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Bearing Capacity of Screw Piles with Holes in Helices Driven in Multi-strata Sandy Soils Under Static Axial Compression Loading
The current study investigated the behavior of Sscrew piles with holes in wings with various diameters installed by rotational torque in multi layer strata of sandy soil under the influnce axial static loads. The soil used was fine sand with gypsum content of 14.27% with different relative densities. A labratory physical model was manufactured locally to conduct tests.The total length of the screw piles was 50 cm and the helix spread from the tip of pile upward to a length of 40 cm which was the same as the pile insertion depth into the multi layered soil and the remaining 10 cm was above the surface of soil with a pile cap placed over it. The lower layer of soil was dense sand of relative density 70% and the upper layer was loose sand of relative density of 30%. The ultimate bearing capacty of screw piles with holes in wings was compared to the that of an ordinary pile. Furthermore, the failure criterion used for the ordinary pile was the load coressponding to settlement of 10% of the pile diameter, while the load coressponding to settlement of 20% of the helix diameter was utilized for the screw piles. The data recorded and plotted to illustrate the load-settlement curve shows that the ultimate bearing capacity of screw piles with holes are (3–5) times higher than that of the ordinary pile. The dominant factor to increase the bearing capacity of the screw pile with holes in wings was the helix diameter and not the increment number of helices in the case of different diameter shafts.
Bearing Capacity of Screw Piles with Holes in Helices Driven in Multi-strata Sandy Soils Under Static Axial Compression Loading
The current study investigated the behavior of Sscrew piles with holes in wings with various diameters installed by rotational torque in multi layer strata of sandy soil under the influnce axial static loads. The soil used was fine sand with gypsum content of 14.27% with different relative densities. A labratory physical model was manufactured locally to conduct tests.The total length of the screw piles was 50 cm and the helix spread from the tip of pile upward to a length of 40 cm which was the same as the pile insertion depth into the multi layered soil and the remaining 10 cm was above the surface of soil with a pile cap placed over it. The lower layer of soil was dense sand of relative density 70% and the upper layer was loose sand of relative density of 30%. The ultimate bearing capacty of screw piles with holes in wings was compared to the that of an ordinary pile. Furthermore, the failure criterion used for the ordinary pile was the load coressponding to settlement of 10% of the pile diameter, while the load coressponding to settlement of 20% of the helix diameter was utilized for the screw piles. The data recorded and plotted to illustrate the load-settlement curve shows that the ultimate bearing capacity of screw piles with holes are (3–5) times higher than that of the ordinary pile. The dominant factor to increase the bearing capacity of the screw pile with holes in wings was the helix diameter and not the increment number of helices in the case of different diameter shafts.
Bearing Capacity of Screw Piles with Holes in Helices Driven in Multi-strata Sandy Soils Under Static Axial Compression Loading
Karkush, Mahdi (editor) / Choudhury, Deepankar (editor) / Fattah, Mohammed (editor) / Ibrahim, Ibrahim W. (author) / Karkush, Mahdi (author)
International Conference on Geotechnical Engineering Iraq ; 2024 ; Warith Al-Anbiyaa University, Karbala, Iraq
Current Trends in Civil Engineering and Engineering Sciences 2024, Vol 1 ; Chapter: 14 ; 162-174
2024-11-16
13 pages
Article/Chapter (Book)
Electronic Resource
English
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