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    Wyświetlanie 1-3 z 3
    Tytuł:
    Construction deviation control method of transverse super large inclined asphalt pavement
    Autorzy:
    Qi, Yongzheng
    Ma, Wengang
    Zhang, Jiesheng
    Powiązania:
    https://bibliotekanauki.pl/articles/27312134.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    poligon samochodowy
    pętla szybkich prędkości
    powierzchnia bardzo duża
    powierzchnia nachylona
    nawierzchnia drogi
    nawierzchnia asfaltowa
    odchylenie konstrukcji
    metoda kontroli
    automobile testing ground
    high speed loop
    super large surface
    inclined surface
    road surface
    asphalt pavement
    construction deviation
    control method
    Opis:
    The speed of test vehicles on the high-speed car track of the automobile test field is very high. Reducing the construction error of asphalt pavement is very important to ensure the safety of the test vehicle. In order to realize the paving of asphalt concrete pavement with super-large lateral inclination in the curve section of the high-speed car track in the automobile test field, a special paving control device and control method for the construction on the curve section with super-large lateral inclination were developed. Use the direction of the hanging hammer under the GPS device of paver to adjust the position of GPS device in real time, so that the geometric centre line of GPS device is always perpendicular to the horizontal plane. The reference control line is preset in the paver operation control device, and the lateral displacement deviation of the paver is adjusted to synchronize the data of the paver control device with the travel route. The precise control of the paver’s forward route is realized, the construction precision of the super-large inclined asphalt pavement on the high-speed car track of the automobile test field is achieved, and the construction efficiency is greatly improved. It has important reference value for similar projects such as automobile testing field and racing track.
    Źródło:
    Archives of Civil Engineering; 2023, 69, 2; 165--176
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on reinforcement technology of existing double-way curved arch bridge
    Autorzy:
    Zhang, Kexin
    Qi, Tianyu
    Xue, Xingwei
    Li, Yanfeng
    Zhu, Zhimin
    Powiązania:
    https://bibliotekanauki.pl/articles/1852535.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wzmocnienie
    most dwukierunkowy
    most łukowy
    most zakrzywiony
    zwiększenie przekroju
    efekt wzmocnienia
    croscross-section increasing
    reinforcement
    two-way bridge
    curved bridge
    arch bridge
    reinforcement effect
    Opis:
    Two-way curved arch bridges inherit the fine tradition of masonry structures, making full use of the advantages of prefabricated assembly, it adapts to the situation of no support construction and no large lifting machine and tools, and has the characteristics of convenient construction method and saving material consumption. In appearance, the two-way curved arch bridge has strong national cultural characteristics. The prefabricated components of the two-way curved arch bridge are fragmentary, complicated in bearing and poor in integrity. Most of the two-way curved arch bridges in service have been built for a long time and lack of maintenance and management. Increasing the cross-section reinforcement method is one of the two-way curved arch reinforcement methods. It has a significant effect, convenient construction, good rigidity and stability characteristics after the reinforcement. Through theoretical analysis, combined with a static load test results of the assessment of the bridge reinforcement effect. Through load test, it is found that the deflection of the arch rib after reinforcement is reduced by 9%~19% and the strain of the arch rib is reduced by 12%~22%. Through finite element calculation, the crack width of the reinforced arch rib decreases by 8.3%~14.2%. The results show that the stress and deflection are greatly improved by the method of increasing section.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 2; 581-595
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on sling replacement of concrete-filled steel tube arch bridge
    Autorzy:
    Zhang, Kexin
    Qi, Tianyu
    Xue, Xingwei
    Li, Yafeng
    Zhu, Zhimin
    Powiązania:
    https://bibliotekanauki.pl/articles/1852540.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rura stalowa wypełniona betonem
    most łukowy
    podwieszenie
    obliczenia symulacyjne
    monitorowanie
    concrete-filled steel tube
    arch bridge
    sling
    simulating computation
    monitoring
    Opis:
    Concrete-filled steel tube arch bridge is filled with concrete inside the steel tube. The radial constraint of the steel tube limits the expansion of the compression concrete, which makes the concrete in the three-way compression state, thus significantly improving the compressive strength of the concrete. At the same time, it can simplify the construction process and shorten the construction period. Since the rapid development of concretefilled steel tubular tied arch bridge in the 1990s, a large number of such Bridges have suffered from the defects of steel concrete, loose tie rod, and hanger rod rust, etc. Therefore, the reinforcement technology for various diseases has been studied, among which the reinforcement technology for hanger rod replacement is the most complicated and more difficult. As more and more bridges of this type enter the period of reinforcement, it is more and more urgent to study the reinforcement technology of suspenders. Taking a bridge that has been in service for 23 years as an example, this paper discusses the construction method and construction monitoring of replacing the suspender, so as to guide the construction monitoring of the bridge. Finally, the construction monitoring results of the bridge are given, which can provide reference for the replacement of the suspender of this type of bridge.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 2; 597-610
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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