Page 17 - Trenchless Technology Piping Installation and Inspection

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Chapter 2 focuses on existing pipeline renewal and replacement
methods. It includes planning and design process, method appli-
cability, and descriptions of different renewal and replacement
methods. To help with planning and method selection process, this
chapter includes decision support systems for both gravity and
pressure pipeline systems. This chapter concludes with an overview
of emerging design concepts, and presents detailed design calcula-
tions for partially deteriorated and fully deteriorated pipes and pro-
vides sample technical specifications.
Due to emerging importance of water conservation and quality
of service to customers, Chap. 3 is dedicated to spray-on coatings
and linings for potable water pipe renewals. Such topics as method
selection criteria, site investigation requirements, pipe inspection
requirements, installation considerations, quality control, and project
closeout requirements are covered in this chapter. In conclusion,
descriptions of four common spray-on linings and coating materials,
namely, cement mortar, epoxy, polyurea, and polyurethane are
described and compared.
Chapter 4 covers one of the most important topics in pipeline
installation and inspection, namely, the pipe-soil interactions. To
present a better understanding of the concept, a comparison of open-
cut and trenchless installation is provided in this chapter. Other
important topics, such as the concept of flexible and rigid pipe as well
as common methods of pipe failures are included in detail. This chapter
continues with pipe selection considerations for cement-based pipes,
asbestos-cement pipes, vitrified clay, plastic pipes, glass-reinforced
pipes, and metallic pipes. For each pipe type, manufacturing process,
applicable standards, joint types, and advantages and limitations are
presented.
Due to the importance of the horizontal directional drilling (HDD)
method of pipe installation, Chap. 5 is devoted to this method. The
topics included are method descriptions for large, medium, and small
(Maxi, Midi, and Mini) methods of HDD, site investigation require-
ments, drilling operations, drilled path design, drilling fluids, instal-
lation loads, contractual considerations, inspection and construction
monitoring. To present an understanding of concepts and parameters
involved in design of HDD projects, at the conclusion of the chapter,
a simplified bore planning and pipe load calculation for use of high-
density polyethylene pipe (HDPE) for Mini-HDD projects is provided.
Similar concepts can be developed for larger size HDD projects and
different pipe materials.
Chapter 6 presents a full coverage of pipe replacement method
which is another growing application for trenchless technology. The
main branch of pipe replacement is pipe bursting, which is covered
in great detail. The topics presented include design considerations,
investigation of existing pipe and site conditions, geotechnical inves-
tigation requirements, risk assessment plan, ground movements, plans