Sewer line running under retaining wall

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Old 11-04-14, 10:49 PM
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Sewer line running under retaining wall

While digging the trench for a front yard retaining wall, I encountered the sewer line. The top of the pipe is a height that is going to just barely interfere with the first course of blocks which are going to be fully buried. What's the best way to handle this?
 
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Old 11-05-14, 04:09 AM
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just bridge it,,, i'd like 4" of conc above the line + the diam of the pipe - eg, 4" pipe, btm of conc bridge 4" above - nothing in that space,,, since base course is usually @ grade, this shouldn't be a huge issue
 
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Old 11-05-14, 05:58 AM
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What is the condition of the sewer line? If it is suspect I would replace at least the section near the wall now, before the wall is built.
 
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Old 11-05-14, 03:56 PM
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The best way to do it would be to sleeve the sewer pipe (put a larger pipe around it under the wall). Unfortunately that can't be done without disassembling the existing pipe. If you're going to replace it because it looks suspect then definitely sleeve it, if not the bridge that stadry suggested is a good way to go.
 
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Old 11-06-14, 10:17 AM
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I did replace it. It was clay pipe and had a slight leak at one of the couplers. I dug up another 10' of line which took me almost back to the sidewalk and had it all replaced by a plumber.

I had considered a bridge. Would a steel plate be better than the concrete? It would be thinner and wouldn't crack.
 
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Old 11-06-14, 11:53 PM
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Steel has a tendency to corrode, which can cause more problems than the one you're trying to solve. Use a half section of larger concrete pipe or even clay pipe--they won't corrode.
 
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Old 11-07-14, 06:14 AM
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bridge's back ! how was the cruise ? you were missed !
 
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Old 11-07-14, 11:21 AM
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FYI, I don't take cruises. In fact, on my meager government pension, I can't even afford a row boat.
 
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