alternatives to RGRCP in street

[cvg]

anybody used large diameter (72 - 90 inch) HDPE profile wall pipe? How about cement mortar lined corrugated steel pipe in the same size range?

Was it cost effective?

How has it performed?

Any issues with installation or constructability?

 

[pittsig]

cvg,
We've generally used aluminum or aluminized steel on larger culverts and arches.

I haven't seen any cement mortar lined corrugated steel pipes, although we repaired some unlined corrugated steel pipes by pouring new concrete inverts (taking the necessary precautions to protect stream, etc.)

We have several older bitumious lined corrugated steel pipes which have done okay in general. The bituminous lining may crack and delaminate in places, exposing the steel.

Generally we don't have much HDPE in the right of way. I believe the largest is 48" dia. installed about 5-6 years ago.

Contractor oversight, backfill material, and compaction all would be even more critical with larger diameter HDPE.

 

[fel3]

Fresno Metropolitan Flood Control District uses lots of large-diameter cast-in-place concrete pipe. They have been quite successful with it. Paranoid me…I like my concrete reinforced, sidewalks excepted, but I have used it on their projects because that's what they do and it works.

Do a Google search on "cast-in-place concrete pipe" and you will find lots of info.

 

[cvg]

yes, I plan to also look at cast in place concrete pipe. However, as you know, it requires specific soil conditions to be feasible. And around here, we are required to oversize if we are substituting cast in place to account for what is assumed to be less efficient hydraulic conditions. Plus the wall thickness is greater than for RCP. Our problem is that we are tight between an existing 24" waterline and a 12" high pressure gas line and need to look at options for constructability in this tight space.