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Wyszukujesz frazę "CIPP" wg kryterium: Wszystkie pola


Wyświetlanie 1-6 z 6
Tytuł:
Results of laboratory tests of concrete, vitrified clay and PVC sewer pipes with CIPP liners
Wyniki badań laboratoryjnych przewodów kanalizacyjnych betonowych, kamionkowych i z PVC z powłokami CIPP
Autorzy:
Kuliczkowski, A.
Mogielski, K.
Powiązania:
https://bibliotekanauki.pl/articles/402026.pdf
Data publikacji:
2012
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
CIPP
cured-in-place-pipe
epoxy resin
sewer pipes
renovation
reconstruction
żywica epoksydowa
rury kanalizacyjne
renowacja
rekonstrukcja
Opis:
Results of load capacity tests of concrete pipes DN 200 and 300 and vitrified clay pipes DN 200, 250 and 300 with liners and without them were shown together with results of ring stiffness tests of PVC pipes DN 200, 250 and 315 and CIPP liners DN 200, 250 and 315. All pipes and liners used to produce samples were brand new. The tested liners were made of polyester tube saturated with epoxy resin. Preliners were not installed between liners and pipes. The liners were introduced to the pipes using compressed air and cured with hot water. Main aim of the research was to find out if there is any correlation between roughness of the pipe surface (depending on the pipe material) and load capacity growth after pipe rehabilitation due to the sticky properties ofthe resin used for tube impregnation. Another subject discussed in this paper is the influence of adhesion level between liner and PVC pipe to ring stiffness growth of this pipe. Relationship between adhesion level and growth of load capacity/ring stiffness will be proven. Adhesion level should be taken into consideration when designing the reconstructive liner designed not only to seal and protect the pipeline, but also to strengthen construction of the pipe.
Źródło:
Structure and Environment; 2012, 4, 3; 23-34
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the structure of liners used for the modernisation of brick collectors
Autorzy:
Wysocki, Leszek
Madryas, Cezary
Grosel, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2037687.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
brick sewer
renovation
CIPP liner
modernization of brick sewers
Opis:
Brick sewers were designed as egg-shaped, pear-shaped, bell-shaped, vaulted, and even rectangular (sometimes with granite ceilings and floor slabs). In exceptional cases, circular sections were also made of brick. Efforts were made in order to ensure optimal flow conditions, and also that the cross-section was adapted to the shape of the rock mass pressure line. This is due to the fact that the most advantageous shapes for masonry collectors are shapes in which no tensile stresses will occur in any part of the cross-section under the influence of external loads. Nevertheless, sewage conduits degrade over time. The boundary conditions of their use also change, which affects the magnitude of mechanical and hydraulic loads. Further use of a sewer in such a case requires its renewal, and less frequently, modernization that results from the necessity to change its function. This is usually done by introducing a new conduit into the interior of the renovated or modernized sewer, which in literature is called a liner. The aim of the analysis was to determine the thickness of the liners that strengthen the structures of brick channels with an inverted egg cross-section and with dimensions of 1050 × 700 mm, which are intended for gravitational sewage systems. The analysis included the performance of variant static and strength calculations for the assumption that the conduit after its modernization will be replaced with a conduit operating in the pressure system, which is a very rare requirement. It was assumed that the best solution would be to use a CIPP (Cured In Place Pipe) liner.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, s1; 501-509
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory tests and analysis of CIPP epoxy-resin internal liners used in pipelines – part I: comparison of tests and engineering calculations
Autorzy:
Abel, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1845172.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
no-dig technology
laboratory test
close-fit lining
sewer rehabilitation
Opis:
Tests that were carried out in order to obtain knowledge of the actual values of strength parameters obtained by CIPP liners that are used to repair pipelines. Specimens of liners made of high quality polyester felt cured with epoxy resin were subjected to tests. The scope of the performed studies corresponded with the scope of acceptance tests, which are carried out in the investment process during quality control of renovation works. Specimens of liners taken from sewers with 3 different diameters, i.e. 200mm, 350mm and 500mm were selected as representative for underground sewage networks. The obtained results enabled the calculations carried out in the course of design work to be verified, and differences between the model values of the strength parameters obtained from the calculations, and real values that are burdened with irregularities resulting from the conditions prevailing at a construction site and which were obtained for specimens taken from their built-in locations to be compared. The tests confirmed that it is possible to renovate - using CIPP liners - sewers with a lot of structural and material damage that negatively affects a liner‘s geometry. The implementation of the reinforcing internal coating in a sewer enables its further safe operation. The direct application value of the research involves the enlargement and clarification of knowledge concerning the actual load-bearing capacity of CIPP liners.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, 2; 169-180
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory tests and analysis of CIPP epoxy resin internal liners used in pipelines – part II: comparative analysis with the use of the FEM and engineering algorithms
Autorzy:
Abel, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1845155.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
no-dig technologies
laboratory tests
close-fit lining
