Fremgangsmåte ved avretting og fylling av gröfter, og innretning til bruk av oppretting og fylling av gröfter

摘要

A method for levelling and filling a ditch is described, where a levelled layer of fine material is provided together with a contiguous layer of coarse material. A box-shaped device is described, having a height-adjustable rear end (11) which when raised and lowered will determine the levelling height of the fine material which is in the box-shaped frame and exits therefrom below the raiseable and lowerable end wall when the box-shaped frame is moved through a ditch. Lateral projections (26, 27) on the end wall (11) bring about a simultaneous dispensing/apportioning of coarse material along the side of the levelled layer of fine material (3). Whilst the box-shaped frame is moved forward and dispenses the layer of fine material, the side projections (26, 27) will deal with the dispensing/levelling of coarse material thrown thereon. The box-shaped frame has a roof (16, 17) having crossfall, which will guide the coarse material down to the side. The roof (16, 17) can be opened to allow the box-shaped frame to be filled with fine material.