Design cantilever retaining wall on pile foundation

[Seismicwave]

Good morning to you all,

I am an undergrad that need a little help, I been asked at work to design a cantilever Retaining wall supported by a grade beam on a pile foundation.
I have to design the retaining wall, the grade beam and the pile (friction type)
If you can provide me with resources, and design examples that would be awesome.


much appreciated.

 

[msquared48]

Is this a project for school?

Mike McCann
MMC Engineering

 

[Seismicwave]

Nope, It's an internship, testing our skills, from somehow it seems to me as a challenge, I haven't design such a thing before.

 

[SteelPE]

Last time I had to do one of these I looked in a book. You might want to start there. If I remember correctly, it wasn't terribly difficult but then again.... maybe I did it wrong.

 

[msquared48]

Nothing overly complicated about it.

Just design your retaining wall and find out the net overturning moment per foot to the grade beams, to include the lateral forces, then just design the grade beam and pile system to resist them based on the lever arm created by the grade beams to get the forces, and position the pile to resist the reactions generated by the grade beams. You will probably need to include batter pile too. Don't forget your load factors...

Mike McCann
MMC Engineering

 

[bridgebuster]

It's supposed to be a challenge. Maybe if you get it right, or at least show some ability, they'll offer you a job one day. Don't be afraid to put out into the deep water.if you want to be an engineer learn how to break your teeth now. I hate to say it but it seems when young people can't tell a computer what to do, and have to do some thinking, they fall apart.

 

[TXStructural]

I'd say "free body diagram a cross section" and design as for any structure. Since you don't have the complication of the soil interaction under the footing, the structure is simply a set of beams. If you have access to a CRSI Design Handbook or Williams' SERM, (or most other concrete design texts) determining the soil loads are fairly straight forward.

The lateral loading of the piles is a bit more complicated (to resist the lateral sliding.) The publishers of L-Pile software did have a good explanation on the web of how to calc laterally-loaded piles.

 

[Seismicwave]

Alright , Thanks for the info. & the advices, well after I did some research yesterday, I found out a very useful book " Foundation Design by Coduto ".
TXStructural, am start thinking about it as a beam column connections.
msquared48 am thinking to do two leverarms, one to the grade beam and anther one straight to the pile, well after I finish the calcs. I ll post it online to verify it.

Thanks again for your contributions.

 

[Seismicwave]

Alright , Thanks for the info. & the advices, well after I did some research yesterday, I found out a very useful book " Foundation Design by Coduto ".
TXStructural, am start thinking about it as a beam column connections.
msquared48 am thinking to do two leverarms, one to the grade beam and anther one straight to the pile, well after I finish the calcs. I ll post it online to verify it.

Thanks again for your contributions.

Michael.G