Formwork support for concrete roof of a cavity structure

Abstract

This invention relates to the field of bridge construction, specifically to a concrete roof slab formwork support with a hollow structure. Embedded parts are installed on the side walls of the inner cavity. Steel beam assemblies are placed on the side walls of the inner cavity structure via the resting surfaces of these embedded parts, providing effective support for the steel beam assemblies. After the roof slab is poured and solidified, the size of the unloading block is adjusted, and the unloading block is removed from the central hinge by a first steel wire rope. The central hinge switches from a unidirectional rotation state to a bidirectional rotation state, causing both ends of the steel beam assembly to fall from the resting surfaces of the embedded parts. Subsequently, under the action of a second steel wire rope assembly, the steel beam assembly is lowered from the upper part of the hollow structure to the bottom surface. Due to the design of the steel beam assembly, construction personnel are protected from working in high-risk environments, the dismantling process of the roof slab formwork support is simplified, and the safety and efficiency of dismantling construction are improved. Furthermore, the support of this invention can be reused, avoiding resource waste.

Description

Technical Field

[0001] This invention relates to the field of bridge construction, and more specifically to a cavity-structured concrete roof slab formwork support. Background Technology

[0002] Large hollow thin-walled high piers and bridge towers are generally designed with transverse diaphragm structures. After the top slab of such a cavity structure is completed, how to remove the formwork support in the enclosed space is a key and difficult point in the construction.

[0003] Existing technologies include the following approaches:

[0004] (1) Install embedded parts and erect supports. After the strength of the diaphragm reaches the standard, manually dismantle the supports and remove the components one by one. This method requires workers to face the dual risks of working in a confined space and at height, resulting in low construction efficiency and high safety risks.

[0005] (2) One-time support is used, that is, the support is left in the cavity after the diaphragm is constructed. This method has high construction efficiency, but it wastes a lot of steel and wood, resulting in high engineering material costs. Moreover, the steel support left on the structure will affect the dynamic characteristics of the concrete structure. Summary of the Invention

[0006] To address the aforementioned shortcomings of existing technologies, a hollow-structure concrete roof slab formwork support is provided, which reduces the difficulty and risk of disassembling the formwork support and enables its reuse.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A cavity-structured concrete roof slab formwork support, characterized in that it includes:

[0009] Embedded parts: Several embedded parts are provided on the inner walls of both sides of the cavity structure. The embedded parts are provided with a support surface. All embedded parts are located on the same horizontal plane.

[0010] A steel beam assembly consists of several steel beam assemblies arranged horizontally at intervals between the inner walls of the two sides of the cavity structure. Both ends of the steel beam assembly are placed on the support surface of the embedded parts. The steel beam assembly is composed of a left steel beam, a central hinge, a right steel beam, and a detachment block. One end of the left and right steel beams is fixed to the central hinge and the other end is placed on the support surface. The detachment block is placed in the central hinge in a detachable connection manner. Depending on the disassembly and assembly of the detachment block, the central hinge has two states: unidirectional rotation and bidirectional rotation.

[0011] Horizontal ribs: Several horizontal ribs are laid on the upper part of the steel beam assembly, and the horizontal ribs are laid perpendicular to the steel beam assembly; the top plate formwork is laid on the upper part of the horizontal ribs.

[0012] The system consists of a first wire rope, a second wire rope, and circular pipes. The first wire rope is connected to the unloading block, and the second wire rope is connected to the left and right steel beams. Based on the placement of the first and second wire ropes, several circular pipes are installed on the top plate template. The first and second wire ropes pass through the circular pipes and are connected to the external traction mechanism.

[0013] According to the above technical solution, a horizontal connecting bracket is provided between every two or more adjacent steel beam assemblies, connecting the two or more steel beam assemblies into a whole; the horizontal connecting bracket is arranged perpendicular to the steel beam assemblies; the two ends of the horizontal connecting bracket are respectively fixed to the middle hinge of the two side steel beam assemblies, the left steel beam of the two side steel beam assemblies, or the right steel beam of the two side steel beam assemblies. In the embodiment shown in the figure, a horizontal connecting member is provided between every two steel beam assemblies.

