Results 221 to 230 of about 1,040 (252)
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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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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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Numerical analysis of helical piles in cohesionless soil
International Journal of Geotechnical Engineering, 2017The 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 +2 more
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Lateral Performance of Large-Capacity Helical Piles
IFCEE 2015, 2015The 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 +1 more
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Lateral Resistance of Helical Piles in Oil Sands
Contemporary Topics in Deep Foundations, 2009Although 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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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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Osterberg Cell Load Testing on Helical Piles
Geo-Frontiers 2011, 2011Helical 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 +2 more
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Helical Anchor Piles Under Lateral Loading
1984Anchors 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 +3 more
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Pullout behaviour of model pile and helical pile anchors Subjected to lateral cyclic loading
Canadian Geotechnical Journal, 1994This paper presents the effect of lateral cyclic loading on the pullout capacity of model and helical piles in clayey soil. The tests were conducted on short rigid model piles in the laboratory in three phases, namely lateral static load tests, lateral cyclic load tests, and vertical pullout tests.
Y.V.S.N. Prasad, S. Narasimha Rao
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A study of helical pile design and construction practices
2015ABSTRACT Helical piles as a foundation solution have experienced a re-emergence in recent years in the United Kingdom, with road and rail authorities eager adopters to permit fast construction with relatively lower construction mobilisation requirements than traditional foundation solutions.
T.A. Beales Ferguson +2 more
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