Journal ArticleDOI
Behavior of a helical anchor under vertical repetitive loading
TLDR
In this paper, the behavior of a helical anchor embedded in soft marine clay under vertical repetitive loading was investigated and it was found that, up to a cyclic load ratio of 55%, there is no reduction in capacity.Abstract:
In the field of ocean engineering, anchors are used for several purposes. This article studies the behavior of a helical anchor embedded in soft marine clay under vertical repetitive loading. Helical anchors are simple steel shafts to which one or more helical plates are attached at regular intervals. The tests are conducted on a model helical anchor installed in a soft marine clay bed prepared in a test tank. Repetitive loading is applied using a pneumatic loading arrangement. Different cyclic load ratios and time periods are adopted. In each test, after the application of repetitive loading, poststatic‐pullout tests are conducted to observe the effect of repetitive loading on anchor behavior. From the test results, it is found that, up to a cyclic load ratio of 55%, there is no reduction in capacity. Instead, there seems to be a marginal increase in capacity and reduction in displacement. The reasons for this behavior are explained in terms of induced changes in strength and deformation behavio...read more
Citations
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Journal ArticleDOI
A review on the behavior of helical piles as a potential offshore foundation system
TL;DR: Helical piles are used mainly to resist tension forces generated by uplift and overturning moments of various structures, therefore they have been suggested as a potential alternative to driven pil... as mentioned in this paper.
Journal ArticleDOI
Direct CPT and CPTu Methods for Determining Bearing Capacity of Helical Piles
TL;DR: In this article, the axial capacities of thirty-seven helical piles in different sites were predicted by direct CPT methods and static load tests on the same types of piles.
Dissertation
Screw piles as offshore foundations : numerical and physical modelling
TL;DR: This document breaches copyright law and should be removed from the public portal immediately.
Journal ArticleDOI
Field Study of Capacity Helical Piles in Sand and Silty Clay
TL;DR: In this paper, axial static loading tests on single, double, and triple helix helical piles under grouted and un-grouted conditions have been conducted, and the field study has been performed on two different soil types including sand and silty clay soil to investigate the behavior of helical pile.
Journal ArticleDOI
A Technical Note on Development and Performance Study of a Set-up for Imparting Lateral Cyclic Load on Piles
TL;DR: In this paper, a new apparatus consisting of mechanically and electrically controlled components has been designed and fabricated to understand the effect of lateral cyclic load on model pile foundations, a series of tests are performed for its performance study.
References
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Journal ArticleDOI
Effect of Cyclic Loads on Undrained Strength of Two Marine Clays
TL;DR: In this paper, the results of standard undrained triaxial compression tests indicate that cyclic loading prior to undrained shear causes a small reduction in undrained modulus.
Journal ArticleDOI
Repeated Loading on Single Piles in Sand
Sin-Fatt Chan,Thomas H. Hanna +1 more
TL;DR: In this paper, the response of the pile to repeated loads is governed by the: (1) type of load, (2) amplitude of load; anf (3) number of cycles of load applied.
Journal ArticleDOI
Stability threshold for cyclic loading of saturated clay
TL;DR: In this paper, the stability threshold for both structured and normally consolidated Grande Baleine clay is about 60-65% of the original undrained shear strength measured at the same strain rate as that used in the repeated loading test.
Journal ArticleDOI
Embedded anchor response to uplift loading
TL;DR: In this paper, a number of factors which influence soil-anchor interaction are evaluated, and in addition, the extent of soil disturbance and the influence of pore water pressures during testing are assessed.
Journal ArticleDOI
The effect of cyclic loading on the undrained shear strength of a silty clay
A. F. L. Hyde,S. J. Ward +1 more
TL;DR: In this article, a series of postcyclic undrained triaxial strength tests were carried out on samples of a silty clay (Keuper Marl), which had not failed under cyclic loading, to investigate the effect of this loading on the post cyclic monotonie effective stress path and strength of the soil.