Support and Construction Method of Back-tensioning Load-bearing Construction of Bridge
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A construction method, reverse pull technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., to avoid the impact of floods, fast construction period, and simple equipment
Active Publication Date: 2015-11-11
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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Abstract
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[0008] The technical problem to be solved by the present invention is to provide a bridge anti-back pull load-bearing construction support and construction method, which can solve the load-bearing problem of beam body concrete cast-in-place construction, and at the same time, it is easy to obtain materials, simple equipment, fast construction period, and can avoid the impact of floods
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Embodiment 1
[0030] Such as figure 1 , 2 Among them, a bridge anti-back pull load-bearing construction support, including the abutment foundation 6, the tie rod column 3 is buried in the abutment foundation 6 through a plurality of steel plate bases 7, and the load-bearing ear plate 2 is buried on the side wall of the abutment foundation 6;
[0031] The steel bar load-bearing piece 1 and the diagonal brace 10 form a frame structure beam, one end of the frame structure beam is connected with the load-bearing ear plate 2 , and the upper end surface of the frame structure beam is connected with the tie rod column 3 through a plurality of tie rods 4 . With this structure, the concrete cast-in-place construction of the bridge girder body can be carried out on the entire construction support.
[0032] Preferably, the steel bar load-bearing sheet 1 is welded by a plurality of triangular strip steel bars. The diagonal brace 10 is an "X" shaped diagonal brace, which is used to overcome the left a...
Embodiment 2
[0037] On the basis of embodiment 1, a kind of construction method that adopts the bridge reverse pull load-bearing construction support described in claim 1~6 may further comprise the steps:
[0038] 1. During the construction of the abutment foundation 6, the steel plate base 7 is buried in the structural concrete of the abutment foundation 6, and the load-bearing ear plate 2 is welded and fixed with the steel plate base 7 during processing;
[0039] 2. Pre-process the steel bar load-bearing piece 1 in the steel bar processing plant, and use a small crane or other means, such as a hoist, electric or manual hoist, etc., to hoist and install it in place;
[0040] 3. Process the tie rod column 3 with channel steel or I-beam, and then weld and install it on the steel plate base; the processing can be pre-processed in the steel bar processing plant, or can be welded and processed on the abutment foundation 6 on-site.
[0041] 4. Weld or install the tie rod 4, and use the flange s...
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Abstract
The invention relates to a bridge back-pulling-resistant bearing construction support and a construction method. The bridge back-pulling-resistant bearing construction support comprises a bridge abutment foundation. Pulling rod uprights are buried into the bridge abutment foundation through a plurality of steel plate bases and bearing lug plates are embedded in the side walls of the bridge abutment foundation; a frame structural beam is composed of reinforced steel bar bearing pieces and inclined struts, one end of the frame structural beam is connected with the bearing lug plates, and the upper end face of the frame structural beam is connected with the pulling rod uprights through a plurality of pulling rods. The construction method comprises the following steps that when the bridge abutment foundation is constructed, the steel plate bases and the bearing lug plates are buried; the reinforced steel bar bearing pieces are installed in place; the pulling rod uprights are machined and then installed on the steel plate bases in a welding mode; the pulling rods are installed; the inclined studs are welded; a scaffold and a beam bottom mold are laid and reinforced steel rib installation, mold erection and concrete construction are conducted; beam body construction of a small-span bridge is achieved. According to the bridge back-pulling-resistant bearing construction support and the method, bearing of beam body concrete cast-in-place construction of the small-span bridge is achieved, according to the structure, materials are easily obtained, the adopted devices are simple, the construction period is short, and impact caused by flood can be avoided.
Description
technical field [0001] The invention relates to the construction field of cast-in-place girder bodies in bridge construction, in particular to a bridge anti-back pull load-bearing construction support and a construction method. Background technique [0002] At present, the main methods used in the construction of bridge beams with small spans (usually less than or equal to 32 meters) at home and abroad are: [0003] 1. Island-building cast-in-place method: use filling materials to fill in the area where the beam body is installed and tamp it layer by layer to form an island-like platform. Then the formwork base is poured, the steel bars are installed, the formwork is erected, the concrete is poured, the bridge deck is poured, and finally the platform is excavated. The advantage of this construction method is that the method is the simplest, but the disadvantage is that the required construction period is the longest, and sufficient equipment for earthwork excavation, loadin...
Claims
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Application Information
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