Adjustable formwork combination device for mounting bridge prefabricated box girder reinforcing steel bars

Abstract

An adjustable formwork combination device for installing bridge prefabricated box girder reinforcing steel bars comprises a web reinforcing steel bar formwork, a bottom plate reinforcing steel bar formwork and two top beams and is characterized in that the web reinforcing steel bar formwork and the bottom plate reinforcing steel bar formwork respectively comprise a plurality of adjustable positioning frames, and the two top beams are connected to the tops of the triangular positioning frames. The adjustable formwork combination device comprises a plurality of triangular positioning frames, a plurality of top beams and four bottom beams, the top beams are parallel and symmetrical to each other, the bottom beams are connected to the bottoms of the triangular positioning frames, and the two bottom beams on one side are connected through back-attached bolts. The formwork is movable and can be moved and adjusted, so that the construction efficiency is greatly improved, the construction cost is reduced, the number of operators is increased, and the steel bar construction is carried out cooperatively, so that the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar installation in bridge engineering. Specifically, it is an adjustable formwork combination device for steel bar installation of precast box girders of bridges. Background Technique

[0002] In the field of bridge engineering, precast box girders are a common structural form, which are mainly cast from reinforced concrete. During the construction process of precast box girders, the installation accuracy of steel bars directly affects the structural strength and durability of the box girders. Therefore, how to accurately and quickly install the steel bars of precast box girders has been a problem studied in the field of bridge engineering. At the same time, the application of moving formwork equipment in bridge engineering can greatly improve the construction efficiency and reduce the construction period.

[0003] The problems existing in precast box girders are mainly as follows: First, most of the existing falsework are fixed and cannot be moved and adjusted according to actual needs, which to a certain extent limits their scope of use and flexibility. Second, a large amount of time and manpower are required in the production and installation of the existing falsework, increasing the construction cost and affecting the construction progress. The existing formwork cannot be reused after use, resulting in waste of resources.

[0004] Therefore, there are various inconveniences and problems in the known methods of manufacturing precast box girders. Content of the Utility Model

[0005] The purpose of the utility model is to provide a safe and reliable adjustable formwork combination device for steel bar installation of precast box girders of bridges.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] An adjustable formwork combination device for steel bar installation of precast box girders of bridges, comprising a web steel bar formwork, a bottom plate steel bar formwork, and two top beams, characterized in that:

[0008] The web steel bar formwork and the bottom plate steel bar formwork each include a plurality of adjustable positioning frames. The plurality of positioning frames are distributed at a preset spacing on the same straight line. Each positioning frame includes a top cross beam, a bottom cross beam, a bottom plate steel bar positioning steel plate, a bottom fixing square steel, and triangular positioning frames symmetrically arranged at both ends of the cross beam;

[0009] The two top beams are connected to the tops of the plurality of triangular positioning frames. The top beams are parallel and symmetrical to each other. The top beams are perpendicularly fixed to the inner supports. The inner supports are welded with short steel bars according to the web steel bar spacing to form a middle notch as a horizontal steel bar placement table. The outer supports can be inserted into the fixed round steel behind the top beams and can be adjusted movably to suit the structural size. The top beams are grooved according to the web vertical steel bar spacing;

[0010] The four bottom beams are connected to the bottoms of the multiple triangular positioning frames. Two bottom beams on one side are bolted to each other with their backs facing each other, and the outer angle irons are spot-welded and fixed to the bottoms of the inner supports of the web steel bar formwork; the inner steel bars are fully welded and fixed to the bottom fixed square steel. The bottom beams are grooved according to the spacing of the vertical web steel bars; the bottom fixed square steel is grooved in advance, and the steel bar slotting steel plates at the bottom are inserted according to the structural requirements. The two bottom beams on both sides are symmetrical to each other:

[0011] Wherein: the web steel bar formwork and the bottom plate steel bar formwork are bolted together to form an integral precast box girder steel bar installation formwork.

[0012] The adjustable formwork combination device for the steel bar installation of the precast box girder of the utility model can also be further realized by adopting the following technical measures.

[0013] For the aforementioned adjustable formwork combination device for the steel bar installation of the precast box girder of the bridge, a plurality of sockets are arranged at intervals on the bottom fixed square steel.

[0014] After adopting the above technical solution, the adjustable formwork combination device for the steel bar installation of the precast box girder of the utility model has the following advantages:

[0015] 1. The grooving and positioning method accurately positions the installation position of the steel bars of the precast box girder, greatly improving the installation accuracy of the steel bars;

[0016] 2. The formwork is mobile and can be moved and adjusted, greatly improving the construction efficiency and reducing the construction cost;

[0017] 3. Increasing the cooperation of the operators to carry out the steel bar construction improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the basic structure of an embodiment of the utility model;

[0019] Figure 2 It is an enlarged view of the components of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the formwork combination device of an embodiment of the utility model.

[0021] In the figure: 1 top angle iron, 2 round pipe, 3 outer support, 4 steel bar placement table, 5 temporary fixing angle iron, 6 bolt, 7 bottom fixing angle iron, 8 bottom plate steel bar fixing slot, 9 base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the utility model in conjunction with the embodiments and their accompanying drawings. Embodiment

[0023] Now please refer to Figures 1 - 3, the adjustable formwork combination device for steel bar installation of precast box girders of bridges in the present utility model includes a web steel bar formwork, a bottom plate steel bar formwork, and two top beams.

