Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Investigation of Load-Displacement Behavior of Helical Screw Piles in the All-Directional Confining Vessel Apparatus (FCV-AUT) and its Generalization to Large-Scale Screw Piles

Document Type : Original Article

Authors
Mohsen Ahmadnejad 1
Morteza Naghipour 2
Amir Mansour Askari Fateh 3
1 Doctor of Philosophy Student of, Department of Civil Engineering, Babol University of Technology, Babol, Iran
2 Professor, Department of Civil Engineering, Babol University of Technology, Babol, Iran
3 Assistant Professor of Department of Civil Engineering , Shomal University,Amol
10.22065/jsce.2024.427802.3286
Abstract
In contemporary times, considering the expansion of urbanization and the construction of sophisticated engineering structures, special foundation systems have garnered attention. One of the crucial and practical types of foundations is helical piles, including helical screw piles. Owing to the commendable performance of these piles, their application has gained significance in various geotechnical engineering contexts. The current research encompasses a case study on utilizing these piles in the city of Babolsar. To better understand the behavior of these piles in different soils, various scenarios were experimentally evaluated in the sandy soil of Babolsar, and the obtained results were subject to interpretation and analysis. Key parameters in these investigations include the effect of helix diameter, helix spacing ratio (S/D), sand density, and repeatability. The results indicate that increasing helix diameter, sand density, and S/D ratio will enhance the load-bearing capacity. This relationship holds in reverse as well. Moreover, good repeatability was observed in the results. Considering the outcomes of this study, the utilization of these piles proves to be significantly valuable in improving soil conditions. In addition to providing adequate resistance, it offers considerable economic benefits, making it advisable for implementation in construction projects. Furthermore, the results obtained from the FCV device, using scaling theory to extrapolate to the results of large-scale helical piles executed in the field, demonstrate good concordance.
Keywords
Helical Screw Piles
Physical Modeling
All-Directional Confining Vessel Apparatus
Babolsar Sand
Scaling theory

Subjects

  • [1] Lin, C., & Jiang, W. (2019). Evaluation of vertical effective stress and pile tension capacity in sands considering scour-hole dimensions. Computers and Geotechnics, 105, 94-98.
  • [2] Eslami, A., & Fellenius, B. H. (1997). Pile capacity by direct CPT and CPTu methods applied to 102 case histories. Canadian Geotechnical Journal, 34(6), 886-904.
  • [3] Rahil, F. H., Al-Neami, M. A., & Al-Zaho, K. A. N. (2016). Effect of relative density on behavior of single pile and piles groups embedded with different lengths in sand.  Technol. J, 34(6).
  • [4] Perko, H. A. (2009). Helical piles: a practical guide to design and installation. John Wiley & Sons.
  • [5] Tsuha, C. D. H. C., Aoki, N., Rault, G., Thorel, L., & Garnier, J. (2007). Physical modelling of helical pile anchors. International Journal of Physical Modelling in Geotechnics, 7(4), 01-12.
  • [6] El Naggar, H., & Ezzeldin, I. (2021). Evaluation of the Static Design Procedure in the Canadian Foundation Engineering Manual for Piles in Cohesionless Soil. Geosciences, 11(11), 472.
  • [7] Sakr, M. (2009). Performance of helical piles in oil sand. Canadian Geotechnical Journal, 46(9), 1046-1061.
  • [8] Vickars, R. A., & Clemence, S. P. (2000). Performance of helical piles with grouted shafts. In New technological and design developments in deep foundations (pp. 327-341).
  • [9] Mansour, M. A., & El Naggar, M. H. (2022). Optimization of grouting method and axial performance of pressure-grouted helical piles. Canadian Geotechnical Journal, 59(5), 702-714.
  • [10] Huang, Y., Zhuang, X., Wang, P., & Zong, Z. (2022). Axial behavior of pressure grouted helical piles installed in marine soft clay based on full-scale field tests. Geotechnical and Geological Engineering, 40(12), 5799-5812.
  • [11] Abbase, H. O. (2017). Pullout capacity of screw piles in sandy soil. Journal of Geotechnical Engineering, 4(1), 8-12.
  • [12] Krishnaswamy, N. R., & Parashar, S. P. (1994). Uplift behaviour of plate anchors with geosynthetics. Geotextiles and Geomembranes, 13(2), 67-89.
  • [13] Khazaei, J., & Eslami, A. (2016). Geotechnical behavior of helical piles via physical modeling by Frustum Confining Vessel (FCV). International Journal of Geography and Geology, 5(9), 167-181.
  • [14] Fateh, A. M. A., Eslami, A., & Fahimifar, A. (2018). A study of the axial load behaviour of helical piles in sand by frustum confining vessel. International Journal of Physical Modelling in Geotechnics, 18(4), 175-190.
  • [15] Fakharian, K., Shafiei, M., & Hafezan, S. (2022). Investigation of soil setup effects on pile response in clay considering overconsolidation ratio and installation method through physical modeling. Canadian Geotechnical Journal, 60(4), 488-503.
  • [16] Esmailzade, M., Eslami, A., Nabizadeh, A., & Aflaki, E. (2022). Effect of cone diameter on determination of penetration resistance using a FCV. International Journal of Civil Engineering, 1-14.
  • [17] Bhattacharya, S., Demirci, H. E., Nikitas, G., Prakhya, G. K. V., Lombardi, D., Alexander, N. A., ... & Mylonakis, G. (2021). Physical modeling of interaction problems in geotechnical engineering. In Modeling in Geotechnical Engineering (pp. 205-256). Academic Press.
  • [18] Zare, M., & Eslami, A. (2014). Study of deep foundation performances by frustum confining vessel (FCV). International Journal of Civil Engineering, 12(4), 271-280.
  • [19] Sedran, G. (1999). Experimental and analytical study of a frustum confining vessel (Doctoral dissertation).
  • [20] Zarrabi, M., & Eslami, A. (2016). Behavior of piles under different installation effects by physical modeling. International Journal of Geomechanics, 16(5), 04016014.
  • [21] Shojaei, E., Eslami, A., & Ghanjiyan, N. (2022). Experimental and Comparative Investigations of New Self-Expanded Steel Pile Behavior via Physical Modelling. Soil Mechanics and Foundation Engineering, 58(6), 482-490.
  • [22] Karimi, A. H., Eslami, A., Zarrabi, M., & Khazaei, J. (2017). Study of pile behavior by improvement of confining soils using frustum confining vessel. Scientia Iranica, 24(4), 1874-1882.

  • Receive Date 10 December 2023
  • Revise Date 31 January 2024
  • Accept Date 18 February 2024