An improved method and apparatus for driving piles:into and withdrawing them from underwater ground beds

摘要

855,042. Pile driving: jetting apparatus. MACKLEY, F. R. March 3, 1959 [March 4, 1958], No. 6966/58. Classes 68(1) and 68(2). To facilitate entry and withdrawal of piles and pile structures 11 into and out of the ground whilst being subjected to vibration there is secured to the pile or structure a conduit system 23, 24. arranged to discharge a jet of air or water or both under pressure in the region of the lower end of the pile or pile structure 11.