低应力水平下吹填土的固结特性研究

Research on Consolidation Characteristic of Dredger Fill under Low Stress

通过室内固结试验,研究了低应力水平下吹填土的固结特性。试验结果显示出吹填土在e-σ’坐标系下存在着由超软土状态向一般软粘土状态固结转化的界点。在界点之前,不同初始含水率的吹填超软土孔隙比沿不同曲线变化;在界点之后,不同初始含水率的吹填超软土孔隙比沿土体所固有的压缩曲线变化。对比分析了吹填超软土和普通软土的固结变形量、压缩系数、固结系数的变化规律。

The consolidation characteristic of dredger fill under low stress was researched through indoor consolidation test. The test results showed a critical point at which the ultra-soft soil and common soft clay phases of dredger fill become identical based on e-σ’coordinates. The void ratio of ultra-soft soil in different initial moisture contents varies along the distinct curves before the critical point was reached,or its change followed the inherent compression curve of soil body. Ultra-soft soil and common soft clay were compared and analyzed to find out the change rules of consolidation deformation,compression coefficient and consolidation coefficient.