河北滨海区路基土的物理力学指标统计关系研究  

Statistical Study of Physical and Mechanical Parameters of Subgrade Soils in Coastal Hebei Province

作　　者：李茜[1] 付旭[1] 刘晓立[1] 周慧文[1] 王大光[1] LI Qian;FU Xu;LIU Xiaoli;ZHOU Huiwen;WANG Daguang(Disciplinary Inspection Office,Department of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang,065000)

机构地区：[1]北华航天工业学院纪检监察审计室建筑工程系

出　　处：《土工基础》2018年第6期587-589,610,共4页Soil Engineering and Foundation

基　　金：河北省高等学校科学技术研究项目(QN2017003);河北省高等教育教学改革研究与实践项目(2017GJJG198)

摘　　要：基于河北沿海高速岐口至海丰段的勘察成果,采用数理统计分析方法对河北滨海区路基土的物理力学指标变异性、相关性和概率分布特征进行统计分析。结果表明:(1)河北滨海区路基土的比重、湿密度和饱和度的变异系数较小,在工程设计中可以将这三个物理指标看作常数;(2)压缩系数a1-2~含水量w、压缩系数a1-2~湿密度ρ、压缩系数a1-2~孔隙比e之间的拟合关系式具有较高的相关系数;压缩系数a1-2~湿密度ρ之间符合负相关性规律,而与其它指标之间为呈正相关性;(3)含水量、孔隙比、液限这三种指标符合对数正态分布,其余指标符合正态分布。研究成果为河北滨海地区土工参数的取值和工程设计提供了参考和依据。The geotechnical investigation results of subgrade soils in coastal area expressway between Chikou and Haifeng are statistically analyzed.The variation,correlation and probability properties between the physically indices and the mechanical properties are evaluated.The following conclusions are observed:1)variations of specific gravity,unit weight,and degree of saturation of subgrade soils in coastal Hebeiare very small.These parameters can be treated as constant in the engineering applications;2)high correlations can be found in following:Compression coefficient and moisture content;compression coefficient and unit weight;compression coefficient and void ratio.Among these parameters,the compression coefficient and unit weight have negative relations,whereas,other pairs are positive correlated.3)the probability distribution of moisture content,void ratio,and liquid limit have a logarithmic normal distribution and other indices have normal distribution.

关 键 词：滨海区 物理力学指标 变异性 相关性 概率分布 

分 类 号：TU411[建筑科学—岩土工程]