Pipe Flange connection detail in a RCC Underground Pit
Pipe Flange connection detail in a RCC Underground Pit
(OP)
Hi, I have a underground in which the Pipe is Anchored as shown in the Figure below.



The Pit is formed by keeping a hole as shown in the elevation for pipe flange connection. Later the Pipe is installed and grouted
as shown in the elevation and section. The grout locks with the wall.
The flange cracks the concrete and if the concrete gives up in breaking it engages the re-bar which is subjected to shear.
Please correct me if I am wrong.



The Pit is formed by keeping a hole as shown in the elevation for pipe flange connection. Later the Pipe is installed and grouted
as shown in the elevation and section. The grout locks with the wall.
The flange cracks the concrete and if the concrete gives up in breaking it engages the re-bar which is subjected to shear.
Please correct me if I am wrong.






RE: Pipe Flange connection detail in a RCC Underground Pit
It looks to me like in one direction of force, you'd have a punching-shear problem, in the other direction, a shear-friction problem (plus plate-bending of the whole vault side). In the shear-friction case, the rebar is not just loaded in shear, but is assumed to act in tension holding the surfaces together. That implies some relative movement between them, and also implies that you have enough embedment on either end to develop the force- which looks doubtful in the sketch.
RE: Pipe Flange connection detail in a RCC Underground Pit
If your pipe has enough force that you're having problems with punching shear, you might want to check your pipe analysis. From the picture, you should have basically no force on the wall.
Or listen to JStephen and put in a penetration and seal it with link seals.
RE: Pipe Flange connection detail in a RCC Underground Pit
Dave
Thaidavid
RE: Pipe Flange connection detail in a RCC Underground Pit
Dik