Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pre-Drilling Effects on Vibrations and Ground Deformations Caused by Impact Pile Driving
Driven precast concrete piles are used as a compelling deep foundation alternative and can be installed below the groundwater table without providing any casing and also unnecessary time delays. Granular materials with relative densities ranging from loose to medium-dense conditions constitute an ideal scenario to install pile foundations using impact driving methods since their bearing capacity might increase due to soil compaction. However, those soil conditions can be highly susceptible to ground deformations induced by pile driving operations mainly due to particle rearrangement and excess pore water pressure buildup and dissipation. Pre-drilling can play a significant role in pile driving-induced deformations and vibrations since the waves emanating from the pile get attenuated prior to reaching the ground surface as the distance between the pile tip and the ground surface increases. This paper presents the effects of pre-drilling installation procedures of prestressed concrete piles on the ground response quantified in terms of deformations and vibrations using a finite element model conducted in PLAXIS 2D. The authors analyzed two configurations of pre-drilling depths selected from bridge construction projects in Florida. The critical-state based hypoplasticity model for sands enhanced with the intergranular strain concept was used as the constitutive soil model for the analyses, thus allowing the program to track changes in the state of stresses and void ratios of the soil as the pile is being driven in the ground in a continuous large-deformation approach. Two diesel hammers and their corresponding forces applied to the top of the pile were used in the numerical models to consider the effects of the selected rated energies in the final response. The results of the numerical analyses indicated that pre-drilling effectively reduces both ground deformations and vibrations quantified in terms of peak particle velocities due to the relative position of the pile tip in relation to the distance to the ground surface.
Pre-Drilling Effects on Vibrations and Ground Deformations Caused by Impact Pile Driving
Driven precast concrete piles are used as a compelling deep foundation alternative and can be installed below the groundwater table without providing any casing and also unnecessary time delays. Granular materials with relative densities ranging from loose to medium-dense conditions constitute an ideal scenario to install pile foundations using impact driving methods since their bearing capacity might increase due to soil compaction. However, those soil conditions can be highly susceptible to ground deformations induced by pile driving operations mainly due to particle rearrangement and excess pore water pressure buildup and dissipation. Pre-drilling can play a significant role in pile driving-induced deformations and vibrations since the waves emanating from the pile get attenuated prior to reaching the ground surface as the distance between the pile tip and the ground surface increases. This paper presents the effects of pre-drilling installation procedures of prestressed concrete piles on the ground response quantified in terms of deformations and vibrations using a finite element model conducted in PLAXIS 2D. The authors analyzed two configurations of pre-drilling depths selected from bridge construction projects in Florida. The critical-state based hypoplasticity model for sands enhanced with the intergranular strain concept was used as the constitutive soil model for the analyses, thus allowing the program to track changes in the state of stresses and void ratios of the soil as the pile is being driven in the ground in a continuous large-deformation approach. Two diesel hammers and their corresponding forces applied to the top of the pile were used in the numerical models to consider the effects of the selected rated energies in the final response. The results of the numerical analyses indicated that pre-drilling effectively reduces both ground deformations and vibrations quantified in terms of peak particle velocities due to the relative position of the pile tip in relation to the distance to the ground surface.
Pre-Drilling Effects on Vibrations and Ground Deformations Caused by Impact Pile Driving
Turkel, Berk (Autor:in) / Orozco-Herrera, Jorge E. (Autor:in) / Arboleda-Monsalve, Luis G. (Autor:in) / Nam, Boo Hyun (Autor:in) / Jones, Larry (Autor:in)
Geo-Congress 2023 ; 2023 ; Los Angeles, California
Geo-Congress 2023 ; 445-454
23.03.2023
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Pre-Drilling Effects on Vibrations and Ground Deformations Caused by Impact Pile Driving
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