A reinforced pre-embedded hoisting plate device for hoisting a box girder

Abstract

The utility model relates to box girder construction technical field especially a kind of reinforcing embedded hoist plate device for hoisting box girder, including main body steel sheet, hoisting hole is set in the top of main body steel sheet, horizontal bearing steel sheet is welded in the bottom of main body steel sheet, main body steel sheet and the horizontal bearing steel sheet between are strengthened connection by welding angle steel, reinforcing steel bar is welded in the side of main body steel sheet;Main body steel sheet is embedded in the inside of prefabricated box girder, and the hoisting hole in its top is located above beam top plane.The utility model has the advantages that: simple and reasonable structure can realize the safe lifting of prefabricated box girder;By cutting replace dismounting, hoist plate device retained in the inside of prefabricated box girder can play certain reinforcing effect to the structure of prefabricated box girder, improve the structural performance of prefabricated box girder;Construction is convenient, and it is suitable for promotion.

Description

Technical Field

[0001] This utility model relates to the field of box girder construction technology, and in particular to a reinforced pre-embedded lifting plate device for hoisting box girders. Background Technology

[0002] With the rapid development of precast concrete components, precast box girders are gradually being used in bridge construction, offering advantages such as high construction efficiency and easily guaranteed construction accuracy. Generally, after precast box girders are prefabricated in the factory, they are transported to the site and hoisted onto bridge piers using lifting equipment. Therefore, during the prefabrication process of precast box girders, it is necessary to embed lifting point devices inside them for connecting and lifting equipment.

[0003] Currently, the most common type of lifting device is the through-type lifting rod device. This involves creating a vertical through-hole in the precast box girder at the designed lifting point location, installing anchor rods within the through-hole to lift the box girder, and then removing the lifting rod and sealing the through-hole after lifting. However, when there is insufficient construction space under the bottom of the precast box girder, workers cannot access the bottom to dismantle the lifting rod, rendering the lifting rod device inadequate for lifting precast box girders when construction space is limited. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of the prior art by providing a reinforced pre-embedded lifting plate device for hoisting box girders. By pre-embedding the lifting plate device inside the precast box girder, except for a portion of the device that extends above the top plane of the precast box girder, the rest of the device is embedded inside the precast box girder, thus solving the problem of hoisting precast box girders when there is insufficient construction space below the bottom of the precast box girder.

[0005] The objective of this utility model is achieved through the following technical solution: A reinforced embedded lifting plate device for hoisting box girders, characterized in that: it includes a main steel plate, the top of which has a lifting hole, and a horizontal bearing steel plate welded to the bottom of which is reinforced by welding angle steel; the main steel plate and the horizontal bearing steel plate are reinforced by welding angle steel, and reinforcing bars are welded to the side of which is the main steel plate; the main steel plate is embedded inside the precast box girder, and the lifting hole at its top is located above the top plane of the girder.

[0006] Reinforcing steel plates are symmetrically arranged on both sides of the hoisting hole, and the reinforcing steel plates are welded to the main steel plate to form an integral structure.

[0007] Along the vertical direction of the main steel plate, a number of reinforcing bars are evenly spaced on both sides of the main steel plate, and the reinforcing bars on both sides are symmetrical.

[0008] The reinforcing steel bar is of a U-shaped structure.

[0009] The extension length of the horizontal bearing steel plate is greater than that of the reinforcing steel bar.

[0010] The advantages of the utility model are as follows: the structure is simple and reasonable, and the safe lifting of the precast box girder can be realized; by cutting instead of disassembling, the hanging plate device remaining inside the precast box girder can play a certain strengthening role in the structure of the precast box girder, improving the structural performance of the precast box girder; the construction is convenient and suitable for popularization. Description of the Drawings

[0011] Figure 1 It is an elevation view of the installation structure of the utility model; Figure 2 It is a sectional view of the installation structure of the utility model; Figure 3 It is a schematic structural view of the utility model; Figure 4 is Figure 3 a side view of Detailed Embodiment

[0012] The features of the utility model and other related features are further described in detail below through embodiments with reference to the drawings for the understanding of those skilled in the same industry: As Figure 1-4 shown, 1-8 in the figure respectively represent: precast box girder 1, hanging plate device 2, main steel plate 3, lifting hole 4, reinforcing steel plate 5, horizontal bearing steel plate 6, angle steel 7, reinforcing steel bar 8.

[0013] Embodiment: As Figures 1 to 4 shown, in this embodiment, the reinforced embedded hanging plate device for hoisting vectors is used for the hoisting of the precast box girder 1. The precast box girder 1 is embedded with the hanging plate device 2 of this embodiment at the designed lifting point position during the precast process, and the hanging plate device 2 provides a lifting point for connecting with the hoisting equipment.

