geotechguy1
Civil/Environmental
- Oct 23, 2009
- 667
Does anyone know of guidance or research publications on deriving t-z / q-z curves for static analysis by hand.
For example, API-RP-2GEO and API-RP-2A-WS present essentially bi-linear (or quadrilinear I guess if you count the strain-softening part of the curves) spring (t-z/Q-z) curve formulations for piles in sand and clay which you can construct as a hand calc or in a spreadsheet without software.
Fellenius presents a compendium of t-z/q-z functions in the Red Book and some of his research papers (Gwizdala function, Hyperbolic function, Vander Veen function, 80% function, Zhang-Zhang, Vijayvergiya, and Rahman functions) however only uses them for back-analysis / curve fitting with static pile load test results. Is there any guidance or empirical literature on fitting parameters to use for those t-z / q-z functions for a static design analysis in the absence of load test to fit the results to?
I'm sure this must exist because some of the software packages like RSPile and APile etc can do static design with t-z/q-z functions so they must have curve fitting parameters from somewhere built in.
For example, API-RP-2GEO and API-RP-2A-WS present essentially bi-linear (or quadrilinear I guess if you count the strain-softening part of the curves) spring (t-z/Q-z) curve formulations for piles in sand and clay which you can construct as a hand calc or in a spreadsheet without software.
Fellenius presents a compendium of t-z/q-z functions in the Red Book and some of his research papers (Gwizdala function, Hyperbolic function, Vander Veen function, 80% function, Zhang-Zhang, Vijayvergiya, and Rahman functions) however only uses them for back-analysis / curve fitting with static pile load test results. Is there any guidance or empirical literature on fitting parameters to use for those t-z / q-z functions for a static design analysis in the absence of load test to fit the results to?
I'm sure this must exist because some of the software packages like RSPile and APile etc can do static design with t-z/q-z functions so they must have curve fitting parameters from somewhere built in.
