BOOK_CONTENT
From Horizontal Directional Drilling: Utility and Pipeline Applications

1.1 History

The immense task of maintaining and expanding the utility infrastructure around the world is a challenging one. The traditional methods of replacement and repair primarily revolved around open trench construction. These traditional methods often prove to be costly and troublesome, especially with today's congested and buried infrastructure. The high cost of open trench construction is often driven by necessary restoration of roadways, sidewalks, driveways, and landscaping. Other problems often stem from the disruption of traffic and the danger to workers in high traffic areas. To overcome the drawbacks of open trench construction, the government, utility, and construction industries started looking for alternative methods for replacing and repairing the underground infrastructure.

One of the alternative construction methods, and perhaps the fastest-growing technology in the trenchless industry, is horizontal directional drilling (HDD). HDD has experienced rapid growth in the construction industry over the past few decades. The horizontal-directional-drilling process represents a significant improvement over traditional cut-and-cover methods for installing pipelines beneath obstructions, such as roadways, driveways, historical areas, landscaped areas, rivers, streams, and shorelines, which warrant specialized construction attention. To efficiently and properly utilize the many benefits offered by HDD construction, design engineers should have a working knowledge of the HDD process. This knowledge will assist them in developing constructible designs that can be executed in the field while meeting the requirements of the utility company. This book is written for the designers, engineers, and utility company personnel who are involved or interested in HDD construction.

The tools and...

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Products & Services
Horizontal Directional Drilling Machines (HDD)
Horizontal directional drilling machines (HDD) are steerable, trenchless drilling rigs for the installation of pipes, conduits, and cables underground in a shallow arc.
Mining Machines
Mining machines include tunnel boring machines (TBM) and boring rigs, roof bolting rigs, rock crushing vehicles, and other heavy equipment used for tunneling and mine excavation.
Trench Shoring Equipment
Trench shoring equipment includes trench shields and other shoring devices that are used to prevent a dug trench from caving-in on workers or equipment.
Earth Moving and Site Development Services
Earth moving and site development services perform scraping, grading, hauling, compacting, excavation, and other tasks to prepare construction sites and building lots.
Cable Laying Services
Cable laying services install fiber optic cable or copper cable in buildings and office complexes, or over large distances.

Topics of Interest

Overview A HDD project can be a major event, such as a significant water crossing, or a relatively minor one, such as a driveway or road crossing. Regardless of the nature of the HDD project,...

Horizontal Directional Drilling (HDD) is probably the fastest growing technology in the trenchless industry. HDD has gained widespread acceptance in the construction industry over the past decade.

With today's traffic density, it is often inappropriate to close a road and dig a trench to lay cables or gas and water lines, especially if they have to be installed across all lanes. A more...

4.1 HDD Design Basics The planning, design, and construction of HDD projects requires a specialized knowledge of pipeline construction methods and HDD equipment and technology. While Chapter 3...

6.1 General Information Determining the loads and stresses that the product pipe will experience as a result of installation by HDD is an important process and a primary concern for the owners and...