box culvert analysys

[avrao]

I want to design a box culvert of span 10.0m and height of 6.00m, the barrel length is 13.0m with ends sqare. there is earth cushion of 1.40m on the top of the box. The railway live load passing the culvert at 42 degrees skew. how to analyse the box culvert.

 

[JAE]

how to analyse the box culvert.

Well you should probably research this on your own and also get a mentor to help you if possible. You might get some help here but not sure you'd get a complete and adequate understanding.

 

[jhnblgr]

Typically railroads have their own standards.
Based on your span and height you are looking at a bridge or an aluminum arch culvert. Concrete is impractical for the spans and height typically.

 

[EngDM]

Typically railroads have their own standards.
Based on your span and height you are looking at a bridge or an aluminum arch culvert. Concrete is impractical for the spans and height typically.

Agreed, especially with the rails coming in at a near 45° skew.

 

[IDS]

Based on your span and height you are looking at a bridge or an aluminum arch culvert. Concrete is impractical for the spans and height typically.

Precast concrete arches are perfectly practical for a buried arch of that size, and they have the added benefit that the supplier will do the design.

Disclosure: I used to work for Reinforced Earth (now Geoquest) who supply the TechSpan arch system, and they are now my biggest client.

 

[BridgeSmith]

I agree this is impractical to do as box culvert. Concrete arch, steel arch, or a bridge would be the more economically feasible options.

I see you list your job as "Student". If this is a school project, it should be posted in the Student section.

 

[GeorgeTheCivilEngineer]

PD 6694-1:2011 is a Eurocode document specifically about the design of buried concrete structures. 10m is unlikely to be feasible but multiple units would be.

 

[BridgeSmith]

PD 6694-1:2011 is a Eurocode document specifically about the design of buried concrete structures. 10m is unlikely to be feasible but multiple units would be.

Multiple units to get the 10m width would be fine, but the 6m height would likely put it out of the range of sizes for a precast section, at least in most or all of the US. Casting concrete walls that high would be a significant challenge, as well.

Our preferred option for something with the OP's site parameters would be a concrete or steel arch.