Pipe through corner of catch basin, how to analyze?
Pipe through corner of catch basin, how to analyze?
(OP)
I've got a structural situation that seems apparently more than adequate from an intuitive standpoint, and certainly looks plenty strong to the untrained eye, but is pretty damned difficult to rationally model:
A rectangular catch basin with 6" thick walls is site cast around a 24" RCP with 3" walls. The interior dimensions of the catch basin are 32" x 62". The inside crown of the pipe is 27" from the top of the basin, and the flowline of the pipe is at the bottom of the basin. Pretty normal stuff, right? Well, here is the hard part: The pipe penetrates the corner of the basin at a roughly 45 degree angle.
Now I look at this thing, and I know it won't fail, but I cannot figure out how to model it. The only simplified solution I have is to figure each wall of the catch basin over the pipe as a cantilevered deep beam over the pipe. Seems like a pretty crappy solution, though.
Any thoughts?
A rectangular catch basin with 6" thick walls is site cast around a 24" RCP with 3" walls. The interior dimensions of the catch basin are 32" x 62". The inside crown of the pipe is 27" from the top of the basin, and the flowline of the pipe is at the bottom of the basin. Pretty normal stuff, right? Well, here is the hard part: The pipe penetrates the corner of the basin at a roughly 45 degree angle.
Now I look at this thing, and I know it won't fail, but I cannot figure out how to model it. The only simplified solution I have is to figure each wall of the catch basin over the pipe as a cantilevered deep beam over the pipe. Seems like a pretty crappy solution, though.
Any thoughts?






RE: Pipe through corner of catch basin, how to analyze?
RE: Pipe through corner of catch basin, how to analyze?
RE: Pipe through corner of catch basin, how to analyze?
IMHO, if the buried pipe run itself is adequate for the loading, then the wall that includes the embedded pipe is too. (Think of the concrete wall that encases the pipe as some "really good" backfill)
www.SlideRuleEra.net
RE: Pipe through corner of catch basin, how to analyze?
The City of Houston flagged it, though, because it passed through the corner, which is contrary to their details, and I was assuming that they would want numbers to justify my contention that the system was structurally adequate. I'll stamp it without running a single calc, if they'll accept it.
BTW, there is no way they flagged it for hydraulic reasons.
RE: Pipe through corner of catch basin, how to analyze?