淤泥海砂混合料动力特性试验研究  

Experimental study on dynamic behavior of subsea sand-clay mixture

作　　者：王启叶楠 丰土根[1,2] 宋健 姜伟 

机构地区：[1]河海大学,岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]江苏省岩土工程技术工程研究中心,江苏南京210098

出　　处：《水运工程》2017年第10期96-100,129,共6页Port & Waterway Engineering

基　　金：国家自然科学基金资助项目(51009054);教育部科学技术研究重点项目(109077);江苏省科学基金资助项目(BK2010513);中央高校基本科研业务费专项资金资助项目(2014B04914)

摘　　要：沿海地区淤泥和海砂储量丰富,适当配合比的淤泥海砂混合料理论上可用于海堤填筑。采用DDS-70型动三轴试验系统和GZZ-50型共振柱试验系统,对不同配合比的淤泥海砂混合料进行动力特性试验研究,得出淤泥海砂混合料的动强度和最大动剪切模量,并分析不同配合比和固结围压对淤泥海砂混合料的动强度以及最大动剪切模量的影响。试验结果表明,淤泥海砂混合料的动强度和最大动剪切模量均会随着固结围压的增大而增大;随着混合料中海砂含量的降低及淤泥含量的增加,其动强度和最大动剪切模量会减小。The clay and sea sand in coastal areas are abundant and appropriate ratio of clay mixed with subsea sand can be used for constructing seawall theoretically.Adopting the DDS-70 cyclic tri-axial test system and GZZ-50 resonant column test system, we carry out the experimental study on the dynamic behavior of the subsea sand-clay mixture with different blending ratios and obtain the dynamic strength and maximum dynamic shear modulus it. Moreover, the influence of the blending ratio and confining pressure on the dynamic strength and maximum dynamic shear modulus are analyzed.The results show that the dynamic strength and maximum dynamic shear modulus increase with the enhancement of the confining pressure; with the decrease of proportion of sand and the increase of proportion of clay, the dynamic strength and maximum dynamic shear modulus decrease.

关 键 词：海砂 淤泥 动强度 动剪切模量 

分 类 号：TU435[建筑科学—岩土工程] U652.2[建筑科学—土工工程]