Consolidation over time 2

[akawd40]

After calculating the total settlement of a site I have completely forgoten how to calculate the time this will take, I have the CV50 and CV90 numbers from the lab testing can any one shed some light.

 

[BigH]

Why don't you just look in one of the myriad number of geotechnical textbooks . . .

 

[akawd40]

Does any one have an answer slightly more useful that BigH's though I am aware that it is pretty dam difficult to come up with a less useful answer. I mean even "have you tried using magic" would have been slightly more constructive and made you look less like you didnt know the answer.

 

[moe333]

I think BigH's reply was meant to tell you that your question relates to one of the most basic and common topics in any geotech. text. You should spend a little time reading one of the texts rather than asking someone to rehash it for you. If there are some nuances you want to have peoples opinions on then that would be a reasonable question (IMO).

 

[dgillette]

A textbook (or quite likely something you can find using Google or maybe even Wikipedia), with diagrams and all the equations written out, would be far more effective than anything that could be written by any of us in any reasonable amount of time. I don't think BigH's answer is at all inappropriate - in fact, recommending a textbook is the only answer that makes sense. One might legitimately think it's the QUESTION that is lazy.

 

[fattdad]

for a given increment of load at the instant of load application the pressure will be supported by water pressure. The relief of such water pressure is dependent on the hydraulic conductivity and gradient. The former is a constant and the latter is variable throughout the soil mass.

The solution of this problem will give you the time frame for consolidation.

I know what i'm talking about.

So does BigH.

You should read a textbook, which may or may not derive the equations, but will give them to you, if you are patient enough to actually read the text.

You should also get Cv for the increment of loading that you are actually going to endure in the field - i.e., Cv for the pre-consolidated portion of loading is typically much different than the Cv for the virgin portion of loading.

f-d

¡papá gordo ain’t no madre flaca!

 

[BigHarvey]

akawd40, have you tried using magic ? Who knows !

 

[jgailla]

Consolidation is one of the very few things I remember learning in college textbooks that was the exact same doing actual engineering.

Everything else is based on the theories in the textbooks, but couldn't be directly solved by a textbook equation.