References for laterally loaded pole foundation 4

[samdamon]

Anyone know a good textbook reference for laterally loaded pole foundations? I am talking about a single pole with a single cast-in-place or driven steel pile below it. Pole height 20 to 40 feet high, subject to wind loads. No other unusual loads.

Have an old refernce that uses the friction angle of the soil to calculate a passive resistance of subgrade to pole forces. However, am searching for a technical book with more data. Any help appreciated.

 

[Qshake]

The industry standard for this type of application is the AASHTO Standard Specifications for Structural Supports of Highway Signs, Luminares, and Traffic Signals. This reference has much information including nomographs for foundation analysis and design and pole design.

Check out:

http://www.transportation.org

 

[samdamon]

Oshake-

I have that reference. It is very detailed on how to find the wind loads on tyhe pole, but less so on designing the foundations. I need to know more about the theoretical basis of the embedment nomograph (It doesn't make sense to me, frankly).

Are there any other texts out there that you know about that consider this topic?

 

[JedClampett]

"Wood Engineering" by German Gurfinkel (1973 Edition), Section 11.6, has a discussion that seems to approach this with a somewhat analytical approach. I'm sure it's out of print but maybe one of the oldtimers (or you, if you're an oldtimer) has a copy.

 

[wiktor]

Try "Pile Foundations in Engineering Practice" by Prakash. ISBN 0-471-61653-2.
Chapter 6 of this book presents procedures for the design of the laterally loaded pile(s)and has design examples.

 

[RiBeneke]

There are 2 specialist theories regarding lateral capacity of piles.

1) Prof Bengt Broms has published formulas based on phi and c, and they give higher values than the Rankine (Bell) formulas for lateral passive pressure because they are specifically for piles. The pressures may be 1.5 x the Rankine values.
You can find a good description of these formulas in USA Corps Engineers Manual 'Bearing Capacity of Soils EM 1110-1-1905' which is available on the internet.

2) The Brinsch-Hansen formulas rely on more detailed knowledge of the soil properties and require more sophisticated analysis methods. You can find out more about this method if you do an internet search for the COM624 software package and for research done by Mokwa.

 

[Escher]

Try "Design of Laterally Loaded Piles" CIRIA Report 103 UDC 624.131.531.6. It gives a comparative evaluation of various methods including estimation of displacement. I guess your application is for short relatively lightly loaded piles.

Pile Foundation Analysis & Design Poulos & Davis has a good section also.

 

[DaveVikingPE]

Structural Engineering Handbook, by Gaylord and Gaylord, has a pretty useful figure (nomograph, with formulae) on page 7-49, 4th ed. So useful, in fact, that I figured it was worth the price of the book!

The section of chapter 7 ("Retaining Structures and Foundations&quot is entitled "Lateral Stability of Poles."

 

[vmirat]

Section 1806.8 of the 1997 Uniform Building Code has formulas that can be used for posts. These formulas are similar to the ones used in Gaylord and Gaylord's book mentioned above.

 

[mtroche]

I have the same problem that you have but for a power concrete pole foundation and there is a book that should be the reference that you are searching for. Check out the following book: "Foundation Design, Principles and Practices", Donald P. Coduto, PE, GE, Prentice Hall. In this book, look in chapter #17 called "Laterally Loaded Deep Foundations". This chapter deals with what you exactly are searching for: foundations with axial and moments or lateral forces; just apply the information and formulas that you will find here to the pole foundation. In this chapter you will find formulas dealing with diferent kind of soils like cohesive and cohesionless soils. I hope this information is not so late for you.

 

[100islands]

Try reading 'Flexural Strength and Ductility of Extende Pile-Shafts' (I & II) by Chai and Hutchinson; Journal of Structural Engineering May 2002. Theories in the articles may help you.