Steel-concrete combined bridge deck prefabricated slab hoisting device without damage to structure

Abstract

The utility model discloses a steel-concrete combined bridge deck precast slab hoisting device without damage to a structure, which comprises a connecting sleeve and a main anchor bar component which are prefabricated in a bridge deck slab, the connecting sleeve and the main anchor bar component are used for dismounting and fixing a movable lifting lug component through a connecting anchor bolt, and a round hoisting hole for hoisting is formed in the lifting lug component. A reinforcing assembly for structural reinforcement is further arranged in the lifting lug assembly. According to the utility model, the problems that the concrete at the root part of the lifting lug is broken during the lifting period and the concrete protection layer cannot be recovered after the lifting lug is cut after the lifting is completed due to the temporary lifting point made of the traditional HPB300 round steel are solved; the movable lifting lug and the anchor bolt can be repeatedly used, and are economical and environment-friendly; the anchor bar assembly is machined in a factory mode, positioning is accurate, and construction is convenient. The device disclosed by the utility model has a relatively wide application prospect in hoisting construction of engineering structure concrete members such as precast slabs, precast beams, precast columns, precast piles and the like.

Description

Technical Field

[0001] This utility model belongs to the field of bridge spanning systems, specifically relating to a steel-concrete composite bridge deck precast slab hoisting device that does not damage the structure. Background Technology

[0002] Steel-concrete composite bridge decks for long spans offer excellent load-bearing performance and economic efficiency. The bridge deck concrete slabs are prefabricated in the factory and then cast in place with wet joints after hoisting to the bridge site. During factory manufacturing, each prefabricated bridge deck slab typically requires four lifting rings to facilitate its transfer from the curing platform to the storage platform and later hoisting to the steel structural longitudinal and transverse beams at the bridge site.

[0003] Traditional lifting rings and embedded reinforcement bars are made of HPB300 round steel, bent into a single piece and embedded into the reinforcing cage during the binding of precast slab reinforcement. Round steel lifting rings are relatively flexible and often undergo local deformation during crane lifting, which can cause localized cracking of the concrete at the base of the lifting ring.

[0004] Furthermore, after the precast slabs are installed, a cutting machine is needed to remove the portion of the lifting rings protruding from the surface of the slabs. The cut surface is flush with the surface of the precast slab. The exposed round steel sections after cutting have no protective layer, making them prone to corrosion if the paving layer is damaged during operation, thus affecting the durability of the precast slabs. Moreover, the cut round steel cannot be reused and must be treated as scrap, which is relatively wasteful.

[0005] With the high-quality development of railway construction, this traditional hoisting device can no longer meet the current quality requirements. Utility Model Content

[0006] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a steel-concrete composite bridge deck precast slab hoisting device that does not damage the structure.

[0007] The technical solution of this utility model is: a steel-concrete composite bridge deck precast slab hoisting device that does not damage the structure, including a connecting sleeve and a main anchor bar assembly precast in the bridge deck. The connecting sleeve and the main anchor bar assembly are used to assemble and disassemble the movable lifting lug assembly through connecting anchor bolts. The lifting lug assembly forms a circular lifting hole for hoisting. The lifting lug assembly is also provided with a reinforcing component for structural reinforcement.

[0008] Furthermore, the lifting lug assembly includes a lifting lug connecting plate, in which a through hole is formed to align with the fixing assembly, thereby facilitating the connection of the anchor bolt through which it passes.

[0009] Furthermore, the lifting lug connecting plate is provided with a lifting lug pull plate, and the lifting lug pull plate has a circular lifting hole in the middle.

[0010] Furthermore, the lifting lug connecting plate and the lifting lug pull plate are perpendicular to each other.

[0011] Furthermore, the reinforcing component includes a tension reinforcing plate, which is fixed between the upper end of the lifting lug connecting plate and the outer side of the lifting lug pull plate.

[0012] Furthermore, the reinforcing component includes a lifting hole reinforcing plate, which is disposed on both sides of the lifting lug plate.

[0013] Furthermore, the connecting sleeve and main anchor bar assembly includes a connecting sleeve, the threaded end of which is not higher than the bridge deck.

[0014] Furthermore, a protective rubber gasket is provided between the connecting sleeve and the lifting lug connecting plate.

[0015] Furthermore, the lower end of the connecting sleeve is connected to the main anchor bar, which is J-shaped.

[0016] Furthermore, secondary anchor bars are provided between adjacent main anchor bars to connect them.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model separates the lifting lug assembly from the precast slab's embedded connecting sleeve and anchor bar assembly. Before pouring the precast slab, the connecting sleeve and anchor bar assembly are directly embedded in the reinforcing cage, and a natural rubber gasket is pasted on the top of the connecting sleeve. The gasket thickness meets the requirements of the precast slab's reinforcing bar protective layer. When pouring concrete, transparent tape is used to cover the gasket hole to prevent mortar from clogging the connecting sleeve.

