摘要
以牡丹江市主城区已有土工测试数据为基础,利用相关关系和统计回归的方法,对研究区内粉质黏土物理力学指标及相互间存在的关系进行了分析研究,建立了回归方程,为本区岩土勘察工作提供了参考。研究结果表明:①牡丹江主城区大部分粉质黏土含水量较高,呈可塑状态,一般具有中等压缩性和较高抗剪强度。天然密度(ρ)、密度(G_(s))、液限(w_(L))、塑限(w_(P))等指标的变异系数均较小,可作为常量指标,压缩指标(a_(1-2)和E_(s1-2))和抗剪指标(c和φ)变异系数均较大,应作为变量指标;②含水量(w)与天然密度(ρ)、液限(w_(L))、塑限(w_(P))、孔隙比(e)、液性指数(I_(L)),液限(w_(L))与塑限(w_(P)),孔隙比(e)与液性指数(I_(L))均具有较好的线性关系;③压缩模量(E_(s1-2))和压缩系数(a_(1-2))与含水量(w)、孔隙比(e)、液性指数(I_(L)),黏聚力(c)与含水量(w)、液性指数(I_(L))均具有良好的线性关系。
Based on the existing geotechnical test data in the main urban area of Mudanjiang City,the physical and mechanical indexes of silty clay and the relationship between them in the study area are analyzed and studied by the methods of correlation and statistical regression.The regression equation is established.It provides a reference for geotechnical investigation in this area.The study result is shown as follows.(1)Most of the silty clay in the main urban area of Mudanjiang River has high water content,in a plastic state,and generally has medium compressibility and high shear strength.The variation coefficients of natural density(ρ),specific gravity(G_(s)),liquid limit(w_(L))and plastic limit(w_(P))are relatively small,which can be used as constant indexes.The variation coefficients of compression index(a_(1-2)&E_(s1-2))and shear index(c&φ)are relatively large,which should be used as variable indexes.(2)There is a good linear relationship between water content(w)and natural density(ρ),liquid limit(w_(L)),plastic limit(w_(P)),void ratio(e),liquid index(I_(L)),liquid limit(w_(L))and plastic limit(w_(P)),void ratio(e)and liquid index(I_(L)).(3)The compression modulus(E_(s1-2))and coefficient(a_(1-2))have good linear relationship with water content(w),void ratio(e)and liquid index(I_(L)),and the cohesion(c)has good linear relationship with water content(w)and liquid index(I_(L)).
作者
王建伟
佟智强
刘浩
高博
宋林旭
王忠禹
WANG Jianwei;TONG Zhiqiang;LIU Hao;GAO Bo;SONG Linxu;WANG Zhongyu(Mudanjiang Natural Resources Survey Center,China Geological Survey,Mudanjiang 157021,Heilongjiang,China)
出处
《矿产与地质》
2022年第6期1243-1248,共6页
Mineral Resources and Geology
基金
中国地质调查局“牡丹江市多要素城市地质调查”(DD20191021)项目资助。
关键词
粉质黏土
物理力学指标
相关性
回归分析
牡丹江市
silty clay
physical and mechanical index
correlation
regression analysis
Mudanjiang City
