A precast concrete beam lap joint positioning and forming device for prefabricated buildings

Abstract

This utility model relates to a positioning and forming device for the lap joint groove of precast concrete beams in prefabricated buildings, belonging to the technical field of precast concrete beam construction. The purpose is to provide a positioning and forming device for the lap joint groove of precast concrete beams in prefabricated buildings that is less prone to grout leakage, has accurate positioning, and is easy to demold. The technical solution includes molds, fixed channel steels, connecting channel steels, and crossbeams. Two fixed channel steels are arranged back-to-back, and two molds are fixed to the bottom surfaces of the two fixed channel steels respectively. The size and shape of the two molds are adapted to the size and shape of the lap joint groove on the precast concrete beam. Two connecting channel steels are arranged back-to-back, located on both sides of the two fixed channel steels. Multiple bolt holes are provided at the bottom of the two connecting channel steels. Two crossbeams span over all the fixed channel steels and connecting channel steels and are fixed to the top surfaces of all the fixed channel steels and connecting channel steels. This utility model is used for positioning and forming the lap joint groove of precast concrete beams.

Description

Technical Field

[0001] This utility model relates to a positioning and forming device for the lap joint groove of precast concrete beams in prefabricated buildings, belonging to the field of construction technology for precast concrete beams in prefabricated buildings. Background Technology

[0002] The accuracy of the lap joint position and the construction quality of the lap joint groove of prefabricated concrete beams directly affect the stability and appearance quality of the prefabricated building beams.

[0003] Currently, most prefabricated building PC beam lap joint positioning and forming devices are single forming steel molds, and each slot is formed individually.

[0004] However, during the construction process, the above-mentioned molds often experience grout leakage at the lap joint of the PC beams. The demolding is difficult due to changes in the volume of concrete, and the lap joint of the PC beams is easily damaged during demolding. Furthermore, when there are lap joints on both sides of the PC beam, it is difficult to ensure that the positions of the lap joints on both sides are relatively accurate. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a prefabricated concrete beam lap joint positioning and forming device that is not prone to grout leakage, has accurate positioning, and is easy to demold.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a positioning and forming device for the lap joint groove of precast concrete beams in prefabricated buildings, comprising molds, fixed channel steels, connecting channel steels, and crossbeams. Two fixed channel steels are arranged back to back, and two molds are respectively fixed on the bottom surfaces of the two fixed channel steels. The size and shape of the two molds are adapted to the size and shape of the lap joint groove on the precast concrete beam. Two connecting channel steels are arranged back to back and are located on both sides of the two fixed channel steels. Multiple bolt holes are provided at the bottom of the two connecting channel steels. Two crossbeams span over all the fixed channel steels and connecting channel steels and are fixed together with the top surfaces of all the fixed channel steels and connecting channel steels.

[0007] Preferably, each of the two molds has a chisel plate covering its opposite side.

[0008] Preferably, a ring of double-sided tape is affixed to each of the two opposing sides of the mold.

[0009] Preferably, the bottom, front, and back of the mold are all covered with a layer of extruded polystyrene foam board.

[0010] Preferably, the roughening board, the extruded polystyrene foam board, and the mold are all bonded together.

[0011] Preferably, the bottom of the two fixed channel steels is higher than the bottom of the two connecting channel steels.

[0012] Preferably, both crossbeams are angle steel.

[0013] Compared with the prior art, the present invention has the following beneficial effects.

[0014] 1. This utility model adds a fixing part to the upper part of the precast concrete beam lap joint groove mold, connecting the molds of the precast concrete beam lap joint grooves on both sides in opposite positions into a whole, which can realize the synchronous installation and positioning of the molds on both sides, reduce installation deviation, and improve the accuracy of beam erection in prefabricated buildings.

