Steel box girder cast-in-situ bridge deck slab construction support device

Abstract

The present application relates to the field of steel box girder, in particular to a kind of steel box girder cast-in-place bridge deck construction support device, including multiple steel box girder wing plate, support unit is equipped between adjacent steel box girder wing plate;Support unit includes support assembly and hoisting assembly;The steel box girder cast-in-place bridge deck construction support device, the steel box girder cast-in-place formwork support construction technology is optimized, the difficult problem that the traditional formwork support system is limited to the bad geological condition, cannot handle foundation or handle difficulty is solved, while simplifying process, construction is flexible, simple operation, construction safety is high, construction period is short, wide application range, using the steel box girder cast-in-place formwork support developed realizes shortening process, improves construction speed, completes the erection of steel box girder cast-in-place formwork support and the smooth progress of subsequent concrete pouring, saves manpower, financial resources and material resources, reduces installation cost, shortens construction period, and guarantees construction quality and construction safety, it has good positive effect to economic benefit.

Description

Technical Field

[0001] This invention relates to the field of steel box girders, specifically a support device for the construction of cast-in-place steel box girder bridge decks. Background Technology

[0002] Construction of cross-river bridges typically involves prefabricating steel box girders. After the box girders are erected, a steel-concrete composite structure needs to be laid between adjacent girders. The steel-concrete composite beams span the river using traditional formwork scaffolding methods, which require occupying the ground beneath the bridge. If the geological conditions under the bridge are poor or complex, the subsequent support system installation becomes even more difficult. First, the ground under the bridge must be leveled and then hardened to ensure the foundation's bearing capacity. If necessary, concrete hardening may be required. Then, the following steps are followed: placing wooden blocks on the foundation → laying base pads according to the spacing of the uprights → placing ground-level bracing → erecting uprights one by one → installing the first-stage tie rods and clamps → installing the first-stage main horizontal bar → installing wall ties → connecting tie rods → adding scissor bracing → installing safety nets → laying scaffold boards → installing railings and connecting scaffold boards → hanging qualified safety nets according to height → adding diagonal steel wire ropes. This process is cumbersome, wastes manpower, material resources, and financial resources, and also hinders the project from being completed within the stipulated time.

[0003] Therefore, a support device for the construction of cast-in-place steel box girder bridge deck is proposed to address the above problems. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a construction support device for cast-in-place steel box girder bridge deck, comprising multiple steel box girder wing plates, with a support unit provided between adjacent steel box girder wing plates; the support unit includes a support component and a hoisting component; the support component includes multiple sets of channel steel, each set including two channel steels arranged with their backs facing each other, and the back ends of the channel steels are welded together by connecting blocks with a gap reserved, the multiple sets of channel steels are arranged side by side, and the ends of each set of channel steels are connected to the steel box girder wing plates by the hoisting component;

[0006] The hoisting assembly includes a channel-shaped bracket fixed to the upper surface of the steel box girder flange. A top plate is welded to the upper end of the channel-shaped bracket, and the lower end of the channel-shaped bracket is welded to the upper surface of the steel box girder flange. The hoisting assembly also includes a screw rod and a base plate. The screw rod passes through the top plate and the steel box girder flange and extends into the gap between each group of channel steels. The lower end of the screw rod passes through the base plate, and the base plate is placed on the lower surface of the end of the channel steel. Nuts are threaded to both ends of the screw rod.

[0007] Multiple square timbers are laid side by side on the channel steel, with the square timbers perpendicular to the channel steel, and the upper surface of the square timbers is covered with a clear water template.

[0008] Preferably, each of the base plates has two insert plates on its upper surface, the base plate is attached to the lower surface of the end of the channel steel, and the connecting block can be inserted between the two insert plates.

[0009] Preferably, each of the base plates has a fixing seat for fixing nuts on its lower surface, with the screw passing through the base plate and the nut embedded in the fixing seat.

