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Displaying records 530 through 530 of 2180
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Title: Design guidelines for the bending radius for large-diameter HDD
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Catalog No.: 2123s
Date of Publication: December, 2007
Price: $25.00 US
Authors: Ir H J Brink, Dr H M G Kruse, Dipl-Ing H L├╝bbers, Ir H J A M Hergarden, and Ir J Spiekhout
Abstract: AN IMPORTANT parameter in the design of a crossing by means of horizontal directional drilling (HDD) is the bending radius. A new formula has been developed for calculating this bending radius, taking into account the stiffness of the pipe in relation to the soil reaction pressure during the pull-back operation. This formula can be considered as an extension to the rev. 2 DCA guidelines formula. In the DCA guidelines, the magnitude of the bending radius is merely related to the diameter of the pipe, while in the new formula the influence of the wall thickness on the bending stiffness of the pipe is also taken into account.
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