Results 241 to 250 of about 7,901 (298)

Neuroimaging with photon-counting computed tomography: A review of clinical applications. [PDF]

World J Radiol
Perera Molligoda Arachchige AS, Alves GAM, Fedorov D, Ressa G, Cappellini L, Levi R, Savini G, Catapano F, Francone M, Politi LS.   +9 more
europepmc   +1 more source

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Physical modelling of helical pile anchors

International Journal of Physical Modelling in Geotechnics, 2007
Helical 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.
C. H. C. Tsuha, N. Aoki, L. Thorel, G. Rault, J. Garnier   +4 more
openaire   +1 more source

Numerical study of single helical piles and helical pile groups under compressive loading in cohesive and cohesionless soils

Bulletin of Engineering Geology and the Environment, 2021
In recent years, the use of helical piles as a deep foundation option for structures has increased dramatically because they offer definite advantages over other solutions. The present study undertook a comprehensive investigation of the axial compressive behavior of helical piles in both sandy and clayey types of soil using finite element (FE ...
Mohammadreza Jahanshahi Nowkandeh, Askar Janalizadeh Choobbasti   +1 more
openaire   +1 more source

Helical Piles as a Novel Foundation System for Offshore Piled Facilities

Abu Dhabi International Petroleum Exhibition and Conference, 2015
Abstract 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
openaire   +1 more source

Performance of Helical Piles with Grouted Shafts

New Technological and Design Developments in Deep Foundations, 2000
A 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
openaire   +1 more source

Lateral Performance of Large-Capacity Helical Piles

IFCEE 2015, 2015
The lateral performance of large-capacity helical piles is of significant interest because they can offer an efficient alternative to conventional piling systems in many applications. This paper presents the results of two field lateral load tests conducted on 6.0 m and 9.0 m large-capacity helical piles installed in cohesive soil.
Mohamed A. Elkasabgy, M. Hesham El Naggar   +1 more
openaire   +1 more source

Helical Anchor Piles Under Lateral Loading

1984
Anchors are used in civil engineering practice to provide resistance against uplift and overturning forces for structures such as transmission line towers, aircraft mooring, pipelines, offshore structures, mobile homes, and so forth. Although there are a wide variety of anchor types available, helical screw anchors, consisting of a steel shaft to which
VK Puri, RW Stephenson, E Dziedzic, L Goen   +3 more
openaire   +1 more source

Osterberg Cell Load Testing on Helical Piles

Geo-Frontiers 2011, 2011
Helical piles are structural, deep foundation elements used as a means to transfer the applied axial and horizontal loads, and overturning moments from the superstructure to the soil substructure, within a specified criterion. The design process is complex and incorporates various degrees of uncertainties.
Mehmet Aydin, Thomas D. Bradka, Denton A. Kort   +2 more
openaire   +1 more source

Performance-Based Design Method for Multiple Helices of Helical Pile in Cohesionless Soil

Transportation Research Record: Journal of the Transportation Research Board, 2022
Multiple 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, Mohammad Sadik Khan, Farshad Amini   +2 more
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Cyclic load behavior of helical pile-to-pile cap connections subjected to uplift loads

Engineering Structures, 2021
Abstract Although significant research has been conducted on helical piles, there is a lack of research and official design guidelines on how to create resilient helical pile-to-pile cap connections, especially in tall and light structures where tensile uplift loads may govern the foundation design.
Serhan Guner, Sundar Chiluwal
openaire   +1 more source