Skin Friction for Driven Piles
Skin Friction for Driven Piles
(OP)
Hello,
I am looking into a project that will have driven piles due to the soils (very soft clays). I have a boring and lab test results which include the Unconfined Compressive Strength. This might be great for end bearing, I was wondering if someone could tell me if the following equation is correct for skin friction, and if not, if someone could assist/point me in the right direction.
Qs= alpha*Cuavg*As
where
alpha=adhesion
Cuavg=Avg unconfined compressive strength for length of pile
As= Side Surface Area
Thanks
I am looking into a project that will have driven piles due to the soils (very soft clays). I have a boring and lab test results which include the Unconfined Compressive Strength. This might be great for end bearing, I was wondering if someone could tell me if the following equation is correct for skin friction, and if not, if someone could assist/point me in the right direction.
Qs= alpha*Cuavg*As
where
alpha=adhesion
Cuavg=Avg unconfined compressive strength for length of pile
As= Side Surface Area
Thanks





RE: Skin Friction for Driven Piles
It appears that you do not have a lot of experience with piles in clay. Therefor, you really need to work with someone who as that exerience; such as the project geotechnical engineer.
Mike Lambert
RE: Skin Friction for Driven Piles
@ar9 : equation that you write is alpha method (undrained condition/total stress), for estimate friction method in cohessive soil there is many equation and method like beta and lambda method, you can read text book of soil mechanics and geotechnical engineering about that such as
1. [Braja_M._Das]_Principles_of_Foundation_Engineering_7th Ed_2011, 2. [Atkinson]_Mechanics_Soil_and_Foundations_2nd Ed_2007, 3. [M. J. Tomlinson] Foundation Design and Construction_7th Ed_2001, you can choose what equation that should you use in that book to get the right conclusion,
M.A.
RE: Skin Friction for Driven Piles
RE: Skin Friction for Driven Piles