期刊论文

Study on the influence of gravel content on the mechanical properties of crushed aggregates containing quartz and sandstone

中文

铁道科学与工程学报

1672-7029

2021

18

02

375-382

10.19713/j.cnki.43-1423/u.T20200331

湖南省教育厅项目（16C1380）； 水利部土石坝破坏机理与防控技术重点实验室开放基金资助项目（YK319008）；

本校为第一机构

为探究含石率对石英砂岩类碎石土力学特性的影响,以湖南益阳某滑坡石英砂岩类碎石土为研究对象,对24组碎石土试样在不同围压(100,200和300 kPa)下进行三轴力学试验。研究结果表明:10%~30%含石率碎石土的应力应变曲线与正常固结土的应力应变曲线不同,在较高围压下出现了应变软化现象。这表明碎石的加入,会改变原有正常固结土的受力特性。该类碎石土的黏聚力随含石率的增加基本呈下降趋势,但摩擦角的大小则随含石率的变化存在一定的波动,相对来说,中等含石率范围内的摩擦角相对最大。低围压下(100 kPa),该类碎石土抗剪强度随含石率的升高而降低,中高围压下(200 kPa和300 kPa),其抗剪强度随含石率的...

To explore the influence of stone content on the mechanical properties of quartz sandstone gravel soil,the landslide quartz sandstone gravel soil in Yiyang,Hunan Province was studied.The triaxial shear tests under different confining pressures (100,200 and 300 kPa) were carried out on 24 groups of gravel soil samples.The results show that:the stress-strain curve of the gravel soil with 10%~30% stone content is different from that of normally consolidated soil,and strain softening occurs under higher confining pressure.This indicates that the addition of gravel will change the mechanical charac...