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Trenchless Technology, Published by Benjamin Media, April 2010, pg. 74

Author:
Dennis J. Doherty, P.E., F.ASCE, Senior Trenchless Technology Engineer, Haley & Aldrich.

Abstract:

Underground construction work has inherent risk, no matter what construction method is employed. Trenchless installation methods have additional risk because of limited access to the equipment while being deployed. For example, limited face access to microtunneling machines or no access to drill heads on long waterway crossings.

These risks include lost production or even lost equipment caused by unforeseen conditions, damage to other utilities and nearby structures due to ground movement, or worse, property damage and or loss of life. In addition to the subsurface risk, there are risks with construction impacts to surface activities caused by inappropriate work zone locations.

There are several methods for minimizing and managing risks associated with the installation of new pipes using a trenchless technology method. These are best addressed during the planning and design process.

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