Pile Response under Axial Tension Forces in Sandy Soils

Ibrahim, A.; Ashour, Mohamed; Altahrany, Ayman

doi:10.1061/(asce)be.1943-5592.0001142

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Negative means the decrease of τ is comparatively fast within a radial range, therefore the estimated extent of the influence zone reduces at the top and toe sections of the pile. The negative value of The upward movement of the pile body induces upward force which reduces the effective vertical stress of the surrounding soil mass, as explained in [32][33][34][35]. Higher shear stress is induced around the toe due to pile discontinuity, which results in a larger reduction in effective stress.…”

Section: 5mm Upward Displacement At the Pile Topmentioning

confidence: 99%

The Response of Piles Under Tension Loads Based on Analytical Method and Finite Element Analysis

Lo¹

2018

GEOMATE

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In the past, there were many research studies carried out on the response of single piles and pile groups under compression loads, but it was comparatively lesser for piles and pile groups under uplift loads. Uplift loads on piles usually occur in pile foundations supporting wind farm structures, tall chimneys, transmission towers and jetty structures. During recent decades, research studies on piles under uplift loads have progressed, and were mainly focused on the capacity, failure modes and load displacement performance of single piles, but no research has been done on the influence zone of a pile and its effects within a group. This paper presents the initial findings of research to investigate the stress distribution and influence zone of a single pile under uplift loads using a hybrid approach combining analytical theory and 2D Finite Element (FE) analysis. Finally, the effect of the estimated influence zone was successfully verified in 3D FE analysis which confirmed that group efficiency reduced when an adjacent pile was within the estimated influence zone and thus piles behave as a group.

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Section: 5mm Upward Displacement At the Pile Topmentioning

confidence: 99%

The Response of Piles Under Tension Loads Based on Analytical Method and Finite Element Analysis

Lo¹

2018

GEOMATE

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“…In pipe piles, the applied uplift load is resisted by the sum of shaft resistance developed between the pile and the soil, soil plug capacity inside the pile and its weight. A new method to predict the behavior of pile-soil interaction under axial tension forces in sand soil and load against displacement curve presented by Aser et al, (2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Soil Density and Plug Characteristics on Behavior of Single Pipe Pile Embedded in Cohesionless Soil and Subjected to Uplift Force

Hamadi¹,

Abdul-Husain²

2021

KJE

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It is a significant issue to analyze and understand the pile's behavior as well as to predict the piles' capacity exposed to uplifting load when designing a foundation. Experimental model tests have been conducted for a single pile embedded in cohesionless soil and subjected to uplift force. The experimental tests were performed using open-ended steel pipe piles with circular cross-sectional area an outer diameter of 50 mm in steel soil box (0.5*0.5) with four different height (0.30, 0.50 and two with 0.40 m). The tested piles have been embedment with penetration ratios (PR=L/D) of 10. Three different densities (25%, 50% and 75%) have been used to perform the tests. In addition three tests have been made with relative density of 50% to investigate the function the developed soil column inside the pile (soil plug) during installation.The results revealed that the behavior of single piles depends mainly on soil density and the ultimate pull-out capacity of the pile increases with the increasing of the soil relative density and used the data from this tests to presented formula to estimate the IFR and takes the soil state parameter as a qualitative variable. The results showed also that the removing of plugging soil decreases the pile's pull-out capacity by about 85%. Whilst, using of closed-end or filled with concrete give higher capacity than that of open-end pipe pile by about 33% and 87% respectively.

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Consideration of batter angle in pseudo-static analyses of pile foundations

Wang

Orense

2022

Computers and Geotechnics

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Pile Response under Axial Tension Forces in Sandy Soils

Cited by 7 publications

References 13 publications

The Response of Piles Under Tension Loads Based on Analytical Method and Finite Element Analysis

The Response of Piles Under Tension Loads Based on Analytical Method and Finite Element Analysis

Effect of Soil Density and Plug Characteristics on Behavior of Single Pipe Pile Embedded in Cohesionless Soil and Subjected to Uplift Force

Consideration of batter angle in pseudo-static analyses of pile foundations

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