干旱区生态环境知识资源中心(Arid): 不同气候环境下黄土胶结性状的试验研究

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	不同气候环境下黄土胶结性状的试验研究
其他题名	Experimental Investigation of Cementing Property in Loess under Different Climate Environment Conditions
	崔强; 段辉顺; 毛矛; 张振华; 陈爽
来源期刊	地下空间与工程学报
ISSN	1673-0836
出版年	2019
卷号	15 期号:1 页码:52-59
中文摘要	黄土作为一种常见的非饱和土天然地基,由于其特殊的胶结结构,往往较常规粉土或粉质粘土的粘聚强度高。为了研究黄土胶结物赋存状态和组成类型及气候环境对其的影响,本文选取我国甘肃、陕西两省5处黄土作为研究对象,采用全分散法和半分散法对每种试样进行溶解处理,对处理后的土悬液进行粒集形态和粒径分析。试验结果表明:经半分散法处理后的土悬液上层水体清澈,灰色碎屑颗粒沉淀在容器底层,分层明显;经全分散法处理后的土悬液由于试验过程中破坏了土颗粒中的内、外胶结单元,呈现出明显的溶胶状态,分层不明显;在全分散法处理后的土悬液中提纯出粒径小于0.005 mm的黏粒,分别对其进行矿物组成、碳酸钙、易溶盐、离子交换量等进行测试。分析表明:处于干燥干旱地区的ZY、DX、GG黄土,胶结物以黏土矿物和微晶碳酸钙组成为主,处于湿润多雨的QZ、WG黄土,胶结物以黏土矿物为主,并且五处黄土的胶结能力自西向东依次增强。
英文摘要	As a kind of common natural foundation,the shear strength of the loess will be higher than other silt or silt clay owe to its especial cementing structure. In order to investigate the cementing property between soil particles in loess,five loess samples located in Gansu and Shanxi Provinces were collected in site,and dissolved respectively using total dispersion method and semi dispersion method,and the granular set state and particle size of the loess suspension were tested. The analysis results show that the solutions processed using semi dispersion method are clear and appear obvious stratification,and then the solutions treated using total dispersion method are turbid,and present the colloidal state. The main reason for the above phenomenon is that both the internal cement and the external cement existed in loess particles are destroyed in the process of dissolution using total dispersion method,and the fine grain matters go into the solutions by solute transport. The contents of composition minerals,CaCO_3,soluble salts and the ion exchange capacity of the clay particles ( particle size less 0.005mm) in loess were tested simultaneously,and the conclusions drawn are that the cements existed in loess particles located in the arid area such as ZY,DX,and GG are composed of the clay minerals and CaCO_3,nevertheless,of which located in the wet and rainy area such as QZ,WG are only composed of the clay minerals. In addition,the cementation ability is enhanced in turn from the West to the East in China.
中文关键词	黄土 ; 胶结特性 ; 气候环境 ; 黏土矿物 ; 碳酸钙 ; 离子交换量
英文关键词	loess cementing property climate environment clay mineral CaCO_3 ion exchange capacity
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Construction & Building Technology
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:6446688
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239031
作者单位	崔强, 中国电力科学研究院有限公司, 北京 102401, 中国.; 段辉顺, 中国能源建设集团公司甘肃省电力设计院有限公司, 兰州, 甘肃 741000, 中国.; 毛矛, 中国能源建设集团公司甘肃省电力设计院有限公司, 兰州, 甘肃 741000, 中国.; 张振华, 合肥工业大学土木水利工程学院, 合肥, 安徽 230009, 中国.; 陈爽, 合肥工业大学土木水利工程学院, 合肥, 安徽 230009, 中国.
推荐引用方式 GB/T 7714	崔强,段辉顺,毛矛,等. 不同气候环境下黄土胶结性状的试验研究[J],2019,15(1):52-59.
APA	崔强,段辉顺,毛矛,张振华,&陈爽.(2019).不同气候环境下黄土胶结性状的试验研究.地下空间与工程学报,15(1),52-59.
MLA	崔强,et al."不同气候环境下黄土胶结性状的试验研究".地下空间与工程学报 15.1(2019):52-59.