No description available.

[pt] O presente trabalho investigou o comportamento mecânico do concreto projetado com fibras aplicado nas escavações da mina Cuiabá e o seu controle tecnológico através do ensaio de duplo puncionamento. Para essa pesquisa utilizouse o traço desenvolvido pelos engenheiros da mina Cuiabá com dois tipos diferentes de fibra sintética e uma fibra de aço. Inicialmente, caracterizou-se o material compósito através de ensaios de flexão em prismas (EN 14651) e de arrancamento. Em seguida, os resultados obtidos foram utilizados em conjunto com os ensaios de flexão em painéis circulares (ASTM C1550), quadrados (EN 14488-5) e de larga escala para o dimensionamento do sistema de suporte utilizado na mina Cuiabá. As frações mais baixas de fibras sintéticas são mais indicadas nos locais onde a qualidade da rocha é razoável ou boa, enquanto as fibras de aço podem ser aplicadas onde a qualidade do maciço rochoso é classificada como muito fraca. Em relação ao controle tecnológico do concreto com fibras, os ensaios de duplo puncionamento realizados em máquinas mais rígidas são mais eficientes em diminuir a extensão da instabilidade pós-fissuração, limitar os erros nas correlações com os ensaios de flexão (EN 14651) e em reduzir a variação das propriedades mecânicas do material. A aplicação do ensaio de duplo puncionamento com controle fechado pela corrente extensométrica foi o método mais efetivo em limitar a instabilidade pós-fissuração independente da máquina de ensaios selecionada. / [en] The present work investigated the mechanical behavior of the fiber reinforced shotcrete applied at the Cuiabá mine excavation and its quality control through the double punch test. For this research, the mix composition was developed by Cuiabá mine Engineers with the addition of two different types of synthetic fibers and one steel fiber. Firstly, the cement based composite was studied at the material level through bending (EN 14651) and pullout tests. Thereafter, the support system of the Cuiabá mine excavation was designed based on round (ASTM C1550), square (EN 14488-5) and large scale panel tests. The application of lower synthetic fiber volume fractions was more suited for the areas with good quality rock indexes, while steel fibers were better suited at field with lower rock classes. Regarding the quality control of FRC, the double punch tests that were conducted in stiffer testing machines were more effective in reducing the post-peak instability, in limiting the errors in the correlations with bending tests (EN 14651) and in reducing the mechanical properties variations of the material. Finally, the application of the double punch test with closed-loop control of the circumferential extensometer turned to be the most effective method in limiting the post-peak instability regardless of the selected machine.

My thesis follows up life and work of Bohumil Schweigstill, teacher and puppeteer living in First Republic of Czechoslovakia. First chapter is about social situation in Příbram, about his childhood and studies in this famous mining area. Then it focuses on the beginning of his career as a teacher at Klatovsko and subsequent move to Prague, where until the end of the 30s of the 20th century has taught at several schools. Thesis then makes a closer look at his puppeteering work in Prague theater in Vladislavova street and theatre in the garden of Kinský, monitors normal operation of both theatres, structure of performances, ensemble and repertoire. Stand-alone chapter is devoted to Schweigstill's dramas and its benefit for forms of puppet - Punch, because he was one of the first to come up with a brand new concept. The final chapter then examines his tenure at the magazine Little Reader and Heart, as well as end of his life, where despite leaving both of its own puppet theaters, he didin't hesitate to help other amateur and professional theatre groups, and finally the overall contribution that Schweigstill's playwright and theatrical activity had. Key words Bohumil Schweigstill, puppet theater, marionette, puppetry, Punch, the Kinsky Garden Theatre, the Theater at Vladislavova Street, the Society for...