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Properties of alluvial sediments at Albertov, Prague
Chvílová, Martina ; Boháč, Jan (advisor) ; Lešner, Jeroným (referee)
Bachelor thesis deals with the sediments of river terraces in Prague, Albertov. On these sediments from the deep drill hole J6 in campus Albertov area I made eight grain measurements, processed grain curves and normatively classified terrace soils with classes S1, S2, S3 and F3, F4. They are sandy soils partly containing fine gravel or fine fraction admixture. I also performed the grain analysis on soils 1,5m deep in near morphological distance from the drill hole on which bases I searched for analogy between sediments on campus Albertov building site. They are recent soils of local and foreign digged material. In documented terrace material with S2 character was observed that with content of fine- grained fraction under ca. 5% the increase of the proportion of fine-grained admixture elevates the angle of sands natural slope.
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Analysis of slope deformation from the Mužský hill, Příhrazská plošina plateau
Pantůčková, Klára ; Blahůt, Jan (advisor) ; Lešner, Jeroným (referee)
This thesis is dealing with analysis of landslide on the eastern hillside of the Mužský hill, which lies on the Příhrazská plošina Plateau in Český ráj. Příhrazská plošina Plateau belongs to areas, where landslides occur very often and it is well known for a destructive landslide at Dneboh village in 1926. Landslide under the Mužský hill originated on hillside of a Tertiary volcano, which penetrated Cretaceous sandstones and claystones. That distinguishes it from other landslides in the area. Geophysical method of electrical resistivity tomography was used for finding landslides slip surface. Due to small resistivity contrast between landslide mass and underlying claystones, it was not able to identify slip surface with high certainty. The results show only some indications of it. The geophysical exploration however, proved that the landslide mass is overlaying originally exposed sandstone blocks in the accumulation part of the landslide. The whole area of the landslide was mapped into engineering geology map of slope stability at 1:2000 scale with the help of GPS. Slope map on the basis of digital model terrain acquired from LiDAR measurements was used, as a basis of new map. This slope map provided more information about older landslides around examined landslide. From results of the mapping was...
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The Blanka tunnel, geological hazadrs and problems during boring
Sedláček, Václav ; Král, Jan (advisor) ; Lešner, Jeroným (referee)
The Blanka tunnel has two boring sections: Brusnice tunnel and Královská obora tunnel. Both tunnels were boring in difficult geologycal conditions, but the geology conditions of these tunnels are not same. Also they had not the same hazards during boring. There was used a spectrum of different technical works with hazard reduction purpose and safety process of boring. There were three serious accidents, wnich everyone made a creater on the surface, but they have not the same causes. This text has a task to describe a geological survey before and during the boring of both tunnels. How other reasons affected the process of boring? How the tunnels were bored? What events preceded the everyone of three major failure? This text does not deal with economical things of boring and effects of specific personal influence on the process of boring. Key words Tunnel, excavation, Blanka, Brusnice, Letná, Stromovka park, Vltava river, underground water, geology, ordovik, New Austrian Tunnelling method, pilot tunnel, calotte, bench, bottom, arche, bolt, lining, grouting, collapse of ceiling, failure, tube, shale, quarzite, soil, loess, ballast, clay
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Civil-engineering and practical comparing of groundworks in difficult geotechnical conditions
Fleischmann, Aleš ; Lešner, Jeroným (advisor) ; Voltr, Jaroslav (referee)
iv Abstrakt anglicky Thesis is focused on subject of foundation engineering for undemanding constructions at construction sites with difficult basis conditions. In first part of thesis the selected methods for depth foundation construction are discussed. These methods were used or have potential to be used at examined locations. Examined locations with difficult basis conditions are described in second part of thesis. Final part of thesis contains preparation for detailed IGP for foundaton construction in locality Praha - Řeporyje. Main objective of thesis is to assess various methods of special foundation engineering in difficult basis conditions and to evaluate their suitability for using in given geological conditions.
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Engineering Geology description of an operated quarry
Fleischmann, Aleš ; Král, Jan (advisor) ; Lešner, Jeroným (referee)
This thesis deals with the development of mining and exploration work in the quarry Masty, its engineering-geological and brief description of the geological development of the area including a description of the currently mined and nearest quarries. For my research was important aerial photographs, geological, hydrogeological maps and maps of mineral deposits. The work contains only my own images quarry. The work is documented in the current scope and direction of mining.
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Properties of alluvial sediments at Albertov, Prague
Chvílová, Martina ; Boháč, Jan (advisor) ; Lešner, Jeroným (referee)
Bachelor thesis deals with the sediments of river terraces in Prague, Albertov. On these sediments from the deep drill hole J6 in campus Albertov area I made eight grain measurements, processed grain curves and normatively classified terrace soils with classes S1, S2, S3 and F3, F4. They are sandy soils partly containing fine gravel or fine fraction admixture. I also performed the grain analysis on soils 1,5m deep in near morphological distance from the drill hole on which bases I searched for analogy between sediments on campus Albertov building site. They are recent soils of local and foreign digged material. In documented terrace material with S2 character was observed that with content of fine- grained fraction under ca. 5% the increase of the proportion of fine-grained admixture elevates the angle of sands natural slope.
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The causes of damage of cuts and embankments
Pacholíková, Andrea ; Král, Jan (advisor) ; Lešner, Jeroným (referee)
Title The causes of damage of cuts and embankments Abstract Thisworkdealswithproblemsofstabilityofslopes,trenches,offcutsofcommunications,especiallyreasonsfor their damaging. There are briefly listed areas which are in Czech republic prone to sliding and described most common causes for damages of slopes. Author next describes several location, where were slope deformations documented. These locations are in Czech Republic and Maroco. Extent of deformations and their causes are described in this work and documented with photos.
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