[0014] According to the above technical solution, the middle hinge component consists of a left connector, a right connector, and a pin. The upper part of the inner surface of the left and right connectors is provided with a limiting plane, and the lower part is provided with a connecting ear plate. The lower ear plates of the left and right connectors are connected by a pin, and the height of the horizontal plane where the pin is located is lower than the height of the lower surface of the steel beam. The left and right steel beams are respectively fixed to the outer surfaces of the left and right connectors. When the left and right steel beams are in a horizontal state, the limiting planes of the left and right connectors are parallel to each other and in a vertical state. The distance between the two parallel limiting planes is within the adjustable range of the width of the unloading block.

[0015] According to the above technical solution, a limiting block is fixedly provided on the upper part of the limiting plane of the left and right connecting parts.

[0016] According to the above technical solution, the unloading block includes active adjusting supports located at the upper and lower parts, driven adjusting supports located on the left and right sides, a sliding rod connected between the two driven adjusting supports, and a threaded rod connected between the two active adjusting supports. Both the active adjusting supports and the sliding adjusting supports adopt an isosceles trapezoidal structure, and the trapezoidal inclined surface of the active adjusting support slides against the trapezoidal inclined surface of the driven adjusting support. A connecting plate is fixedly provided on the side of the two driven adjusting supports. The connecting plate has a coaxial through hole, through which the sliding rod passes. Limiting bolts are provided at both ends of the sliding rod, and the spacing of the limiting bolts is adjusted according to the spacing between the two limiting planes. One end of the threaded rod is provided on the lower active adjusting support in a rotatable connection manner. A threaded hole is provided on the upper active adjusting support, and the upper active adjusting bracket is sleeved on the threaded rod. The other end of the threaded rod passes through a circular tube located on the top plate template.

[0017] According to the above technical solution, each first wire rope has two branch ropes at its bottom end, and the two branch ropes are respectively connected to the sides of two adjacent unloading blocks. The top end of the first wire rope passes through a round tube and is placed on the top plate.

[0018] According to the above technical solution, each steel beam assembly is equipped with two embedded parts; the embedded parts include anchoring steel bars and corbels, and the corbels are fixed to the inner walls of both sides of the cavity structure by the anchoring steel bars.

[0019] According to the above technical solution, each steel beam assembly is equipped with two second steel wire ropes and matching round pipes. The second steel wires are respectively connected to the left and right steel beams of the steel beam assembly.

[0020] According to the above technical solution, the position of the round pipe is arranged according to the arrangement of the unloading block, the first steel wire rope and the second steel wire rope; an opening is provided on the top plate template, the round pipe is inserted into the opening, and foam glue is injected between the round pipe and the top plate template.

[0021] According to the above technical solution, the support surface adopts a planar or upwardly inclined planar design, and the two ends of the steel beam assembly are provided with mating surfaces that match the support surface; the size of the support surface is based on the two sides of the steel beam assembly around the central hinge.

[0022] The present invention has the following beneficial effects:

[0023] 1. Embedded parts are installed on the side walls of the inner cavity. The steel beam assembly is placed on the side walls of the inner cavity structure through the support surfaces of the embedded parts, which effectively support the steel beam assembly. When constructing the top formwork of the top slab, the unloading block is installed inside the central hinge, which effectively restricts the left and right steel beams from rotating upwards around the central hinge (in reality, the central hinge moves downwards), meaning the left and right steel beams can only rotate downwards in one direction. At this time, the top of the steel beam assembly can support the transverse ribs and top slab formwork located above the steel beam assembly without collapsing. After the top slab is poured and solidified, the size of the unloading block is adjusted, and the unloading block is removed from the central hinge by the first steel wire rope. Since there is no limiting force from the unloading block, the central hinge switches from a unidirectional rotation state to a bidirectional rotation state. At this point, without the restraint of the unloading block, the middle hinge of the steel beam assembly moves downward under the action of gravity, and the distance between the outer ends of the two steel beams decreases, causing the two ends of the steel beam assembly to fall from the support surface of the embedded part; then, under the action of the second wire rope assembly, the steel beam assembly is lowered from the high point of the cavity structure to the bottom surface of the cavity structure; finally, the steel beam assembly is lifted out of the manhole by the second wire rope.

