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| Title: |
Soil reaction force at the head of the pipeline during the pull-back operation of horizontal directional drilling |
| Category: |
Technical papers from the Journal of Pipeline Engineering
|
| Downloadable: |
Yes  |
| Project No.: |
|
| Research
Agency: |
|
| Catalog No.: |
2178s |
| Date
of Publication: |
Sep 1 2009 12:00AM |
| Price: |
$25.00
|
| Authors: |
J P Pruiksma, H J Brink, H M G Kruse, and J Spiekhout |
| Abstract: |
THE SUCCESS OF A horizontal-directional drilling (HDD) project is largely dependent on the success of the pull-back operation, when the product pipe is installed in the created borehole. For global design purposes and global engineering practice, a calculation method is available in the Dutch standard. This is a quick and relatively simple method for the calculation of the distribution of normal forces between the pipeline and the borehole wall, and gives a reasonable estimate of the maximum pull-back force. The reason for possible pulling problems, however, cannot be explained with this method. Therefore knowledge of the behaviour of the head of the pipeline at the connection with the pull-back equipment is required.
This behaviour was investigated using a pull-back model based on the finite-element code ABAQUS. Since the model calculations consume a considerable amount of time, the results are compared with analytical solutions. It is observed for which situations analytical solutions can be used to calculate the soil reaction force relatively quickly. Forces on the coating and borehole wall penetrations during the pull-back operation can therefore be assessed relatively easy.
Further research into this subject from members of the same team of authors, plus others, and titled Horizontal directional drilling – the influence of uplift and downlift during the pull-back operation of the steel pipeline string, will be published in the Fourth Quarter, 2009, issue of the Journal of Pipeline Engineering.
References
1. H.M.G.Kruse and H.J.Brink, 2007. Soil related risks during the pull back operation of horizontal directional drilling. Int. No-Dig conf., Rome.
2. P.P.T.Litjens and H.J.A.M.Hergarden, 2001. A calculation method to determine pulling forces in a pipeline during installation with horizontal directional drilling. Von der production zur service Schrift (Schriftenreihe aus dem institut for Rohrleitungsbau Oldenburg).
3a. M.Hetényi, 1946. Beams on elastic foundations. University of Michigan, equation 6a, page 14.
3b. Idem, equation 20a, page 25.
4. Requirements for pipeline installation, 2003. Dutch Standard ICS 23.040.10, NEN Delft.
5. H.J.Brink, H.M.G.Kruse, H.Luebbers, H.J.A.M.Hergarden, and J.Spiekhout. Design guidelines for the bending radius for large diameter HDD. Journal of Pipeline Engineering, 6, 4.
6. J.P.Pruiksma and H.M.G.Kruse, 2008. Soil pipeline interaction during the pull back operation of horizontal directional drilling. Int. No-Dig conf., Moscow.
7. Idem, 2009. Modelling the soil pipeline interaction during the pull back operation of horizontal directional drilling. Publication CT-221, Centre for Underground Construction, Gouda, Netherlands. |
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