Patent ID: 6238140
Filing Date: 2001-05-29
Classification: E02F

Abstract:
A method for burying pipe or tile underground, said method comprising the steps ofdigging a trench of a given width having a bottom with a desired grade,loosening the soil in a central portion of the trench bottom by pulling a groove cutter along the trench bottom with the groove cutter extending below the bottom of the trench,advancing a trench shield which is provided, at a leading end of the trench shield, with a groove shaper, along the trench bottom so that the shaper removes loosened soil from the central portion of the trench and forms a groove in the bottom of the trench, wherein said groove is narrower than said given width and wherein said groove is defined by spaced apart, V-shaped side walls,seating sections of tile or pipe in the groove so that said tile or pipe is supported either by said V-shaped side walls or, in the case of a larger tile or pipe, is supported by an upper edge of each of said side walls,connecting the sections to preceding sections, as necessary, and back filling the trench to bury the tile or pipe.