[0015] 2. In this utility model, a fixing part is added to the upper part of the mold, which makes the connection with the side mold of the precast concrete beam more solid and improves the overall rigidity of the mold after installation. Combined with extruded polystyrene foam board and double-sided tape, the mold can better fit on the side mold of the precast concrete beam during the concrete pouring process, effectively preventing concrete slurry from intruding between the mold and the side mold, and ensuring the appearance quality of the lap joint of the precast concrete beam.

[0016] 3. This utility model has 5mm thick extruded polystyrene foam boards attached to the bottom, front and back of the two molds, which makes the three sides of the mold flexible and reduces the pressure on the mold caused by the volume change of the concrete after solidification, making demolding convenient and reducing damage to the concrete in the groove.

[0017] 4. This utility model has a chisel plate attached to the opposite surfaces of the two molds. After demolding, a chisel effect is naturally formed, which facilitates subsequent construction.

[0018] 5. This utility model optimizes the forming device for the lap joint groove of precast concrete beams, integrates parts into one, has a simple structure, and only requires connecting the bottom bolt holes of the connecting channel steel to the side formwork with bolts, which simplifies the formwork operation process, makes it convenient to use, improves construction efficiency, and saves labor costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram showing the connection between the fixed channel steel, the connecting channel steel, and the crossbeam in this utility model.

[0022] Figure 3 This is a schematic diagram of the mold structure in this utility model.

[0023] In the diagram: 1 is the mold, 2 is the fixed channel steel, 3 is the connecting channel steel, 4 is the crossbeam, 5 is the bolt hole, 6 is the roughened plate, 7 is the double-sided adhesive, 8 is the extruded polystyrene foam board, and 9 is the side mold. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model, provided that it does not affect the effects and purposes that this utility model can produce. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0026] The present invention provides the following embodiments.

[0027] like Figure 1 , Figure 2 As shown, this utility model discloses a positioning and forming device for the lap joint groove of precast concrete beams in prefabricated buildings, including a mold 1, fixed channel steel 2, connecting channel steel 3, and a crossbeam 4. Two fixed channel steels 2 are arranged back to back, and two molds 1 are respectively fixed on the bottom surface of the two fixed channel steels 2. The size, shape, and spacing of the two molds 1 are adapted to the size, shape, and spacing of the lap joint groove on the precast concrete beam. Two connecting channel steels 3 are arranged back to back and are located on both sides of the two fixed channel steels 2. Multiple bolt holes 5 are provided at the bottom of the two connecting channel steels 3. Two crossbeams 4 span over all the fixed channel steels 2 and connecting channel steels 3 and are fixed together with the top surface of all the fixed channel steels 2 and connecting channel steels 3.

[0028] The mold 1 can be made of metal and welded to the bottom surface of the fixed channel steel 2.

[0029] The bolt hole 5 can be an elongated hole, which facilitates fine-tuning of the position.

[0030] The crossbeam 4 can be connected to the fixed channel steel 2 and the connecting channel steel 3 by welding, bolting, or bonding.

[0031] like Figure 3 As shown, each of the two molds 1 has a chisel plate 6 covering its opposite side, and the chisel plate 6 is attached to the mold 1.

[0032] A ring of double-sided tape 7 is attached to each of the two opposing sides of the mold 1. The thickness of the double-sided tape 7 is 2mm.

[0033] The bottom, front, and back surfaces of the mold 1 are all covered with a layer of extruded polystyrene foam board 8. The extruded polystyrene foam board 8 is adhered to the mold 1, and its thickness is 5mm. The front and back buttons in this utility model... Figure 1 The diagram shown is the standard, meaning the two side forms are arranged approximately 9 units apart, with the side facing the construction workers being the front and the side facing away from them being the back.

[0034] The bottom of the two fixed channel steels 2 is higher than the bottom of the two connecting channel steels 3.

[0035] Both of the crossbeams 4 are made of angle steel.

[0036] The method of using this utility model is as follows.

