Directional Boring under canal/railroad
Directional Boring under canal/railroad
(OP)
I have a client asking me to stamp a drawing for a directional bore underneath a railroad and a 50' wide x 10' deep canal which is not concrete lined. The boring company will be pulling a 10" dia. steel casing through and then a 4" pvc conduit inside of it. The bore would be 10' below the bottom of the canal; thus, 20' below the railroad.
Any suggestions? I'm concerned about water intrusion and possibly the pressure from the railroad. What are the standard procedures for this type of job?
Thanks.
Any suggestions? I'm concerned about water intrusion and possibly the pressure from the railroad. What are the standard procedures for this type of job?
Thanks.





RE: Directional Boring under canal/railroad
RE: Directional Boring under canal/railroad
http://www.dhprojects.com/NSRC/NSCE-8%20REV.pdf
RE: Directional Boring under canal/railroad
The Norfolk Southern document looks pretty good but railroad crossings should always be reviewed by the particular RR involved for their approval prior to stamping your client's drawing. For standard procedures you should refer to Practical Guide to Railway Engineering published by AREMA (The American Railway Engineering and Maintenance-of-Way Association)
http://ww
RE: Directional Boring under canal/railroad
If they are not cased, there is nowhere for any ingressed water to go. If cased, the casing will normally have vents for water removal or for filling the casing with paraffin or some other water displacing compound.
There doesn't appear to be any danger that is evident from your description so far. 20 feet below the railway and 10 feet below the canal should be more than adequate for any loading condition, if the pipeline is directionally drilled and pulled through or if it is a thrust bored cased crossing.
As was already stated above, the railroad will require their approval (as will probably also the canal owner) and it will be beneficial to you to have both of their approved drawings in your hand before you stamp it just to be sure that everybody's requirements are squared up beforehand and that there will be no confusion as to who approved what and when later on.
http://virtualpipeline.spaces.msn.com
RE: Directional Boring under canal/railroad
The standard installation procedures will be quite different depending on if it is a directional drill or a horizontal thrust bore.
If you need more information on the actual installation procedures, advise as to which of the 2 methods it is and there is plenty of informaiton available.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Directional Boring under canal/railroad
You may be better off pushing the casing through rather than directional drilling. You won't have to worry about the water breakthrough.
You probably need a bigger casing than 12" too. I think the rule of thumb is 6" larger on each side of the pipe.
RE: Directional Boring under canal/railroad
It depends on the length of the bore. If it is short, then thrust boring will be a better option, if it is a longer bore, then ditrectional is the way to go.
Roads are not typically cased anymore due to the horrendous problems they cause, but with a pvc carrier pipe, casing is fine. Rule of thumb back in the casing heh-day was 4" larger, i.e. with a 4" carrier, 8" casing would be used. But that again will be dependent on the length. It's hard to control 8" or 10" bore pipe much over 60'-90', if it's a thrust bore and over 80' long, I would go with a 12" casing.
The design of crossings (road or railroad) need to comply with 49 CFR Part 192.111.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Directional Boring under canal/railroad
http://virtualpipeline.spaces.msn.com
RE: Directional Boring under canal/railroad
http://www.tc.gc.ca/railway/Rules/TC_E-10.htm#1
http://virtualpipeline.spaces.msn.com
RE: Directional Boring under canal/railroad
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Directional Boring under canal/railroad
http://virtualpipeline.spaces.msn.com
RE: Directional Boring under canal/railroad
RE: Directional Boring under canal/railroad
RE: Directional Boring under canal/railroad
Richard A. Cornelius, P.E.
WWW.amlinereast.com