Pwp dissipation using CPT
Pwp dissipation using CPT
(OP)
Engineers,
I have a question about the cpt.
I have worked in central florida, USA, for few years and noticed that projects involving CPT it is not required to perform PWP dissipation.
On the other hand, i have worked in few other projects like in Mexico and noticed that the engineer in charged does require pwp dissipation.
My question is: is it mandatory to run pwp dissipation or not?. At least the projects in mexico are dry stack embankments (silt), so i guess the pwp dissipation is useful for predicting consolidation ratio. But in FL, everything is pretty much sand, so i guess pwp dissipation is not needed as sands do not hold water pressures.
Please correct me if i am wrong.
Thanks.
I have a question about the cpt.
I have worked in central florida, USA, for few years and noticed that projects involving CPT it is not required to perform PWP dissipation.
On the other hand, i have worked in few other projects like in Mexico and noticed that the engineer in charged does require pwp dissipation.
My question is: is it mandatory to run pwp dissipation or not?. At least the projects in mexico are dry stack embankments (silt), so i guess the pwp dissipation is useful for predicting consolidation ratio. But in FL, everything is pretty much sand, so i guess pwp dissipation is not needed as sands do not hold water pressures.
Please correct me if i am wrong.
Thanks.





RE: Pwp dissipation using CPT
RE: Pwp dissipation using CPT
For the clay layer is required if you need the time consolidation, cv but you have to read till the pwp disappear.
RE: Pwp dissipation using CPT
Also, the parameters from the CPT dissipation test are horizontal rather than vertical, i.e. you get ch, not cv.
RE: Pwp dissipation using CPT
RE: Pwp dissipation using CPT
L0k, specifically what value do i get from CPT dissipation for liquefaction analyses?, I have never seen that before.
Please let me know,
Thanks
RE: Pwp dissipation using CPT
I've spent today looking over CPTu data on a PVD job (the embankment is constructed). We still have excess pore pressures. I guess the consolidation and strength gain are not complete.
f-d
ípapß gordo ainÆt no madre flaca!
RE: Pwp dissipation using CPT
This is the pore pressure data I use for liquefaction analysis.
RE: Pwp dissipation using CPT