Placing a 6 ft RCP Pipe under a Retaining Wall 1

[CWEngineer]

Currently I am working on a project in which they are proposing on placing a 6 ft RCP Pipe under a Retaining Wall, which will be approximately 15 feet in height, an will have an approximate 20 ft wide footing.

Here is a link of a paper I obtained - it contains Minimum Fill Heights for Highway Loading and Railroads but not Retaining Walls.

http://www.wvdot.com/engineering/files/500/DD502.pdf

I am planning to perform a D-load analysis on the RCP.

Do you guys have any recommendations, advice and/or reference I should consider for this design?

Also, do you guys know of any reference similar to the Virginia Paper, but for "California"?

THANKS

 

[pmkPE]

Go to

http://www.concrete-pipe.org/designdata.htm

 

[SlideRuleEra]

If this is a gravity flow pipe, I would suggest that you use no less than Class IV wall thickness. Also recommend o-ring joints. The differential cost of various wall thicknesses & joint details is minor compared with either installation cost or repair cost if there is a leak.

If it is a pressurized pipe, I suggest that you consider prestressed pipe from a quality supplier, such as Price Brothers. Again go with quality joints, possibly double o-rings (to allow joint testing before project completion).

 

[tincan]

We have constructed a concrete reinforced encasement of the RCP for protection, compacted backfill, and then constucted a wall. If the resulting wall footing soil stresses are within the pipe allowable, there may be no need for an encasement.
As noted above, use the best pipe available. Theres nothing like a good safety factor.
Best Tincan

 

[dicksewerrat]

Use the "d" wall pipe with the gaskets. Test before you build the wall. Do not let the wall set on the pipe. Even if you have to put in some piles. No matter what you design, someone in the field will do something to let the wall settle. That is why you need to put in redundant measures to protect the pipe. If the pipe fails the wall fails with the first flow through the pipe.

 

[JTMcC]

Why not use a protective steel casing pipe?
They are very common in road, river, RR crossings.

JTMcC.