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Application of probabilistic methods in geomechanics
Suchomel, Radek ; Mašín, David (advisor) ; Šejnoha, Jiří (referee) ; Pruška, Jan (referee)
Three probabilistic methods of different complexity for slope stability calculations are in this work evaluated with respect to a well-documented case study of slope failure in Lodalen, Norway. A finite element method considering spatial random fields of uncorrelated parameters cohesion and friction angle is taken as a reference for comparison with two simpler methods based on Taylor series expansion, known as first-order-second-moment methods. It is shown that the FOSM method enhanced by a reduction of variance of input parameters due to spatial averaging along the potential failure surface leads to a significant improvement in predictions. This method is computationally inexpensive and can be used in combination with any existing finite element code, it is thus a useful approximate probabilistic method for geotechnical practice. Several limitations of the extended method for calculating probability of a slope failure are identified. An advanced hypoplastic constitutive model is used in probabilistic analyses of a typical geotech- nical problem, strip footing. The model, including horizontal and vertical correlation lengths, was calibrated using a set of experimental data on sand from horizontally stratified deposit. Some parameters followed normal, whereas other followed lognormal distributions....
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Reference points distance measurement
Jedlička, Petr ; Čížek, Martin ; Staš, Lubomír ; Malík, Josef
The device is developed for measuring the deformation of natural and artificial underground spaces, especially active mines. The deformations are derived from LIDAR distance measurements of network of reference points. Each reference point consists of steel rod embedded into wall and stainless steel ball as reflector. The LIDAR is placed in a precision adjustable 2-axis mount and which can be fitted to any reference point. The system is portable, battery powered. Part of the system is software allowing reading and processing LIDAR measurement data. The measurement is usually started immediately after excavation, and then go on as long-term monitoring after the completion of the construction or mining activities.
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Progress report on the project VIII/2013 Quality Assessment HM and geotechnical exploration plan for the construction of underground gas storage Milasín-beech - List of works on the project and an evaluation of the results for the third quarter of 2013
Souček, Kamil ; Koníček, Petr ; Vavro, Martin ; Staš, Lubomír ; Ptáček, Jiří ; Vavro, Leona ; Waclawik, Petr ; Georgiovská, Lucie ; Patočka, M.
Based on Contract No. G1042011 with the client fy DIAMO state enterprise Stráž, branch GEAM Lower Rožínka was prepared this interim report, which summarizes the list of works, presents and assesses the findings and results for the period July to September 2013, concerning the evaluation of rock mass quality and geotechnical survey was intended to build an underground gas storage facility.
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Progress report on the project VI/2013 Quality Assessment HM and geotechnical exploration plan for the construction of underground gas storage Milasín - Bukov - List of works on the project and an evaluation of the results for the first quarter of 2013
Souček, Kamil ; Koníček, Petr ; Vavro, Martin ; Staš, Lubomír ; Ptáček, Jiří ; Vavro, Leona ; Waclawik, Petr ; Georgiovská, Lucie ; Patočka, M.
Based on Contract No. G1042011 with the client fy DIAMO state enterprise Stráž, branch GEAM Lower Rožínka was prepared this interim report, which summarizes the list of works, presents and assesses the findings and results for the period January-March 2013, concerning the evaluation of rock mass quality and geotechnical survey was intended to build an underground gas storage facility.
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Progress report on the project VII/2013 Quality Assessment HM and geotechnical survey for construction of an underground gas storage Milasín - Bukov - List of works on the project and the achieved results for the second quarter of 2013
Souček, Kamil ; Koníček, Petr ; Vavro, Martin ; Staš, Lubomír ; Ptáček, Jiří ; Vavro, Leona ; Waclawik, Petr ; Georgiovská, Lucie ; Patočka, M.
Based on Contract No. G1042011 with the client fy DIAMO state enterprise Stráž, branch GEAM Lower Rožínka was prepared this interim report, which summarizes the list of works, presents and assesses the findings and results for the period April-June 2013, on the evaluation of rock mass quality and geotechnical survey was intended to build an underground gas storage facility.
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