不同击实功下贺州大理石废粉持水特性研究  

Water Retention Characteristics of Marble Waste Powder in Hezhou under Different Compactive Work

作　　者：刘俊祺 周佳翔 赵雯笛 LIU Junqi;ZHOU Jiaxiang;ZHAO Wendi(School of Civil Engineering,Guilin University of Technology,Guangxi,Guilin 541004,China)

机构地区：[1]桂林理工大学土木工程学院,广西桂林541004

出　　处：《洛阳理工学院学报(自然科学版)》2025年第1期15-20,共6页Journal of Luoyang Institute of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(52268057).

摘　　要：为研究大理石废粉的土-水特征,通过对不同击实功下的大理石废粉进行滤纸法试验,测定土-水特征曲线,利用Van Genuchten模型进行拟合并分析拟合结果。使用CT扫描对不同击实功下的大理石废粉进行扫描,并利用Avizo软件进行分析。研究结果表明:Van Genuchten模型可以对大理石废粉的土-水特征曲线进行较好拟合,在土-水特征曲线的平缓阶段与下降阶段,干密度起到了一定的影响,而在残余阶段则对土-水特征曲线几乎无影响。影响土体吸力变化的主要因素是击实功增大使孔喉直径减小,土体吸力减弱。To study the soil-water characteristics of marble waste powder,this paper conducts filter paper tests on marble waste powder under different compactive work,determines the soil-water characteristic curves,fits them using the Van Genuchten model,and analyzes the fitting results.CT scans are used to scan marble waste powder under different compactive work,and the software Avizo is employed for analysis.The research results indicate that the Van Genuchten model can provide a good fit for the soil-water characteristic curves of marble waste powder.Dry density plays a certain role in the plateau and descending stages of the soil-water characteristic curve,but has almost no impact in subsequent stages.The main factor influencing the change in soil suction is the increase in compactive work leading to a reduction in pore throat diameter,resulting in a weakening of soil suction.

关 键 词：大理石废粉 土水特征曲线 CT扫描 持水特性 

分 类 号：U414[交通运输工程—道路与铁道工程]