海砂海泥混合料动强度特性研究  

Dynamic Strength Performance Research on Mixtures of Sea Sand and Sea Silt

作　　者：许小杰[1] XU Xiao-jie(Zhejiang Institute of Hydraulic ＆ Estuary, Hangzhou 310000, P. R. China)

机构地区：[1]浙江省水利河口研究院,杭州310000

出　　处：《科学技术与工程》2017年第2期273-277,共5页Science Technology and Engineering

基　　金：国家自然科学基金(51009054)资助

摘　　要：取自东南沿海某地区的海砂海泥分别按照2.5∶1、2∶1、1.5∶1、1∶1、1∶1.5、1∶2、1∶2.5的质量配合比制备混合料,用DDS-70微机控制电磁式振动三轴仪研究混合料的动强度特性。研究结果表明:混合料的动强度随围压的增大而增大,但增幅变小;海砂海泥质量配合比大于1.5∶1时动强度变化较小,小于1.5∶1时随着海泥含量的增加混合料动强度快速减小;混合料的动强度指标φ随海砂海泥质量比的减小而减小;动强度指标c在海砂海泥质量比2∶1时达到最大值,然后随着海泥含量的增加而减小。研究对海砂海泥混合料作为海堤填料时的动力特性分析具有重要意义。The mixtures are prepared using the sea sand and sea silt taken from Southeast coast area at the mass ratio of 2. 5∶ 1、2∶ 1、1. 5 ∶ 1、1 ∶ 1、1 ∶ 1. 5、1 ∶ 2、1 ∶ 2. 5 respectively. Its dynamic strength performance has been researched via the DDS-70 computer-controlled electromagnetic dynamic triaxial apparatus. The result shows that the dynamic strength of mixtures increases with the increasing of surrounding pressure but the increases trends is decreases; the change of dynamic strength is subtle when the mass ratio is larger than 1. 5∶ 1 and the dynamic strength shows a drastic decrease with the increasing of sea silt content when the mass ratio is smaller than 1. 5∶ 1; the dynamic strength parameter φ of mixtures decreases with the decreasing of the mass ratio while the dynamic strength parameter c achieve its maximum when the mass ratio is 2∶ 1,then shows a decrease with the increasing of the sea silt content. The research has great significance for the dynamic performance analysis of seawalls filled by mixtures of sea sand and sea silt.

关 键 词：海砂海泥混合料 质量配合比 动强度 动强度指标φ、c 

分 类 号：TU472.99[建筑科学—结构工程]