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Numerical analysis of tailing dam with calibration based on genetic algorithm and geotechnical monitoring data

Grosel Szczepan

Studia Geotechnica et Mechanica

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2021

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Vol. 43, nr 1

34--47

EN

The article presents a method of calibration of material parameters of a numerical model based on a genetic algorithm, which allows to match the calculation results with measurements from the geotechnical monitoring network. This method can be used for the maintenance of objects managed by the observation method, which requires continuous monitoring and design alterations. The correctness of the calibration method has been verified on the basis of artificially generated data in order to eliminate inaccuracies related to approximations resulting from the numerical model generation. Using the example of the tailing dam model the quality of prediction of the selected measurement points was verified. Moreover, changes of factor of safety values, which is an important indicator for designing this type of construction, were analyzed. It was decided to exploit the case of dam of reservoir, which is under continuous construction, that is dam height is increasing constantly, because in this situation the use of the observation method is relevant.

2

Philosophy of geotechnical design in civil engineering – possibilities and risks

Bogusz W., Godlewski T.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2019

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Vol. 67, nr 2

289--306

EN

The European standards, developed extensively over last 30 years, are driven by the need for continuous evolution and their Authors’ pursuit of better EU-wide quality in civil engineering – combining safety, economy, and sustainable development. The adoption of theory of reliability as the basis for design has played a major role in shaping current geotechnical practice. However, it requires from practitioners a greater understanding of underlying uncertainties. Furthermore, a number of alternative approaches, not generally used in structural design, are also allowed, as some situations in geotechnical engineering require an individual approach. Moreover, the current trends in geoengineering increase the importance of risk assessment and management. The paper presents general philosophy guiding the geotechnical design and pointing to some of the ideas introduced by Eurocode 7 and its requirements, in relation to preexisting practice of geotechnical design in civil engineering.

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Metoda obserwacyjna i monitoring geotechniczny w świetle przepisów prawa do oceny zachowania podłoża i konstrukcji inżynierskich

Borecka A., Stopkowicz A., Sekuła K.

Przegląd Geologiczny

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2017

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Vol. 65, nr 10/2

685--691

EN

The observational method is one of the designing methods specified in Eurocode 7. It is recommended when the subsoil behavior prediction is difficult. Geotechnical monitoring is an integral part of the observational method. It can be also used for evaluation of subsoil and/or construction conditions at every investment stage. The article presents compulsory law regulation, standards and literature analysis in terms of using the observational method and geotechnical monitoring.

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Postural assessment in pen-and-paper-based observational methods and their associated health effects: a review

Sukadarin E. H., Deros B. M., Ghani J. A., Nawi N. S. M., Ismail A. R.

International Journal of Occupational Safety and Ergonomics

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2016

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Vol. 22, No. 3

389--398

EN

Introduction. This review describes standardized ergonomics assessment based on pen-and-paper observational methods for assessing ergonomics risk factors. Objective. The three main objectives are to analyze published pen-and-paper observational methods, to extract and understand the risk levels of each method and to identify their associated health effects. Methodology. The authors searched scientific databases and the Internet for materials from 1970 to 2013 using the following keywords: ergo, posture, method, observational, postural angle, health effects, pain and diseases. Postural assessments of upper arms, lower arms, wrists, neck, back and legs in six pen-and-paper-based observational methods are highlighted, extracted in groups and linked with associated adverse health effects. Results. The literature reviewed showed strengths and limitations of published pen-and-paper-based observational methods in determining the work activities, risk levels and related postural angles to adverse health effects. This provided a better understanding of unsafe work postures and how to improve these postures. Conclusion. Many pen-and-paper-based observational methods have been developed. However, there are still many limitations of these methods. There is, therefore, a need to develop a new pen-and-paper-based observational method for assessing postural problems.

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Wyznaczanie parametrów geotechnicznych podłoża w metodzie obserwacyjnej

Gorska K., Wyjadłowski M.

