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Wyświetlanie 1-15 z 66
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:
Application of thermography in engineering measurements
Autorzy:
Wróbel, A.
Powiązania:
https://bibliotekanauki.pl/articles/225027.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
termografia
pomiary inżynieryjne
pomiary geodezyjne
thermography
engineering measurements
engineering surveying
Opis:
- Existing thermographic equipment provides tools for quick and accurate recording of temperature distribution on object surfaces. - Usage of image analysis methods commonly used for photogrammetry and remote sensing provides tools for making accurate maps of temperature distribution on chosen, characteristic surfaces. - Documentation of thermal condition of new buildings should be a mandatory part of the post-construction documentation. - Real-world thermal resistance of buildings should be a factor during assertion of fulfilment of the architectural project and during valuation of buildings.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 409-416
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying non-standard instrumental solutions to examine vertical displacements in engineering constructions as examplified by the monitored supporting structure of a reactor
Autorzy:
Woźniak, M.
Jastrzębski, Sł.
Powiązania:
https://bibliotekanauki.pl/articles/224997.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
przemieszczenie pionowe konstrukcji
agregat chemiczny
aparat reakcyjny
reaktor
pomiary geodezyjne
vertical displacements of constructions
reactor
engineering surveying
Opis:
In measurements of vertical displacements of constructions, when direct access to checkpoints is very difficult or life threatening, one should apply the measuring technology which would fulfill accuracy requirements and yet avoid all the dangers. The technology in question could involve special code levelling staffs instead of classical solutions. The paper presents tests involving the above method in measuring deformations of the supporting structure of a chemical reactor right after a building disaster or in the trial load of a rebuilt structure. Examples of other positive applications of such a solution are also shown.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 404-407
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control measurements using motorized total stations and field computer
Autorzy:
Woźniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/224993.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
system pomiarowo-obliczeniowy
ATR
pomiary geodezyjne
automatic target recognition
Servo-TC System
engineering surveying
Opis:
In the area of measurements monitoring the position of checkpoints in space there are new instrumental solutions being developed: servo-motors, ATR (automatic target recognition), PR (power search), etc. These elements enable to accelerate the measuring process considerably, make the results more objective, help avoid target identification mistakes, introducing the possibility to conduct "continuous" measurements supervised by the operational system of an instrument or a field computer. The article presents the monitoring measurement results obtained by means of measuring systems built in the Institute of Applied Geodesy, under the author's supervision.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 387-393
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geodetic conditions of Warsaw underground extension
Autorzy:
Woźniak, M.
Budrewicz, C.
Powiązania:
https://bibliotekanauki.pl/articles/224995.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Metro Warszawskie
rozbudowa metra
pomiary geodezyjne
Warsaw underground
underground railway system
underground extension
engineering surveying
Opis:
The construction of an underground railway system is a very demanding building investment. It requires great concentration of a building potential over an exceptionally vast area. On the one hand, the building site covers a vast densely built-up urban area and on the other, a tunnel is actually excavated over a small space covered by its "front" and interior. The above conditions are extraordinary both because of the technical difficulties of the works to be carried out and high precision required by individual construction elements. Another problem is the disturbance of geotechnical stability of the ground and the ensuing dangers posed for the adjacent buildings. The paper presents all basic elements of geodetic activities connected with the underground construction, from the designing stage up to construction works.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 395-401
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation measurement of the roof construction of pavilion "z" at BRNO trade fair grounds
Autorzy:
Weigel, J.
Svabensky, O.
Soukup, F.
Powiązania:
https://bibliotekanauki.pl/articles/224991.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
dach
dach budowli
pomiary geodezyjne
roof
roof construction
pavillion "z"
engineering surveying
Opis:
Brno Trade Fair grounds belong to the largest ones in Czech Republic. Dominating the grounds is the ,"Z" pavilion of circular shape, covered over by steel grill dome with 93,5 m diameter. The pavilion was built up in 1958 after design of Prof. Lederer of Brno. BUT Department of geodesy had been measuring the deformations of the roof construction in course of the maintenance works in period December 2005 - July 2006. In course of altogether 8 measuring epochs the vertical and radial deformations of the construction caused by temperature changes, snow loading, and maintenance works influences had been determined. In the contribution the measuring methods employed, and the results of 8 epochs of the deformation surveys are presented.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 381-386
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of short-terms height changes of the Hans Glacier using quasi-continuous GPS observations
Autorzy:
Walo, J.
