soil liquefaction evaluation
soil liquefaction evaluation
(OP)
i have to do a study about soil liquefaction, and within that work I need to use the so called chinese criteria. is there someone who actually used these criteria. As a matter of fact my question is What could be the mmeaning of "liquid limit". I guess that's a common term, frequently used in geotechnical language, but till now i didn't find its meaning. Thanks for your patience.
kope
kope





RE: soil liquefaction evaluation
Perhaps a more useful relationship is:
PI=LL-PL
Where PI is the Plasticity Index, LL is the liquid limit, and PL is the Plastic limit.
Values of LL vary from 25 to 100 typically but can be larger.
Back to liquefaction, the following factors affect liquefaction characteristics and may be found in Prakash's Soil Dynamics:
Grain size distribution of sand
density of deposit (initial relative density, Dr)
vibration characteristics
location of drainage and dimensions of deposit
magnitude and nature of superimposed loads
method of soil formation
period under sustained load
previous strain history
entrapped air
RE: soil liquefaction evaluation
RE: soil liquefaction evaluation
(1) The clay content (particles smaller than 5micro) is less than 15 percent, by weight.
(2) The liquid limit is less than 35% percent.
(3) The natural moisture content is less than 0.9 times the liquid limit.
Now, as you can see, I don't think that the liquid limit, in this context, has a diferent meaning than the one specified by qshake. It is refered strictly as a geotechnical soil property, not as an ad-hoc term defined especially within liquefaction susceptibility. Although, kam's asummption was not bad at all; liquid limit in terms of liquefaction could be a matter of common sense, regards liquefiable soils. The liquefaction potential is well-binded by the meaning of LL.
Thanks a lot!! both of you for your time and answers.