[0024] Based on the above measures, workers are completely prevented from dismantling the roof formwork support in high-altitude areas within enclosed spaces, and there is no need to build a dismantling platform at the bottom of the roof formwork support. Compared with traditional manual dismantling methods, the design of the steel beam components avoids construction workers working in high-risk environments, simplifies the roof formwork support dismantling process, and improves the safety and efficiency of dismantling construction. In addition, compared with traditional disposable support methods, the support of this invention can be reused, avoiding resource waste.

[0025] 2. Due to the design of the horizontal connecting bracket, two or more steel beam components are connected into a whole; compared with the previous design, it is equivalent to changing from a "line" to a "surface", which improves the overall stability of the steel beam components. In addition, due to the design of the horizontal connecting bracket, the horizontal connecting frame connects two or more steel beam components to form a standard unit. Construction workers can carry out construction work with a standard unit, simplifying the construction process and making it easier to use a second steel wire rope to lift the standard unit out as a whole later. Attached Figure Description

[0026] Figure 1 This invention relates to a type of bridge pier and diaphragm with a cavity structure to which this invention is applicable;

[0027] Figure 2 This is an elevation view of the completed installation according to an embodiment of the present invention;

[0028] Figure 3 This is a plan view after installation according to an embodiment of the present invention;

[0029] Figure 4 This is an isometric view of an embodiment provided by the present invention after installation.

[0030] Figure 5 The overall structure provided in this invention consists of a steel beam assembly and horizontal connectors.

[0031] Figure 6 This is a schematic diagram of the structure between the central hinge and the unloading block in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the embedded part provided in an embodiment of the present invention;

[0033] Figure 8 This is the disassembly process one provided in the embodiment of the present invention;

[0034] Figure 9 This is the second disassembly process provided in the embodiment of the present invention;

[0035] Figure 10 This is the third disassembly process provided in the embodiment of the present invention;

[0036] Figure 11 This is the fourth disassembly process provided in the embodiment of the present invention;

[0037] In the diagram, 1. Embedded part; 1-1. Anchoring steel bar; 1-2. Corbel; 2. Left steel beam; 3. Middle hinge; 3-1. Left connecting part; 3-2. Right connecting part; 3-3. Pin; 3-4. Limiting plane; 3-5. Connecting ear plate; 4. Right steel beam; 5. Unloading block; 5-1. Threaded rod; 6. Horizontal rib; 7. First wire rope; 8. Second wire rope; 9. Round pipe; 10. Horizontal connecting bracket; 11. Cavity structure; 12. Top plate. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Reference Figures 1 to 11 As shown, the present invention provides a cavity structure concrete roof slab formwork support.

[0040] Example 1

[0041] include

[0042] Embedded part 1: Several embedded parts are provided on the inner walls of both sides of the cavity structure 11. The embedded parts are provided with a support surface. All embedded parts are located on the same horizontal plane.

[0043] A steel beam assembly consists of several steel beam assemblies arranged horizontally at intervals between the inner walls of the two sides of the cavity structure. The two ends of the steel beam assembly are placed on the support surface of the embedded parts. The steel beam assembly is composed of a left steel beam 2, a middle hinge 3, a right steel beam 4, and a detachment block 5. One end of the left and right steel beams is fixed to the middle hinge, and the other end is placed on the support surface. The detachment block is placed in the middle hinge in a detachable connection manner. Depending on the disassembly and assembly of the detachment block, the middle hinge has two states: one-way rotation and two-way rotation.

[0044] Horizontal ribs 6: Several horizontal ribs are laid on the upper part of the steel beam assembly, and the horizontal ribs are laid perpendicular to the steel beam assembly; the top plate formwork (top plate 12 as shown in the figure) is laid on the upper part of the horizontal ribs.

[0045] The structure consists of a first steel wire rope (7), a second steel wire rope (8), and a circular pipe (9). The first steel wire rope is connected to the unloading block; the second steel wire rope is connected to the left and right steel beams. Several circular pipes are installed on the top slab formwork according to the placement of the first and second steel wire ropes. The first and second steel wire ropes pass through these circular pipes and are connected to the external traction mechanism. The top slab formwork is made of plywood, and the transverse ribs are made of timber.