[0024] On the top angle iron 1 of the web steel bar formwork assembly, grooves are cut according to the design requirements. The depth of the grooves is 20 mm and the width is 20 mm to facilitate the precise positioning of steel bars; the round tubes 2 are multiple sections of steel round tubes with a diameter of 50 mm welded on the back of the angle iron according to the support needs, and the welding length is 100 mm to provide sufficient stability; the outer support 3 is an L-shaped strut. The short rod of the L-shaped strut can be movably inserted into the round tube 2, and one end of the long rod of the L-shaped strut supports on the ground. It can be flexibly adjusted according to the structural design requirements, is applicable to various medium and small precast box girders, and is temporarily fixed on the ground after adjusting the position; the inner side of the steel bar placement table 4. The horizontal steel bar placement table is composed of short steel bars with a length of 5 cm welded evenly by inner support steel bars according to the design level. The top is welded and fixed to the top angle iron, and after being adjusted together with the outer support 3, it is spot-welded and temporarily fixed to the bottom temporary fixing angle iron 6.

[0025] The bottom plate steel bar formwork includes components such as a bottom fixing angle iron 7, a bottom plate steel bar fixing card slot 8, and a square steel base 9. The materials of these components are all high-strength steel to ensure their stability and durability; the bottom fixing angle iron 7. The bottom fixing angle iron is grooved according to the designed steel bar spacing. The depth of the groove opening is 20 mm and the width is 20 mm; the bottom plate steel bar fixing card slot 8 is grooved according to the designed steel bar spacing. The depth of the groove opening is 30 mm and the width is 30 mm; the square steel base 9 is cut according to the needs of bottom plate steel bar fixing. The bottom plate steel bar slotting steel plate is fully welded to the right-angle contact surface between the upper part of the square steel and the bottom fixing angle iron 7, and steel bars are driven into the four surrounding bottoms for anchoring. After use, the anchoring steel bars are cut for recycling and reused. The web steel bar formwork and the bottom plate steel bar formwork are combined into an overall precast box girder steel bar installation formwork through bolt 6 connection. The diameter of the bolt is 10 mm and the length is 50 mm. The adjustable formwork combination made by the present invention can be flexibly turned around and used, which not only speeds up the construction progress but also ensures the construction quality.

[0026] The present utility model has substantial features and remarkable technical progress. The adjustable formwork combination device for steel bar installation of precast box girders of bridges in the present utility model adopts the method of grooving and positioning, which can accurately position the installation position of precast box girder steel bars, greatly improving the installation accuracy of steel bars, thereby improving the overall quality and performance of the box girder. The formwork equipment of the present invention is movable and can be moved and adjusted according to actual needs, greatly improving the construction efficiency and reducing the construction cost. This cannot be achieved by the existing fixed formwork. The formwork equipment can increase the cooperation of operators to carry out steel bar construction to improve the construction efficiency, and can ensure the construction quality, realizing the unity of high efficiency and high quality, which cannot be achieved by the existing large-scale mechanical equipment. The formwork equipment can adapt to complex and crowded environments and has strong applicability.

[0027] The adjustable formwork combination device for the installation of steel bars of precast box girders of the utility model can accurately position the installation position of the steel bars of the precast box girders, improve the construction accuracy, and at the same time can also realize the reuse of the formwork, reduce the construction cost and improve the construction progress.

[0028] The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the relevant technical fields can also make various transformations or changes without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the scope of the utility model and should be defined by each claim.

Claims

1. An adjustable formwork assembly device for installing reinforcement bars of a prefabricated box girder of a bridge, comprising a web reinforcement formwork, a bottom reinforcement formwork, and two top beams, characterized in that: The web reinforcement formwork and the bottom plate reinforcement formwork each include a plurality of adjustable positioning frames, the plurality of positioning frames are distributed in the same straight line according to a preset spacing, and each positioning frame includes a top crossbeam, a bottom crossbeam, a bottom plate reinforcement positioning steel plate, a bottom fixed square steel, and triangular positioning frames symmetrically arranged at both ends of the crossbeam; The two top beams are connected to the tops of the multiple triangular positioning frames, the top beams are parallel and symmetrical to each other, the top beams and the inner supports are fixed vertically to each other, the inner supports are welded with short steel bars according to the web steel bar spacing to make the middle notch as a horizontal steel bar placement table, the outer supports are inserted into the fixed round steel behind the top beams and can be movably adjusted to the applicable structural size, and the top beams are slotted according to the web vertical steel bar spacing; Four bottom beams, the bottom beams are connected to the bottom of the multiple triangular positioning frames, the two bottom beams on one side are connected to each other with back-to-back bolts, the angle irons facing outwards are spot-welded to the bottom of the inner support of the web reinforcement formwork; the reinforcements facing inwards are fully welded to the bottom fixed square steel, the bottom beams are slotted according to the spacing of the vertical reinforcements on the web; the bottom fixed square steel is slotted in advance, and the bottom reinforcement slot steel plate is inserted according to the structural requirements, and the bottom beams on both sides are symmetrical to each other: Wherein: the web steel bar formwork and the bottom plate steel bar formwork are connected by bolts to form an integral prefabricated box girder steel bar installation formwork.

2. The adjustable formwork assembly device for installing reinforcement bars of a prefabricated box girder of a bridge as claimed in claim 1, characterized in that: The bottom fixed square steel is provided with a plurality of sockets at intervals.

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