circular plate for determining the load-bearing capacity
circular plate for determining the load-bearing capacity
(OP)
Hi! I'm searching information about settlements of load plate test and real shallow foundation relationship. I have found the equation Terzaghi and Peck (1.967) but I think this equation isn't accurate. I haven't found other equation.
Anybody can help me?
Anybody can help me?





RE: circular plate for determining the load-bearing capacity
RE: circular plate for determining the load-bearing capacity
Most of the leaders of Geotech profession (Terzaghi, Peck, Sowers, et al) were quite comfortable with the concept and result of plate load tests (yes, you have to understand their limitations and work within them!).
It is the closest thing you'll get to a full scale foundation test.
RE: circular plate for determining the load-bearing capacity
PLTs aren't the closest thing to a full scale load test - I've run a few of full scale load tests before on partially instrumented drilled piers, and loaded them to plunging failure. (Up to 24 inch diameter, 80 ft embedded length - pushed over 7 inches into the ground...) You can get close to this on other foundation types by instrumenting structures for load, and getting a series of third order level surveys of the tops of the foundations during key points during and after construction. ( + 0.001 foot with a closure error of less than 0.004 foot.) Clients will pay for it when they see a benefit.
Frankly, we have enough fancy analytical methods and computer simulations - what we need is more field performance data.
P.S. I "borrowed" the immediately preceding sentence from Ralph Peck; he said it about the time I was born!
RE: circular plate for determining the load-bearing capacity
RE: circular plate for determining the load-bearing capacity
Note: PLT = point load test
RE: circular plate for determining the load-bearing capacity
The plate load test has, essentially, two functions:
1) For help in assessing the bearing capacity at the surface or foundation bearing level
2) To assess the modulus of subgrade reaction for pavement applications
It is not a predictor of overall foundation performance, though it is a fair representation of a bearing condition at the location of the test, if the test is properly run. It isn't as easy to do correctly as it would first appear and certainly not as easy as the textbook schematics would imply! One must be careful about the interpretation of the data when considering settlement and geotech parameters other than bearing at that location. As BigH noted, the plate load test should not be substituted for boring data....they are complementary processes. Further, in highly stratified near-surface soils, bearing capacity and settlement can be more closely related than in conditions where the soil is more consistent through the 2B range(or deeper in some cases).
RE: circular plate for determining the load-bearing capacity
I want different correlations equations but I can decide. Do you understand me??
Thank everybody