Pipe Bursting / Other non-opencut methods for sewers
Pipe Bursting / Other non-opencut methods for sewers
(OP)
I want to replace about 300 feet of old 8" sanitary sewer. I do NOT want to use open cut, as telephone poles and storm sewers are close, if not right on top, of this sanitary line. Plus, it's in a tight corridor with plenty of traffic.
The "sewer cleaning guys" think there is a collapse in the pipe.
Can pipe bursting be used to replace a pipeline even if there is a collapse in it? If not, what about direction drilling?
I don't think directional drilling is an option, because the slope is very low, and directional drilling isn't accurate for slopes of .20%
So, can pipebursting be used on lines even if there is a collapse? Any other ideas?
The "sewer cleaning guys" think there is a collapse in the pipe.
Can pipe bursting be used to replace a pipeline even if there is a collapse in it? If not, what about direction drilling?
I don't think directional drilling is an option, because the slope is very low, and directional drilling isn't accurate for slopes of .20%
So, can pipebursting be used on lines even if there is a collapse? Any other ideas?





RE: Pipe Bursting / Other non-opencut methods for sewers
The directional drill will likely have have a few dips in the mainline. I have trenched and shored very quickly in tight lanes and rights-of way and it is an easy solve. If traffic is a problem, construction in off hours and "half road" widths make it a relatively simple task and serves to minimize disruption to traffic. Backfilling with a fillcrete and quickly resurfacing with ACP is key as well.
I have done several of these projects and can provide seveal different ideas if you wish. Can you scan an overall plan and email it to me? I may have a few suggestions that I haven't considered yet.
KRS Services
www.krs-services.com
RE: Pipe Bursting / Other non-opencut methods for sewers
I haven't had our techs draw up anything planwise as of yet. The main problem is the proximity of the telephone and power poles, which are literally on top of or a foot or two away from the sewer pipe, horizontally.
I will probably replace the 2 manholes while I am at it. You are right in that drilling would put sags in the line - that definitely won't be an option.
Anyway, can one pipe burst through a sewer collapse? Even though I am not all that familiar with it, I wouldn't think so...?
RE: Pipe Bursting / Other non-opencut methods for sewers
With power poles, the telephones are underground?
Power poles are no big deal, they can be supported while excavating near them. Telephones, depending on the numbers of pairs, can be run temporarily and them replaced while backfilling. I'd say that trenching (36" - with shoring) will be your best bet to stay within the tolerance of the grade. How deep is the sewer pipe?
At most you will be looking at a few days, needing a good skid steer, a competent crew, a CAT 315 or 416 size backhoe/loader or equiv., and steady supply of trucks and possibly traffic plates (to cover the trench until ACP) or some firm coldmix. Three to four days would be a bonus as well, but two or three days should suffice.
KRS Services
www.krs-services.com
RE: Pipe Bursting / Other non-opencut methods for sewers
RE: Pipe Bursting / Other non-opencut methods for sewers
sewer-rat, the cleaning guys couldn't get the flushing head through. Plus, this line has sags in it, so it is always full of water. I believe they tried to send a camera through once but the pipe was too full of water.
I suppose if we got a vactor truck in, sucked the manhole and sewer out, then quickly got a camera in there, we might be able to see what the deal is. Maybe that's what I'll do. If it is collapsed in just 1 spot, as the case probably is, maybe we could do a spot repair, then burst the line?
RE: Pipe Bursting / Other non-opencut methods for sewers
RE: Pipe Bursting / Other non-opencut methods for sewers
Regarding your question to supporting the power lines, it's up to the utility. Sometimes they charge, but in other cases the municipality or owner of the right of way can make a convincing arguement that since the underground was in the ground first, it is the responsibility of the owner of the pole to ensure it remains supported. In some cases there are utility agreements in place and therefore they may be obligated to support the poles without charge.
I've made that arguement before and have been successful in some cases.
KRS Services
www.krs-services.com
RE: Pipe Bursting / Other non-opencut methods for sewers
Zambo
RE: Pipe Bursting / Other non-opencut methods for sewers
Open cut would still be cheaper?
RE: Pipe Bursting / Other non-opencut methods for sewers
The costs are high because apart from the specialist sub-contractor services the jacking pipes are also expensive.
Zambo
RE: Pipe Bursting / Other non-opencut methods for sewers
RE: Pipe Bursting / Other non-opencut methods for sewers
Would it be possible to move the location of the sewer line since you're replacing the manholes anyway? Then you could get it away from the other utilities?
As I understand it, pipe bursting won't work unless you can backfeed the tow cable through the line and connect it to the bursting head. If your line is collapsed you won't be able to do this.
Have you thought about only open cutting in the area of the collapse? and the utilize pipe bursting for the remainder of the line? You could use the open cut area for a send and receive pit for the pipe bursting activities and then just set an intermediate manhole in that location to tie it all together. That would minimize the open cut and pave restoration that you'll have to do.
RE: Pipe Bursting / Other non-opencut methods for sewers
I would like to move it, but there is just too many utilities in the way.