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