关键词: 吹填土, 沉降过程, 沉降机理, 初始含水率, 掺砂量

Abstract:

Dredger fill settlement is a nonlinear process. The initial water content and sand content have direct effects on it. This research is carried out by settlement experiments on gravity settling characteristics. The effects of initial water content and sand content are analyzed. The settlement process is divided into three phases in which dredger fill's amount of settlement, settlement rate, void ratio and water content are analyzed. The results show that dredger fill with higher initial water content has more settling velocity, and settlement retard point appears earlier. After a settlement retard point appears, the amount of settlement becomes fewer. With lower initial water content, self-weight consolidation begins earlier, and the settlement retard point appears later. Sand content has less effect on the earlier settlement process, but has more effects on settlement in the consolidation stage. Sand content has little effects on dredger fill with high initial water content.

Key words: dredger fill, settlement process, settlement mechanism, initial water content, sand content