sheetpiles in sticky clay
sheetpiles in sticky clay
(OP)
I need to install about 200, 40ft long, sheet piles in soft clay. Sand fill for the first 3m then clay with SPT numbers from 1 to 5 for the next 60ft. Local knowledge indicates the clay is quite resistant to vibrated sheets. I would like to avoid the noise of hammering, and avoid the cost of a very large vibro. Because the sheets have to stay, I would like to minimize the material cost. I would like to use Z55 cold rolled sheets from Roll-Form(0.22" thick, 9 inches deep, 24 inches wide). I am considering pre drilling, with a plug ended 8" dia helical pipe pile with a 20" flight, possibly three 8 holes for each sheet and filling the voids with water during helical pile retraction in hopes this will allow the sheets to slide into place quite easily. I have installed may helical piles, but never tried this system of using them to create a water filled void.





RE: sheetpiles in sticky clay
Second, you did not say what the sheet piling is being used for or what it is intended to support.
Third, it seems to me that your described procedure will disturb the soil so much in front of and behind the sheets that there will be much movement of the soil and sheet piling that the performance of the wall(?) could be seriously affected.
www.PeirceEngineering.com
RE: sheetpiles in sticky clay
A vibro seems a good option but jacking tbe sheet piles would be a quieter way.
I don't see the need to pre-drill based on the information given
RE: sheetpiles in sticky clay
RE: sheetpiles in sticky clay
www.PeirceEngineering.com
RE: sheetpiles in sticky clay
RE: sheetpiles in sticky clay
www.PeirceEngineering.com