prevent loess from being damaged by a force without water,such as an earthquake.
Observation and analysis of the SEM images of soil microstructure of samples were made after the collapsing or post-seismic subsidence,and a primary sampling were also done.The change of loess pore in size,number and distribution under force or water was quantitatively studied.The loess structural behavior was confirmed through the change of microstructure under different forces.It appeared that the pores of the sampled post-seismic subsidence were larger than pores of the sampling after collapsing.It was assumed that cementation was easily dissolved in water,and the stronger the cementation,the more possible it was for collapsing to occur.Cementation could prevent loess from being damaged by a force without water,such as an earthquake.
引文
[1]张宗祜.我国黄土类土显微结构的研究[J].地质学报,1964,44(3):357-370.
[2]高国瑞.兰州黄土显微结构和湿陷机理的探讨[J].兰州大学学报:自然科学版,1979,15(2):123-134.
[3]高国瑞.黄土湿陷变形的结构理论[J].岩土工程学报,1990,12(4):1-10.
[4]胡瑞林,官国琳,李向全,等.黄土湿陷性的微结构效应[J].工程地质学报,1999,7(2):161-167.
[5]石玉成,李兰,刘红玫.黄土的震陷性与其微结构特征的关系研究[J].西北地震学报,2002,24(2):129-134.
[6]雷胜友.黄土在受力和湿陷过程中微结构变化的CT扫描分析[J].岩土力学与工程学报,2004,23(24):4166-4169.
[7]裘国荣,石玉成,刘红玫.黄土震陷时微观结构随动应力变化分析[J].西北地震学报,2010,32(1):42-46.
[8]张礼中,胡瑞林,李向全,等.土体微观结构定量分析系统及应用[J].地质科技情报,2008,27(1):108-112.
[9]雷祥义.中国黄土的孔隙类型与湿陷性[J].中国科学B辑:化学、生物学、农学、医学、地学,1987(12):1309-1316.
[10]张振中,段汝文.黄土震陷研究与震害预测[J].西北地震学报,1987,9(增刊):63-69.
[11]高国瑞.黄土显微结构分类与湿陷性[J].中国科学A辑:数学,1980(12):1203-1208.
[12]中华人民共和国建设部.湿陷性黄土地区建筑规范(GB50025-2004)[S].北京:中国建筑工业出版社,2004:18-19.
[13]Bagi K.An algorithm to generate random dense arrangements for discrete element simulations of granular assemblies[J].Granular Matter,2005,7(1):31-43.
[14]Cho G C,Dodds J,Santamarina J C.Parti-cle shape effects on packing density,stiffness and strength:natural and crushed sands[J].Journal of Geotechnical and Geoenvironmental Engineering,2006,132(5):591-602.
[15]Santamarina J C,Cho G C.Soil behavior:the role of particle shape[C]//Jardine R J,Potts D M,Higgins K G.Advances in Geotechnical Engineering:the Skempton Conference.London:Thomas Telford,2004:604-617.
[16]胡瑞林,李向全,官国琳,等.粘性土微结构定量模型及其工程地质特征[M].北京:地质出版社,1995:15-20.
[17]沙爱民,陈开圣.压实黄土的湿陷性与微观结构的关系[J].长安大学学报:自然科学版,2006,26(4):1-4.
[18]顾成权,孙艳.土体内聚力随含水量、粘粒含量及干密度变化关系探讨[J].水文地质工程地质,2005,32(1):34-36.
[2]高国瑞.兰州黄土显微结构和湿陷机理的探讨[J].兰州大学学报:自然科学版,1979,15(2):123-134.
[3]高国瑞.黄土湿陷变形的结构理论[J].岩土工程学报,1990,12(4):1-10.
[4]胡瑞林,官国琳,李向全,等.黄土湿陷性的微结构效应[J].工程地质学报,1999,7(2):161-167.
[5]石玉成,李兰,刘红玫.黄土的震陷性与其微结构特征的关系研究[J].西北地震学报,2002,24(2):129-134.
[6]雷胜友.黄土在受力和湿陷过程中微结构变化的CT扫描分析[J].岩土力学与工程学报,2004,23(24):4166-4169.
[7]裘国荣,石玉成,刘红玫.黄土震陷时微观结构随动应力变化分析[J].西北地震学报,2010,32(1):42-46.
[8]张礼中,胡瑞林,李向全,等.土体微观结构定量分析系统及应用[J].地质科技情报,2008,27(1):108-112.
[9]雷祥义.中国黄土的孔隙类型与湿陷性[J].中国科学B辑:化学、生物学、农学、医学、地学,1987(12):1309-1316.
[10]张振中,段汝文.黄土震陷研究与震害预测[J].西北地震学报,1987,9(增刊):63-69.
[11]高国瑞.黄土显微结构分类与湿陷性[J].中国科学A辑:数学,1980(12):1203-1208.
[12]中华人民共和国建设部.湿陷性黄土地区建筑规范(GB50025-2004)[S].北京:中国建筑工业出版社,2004:18-19.
[13]Bagi K.An algorithm to generate random dense arrangements for discrete element simulations of granular assemblies[J].Granular Matter,2005,7(1):31-43.
[14]Cho G C,Dodds J,Santamarina J C.Parti-cle shape effects on packing density,stiffness and strength:natural and crushed sands[J].Journal of Geotechnical and Geoenvironmental Engineering,2006,132(5):591-602.
[15]Santamarina J C,Cho G C.Soil behavior:the role of particle shape[C]//Jardine R J,Potts D M,Higgins K G.Advances in Geotechnical Engineering:the Skempton Conference.London:Thomas Telford,2004:604-617.
[16]胡瑞林,李向全,官国琳,等.粘性土微结构定量模型及其工程地质特征[M].北京:地质出版社,1995:15-20.
[17]沙爱民,陈开圣.压实黄土的湿陷性与微观结构的关系[J].长安大学学报:自然科学版,2006,26(4):1-4.
[18]顾成权,孙艳.土体内聚力随含水量、粘粒含量及干密度变化关系探讨[J].水文地质工程地质,2005,32(1):34-36.
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