级配铁尾矿石的动三轴试验研究  

Dynamic triaxial test on graded iron tailing

作　　者：郭乃胜[1,2] 王聪[1] 赵颖华[1] 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]辽宁省公路工程重点实验室,辽宁大连116026

出　　处：《大连海事大学学报》2013年第3期112-116,共5页Journal of Dalian Maritime University

基　　金：辽宁省交通重点科技项目(201101);中央高校基本科研项目(3132013315)

摘　　要：为研究级配铁尾矿石的动态性能,根据级配碎石设计推荐的级配范围,选择两种级配类型(连续密实型和骨架密实型)进行了铁尾矿石的级配组成设计,并采用动三轴试验得到其动态回弹模量.试验结果表明,与级配碎石相同,级配铁尾矿石的动态回弹模量与应力状态呈非线性关系,可采用模型表征.由级配尾矿石所在结构层的受力状态,并应用该模型确定的动态模量值表明,骨架密实型优于连续密实型,但两者的动态回弹模量值均能够满足设计使用要求.To analyze dynamic behaviors of graded iron tailing, two gradations （ continuity tightness and framework tightness） are chosen for gradation composition design based on the recommen- ded range of graded gravel in China, and furthermore triaxial test is performed to obtain dynamic modulus of graded iron tailing. Results show that graded iron tailing represent nonlinear relation- ship between dynamic modulus and stress state, which has better consistency with graded gravel, and model can be used to ex- press the relationship. Framework tightness is superior to conti- nuity tightness according to stress characteristics of structure lay- er and dynamic modulus derived from the model, whereas dy- namic modulus of two gradations of iron tailing can satisfy the de- sign requirement.

关 键 词：铁尾矿石 三轴试验 动态回弹模量 级配 

分 类 号：U414[交通运输工程—道路与铁道工程]