Equipment Technology Innovation for Extreme-Batter Pile Driving Operations

Grau, David; Kirk, John H.; Back, Edward

doi:10.1061/9780784412329.013

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Steel H-pile is popularly used in congregated urban regions for its unique features in terms of fast construction and high in compressive capacity resulting from its large surface contact area with the ground medium for inducing high shaft frictions. Steel H-piles can be directly driven into the ground by movable pile-jacking machines [1,2], whereas significant postdriving stresses might be induced to impair the pile load-bearing capacity [3]. Post-driving driving stresses (as illustrated in Figure 1) are compressive forces resulting from the elastic rebound of the pile after pile driving together with the recovery of the ground medium after the disturbance of the installation [4].…”

Section: Introductionmentioning

confidence: 99%

Second-Order Direct Analysis for Steel H-Piles Accounting for Post-Driving Residual Stresses

2022

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"Driven steel H-piles are extensively adopted in engineering practice due to their convenience and efficiency in both economic and construction. The post-driving residual stress, a compressive axial stress distributed along the pile induced by the pile installation, might significantly deteriorate the pile bearing capacity. Thus, a large enough factor of safety is adopted in the traditional analysis to cover the influence caused by the post-driving residual stress. However, it sometimes leads to a large waste in costs and materials. Thus, the present study adopted the second-order analysis, a modern simulationbased design method, for the design of the driven steel H-pile. A robust and efficient finite element formula is necessary to conduct the second-order design method in practice. Hence, a new Line-Finite Element (LFE) formula is proposed in this paper. The developed LFE directly captures all the crucial factors in the analysis of the driven steel H pile, including the nonlinear Soil-Structure Interaction (SSI) and the post-driving residual stress. A validation example is presented at the end of this paper, which illustrates the accuracy and the computational efficiency of the proposed LFE formula."

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Section: Introductionmentioning

confidence: 99%

Second-Order Direct Analysis for Steel H-Piles Accounting for Post-Driving Residual Stresses

2022

View full text Add to dashboard Cite

show abstract

“…Steel H-pile is popularly used in congregated urban regions for its unique features in terms of fast construction and high in compressive capacity resulting from its large surface contact area with the ground medium for inducing high shaft frictions. Steel H-piles can be directly driven into the ground by movable pile-jacking machines (Grau et al, 2012; Hannigan et al, 2016), whereas significant post-driving stresses might be induced to impair the pile load-bearing capacity (Seo et al, 2009). Post-driving driving stresses (as illustrated in Figure 1) are compressive forces resulting from the elastic rebound of the pile after pile driving together with the recovery of the ground medium after the disturbance of the installation (Fellenius, 2002).…”

Section: Introductionmentioning

confidence: 99%

Line-finite-element implementation for driven steel H-piles in layered sands considering post-driving residual stresses

Ouyang

Wan

Liu

et al. 2020

Advances in Structural Engineering

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Driven Steel H-piles are commonly used in the deep foundation of being cost-effective and easy in workmanship. The post-driving residual stresses acting on the pile could be large when being driven in cohesionless sands, significantly affecting its compressive strength. Current design methods, mostly based on the empirical assumptions of using safety factors, are unable to consider the post-driving residual stresses on piles accurately and usually very conservative in practical applications. Such consideration is further complicated when the pile is embedded in layered sands. Moreover, the soil-structure interaction (SSI) between pile and ground medium is usually complicated in the analysis and should be appropriately considered in a successful design. This paper proposes a line-finite-element implementation method, based on the Euler-Bernoulli pile element formulations, for robustly and efficiently analyzing the driven steel H-piles in layered sands with explicitly modelling the SSI. The effects resulting from the post-driving residual stresses are considered in the total potential energy equation for generating the secant relations. The derivation procedure is elaborated with details. Consequentially, verification examples are given for validating the accuracy of the proposed method. This work would be helpful for improving the numerical efficiency and accuracy for designing the steel H-piles in layered sands.

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Equipment Technology Innovation for Extreme-Batter Pile Driving Operations

Cited by 2 publications

References 11 publications

Second-Order Direct Analysis for Steel H-Piles Accounting for Post-Driving Residual Stresses

Second-Order Direct Analysis for Steel H-Piles Accounting for Post-Driving Residual Stresses

Line-finite-element implementation for driven steel H-piles in layered sands considering post-driving residual stresses

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