[0010] Preferably, each group of channel steel and steel box girder flanges is further provided with an auxiliary component; the auxiliary component is used to assist the hoisting component in hoisting the channel steel; the auxiliary component includes a hook plate, the upper end of the hook plate is L-shaped, the upper end of the hook plate is fastened to the upper surface of the steel box girder flange, and the lower end of the hook plate is bent vertically and extends into the channel steel, supporting it inside the channel steel.

[0011] Preferably, a support plate is provided on one side of the lower horizontal portion of the hook plate, and the support plate extends horizontally downwards towards the wing plate of the steel box girder.

[0012] Preferably, a pull plate is provided between adjacent hook plates, and the end of the pull plate is provided with a U-shaped clamping plate, so that the body of the hook plate can be embedded in the clamping plate.

[0013] Preferably, each of the card plate port portions is recessed.

[0014] Preferably, the pull plate is provided with reinforcing ribs, which are arranged along the length of the pull plate.

[0015] Preferably, an inclined plate is provided between the hook plate and the support plate, one end of the inclined plate is fixed to the upper edge corner of the support plate, and the other end of the inclined plate is fixed to the lower vertical side wall of the hook plate.

[0016] Preferably, each of the trough-shaped supports is symmetrically provided with a first triangular plate, one right-angled side of the first triangular plate is welded to the back of the inner side of the trough-shaped support, and the other right-angled side of the first triangular plate is welded to the lower surface of the top plate; the two sides of the web of the trough-shaped support are provided with second triangular plates, and the two right-angled sides of the second triangular plates are respectively welded to the upper surface of the web and the flange of the steel box girder.

[0017] The advantages of this invention are:

[0018] 1. This steel box girder cast-in-place bridge deck construction support device optimizes the construction process of cast-in-place steel box girder formwork supports. It eliminates the need for foundation treatment and other procedures using traditional formwork support systems, overcoming the limitations of traditional formwork support systems in handling harsh geological conditions or difficult foundation treatment. Simultaneously, it simplifies procedures, making construction flexible, easy to operate, highly safe, and with a short construction period. Its wide applicability allows for shorter procedures, faster construction speed, and smooth erection of the steel box girder cast-in-place formwork supports and subsequent concrete pouring. This saves manpower, financial resources, and materials, reduces installation costs, shortens the construction period, and ensures construction quality and safety, resulting in significant positive economic benefits.

[0019] 2. By setting up hook plates, the channel steel can be hooked onto the flange of the steel box girder. That is, after the hoisting machine is removed, the channel steel can be further fixed to the flange of the steel box girder through the hook plates, which assists the hoisting components in fixing the channel steel to the flange of the steel box girder, thereby improving reliability and safety. Attached Figure Description

[0020] Figure 1 This is a perspective view of the steel box girder cast-in-place bridge deck construction support device in this invention;

[0021] Figure 2 This is a perspective view of the fit between the screw and the channel steel in this invention;

[0022] Figure 3 This is a schematic diagram of the groove-type support structure in this invention;

[0023] Figure 4 This is a perspective view of the base plate in this invention;

[0024] Figure 5 This is a perspective view of the fit between the hook plate and the wing plate of the steel box girder in this invention;

[0025] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0026] Figure 7 This is a perspective view of the hook plate in this invention;

[0027] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0028] Figure 9 This is a schematic diagram illustrating the fit between the hook plate and the channel steel in this invention;

[0029] Figure 10 This is a perspective view of the interaction between the pull rod and the card plate in this invention.

