摘要
从土体内部结构形态角度分析了粘性土压缩性影响因素。通过微细结构光学测试系统拍摄了七组压缩性不同的粘性土的微细结构图片，并提取相应的微结构量化参数；运用多元线性回归法对粘性土的压缩系数和各微结构量化参数进行关联性分析，从而确定了各微结构要素对粘性土压缩性影响的大小。研究表明：粘性土的压缩性与颗粒的形态、分布及排列、孔隙的分布情况密切相关；一般来说，颗粒的分布分维、定向度、圆度越小，土体的压缩性就越低，抗压性能就越好。
The influential factors of cohesive soil＇s compressibility are analyzed from the angle of its interior structure The micro-structural images of seven samples with different compressibility are taken by using an image processing system and the quantized micro-structural parameters are extracted; The correlations between compressibility coefficient and every micro-structural parameters are analyzed by using multi-linear regression method to determine how large every micro-structural element works on the cohesive soil＇s compressibility. The results show that the compressibility of cohesive soils is closely related to the grain morphology, granulometric distribution, grain packing and pore distribution. Generally, the smaller the distributing fractal dimension, directional entropy and circularity of particles are, the lower the compressibility and the higher the compressive strength of the soil mass will be.
出处
《中国港湾建设》
北大核心
2006年第5期16-18,32,共4页
China Harbour Engineering
基金
国家自然科学基金（50279008,40374047）
关键词
粘性土
微结构
量化参数
压缩系数
关联性分析
cohesive soil
microstructure
quantizedparameters
compressibility coefficient
relevancy analysis
