Research on the Feasibility of Consolidating Flowed Dredger Fill by Horizontal Plastic Drainage Strip Method

A new consolidation method called layered horizontal plastic drainage strip method was proposed to accelerate the consolidation of flowed dredger fill.Analyses about the influences of space between plastic drainage strips,permeability of dredger fill and cofferdam on consolidation effect were carried out based on the plane strain Biot consolidation FEM theories.The results indicated that the permeability of dredger fill affects the settlement and pore pressure dissipation intensively.It was the most important factors affecting the consolidation effect.The space between plastic drainage strips and the permeability of cofferdam were the secondary factors.The real project suggested that this method had a lot of advantages,such as shortening consolidation time evidently,construction convenience,low cost and so on;it was a new effective method that can solve the consolidation problem with flowed dredger fill.