Adamek, A.
Puczko, D.
Powiązania:
https://bibliotekanauki.pl/articles/225003.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
system pozycjonowania obiektów
lodowiec Hans
wysokośc lodowca
pomiary geodezyjne
GPS satellite
Global Positioning System
Hans Glacier
glacier height
engineering surveying
Opis:
The analysis of the measurement results exemplifies very valuable information about the glacier behavior which glaciologists need to understand phenomena occurring on the glacier in different seasons. Beside the experiences collected during this experiment it will be the background to design similar investigations from survey technology and methodology point of view. Basing on these results and experiment analysis we can draw some conclusions: - In the period of the experiment the glacier surface felt down as much as 2 meters. This is the natural tendency and consequences of flowing down the glacier to the fiord and his ablation. - In the figures we could notice wavy nature of the phenomenon of the glacier surface which probably is connected with topography of the fiord bottom, ocean tides affected on the glacier front and some processes connected with the ablation water delivery to the glacier bed. This problem requires a detailed study based on environmental data. - The results of determined heights were periodically disrupted by atmospheric conditions (snowing, wind). - The GPS data used to follow the vertical velocity of the glacier surface let us to monitor the glacier with height accuracy. Also the automation of the survey and post-processing is possible. - There are some disadvantages of using this monitoring technology in surveys: one point of observations, influence of atmospheric conditions on the results of surveys, periodically hard access to equipment and not good enough way of installation of the satellite antenna on the glacier (ablation pole).
Źródło:
Reports on Geodesy; 2007, z. 1/82; 367-373
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
Tytuł:
Vessel traffic monitoring and information system; reasons of establishing and principles of operation
Autorzy:
Urbański, J.
Morgaś, W.
Kopacz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/225001.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
system ruchu statków
bezpieczeństwo morskie
flota handlowa
pomiary geodezyjne
vessel traffic
maritime safety
shipping
VTMIS
engineering surveying
Opis:
In this paper, an attempt has been made to present and discuss the main issues of the Vessel Traffic, Monitoring and Information System (VTMIS). The VTMIS is the regional system being now developed by the European Union for its maritime areas. The main objective of this System is to ensure the proper level of maritime safety and antiterrorist security.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 359-366
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of natural slopes and earthen constructions monitored by scanning technology
Autorzy:
Toś, C.
Wolski, B.
Zielina, L.
Powiązania:
https://bibliotekanauki.pl/articles/224999.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
skaning laserowy
spadek niwelacyjny
tachymetr
pomiary geodezyjne
laser scanning
natural slope
slope
tacheometer
scanning tacheometry
engineering surveying
Opis:
Scanning performance effect depends both on technical parameters of scanner and advancement of data processing procedures. Accuracy and reliability of model depends on grid density and edge identification efficiency. As visualisation purposes and architectonic designing need models different from ones used in structural analysis a working out the 3D model needs consideration of construction characteristics and exploitation as well as model application. The authors prove this thesis by presentation and analysis of two earthen objects viz. natural slope and geotechnical construction monitored by scanning tacheometry technology.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 353-358
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deterministic modelling of deformations as a tool for designing geodetic monitoring schemes
Autorzy:
Szostak-Chrzanowski, A.
Chrzanowski, A.
Bond, J.
