尾矿砂固结系数变化规律试验研究  

Experimental study on variation law of tailings sand consolidation coefficient

作　　者：田园[1] 张敬博[1] 马林[2] TIAN Yuan;ZHANG Jingbo;MA Lin(Water Resources Engineering Branch,Yangling Vocational and Technical College,Shaanxi Yangling 712100,China;Shanxi Transportation Research Institute,Taiyuan 030000,China)

机构地区：[1]杨凌职业技术学院水利工程分院,陕西杨凌712100 [2]山西省交通科学研究院,山西太原030000

出　　处：《西安建筑科技大学学报（自然科学版）》2020年第1期92-97,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：山西省应用基础研究基金项目(201701D221213);杨凌职业技术学院科学研究基金项目(A2017036)。

摘　　要：为了探究尾矿砂固结系数随干密度及压力的变化规律,本文分别对不同粗细颗粒、不同干密度的尾矿砂进行标准固结试验,以时间平方根法求取固结系数,并进行相关分析.试验表明,尾矿砂在固结压缩起始阶段变形最大,有显著的瞬时压缩变形,稍后变形逐渐趋缓;尾矿砂的固结系数皆随着压力的增加而下降,压力小于200 kPa时,固结系数下降较快,当压力达到200 kPa以后,固结系数下降趋缓.固结系数随着尾矿砂干密度的增大而减小,且粗粒尾矿砂比细粒尾矿砂的固结系数更大.In order to explore the variation law of tailings sand consolidation coefficient with dry density and pressure,this paper conducts standard consolidation tests on different coarse and fine particles and different dry density tailings sand,and calculates the consolidation coefficient by time square root method.analysis.The test shows that the tailings sand has the largest deformation at the initial stage of consolidation and compression,and there is significant transient compression deformation,and the deformation gradually slows down later;the consolidation coefficient of the tailings sand decreases with the increase of pressure,and the pressure is less than 200 kPa.The knot coefficient decreases rapidly.When the pressure reaches 200 kPa,the consolidation coefficient decreases.The consolidation coefficient decreases with the increase of dry density of tailings sand,and the consolidation coefficient of coarse tailings sand is larger than that of fine tailings.

关 键 词：尾矿砂 固结系数 时间平方根法 孔隙比 试验研究 

分 类 号：TU411.5[建筑科学—岩土工程]