Equation of Fox's depth influence factor

[TX-PE]

thread256-411050

Hi,

I was wondering if anyone has an equation for Fox's depth influence factor that I can use in my program instead of manually looking up the chart. There is a previous thread that I referenced that was closed. Your input on this is much appreciated. Thank you.

 

[jdonville]

Here is a link to ELASTIC SOLUTIONS FOR SOIL AND ROCK MECHANICS by H.G. Poulos and E.H. Davis, 1974

http://research.engr.oregonstate.edu/usucger/PandD/PandD.htm

Many different approaches to elastic stresses due to a dizzying array of loadings.

 

[TX-PE]

Hi jdonville,

Thank you very much for the invaluable information with the link. I will look thru it to see if I can find the Fox equation or try a different approach from the link provided. I suppose if worse comes to worse, I can always manually look up the values and plot a few points to try to curve fit the depth influence factor.

Your information is much appreciated.

 

[Okiryu]

I think that Bowles book has available that equation in his book's CD.... but if you do a google search you will be able to find it.

The program was created on C++ or some similar old programming language. Our IT folks had that language available in their PCs so we could tabulate the values in EXCEL so we reproduced the graph.

 

[TX-PE]

Hi Okiryu,

Thank you very much for your input. I have a copy of Bowles book but no CD. I have not been able to find Fox equation from my google search yet. I will keep trying again. Thanks again.

 

[Okiryu]

Try to run the FFACTOR program from the below link:

http://www4.hcmut.edu.vn/~cnan/BOWLE/Foundation Analysis and Design CDROM. Bowles/EXE/

That is the program for Figure 5-7 of Bowles book.

 

[TX-PE]

Hi Okiryu,

Thank you very much for the valuable information. It is much appreciated.

 

[CarlB]

This article may be of interest-

https://link.springer.com/article/10.1007/s11709-018-0474-6

 

[CarlB]

Here's a copy of the Fox article. I believe I found this from a link a few years back on this site.
The formulas are not too difficult to deal with in Excel, I punched them in today and found agreement with the chart in the article.

 

[TX-PE]

Hi CarlB,

Thank you very much for the Fox article and the related article of interest. It is much appreciated.