Page 480 - Trenchless Technology Piping Installation and Inspection

430 App endix D

Protruding: To be projecting outward.

Pull-back force: The tensile load applied to a drill string during the pull
back process. Horizontal directional drilling rigs are generally rated by
their maximum pull-back force.
PVC: Polyvinyl chloride; a form of thermoplastic pipe.
Quality assurance: includes developing inspection and testing methods
to ensure products or services are designed and produced to meet or
exceed owner requirements.
Quality control: includes providing evidence needed (test results) to
establish confidence among all concerned, that quality-related activities
are performed.
Radian: An arc of a circle equal in length to its radius; or the angle at the
center measured by the arc.
Ramming: A percussive hammer is attached to an open-end casing,
which is driven through the ground. See pipe ramming.
Receiving pit: (1) See exit pit. (2) An opening in the earth located at the
expected exit of the cutting head or tunneling machine (TBM). (3) The
pit that is dug at the end of the bore, opposite the jacking pit. Also
target pit.
Receiving shaft: See reception shaft.
Reception or exit shaft or pit: Excavation into which trenchless technology
equipment is driven and recovered following the installation of the
product pipe, conduit, or cable. See receiving pit.
Registered professional engineer: means a person who is registered as a
professional engineer in the state where the work is to be performed.
However, a professional engineer, registered in any state is deemed to be
a “registered professional engineer” when approving designs for
“manufactured protective systems” or “tabulated data” to be used in
interstate commerce.
Rehabilitation: See renewal.

Reinstatement: Method of backfilling, compaction, and resurfacing of
any excavation to restore the original surface and underlying structures
to enable it to perform its original function.
Remote-control system (microtunneling): The remote-control system
monitors and controls the MBTM, the automated transport system, and
the guidance system from a location not in the MTBM.
Renewal: All aspects of rehabilitating, reconstructing, renovating, or
upgrading with a new design life for the performance of existing pipeline
systems.
Renovation: See renewal.