Powiązania:
https://bibliotekanauki.pl/articles/225017.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
monitoring przemieszczeń
pomiary geodezyjne
monitoring of displacements
geodetic deformation monitoring
engineering surveying
Opis:
The design of geodetic deformation monitoring schemes requires decisions to be made regarding the optimal location, density, and accuracy of geodetic sensors and targets. All too often, however, the location of the instruments and accuracy of monitoring are decided upon without regard for the expected location and magnitude of the maximum deformations of the monitored object. This can lead to incorrect interpretations of the behavior of the investigated object. A more rigorous approach is to use deterministic (a-priori) modeling of expected displacements derived from the knowledge of the geometry of the object and its environment, causative factors (loads), properties of the material, and physical laws governing the stress-strain relationship. In order to demonstrate how deterministic modeling can be used to design a geodetic scheme for deformation monitoring, an open pit mine scenario was investigated. Finite element analysis was applied to the open pit mine to obtain a prediction model of deformations at various stages of the mine development.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 337-344
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:
The evaluation of geometric changes in special type structures by surveying methods on the example of the Spodek Dome in Katowice
Autorzy:
Szczerbowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/225013.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
teren górniczy
kopuła
fałd kopulasty
pomiary geodezyjne
mining area
dome
entertainment sport hall
engineering surveying
Opis:
The paper presents an example of surveying field works carried in the main hall of The Entertainment-Sport Hall in Katowice. Both the technology and program of surveying were determined by the main goal that was an evaluation of the main hall construction performance and enablement of periodic observations for displacement evaluation in future. The individuality of presented survey results analysis relates to the structure characteristic and knowingness about primary geometry properties of the construction that was affected by mining.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 326-335
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An attempt to apply tensor calculus to evaluate the deformation condition of vertical upper embankment zones for a landfill located in a mining area, based on satellite measurement results
Autorzy:
Szafarczyk, A.
Ulmaniec, M.
Borowiec, Wł.
Powiązania:
https://bibliotekanauki.pl/articles/225054.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
fotogrametria
geodezja górnicza
teren górniczy
eksploatacja górnicza
pomiary geodezyjne
photogrammetry
mine surveying
mining area
mining operation
landfill
engineering surveying
Opis:
Safe usage of post-flotation waste reservoirs (landfills) requires carrying periodical geodesic measurements in order to control their embankments' stability. This is particularly important if mining operations are performed under the landfill or in its neighbourhood. On the basis of the measurements results, various coefficients of the terrain deformation are determined and their values, together with the results of other observations, are used in order to evaluate the safety status of the facility further usage. The paper presents the results of experimental calculations, using satellite measurements of the landfill observation network fragment, including the middle zone of its embankments. 35 geometrical structures were selected in this zone, named "triangular rosettes". Vertices of relevant triangles are selected points the co-ordinates of which shall be determined with the satellite technology. Three annual cycles of GPS observations in the landfill controlled network were used in calculations, performed in 2004-2006. On the basis of the annual sets of point co-ordinates, periodical horizontal displacements of points making up the rosettes were determined. In turn, for the interior zone of each rosette, components of a two-dimensional deformation tensor were calculated, allowing for determining the values for horizontal extreme deformations and the directions of their occurrence in each rosette zone. Calculations were performed for three time periods: 2004-2005, 2005-2006 and 2004-2006. The results of evaluating the condition of horizontal deformations were presented against the background of mining operations performed in these time periods in the landfill region, as well as against the background of settlements in the analysed points in relevant annual periods obtained from classical observations, realised by precision levelling technology.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 317-326
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial evaluation of usefulness of geodetic coordinates obtained with the use of RTK-GPS corrections generated by Malopolski Satellite Positioning System
Autorzy:
Siejka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/225052.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
system pozycjonowania obiektów
RTK GPS
pomiary GPS-RTK
Małopolski System Pozycjonowania Satelitarnego
technika RTK
pomiary geodezyjne
GPS satellite
Global Positioning System
real-time measurements
real time kinematic
Małopolski Satellite Positionning System
engineering surveying
Opis:
The paper presents attempt to find the answer to the question, if the experimentally functioning in Matopolska and Silesia system of reference stations is useful to determine geodetic coordinates, using real time technology when the final result of the measurement is known immediately. To obtain the aim multiple measurements were performed using the RTK-GPS technology on selected points of the POLFER network using corrections generated by the System. On a basis of empirical results of measurements, the evaluation of the usefulness of the system for geodetic applications was performed. Reference stations network of the system ASG-PL which was tested, is one of the so called terrestrial differential systems aiding measurements GPS-RTK (real time kinematic). Networks of the type are very often build in different countries and have national or even continental character.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 309-315
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 66

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