泥石流体屈服应力与黏土矿物关系的试验研究

发布时间：2018-01-28 20:27

本文关键词： 泥石流屈服应力黏粒矿物固体体积浓度　出处：《科学技术与工程》2017年21期 　论文类型：期刊论文

【摘要】：泥石流体的屈服应力是泥石流体抗剪强度的一个重要指标,但到目前为止对泥石流体屈服应力和黏土矿物的关系研究还不完善。通过简易泥石流排导槽装置,选取蒙脱石、伊利石、绿泥石、高岭土4种常见的黏粒矿物为研究变量,以泥石流体屈服应力为研究目标,依次改变泥石流体中泥沙颗粒体积浓度、黏粒矿物成分及百分含量得出:(1)同等条件下,不同黏土成分对屈服应力的影响不同,蒙脱石影响最强,伊利石次之,绿泥石、高岭土最弱;(2)单一黏土矿物条件下,屈服应力与黏土矿物关系呈正向指数关系;(3)混合黏土矿物条件下,屈服应力与黏粒矿物的关系与单一黏土矿物条件下关系一致,但变化速率比单一黏土矿物小;(4)通过国内外学者资料验证本文泥石流屈服应力与黏土矿物的关系,具有一定的准确性和可用性。
[Abstract]:The yield stress of debris flow is an important index of shear strength of debris flow, but the relationship between yield stress of debris flow and clay minerals is not perfect up to now. Four common clay minerals such as montmorillonite, Illite, chlorite and kaolin are selected as study variables. The yield stress of debris flow is taken as the research objective, and the volume concentration of sediment particles in debris flow is changed in turn. Under the same conditions, different clay components have different effects on yield stress, montmorillonite has the strongest effect, Illite is the second, chlorite and kaolin are the weakest. (2) under the condition of single clay mineral, the relationship between yield stress and clay mineral is positively exponential; (3) under mixed clay minerals, the relationship between yield stress and clay minerals is the same as that under single clay minerals, but the change rate is smaller than that of single clay minerals. 4) the relationship between the yield stress of debris flow and clay minerals is verified by the domestic and foreign scholars' data, which has certain accuracy and availability.
【作者单位】：成都理工大学工程技术学院资源勘查与土木工程系地质工程教研室;成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金(41372366) 四川省教育厅基金(16ZB0407) 成都理工大学工程技术学院青年科学基金(C122016020)资助
【分类号】：P642.23
【正文快照】： 四川省教育厅基金(16ZB0407)和成都理工大学工程技术学院青年科学基金(C122016020)资助引用格式:马煜,余斌.泥石流体屈服应力与黏土矿物关系的试验研究[J].科学技术与工程,2017,17(21):202—207Ma Yu,Yu Bin.The influence of clay minerals and yield stress of debrisflow b

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