桂林红黏土土质学特征试验研究  

Experimental Study on Soil Tectonics Characteristics of Red Clay in Guilin

作　　者：陈学军[1,2] 高利[1,2] 宋宇[1,2] 余意[1,2] 

机构地区：[1]广西岩土力学与工程重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《路基工程》2015年第4期72-75,共4页Subgrade Engineering

基　　金：国家自然科学基金:采矿振动扰动下岩溶塌陷的动力学机制(41262011);国家自然科学基金:季节性地下水变化作用红黏土路基沉降机理及时空演化规律(51369010);广西重点实验室项目:强降雨条件下广西红粘土山体滑坡临滑机理及监控研究(1-cx-01);广西重点实验室项目(11-k5-02);广西重点实验室项目(12-A-01-02)

摘　　要：以桂林市临桂县临桂镇蔚蓝星城一期工程场地的红黏土为例,采用X衍射试验、电镜扫描试验,分析了桂林红黏土的土质学特征。从微观角度分析了桂林红黏土具有孔隙比、剪切强度较大,压缩性、密实度较小,塑性较高的原因。在工程实践中,可以通过施加外部荷载,改变红黏土的颗粒排列组合,从而提高红黏土的密实度和承载力。Taking the red clay at the site of Weilan Xingcheng project （ Phase I ） in Lingui Town, Lingui County, Guilin City as an example, this paper by means of X-ray diffraction and electron microscope scanning analyzed the red clay＇s tectonics characteristics and, from the microscopic view, discussed why the red clay has large void ratio and shear strength, small compressibility and density, and high plasticity. In engineering practice, it is possible to change permutation and combination of the red clay particles by applying external load and thereby improve compactness and bearing capacity of the red clay.

关 键 词：桂林 红黏土 X衍射 电镜扫描 土质学特征 力学特征 

分 类 号：TU446[建筑科学—岩土工程]