Results 161 to 170 of about 243 (207)
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Physical modelling of helical pile anchors
International Journal of Physical Modelling in Geotechnics, 2007Helical piles design is based usually on empirical correlations between the uplift capacity and the torque resistance of the pile during installation. A simplified theoretical relationship to predict the uplift capacity of deep helical piles in sand from the installation torque was reported.
Tsuha, Chc +4 more
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Helical Piles as a Novel Foundation System for Offshore Piled Facilities
Abu Dhabi International Petroleum Exhibition and Conference, 2015Abstract Driven piles are used to support the majority of offshore oil and gas structures with jacket structures supported by axially loaded piles still remaining the most common form of fixed offshore platform. Piles for conventional platforms are normally driven open-ended steel piles.
G. Spagnoli, K. Gavin
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Performance of Helical Piles with Grouted Shafts
New Technological and Design Developments in Deep Foundations, 2000A new foundation system employing in-situ grouting of helical screw piles has recently been developed. As the anchor is installed into the soil, a column of grout is "pulled down" around the anchor shaft providing an in-situ grouted shaft. This foundation system has been successfully employed at several sites with very soft soils overlying a more ...
Robert A. Vickars, Samuel P. Clemence
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Lateral Capacity of Helical Piles in Clays
Journal of Geotechnical Engineering, 1996In this paper, the behavior of helical piles under lateral loads in clayey soils is examined through an experimental investigation on model piles. Tests were conducted on rigid helical piles with different numbers of plates. Model anchors were made of 13.8 mm diameter mild steel shafts to which mild steel plates of 33 mm diameter were welded.
Yenumula V. S. N. Prasad +1 more
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The occurrence of residual stresses in helical piles
2015Residual stresses generated during the pile installation are usually observed and considered in the interpretation of conventional pile load tests. However, in the case of helical piles, residual stresses can be generated by previous loadings. At the end of the unloading stage in tension tests, the shaft resistance is reversed, and the helices are ...
Schiavon, José A. +3 more
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Axial Performance of Helical Tapered Piles in Sand
Geotechnical and Geological Engineering, 2017The axial capacity of novel spun-cast ductile iron (SCDI) tapered pile fitted with a lower helical plate is investigated. Seven instrumented piles, five SCDI tapered and two steel straight shafts, were installed in sand soil using mechanical torque. The piles were tested under axial compressive loading and their ultimate capacities were determined.
Ahmed Fahmy, M. Hesham El Naggar
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Physical modelling of helical screw piles in sand
2010Empirical correlations between installation torque and uplift capacity of helical screw piles are frequently employed as a procedure for on site quality control of this type of foundation. In this work a theoretical relationship between uplift capacity and installation torque of deep helical screw piles in sand is proposed.
de Hollanda Cavalcanti Tsuha, C. +4 more
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Performance-Based Design Method for Multiple Helices of Helical Pile in Cohesionless Soil
Transportation Research Record: Journal of the Transportation Research Board, 2022Multiple helices are being used frequently in helical pile applications nowadays. This paper presents multiple helices on simplified field design charts for small diameter helical piles that relate service compressive load and soil parameters as a group with the pile parameters.
Nur Mohammad Shuman +2 more
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Performance of helical piles in oil sand
Canadian Geotechnical Journal, 2009The results of a comprehensive pile load-test program and observations from field monitoring of helical piles with either a single helix or double helixes installed in oil sand are presented in this paper. Eleven full-scale pile load tests were carried out including axial compression, uplift, and lateral load tests.
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Lateral Performance of Helical Pile in Cohesionless Soil
2021Helical pile is one of the deep foundation system used to support the axial compression, axial tension, and lateral loading. Helical piles use as foundation for wind farms, transmission tower, pipelines, for underpinning, monopole, etc., as axial and lateral support.
Raunak Sinha, S. P. Dave, S. R. Singh
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