[0030] In the diagram: 1. Steel box girder wing plate; 2. Channel steel; 3. Connecting block; 4. Channel-shaped bracket; 5. Top plate; 6. Screw rod; 7. Bottom plate; 8. Square timber; 9. Fair-faced concrete formwork; 10. Insert plate; 11. Fixing seat; 12. Hook plate; 121. Conical protrusion; 13. Support plate; 14. Pull plate; 15. Clamping plate; 16. Reinforcing rib; 17. Inclined plate; 18. Triangle plate No. 1; 19. Triangle plate No. 2. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Reference Figure 1 - Figure 4 A construction support device for cast-in-place steel box girder bridge deck includes multiple steel box girder flanges 1, with support units provided between adjacent steel box girder flanges 1; each support unit includes a support assembly and a hoisting assembly; the support assembly includes multiple sets of channel steels 2, each set including two channel steels 2 arranged with their backs facing each other, and the back ends of the channel steels 2 are welded together by connecting blocks 3 with a gap reserved, the multiple sets of channel steels 2 are arranged side by side, and the ends of each set of channel steels 2 are connected to the steel box girder flanges 1 by the hoisting assembly;

[0033] The hoisting assembly includes a channel-shaped bracket 4 fixed to the upper surface of the steel box girder flange 1. A top plate 5 is welded to the upper end of the channel-shaped bracket 4, and the lower end of the channel-shaped bracket 4 is welded to the upper surface of the steel box girder flange 1. The hoisting assembly also includes a screw rod 6 and a base plate 7. The screw rod 6 passes through the top plate 5 and the steel box girder flange 1 and extends into the gap between each group of channel steels 2. The lower end of the screw rod 6 passes through the base plate 7. The base plate 7 is placed on the lower surface of the end of the channel steel 2. Nuts are threaded to both ends of the screw rod 6.

[0034] Multiple square timbers 8 are laid side by side on the channel steel 2. The square timbers 8 are set perpendicular to the channel steel 2. The upper surface of the square timbers 8 is covered with a clear water template 9.

[0035] In this embodiment, a simplified support device for the construction of cast-in-place steel box girder bridge deck is designed to simplify the construction of the support device. Before using the screw rod 6, a PVC pipe is sleeved on the screw rod 6, and then the screw rod 6 is installed. The two channel steels 2 are welded together by the connecting block 3, which also separates the two channel steels 2, leaving a gap for the screw rod 6 to pass through. Then, a hoisting device, such as a hoisting machine, is used to hoist the welded channel steel 2 between two adjacent steel box girders. The end position of the channel steel 2 is adjusted so that the gap of the channel steel 2 is aligned with the channel bracket 4. Then, the screw rod 6 passes through the channel bracket 4 and extends to the bottom of the channel steel 2. Then, the channel steel 2 is fastened to the steel box girder flange 1 by nuts. Next, square timber 8 is laid, and then a clear water formwork 9 is laid on the square timber 8. At this time, the construction of the support device for the cast-in-place steel box girder bridge deck is completed. In summary, the following steps can be summarized: sleeve the PVC pipe on the screw rod 6 → screw rod 6 passes through the channel bracket 4 welded to the steel box girder → two channel steels 2 are welded together as a support device for the construction of cast-in-place steel box girder bridge deck. The main keel → screw 6 passes through the gap of the channel steel 2, and is fixed to the top of the channel bracket 4 and the lower surface of the end of the channel steel 2 respectively with the top plate 5 and the bottom plate 7 and nuts. → The square timber 8, which serves as the secondary keel, is placed on the channel steel 2, and the clear water formwork 9 is laid on the square timber 8. This steel box girder cast-in-place bridge deck construction support device optimizes the construction process of the steel box girder cast-in-place formwork support. It eliminates the need for foundation treatment and other procedures using traditional formwork support systems, solving the problem of the difficulty of handling foundations in poor geological conditions or with high difficulty in handling foundations, which is limited by traditional formwork support systems. At the same time, it simplifies the procedures, makes construction flexible and easy to operate, has high construction safety, short construction period, and wide applicability. The use of the developed steel box girder cast-in-place formwork support has shortened the procedures, increased the construction speed, and successfully completed the erection of the steel box girder cast-in-place formwork support and subsequent concrete pouring. It saves manpower, financial resources and materials, reduces installation costs, shortens the construction period, and ensures construction quality and safety, which has a good positive effect on economic benefits.

