I agree with born2drill. Soil Nails or permanent soldier piles. You might leave it to a design build contractor though. Depending on where you are a local contractor of one kind or another might have significantly lower mobilization costs. It's a small wall, leave it up to the market...
Not enough info. Obviously there's nothing near it. How many pipes are you laying into it and what are you doing for them? Did you consider a trench box?
I agree with ladysueg, borrow should be measured by before and after cross sections. You have to watch out that the contractor doesn't fatten up slopes though to increase his borrow quantity.
Borrow is typically at about 80% compaction (std proctor). If you are specifying 95%, you will 95 m^3 of borrow per 80 m^3 of fill. There is also haul density, generally around 60% to 70%. The math is the math - it's the easy part. The tough part is figuring out how much shrink you will have.
Depends on the silt... One concern is why do you have 8 acres of silt? Is there degradation of the land upstream, like cleared for farming?
That's where silt goes, eventually, the ocean... The question might be posed "how far out" vs. "can we".
It depends, like oldest guy insinuates, on what's underneath.
However, I disagree on the seal coat comment. I think one of the best ways to encapsulate volatiles and promote longevity in AC pavement is a seal coat of some sort. Chip seal works the best, but an impermeable layer of some sort...
Problem C: Sounds like the foreman was blowing smoke.
Problem B: I don't think they have 172 feet.
Problem A: This thread was partially hijacked. tzirby - you should link to your new thread and not use this one anymore.
Are they driving on it now and warning it *will* go bad, or did they just look at it, or what? I presume it's crushed rock. Has it been rolled well, or will there be a roller around when the ruts might start showing up?
Any HMA going down anywhere close by?
It's hard to really say without knowing the groundwater etc. situation. The clean 3/4" to 1" rock should definitely be crushed so it locks together though.
Are you saying the section you are having a problem with is 8" and the one you're looking at is 26"? What is the gradation? Just saying 2" minus doesn't mean it's stable. Could be that's all that was spec'ed and the contractor put a lot of unsuitable material in with a little gravel. You...
soiledup put it succinctly - if there were unknown conditions the Owner could have foreseen with reasonable investigation, you may be entitled to extended overhead, along with the excusable delay. Remember, he had much longer to investigate the underground conditions than you had to bid the...
