摘要
以赣南红土为研究对象,运用直剪试验和库伦强度理论,试验研究了含水量、粒径和颗粒级配对红土强度特性的影响。研究结果表明:粒径为0~0.5 mm时,随着粒径增大,颗粒形成的团聚体稳定性增强,红土液限和塑限快速减小;粒径为0.5~2 mm时,随着粒径增大,团聚体稳定性略有减弱,红土液限和塑限缓慢减小并趋于稳定;当含水率为18%,红土黏聚力达到最大值;颗粒级配对红土强度参数影响非常大,当法向应力不超过200 kPa时,红土抗剪强度主要受细颗粒含量的影响,而大于300 kPa时则主要受粗颗粒含量影响。
The effects of water content,particle size and particle size distribution on the strength properties of red soil were studied based on the direct shear test and Mohr-Coulomb strength theory.The results show that the stability of aggregates formed by particles increases,the liquid limit and plastic limit of red soil decrease rapidly,with increasing particle size when the range of particle size is 0~0.5 mm.The stability of aggregates decreases slightly,the liquid limit and plastic limit of red soil decrease slowly and tend to be stable,with the increase of particle size when particle size is 0.5~2 mm.The cohesion of red clay reaches the maximum when the moisture content is 18%.The particle size distribution has a great influence on the strength parameters of red clay.When the normal stress is less than 200 kPa,the shear strength of red soil is mainly affected by the content of fine particles,and when the normal stress exceeds 300 kPa,the shear strength of red soil is mainly affected by the content of coarse particles.
作者
胡世丽
蒋冰
HU Shili;JIANG Bing(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Jiangxi Key Laboratory of Environmental Geotechnical and Engineering Disaster Control,Ganzhou 341000,Jiangxi,China)
出处
《江西理工大学学报》
CAS
2021年第1期1-6,共6页
Journal of Jiangxi University of Science and Technology
基金
国家自然科学基金青年基金项目(41602311)
江西省自然科学基金资助项目(20192BAB206048)
江西省学位与研究生教育教学改革研究项目(JXYJG-2019-140)。
关键词
红土
抗剪强度
含水量
颗粒级配
red soil
shear strength
water content
particle size distribution
