摘要
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。
Land reclaimed by dredger soils can solve the land shortage and pollution of dredger soil. Consolidation characteristics of dredger soil were studied by mode~ test with IFCO BAT-system and TDR system. The varieties of porosity, permeability, pore pressure and settlement were gained, and the relations among porosity, permeability and effective stress were also obtained. It is found that the relationships are similar to Tiller＇s model of dredger soil, and the parameters of Tiller＇s model are gained. Based on Gibson＇s theory and Tiller＇s model, consolidation model for dredger soil is gained under self-weight and vacuum pressure. With this model, pore pressure and consolidation degree are discussed during the consolidation. The model tests are analyzed, and the analytic results are close to the testing results.
出处
《建筑结构》
CSCD
北大核心
2012年第8期114-118,123,共6页
Building Structure
关键词
吹填淤泥
自重
负压
固结特性
孔隙水压力
有效应力
渗透系数
孔隙比
沉降
dredger soil
self-weight
vacuum pressure
consolidation characteristic
pore pressure
effective stress
permeability coefficient
porosity
settlement
