水化学环境对天然土流变特性的影响  

Impact of Hydrochemical Environment on Rheological Characteristics of Natural Soil

作　　者：何佳璐 陈盼[4] 马田田[4] 郝丰富 HE Jialu;CHEN Pan;MA Tiantian;HAO Fengfu(School of Civil Engineering and Architecture,Guilin University of Technology,Guilin Guangxi 541004;Guangxi Key Laboratory of Geotechnical Mechanics and Engineering,Guilin University of Technology,Guilin Guangxi 541004;Engineering College,Guangzhou College of Technology and Business,Guangzhou Guangdong 510850;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan Hubei 430071)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004 [3]广州工商学院工学院,广东广州510850 [4]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《湖北理工学院学报》2023年第6期14-17,68,共5页Journal of Hubei Polytechnic University

基　　金：国家自然科学基金项目(项目编号:51939011)。

摘　　要：选用龙胜粘土、滨海软粘土及三门峡粘土3种天然土开展了不同土颗粒质量分数、温度和盐溶液浓度作用下天然土流变特性规律的试验研究。研究表明:屈服应力随土颗粒质量分数增大而迅速增大,随温度升高而增大;盐浓度增大,龙胜粘土的屈服应力增大,滨海软粘土和三门峡粘土的屈服应力减小。分析发现,质量分数决定了土颗粒的接触态和非接触态,控制盐溶液浓度的影响机制是不同的,因而在研究盐溶液浓度对流变性质的影响时需考虑土颗粒的接触状态。Three kinds of natural soils such as Longsheng clay,Binhai soft clay and Sanmenxia clay,were selected to carry out the experimental research on the rheological characteristics of natural soils under the effect of different mass fractions of soil particles,temperature and salt solution concentration.Research showed that the yield stress rapidly increased with the increase of soil particle mass fraction and temperature.As the salt concentration increased,the yield stress of Longsheng clay increased,while the yield stress of coastal soft clay and Sanmenxia clay decreased.It was found that the mass fraction determined the contact and non-contact states of the soil particles,and the mechanism of controlling the effect of salt solution concentration was different,thus the contact state of the soil particles should be taken into account when investigating the effect of salt solution concentration on the rheological properties.

关 键 词：天然土 流变 屈服应力 温度 盐溶液 

分 类 号：TU447[建筑科学—岩土工程] P744[建筑科学—土工工程]