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Hello, I have recently been approached by a client to provide electrical resistivity testing across an in-tact length of 2-inch rock core. I am not familiar with this procedure. Does anybody know of any standard for this type of testing? Thank you in advance for any information.

Thanks for the input everyone. My curiousity was sparked by a discussion in the office about a permanent soldier pile and lagging wall we did construction observation for (northeast US). The wall was tied back into the retained silty till soils, and finished with a shotcrete facing. There was...

All, Looking to increase my knowledge of frost action, especially in terms of how frost behaves and propagates horizontally. It seems as though the growth of ice lenses is usually explained as behaving predominantly vertically through capillary action in frost susceptible soils, resulting in...

Have any test borings been performed through the body of fill?

Make no mistake about it, you are certainly dealing with some significant structures with significant loads. As a field engineer, you are the eyes and ears of the designers. You have an obligation to make sure their design is being properly implemented AND you have the obligation to report when...

Are the native site soils also clay? Suspect this could turn into a bathtub relatively quickly without some drainage help. Might try getting up out of the water with a layer of crushed stone wrapped in geotextile filter, then build up from there. Typically a situation more suited for a clean...

I am working on a large site with several proposed new single story buildings and roadways. Construction will be phased in conjunction with keeping existing buildings (several of which are within footprint of proposed structures) on site open. Native soils consist of dense to very dense glacial...

kslee: My aplogies if I came across as being arrogant or sounding I could do better than the structural. What I meant is that perhaps the situation could have been discussed further with all parties involved to identify the fact that a fairly lightly loaded pile could likely achieve capacity...

Thank you all for your commentary so far. Some more info and a few answers to your questions: The contractor is being paid by driven length, that is footage in place and won't be reimubursed for cut off footage. Cast driving tips were welded to the pile tips. The contractor first vibrated the...

I recently monitored pile driving for two small bridge abutments. The piles were end bearing, relatively small (steel HP 10x42) and lightly loaded (to be dynamically tested to 100 kips). Our test borings identified 10 feet of fill/organic silt over 10 feet of stiff clay over 20 feet of very...

Often times drive shoes or tips are utilized on end bearing piles to prevent piles from "walking" when being driven. That is, if the bedrock surface is fairly sloped, the pile won't seat well and will skid down the rock slope before getting appropriate set counts. Shoes can help give more bite...

You may want to look at temporary construction loading of the retained side of your wall. What type of equipment and associated loads will be applied as your parking/traffic area is constructed? In my experience, 250 psf is typical for general auto loading, in which case I would apply even if...

Hello: I have been playing around with an old fulcrum/lever arm style consolidation frame (Soiltest C-280) with floating ring setup. In discussion with colleagues who have (historically) used the same setup, they mention the use of a 1 inch calibrated steel block placed between the porous...

Fattdad and others, Could you comment on any concerns you would have with settlement within the actual fill mass in a situation like this? When looking at elastic settlement of the underlying sands, what parameters and approach would you use in your model of a mass fill area, as the original...