岩土力学2013，Vol.34Issue(3)：631-638,8.
孔隙变化对吹填土地基真空预压固结的影响
Effect of varying void on consolidation of dredger fill under vacuum preloading
摘要
Abstract
Dredger fill changes from fluid to soil and its void reduces markedly during the consolidation of reclaimed ground under vacuum loading. Because both permeability and compressibility are functions of void ratio, the consolidation coefficient of dredger fill changes greatly. The prediction by current design method is much different from engineering practice because the consolidation coefficient in this method is taken as a constant. In order to account for the effect of varying void on consolidation, the relation between consolidation coefficient and effective stress is derived; and a consolidation model for dredger fill is built by applying this relation to Barren's consolidation theory. The model is proved by comparing the result of this model with that of model test. The analysis result shows that the consolidation coefficient of dredger fill decreases with the void during the consolidation. Therefore, the consolidation of reclaimed ground is rapid in the initial stage and slow later. The quick decrease of the permeability of soil near the drainage board area will hinder the consolidation of soils in the farther area. Therefore, compared with the result of current design model, the consolidation of reclaimed ground is slower in the later stage and the whole period of consolidation is longer.关键词
吹填土/真空预压/孔隙变化/固结Key words
dredger fill/ vacuum preloading/ varying void/ consolidation分类
建筑与水利引用本文复制引用
邱长林,闫澍旺,孙立强,纪玉诚..孔隙变化对吹填土地基真空预压固结的影响[J].岩土力学,2013,34(3):631-638,8.基金项目
天津市重点项目基金(No.11JCZDJC23900). （No.11JCZDJC23900）
