镁质水泥固化淤泥一维压缩特性研究  

A study of the 1D compression characteristics of magnesia cement silt

作　　者：饶春义 朱剑锋[1] 庹秋水 刘浩旭 RAO Chunyi;ZHU Jianfeng;TUO Qiushui;LIU Haoxu(Faculty of Architectural,Civil Engneering and Environment,Ningbo University,Ningbo,Zhejiang 315211,China)

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《水文地质工程地质》2018年第4期94-99,107,共7页Hydrogeology & Engineering Geology

基　　金：浙江省自然科学基金项目资助(LY17E080006);国家自然科学基金项目资助(51409142);宁波市自然科学基金项目资助(2017A610307)

摘　　要：采用低碳、环保的镁质水泥对淤泥进行固化处理,结合一维压缩试验研究了不同龄期下固化淤泥的压缩特性。首先开展了不同养护龄期下镁质水泥固化淤泥一维压缩实验,结果表明:固化淤泥的e-p曲线与淤泥变化趋势类似,而且随着养护龄期的增加,固化淤泥的孔隙比e逐渐减小。因此,镁质水泥对固化淤泥的孔隙有很好的填充效果。与此同时,固化淤泥的压缩系数随养护龄期呈指数减小趋势,根据压缩系数与龄期之间的函数关系,对太沙基一维固结理论进行修正,建立符合镁质水泥固化淤泥压缩特性的一维固结模型。The low-carbon and environment-friendly magnesia cement was used to solidify the silt.The compression characteristics of the solidified silt under different ages were investigated based on the 1D compression test.Firstly,the 1D compression tests of the magnesia-cement soil under different curing ages were conducted.The test results show that the e-p curves of the solidified silt are similar to those of the original silt.Moreover,the void ratio e of the solidified silt decreases gradually with the increasing curing age.Therefore,the magnesia cement has a good filling effect on the porosity of the cured silt.In addition,the compressibility of the cured silt shows an exponential decreasing trend with the curing age.Based on the functional relationship between the compressibility coefficient and age,the Terzaghi’s 1D consolidation theory was modified and the correspondent 1D consolidation model associated with the compression properties of the cured silt was established.

关 键 词：淤泥 镁质水泥 固化 一维压缩 孔隙比 压缩系数 

分 类 号：TU411.5[建筑科学—岩土工程]