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Experimental testing of hydroinsulating injection screens efficiency in dependance on properties of building materials
Červenka, Martin ; Černý, Vít (referee) ; Drochytka, Rostislav (advisor)
The most of the buildings are almost always faced with moisture in our climate. In the past, the humidity was reduced and conducted only by mechanical methods. Over time, chemical wet masonry method also known as chemical infusion curtain was invented and introduced into practice. This method involves the creation of boreholes at a selected height of humid masonry. These boreholes are impregnated with special solutions. These solutions in humid masonry fill pores in the field of boreholes and thanks to this subsequence the monolithic waterproofing curtain is created. The objective of this work is to determine the methodology for verifying effectiveness of various types of waterproofing injection curtains depending on the properties of the various types of building materials.
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Strengthening of vaulted structures by prestressing
Požár, Michal ; Solař,, Jaroslav (referee) ; Drahorád,, Michal (referee) ; Klusáček, Ladislav (advisor)
The topic of this Ph.D. theis is repairing and strengthening of historical wagon vaults (barrel vaults, tunnel vaults) using post tensioning with tendons (monostrands) in longitudinal direction. The vaults should be without an edge, that´s mean the baroque vaults are well appropriate for this method. The pointed barrel vault should be problematic. The stabilization is for a wagon vault created by semicircle or segment part of a circle as well as an elliptic shape. The study has been made for vault with a width of 1 m and for the prestressing force has been used one tendon only. Of course, this method could be apply for normal constructions with a width of many meters. In this case, more tendons should be use with a suitable spacing. The goal of this work was to monitor an experiment model of an wagon vault and a real strengthened baroque vault of a church in Švábenice. During the monitor time, the static Analysis has been made. For these analysis appropriate finite elements in Ansys program has been use. The results of this work is to amplify the knowledge of the real behaviour of strengthened vaults, which could be use like instruction for the civil engineers. Further the public information guide to build an appropriate model of an Vault with an interaction with post-tensioning tendons.
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Static provision of castle in city Drnovice
Caloň, Radim ; Šiška, Radek (referee) ; Strnad, Jiří (advisor)
The goal of the project is a static provision design of Drnovice castle. This castle (today a municipal office and a restaurant) is violated by vertical cracks. There is a significant horizontal displacement vector. That’s why horizontal prestress redevelopment (using prestressed cables) was chosen. A drawing documentation is an integral part of the project.
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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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Structural assessment of the reinforced concrete chimney
Teplý, Jakub ; Hasala, Ivo (referee) ; Girgle, František (advisor)
The aim of this thesis is assessment of existing condition reinforced concrete factory chimney, who has undergone structural and technical survey, under which was found many failures caused of horizontally tension - significant vertical cracks in the chimney stack. The object of this work will also make appropriate proposals rehabilitation of concrete stack by design prestressed cables monostrand in horizontal direction, grouting open cracks and reprofiling surface of chimney stack.
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Complex diagnostics of the family house
Tomanová, Jana ; Balkanský, Ondřej (referee) ; Schmid, Pavel (advisor)
This master´s thesis deals with the issue of the building from a clay. It is focused on defects and rehabilitations of these constructions. The introductory parts concerns with probable defects especially of clay buildings, furthermore with causes of the creation of defects, its depictions and the relevance. In the following part the methods of rehabilitation not only of clay buildings are presented. In this part the rehabilitative methods of foundation, vertical and wood constructions, which create mainly the structural support of the buildings, are described. In the second part, the structural and technical research of the current structure with farm part – barn is executed. The part of research is creation of the drawing documentation, description of disposition and structural and constructional solution of building, structural calculation of a part of construction, assessment of actual state of structure and prospective plan of proceeding and rehabilitation.
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Reconstruction of the town spa in Malé Svatoňovice
Macek, Štěpán ; Špiller, Martin (referee) ; Guzdek, Adam (advisor) ; Kalousek, Lubor (advisor)
The aim of the bachelor thesis was to prepare a documentation for building permits and a part of the documentation for the building construction on the basis of an architectural study, developed in the „AG35 – Monuments Restoration Studio“ module. The topic of the studio work was to think about the appropriate use of a listed building in the historic center of the village of Malé Svatoňovice and to create an architectural study. I have proposed the following concept. The building should serve as a municipal house, so I have concentrated the corresponding functions here: the municipal office, the ceremonial hall, the museum, doctors labs, cosmetics, the pharmacy and finally the spa, which had a long tradition here. When restoring an object, I proceed synthetically. I examine the quality and preservation of individual layers. Then I highlight the best of each one. If some layer have not been preserved, but still have had its qualities, I remind it in a new language. I think it was Tadao Ando who said, "If the genius loci is to be legible, it must be revived and provoked by inventive inputs." I combine modern with historical using timelessness.
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Rehabilitation of sewer connections and manholes on the sewer network
Holeš, Petr ; Malaník,, Stanislav (referee) ; Raclavský, Jaroslav (advisor)
Bachelor`s thesis makes a summary of today`s state of methods designed for rehabilitation of sewer manholes and laterals. The work is then comparing them and provides examples of specific technologies for each method. There are recommendations for system operatives at the ends of corresponding chapters. Prediction of the future development of this sphere of civil engineering is situated at the end of theoretical part of bachelor`s work. Practical part of bachelor’s thesis is dealing with the analysis of defects of an existing sewer lateral and three manholes, with subsequent commentary of suitability for each rehabilitation method. The result is choosing the most suitable method for rehabilitation of sewer lateral and manholes.
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