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Research in the field of construction elements and design of concrete pavements
Grošek, Jiří ; Birnbaumová, Marie (referee) ; Vébr,, Ludvík (referee) ; Varaus, Michal (advisor)
The presented dissertation is focused on research in the field of dowels and design of concrete pavements using the finite element method. The theory part describes the history and the currently used techniques in the world and in the Czech Republic. The practice part of the dissertation contains a description of design methods, diagnostics of concrete pavements by using FWD and a description of laboratory tests on beams with inserted dowels. The results of measurements and modelling are verified on real operating conditions on testing fields. Based on the dissertation results, the amendment of the Czech standard ČSN 73 6123-1 regarding the position of dowels were proposed and approved. In addition, methodological guidelines of the Ministry of Transport regarding the measurements of the dowels and tie bars position and diagnostic by FWD was approved. The conclusion of the work summarizes and emphasizes the results of the dissertation.
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Application of new and progressive diagnostic methods on transport infrastructure objects - implementation process
Styk, Josef ; Březina, Ilja ; Matula, Radek ; Janků, Michal ; Grošek, Jiří
In order to maintain the proper condition of buildings, bridges, roads and other structures, their regular maintenance is essential. Often, if the distress is detected at the beginning of the disorder, the cost of removing it is far lower than after months of uncontrolled degradation. Locating a distress in time, often means detecting it before it is visible to the naked eye. A key means of detecting hidden distresses is non-destructive diagnostic methods (NDT). The purpose of the proposed methodology is to clarify the procedure for introducing new non-destructive diagnostic methods into practice in order to exploit their potential and to replace them or to suitably complement the existing methods. There are presented selected NDT methods and possibilities of their application on selected transport infrastructure objects, including the contribution of comparative measurements (round robin tests) and the creation of illustrative cases of the application of new NDT methods. The presented methodology was prepared within project TE01020168 - Centre for Effective and Sustainable Transport Infrastructure (CESTI), with financial support of the Czech Technology Agency within the Centre of Competence Program. This methodology is intended primarily for the state authorities, the transport infrastructure administrators and companies dealing with diagnostic surveys.
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Evaluation of pavement condition by combination of FWD device and ground penetrating radar
Stryk, Josef ; Březina, Ilja ; Matula, Radek ; Grošek, Jiří ; Janků, Michal
The combination of two non-destructive diagnostic devices – the Falling Weight Deflectometer (FWD) used to assess the bearing capacity of pavements and the Ground Penetrating Radar (GPR) used to determine the thickness of structural layers, to identify inhomogeneities, hidden defects and failures are increasingly being used in pavement diagnostics. The purpose of the methodology is to specify the procedure for performing measurements of combinations of these two devices, in the context of conducting a diagnostic survey of pavements. It draws attention to the benefits of processing data measured by both devices and their use in creating homogeneous sections, which serve as a basis for planning of maintenance, repair and reconstruction of roads. The presented methodology was prepared within project TE01020168 – Centre for Effective and Sustainable Transport Infrastructure (CESTI), with state support of the Czech Technology Agency within the Centre of Competence Program. This methodology is intended primarily for companies dealing with pavement diagnostic surveys
Fulltext: PDF
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Research in the field of construction elements and design of concrete pavements
Grošek, Jiří ; Birnbaumová, Marie (referee) ; Vébr,, Ludvík (referee) ; Varaus, Michal (advisor)
The presented dissertation is focused on research in the field of dowels and design of concrete pavements using the finite element method. The theory part describes the history and the currently used techniques in the world and in the Czech Republic. The practice part of the dissertation contains a description of design methods, diagnostics of concrete pavements by using FWD and a description of laboratory tests on beams with inserted dowels. The results of measurements and modelling are verified on real operating conditions on testing fields. Based on the dissertation results, the amendment of the Czech standard ČSN 73 6123-1 regarding the position of dowels were proposed and approved. In addition, methodological guidelines of the Ministry of Transport regarding the measurements of the dowels and tie bars position and diagnostic by FWD was approved. The conclusion of the work summarizes and emphasizes the results of the dissertation.
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