基于粒度熵理论的冻土区路基填料冻胀敏感性分析  

A method for frost susceptibility analysis of roadbed fills in frozen soil area based on grading entropy

作　　者：潘翠柳 Pan Cuiliu(Qinghai Communication Holding Construction Engineering Group Co.,Ltd.,Xining 810000,China)

机构地区：[1]青海省交控建设工程集团有限公司,西宁810000

出　　处：《青海交通科技》2023年第6期64-70,共7页Qinghai Transportation Science and Technology

基　　金：青海省科技计划项目(2023—SF—125)。

摘　　要：利用232组试验数据,运用粒度熵理论定量描述土体的颗粒含量变化规律,研究土质、细颗粒含量、颗粒特征参数、压实度、初始含水率、试样尺寸与冻胀率的关系。结果表明:细颗粒含量是影响冻胀率的重要因素,其次是含水率。粒度熵参数能够很好地描述不同路基填料的冻胀率变化特征,标准基础熵与冻胀率存在较为明显的线性关系,为寒区建设工程的地基和基础稳定性研究提供参考。In order to appropriately represent the frost heave sensitivity of roadbed fill in cold regions,232 sets of experimental data were collected in this paper.The grading entropy theory was utilized to quantitatively describe the change rule of particle content of the soil.The relationship between soil type,fine particle content,particle characteristic parameters,compaction,initial water content,specimen size and freezing expansion rate was investigated by Mantel test analysis method.The results show that the fine particle content is an important factor affecting the freezing expansion rate,followed by the water content.The grading entropy parameter can better describe the change of freezing rate of different roadbed fillers,and there is a more obvious linear relationship between A and freezing rate.The research results can provide a reference for the foundation and foundation stability study of construction projects in cold regions.

关 键 词：冻胀敏感性 颗粒级配 细颗粒含量 粒度熵 Mantel检验 

分 类 号：U416.1[交通运输工程—道路与铁道工程]