Determining Kp by testing
Determining Kp by testing
(OP)
How would one go about determining Kp for a clayey soil in the lab?
I have old soils lab textbooks (Das) that show how to do a direct shear test on sand? This test (and unit weight)could be done to get the internal angle of friction and from that, you can compute the theoretical Ko, Ka, and Kp.
But that test really doesn't apply to clays? Any suggestions?
I realize that it could be conservative to use Kp=1.0 and the usual range for cohesive soils is between 1 and 2. My question is in how to proove it by testing?
I have old soils lab textbooks (Das) that show how to do a direct shear test on sand? This test (and unit weight)could be done to get the internal angle of friction and from that, you can compute the theoretical Ko, Ka, and Kp.
But that test really doesn't apply to clays? Any suggestions?
I realize that it could be conservative to use Kp=1.0 and the usual range for cohesive soils is between 1 and 2. My question is in how to proove it by testing?





RE: Determining Kp by testing
RE: Determining Kp by testing
I suppose you could test for Kp by pushing a large plate against the side of an even larger volume of soil, but I don't think it would be practical.
RE: Determining Kp by testing
RE: Determining Kp by testing
f-d
¡papá gordo ain’t no madre flaca!
RE: Determining Kp by testing
Undrained strength is a function of cohesion c and unlike granular soil, the passive capacity is finite and a function of the depth of the cut.