What equation is permissible for a timber piling moment of inertia? Both for round and square tips. I am using (pi/4)(.5)(Dia)^4 for round tips, and (bh^3)/12 for square tips.
McCoy- As I understand it, phi = angle of internal friction, and 'c'= cohesion? Out here the cohesion value is zero, so I really have no reason to use that. It seems weird how the material isnt taken into account more. I am thinking I need one more factor based on the material to include in...
Thanks for your response, and I mean Ka and Kp. I think at this point I've accepted conservative values based on FEMA's standards for earth pressure coefficients that are usable in their formula for embedment depth, and since I am using their formula, then I figured I would stick within their...
I am trying to calculate the lateral earth pressure coefficients for piles. I have been looking at several different methods for calculating this number, but ideally I want to incorporate the angle of internal friction, the type of soil in which the pile is being placed, AND the type of material...
Okay guys (or girls), this is where I am having difficulty: calculating earth pressure coefficients. I found what I was looking for on FEMA's website, but I need something better to get my earth pressure coefficients. Glad I have some Geotechnical folks involved in this thread. Any help is much...
Thanks for all the responses in this thread. This is at best going to be a rough estimate of how deep these pilings should go, and isn't applicable to the final design. It hopefully gives the contractors a better direction than just a mere guess from past estimates in the same area. We also...
Update: I realize now what the engineer here was telling me in regards to neglecting the shaft resistance (skin friction). Basically, we are looking for a really conservative figure on this thing, so if you assume that the toe resistance (end bearing capacity) is the only thing carrying any of...
Big H,
Thank you for your response. When I come up with something on this I will post in here, and maybe you can take a quick glance at it. I'll take a look at your links.
Oldestguy,
Thank you for your response, and ideally I would like to use the skin friction variable in the calculation. So if you do have a method including Fs, then I am okay with it. Yes, that all makes sense, but remember this is usually all done in quartz dominated sand off the shores of...
Oh, and I must add that I have been told that I can neglect skin friction on this calculation. Not entirely sure the impact of doing so, and maybe someone could shed some light on how that effects the Meyerhof formula. Thanks again.
I am an engineering intern assigned the task of creating a spreadsheet that calculates how deep to drive timber pilings for deep foundations and I was looking for some help on the best way to go about doing this. My goal is the spreadsheet spits out the depth after several variable inputs. The...
