Models for Prediction of Surface Vibrations from Pile Driving Records PDF Download

Author: Brent Ross Robinson
Publisher:
ISBN:
Category :
Languages : en
Pages : 231

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Keywords: construction vibration, peak particle velocity, high strain dynamic testing, geotechnical case history, impact pile driving, noise.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
This study compares high strain dynamic testing measurements taken near the top of a driven pile to peak particle velocities on the ground surface and sound levels detected in the air some distance from the pile during driving. Based on a sample of installation records from 16 piles driven at the Marquette Interchange Project in Milwaukee, Wisconsin, a series of peak particle velocity plots versus distance, energy and scaled distance were created using traditional horizontal distance and rated hammer energy. These plots were modified using the seismic distance, the diesel hammer potential energy from the calculated stroke, and the energy transferred to the pile top. Incorporating these measurements tended to reduce some of the scatter in the data. More importantly, it was also discovered that components of peak particle velocity in the ground can be well correlated to the total pile resistance measured by dynamic testing. A plot of total resistance versus depth often independently yields the same shape curve as a plot of at least one component of peak particle velocity versus depth. A simple mathematical attenuation model is proposed as an initial step toward utilizing this relationship to predict at least one component of ground motions. Measured peak overpressure (noise) in the air correlated less directly to the quantities measured on the pile, but a conservative and simple mathematical model can still be proposed based on the dynamic testing-measured velocity near the pile top and idealized sound generation and attenuation theories.

Author: Jaime Alberto dos Santos
Publisher: IOS Press
ISBN: 9781586039097
Category : Science
Languages : en
Pages : 772

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"This volume contains 101 papers presented at the 8th International Conference on the Application of Stress Wave Theory to Piles, held in Lisbon, Portugal in 2008." "It is divided in 14 chapters according to the conference themes: Wave mechanics applied to pile engineering; Relationship between static resistance to driving and long-term static soil resistance; Case histories involving measurementand analysis of stress waves; Dynamic monitoring of driven piles; Dynamic soil-pile interaction models - numerical and physical modeling; High-strain dynamic test; Low-strain dynamic test; Rapid-load test; Monitoring and analysis of vibratory driven piles; Correlation of dynamic and static load tests; Quality assurance of deep foundations using dynamic methods; Incorporation of dynamic testing into design codes and testing standards; Ground vibrations induced by pile motions; Dynamic measurements in ground field testing." "This conference aims to contribute to a better and more efficient professional interaction between specialized contractors, designers and academicians. By joining the contribution of all of them it was possible to elucidate the today's state-of-the-art in science, technology and practice in the application of stress wave theory to piles."--BOOK JACKET.

Author: Philip Joseph Tatko
Publisher:
ISBN:
Category : Piling (Civil engineering)
Languages : en
Pages : 394

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Author: C. H. Dowding
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 648

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The entire field of construction-induced vibrations - including advances in earthquake engineering, nuclear blast protective design, and construction and mine blasting - is covered in this work. Frequency of vibration and strain form the foundation for the presentation of the material.

Author: Bryan O. Skipp
Publisher: Thomas Telford
ISBN: 9780727726766
Category : Technology & Engineering
Languages : en
Pages : 242

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Conference was initiated by the Ground Board of the Institution of Civil Engineers, London, and was held on 20 November 1997, London.

Author: Werner E. Schmid
Publisher:
ISBN:
Category :
Languages : en
Pages : 145

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This study is a continuation of vibratory pile driving research at Princeton University Soil Engineering Laboratory with twin goals of optimization of the driving procedure and correlation of the driving records with the bearing capacity of piles. Deformable body vibration of the pile is studied and computerized for a linear soil model. The results indicate that the wave resonance frequencies of piles do not very appreciably due to embeddment. The shape of the dynamic soil resistance is better predicted by the computerized response of the modified nonlinear soil model used for impact studies. This response is calculated by putting the results of the static surcharge load transfer as the initial conditions and assuming that the applied force is constant during small time intervals. Model experiments are carried ot for closed- as well as open-end piles excited by a sinusoidal force produced by an electromagnetic vibratory in the 'rigid body' range of frequency by the application of a unidirectional surcharge. At the impact threshold value of the sinusoidal force phase instability occurs and full impact happens between the pile and the soil with a time duration which appears to be a soil parameter. (Author).

Author: Mehmet Serdar Serdaroglu
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 245

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Two numerical applications are performed to predict the load capacity of single piles in normally consolidated clays. It is observed that the model with no slippage at the interface predicts almost twice as much load capacity as the model with interface. In regards with the end bearing capacities, Coyle & Castello's method is found to be most conservative followed by the finite element method, the Janbu's method, the Meyerhof's method, and finally the Vesic's method. In respect to skin friction resistance, the finite element is found to be the most conservative method, followed by the Beta, the Lambda, and the Alpha method. In the dynamic analysis, the amplitudes of ground vibrations are investigated based on the variation of: (1) the soil type, (2) the pile embedment length and (3) the released hammer energy. In the first analysis, five types of soils - loose and dense sands and, soft, medium stiff, and stiff clays - are modeled. The highest vibration amplitude is calculated for the loose sand with a peak particle velocity (PPV) of 10.0 mm/s followed by the dense sand with a PPV of around 4.0 mm/s. Among the clay types, the vibrations are higher for the stiffer clay in the near field, which is 9 m (half a pile length) or less away from the pile. In the second analysis, three different embedment lengths - full, half, and quarter pile length - are modeled. It is found that the quarter embedded piles produce greater vibration amplitudes as compared to the half and fully embedded piles. Larger amplitudes of vibrations are encountered on the ground surface for shorter pile embedment lengths. In the third analysis, three different impact forces consisting of 2,000 kN (F), 6,000 kN (3F) and 10,000 kN (5F) are applied on the pile head. It is concluded that increase in hammer energy causes increase in the peak particle velocities.

Author:
Publisher:
ISBN: 9789175016603
Category :
Languages : en
Pages : 156

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Author: Ashraf Salah-Eldin Mohamed
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 106

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