多元逐步回归分析应用于固化土强度与微结构参数相关性评价  

Multivariate stepwise regression method use in correlation analysis of microstructure indices and strength of solidified soil

作　　者：王志强[1] 柴寿喜[2] 仲晓梅[2] 郭英 王晓燕[4] 魏丽[2] 

机构地区：[1]兰州大学土木工程与力学学院,兰州730000 [2]天津城市建设学院土木工程系,天津300384 [3]中铁十二局集团第三工程公司,太原030024 [4]中水北方勘测设计研究有限责任公司勘察院,天津300222

出　　处：《岩土力学》2007年第8期1650-1654,共5页Rock and Soil Mechanics

基　　金：天津市自然科学基金课题(No.05YFSYSF00300;No.07JCYBJC12900);天津市高等学校科技发展基金课题(No.20051404);建设部研究开发项目(No.06-K1-5)

摘　　要：用石灰固化不同含盐量的滨海盐渍土,固化后土微结构参数发生了变化,力学强度大幅度提高。多元逐步回归分析计算结果表明二者之间存在着良好的相关关系,颗粒粒度分维、颗粒定向分维、等效直径、扁圆度和面积比是对固化土力学强度影响较为显著的5个微结构参数。借助土微结构参数与强度间的相关性计算分析,从另外一个角度验证石灰对滨海盐渍土的固土作用。Solidifying saline soil in inshore with different quantities of salt using lime, which causes the microstructure indices and strength of saline soil change obviously and increase greatly. It has been proved that strength has good correlation with microstructure indices with the help of multivariate stepwise regression method; and the five indices, including particle granularity fractal, particle orientation fractal, particle diameter, particle oblate degree, and particle area ratio, are the significant indices effected on the strength of solidified saline soil in inshore with lime. According to calculation results of microstructure indices, its fractal, and strength, solidifying mechanism of lime-saline soil can be certified from another aspect.

关 键 词：滨海盐渍土 土微结构参数 多元逐步回归分析 无侧限抗压强度 抗剪强度 固化土 

分 类 号：TU442[建筑科学—岩土工程]