Determining the Pile Bearing Capacity by the Curve Match Method of High Strain Dynamic Testing

Ding, Wenqi; Qing, Liu; Wang, Bing Yu; Sun, Kang Kang; Sui, Feng Tao

doi:10.4028/www.scientific.net/amm.438-439.1414

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Frontiers in Earth Science frontiersin.org location and the time t 2 is designated as the time when the toe reflected impact wave returns to the sensor location (t 2 is equal to t 1 plus 2 L/c) (Green and Kightley, 2005a;Zhao, 2005;Ding et al, 2013).…”

Section: Figurementioning

confidence: 99%

“…It contains a computer-based program for data acquisition and analysis at the field from the case method (Zhao, 2005). The Case Wave Analysis Program (CAPWAP) is applied for an analysis to correlate the dynamic to static capacity of the piles (Ding et al, 2013). It executes the analysis based on the concept of stress wave propagation with signal matching method to find a reasonable solution (Green and Kightley, 2005a).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of bearing capacity of PHC pipe piles via the dynamic and static loading test

Li²

2023

Front. Earth Sci.

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Due to its faster implementation and potential cost savings for estimating the bearing capacity of PHC pipe piles, the High Strain Dynamic Test (HSDT) offers an alternative approach to Static Load Test (SLT). The report presents a bearing capacity study via those methods with a sliding micrometer. And a Pile Driving Analyzer (PDA) imported from the United States is employed, to determine the design parameters of pile foundation engineering and provide the error sources of bearing capacity. Sliding micrometers with cone-shaped rings are embedded in the inner side of the pile piles every 1 m for measuring the strain. The law of stress and strain at various depths during loading is presented in this paper. As a new concept, the “inflection point” is proposed by the relationship between shaft resistance and relative displacement of pile-soil. By comparing the SLT and HSDT, the relationship between toe resistance and settlement of pile is demonstrated. This paper analyses the reliability and precision, and explore the error source so as to provide theoretical evidence for trail-pile testing in future. And the error of bearing capacity between SLT and HSDT with CAPWAP studies shows that the HSDT could provide adequate results for assessing the bearing capacity of PHC pipe piles.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of bearing capacity of PHC pipe piles via the dynamic and static loading test

Li²

2023

Front. Earth Sci.

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Improved Fictitious Soil Pile Model for Simulating the Base Soil Under the High‐Strain Condition

Guan,

Wen,

Zhang

et al. 2024

Num Anal Meth Geomechanics

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The dynamic pile‐soil interaction significantly affects the accuracy of pile vibration response analysis. However, currently, there is no well‐established method for simulating pile toe soil under high‐strain dynamic loading (HSDL), which presents a major challenge for pile driving analysis. This paper proposes a fictitious soil pile model to simulate reactions and stress wave propagation in the base soil under HSDL. The pile toe soil was regarded as a fictitious soil pile extending downward to the bedrock at a certain cone angle, considering the non‐linear soil stiffness, radiation damping, and hysteretic damping. The solution of the soil responses was given by differential iterative method combined with MTLAB programming. The model's accuracy was validated against a three‐dimensional (3D) finite element model and the Smith model. Sensitivity analysis was performed on parameters such as discreteness, time interval, cone angle, and non‐linear stiffness. The model shows advantages in simulating stress wave propagation in pile toe soil under HSDL, with attenuation rates decreasing with depth and wave speeds stabilizing after an initial decrease. The soil elastic modulus, pile diameter, cone angle, and impact loads influence the attenuation rate, while only the elastic modulus significantly affects wave speed. The results could be helpful for the simulation of the pile toe soil under HSDL and the study of the attenuation of stress waves in the soil.

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Analytical models of impact force-time response generated from high strain dynamic load test on driven and helical piles

Alwalan

Naggar

2020

Computers and Geotechnics

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Determining the Pile Bearing Capacity by the Curve Match Method of High Strain Dynamic Testing

Cited by 3 publications

References 1 publication

Evaluation of bearing capacity of PHC pipe piles via the dynamic and static loading test

Evaluation of bearing capacity of PHC pipe piles via the dynamic and static loading test

Improved Fictitious Soil Pile Model for Simulating the Base Soil Under the High‐Strain Condition

Analytical models of impact force-time response generated from high strain dynamic load test on driven and helical piles

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