|
|
Prediction of shotcrete behavior applying elastoplastic material model
Kejík, Vít ; Miča, Lumír (referee) ; Chalmovský, Juraj (advisor)
This work is focused on the application of advanced elasto-plastic material model intended for shotcrete. Spatial mathematical models of two laboratory tests are created, where this model is used. The first test is a three-point bending concrete specimen. Next, the behavior of the material is analyzed, in which input parameters are entered. Consequently, two reverse analyzes of the available data are analyzed where a match between prediction and measurement can be obtained. The second test is a modified tensile test, where is describe the material behavior in changing of input parameters. Subsequently, reverse data analysis is created, where an acceptable match between prediction and measurement is possible. In every study, the stress waveform in the fracture process zone is analyzed to more detail.
|
|
|
New directions for waterproofing of underground transport
Čech, Tomáš ; Čížek, Luboš (referee) ; Šťastník, Stanislav (advisor)
This diploma thesis focuses on the implementation of waterproofing of underground constructions using an LLDPE membrane hinged on anchors. In the future, this method will replace the commonly used waterproofing system in Scandinavia with extruded polyethylene foam. This method of tunnel construction and waterproofing is compared with the NRTM method, often used in Central Europe. The thesis describes the installation of a waterproofing system, especially materials, accessories, welding devices and auxiliary installation equipment. The main focus of the thesis is to verify the reliability of the individual types of welds and to assess the waterproofing system in terms of implementation and environmental demands.
|
|
|
City circle road Blanka, tunnel Královská obora - mined section, preparation and building construction technology
Kobielusz, Petr ; Mohapl, Martin (referee) ; Šlanhof, Jiří (advisor)
My thesis is focused on process preparation and building construction technology of primary lining road tunnel, implemented in city part of Troja in the capital city Prague. Specifically it is a part of tunnel complex Blanka. The name of this part is Kralovská obora. If the all tunnel parts are built this tunnel complex Blanka can be complemented to already opened tunnels Zlíchovský, Mrázovka and Strahovský which are the part of city traffic circle. This technology preparation includes schedules and financial plans of the building, technological prescription for the primary tunnel lining, safety plan, control and trial/test plans, environmental plan, project of construction site, design of the main working machines, items budget of the north tunnel tube, coordination situation plan with wider relationships transport routes and technical report of building technological project.
|
|
| |
|
|
Design of the tram tunnel lining
Pokorná, Katka ; Čenčík, Dalibor (referee) ; Horák, Vladislav (advisor)
The subject of the diploma thesis is the design of an alternative variant of the tram tunnel lining on the Large Urban Ring Road in Brno Žabovřesky. The first part of the thesis describes the actually implemented solution. PLAXIS 2D software was used for the alternative design, thanks to which the necessary parameters were obtained. The alternative solution of the primary lining consists of fibre-reinforced shotcrete reinforced with two composite meshes. The proposed alternative was found to be economically more advantageous and, last but not least, less time consuming.
|
|
|
Construction technology project of extension of the Supreme Court building in Brno
Coník, Šimon ; Venkrbec, Václav (referee) ; Liška, Pavel (advisor)
Theme of the diploma thesis is a construction technology project extension of the building of the Supreme Court of the Czech Republic in Brno. The content of the diploma thesis is the study of the main technological stages of the main building, solution of wider transport relations with a focus on building supply, objects schedule, time schedule of the main building. The work also includes the project of construction site equipment, design of the main construction machines and mechanisms, technological regulations for special foundations and rough construction, which are supplemented by control and test plans and a plan for securing material resources. As part of other assignments, As part of other assignments, I process occupational health and safety, ecology and environmental protection for selected construction processes, itemized budget for special foundation and rough construction
|
|
|
Prediction of shotcrete behavior applying elastoplastic material model
Kejík, Vít ; Miča, Lumír (referee) ; Chalmovský, Juraj (advisor)
This work is focused on the application of advanced elasto-plastic material model intended for shotcrete. Spatial mathematical models of two laboratory tests are created, where this model is used. The first test is a three-point bending concrete specimen. Next, the behavior of the material is analyzed, in which input parameters are entered. Consequently, two reverse analyzes of the available data are analyzed where a match between prediction and measurement can be obtained. The second test is a modified tensile test, where is describe the material behavior in changing of input parameters. Subsequently, reverse data analysis is created, where an acceptable match between prediction and measurement is possible. In every study, the stress waveform in the fracture process zone is analyzed to more detail.
|
|
|
New directions for waterproofing of underground transport
Čech, Tomáš ; Čížek, Luboš (referee) ; Šťastník, Stanislav (advisor)
This diploma thesis focuses on the implementation of waterproofing of underground constructions using an LLDPE membrane hinged on anchors. In the future, this method will replace the commonly used waterproofing system in Scandinavia with extruded polyethylene foam. This method of tunnel construction and waterproofing is compared with the NRTM method, often used in Central Europe. The thesis describes the installation of a waterproofing system, especially materials, accessories, welding devices and auxiliary installation equipment. The main focus of the thesis is to verify the reliability of the individual types of welds and to assess the waterproofing system in terms of implementation and environmental demands.
|
|
|
New directions for waterproofing of underground transport
Čech, Tomáš ; Vaněrek, Jan (referee) ; Šťastník, Stanislav (advisor)
This diploma thesis focuses on the implementation of waterproofing of underground constructions using an LLDPE membrane hinged on anchors. In the future, this method will replace the commonly used waterproofing system in Scandinavia with extruded polyethylene foam. This method of tunnel construction and waterproofing is compared with the NRTM method, often used in Central Europe. The thesis describes the installation of a waterproofing system, especially materials, accessories, welding devices and auxiliary installation equipment. The main focus of the thesis is to verify the reliability of the individual types of welds and to assess the waterproofing system in terms of implementation and environmental demands.
|
|
|
Evaluating the quality of implementation of the hand shotcrete
Kopecký, Lukáš ; Schmid, Pavel (referee) ; Svoboda,, Pavel (referee) ; Dočkal, Karel (advisor)
Currently, the high speed and low price are required for construction works in the modern architecture. Therefore, it is necessary to deal with verifying the quality of the constructions. Dissertation thesis is focused on evaluating the quality of the execution of sprayed concrete without accelerating additives applied by spraying by a dry way manually-sprayed. The quality of shotcrete was judged on the basis of standardized both non-destructive and destructive methods using sprayed samples. The quality of shotcrete was assessed in terms of strength of sprayed concrete in pressure, density and homogeneity judged on the basis of the velocity of sound samples. The destructive method was carried out on the core samples which were pressured on the hydraulic press, as the non-destructive method was used ultrasonic passageway method based on the propagation velocity of the ultrasonic pulse. On the basis of our results and their mutual correlations, it has been proposed the modifications of the general equal used for predicting the strength of the sprayed concrete tested by our strength class, which leads to a potential reduction in the number of cores on the real structure, and therefore reduce the price of implementation of qualitative tests and increase effectiveness of carrying out tests on the construction place.
|
guest ::