[0036] Reference Figure 3 - Figure 4 Each of the base plates 7 has two insert plates 10 on its upper surface. The base plate 7 is attached to the lower surface of the end of the channel steel 2, and the connecting block 3 can be inserted between the two insert plates 10. The base plate 7 is provided with insert plates 10. After the base plate 7 is installed on the channel steel 2, the connecting block 3 is embedded between the two insert plates 10 to fix the relative sliding between the base plate 7 and the channel steel 2, ensuring the stability of the channel steel 2 in the later stage and helping to improve the safety of the support device.

[0037] Reference Figure 4Each of the base plates 7 has a fixing seat 11 for fixing nuts on its lower surface. The screw 6 passes through the base plate 7, and the nut is embedded in the fixing seat 11. By setting the fixing seat 11, after the nut at the lower end of the screw 6 is embedded in the fixing seat 11, the screw 6 can be lifted and the nut at the upper end of the screw 6 can be rotated without manual control of the nut at the lower end of the screw 6. Controlling the nut at the lower end of the screw 6 generally requires a person to place it under the steel box girder flange 1 and control the rotation of the nut for a long time. This position has a high risk factor. With the fixing seat 11, the person does not need to be in this position for a long time. The nut can be embedded in the fixing seat 11, reducing the risk factor.

[0038] Reference Figure 5 - Figure 7 Each set of channel steel 2 and steel box girder flange 1 is further provided with an auxiliary component; the auxiliary component is used to assist the hoisting component in hoisting the channel steel 2; the auxiliary component includes a hook plate 12, the upper end of the hook plate 12 is L-shaped, the upper end of the hook plate 12 is fastened to the upper surface of the steel box girder flange 1, the lower end of the hook plate 12 is vertically bent and extends into the channel steel 2, and supports the channel steel 2; by setting the hook plate 12, the hook plate 12 can hook the channel steel 2 onto the steel box girder flange 1, that is, after the hoisting machine is removed, the channel steel 2 can be further fixed onto the steel box girder flange 1 by the hook plate 12, assisting the hoisting component in fixing the channel steel 2 onto the steel box girder flange 1.

[0039] Reference Figure 5 - Figure 7 The hook plate 12 has a support plate 13 on one side of its lower horizontal portion, which extends horizontally downwards towards the steel box girder flange 1. The support plate 13 at the lower end of the hook plate 12 increases the lifting area of ​​the hook plate 12 on the channel steel 2, increases the support effect of the hook plate 12 on the channel steel 2, and improves the stability between the hook plate 12 and the channel steel 2. For the stability between the hook plate 12 and the steel box girder flange 1, multiple conical protrusions 121 can be provided on the lower surface of the upper horizontal portion of the hook plate 12. The conical protrusions 121 can increase the friction between the hook plate 12 and the steel box girder flange 1, and improve the stability of the hook plate 12 fastened to the upper surface of the steel box girder flange 1.

[0040] Reference Figure 5 - Figure 8 A pull plate 14 is provided between adjacent hook plates 12, and a U-shaped clamping plate 15 is provided at the end of the pull plate 14. The plate body of the hook plate 12 can be embedded in the clamping plate 15. A pull rod is provided to cooperate with the clamping plate 15 to connect the hook plates 12 on both sides of the channel steel 2 together, so as to prevent the lower end of the hook plate 12 from shifting outward, causing the hook plate 12 to lose its hooking function on the channel steel 2.

[0041] Reference Figure 5 - Figure 8Each of the card plates 15 has its port portion recessed; the shape of the end of the card plate 15 port is designed so that after the hook plate 12 is embedded in the card plate 15, the port of the card plate 15 can lock the hook plate 12 inside the card plate 15, so as to prevent the card plate 15 from losing its constraint on the hook plate 12. At the same time, the shape of the card plate 15 port will not affect the subsequent disassembly of the card plate 15 and the hook plate 12. The card plate 15 can be retracted and disengaged from the hook plate 12 by forcefully hammering the port of the card plate 15.

