I am so thrilled to receive so many responses from all different aspects and I would like to thank you all! I am at northetn California and it has almost been a standard practice now (for jobs need soil report) to require remove and recompact soil minimum 2 feet below new footing. Last time I...
Guessing contractors finally tired of remove and re-compaction below footing and due to design-build approach, contractors propose using steel posts driven by pneumatic hammer below the shallow foundation. I read through the threads that the steel posts (or mini piles) are to be driven to...
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This was a very interesting subject. Please correct me if I am wrong, if the soil report said allowable soil bearing is 1,500 psf (assuming it is the maximum allowable value. unclear that if any special foundation preparations are needed) for footing founded between 0-10 feet...
Thanks to all your valuable inputs: "oldestguy" suggestion- "get that front end loader out of there". "Ron" always provides detail suggestions: increase lift thickness and drying method did work before. I did experience conditions described by "fattdad", and the lift 3 was the most expensive...
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This is a very interesting subject. Not too many books discuss about identifying and/or dealing with "pumping" of subgrade soils, as well as the technical reason(s) of the phenomenon (may be excessive pore pressure, particular soil grain, or pumping soils situated over dense...
Thank you Vulcanhammer. However, each time I saw soils settle on surface around the H-pile/sheetpiles for shoring installed by vibratory hammer. Somehow they give me the impression that impact hammer and vibratory hammer at certain degree may not simply comparable.
Is there any studies by FHWA...
Thanks BigHarvey!
Vertical is not only major player. Now there are also installation speed (there 200+), lateral, and uplift from wind load now. So we are really looking into some alternatives....
Any comments, any hydraulic hammer can drive downward only you can suggest?
Thank you!
Instead of installed caisson per plan, the contractor proposed alternatives to install steel H-piles. What's more, they dont want to bring large enough crane with hammer. They have been fighting with us stating that these H-piles can be installed by their vibratory hammer mounted on their...
Dear Professional, may I ask what is the differential settlement deflection value with an associated span such as 1/2" over a 40-50 linear-foot span.
Is this derived from calculation fro lab data? Our office derive it from the NAVFAC figure...
I was told that this is also based on building...
