Metal bellows of prestressed anchors are also known as metal bellows, metal spiral pipes, concrete filling pipes and anchor bolt bellows. The metal spiral pipe is made of high quality steel strip, which is made of round and flat bellows by rolling corrugation, coil forming, biting and cutting. Prestressed bellows are necessary for prestressed concrete structures because prestressed concrete structures are used more and more in buildings.
Products are used in Bridges, multi-storey factories, parking lots, office buildings, apartment buildings, stadiums and other large buildings.
In modern architecture, it has been widely used in Britain, France, the United States, Japan and other developed areas. It is light weight, thin wall, strong rigidity, does not break, does not leak. Due to the obvious concave and convex double wave on the surface of the pipe, the joint of the steel pipe is tightly embossed and firmly does not trip. After site pouring, contact with concrete, strong wrapping force, complete integration with concrete, strengthen the seismic performance of the structure. Compared with ordinary solid plate, its excellent function, light weight, large span, small deflection, no column cap, good stability, low comprehensive cost, improve the building headroom, increase the use and sales area. Compared with the existing ordinary beam, vertical beam structure, concrete elevator, solid
Bellows type: Bellows are mainly divided into metal (stainless steel, carbon steel) bellows and plastic bellows. Metal bellows are mainly used to compensate pipe thermal deformation, shock absorption, absorption pipe settlement deformation and so on. Widely used in petrochemical, instrument, aerospace, chemical, electric power, cement, metallurgy and other industries. Other materials, such as complex materials, bellows play an irreplaceable role in media transmission, power threading, machine tools, household appliances and other fields. Metal bellows are used for thermal expansion and cold contraction pipes.
Application range of metal bellows: suitable for heat conduction oil, toxic, flammable, permeable, environmental pollution, good radioactive fluid medium pipeline as a cut-off valve, can also be used for regulation. It is a high quality product that creates a leak-free plant.
1, strength and light: steel strength is high, and can use ripples to improve mechanical properties; Small structure size, light weight.
2, excellent performance: good annular rigidity and axial flexibility, strong deformation resistance, strong basic adaptability, can meet the special requirements of bad geology; The soil-steel interaction makes the structure reasonably stressed and the load distribution uniform, which greatly improves the long-term performance and seismic resistance of the structure. And there is no concrete shrinkage creep and temperature change cracking.
3, durability: a large number of engineering examples show that the service life of galvanized corrugated steel plate (pipe) can reach 50%. ~ 100 years, the current 100-year-old structure is still in service.
4, fast: factory processing and on-site assembly are implemented separately, greatly shortening the construction period (more than half); And the construction is not affected by temperature and bad conditions, extending the construction period.
5, easy: transportation and field splicing construction do not require large mechanical equipment, most of the splicing only need manual operation. The construction is convenient and quick, the operation is convenient, which is conducive to reducing the cost and controlling the quality.
6, province: Engineering practice shows that the cost of corrugated steel plate (pipeline) bridge and culvert engineering is lower than that of reinforced concrete or engineering Bridges and culverts with the same span; Especially for the poor geological and topographic areas, the economic benefits are more considerable.
7, strong applicability: corrugated steel plate (pipeline) bridge and culverts can be applied to a variety of complex terrain and geological conditions, especially for special areas and earthquake prone areas, such as frozen soil, expansive soil, soft soil, collapsible loess, high fill, goaf and so on.
8, avoid wrong platform jumping: the uneven settlement caused by the stiffness difference of the bridge head is conducive to improving the "wrong platform jumping" phenomenon at the junction of the embankment structure and the embankment, and improve driving comfort and stability.
9, environmental protection, low carbon: reduce or fundamentally abandon cement, wood, sand and other conventional building materials, reasonable use of waste soil (slag), small damage to the environment, small noise and vibration, conducive to environmental protection, reduce carbon emissions.
10, less maintenance: galvanized corrugated steel plate (pipeline) corrosion resistance, the structure does not need to set expansion joints, supports and other vulnerable parts, so in the later operation almost no need to maintain the structure.
11, easy to replace: without interrupting traffic, it is very convenient to replace and strengthen the new tube (arch) of the internal hoop, so that it radiates a new life.
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