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A comprehensive approach to the optimization of design solutions for dry anti-flood reservoir dams

Łydżba Dariusz, Różański Adrian, Sobótka Maciej, Pachnicz Michał, Grosel Szczepan, Rainer Jakub

Studia Geotechnica et Mechanica

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2021

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Vol. 43, nr 3

270--284

EN

The article proposes the methodology of designing dams of dry flood control reservoirs. The algorithm is developed so as to meet all the requirements given in the Eurocode 7 and, at the same time, to be efficient in terms of necessary calculation time. Furthermore, the presented numerical procedure enables the optimization of design solutions, e.g. the depth and length of the anti-filtration barrier, by means of parametric analyses. The approach assumes the use of numerical methods, in particular, finite element (FE) analysis. Three-dimensional (3D) reconstruction of the terrain topography and subsoil layer arrangement performed in step (1) sets the base for further analyses. In step (2), the filtration phenomena are assessed based on the 3D analysis of a transient groundwater flow. In step (3), the state of displacement is evaluated and the stability is verified for all the relevant phases of construction and operation of the facility, in particular, in the course of simulated flood detention. The analyses in step (3) are carried out on 2D models corresponding to the design cross-sections of the dam. This significantly reduces the computation time (compared to 3D analysis) and, at the same time, provides a safe estimate of factor of safety. The performance of the proposed algorithm is shown on the numerical examples of the computations concerning the dam of Szalejów Górny dry anti-flood reservoir located in Poland.

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Tunele kolejowe. Rewitalizacja, ocena stanu technicznego, projekt naprawczy, modelowanie numeryczne : problemy naukowo-techniczne

Łydżba Dariusz, Dróżdż Arkadiusz, Wątroba Paweł, Różański Adrian, Sobótka Maciej, Pachnicz Michał, Grosel Szczepan, Rainer Jakub

Geoinżynieria : drogi, mosty, tunele

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2021

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nr 2

92--102

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Analysis of underground stratification based on CPTu profiles using high-pass spatial filter

Rainer Jakub, Szabowicz Hubert

Studia Geotechnica et Mechanica

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2020

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Vol. 42, nr 4

355-365

EN

The issue of the stratification of the underground subsoil is one of the principal geotechnical challenges. The development of the Cone Penetration Tests (CPTu) has resulted in the possibility to record parameters in a quasi-continuous way, which provides a very detailed description of the soil response. Such accurate measurements may therefore be treated as a signal or image and be analysed as such. This paper presents the application of high-pass spatial filters to perform soil stratification on the basis of the static penetration test. The presented algorithm has been tested on the test data set provided by the Organizers of TC304 Student Contest on Spatial Data Analysis (September 22, 2019, Hannover, Germany). It provides reasonable results at negligible computational cost and is applicable to most soils, especially if the contrast between the parameters of the adjacent layers is significant.