Half Cutted 48" Pipe Receiving Load

[Spawl]

hi, everyone, as a junior engineer i hope some seniors can help me.
i have a case:

i need a protection for live pipe,
the lastest idea was to cover the live pipe with half cutted 48" and restrained with some channel structure below it.
the skecth for this

this casing will be covered with 1 m thickness soil.

and a some heavy equipmen will go above it.

lets say the load will be 30 Tonne.


my question is.
how i calculated the pipe will not break/bending or simply i want to calculate the strength of half pipe.
i tried to use sap2000 to make a model of it, but all i get is displacement and stress working in the pipe.
or there is a way to check "ratio" of steel plate?

if its a concrete plate i understand what to do with the the stress/moment working in the plate,
but for steel? can someone giving explanation or even reference i can read to understand this. i need this.

Regards,
Spawl

 

[KootK]

You'll need to:

1) Check your stresses against allowable stresses per AISC manual recommendations.

2) Check plate buckling which is going to be tough. You may need to dig a bit deeper for that: Link


I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[BUGGAR]

There are arch culverts made for this purpose. The manufacturers can provide load ratings and installation recommendations.

 

[Spawl]

KooTK : thanks, ill start to learn AISC here.
BUGGAR : cant do that, if i buy manufactured culvert ill takes 1 month to arrive to the site. expediting things is a very hard case here. lol

 

[BUGGAR]

If you are using corrugated gage steel, you may need to check the AISI code. It covers steel less than 3/16" thick.
You could make your first lift of backfill out of lean concrete. After it sets up, backfill the rest of the way per usual. Soil cement would work.

 

[cvg]

your live load is not excessive. probably similar to AASHTO HS-20 and with 3 1/2 or nearly 4 feet of cover, not a lot of pressure on your pipe, your earth loads are also low. are you sure you need any casing at all? If you want to provide extra support, cement slurry up to the spring line would be good as buggar suggested

 

[Spawl]

BUGGAR & cvg : i havent calculate that yet, but i am pretty sure the owner wont allow anything to touch its live pipe. so protecting the pipe with this kind of culvert is the only thing comes out in my mind. (people standing in the pipe is forbidden, theyll kick the people out from the site. LOL), the regulation here is bit annoying.