cofferdams
cofferdams
(OP)
I am interested in knowing when you need to install sheet piles, or when you can get away with using something like jersey barriers or sandbags as protection. I will be working with a bridge construction over a stream that has a mean flow of 1 ft3/s. Please help, as I have no experience in construction.





RE: cofferdams
If you just need to divert the stream to dry out a work area then a wall designed to withstand expected head and built on the stream bed would work. Search for "porta dam" on internet for an alternate to sandbags which is good up to about 8 ft head. Pumps inside would take care of leakage.
If the water depth is going to be greater than that then use sheetpile. Also if you need to excavate below the stream bed then you need to drive sheets first since there is no good way to excavate in the wet and install a wall to seal and dewater afterwards.
RE: cofferdams
RE: cofferdams