河北山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 the Roadbed Soil on Mountain Zone of Hebei Province

作　　者：付旭 李茜 周慧文 刘晓立 王大光 FU Xu;LI Qian;ZHOU Hui-wen;LIU Xiao-li;WANG Da-guang(College of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]北华航天工业学院建筑工程学院,河北廊坊065000

出　　处：《工程建设与设计》2023年第13期41-44,共4页Construction & Design for Engineering

基　　金：河北省教育厅科学技术研究项目资助(QN2017003);河北省建设科技研究指导性计划项目(20182051);廊坊市科技技术研究与发展计划自筹经费项目(2020011053;2021011049)。

摘　　要：河北山区路基土的工程特性研究对保障该地区公路路基的安全性和稳定性具有重要意义。以河北京化高速KC-3(张家口)段路基土为研究对象,采用统计分析方法对河北山区路基土的10种物理力学指标进行了统计规律研究。结果表明:(1)张家口地区路基土的压缩系数的变异系数最大,应作为随机变量来处理,比重的变异系数最小,小于0.1,可以视为常量;(2)压缩系数与这些物理指标的相关系数均小于0.5,并与其他指标呈线性正相关;(3)含水率、湿密度、饱和度概率分布模型为正态分布模型,其余物理力学指标为对数正态分布模型。The study ofengineering characteristics ofroadbed soil in hebei mountainous area is of great significance to the safety and stability of roadbed in this area.Based on the investigation data ofKC-3(Zhangjiakou)section of Jinghua Expressway,the variation,correlation and probability distribution characteristics of 10 physical and mechanical indexes of subgrade soil in Hebei mountainous area were analyzed by using statistical analysis method.The results show that:(1)The coefficient of variation ofcompressibility of subgrade soil in Zhangjiakou area is the largest,which should be treated as a random variable.The coefficient of variation of specific gravity is the smallest,less than O.1,which can beregarded as a constant;(2)The correlation coefficients ofcompressibility coefficient ai-2 with these physical indexes are all less than 0.5,and show positive linear correlation with other indexes;(3)The probability distribution models of water content w,wet density r and saturation S were normal distribution models,and the other physical and mechanical indexes were lognormal distribution models.

关 键 词：山区 物理力学指标 变异性 相关性 概率分布 

分 类 号：TU41[建筑科学—岩土工程] U416.1[建筑科学—土工工程]