Abstract: A diesel hammer (20) is adapted to produce uplift blows by connecting its casing (30) via a pulling connection (52) to a case (24) to be pulled, removing vent plugs (76) from the top of the casing, sealing all other openings (78), (82), (94), in the casing, applying compressed air from an external source (106) under the hammer ram (32) to drive it upwardly and thereafter allowing controlled flow of air out of the casing via a bleed line (118) and an adjustable orifice (238) to cushion the subsequent fall of the ram.

Abstract: The method includes the steps of cleaning, priming, and coating pipe segments with a bituminous composition. The coated pipe segments are wrapped and carefully handled so as not to disturb the bituminous coating. Wire reinforcing cages are formed around the pipe segments and the individual pipe segments are then loaded into individual mold cars positioned end-to-end upon a first railway track assembly. The cars are then translated onto a first transfer car, which rides on a second track means, and are conveyed to a third railway track assembly comprising a plurality of parallel sets of rails. The mold cars are transferred abreast from the transfer car onto the third railway track assembly, filled with a cementitious weight coating material and fed into a drying kiln whereby the cementitious weight coating cures at least until the cement becomes self-supporting.

Abstract: A machinery supporting arrangement suitable for use in maintenance and repair of dam walls comprising a barge with a liftable platform for carrying the machinery. The platform extends out over the top of a dam wall when the barge is moored alongside it so that the machinery becomes supported in part by the dam wall and in part by the barge.