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The design of the repair of the asphaltic lining of embankment dam
Dostál, Kryštof ; Rudolfová, Mirka (referee) ; Říha, Jaromír (advisor)
This diploma thesis deals with the design of repairs to the asphalt concrete facing of the upper reservoir of the pump-storage power station Dlouhé Strána. The first part summarizes the knowledge about asphalt concrete facings, experience from foreign constructions and a description of the damage on this hydraulic structure. The second part defines the variants of repairs and the selection of the most suitable on the basis of decision analysis.
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Assessment of empirical formulae for determining hydraulic conductivity
Barenčík, Ladislav ; Zachoval, Zbyněk (referee) ; Říha, Jaromír (advisor)
The main purpose of this diploma thesis is to check up and compare empirical formulae (Hazen, Slichter, Terzaghi, Beyer, Zauerbrej, Krüger, Kozeny, Zunker, Zamarin, USBR, Pavčič) for determining hydraulic conductivity, which are mostly publicated in different and dimensionally inhomogenous forms. The importance of an accurate determination of hydraulic conductivity and the derivation of a general formula for determining hydraulic conductivity are listed in the first part of this diploma thesis. Assessment methodology and empirical formulae in dimensional homogenous form are described in the following part. Evaluating and comparing of empirical formulae is mentioned in the last part. According to the results of this diploma thesis, the best empirical formula for determinig and estimating hydraulic conductivity is Hazen formula. Formula with the widest range of validity is Slichter formula.
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Slope stability calculations for small dams
Hajda, Jindřich ; Hodák,, Jiří (referee) ; Říha, Jaromír (advisor)
There are approximately 20 000 small dams in the Czech Republic. This number entails many ponds or small flood attenuation reservoirs, which provide protection against floods. We do not know much about the structure and material properties of these earth dikes. Concerning the small dam stability the current technical standard ČSN 75 2410 focuses foremost on the angle of both the upstream and downstream slopes in case of different materials, and the method of the stability assessment in case of a dam height being 6m or more. Most of these earth dikes are still standing in spite not being built according to any technical standards. They do not follow any standards mostly because they were built before the modern technical standards were published. This diploma thesis focuses on assigning the degree of a reserve in the safety factor for studies of 5 homogeneous earth dikes and 3 inhomogeneous earth dikes. The calculation was done using the Plaxis 2D software using to the shear strength reduction method. The Calculation of the safety degree is made for 4 typical load cases.
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The dam Letovice - the design of the reconstruction of the technical surveillance system
Vahalík, Zbyněk ; Špano, Miroslav (referee) ; Říha, Jaromír (advisor)
This bachelor thesis deals with the design of the reconstruction of the technical surveillance system of the dam Letovice. The introductory part describes the area of the dam, dam's surroundings and the dam itself with the particular objects. The subsequent section describes the technical surveillance system and a list of existing measuring devices with description. This is completed by the measurement results of the technical surveillance system from previous years. Additionally, it also contains the list of devices, which will be removed during the reconstruction. The final part deals with the design of the new technical surveillance system, list of measuring devices and their characteristics.
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Defects on the upstream asphaltic linings at dams
Mezera, Jiří ; Špano, Miroslav (referee) ; Říha, Jaromír (advisor)
This bachelor thesis deals with analysis of defects on the upstream asphaltic linings. In the introductory part, the types of asphaltic concrete and the composition of asphalt concrete linings are presented. Following section describes individual layers and methods of paving asphaltic concrete. The most common defects are described and analysed regarding the cause, possible sites and severity in the next section. The analysis also includes practical examples of defects and their repair. In the final section there is a summary table, which includes the most common types of defects together with the severity and necessity of repair.
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