Author: Kyongsun KimPublisher:
ISBN:
Category : Concrete piling
Languages : en
Pages : 338
Book Description
Ground Surface Vibrations Induced by Pile Driving and Their Effect on the Quality of Early-age Concrete
Author: Kyongsun KimPublisher:
ISBN:
Category : Concrete piling
Languages : en
Pages : 338
Book Description
Construction Vibration Attenuation with Distance and Its Effect on the Quality of Early-age Concrete
Author: John SiwulaPublisher:
ISBN:
Category : Piling (Civil engineering)
Languages : en
Pages : 470
Book Description
Damage to structures due to vibrations from pile driving operations is of great concern to engineers. This research has stemmed from the need to address potential damage to concrete-filled pipe piles and recently placed concrete structures that could be affected by pile driving vibrations. The study will focus on two topics: (1) The attenuation of potentially damaging pile driving vibrations with distance from the source, and (2) The effects of distance and curing time of concrete on the quality (unconfined compressive strength) of recentlyplaced concrete exposed to pile driving vibrations. The effects of pile driving vibrations did not cause problems with concrete compressive strength except for the case where concrete had only cured for 4 to 6 hours before vibration.
Ground Movements and Vibrations Caused by Impact Pile Driving of Prestressed Concrete Piles in Central Florida
Author: Jorge Enrique Orozco HerreraPublisher:
ISBN:
Category :
Languages : en
Pages : 115
Book Description
It is concluded that in cases where vibration levels comply with the thresholds defined by the Florida Department of Transportation (FDOT) large ground deformations can still occur depending on the above-mentioned site-specific variables. In terms of numerical modeling alternatives, a continuous modeling approach offered a better estimation of the stress field generated by pile driving than a discontinuous approach. This allows for better determination of the strains within the soil continuum leading to better ground deformation predictions.
Joint Participating Intermodal Surface Transportation Planning & Research Work Program
Author: Wisconsin. Department of TransportationPublisher:
ISBN:
Category : Federal aid to transportation
Languages : en
Pages : 148
Book Description
Effect of Pile-driving Induced Vibrations on Nearby Structures and Other Assets
Author: Publisher:
ISBN:
Category : Piling (Civil engineering)
Languages : en
Pages : 131
Book Description
The work described here represents an attempt to understand the mechanisms of energy transfer from steel H-piles driven with diesel hammers to the surrounding soil and the energy attenuation through the soil by measuring ground motion vibrations in the near vicinity of the pile. Attenuation rates of vibration decay with radial distance from the driven pile were calculated. A spreadsheet tool was developed to estimate distances from the pile at which the threshold settlement vibrations may be exceeded.
Dynamic Effects of Pile Installation on Adjacent Structures
Author: Richard WoodsPublisher: CRC Press
ISBN:
Category : Architecture
Languages : en
Pages : 192
Book Description
This book describes the current state of knowledge and practice in judging the potential and determine the practice of agencies that must assess and prevent damages due to piling vibrations
An Investigation Into the Attenuation of Ground Vibration, Induced by Pile Driving
Author: Alison McMasterConstruction Vibrations
Author: C. H. DowdingPublisher:
ISBN:
Category : Science
Languages : en
Pages : 648
Book Description
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.
Models for Prediction of Surface Vibrations from Pile Driving Records
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
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.
Nonlinear Analysis of Pile Driving and Ground Vibrations in Saturated Cohesive Soils Using the Finite Element Method
Author: Mehmet Serdar SerdarogluPublisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 245
Book Description
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.