Hollow prestressed concrete (HPC) girder and spliced hollow prestressed concrete girder (S-HPC) bridge construction method
A concrete beam, prestressed technology, applied in bridge construction, bridges, buildings, etc., can solve the problems of difficult to configure steel wire, increased weight, low bearing capacity, etc. effect of feeling
Inactive Publication Date: 2011-05-04
韩万烨
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Problems solved by technology
Therefore, since the installation position of the anchor device is not free, it is difficult to dynamically and efficiently arrange the steel wires for the entire beam
[0006] Moreover, since the conventional girder bridge has a closed structure of the main part, not only the weight increases, but also the bridge has a low resistance to loads such as wind or water acting in the direction perpendicular to the girder
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[0035] Hereinafter, hollow prestressed concrete girders and methods for constructing hollow prestressed concrete spliced girder bridges according to various embodiments of the present invention will be described with reference to the accompanying drawings.
[0036] Referring to FIG. 1 , the main body of the hollow prestressed concrete beam according to the embodiment of the present invention is formed with a plurality of holes 2 to reduce the weight of the I-shaped beam 1 . The hole 2 may be circular or oval as shown in FIGS. 7 and 15 , rectangular as shown in FIGS. 8 and 14 or triangular as shown in FIGS. 9 and 16 . In addition, the hole 2 may have various shapes, such as a polygon.
[0037] The hole 2 can reduce the weight of the I-shaped beam 1, and the magnitude of weight reduction corresponds to the volume occupied by the hole 2. In addition to the holes 2 shown in the figures, the holes 2 may be formed in various shapes, such as a combination of circular and polygonal...
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Provided is a hollow prestressed concrete girder for forming an I-type prestressed concrete girder bridge, in which at least one hole is formed in a body portion of the I-type prestressed concrete girder. A spliced hollow prestressed concrete girder bridge, in which a plurality of holes are formed in a body portion of the girder to reduce the weight of the girder, is constructed by carrying a plurality of spliced girders manufactured in a factory to a construction site, assembling the spliced girders in the construction site, first tensing steel wires installed at the entire girder, reinforcing a connection portion between spliced members by a steel rod or steel wire which is connected by welding or using a coupling or anchoring device at the spliced portion that connecting the spliced girders, installing the assembled girders that are first tensed on a pier, installing a continuous steel wire for connecting the installed spliced girders for a continuous bridge, pouring slab in the upper portion of the installed spliced girders, after the slab is cured, second tensing steel wires that have not tensed or the tensed continuous steel wire, and when cracks are generated or excessive sagging occurs after the bridge is constructed, additionally tensing the steel wires.
Description
technical field [0001] The invention relates to a hollow prestressed concrete beam and a method for building a hollow prestressed concrete spliced beam bridge, more specifically, to a hollow prestressed concrete beam that can greatly increase the span of the beam and a method for building a hollow prestressed concrete beam bridge. A method for splicing girder bridges with prestressed concrete. Background technique [0002] In general, I-type prestressed concrete girder bridges with I-shaped sections are one of the cheapest and widely used bridges worldwide. However, for I-beam bridges, when the length of the girder exceeds 40-50 meters, the length and weight of the girder will increase, making all processes such as manufacturing, handling, and installation of the girder very difficult. Therefore, for concrete box girders, bridges are constructed by joining multiple spliced parts as short as 2-3 meters. [0003] In traditional I-beam bridges, since most of the steel wir...
Claims
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IPC IPC(8): E01D2/00
CPCE01D2/02E01D21/00E01D22/00E01D2101/28
Inventor 韩万烨
Owner 韩万烨