摘要
为分析昆明市某场地泥炭质土物理力学指标的统计规律,以该场地岩土勘察钻孔的50组泥炭质土勘测数据为研究对象,基于统计分析原理,运用统计分析软件,分析了11个指标的最大值、最小值、均值、中位数、标准差、变异系数,总结了研究区泥炭质土的物理力学特性,通过各指标间的散点图拟合了部分经验公式。结果表明:研究区泥炭质土有机物含量、天然含水率、压缩性高,孔隙比大,天然重度、土粒比重小;泥炭质土所统计指标之间相关性较好;泥炭质土的压缩系数、孔隙比与含水率呈线性正相关,重度与含水率呈对数关系,随含水率增加重度逐渐减小后趋于稳定,饱和度与含水率呈线性负相关;泥炭质土的含水率、孔隙比、压缩系数随泥炭质土埋深逐渐减小后趋于稳定,三个指标随埋深的变化规律相似,泥炭质土的重度、饱和度与埋深线性正相关;泥炭质土含水率、孔隙比与有机物含量呈线性正相关,饱和度、颗粒比重与有机物含量呈负相关。研究结果可为昆明市泥炭质土场地的岩土工程设计提供基础依据。
In order to analyze the statistical law of the physical and mechanical indexes of peat soil in a site in Kunming,50 sets of peat soil survey data from the geotechnical survey boreholes in the site were taken as the research object.Based on the principle of statistical analysis,the maximum,minimum,mean,median,standard deviation and coefficient of variation of 11 indexes were analyzed by using statistical analysis software.The physical and mechanical properties of the peat soil in the study area were summarized,and some empirical formulas were fitted through the scatter plot among the indicators.The results show that the organic matter content,natural moisture content and compressibility of peat soil in the study area are high,the void ratio is large,the natural weight and the specific gravity of soil particles are small;the correlation between statistical indicators of peat soil is good;a linear positive correlation is found between the compressibility coefficient and void ratio of peat soil and its water content,and a logarithmic relationship between the severity and the water content,in which the severity gradually decreases and then tends to be stable with the increase of the water content;the saturation has a linear negative correlation with the water content.The coefficient gradually decreases with the increase of the burial depth of peat soil and then tends to be stable,which shows a similar variation pattern as the burial depth.The peat soil weight and saturation are linearly positively correlated with the burial depth.The moisture content and void ratio of peat soil were positively correlated with organic matter content,and saturation and particle proportion were negatively correlated with organic matter content.The research results can provide a basis for the geotechnical engineering design of Kunming peat soil site.
作者
程豪
田林
CHENG Hao;TIAN Lin(School of Architectural Engineering,Kunming University of Science and Technology,Kunming,650500,China)
出处
《贵州大学学报（自然科学版）》
2022年第4期92-98,共7页
Journal of Guizhou University:Natural Sciences
基金
云南省科技计划资助项目(2016FD032)。
关键词
泥炭质土
力学性质
埋深
有机质
相关性分析
peat soil
mechanical properties
burial depth
organic matter
correlation analysis
