Wyniki wyszukiwania - BazTech

1

Impact of climate change on the safety of the foundation zone of steel tanks

Pawłowicz Joanna P., Skotnicka-Siepsiak Aldona, Szeląg Romuald A., Obolewicz Jerzy, Baryłka Adam

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

|

2024

|

Nr 1

13--22

EN

Climate change introduces the need to look at new issues in the safe operation of engineering structures. Analysis for the past decade has shown the significance of the weather changes taking place and the effects in the form of periodic long heat waves causing heating of external surfaces combined with solar radiation can cause significant structural impacts. Intense rainfall causing increased penetration of water into the ground also proves to be an important issue in terms of the proper condition of foundation zones. Performed studies have shown that in unfavorable conditions can lead to defects in the foundation zones of steel tanks.

2

On the use of Global Urban Footprint to the Polish settlement vectordatabase development

Brzezińska-Klusek Małgorzata

Geodesy and Cartography

|

2019

|

Vol. 68, no. 2

245--260

EN

Urbanization has a far-reaching impact on the environment, economy, politi-cal and social processes. Therefore, understanding the spatial distribution and evolution ofhuman settlements is a key element in planning strategies that ensure the sustainable de-velopment of urban and rural settlements. Accordingly, it is very important to map humansettlements and to monitor the development of cities and villages. Therefore, the problem ofsettlements has found its reflection in the creation of global databases of urban areas. Globalsettlement data have extraordinary value. These data allow us to carry out the quantitativeand qualitative analyses as well as to compare the settlement network at a regional, nationaland global scale. However, the possibility of conducting both spatial and attribute analysesof these data would be even more valuable. The article describes how to prepare raster dataso that they can be implemented into a vector database. It answers the questions whetherit is possible to combine these data with databases available in Poland and what benefits itbrings. It presents the methods of data generalization and the optimization of time and diskspace. As a result of the study, two vector databases with GUF data were developed. Thefirst database resolution is similar to the original (~12 m resolution) database, the seconddatabase contains less detailed (~20 m resolution) data, generalized using mathematicalmorphology. Both databases have been enriched with descriptive data obtained from theNational Geodetic and Cartographic Resource.

3

Numerical analysis of the response of pile-raft systems considering the application of cement and polypropylene fiber treatment

Hasanzadeh Ali

Architecture Civil Engineering Environment

|

2019

|

Vol. 12, no. 3

81--92

EN

Long-term performance of civil engineering projects mainly depends on the strength of underground layers. When the underground soil layers are problematic or have low bearing capacity and strength against the applied loads, application of soil stabilization methods can be effective. In this study, performance of pile-raft systems using stabilized/reinforced soil under foundation is investigated. For validation, the obtained numerical results were compared with the existing results from analytical and numerical analyses. Using the experimental data available in the literature, the variations of stiffness and strength parameters were simulated by three-dimensional finite element method and then foundation response was evaluated for each case. According to the obtained results, depending on the pile-raft configuration, different strategies of stabilization with cement, reinforcement with polypropylene fibers, or a combination of cement stabilization and fiber reinforcement can be employed to reduce the differential and maximum settlements of foundation and to improve the overall performance. In general, even though reinforcement with fibers has a positive influence on the tensile and shear strength of soil, the effect of cement stabilization on the design parameters of the foundation is more pronounced. Finally, an implementation of cost analysis of stabilization project was proposed to be conducted based on the applied materials and improvement/cost ratio.

4

Masyw skalny jako podłoże budowli

Kwiecień S., Sękowski J., Frogowski K.

Przegląd Geologiczny

|

2017

|

Vol. 65, nr 8

511--515

EN

The verification of limit states conditions of soil and foundation for an object constructed on bedrock requires a quantitative determination of the construction zone of influence. Due to time and cost factors, it is usually limited to boreholes performed in order to indicate the soil type and profile in terms of crackings. To determine the internal forces of the footing and construction for larger objects, especially statically indeterminate structures, it is crucial to know, e.g., the values of deformation and elasticity moduli. This paper presents the results of a number of tests performed to determine the stiffness of bedrock under silos in reconstruction. Trial loadings were performed and the settlement of soil under the adjacent construction was observed. Soil behaviour under the reconstructed silos was also monitored. Some of the results of the above-mentioned investigations served as the basis for back analyses carried out using the finite element method (FEM), in which stiffness parameters of rocky soil were determined. Based on the investigations and analyses, it was found out that the initial and secondary deformation moduli do not exceed the value of 230 MPa, which is at least a few times less than the elasticity moduli (455-1244 MPa). The analysis of internal forces in silos foundations, performed by the designer in order to indicate the stiffness of bedrock, resulted in the replacement of other 10 walls of the silos, without the necessity to modify the foundations.

5

Gardens and parks in the settlments of the unity of the Brethren in Lusatia, hesse and Silesia in the XVIII century (Herrnhut, Herrnhaag, Niesky, Nowa Sól, Godnów, Piława Górna)

Jagiełło M., Brzezowski W., Wowrzeczka B.

Czasopismo Techniczne. Architektura

|

2016

|

Y. 113, iss. 1-A

15--34

EN

The article presents the hitherto unexplored history of the Unity of the Brethren settlements, founded between 1722 and 1744 in Lusatia, Hesse and Silesia, with regard to public greeneries.

PL

Artykuł prezentuje niepodejmowane dotychczas w badaniach jako osobne zagadnienie dzieje osad braci czeskich, które w latach 1722-1744 założono na terenie Łużyc, Hesji i Śląska, w kontekście tworzonych na ich obszarze terenów zieleni publicznej.

6

Park Oruński - Historia ogrodu na przedmieściach Gdańska

Babnis K.

Wiadomości Konserwatorskie

|

1999

|

Nr 6

51--54