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Again, it's possible, but without knowing anything about the soils or the slab you're shooting through, that's the best guess I can give you from my home office. If it does work, you could see where the foundations start and stop as well as how thick they are. I'd assume that would give you an...

Long-story short, yes, you can do GPR on the slab to try and identify buried foundations (as well as pipes, barrels, graves, etc...). Now the effectiveness will be based on factors sch as how much reinforcement there is, what are the subgrade soils, moisture content, etc... For example, if...

thread261-429664 I came across the above thread looking for something else and since it wasn't discussed, thought I'd mention it for those interestted. Illinoid DOT (IDOT) here int he US uses what they call a Rimac devise in the field to dp exactly this, perform a UCS of sorts on SPT samples...

Really need a sanity check here. Have a project in the Florida panhandle and encountered some fat clays. Review of available maps don't indicate this particular area to be prone to high swelling so wasn't expecting too many issues (but that's why we exist I guess). However, I just got back...

I had actually been looking for this same answer, or at least a better answer then do a flow net. (I seem to recall doing one of those back in college). DM 7.2 is very vague in what to do with minimum sheet pile embedment when excavating in soft to medium stiff clays. The reference above to...

Coincidentally, we are located in the St. Louis area as well and can perform this testing. I'd be interested in where the project is located and what exactly you are looking for in terms of scope. Should take this off board but short of putting up my email here (which I believe they frown upon)...

dgillette, Thanks for the comments and clarification. They are there now, so we'll see what info they can bring back. I'm planning on going on the next trip so we'll make due with what we can.

Just curious if there were any colleagues from Honduras that frequented the site. My chapter of Engineers Without Borders is working on a channel crossing project in a remote town near San Pedro Sula. I am not able to travel with the group next week for a site visit and they will be without a...

Thanks for the responses, I guess I should clarify a couple things. We are concerned with the failure of the foundation soils which are predominantly soft clays, so bearing capacity type failures and maybe even mudwaving may be something to be concerned with. Slope stability analysis has been...

I was wondering if anyone knew of a guideline or Spec that sets an allowable amount of pore water pressure generation during embankment construction as read with VW piezometers. In other words, we would want to set an upper bound during filling of XX% of the effective overburden to prevent the...

Personally I use lpile and it should give you the model you are looking for. This is mainly because that's what I'm used to using. In reality you probably can't go wrong using either one. As for input values, under the HELP section in the Lpile program you can look at typical value ranges for...

I'm looking for any recent (or anything really) load test data, preferably with load distribution information for what I've usually seen referred to drilled or bored piles (not drilled shafts). I've seen a couple DOT's use these on bridge projects where relatively shallow rock is encountered...