Large culverts and railway crossings
Large culverts and railway crossings
(OP)
We have several 3M x 3M culverts to install which will carry raw sewage.
Part of the route means that there are railways to cross.
I am familiar with pipelines but have no experience with pre cast concrete culverts.
What are some of the basic installation requirements for installing in normal rights of way in terms of cover above top of culvert, recommended depths under railways/ roads.
Is the culvert required to be leak tested? Can the culverts be isolated in a similar way to pipelines for inspection purposes?
If there are some companies that produce standard details I would be grateful for any recommendations.
It would also be useful to see what construction methods are possible which minimise construction time. I have seen the railway section removed whilst a culvert has been installed on one YouTube video but it was 4 smaller culverts for drainage reasons. I didn't know the exact size of the culverts on the video but they were about 3/4 of the installers height. So not as large as the single culvert we are installing.
Best Regards
John
Part of the route means that there are railways to cross.
I am familiar with pipelines but have no experience with pre cast concrete culverts.
What are some of the basic installation requirements for installing in normal rights of way in terms of cover above top of culvert, recommended depths under railways/ roads.
Is the culvert required to be leak tested? Can the culverts be isolated in a similar way to pipelines for inspection purposes?
If there are some companies that produce standard details I would be grateful for any recommendations.
It would also be useful to see what construction methods are possible which minimise construction time. I have seen the railway section removed whilst a culvert has been installed on one YouTube video but it was 4 smaller culverts for drainage reasons. I didn't know the exact size of the culverts on the video but they were about 3/4 of the installers height. So not as large as the single culvert we are installing.
Best Regards
John





RE: Large culverts and railway crossings
https://mega.nz/#!VMdTQYxK!XoGixJ9GwR3oiX7_wHakPcy...
Furthermore You can use the software (free download) called CANDE Culvert ANalysis and DEsign
(Google simply CANDE)
RE: Large culverts and railway crossings
RE: Large culverts and railway crossings
Roby... thanks for the info.
Dik
RE: Large culverts and railway crossings
RE: Large culverts and railway crossings
But not saline.
Regards
John
RE: Large culverts and railway crossings
http://www.hobaspipe.com/fileadmin/user_upload/May...
RE: Large culverts and railway crossings
JohnWeal, this is a complicated design. You need to find someone who's done it before. The portion under the railway is the least of your worries. The railways have tables with values of surcharges for under-railway designs. There's linings, waterstops and access to consider.
RE: Large culverts and railway crossings
But as we are writing specifications etc for the project, I would like an overview of the engineering involved and what International specifications need to be complied with as a minimum.
So is it not normally done in culverts 3m x 3m with such large flows? Sure I have only been involved with pipelines too but I have the site pastures that show all culverts which we have to butt up to.
RE: Large culverts and railway crossings
Culverts would be an "unusual" choice. I'm not sure of your flows, but I suspect there's a pipe that would work.
RE: Large culverts and railway crossings
RE: Large culverts and railway crossings
Will keep you updated once I receive more information on flows etc.
The project is in Northern Iraq.
RE: Large culverts and railway crossings