论文部分内容阅读
利用吹填淤泥造地能够解决建设用地紧缺及吹填淤泥对环境污染等问题。联合IFCO BAT系统和TDR系统,设计大型模型试验对吹填土在自重及真空负压下固结特性进行研究。试验得到吹填淤泥在固结过程中孔隙比、渗透系数、孔隙水压力和土面沉降的变化情况,并整理得到孔隙比和渗透系数随有效应力的变化关系,发现与Tiller(1984,1985)模型接近,同时得到了Tiller模型中各项参数。还在Gibson一维大变形固结理论和Tiller模型基础上建立了以有效应力为控制变量的吹填淤泥在自重和负压作用下的固结模型,并用差分法对其进行求解。讨论了孔隙水压力在固结过程中的变化情况和固结度随负压的变化情况。最后,采用所提出的固结模型对吹填淤泥模型槽试验进行了分析,理论计算结果与试验结果相近。
The use of dredging mud to build land can solve the shortage of construction land and dredging mud on the environment pollution and other issues. In conjunction with the IFCO BAT system and the TDR system, a large-scale model test was designed to study the consolidation behavior of dredger fill under dead weight and vacuum pressure. The change of void ratio, permeability coefficient, pore water pressure and soil settlement in the process of consolidation of the dredged sludge were obtained and the relationship between void ratio and permeability coefficient with effective stress was obtained. The model is close to each other and the parameters of the Tiller model are obtained at the same time. Based on the Gibson one-dimensional theory of large deformation and consolidation and the Tiller model, the consolidation model of the dredged sludge with effective stress as the control variable under self-weight and negative pressure is established and solved by the difference method. The variation of pore water pressure during consolidation and the change of consolidation degree with negative pressure are discussed. Finally, the proposed consolidation model is used to analyze the flume-filled sludge tank model. The theoretical calculation results are in good agreement with the experimental results.