APPARATUS AND METHOD FOR FORMING A CEMENTITIOUS CONDUIT IN SITU.

摘要

Apparatus for forming a cementitious conduit in a ditch or the like comprising: an upright elongated hollow movable sled having sides and a bottom conforming generally to the sides and bottom of said ditch and an integral upper skirt portion; a pair of generally axially aligned rotary drums disposed in said sled and below said skirt portion along the generally longitudinal axis thereof, the outer diameter of said drums being less than the inner diameter of said sled at said skirt portion so that a space conforming generally to the thickness of the conduit desired to be formed is provided between the outer walls of the drums and both said skirt portion and the side and bottom of said ditch; means operatively engaging said drums for rotat ing said drums about their longitudinal axes and in opposite directions; and means associated with said sled for introducing a cementitious material into said space.