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Remediation of former In-Situ uranium mining region.
Kříž, Jakub ; Kalous, Jaroslav (referee) ; Jícha, Jaroslav (advisor)
Remediation process of region, formally exploited for chemical leaching of uranium, is based on pumping water contaminated mostly by residuals of sulfuric acid from the relevant geological horizons. The contaminated water is then treated in a chemical plant. In the treatment process evaporators play the key role. Presently operating evaporators – three units – are of falling film type. Heating service is provided by compressed vapor that is generated by evaporators. For driving the compressors and associated circulating pumps of each unit electric power of 3,4 MW is required. In the evaporators treated solution is distributed into individual tubes by nozzles of cyclone type that are mounted at the top end of tubes. In the evaporators feed solution contains calcium sulfide of low concentration. Once the calcium sulfide concentration in the evaporating process reaches the state of saturation, even locally, fouling is initiated. Thus the solids start to grow on the inner surface of the tube wall and the nozzle’s openings become restricted. The evaporator performance – evaporating rate – gradually declines and when it reaches the bottom limit the evaporator has to be shut down. This is followed by carrying out the cleaning procedure. At the time when the evaporators started operating (1996) the period between shut downs lasted around a half a year. However, gradually, this period has become substantially shorter – presently it may even last one week only. The thesis proposes two ways of approaching the present hardly acceptable state. First, replacement of distributing nozzles by a set of properly perforated sieve trays secures the uniform distribution of solution into each individual tube. Second, evaporators’ duty will be taken over by newly build multi-flash concentrator that will substitute the presently operating evaporators. Configuration of this new equipment is derived from widely used multi-flash distillation of sea water. Heat required by the concentrator’s end heaters is drawn from a gas turbine exhaust gas. Steam provided by Heat Recovery Steam Generator is supplied to the condensing heat exchangers installed on the evaporator’s feed stream. Generator coupled to the gas turbine, fueled by natural gas, provides the electric power of 30 MW for export.
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Construction-technological project of the revitalization of the tipping plant in Vítkovice
Labaj, Ondřej ; Diaz, Yvetta (referee) ; Vlčková, Jitka Laura (advisor)
This diploma thesis deals with the proposal of a construction technological project of the tipping Plant in Vítkovice. The work consists of a technological report, transport routes proposal, study of the realization of the main technological stages, time and financial plan of all main objects, construction site project, design of main construction machines and mechanisms. The project also includes itemized budget of the main building structure together with a detailed timetable, financial plan and schedule deployment of construction machinery and workers. The content of this thesis also includes a technological project for the implementation of semi-assembled ceiling structures with a plan for securing material resources and a technological project for the execution of remediation works of concrete structural elements, for which an inspection and test plan with the description of inspection was prepared. The health and safety plan was also created from the perspective of the health and safety coordinator.
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Reinforced concrete structure of the railway platform roofing
Vodová, Pavla ; Bažant, Zdeněk (referee) ; Šulák, Pavel (advisor)
The bachelor‘s thesis deals with assessment of existing damaged reinforced concrete strucutre of the railway platform roofing according to the original project documentation. Apart from assessment of existing structure, there is prepared a design of two alternative solutions. The first alternative is a remediation of damage structure with description of appropriate diagnostic methods for testing concrete structures and with description of technological process of implementation of remediation. The second alternative is design of completely new structure instead of existing one. This new structure is designed as a monolithic frame contruction with restraint reinforced concrete panel and one – step foundation block. In this bachelor’s thesis there were prepared a design and assessment of sub – sections and work – out appropriate drawing documentation. All static assessments are calculated according to ultimate limit state.
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Specifics of a Financing Management of a Building Company in Economic Instability Phase
Starý, Jan ; Comorek,, Martin (referee) ; Comorek,, Martin (referee) ; Comorek,, Martin (referee) ; Hroníková, Marta (advisor)
This thesis on specifics of financial management construction company in a time of economic instability is accompanied by the issue of management companies in times of crisis. It is divided into two parts: a theoretical and practical. The theoretical part is focused on explaining concepts such as crisis and the company, which is followed by the very notion of crisis management. It describes how to recognize the crisis in the company and what tools can be used to solve it. The practical part looks at this from the perspective of management small and large companies, both have very similar content activities. In terms of big companies is being explored as a joint stock company Strabag, which is part of the Austrian multinational corporations. At the level of small business is focused on a limited liability company, which is active in smaler district. The main source of investigation in this thesis is the financial analysis applied to both companies. At the end of the work, the results of both companies compared.
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Durability of glued joints of structural timber elements
Mlčák, Tomáš ; Vejpustek, Zdeněk (referee) ; Vaněrek, Jan (advisor)
This bachelor thesis deals with the topics of durability of glued connections of structural wooden elements. The theoretical part of the work deals with the construction of wood, selected defects of wood, a description of carpentry joints and fasteners. The work also pays attention to adhesives and sealants used in glued joints of wooden structures or the issue of crack repair systems in wood. The practical part of the work is focused on experimental verification of the durability of used adhesives and sealants for glued carpentry elements.
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Digital Climate II.
Sidlárová, Kristýna ; Jansa, Jakub (referee) ; Šrámek, Jan (advisor)
In the diploma thesis Digital Climate II. I'm dealing with the representation of the relationship between physical and virtual matter. The final presentation will take place via video installation in a non-gallery environment. In the work process, I record my own experience of gradual work with the processes of influencing the physical mass of ceramic clay and virtual mass software interfaces. The subject of the work is a remediation of physical ceramic material, whose raw materiality is supported by its absence of glaze or any other noble surface treatment, which could be considered a certain metaphor of today, beautifying AR face filters on social media, Photoshop and unattainable standards of beauty and falsely promoted products.
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Assessment of the technical condition of the sewer system in the village
Mosná, Silvia ; Korytář, Ivo (referee) ; Hluštík, Petr (advisor)
This bachelor thesis includes an assessment of the technical state of the sewerage network in Bantice, which is divided into 7 chapters and the conclusion. The work includes legislation that deals with the issue in question. Also general information about the municipality, which includes municipal amenities, geological conditions, hydrological conditions, water infrastructure and others. Due to the fact that a passport has been carried out in the village, one chapter deals with passportization in the village where there is a separate subchapter describing the current state. Thanks to the acquired camera record and passportization, it passes to the next part, evaluation of the technical condition. This work encompasses a part, that deals with remediation of technically most important chesses and sections and subsequently recommends repairs or reconstructions. The last part is the hydraulic assessment of the collecting network, which has been calculated in three variants in order to reach the most realistic situation in the village. There are two drawing in the addition, detailed situation and hydrotechnical situation at 1:2000 scale.
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Risks and Measures at the Renovation of Vernacular Wooden Structures and Comparable New Buildings
Beníček, Tomáš ; Hunková,, Veronika (referee) ; Šebesta, Petr (advisor)
This diploma thesis is focused on structural progression of massive wooden structures, requirements to contemporary massive wooden structures, development of carpentry joints and connecting instruments used in constructions and reconstructions of these buildings, and analysis of risks connected with reconstructions of selected historical wooden structures. Another item of this thesis concerns on evaluation of possible risks in particular connecting instruments that are used in massive wooden structures per the FMEA method. The main content of thesis includes a description of selected historical wooden structures, options of their damages, forms of remediation and a description of possible risks and measures in reconstructions. In conclusion the thesis focuses on comparison of historical massive wooden structures and comparable new buildings.
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