Materiały Budowlane

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2013

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nr 3

74--75

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Zastosowanie metody obserwacyjnej przy bezpiecznym wznoszeniu budowli geotechnicznych na przykładzie Obiektu Unieszkodliwiania Odpadów Wydobywczych Żelazny Most

Romaniuk D., Sorbjan P., Stefanek P.

Cuprum : czasopismo naukowo-techniczne górnictwa rud

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2013

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nr 1

101-111

PL

Metoda obserwacyjna (ang. Observational Method) w geotechnice została wprowadzona przez Terzaghiego i Pecka [5] w połowie XX w. Od tego czasu jest stosowana przy projektowaniu i wznoszeniu budowli geotechnicznych. Jest to ciągły proces integrujący wiele elementów z zakresu projektowania i budowy. Metoda obserwacyjna opiera się na gromadzeniu i analizie danych uzyskanych z ciągłego monitoringu, badań terenowych i laboratoryjnych oraz modelowania numerycznego. Uzyskiwane na bieżąco informacje pozwalają ocenić parametry geotechniczne i aktualne warunki, zarówno samej budowli, jak i jej podłoża. W związku z tym możliwa jest szybka reakcja na zachodzące zmiany, a tym samym korekta rozwiązań projektowych, co ważne, na etapie trwania samej budowy. Miejsce metody obserwacyjnej w praktyce inżynierskiej, potwierdza włączenie jej założeń do wytycznych zawartych w Eurokodzie 7 [1]. W Polsce przykładem wykorzystania metody obserwacyjnej jest Obiekt Unieszkodliwiania Odpadów Wydobywczych (w skrócie OUOW) Żelazny Most, którego eksploatacja trwa nieprzerwanie od 35 lat. Niniejszy artykuł ma za zadanie przybliżyć zasady działania metody obserwacyjnej w przypadku zapewnienia stateczności obwałowań OUOW Żelazny Most.

EN

The Observation Method (in short OM) in geotechnics was introduced by Terzaghi and Peck [1], in the middle of the twentieth century. Since then, it is widely used, in the designing and construction of geotechnical structures. OM is a continuous process of integrating many elements of designing and construction process. OM is based on the collection and analysis of data obtained from continuous monitoring, field and laboratory tests and numerical modelling. Information obtained up to date allow to assess geotechnical parameters and current conditions, both for the building and in its foundation ground. Therefore, it is possible to respond rapidly to the changes, and therefore the correction of design solutions, which is important, already on the stage of the construction. Development and position of the OM in engineering practice, confirmed inclusion of its principles in the guidelines of Eurocode 7 [2]. In Poland, an example of its use is the Żelazny Most Tailings Storage Facility (in short TSF), which exploitation lasts for 35 years. This article introduces the principles of OM in the case of ensuring the stability of Żelazny Most TSF dams.

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O projektowaniu obudów głębokich wykopów metodą obserwacyjną

Gajewska B., Kłosiński B.

Inżynieria i Budownictwo

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2010

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R. 66, nr 11

593-597

PL

Istota metody polega na możliwości modyfikacji rozwiązania projektowego w trakcie wykonywania obiektu budowlanego, z uwzględnieniem danych uzyskiwanych na podstawie pomiarów i obserwacji w trakcie wykonywania konstrukcji. Metoda jest zalecana zwłaszcza w przypadkach, gdy zachowanie konstrukcji jest trudne do przewidzenia na podstawie dostępnego rozpoznania podłoża gruntowego. Omówiono zasady stosowania metody wynikające z ustaleń Eurokodu 7 i praktyki inżynierskiej.

EN

The Observational Method enables corrections and improvements of a design solution during construction process, based on data from measurements and observations on a structure. The OM method is particularly recommended when behaviour of the designed structure is difficult to predict on the basis of site investigation on hand. Rules of using of the OM following from Eurocode 7 and engineering practice are described.