[0014] Specifically, with reference to Figure 3 and Figure 4 shown, the hanging plate device 2 includes a vertical main steel plate 3, and a lifting hole 4 for connecting with the hoisting equipment is opened at the top position of the main steel plate 3. Reinforcing steel plates 5 are respectively welded on the surfaces of the main steel plate 3 on both sides of the lifting hole 4, and through holes adapted to the lifting hole 4 are opened on the reinforcing steel plates 5. The setting of the reinforcing steel plates 5 ensures that the local structural stress performance of the main steel plate 3 meets the hoisting requirements, and avoids safety accidents caused by the failure of the steel plate due to the weakness of the local structure.

[0015] With reference to Figures 1 to 4As shown, the overall length of the main steel plate 3 meets the requirements for hoisting force, and its upper part extends out of the top plane of the precast box girder 1 so that the hoisting hole 4 extends out of the precast box girder 1. The rest of the main steel plate 3 is embedded in the beam body of the precast box girder 1 and does not extend out of the bottom of the precast box girder 1.

[0016] A horizontal bearing steel plate 6 is welded to the bottom of the main steel plate 3. The horizontal bearing steel plate 6 extends horizontally from the main steel plate 3 to both sides to improve the connection performance between the main steel plate 3 and the precast box girder 1. In particular, when the main steel plate 3 is subjected to the lifting force of the hoisting equipment, the horizontal bearing steel plate 6 can fully transfer the force to the precast box girder 1, ensuring safe hoisting and preventing damage to the hoisting device 2.

[0017] In this embodiment, as Figure 4 As shown, in order to improve the connection performance between the main steel plate 3 and the horizontal bearing steel plate 6, angle steel 7 is welded to both sides of the main steel plate 3 at positions corresponding to the horizontal bearing steel plate 6. The angle steel 7 is an L-shaped angle steel, with one side welded and fixed to the main steel plate 3, and the other side welded to the horizontal bearing steel plate 6.

[0018] Combination Figure 3 and Figure 4 As shown, several reinforcing bars 8 are welded to both sides of the main steel plate 3, arranged evenly in the vertical direction. These reinforcing bars 8 adopt a U-shaped structure, and their two ends are welded and fixed to the main steel plate 3. By welding several reinforcing bars 8 onto the main steel plate 3, the bonding performance between the main steel plate 3 and the concrete of the precast box girder 1 is improved, further ensuring the structural performance of the hanging plate device 2.

[0019] In this embodiment, the lifting plate device 2 is embedded during the prefabrication of the precast box girder 1 according to the designed lifting point positions. After hoisting, the portion of the lifting plate device 2 extending beyond the top plane of the beam is cut off to ensure the integrity of the top plane of the precast box girder 1. The remaining portion of the lifting plate device 2 remains inside the precast box girder 1, where the horizontal load-bearing steel plate 6 and reinforcing steel bars 8 serve as internal reinforcement, improving the structural performance of the precast box girder 1. In some cases, the internal reinforcing steel bars of the precast box girder 1 are connected with the reinforcing steel bars 8 to form an integral structure, further improving performance.

[0020] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A reinforced embedded lifting plate device for hoisting box girders, characterized in that: It includes a main body steel plate. A hoisting hole is opened at the top of the main body steel plate. A horizontal bearing steel plate is welded to the bottom of the main body steel plate. The main body steel plate and the horizontal bearing steel plate are strengthened and connected by welding angle steels. Reinforcing bars are welded to the side surface of the main body steel plate; the main body steel plate is buried inside the precast box girder, and the hoisting hole at its top is located above the beam top plane.

2. The reinforced embedded lifting plate device for hoisting box girders according to claim 1, characterized in that: Reinforcing steel plates are symmetrically arranged on both sides of the hoisting hole respectively. The reinforcing steel plates and the main body steel plate are fixed by welding to form an integral structure.

3. A reinforced embedded lifting plate device for hoisting box girders according to claim 1, characterized in that: Along the vertical direction of the main body steel plate, a number of the reinforcing bars are evenly spaced and arranged on both side surfaces of the main body steel plate respectively, and the reinforcing bars on both sides are symmetric.

4. A reinforced embedded lifting plate device for hoisting box girders according to claim 1 or 3, characterized in that: The reinforcing bar is of a U-shaped structure.

5. A reinforced embedded lifting plate device for hoisting box girders according to claim 1, characterized in that: The extending length of the horizontal bearing steel plate is greater than the extending length of the reinforcing bar.

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