Hammer's Impact Force on Pile and Pile's Penetration

Wang, Jicheng; Yu, Jianlin; Ma, Shuo; Xiao-nan, Gong

doi:10.1080/1064119x.2015.1016637

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…The structural strength of the pile tubes will directly affect the working performance and reliability of the piling machine under the static pressure and the impact of the diesel hammer, so it is necessary to analyze the structure of the pile [3,4,8]. The flow chart for the simulation shown in Fig.…”

Section: The Finite Element Analysis Of Combined Sleeve Piling Machinementioning

confidence: 99%

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Design of Sleeve Piling Machine and Finite Element Analysis of the Sleeve Tubes

Zhang

Hui

Chen

et al. 2017

AMM

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In order to solve the problems of the easy breakage, transport problems and pile holes shrinkage, a sleeve piling machine was designed. It included a fully used pile frame, a novel pile driver and its piling method. The piling machine integrated the advantages of the diesel hammer piling machine and the vibration hammer piling machine. It is suitable for bored piles and compacted piles. Based on the sleeve pile tubes, the diesel hammer and the vibration hammer worked together to drill. Then the reinforcing cage was lifted by the hoister, the pile tubes were pulled and the concrete were poured with the help of the vibration hammer. All of them can avoid the shrinkage of the pile, the break of the pile, and improve construction efficiency. Besides, finite element analysis of the pile tubes were calculated by ANSYS, the results showed that the strength of the pile tubes was satisfied with the requirements of application. The piling machine and the method were feasible.

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Section: The Finite Element Analysis Of Combined Sleeve Piling Machinementioning

confidence: 99%

“…When diesel hammer or vibration hammer works, especially in the large diameter working condition, the pile tube is difficulty to be pulled out. When a long-spiral pile piling machine is working for a bored concrete pile, the pile bodies are in low quality [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Design of Sleeve Piling Machine and Finite Element Analysis of the Sleeve Tubes

Zhang

Hui

Chen

et al. 2017

AMM

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show abstract

“…Henke 16 showed that the installation method influences soil plugging, as was determined by the significant increase in the horizontal stresses inside the pile. Wang and Yu 17 investigated the impact force of a hammer on a pile and the pile penetration using analytical formulas. Ko et al 18 …”

Section: Introductionmentioning

confidence: 99%

A numerical model of VPS for offshore wind turbine monopiles based on hypoplastic theory

Xiao

2021

Num Anal Meth Geomechanics

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The current research on the penetration of offshore wind turbine monopiles primarily focuses on driving with a vibratory hammer, although there are several smaller studies that focus on the vibrating penetration mechanism. To further the body of research, this paper establishes a numerical model to calculate the vibration penetration speed (VPS) of an offshore wind turbine monopile that considers the soil plugging effect. In this model, a monopile is assumed to be a rigid body. The surrounding soil is divided into a series of circular cylinders of concentric axes. The shear stress at the external soil elements' interfaces and the soil's vertical stress at the monopile toe are calculated using the Gudehus–Bauer hypoplastic constitutive model. The VPS is obtained from the motion equation by compiling it in MATLAB R2012b. Finally, a finite element model is conducted to verify the results, showcasing the rationality of the proposed model. Parameter analyses are also conducted to study the influences of the soil void ratio, soil internal friction angle, vibration frequency, ratio of static load to dynamic load, and monopile diameter on VPS.

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Research on the performance of hydraulic vibratory hammer with coupled dynamic model

Gao

Wang

2022

SN Appl. Sci.

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Hydraulic vibratory hammer is a key equipment during piling process, and mechanical, hydraulic part of the hammer and workload are coupled with each other during operation. The vibration performance depends on the design parameters and the driving system. In order to investigate the vibration performance, a coupled dynamic model is established for hydraulic vibratory hammer, in which the mechanical model of hammer, hydraulic model for driving, and the model of workload are included. The filed test was carried out to validate the dynamic model under idle and operating conditions. Pressure and flow of the hydraulic driving system and acceleration of the mechanical part were obtained during different test conditions. The results of test and simulation were analyzed in time and frequency domain to validate the coupled dynamic model. Then, effects of different eccentric block parameters on the vibration performance were investigated based on the validated model, including radius, thickness, and angle of the eccentric block. Further the design parameters of optimal vibration performance of the hammer are obtained under the constraints of hammer structure, in which the angle is 90°, thickness is 190 mm, and radius is 175 mm.Article Highlights We established a coupled dynamic model of the hydraulic vibratory hammer, including the mechanical model of hammer, hydraulic model for driving, and the simplified model of workload.; The field test is proceeded to validate the model under idle and operating condition; the dynamic response of the mechanical part and hydraulic driving part is analyzed in time and frequency domain; The performance of the hammer is analyzed with the coupled dynamic model, in which better performance of the hammer is obtained. The model-based method also provides a rapid and economical solution for the performance optimization of the hammer.

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Hammer's Impact Force on Pile and Pile's Penetration

Cited by 6 publications

References 6 publications

Design of Sleeve Piling Machine and Finite Element Analysis of the Sleeve Tubes

Design of Sleeve Piling Machine and Finite Element Analysis of the Sleeve Tubes

A numerical model of VPS for offshore wind turbine monopiles based on hypoplastic theory

Research on the performance of hydraulic vibratory hammer with coupled dynamic model

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