Page 13 - Buried Pipe Design

Preface

In American cities, piping systems are complex and marvelous. But
the average city dweller does not know of, and could not care less
about, buried pipes and simply takes them for granted. This person
could not contemplate the consequences if these services were to be
disrupted. City managers and pipeline engineers are sobered by the
present-day reality of deteriorating pipe systems. The problem is
almost overwhelming. Engineers who deal with piping systems will
be key in helping to solve this problem. The first edition (1990) and
the second edition (2001) of this book were both well received and
hopefully have been of some help to the various practitioners who
deal with buried piping systems. We also hope that the third edition
(2008) will be helpful in designing, installing, replacing, and reha-
bilitating buried pipe systems.
There has been progress and some changes in the 7 years since the
second edition was published. There have been some additions in this
new edition; however, most of the material that appeared in the second
edition is also included here. In addition, there have been minor changes
such as corrections of the errors pointed out by readers. Most of these
errors were typesetting errors in equations. Our sincere thanks to read-
ers for their help.
Dr. Steven L. Folkman, associate professor of mechanical and aero-
space engineering has coauthored this edition. He is an expert in finite
element analysis.
Following is a list of the subjects covered in each chapter, with special
mention of new material:
Chapter 1, Introduction and Overview. This chapter remains
unchanged.
Chapter 2, External Loads. Methods are given for the determina-
tion of loads that are imposed on buried pipes, along with the various
factors that contribute to these loads. Also included are discussions on
minimum soil cover, similitude, soil subsidence, load due to tempera-
ture rise, seismic loads, and flotation.

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