淤泥减水后淤泥海砂混合料固化试验研究  

Experimental Study on Solidification of Silt and Sea Sand Mixture after Water Reduction of Silt

作　　者：谢康 丰土根[1,2] XIE Kang;FENG Tugen(Key Laboratory of Geomechanics and Embankment Engineering,Ministry of Education,Hohai University,Nanjing,Jiangsu 210098,China;Geotechnical Engineering Research Center of Jiangsu Province,Hohai University,Nanjing,Jiangsu 210098,China)

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]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098

出　　处：《河北工程大学学报（自然科学版）》2019年第4期65-71,共7页Journal of Hebei University of Engineering:Natural Science Edition

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：为了研究物理力学性质接近工程要求的淤泥海砂掺合比,首先通过晾晒及掺入生石灰的方式对淤泥进行减水,找到易于破碎均匀的含水率,再按照不同质量比掺合且依据不同的试验规定进行制样,设计不同的养护龄期样品。在相对应龄期通过直剪试验、压缩试验、无侧限抗压强度试验以及渗透试验来甄选适合于工程实际的掺合比。结果表明:海砂与石灰土的掺合比为1∶2时,黏聚力基本达到峰值,内摩擦角随石灰土比重增加而减小,养护28 d后混合料接近低压缩性土,也满足对渗透要求低的工程。In the sea embankment filling project,in order to find out the suitable mixing ratio of silt and sea sand,The methods of drying and adding quicklime was used to reduce the water content of the silt,and finds the moisture content which is easy to be broken and even.According to different quality ratio and different test regulations,samples are prepared,and different curing age is designed.In the corresponding age,direct shear test,compression test,unconfined compressive strength test and penetration test are used to select the appropriate mixing ratio for the actual project.The results show that the cohesion basically reaches the peak value,when the mixing ratio of sea sand and lime soil is 1∶2,and the internal friction angle decreases with the increase of the proportion of lime soil.After curing for 28 days,it is close to the low compressibility soil,which also meets the engineering of low permeability requirements.

关 键 词：淤泥减水 直剪试验 无侧限抗压强度试验 渗透特性试验 

分 类 号：U654[交通运输工程—港口、海岸及近海工程]