[0037] In use, first clean the side molds 9 and molds 1 of the precast concrete beam to ensure that the surfaces are clean and free of contamination. Apply a release agent to the side molds 9. Then, attach 2mm thick double-sided tape 7 to the two opposite sides of the two molds 1, i.e., the sides closest to the side molds 9, along the four edges. Then, according to the beam design drawing, determine the position of the lap joint groove of the main and secondary beams, and insert this utility model between the two side molds 9 from top to bottom.

[0038] After the device is inserted between the two side molds 9, a suitable through hole on the top of the side mold 9 is selected and connected to the bolt hole 5 on the connecting channel steel 3 with a connecting bolt. Do not tighten the bolt immediately. Measure the position of the mold 1 again and adjust it to meet the requirements. Then tighten the bolt. Since the upper crossbeam 4 connects the two molds 1 into a whole, the installation of the two molds 1 is completed simultaneously after tightening the bolt, ensuring accurate and reliable relative positioning. Finally, install the tie bolts on the top of the side mold 9. At this point, under the combined action of the upper crossbeam 4, the bolts, the tie bolts on the top of the side mold 9, and the double-sided adhesive 7, the two molds 1 can fit tightly against the side mold 9, achieving the required installation effect.

[0039] After the precast concrete beam is poured, loosen the tie bolts at the top of the side formwork 9, then loosen the bolts connecting the side formwork 9 and the connecting channel steel 3. Gently tap the side formwork 9 to separate it from the concrete beam. At this time, due to the elasticity of the extruded polystyrene foam board 8 on the mold 1, the pressure exerted on the mold 1 by the concrete is greatly reduced. Vertically lift the upper crossbeam 4, and the molds 1 on both sides can be easily removed simultaneously, achieving the purpose of positioning and forming the lap joint groove of the precast concrete beam. Since the opposite sides of the two molds 1, i.e. the side facing the poured concrete, are covered with a roughening board 6, after removing this utility model, the lap joint groove of the main and secondary concrete beams will naturally form a roughening effect, facilitating subsequent construction.

[0040] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A precast concrete beam lap joint positioning and forming device for prefabricated buildings, characterized in that: The system includes a mold (1), a fixed channel steel (2), a connecting channel steel (3), and a crossbeam (4). The two fixed channel steels (2) are set back to back. The two molds (1) are fixed on the bottom surface of the two fixed channel steels (2), and the size, shape, and spacing of the two molds (1) are adapted to the size, shape, and spacing of the lap joint on the precast concrete beam. The two connecting channel steels (3) are set back to back and are located on both sides of the two fixed channel steels (2). The bottom of the two connecting channel steels (3) is provided with multiple bolt holes (5). The two crossbeams (4) span over all the fixed channel steels (2) and connecting channel steels (3) and are fixed together with the top surface of all the fixed channel steels (2) and connecting channel steels (3).

2. The prefabricated building precast concrete beam lap joint positioning and forming device according to claim 1, characterized in that: Each of the two molds (1) has a chisel plate (6) covering its opposite side.

3. The prefabricated building precast concrete beam lap joint positioning and forming device according to claim 2, characterized in that: Each of the two molds (1) has a ring of double-sided tape (7) pasted on its opposite sides.

4. The prefabricated building precast concrete beam lap joint positioning and forming device according to claim 3, characterized in that: The bottom, front and back of the mold (1) are covered with a layer of extruded polystyrene foam board (8).

5. The precast concrete beam lap joint positioning and forming device for prefabricated buildings according to claim 4, characterized in that: The roughening board (6), the extruded polystyrene foam board (8), and the mold (1) are all glued together.

6. The prefabricated building precast concrete beam lap joint positioning and forming device according to claim 1, characterized in that: The bottom of the two fixed channel steels (2) is higher than the bottom of the two connecting channel steels (3).

7. The positioning and forming device for the lap joint of the prefabricated concrete beam of the fabricated building according to claim 1, characterized in that: Both beams (4) are angle steel.

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