Fixing culvert end settlement
Fixing culvert end settlement
(OP)
I have a culvert that drains under a roadway embankment. The culvert inlet (15-foot section of 16-inch RCCP) has settled about 6 inches at the inlet and is now sloped in the opposite direction (away from the embankment, so water pools around the inlet). The downstream side has not settled. Does anyone have any suggestions for resetting the slope of the pipe without excavating and resetting?





RE: Fixing culvert end settlement
I have heard about a type of technology where concrete is pumped under a sidewalk or/ slab on grade to lift and support a structure to a required elevation.... you may be able to take a look into something like this. Unfortuneately, I do not have a contact. If you have a paved suyrface over top of this culvert, it will likely crack if you start to lift the pipe.
Another option to look at, depending on conveyance requirements, may be to look at lining the pipe with a steel liner.
Could you line the inlet with rap-rap to minimize the pooling? Does the settling have a big impact on the overall conveyance and headwater elevation of the culvert?
RE: Fixing culvert end settlement
I like the steel liner idea. I'll have to check the geometry to see how much smaller that liner will be than the original culvert.
RE: Fixing culvert end settlement
This method can also be used to raise the ground surface or structure.
RE: Fixing culvert end settlement
RE: Fixing culvert end settlement
RE: Fixing culvert end settlement
When I recommend Compaction Grouting for lifting near surface objects, I usually assume the grouting will begin at least 10' below the settled structure. The grout is VERY stiff and the crew had better have 'the touch'.
I just throw it out as a possibility.
Sewer lines have been raised or straightened.
Sewer lines have also been collapsed.
RE: Fixing culvert end settlement
RE: Fixing culvert end settlement
Richard A. Cornelius, P.E.
WWW.amlinereast.com