Geomatics and Environmental Engineering
Loading...
ISSN 1898-1135
e-ISSN: 2300-7095
Issue Date
2015
Volume
Vol. 9
Number
No. 3
Description
Journal Volume
Geomatics and Environmental Engineering
Vol. 9 (2015)
Projects
Pages
Articles
The role of testing technical features of concrete to assess predicted durability of massive reinforced concrete structures on the example of turbine set foundations
(2015) Barycz, Stanisław; Firek, Karol; Kocot, Wojciech
This article presents the tests, conducted in the years 1995-1996, of the technical condition of reinforced concrete bottom plates of turbine unit foundations, which were about 35 years old at that time. Based on the strength tests of concrete cores cut out from the foundation slabs, as well as sclerometric non-destructive testing, it was found that the compressive strength of the concrete corresponds to classes C16/20 and C20/25, which were required for this type of structure. The results of physico-chemical studies confirmed that for the conditions which these two bottom plates were placed in (with appropriate waterproof insulation), their durability was not compromised. The presented results of the research formed the basis for a decision to use both foundations as supports for the framework structure for new turbine sets, thus allowing for further 40 years of their utilization. Now, after nearly 20 years of use, they show no signs of wear and properly perform their role. The current technical condition of the turbine set foundations confirms that the decision made in the mid-90s was the right one, and the scope of the research which was then carried out can serve as an example of the course of action adopted for similar cases.
The issues on site surveying during the construction of a bridge span with the cantilever method
(2015) Firek, Karol; Kulpa, Anna
W artykule przedstawiono analizę metod realizacji zadań geodezyjnych w ramach obsługi budowy przęsła obiektu mostowego wznoszonego w technologii nawisowej. W przypadku budowy obiektu w tej technologii konieczna jest m.in. skomplikowana geodezyjna koordynacja montażu wózka rusztowaniowego oraz deskowania kolejnych segmentów przęsła. Podstawę opracowania stanowiły pomiary geodezyjne wykonywane w trakcie budowy mostu przez Wisłokę w miejscowości Łabuzie, prowadzonej w ramach modernizacji drogi krajowej nr 4 na odcinku Machowa – Łańcut.
An analysis and 3D visualization of shading of urban spatial objects with the use of the Phython programming language in the Blender application
(2015) Ilba, Mateusz
Shading analysis has been performed for several years. It is commonly performed on the basis of raster data with saved height attributes. An undoubted advantage of the application of raster is the speed and the easiness of the analysis but this solution has also many limitations. One of them is the impossibility of executing a correct analysis for a 3D city. The analysis performed only on raster data cannot answer the question, what happens to vertical elements of buildings and yet surfaces of these elements (walls) are far greater in big cities than horizontal and oblique ones, which we are able to save as raster images [11]. It is only recently that the tools are available, which make it possible to analyze the shading on 3D models. However, such tools have a lot disadvantages, they are expensive and have some limitations. On the example of the ArcGIS application, the following limitations can be enumerated: difficulties, while determining shadowed surfaces together with their classification, in the case of the Bentley Microstation V8i application, there is no influence on the output classification, the access to the generated data is carried out by displaying results. Additional software for these applications is created but it is payable and also does not give 100% control over the presentation of results. It is in this article that we will take a closer look at the feasibility of an analysis of shading of high urban buildings and its visualization using an algorithm for ray tracing that is available in the Blender application available under the GPL license. The author tested the work of the application on an example of an artificially built part of a 3D city and on a part of New York.
The electromagnetic-field effect of industrial origin on the cardio-vascular system of urban land inhabitants (illustrated with an example of Ivano-Frankivsk City, Ukraine)
(2015) Merduh, Ivan
Wzrost poziomu komfortu ludzi w miejskich ekosystemach społecznych doprowadził do tego, że coraz więcej czynników może wpływać na równowagę systemu „społeczeństwo-środowisko naturalne”, a tym samym na zdrowie ludzi. Wśród nich szczególne miejsce zajmuje wpływ promieniowania elektromagnetycznego (EMR) na organizm człowieka. W każdym punkcie na testowanej powierzchni pomierzono natężenie pola elektrycznego (E), natężenie pola magnetycznego (H) oraz gęstość powierzchniową strumienia energii (?). Do pomiarów wykorzystano tester Tenmars RF three-Axis Field Strength Meter TM-195. Na potrzeby badań medycznych i ochrony środowiska w wybranych punktach badanej powierzchni aglomeracji Iwano-Frankowska przeprowadzono, w jednym czasie, pomiary natężenia pola elektrycznego (E), pola magnetycznego (H) i gęstości powierzchniowej strumienia energii (?). Przeprowadzono pomiary akcji serca (HR), skurczowego ciśnienia tętniczego (S) i rozkurczowego ciśnienia tętniczego (D).
Building change detection from multitemporal airborne lidar data based on morphology and histogram
(2015) Piskorski, Radosław; Czernomysa, Ewelina
This publication provides an overview of methods that use multitemporal ALS data for the purpose of detecting changes in the building. Based on the proposed two-step solutions applied method based on the use of morphological filters and the analysis of the histogram. The proposed method has been tested on seven areas with different types of buildings. Morphological operators are used to detect the state of buildings in the studied period (2006 and 2012). On the basis of the substitution obtained maps, it obtained results showing the locations of the changes. After eliminating artifacts, presents an analysis of the accuracy characterized correctness building detection and detection of changes. In order to more precisely characterize the changes which are occurred, uses histograms created based on the elevation data. On the basis of their requested on the type of changes that have taken place in the area.