Helical Piles - A Practical Guide to Design and Installation







Preface

Helical piles have been used in construction for over 200 years. Today, there are over

50 helical pile manufacturing companies in at least twelve countries on four continents.

There may be more than 2,000 helical pile installation contractors in the United States

alone.

In the past, helical piles were an interesting alternative that some geotechnical

engineers would take into consideration in special cases. Fifteen years ago, helical piles

were barely mentioned in undergraduate and graduate civil engineering studies. Now

helical piles are well known by most practicing engineers and should be considered

an essential part of any graduate course in foundation engineering. Helical piles have

gained in popularity to the extent that they are used more frequently than other deep

foundations in some geographic locations. Even owners and developers are beginning

to request helical piles.

At the time of this writing, an average of 1,500 people per week visit the trade Web

site . Over 100 technical papers and numerous articles have

been written about helical piles. There are 163 U.S. patents pertaining to helical piles.

The Helical Foundations and Tie-Backs committee of the Deep Foundation Institute

(DFI), a professional trade organization, formed in 2001 and has been one of the

largest DFI committees.

Helical piles were adopted into the International Building Code in 2009. Helical

piles most certainly have a bright future in geotechnical engineering and foundations

construction. Yet most of the information about these systems is contained in proprietary

manuals published by helical pile manufacturing companies. An unbiased and

universally applicable text dedicated to the design and installation of helical piles is

needed to compile the current state of knowledge and practice in the industry. The

goal of this book is to satisfy that need.



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