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Securing the pit in over-consolidated clay
Svobodová, Nikola ; Chalmovský, Juraj (referee) ; Miča, Lumír (advisor)
Text of an abstract. The aim of the Bachelor’s thesis is design and assessment of the supporting "hypothetical" excavation pit in Neogene Brno clay. The pit is situated near the swimming stadium Za Lužánkami, where subsoil is formed this type of soil. This area is also marked as landslide area. In the first part of the thesis evaluation of the geological and geotechnical conditions is presented. Design and evaluation of the selected supporting system (two times anchored pile wall) cross-section to fulfill the Ultimate Limit State and Serviceability Limit State is described in the third part. The computational program GEO5 Sheeting Design was used to determination of required embedded depth of the wall, number of anchors and internal forces. The assessment of the first limit state of the construction was made partly by hand and partly with the help of the software application. The determination of horizontal movements of pile wall was performed via GEO5 Sheeting Assessment. External stability was analyzed using GEO5 Stability. The last section gives description of the technological construction plan.
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Securing the pit in over-consolidated clay
Svobodová, Nikola ; Chalmovský, Juraj (referee) ; Miča, Lumír (advisor)
Text of an abstract. The aim of the Bachelor’s thesis is design and assessment of the supporting "hypothetical" excavation pit in Neogene Brno clay. The pit is situated near the swimming stadium Za Lužánkami, where subsoil is formed this type of soil. This area is also marked as landslide area. In the first part of the thesis evaluation of the geological and geotechnical conditions is presented. Design and evaluation of the selected supporting system (two times anchored pile wall) cross-section to fulfill the Ultimate Limit State and Serviceability Limit State is described in the third part. The computational program GEO5 Sheeting Design was used to determination of required embedded depth of the wall, number of anchors and internal forces. The assessment of the first limit state of the construction was made partly by hand and partly with the help of the software application. The determination of horizontal movements of pile wall was performed via GEO5 Sheeting Assessment. External stability was analyzed using GEO5 Stability. The last section gives description of the technological construction plan.
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Influence of clay fraction on residual strength of soils
Bočková, Kateřina ; Boháč, Jan (advisor) ; Najser, Jan (referee)
This bachelor thesis studies the influence of clay fraction on the residual strength of soils. The introductory part of the thesis outlines the topic of residual strength in soil mechanics. The main part contains a review of research papers that studied the influence of clay fraction on the residual strength of soils. The information from the review is summarized and used in the design of laboratory experiments. A series of ring shear tests were conducted on (i) clay fraction from the "Dobkovičky" area, (ii) sand from the Střeleč quarry and (iii) their mixtures. The experimental results correspond with the reviewed papers: the correlation between the residual strength and the content of the clay fraction is, without the knowledge of mineralogical compostition, insufficient. Therefore, the ring shear test is the most reliable method of determining the residual strength.
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