System for driving open end pipe piles on the ocean floor using pneumatic evacuation and existing hydrostatic pressure

Abstract From the Canadian patent

A new pile assembly is disclosed. It comprises an open end pipe pile (a cylindrical pipe pile provided with a pile cap) that is provided with: (1) a diaphragm adapted to slide axially within said open end pipe pile; (2) a conduit that allows gases and liquids to flow to and from the upper portion of the interior of said open end pipe pile through a conduit port; and (3) a one-way valve that allows gases and liquids to flow from an inlet port (that is below said conduit port) in the interior of said open end pipe pile to an exhaust port on the exterior of said open end pipe pile. The preferred embodiment of the invention also comprises: (4) an open end pipe pile with a lower end of reduced …