[0019] This utility model's movable lifting lug assembly is welded from steel plates, with connecting bolt holes on the connecting plate. The spacing of these bolt holes matches that of the connecting sleeve assembly. When moving and hoisting precast slabs, anchor bolts are used to connect the movable lifting lug assembly and the pre-embedded connecting sleeve, and a special hoisting frame is used for hoisting. After hoisting, the connecting anchor bolts and rubber washers are removed, and the holes in the connecting sleeve are sealed and smoothed using high-strength epoxy mortar.

[0020] This invention avoids the problems caused by the concrete cracking at the base of the lifting lug during hoisting and the inability to restore the concrete protective layer after cutting the lifting lug after hoisting, which are caused by the temporary lifting points made of traditional HPB300 round steel. Furthermore, the movable lifting lug and anchor bolts can be reused, which is economical and environmentally friendly. The anchor bar components are manufactured in the factory, which ensures precise positioning and convenient construction.

[0021] This utility model device has broad application prospects in the hoisting and construction of precast concrete structural components such as precast slabs, precast beams, precast columns, and precast piles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the elevation structure of a single hoisting device in this utility model;

[0023] Figure 2 This is a plan view of a single hoisting device movable lug assembly in this utility model;

[0024] Figure 3 This is a plan view of the connecting sleeve and anchor bar assembly of a single hoisting device in this utility model;

[0025] Figure 4 This is a plan view of four sets of the device of this utility model arranged on a whole bridge deck precast slab;

[0026] in:

[0027] 1. Movable lifting lug assembly; 2. Connecting anchor bolt.

[0028] 3 Protective rubber gasket; 4 Connecting sleeve and main anchor bar assembly.

[0029] 5. Laterally distributed anchor bars

[0030] 1-1 Lifting lug plate 1-2 Lifting lug connecting plate

[0031] 1-3 Tension-strength reinforcing plate; 1-4 Lifting hole reinforcing plate

[0032] 1-5 Circular lifting hole; 1-6 Anchor bolt connection hole

[0033] 4-1 Connecting sleeve 4-2 Main anchor bar

[0034] 4-3 Secondary anchor bars. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0036] like Figures 1 to 4 As shown, a non-destructive steel-concrete composite bridge deck precast slab hoisting device includes a connecting sleeve and a main anchor bar assembly 4 precast in the bridge deck. The connecting sleeve and the main anchor bar assembly 4 are used to assemble and disassemble the movable lifting lug assembly 1 through connecting anchor bolts 2. The lifting lug assembly 1 forms circular lifting holes 1-5 for hoisting. The lifting lug assembly 1 is also provided with a reinforcing component for structural reinforcement.

[0037] The lifting lug assembly 1 includes a lifting lug connecting plate 1-2, in which a through hole is formed to align with the fixing assembly, thereby facilitating the passage of the connecting anchor bolt 2.

[0038] The lifting lug connecting plate 1-2 is provided with a lifting lug pull plate 1-1, and the lifting lug pull plate 1-1 has a circular lifting hole 1-5 in the center.

[0039] The lifting lug connecting plate 1-2 and the lifting lug pull plate 1-1 are perpendicular to each other.

[0040] The reinforcing component includes a tension reinforcing plate 1-3, which is fixed between the upper end of the lifting lug connecting plate 1-2 and the outer side of the lifting lug pull plate 1-1.

[0041] The reinforcing component includes lifting hole reinforcing plates 1-4, which are disposed on both sides of the lifting lug plate 1-1.

[0042] The connecting sleeve and main anchor bar assembly 4 includes a connecting sleeve 4-1, the threaded end of which is not higher than the bridge deck.

[0043] A protective rubber gasket 3 is also provided between the connecting sleeve 4-1 and the lifting lug connecting plate 1-2.

[0044] The lower end of the connecting sleeve 4-1 is connected to the main anchor bar 4-2, and the main anchor bar 4-2 is J-shaped.

[0045] A secondary anchor bar 4-3 is provided between adjacent main anchor bars 4-2 to connect the two.

[0046] Specifically, the secondary anchor bar 4-3 is U-shaped, with two adjacent main anchor bars 4-2 arranged in opposite directions, and the U-shaped secondary anchor bar 4-3 is placed between the two, thereby connecting them.

[0047] Specifically, the transverse sections of the main anchor bar 4-2 and the secondary anchor bar 4-3 are connected to the transversely distributed anchor bars 5 in the bridge deck.

[0048] Specifically, the movable lifting lug assembly 1 is a combined component welded from steel plates, including a lifting lug pull plate 1-1, a lifting lug connecting plate 1-2, a tension reinforcing plate 1-3, a lifting hole reinforcing plate 1-4, a lifting hole 1-5, and an anchor bolt connecting hole 1-6.

[0049] Corresponding to the structure, the movable lifting lug assembly 1 can be removed and reused after the bridge deck precast slab is hoisted.