sewer rehabilitation
Opis:
In the case of underground network infrastructure it can be seen that objects functioning in the second technical condition, according to DWA-ATV 143-2, and subjected to rehabilitation with the use of close-fit trenchless technologies are capable of withstanding external loads. The main external load that is taken into account in engineering calculations in the case of conduits in the second technical condition is external groundwater pressure. In order to compare design parameters obtained with the use of various calculation methods, a comparative analysis was conducted in order to determine the values of critical pressure. The calculations were carried out using popular engineering algorithms. In addition, analyses using the Finite Element Method and Abaqus software as a computational tool were carried out for the purpose of verifying laboratory tests. This paper aims to broaden knowledge concerning the possibility of performing control numerical analyses for close-fit liners installed in pipelines that are in the second technical condition according to DWA-ATV 143-2. The analyses were carried out on ten 3D models. The models were parameterized in order to reflect the CIPP samples in the most accurate way. The computational models were built based on assumptions, which are commonly used in this type of scientific analysis, regarding material parameters and their interactions. The direct value of the performed engineering calculations and numerical analyses is the extension of knowledge in the field of strength parameters that are obtained by various material groups of close-fit liners. Comparative analysis of the results of laboratory tests and numerical analyses, and the conclusions that result from them, constitute the basis for the optimization of the design process and the individual approach to issues related to the use of liners that strengthen underground pipelines.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, 3; 307-322
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory tests and analysis of CIPP epoxy resin internal liners used in pipelines – part II: comparative analysis with the use of the FEM and engineering algorithms
Autorzy:
Abel, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1845143.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
no-dig technology
laboratory test
close-fit lining
sewer rehabilitation
Opis:
In the case of underground network infrastructure it can be seen that objects functioning in the second technical condition, according to DWA-ATV 143-2, and subjected to rehabilitation with the use of close-fit trenchless technologies are capable of withstanding external loads. The main external load that is taken into account in engineering calculations in the case of conduits in the second technical condition is external groundwater pressure. In order to compare design parameters obtained with the use of various calculation methods, a comparative analysis was conducted in order to determine the values of critical pressure. The calculations were carried out using popular engineering algorithms. In addition, analyses using the Finite Element Method and Abaqus software as a computational tool were carried out for the purpose of verifying laboratory tests. This paper aims to broaden knowledge concerning the possibility of performing control numerical analyses for close-fit liners installed in pipelines that are in the second technical condition according to DWA-ATV 143-2. The analyses were carried out on ten 3D models. The models were parameterized in order to reflect the CIPP samples in the most accurate way. The computational models were built based on assumptions, which are commonly used in this type of scientific analysis, regarding material parameters and their interactions. The direct value of the performed engineering calculations and numerical analyses is the extension of knowledge in the field of strength parameters that are obtained by various material groups of close-fit liners. Comparative analysis of the results of laboratory tests and numerical analyses, and the conclusions that result from them, constitute the basis for the optimization of the design process and the individual approach to issues related to the use of liners that strengthen underground pipelines.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, 3; 307-322
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of factors contributing to the risks of accident
Autorzy:
Prayogo, D.
Ndori, A.
Andromeda, V. D.
Kurnianing Sari, D.
Hartoyo, H.
Sulistiyowati, E.
Powiązania:
https://bibliotekanauki.pl/articles/2086299.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
safety at sea
safety training
risks of accdent
research and development
questionnaire method
CIPP model
basic safety training
Opis:
The study is research and development by utilizing the ex post facto approach. The research area is at the KM. Gunung Dempo. The research information was collected using a questionnaire method and then analyzed using evaluative analysis techniques via descriptive-quantitative analysis. This study is evaluative research with N-Gain. The data were collected through questionnaires and interviews. Valid data in the validity test results can be used for research. Two items of data were found to be invalid during the validity test. Result of N-Gain was 0.766 which was in high category, meaning that implementation of system model changed into suitable and powerful to enhance understanding. Result of t-test showed that t for statistical test was 93.398 with significance level = 0.000 (p<0.05), meaning that the model was effective. Drill Program implemented is in a good category. Correlation coefficient of pre-test and post-test was 0.878. Result of N-Gain was 0.766 which was in high category, meaning that implementation of Training application system version turned into top and powerful to enhance learning. Result of t-test showed that t for statistical test was 93.398 with significance level = 0.000 (p<0.05), meaning that the model was effective.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 1; 33--37
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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