Analysis of Sheet Piling with Multiple Tiebacks
Analysis of Sheet Piling with Multiple Tiebacks
(OP)
I am attempting to analyze sheet piling and size for an estimate. The piling is to be used for a construction excavation. The piling will be approximately 26' deep and must resist very large pressures due to groundwater. I have referenced the US Steel sheet pile design manual and have determined that only using 1 tieback near the top will not be sufficient. I am considering 3rd or quarter points. Does anyone have any good references for this scenario or have any suggestions on how to model this in a FEM? I have access to STAAD, but I'm not sure how to model how the pile is embedded.






RE: Analysis of Sheet Piling with Multiple Tiebacks
As for anchor locations, if the excavation is for a building basement we position the anchors just above the FFL of the slabs because on most jobs we do the anchors are temporary only and need to be destressed and removed(council requirement). Being just above the finished levels of the slabs allows easy access for the rig to remove the anchors once the slabs have been poured and are supporting the sheets. Also, have you considered dewatering the site for the temporary excavation?
RE: Analysis of Sheet Piling with Multiple Tiebacks
RE: Analysis of Sheet Piling with Multiple Tiebacks
RE: Analysis of Sheet Piling with Multiple Tiebacks
Mike Lambert
RE: Analysis of Sheet Piling with Multiple Tiebacks
RE: Analysis of Sheet Piling with Multiple Tiebacks
You also mentioned that there are other foundations with settlements likely - in such a case sheetpiles are too flexible for use and you should consider more rigid retaining structures. Then comes the comparisons of classical method to SSI or Finite Element method. What if all 3 methods agree with each other, but you have no "feel" for anticipated loads and maximum moments? How or when would you say, "these values can't be right"?
Finally, it is nice to start off with a simple cantilever pile, then on next job a one level tieback sheetpile and so on. If this is your very first sheetpile job, it is a bit advanced for a starter project. I come to the same conclusion, get an experienced designer to assist you. Good luck.
http://www.soilstructure.com/
RE: Analysis of Sheet Piling with Multiple Tiebacks