AN EARLY STAGE IMPROVED CONSTRUCTION METHOD OF THE DREDGED SOIL TENDER BASE USING BALLOON MAT AND OUTER LAYER IMPROVED STRUCTURE

摘要

PURPOSE: A reforming method of soft ground of dredged soil using a balloon mat is provided to reduce a construction cost by reducing a construction period by making a construction work and traveling of construction equipment for dehydrating for reforming the soft ground conveniently and smoothly. CONSTITUTION: A reforming method of soft ground of dredged soil contains the steps of: spreading a balloon mat(2) on a surface of a ground of a base soft ground(1) as covering a non woven fabric mat(3) on the surface of the balloon mat(2), and sequentially accumulating a banking layer(5) and a sand layer(4) to be a drainage layer on an upper part of the non woven fabric mat(3). Herein, to reform the soft ground, a vertical drainage drain(7) and a horizontal drainage drain(8) are established which become the drainage drain for dehydrating of the soft ground(1) by entering a device for dehydrating. The vertical drainage drain(7) is vertically established to the depth as the soft ground(1) while the upper part of the vertical drainage drain(7) is protruded to a proper length on the upper part of the sand layer(4) that becomes the drainage layer. Hence, the horizontal drainage(8) is spread from a top soil in the sand layer(4) which becomes the drainage layer to a drainage channel(9).