Hammer size for driving sheet piles
Hammer size for driving sheet piles
(OP)
Our contractor has a problem driving steel sheet piles, and I would like advice on hammer sizing. He is driving pairs of PZC-13 sheets(22 psf) 22 feet long into very stiff to hard fat clay below the water table. He is using a Dawson HPH 1800 hydraulic hammer rated at 7235 to 13750 foot-pounds per blow. He is running the hammer at minimum energy, getting resistance over 30 blows per inch at 17 feet of penetration, and curling the tops of the sheets.
I suspect that a bigger hammer will get the job done. His supplier says that a bigger hammer will simply curl the sheets quicker. What size hammer would commonly be used for this section? A Delmag D-12-30 is available.
I suspect that a bigger hammer will get the job done. His supplier says that a bigger hammer will simply curl the sheets quicker. What size hammer would commonly be used for this section? A Delmag D-12-30 is available.





RE: Hammer size for driving sheet piles
www.PeirceEngineering.com
RE: Hammer size for driving sheet piles
RE: Hammer size for driving sheet piles
www.PeirceEngineering.com
RE: Hammer size for driving sheet piles
RE: Hammer size for driving sheet piles
j. Piles shall not be driven without the use of a closely fitting cap or driving head. This cap or driving head shall be of such design as to distribute the blow of the hammer throughout the cross section of the pile.
www.PeirceEngineering.com
RE: Hammer size for driving sheet piles
You want the driving head to spread the impact over as much of the sheet (pile) head as possible. Will overall dimensions of the hammer allow driving singles without interference with adjacent sheets?
Yosh