[0042] Reference Figure 10 The pull plate 14 is provided with reinforcing ribs 16, which are arranged along the length of the pull plate 14. The reinforcing ribs 16 improve the strength of the pull plate 14 itself. At the same time, when the clamping plate 15 is installed on the hook plate 12, the port of the clamping plate 15 is aligned with the hook plate 12, and the middle position of the pull plate 14 can be directly hammered. At this time, the clamping plates 15 at both ends of the pull plate 14 can be fastened to the hook plate 12. At the same time, when removing the clamping plates 15 later, the middle position of the pull plate 14 can be hammered forcefully to pull the two clamping plates 15 back and detach them from the hook plate 12, so as to avoid deforming the port of the clamping plate 15 and damaging the port shape of the clamping plate 15.

[0043] Reference Figure 9 An inclined plate 17 is provided between the hook plate 12 and the support plate 13. One end of the inclined plate 17 is fixed to the upper edge corner of the support plate 13, and the other end of the inclined plate 17 is fixed to the lower vertical side wall of the hook plate 12. By setting the inclined plate 17, the strength between the hook plate 12 and the support plate 13 is enhanced, and the lifting stability of the support plate 13 on the channel steel 2 is improved, so that the hook plate 12 and the support plate 13 can lift the channel steel 2 with a larger mass, thereby improving safety.

[0044] Reference Figure 1 and Figure 3 Each of the channel-shaped supports 4 is symmetrically provided with a first triangular plate 18. One right-angled side of the first triangular plate 18 is welded to the inner back of the channel-shaped support 4, and the other right-angled side of the first triangular plate 18 is welded to the lower surface of the top plate 5. The two sides of the web of the channel-shaped support 4 are provided with second triangular plates 19. The two right-angled sides of the second triangular plate 19 are respectively welded to the upper surface of the web and the wing plate 1 of the steel box girder. By setting the first triangular plate 18 and the second triangular plate 19, the strength of the channel-shaped support 4 is improved, so that the channel-shaped support 4 can withstand greater pressure.

[0045] Working Principle: In this embodiment, a simplified support device for the construction of cast-in-place steel box girder bridge deck is designed, simplifying the construction of the support device. Before using the screw rod 6, a PVC pipe is sleeved on the screw rod 6, and then the screw rod 6 is installed. Two channel steels 2 are welded together by connecting blocks 3, which also separate the two channel steels 2, leaving a gap for the screw rod 6 to pass through. Then, a hoisting device, such as a hoisting machine, is used to hoist the welded channel steel 2 between two adjacent steel box girders, and the ends of the channel steel 2 are adjusted. Position the channel steel 2 so that the gap is aligned with the channel bracket 4. Then, insert the screw rod 6 through the channel bracket 4 and extend it to the bottom of the channel steel 2. Then, fasten the channel steel 2 to the steel box girder flange 1 with nuts. Next, lay the square timber 8, and then lay the fair-faced formwork 9 on the square timber 8. At this point, the construction support device for the cast-in-place bridge deck of the steel box girder is completed. In summary, the following steps can be summarized: put the PVC sleeve on the screw rod 6 → insert the screw rod 6 through the channel bracket 4 welded to the steel box girder → weld the two channel steels 2 together. As the main keel, the screw rod 6 passes through the gap of the channel steel 2, and is fixed to the top of the channel bracket 4 and the lower surface of the end of the channel steel 2 respectively with the top plate 5 and the bottom plate 7 and nuts. The square timber 8, which serves as the secondary keel, is placed on the channel steel 2, and the clear water formwork 9 is laid on the square timber 8. This steel box girder cast-in-place bridge deck construction support device optimizes the construction process of the steel box girder cast-in-place formwork support. It eliminates the need for the traditional formwork support system to handle foundation and other procedures, solving the problem of the traditional formwork support system being limited by poor geological conditions, making it impossible or difficult to handle the foundation. At the same time, it simplifies the process, making construction flexible, easy to operate, safe, and with a short construction period. It is also widely applicable. The use of the developed steel box girder cast-in-place formwork support has shortened the process, increased the construction speed, and successfully completed the erection of the steel box girder cast-in-place formwork support and subsequent concrete pouring. It saves manpower, financial resources and materials, reduces installation costs, shortens the construction period, and ensures construction quality and safety, which has a good positive effect on economic benefits.