[0050] It should be noted that the effective length of the connecting anchor bolt 2 screwed into the connecting sleeve 4-1 should not be less than 1.5 times the anchor bolt diameter.

[0051] Specifically, the connecting sleeve and main anchor bar assembly 4 is a welded assembly, including connecting sleeve 4-1, main anchor bar 4-2, and secondary anchor bar 4-3.

[0052] More specifically, the transversely distributed anchor bars 5 are all cross-welded to the main anchor bars 4-2 and the secondary anchor bars 4-3.

[0053] Specifically, the thickness of the protective layer rubber gasket 3 is consistent with the thickness of the reinforcing steel protective layer of the bridge deck precast slab, the diameter of the central circular hole is consistent with the diameter of the connecting anchor 2, and it is bonded to the top surface of the connecting sleeve 4-1 before the bridge deck precast slab is poured.

[0054] Specifically, the protective layer rubber gasket 3 should be removed after the bridge deck precast slab is hoisted, and the holes of gasket 3 and connecting sleeve 4-1 should be sealed and smoothed with high-strength epoxy mortar.

[0055] This utility model separates the lifting lug assembly from the precast slab's embedded connecting sleeve and anchor bar assembly. Before pouring the precast slab, the connecting sleeve and anchor bar assembly are directly embedded in the reinforcing cage, and a natural rubber gasket is pasted on the top of the connecting sleeve. The gasket thickness meets the requirements of the precast slab's reinforcing bar protective layer. When pouring concrete, transparent tape is used to cover the gasket hole to prevent mortar from clogging the connecting sleeve.

[0056] This utility model's movable lifting lug assembly is welded from steel plates, with connecting bolt holes on the connecting plate. The spacing of these bolt holes matches that of the connecting sleeve assembly. When moving and hoisting precast slabs, anchor bolts are used to connect the movable lifting lug assembly and the pre-embedded connecting sleeve, and a special hoisting frame is used for hoisting. After hoisting, the connecting anchor bolts and rubber washers are removed, and the holes in the connecting sleeve are sealed and smoothed using high-strength epoxy mortar.

[0057] This invention avoids the problems caused by the concrete cracking at the base of the lifting lug during hoisting and the inability to restore the concrete protective layer after cutting the lifting lug after hoisting, which are caused by the temporary lifting points made of traditional HPB300 round steel. Furthermore, the movable lifting lug and anchor bolts can be reused, which is economical and environmentally friendly. The anchor bar components are manufactured in the factory, which ensures precise positioning and convenient construction.

[0058] This utility model device has broad application prospects in the hoisting and construction of concrete components for engineering structures such as precast slabs, precast beams, precast columns, and precast piles.

Claims

1. A non-destructive hoisting device for precast steel-concrete composite bridge deck slabs, characterized in that: The bridge deck includes a connecting sleeve and a main anchor bar assembly (4) prefabricated in the bridge deck. The connecting sleeve and the main anchor bar assembly (4) are used to assemble and disassemble the movable lifting lug assembly (1) through the connecting anchor bolts (2). The lifting lug assembly (1) forms a circular lifting hole (1-5) for lifting. The lifting lug assembly (1) is also provided with a reinforcing component for structural reinforcement.

2. The precast steel-concrete composite bridge deck hoisting device that causes no structural damage as described in claim 1, characterized in that: The lug assembly (1) includes a lug connecting plate (1-2), in which a through hole is formed to align with the fixing assembly, thereby facilitating the connection of the anchor bolt (2) through which it passes.

3. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 2, characterized in that: The lifting lug connecting plate (1-2) is provided with a lifting lug pull plate (1-1), and a circular lifting hole (1-5) is opened in the lifting lug pull plate (1-1).

4. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 3, characterized in that: The lifting lug connecting plate (1-2) and the lifting lug pull plate (1-1) are perpendicular to each other.

5. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 3, characterized in that: The reinforcing component includes a tension reinforcing plate (1-3), which is fixed between the upper end of the lifting lug connecting plate (1-2) and the outer side of the lifting lug pull plate (1-1).

6. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 3, characterized in that: The reinforcing component includes a lifting hole reinforcing plate (1-4), which is disposed on both sides of the lifting lug plate (1-1).

7. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 1, characterized in that: The connecting sleeve and main anchor bar assembly (4) includes a connecting sleeve (4-1), the threaded end of which is not higher than the bridge deck.

8. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 7, characterized in that: A protective rubber gasket (3) is also provided between the connecting sleeve (4-1) and the lifting lug connecting plate (1-2).

9. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 7, characterized in that: The lower end of the connecting sleeve (4-1) is connected to the main anchor bar (4-2), and the main anchor bar (4-2) is J-shaped.

10. The precast steel-concrete composite bridge deck hoisting device that does not damage the structure according to claim 9, characterized in that: A secondary anchor bar (4-3) is provided between adjacent main anchor bars (4-2) to connect the two.

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