Slipped formed slotted drain.
Slipped formed slotted drain.
(OP)
check out this site. http://www.aran.com.au/slipform.htm
I have selected this product for draining the pavement of a roadway that is to be widened, curbed, and currently drains to a center ditch (excellent design but I need the space to add 4 new lanes. I have 40 million dollars worth of buildings to leave on the outside so widening on the outside is not an option.). This road has a 0% grade for 1.5 miles. I can't see the contractor getting it flat enough where I would be happy with DI's. Current standard for principal arterials do not allow spread out of the gutter making this the most attractive alternative I can find. If anyone has any ideas on how to calculate the capacity of the formed pipe please post them. Mannings equation is not usable on a completely flat grade and I'm not up to doing a non linear calculation. No one sees a problem with the concept but I would love one of you structural guys to check the need for reinforcing. I talked to a slip form manufacturer and the cost for the form is about $8000. There is no licensing and have decided to design my own shape, a square with a 15" conduit. I'm also interested in what difficulties I may face getting FHWA approval. Any comments and suggestions welcome.
I have selected this product for draining the pavement of a roadway that is to be widened, curbed, and currently drains to a center ditch (excellent design but I need the space to add 4 new lanes. I have 40 million dollars worth of buildings to leave on the outside so widening on the outside is not an option.). This road has a 0% grade for 1.5 miles. I can't see the contractor getting it flat enough where I would be happy with DI's. Current standard for principal arterials do not allow spread out of the gutter making this the most attractive alternative I can find. If anyone has any ideas on how to calculate the capacity of the formed pipe please post them. Mannings equation is not usable on a completely flat grade and I'm not up to doing a non linear calculation. No one sees a problem with the concept but I would love one of you structural guys to check the need for reinforcing. I talked to a slip form manufacturer and the cost for the form is about $8000. There is no licensing and have decided to design my own shape, a square with a 15" conduit. I'm also interested in what difficulties I may face getting FHWA approval. Any comments and suggestions welcome.





RE: Slipped formed slotted drain.
Structurally, wheel loads will damage the rims of the slots, so place them outside traffic. Placing reinforcement may be feasible but quite a mess for this system. It is likely that is within the requirements of a drainage of this kind to understand that some small cracks may appear and water flow pass to the ground there. In reality this is much an understanding for too many sewage works. If an agency demands tight waterflow, then the attention and details proper of pressurized pipes need be put in place, and this may make the slot system inadequate out of costly compatibility with well engineered reinforcement.
RE: Slipped formed slotted drain.
Other people may be able to give you some manufacturers supplying similar products in your area.
RE: Slipped formed slotted drain.
Have you checked out Aco Drain? Our state DOT was willing to accept them for a similar situation as yours (widening within the right of way, 2-ft gutter spread). The company seems to have well developed hydraulic data available, too.
http://www.acousa.com/drain.htm
RE: Slipped formed slotted drain.
RE: Slipped formed slotted drain.
RE: Slipped formed slotted drain.
RE: Slipped formed slotted drain.