[0046] Insert plates 10 are provided on the base plate 7. After the base plate 7 is installed on the channel steel 2, the connecting block 3 is embedded between the two insert plates 10 to fix the relative sliding between the base plate 7 and the channel steel 2, ensuring the stability of the channel steel 2 in the later stage and helping to improve the safety of the support device.

[0047] By setting a fixed seat 11, after the nut at the lower end of the screw 6 is embedded in the fixed seat 11, the screw 6 is lifted and the nut at the upper end of the screw 6 is rotated. There is no need for manual control of the nut at the lower end of the screw 6. Controlling the nut at the lower end of the screw 6 usually requires a person to place it under the steel box girder flange 1 and control the rotation of the nut for a long time. This position has a high risk factor. With the fixed seat 11, the person does not need to be in this position for a long time. The nut can be embedded in the fixed seat 11, which reduces the risk factor.

[0048] By setting up hook plate 12, the channel steel 2 can be hooked onto the wing plate 1 of the steel box girder. That is, after the hoisting machine is removed, the channel steel 2 can be further fixed onto the wing plate 1 of the steel box girder through hook plate 12, assisting the hoisting components in fixing the channel steel 2 onto the wing plate 1 of the steel box girder. A support plate 13 is set at the lower end of hook plate 12 to increase the lifting area of ​​hook plate 12 on channel steel 2, increase the support effect of hook plate 12 on channel steel 2, and improve the stability between hook plate 12 and channel steel 2. For the stability between hook plate 12 and wing plate 1 of steel box girder, multiple conical protrusions 121 can be set on the lower surface of the upper horizontal part of hook plate 12. The conical protrusions 121 can increase the friction between hook plate 12 and wing plate 1 of steel box girder, and improve the stability of hook plate 12 fastened to the upper surface of wing plate 1 of steel box girder.

[0049] A pull rod is set up to cooperate with the clamping plate 15 to connect the hook plates 12 on both sides of the channel steel 2, so as to prevent the lower end of the hook plate 12 from shifting outward and causing the hook plate 12 to lose its hooking function on the channel steel 2. The end shape of the clamping plate 15 is designed so that after the hook plate 12 is embedded in the clamping plate 15, the end of the clamping plate 15 can lock the hook plate 12 in the clamping plate 15, so as to prevent the clamping plate 15 from losing its constraint on the hook plate 12. At the same time, the end shape of the clamping plate 15 will not affect the disassembly of the clamping plate 15 and the hook plate 12 in the future. The end of the clamping plate 15 can be hammered to make the clamping plate 15 retract and disengage from the hook plate 12.

