Results 261 to 270 of about 3,665 (285)

Numerical analysis of helical piles in cohesionless soil

International Journal of Geotechnical Engineering, 2017
The paper presents a numerical investigation carried out for helical pile installed in loose cohesionless soil with varying density and dimensions of the helical blade/shaft.
Balu E. George, Subhadeep Banerjee, Shailesh R. Gandhi   +2 more
openaire   +1 more source

Axial Performance of Helical Tapered Piles in Sand

Geotechnical and Geological Engineering, 2017
The 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
openaire   +1 more source

Lateral Resistance of Helical Piles in Oil Sands

Contemporary Topics in Deep Foundations, 2009
Although there are several methods available for estimating the axial capacities of helical piles, there is little literature available on the lateral performance of helical piles. The results of a lateral pile load test program and field monitoring of helical piles with either single or double helixes installed in oil sand soil are presented in this ...
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Undrained uplift capacity of single helical piles and helical pile groups

2022
Nikitas Stefopoulos, Konstantinos Georgiadis, Themistoklis Nikolaidis   +2 more
openaire   +1 more source

Design of Helical Piles for Heavily Loaded Structures

New Technological and Design Developments in Deep Foundations, 2000
Over the past 20 years the square shaft solid steel helical screw pile has come into expanded use as a permanent deep foundation element in new construction of heavily loaded structures, i.e., column loads in excess of 445 kN (100,000 lbs). This increased use, along with recognition by every national building code in the United States of at least one ...
openaire   +1 more source

The occurrence of residual stresses in helical piles

2015
Residual 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., dos Santos Filho João M.S.M., de H.C. Tsuha Cristina, Thorel Luc   +3 more
openaire   +1 more source

Physical modelling of helical screw piles in sand

2010
Empirical 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.
openaire   +1 more source

Seismic Performance of Helical Piles

World Congress on Civil, Structural, and Environmental Engineering, 2022
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Thinking Bigger – 32-Storey Building on Helical Piles

Deep Foundations Institute 49th Annual Conference Proceedings
Helical piles have often been characterized as handy little tools in the toolbox of solutions for structural support of foundations. They have provided options to construct foundations and anchorage in very challenging locations where more common methods were impractical.
openaire   +1 more source

Evaluation of Design Methods for Helical Piles

2021
Chong Tang, Kok-Kwang Phoon
openaire   +1 more source