CSP Culvert reconstruction
CSP Culvert reconstruction
(OP)
A stream flow through 2x48 inches diameter corrugated steel pipes, since 31 years now. Since then and 5 to 6 times a year, there has to be a clean up made in front of them to remove debris and sediment.
They don't have the hydraulic capacity to pass a 2-year peak flow without a significant increase of the WSE upstream (as normal depth exceed the rise of the culvert).
So now, we're planning on a reconstruction with an increase of the diameter (dimension) of the culvert.
First, I was thinking about a concrete box but there is 25 feet of fill over the pipe and a railway over. The first layer of 10 feet under the ground is organic matter. Then a silty clay.
Now thinking about a CSP (Aluminized Type 2) or aluminium pipe.
with a diameter of +/- 10 feet.
I am definately now a fan of CSP - is there another option and should I really exclude the concrete box?
They don't have the hydraulic capacity to pass a 2-year peak flow without a significant increase of the WSE upstream (as normal depth exceed the rise of the culvert).
So now, we're planning on a reconstruction with an increase of the diameter (dimension) of the culvert.
First, I was thinking about a concrete box but there is 25 feet of fill over the pipe and a railway over. The first layer of 10 feet under the ground is organic matter. Then a silty clay.
Now thinking about a CSP (Aluminized Type 2) or aluminium pipe.
with a diameter of +/- 10 feet.
I am definately now a fan of CSP - is there another option and should I really exclude the concrete box?





RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Well, I am wondering if this is an issue. Will check with the geotechnical engineer.
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: CSP Culvert reconstruction
Cleaning out a culvert 5 to 6 times a year for removal of debris and sediment sounds like there may be other issues here other than conveyance....will a larger culvert push the debris/sediment problem downstream? Does the downstream ditch/channel/other have capacity? Have you looked into erosion potential downstream? Just pulling straws here.......
RE: CSP Culvert reconstruction
True that after increasing the culvert dimension, we'll have to take protection measures for erosion downstream.
I'll check Bottomless arch. First, I was thinking about a circular culvert embedded in the ground (10% of height). A 106 inches CSP culvert.
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Contech arches are pricey, no?
RE: CSP Culvert reconstruction
The biggest concern I have with the bottomless arches is foundation scour. Make sure either you take a hard look at that, or your manufacturer does, or your geotech does. Someone needs to look at scour.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
But scour is an issue too as the bottom material is mainly a silty-clay. Well, the velocities won't be that high for a major event (e.g. 100-year) but enough to be problematic.
Thanks for help!
RE: CSP Culvert reconstruction
Bottomless Multiplate Arch dimensions = 156" x 81"
compared to CSP (aluminized)dimensions = 106"
RE: CSP Culvert reconstruction
See attached photo
Very cost effective to build!
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Many will
RE: CSP Culvert reconstruction
There were 3 stamps on this project!
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Height of Cover limits for steel pipe E80 live load (5" x 1") 10 gage steel is 54 feet. What is the length of pipe are you needing?
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
RE: CSP Culvert reconstruction
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com