摘要
底流尾矿砂是中线法尾矿坝筑坝材料。对底流尾矿砂开展共振柱试验，探讨含水率、干密度及固结压力对其动剪切模量和阻尼比的影响。试验结果表明：最大动剪切模量Gdmsx随固结压力和干密度的增大而增大，随含水率的增大而减小；最大阻尼比λmax随固结压力和干密度的增大而减小，但对含水率的变化不太敏感。小应变（10^-6-10^-4）条件下：动剪切模量Gd随固结压力和干密度的增大而增大，随含水率的增大而减小；阻尼比λ随固结压力、含水率的增大而减小，随干密度的增大而增大。研究成果可为尾矿坝动力反应分析提供基础数据。
The underflow tailing sands is the construction material of central line tailings dam. The resonant columntests are carried out on underflow tailing sands. The influence of moisture contents, dry density and consolidation pressure on dynamic shear modulus and damping ratio are discussed. The results show that： the maximum dynamicshear modulus increases with the increasing of consolidation pressure and dry density, and decreases with the in- creasing of moisture content. The maximum damping ratio decreases with the increasing of consolidation pressureand dry density, but is not sensitive to the change of moisture content. Under the condition of small shear strain （ 10^-6 - 10^-4）, dynamic shear modulus increases with the increasing of consolidation pressure and dry density, butdecreases with the increasing of moisture content ; damping ratio decreases with the increasing of consolidation pres- sure and moisture content, but increases with the increasing of dry density. The results could provide basic data for the tailings dam dynamic response analysis.
出处
《地震工程与工程振动》
CSCD
北大核心
2016年第6期30-37,共8页
Earthquake Engineering and Engineering Dynamics
基金
河北省教育厅高等学校科学技术研究重点项目(ZD2015214)
地震科技星火计划项目(XH14073Y)~~