[0050] The reinforcing rib 16 enhances the strength of the pull plate 14. During the installation of the clamping plate 15 onto the hook plate 12, the ends of the clamping plate 15 are aligned with the hook plate 12, allowing direct hammering of the middle position of the pull plate 14. At this point, the clamping plates 15 at both ends of the pull plate 14 can be secured to the hook plate 12. Furthermore, when removing the clamping plates 15 later, a forceful hammering of the middle position of the pull plate 14 will retract the two clamping plates 15 from the hook plate 12, preventing deformation and damage to the ends of the clamping plates 15. The inclined plate 17 enhances the strength between the hook plate 12 and the support plate 13, improving the support plate 13's stability in supporting the channel steel 2. This allows the hook plate 12, in conjunction with the support plate 13, to support the channel steel 2 with greater mass, improving safety. The first triangular plate 18 and the second triangular plate 19 enhance the strength of the channel bracket 4, enabling it to withstand greater pressure.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction support device for cast-in-place steel box girder bridge deck, comprising multiple steel box girder flanges (1), characterized in that: A support unit is provided between adjacent steel box girder flanges (1); the support unit includes a support assembly and a hoisting assembly; the support assembly includes multiple sets of channel steel (2), each set including two channel steel (2) arranged with their backs facing each other, and the back ends of the channel steel (2) are welded together by connecting blocks (3) with a gap reserved, the multiple sets of channel steel (2) are arranged side by side, and the ends of each set of channel steel (2) are connected to the steel box girder flange (1) by the hoisting assembly; The hoisting assembly includes a channel-shaped bracket (4) fixed on the upper surface of the steel box girder flange (1), with a top plate (5) welded to the upper end of the channel-shaped bracket (4) and the lower end of the channel-shaped bracket (4) welded to the upper surface of the steel box girder flange (1); the hoisting assembly also includes a screw (6) and a bottom plate (7); the screw (6) passes through the top plate (5) and the steel box girder flange (1) and extends into the gap between each group of channel steels (2), the lower end of the screw (6) passes through the bottom plate (7), the bottom plate (7) is placed on the lower surface of the end of the channel steel (2), and nuts are threaded to the upper and lower ends of the screw (6); Multiple square timbers (8) are laid side by side on the channel steel (2). The square timbers (8) are set perpendicular to the channel steel (2). The upper surface of the square timbers (8) is covered with a clear water template (9). Each of the base plates (7) has two insert plates (10) on its upper surface. The base plate (7) is attached to the lower surface of the end of the channel steel (2). The connecting block (3) can be inserted between the two insert plates (10). Each group of channel steel (2) is also provided with an auxiliary component between the steel box girder flange (1); the auxiliary component is used to assist the hoisting component in hoisting the channel steel (2); the auxiliary component includes a hook plate (12), the upper end of the hook plate (12) is L-shaped, the upper end of the hook plate (12) is fastened to the upper surface of the steel box girder flange (1), the lower end of the hook plate (12) is bent vertically and extends into the channel steel (2) and supports the channel steel (2); The hook plate (12) has a support plate (13) on one side of the lower horizontal part, and the support plate (13) extends horizontally downward to the lower part of the steel box girder wing plate (1); A pull plate (14) is provided between adjacent hook plates (12), and a U-shaped clamping plate (15) is provided at the end of the pull plate (14), and the plate body of the hook plate (12) can be embedded in the clamping plate (15); Each of the card plates (15) is recessed at its port portion; The pull plate (14) is provided with reinforcing ribs (16), which are arranged along the length of the pull plate (14); An inclined plate (17) is provided between the hook plate (12) and the support plate (13). One end of the inclined plate (17) is fixed to the upper edge corner of the support plate (13), and the other end of the inclined plate (17) is fixed to the lower vertical side wall of the hook plate (12).

2. The construction support device for cast-in-place steel box girder bridge deck according to claim 1, characterized in that: Each of the base plates (7) has a fixing seat (11) for fixing nuts on its lower surface. The screw (6) passes through the base plate (7) and the nut is embedded in the fixing seat (11).

3. The construction support device for cast-in-place steel box girder bridge deck according to claim 1, characterized in that: Each of the trough-shaped supports (4) is symmetrically provided with a first triangle plate (18). One right-angle side of the first triangle plate (18) is welded to the back of the trough-shaped support (4), and the other right-angle side of the first triangle plate (18) is welded to the lower surface of the top plate (5). The two sides of the web of the trough-shaped support (4) are provided with second triangle plates (19). The two right-angle sides of the second triangle plate (19) are welded to the upper surface of the web and the wing plate (1) of the steel box girder, respectively.

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