作　　者： ; ;

机构地区： 宁波大学建筑工程与环境学院

出　　处： 《岩土工程学报》 2019年第A01期173-176,共4页

摘　　要： 采用低碳、环保的镁质水泥对淤泥进行固化处理,研究了不同龄期下固化淤泥一维压缩特性。采用新型环刀制样方法,开展了镁质水泥固化淤泥的一维压缩实验研究。结果表明:固化淤泥的压缩曲线与结构性土变化趋势类似,固化淤泥的ln(1+e)–lgσ′v曲线存在一个明显的拐点(结构屈服应力),且随着龄期的增长,固化淤泥的结构屈服应力逐渐增大。基于扰动状态概念理论,提出了能反应固化淤泥强化与弱化并存的一维压缩模型,试验验证了该模型可以较好预测任意龄期下固化淤泥的一维压缩特性。 The low-carbon,environmental-friendly magnesia cement is used to solidify the silt,and the compression characteristics of the solidified silt at different ages are investigated based on the one-dimensional compression tests.A series of one-dimensional compression tests on the magnesia cement-cured silt under different curing ages are carried out using a new ring knife sample preparation method.It is found that there exists an obvious inflection point,structural yield stress,on the ln(1+e)-lgσ′v curve,which is similar to structural soils.Moreover,the structural yield stress of the solidified silt increases gradually with the increase of the curing age.Furthermore,an one-dimensional compression model to characterize the strengthening and weakening properties coexisted in the magnesia cement-solidified silt is proposed based on the concept of disturbed state.The experimental results show that the proposed model can reproduce well the one-dimensional compression characteristics of the solidified silt at any age.

关 键 词： 淤泥 固化 龄期 一维压缩 扰动状态概念

领　　域： []