National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
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.
Preliminary study of the construction of a tram tunnel in Brno
Kuhajdik, Adam ; Janků,, Hynek (referee) ; Horák, Vladislav (advisor)
The selection of a suitable tunneling technology within the territory of the town has an essential impact on behaviour of surrounding buildings. The thesis presents basic applicable methods. The selected method is simulated in a mathematical model whose input parameters are defined according to geotechnical investigation and by calculating from cone penetration test. Furthermore, the thesis deals with parametric comparisons of a constructional element in dimensioning, horizontal and vertical shift of this element and simplified comparison of steel and concrete prices. This thesis also contains re – comparison of construction behaviour within a model with real deformations which are measured using an inclinometer in situ.
Mechanical properties of granitoid rocks of the Moldanubian batholith in the context of a planned deep underground radioactive waste repository
Brabec, Marek ; Horák, Vladislav (referee) ; Krmíček, Lukáš (advisor)
The author of this bachelor thesis carried out a study of the mechanical and physical properties of granites exposed both on Čeřínek hill, which represents the central part of the delineated polygon of the Hrádek site, and in the nearby active Rácov quarry near the village of Růžená. In the theoretical part of the thesis the author describes the geology of the investigated site and the methods used to determine the investigated properties. In the practical part of the thesis the results and outputs obtained from the measurements are mentioned and discused. The practical part of the thesis presents and discuses the results and outputs obtained from field and laboratory measurements.
Correlations of parameters of selected rock types based on laboratory tests
Závacký, Martin ; Lahuta, Hynek (referee) ; Durmeková,, Tatiana (referee) ; Horák, Vladislav (advisor)
The dissertation thesis deals with the properties of hard rocks important for designing geotechnical structures, such as strength and deformation characteristics, as well as rock failure criteria. This work examines the possibility of using correlation relations to estimate the strength characteristics of rocks from index tests, which can make the rock testing process more efficient. The author described selected laboratory tests of rocks and identified several limitations of the tests procedures based on his own practical experience. The correlation analysis of an extensive data set and the derivation of regression relations for selected dependencies were performed. Furthermore, the rock strength estimation quality of the newly derived regressions was compared with the already published regressions. The analysis shows that the achieved degree of correlation is not sufficient to generalize the examined regressions. A significant reason of the low degree of correlation is the combination of the variability of rock properties and limitations of practical testing procedures. Thus, focus should be paid on calibration of the regression relationships within smaller areas in order to precisely estimate the rock properties as reliable input to the geotechnical design.
Monitoring of Underground Construction with Low Overburden
Lossmann, Jaroslav ; Ožana,, Štěpán (referee) ; Hrubešová,, Eva (referee) ; Horák, Vladislav (advisor)
Geotechnical monitoring (GTM) is an essential part of the observation method. In the principle it is the measurement and monitoring of preselected magnitudes – their changing values in the course of the constructing process and their partial evaluation. On the measured values basis the correctness of designed structures and technological processes is verified, optionally new technical and organizational measures are adopted in order to guarantee the continuous and safe constructing course. The main goal of the dissertation is to analyze the current state of the problematics and evaluate the methods of GTM in underground structures with low overburden, including suggestions and recommendations for procedures. In the framework of knowledge, practical experience and data analysis, the basic types and procedures of monitoring elements of underground structures with low overburden will be defined.
Solution of some rock stability problems in slopes and walls with optimization of anchor elements
Holý, Ondřej ; Vojtasík,, Karel (referee) ; Pruška, Jan (referee) ; Horák, Vladislav (advisor)
This presented phd thesis focuses on the problems of instability in the rock walls and slopes, whose manifestation is among othersv rockfall and associated risks. It describes the theoretical aspects of the description of instability and summarizes the construction methods and technologies to eliminate them. On the basis of knowledge gained from specific buildings in the Czech Republic and based on the research project solved by author, submits suggestion to optimimalization of the anchoring elements as a basic part of most remediation methods.
Technical gallery under the railway
Michaljaničová, Jana ; Horák, Vlastimil (referee) ; Horák, Vladislav (advisor)
The focus of this master thesis design static assessment of shotcrete lining belonging to underground gallery for water supply. This object is a part of larger project called „Uzel Plzeň, 3. stavba – přesmyk domažlické trati“. The gallery with length almost 100 m leads directly under two double-track lines with height traffic importance and two factory sidings. The thesis deals with the recommendation of a suitable technological procedure for excavation and excavation stability. It also includes design of both primary and secondary shotcrete lining. The assessment is based on the evaluation of the outputs of two characteristic cross-sections processed in Plaxis 2D. The outputs consist of information on internal forces, deformations and state of stress in the surrounding rock. Based on this information, a structural design is performed
Design of excavation and primary tunnel lining on high-speed railway construction
Dostál, Tomáš ; ING, Tomáš Zítko, CEng MICE, EUR (referee) ; Horák, Vladislav (advisor)
As part of modernization of the Brno-Přerov railway line, is in the section between village Blažovice and town Vyškov desined tunnel composed of two monorail tubes about 640 meters length. Tubes are situated in neogenic clay with an overburden height of 11 meters. This master thesis deals with design suitable tunnel exavation, primary lining with static calculation and geotechnical monitoring.
Design of excavation and primary lining of the Dřevnovický tunnel at the construction of high-speed railway connection Brno - Přerov
Bastl, Jiří ; ING, Tomáš Zítko, CEng MICE, EUR (referee) ; Horák, Vladislav (advisor)
This master thesis deals with a design of a Drevnovice tunnel primary lining at planned high speed rail corridor connecting Brno and Přerov. The whole design as well as defining of the most suitable tunnel excavation method are described. Thesis also contains a breakdown of the excavation, construction technology and the scheduling of geotechnical monitoring procedures. The Plaxis 2D program, based on the finite element method, was used to create numerical models of two cross sections of the Dřevnovice tunnel. Based on mathematical modeling outputs, a static calculation of the primary lining was calculated.
Analysis of the way of the route through the sloping area of the D1 motorway in the SR
Horňáková, Lenka ; Horák, Vlastimil (referee) ; Horák, Vladislav (advisor)
The construction of motorways in Slovakia faces a series of geotechnical problems due to the mountainous relief. One of these problems is also discussed in this diploma thesis, where the motorway route is led through a landslide area. The aim of the thesis is to compare two different proposals of the D1 motorway in part of Hubova - Ivachnova section. The theoretical part deals with the issue of slope movements in connection with transport line constructions. In the practical part, the proposals for specific solutions of the high embankment route variant and variant with the bridge are discussed. Both variants are designed in the Plaxis numeric program. Subsequent comparison and evaluation of variants is performed in relation to the degree of stability, deformation, structural stress and construction costs.

National Repository of Grey Literature : 30 records found   1 - 10nextend  jump to record:
See also: similar author names
4 Horák, V.
1 Horák, Vladimír
4 Horák, Vojtěch
3 Horák, Vratislav
12 Horák, Václav
9 Horák, Vít
3 Horák, Vítězslav
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