Design and Manufacturing Loading Rig Machine for Testing Screw Pile Models

  • Authors

    • Mahmood R. Mahmood
    • Asad H. Humaish
    • Mustafa K. Khalaf
    2018-11-28
    https://doi.org/10.14419/ijet.v7i4.20.26236
  • Cohessionless, compression capacity, loading rig, Sand, Screw pile.
  • The main objective of this paper is to design, manufacturing and testing of new loading rig machine to install and testing (i.e. compression and tension load capacity) of screw pile models in both cohesive and cohesionless soil layers. The mainframe  was fabricated from thick steel sections, 8mm steel plates that welded together to construct a heavy and strong frame, that able to resist the expected loads during installation (linear and rotational movement at the same time) and testing of the screw pile models (model of loading test). Two independent gearbox motors (actuators) are used to supply the rotational and vertical movement.  To provide precise control of velocity, the master gearbox motor, that can convert the rotary motion to a linear motion for vertical displacement  along two screw bars via two ball screw systems,  and four stainless guided rods to prevent rotation or inclination the bearing plate (rig) which manufactured from high stiffness stainless-steel was used. The second gearbox motor (‘slave’) mounted on the bottom loading plate that rotates the multi-plate screw pile. It was observed that the measured compression and tension load capacity of screw pile models illustrated the actual behavior of such kind of piles and this machine can be used in both conventional piles (i.e. pipe piles) and screw pile model.

     

     

  • References

    1. [1] Wang, T., Liu, J., Tai, B., Zang, C. and Zhang, Z., 2017. Frost jacking characteristics of screw piles in seasonally frozen regions based on thermo-mechanical simulations. Computers and Geotechnics, 91, pp.27-38.

      [2] Al-Baghdadi, T.A., Brown, M.J., Knappett, J.A. and Al-Defae, A.H., 2017. Effects of vertical loading on lateral screw pile performance. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 170(3), pp.259-272.

      [3] Gavin, K.G., Igoe, D.I. and Doherty, P., 2011, Piles for offshore wind turbines: a state of the art review. Proceedings of ICE Journal, Geotechnical Engineering, 164(4), 245–256.

      [4] Ramadan, M.I., Butt, S.D. & Popescu, R. (2013). Offshore anchor piles under mooring forces: numerical modeling. Canadian Geotechnical Journal, 50(4). pp.373-381.

      [5] Lehane, B.M. & White, D.J. (2005). Lateral stress changes and shaft friction for model displacement piles in sand. Canadian Geotechnical Journal, 42(4). pp. 1039-1052.

      [6] De Blaeij, T. (2013). On the modelling of installation effects on laterally loaded cyclic monopiles. MSc thesis: Technical University Delft, The Netherlands.

      [7] Deeks, A.D. (2008). An investigation into the strength and stiffness of jacked piles in sand. PhD thesis: University of Cambridge, UK.

      [8] De Nicola, A. & Randolph, M.F. (1999). Centrifuge modelling of pipe piles in sand under axial loads. Géotechnique, 49 (3). pp. 295-318.

      [9] Lundberg, A.B., Dijkstra, J. & van Tol, F. (2012). On the modelling of piles in sand in the small geotechnical centrifuge. University of Technology Delft.

      [10] Dijkstra, J. (2009). On the modelling of pile installation. PhD thesis: Technical University Delft, Netherlands.

      [11] Klotz, E.U. & Taylor, R.N. (2001). Development of a New Pile Driving Actuator and a Fully Instrumented Model Pile for Use in the Centrifuge. International Journal of Physical Modelling in Geotechnics. 1(3). pp. 1-16.

      [12] Patra, S., Knappett, J., Brown, M. & Aldaikh, H. (2014). Development of a scalable actuator control system for use in a geotechnical centrifuge. 2nd International Conference on Information Technology in Geo-Engineering. Durham. pp. 183-190.

      [13] Perko, H.A. (2009). Helical piles : A practical guide to design and installation. Hoboken, N.J: John Wiley & Sons Inc.

      [14] Tsuha, C.H., Aoki, N., Rault, G., Thorel, L. & Garnier, J. (2012). Evaluation of the efficiencies of helical anchor plates in sand by centrifuge model test. Canadian Geotechnical Journal, 49(9). pp. 1102-1114.

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  • How to Cite

    R. Mahmood, M., H. Humaish, A., & K. Khalaf, M. (2018). Design and Manufacturing Loading Rig Machine for Testing Screw Pile Models. International Journal of Engineering & Technology, 7(4.20), 420-425. https://doi.org/10.14419/ijet.v7i4.20.26236