In-Situ Testing of Vibration Propagation While Driving the Prefabricated Piles

Pradelok, Stefan

doi:10.5593/sgem2014/b12/s2.064

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The maximum range of these soil accelerations at the measurement point located at the corner of the road bridge (measurement point T11, the distance from the driven pile 18.8 m) is λa=0.599 m/s 2 [26]. As the distance from the measurement points to the driven prefabricated pile decreases, the recorded values increase.…”

Section: Field Testsmentioning

confidence: 99%

Vibration Propagation In Subsoil: In-Situ Testing And Numerical Analyses

Pradelok

Łupieżowiec

2017

Architecture, Civil Engineering, Environment

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This paper presents results obtained with the use of accelerometers during in-situ testing and its comparing with results from numerical simulations. Horizontal accelerations of propagating impulses caused by driving the prefabricated piles were recorded. Range of the quakes as well as amplitudes of longitudinal and transverse horizontal accelerations of propagating vibrations on the terrain surface were determined. The recorded results were used to calibrate the numerical model of the finite element method. The most important factor influencing the propagation of impacts is the phenomenon of damping of the propagating wave in the soil. The mechanism of damping proposed by Rayleigh was used in the analysis, which, when selecting the appropriate parameters of the model, is able to realistically simulate the observed phenomena. The soil, in which the propagation of impulses occurred, was described with the use of linear-elastic model. Modulus of deformation correspond to the values of small deformations, which occur during the wave propagation in the subsoil. The impulse giving vibrations was caused by the falling hammer on the driven pile. The axial symmetry of the border condition was used in the analyses. The results of numerical simulations were compared with the results of field measurements of accelerations at different distances from the source of vibration. A good consistency of acceleration amplitudes in the direction of vibration propagation was achieved and it depended on the distance from location of the driven pile. The obtained results will be used in the future to assess the extent of the impacts on the environment and values of acceleration on elements located in the vicinity of the structure.

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Section: Field Testsmentioning

confidence: 99%

Vibration Propagation In Subsoil: In-Situ Testing And Numerical Analyses

Pradelok

Łupieżowiec

2017

Architecture, Civil Engineering, Environment

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“…This fact is related to, on the one hand, the growing needs brought about by large projects such as underground structures [1,2], tower structures, heavy industrial buildings, large tanks and storage yards, highways and large bridges [3,4], and on the other [5,6] -to the development of equipment, research procedures and test result interpretation methods, as well as restricted possibilities of conducting full scale tests on site (mainly due to time constraints and the costs of the projects themselves). Another factor that has contributed to this process was the development of potential to execute large endeavors, which has grown together with engineering and calculation technology related to numerical modelling of the issues in question.…”

Section: Introductionmentioning

confidence: 99%

Model of multiple-layer pavement structure-subsoil system

Kadela¹

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Progress made in recent years has brought about a high demand for increasingly modern structural and technological solutions. Each structure should in turn be designed and built to show sufficient durability for the intended period of use. The requirement of durability is met if, throughout its intended lifetime, the structure fulfils its roles regarding load-bearing capacity, serviceability limits and stability without excessive, unexpected costs. Due to the above, a need arises to predict the response of an engineering structure to given loads throughout its life. Thus it becomes increasingly common to employ numerical analyses using the finite elements method (FEM), both on the design stage and later, for the purposes of evaluating the state of a specific structure. However, a numerical calculation model may be constructed in different ways. This paper presents the impact of geometry of the model, the choice of a discretization mesh and the choice of a continuous 3D or 2D model corresponding to pavement-subgrade system calculation model. 3-dimensional modelling was carried out in this paper as full modelling of actual engineering problems in 3-dimensional space, and in the form of simplified modelling using axial symmetry. In the model, a traditional multi-layer pavement structure was considered. Criterion values obtained in numerical analyses were compared to values obtained with the use of VEROAD software.Key words: road pavement, mechanical methods, multi-layer structure, calculation model, finite element analysis (FEA).Model of multiple-layer pavement structure-subsoil system M. KADELA * Building Research Institute, 1 Filtrowa St., 00-611 Warsaw, Poland i.e. horizontal or vertical extension, etc. The global trend of transforming issues of reality into problems of mechanics is visible in the approach adopted in Eurocodes. For example, Eurocode 7 introduces a new concept of geotechnical design, which interconnects, among others, the construction law, standards, design and execution instructions, field and laboratory tests, determining loads for the analyzed system and adoption of calculation models. It thus becomes vital to choose the correct procedure which will allow to describe the behavior of the analyzed structure in all predicted phases of its work. Theories of mechanics employed in the evaluation of structure performance involve certain simplifications; they use models which may considerably deviate from the real structure performance, making their practical application difficult. Creation of a full, credible calculation model therefore automatically implies the use of numerical methods in the analyses.It should be noted that the numerical tool in the form of a numerical calculation model may be ambiguous to some extent, as in general a model may be created in different ways [10]. The differences are mostly influenced by:• geometry of the calculation model and the manner of applying boundary conditions, • adoption of constitutive models for materials used for layers of the structures and th...

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In-Situ Testing of Vibration Propagation While Driving the Prefabricated Piles

Cited by 2 publications

References 9 publications

Vibration Propagation In Subsoil: In-Situ Testing And Numerical Analyses

Vibration Propagation In Subsoil: In-Situ Testing And Numerical Analyses

Model of multiple-layer pavement structure-subsoil system

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