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    Wyświetlanie 1-4 z 4
    Tytuł:
    Measuring system for monitoring of concrete dam deformations
    Autorzy:
    Bryś, H.
    Mirek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/224422.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zapora
    zapora betonowa
    deformacja zapory
    pomiary geodezyjne
    dam
    concrete dam
    concrete dam deformation
    engineering surveying
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 39-45
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interconnection between monitoring and deterministic modeling of the behavior of large earth dams
    Autorzy:
    Szostak-Chrzanowski, A.
    Massiera, M.
    Chrzanowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/225009.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zapora ziemna
    zapora narzutowa
    monitoring przemieszczeń
    pomiary geodezyjne
    earth dam
    fockfill dam
    monitoring of displacements
    engineering surveying
    Opis:
    Monitoring of deformations, whether using geodetic or geotechnical instrumentation, besides providing a warning system in case of an abnormal behaviour of the dam, may be used as a tool for a verification of design parameters. By comparing results of monitoring measurements with a deterministic (a-priori) model of deformation, one may determine and explain causes of deformation in a case of unexpected behaviour of the investigated object and its surrounding. Thus, the role of monitoring becomes much broader than just the conventional determination of the status of the deformable object. On the other hand, a predicted behaviour of the dam may be used in designing the monitoring scheme, giving information on the magnitude and location of the expected maximum deformation parameters. In addition, with properly designed monitoring surveys, one may also determine the actual deformation mechanism. The discussed problems are illustrated by three types of earth dams located in California, USA, and in Quebec, Canada.
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 345-351
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of possibilities to use fern modelling in the process of modernisation of control networks for concrete dams
    Autorzy:
    Zaczek-Peplinska, J.
    Popielski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/225021.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zapora
    zapora betonowa
    metoda elementów skończonych
    FEM
    pomiary geodezyjne
    dam
    concrete dam
    finite elements method
    engineering surveying
    Opis:
    The paper presents analysis of possibilities to utilise results of modelling the work of concrete dam construction elements, obtained by means of the finite elements method (FEM), for the needs of modernisation of a control network. Such analysis should answer the question, whether - basing on the results of modelling with the use of currently controlled points of the object, as the network nodes, and pointing to zones (locations) of threats - it will be possible to formulate recommendations concerning the improvement of a set of controlled points and to perform related modifications of the existing control network.
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 417-423
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control network analysis of the dam "Wióry"
    Autorzy:
    Walo, J.
    Szpunar, R.
    Woźniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/225005.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zapora ziemna
    sieć kontrolna
    Wióry
    pomiary geodezyjne
    earth dam
    control network
    engineering surveying
    Opis:
    The obtained results of the test measurements in the control network of the dam Wióry show that combined usage of length measurements and GPS observations enables to obtain high accuracy and reliability in defining point coordinates. The real determination accuracy of checkpoint displacements in this type of networks is at the level of (plus minus) 2-3mm. However, it should be added that in small networks covering an area up to 1 km in radius, classical measurements (most of all, length measurements) enable to obtain higher accuracies in determining point coordinates, obviously on condition that the net structure is well-designed and length measurement is possible. Having analyzed the obtained results, one can also formulate the following conclusions: - the assumed structure of a modified test network shows effective accuracy both for EDM measurements and GPS observations, - satellite measurements enable combined and direct observation of points between which there is no sight line. It is especially important in the case of reference points which are usually located around the monitored object, and it is rarely possible to link them by means of classical measurements; - GPS measurements make it possible to check the monitored network independently, at least limiting the incidence of major and systematic errors in processing the results and defining displacement values; so GPS observations may, in the case of small control networks, be treated as control measurements made periodically (e.g. every year); - accuracy assessment made for TDA5005 tachymeter observations even in the case of considerable target inclinations, made by means of standard reflectors, attested reflexive foil and CCR fulfills monitoring requirements of specific point (targets), enabling to obtain an accuracy of the (plus minus) 0.5 mm range in relation to reference points; - linear measurements in the test network of Wiory, made by means of a TDA5005 tachymeter and high precision reflectors can be accomplished within 2-3 days.
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 376-380
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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