[0046] In this embodiment, embedded parts are set on the sidewalls of the inner cavity. The steel beam assembly is placed on the sidewalls of the inner cavity structure through the support surface of the embedded parts, which effectively supports the steel beam assembly. When constructing the top formwork of the top slab, the unloading block is installed in the central hinge, which is equivalent to restricting the left and right steel beams to rotate upward with the central hinge as the rotation center (in reality, the central hinge moves downward), that is, the left and right steel beams can only rotate downward in one direction. At this time, the top of the steel beam assembly can support the transverse ribs and top slab template located above the steel beam assembly without collapsing. After the top slab is poured and solidified, the size of the unloading block is adjusted, and the unloading block is removed from the central hinge by the first steel wire rope. Since there is no limiting force from the unloading block, the central hinge switches from a unidirectional rotation state to a bidirectional rotation state. At this point, without the restraint of the unloading block, the middle hinge of the steel beam assembly moves downward under the action of gravity, and the distance between the outer ends of the two steel beams decreases, causing the two ends of the steel beam assembly to fall from the support surface of the embedded part; then, under the action of the second wire rope assembly, the steel beam assembly is lowered from the high point of the cavity structure to the bottom surface of the cavity structure; finally, the steel beam assembly is lifted out of the manhole by the second wire rope.

[0047] Based on the above measures, workers are completely prevented from dismantling the roof formwork support in high-altitude areas within enclosed spaces, and there is no need to build a dismantling platform at the bottom of the roof formwork support. Compared with traditional manual dismantling methods, the design of the steel beam components avoids construction workers working in high-risk environments, simplifies the roof formwork support dismantling process, and improves the safety and efficiency of dismantling construction. In addition, compared with traditional disposable support methods, the support of this invention can be reused, avoiding resource waste.

[0048] Example 2

[0049] The structure and principle of Example 2 are similar to those of Example 1, except that: Figure 3-4 As shown, to ensure the stability of the steel beam assembly and prevent lateral instability, a horizontal connecting bracket 10 is provided between every two or more adjacent steel beam assemblies. The horizontal connecting bracket connects two or more steel beam assemblies into a whole; the horizontal connecting bracket is arranged perpendicular to the steel beam assembly; both ends of the horizontal connecting bracket are fixed to the middle hinge of the two side steel beam assemblies, the left steel beam of the two side steel beam assemblies, or the right steel beam of the two side steel beam assemblies, respectively. In the embodiment shown in the figure, a horizontal connecting member is provided between every two steel beam assemblies.

[0050] In this embodiment, the design of the horizontal connecting bracket connects two or more steel beam components into a whole; compared to before the horizontal connecting bracket was installed, it is equivalent to changing from a "line" to a "surface", which improves the overall stability of the steel beam components. In addition, due to the design of the horizontal connecting bracket, the horizontal connecting frame connects two or more steel beam components to form a standard unit. Construction workers can carry out construction work with a standard unit, simplifying the construction process and making it easier to use a second steel wire rope to lift the standard unit out as a whole later.

[0051] Example 3

[0052] The structure and principle of Example 3 are similar to those of Example 1 or 2, except that: Figure 5-6 As shown, a preferred structural form of the central hinge is provided. The central hinge comprises a left connector 3-1, a right connector 3-2, and a pin 3-3. A limiting plane 3-4 is provided on the upper part of the inner surface of the left and right connectors, and a connecting ear plate 3-5 is provided on the lower part. The lower ear plates of the left and right connectors are connected by the pin, and the horizontal plane of the pin is lower than the height of the lower surface of the steel beam. The left and right steel beams are respectively fixed to the outer surfaces of the left and right connectors. When the left and right steel beams are in a horizontal state, the limiting planes of the left and right connectors are parallel to each other and in a vertical state. The distance between the two parallel limiting planes is within the adjustable range of the width of the unloading block. In the embodiment shown in the figure, two horizontal connectors are provided on two adjacent steel beam assemblies. The horizontal connectors are respectively connected between the left and right connectors of the two central hinges by bolts.

[0053] In this embodiment, the width of the unloading block is adjusted to be the same as the distance between the two parallel limiting planes, and the unloading block is placed between the two limiting planes. At this time, due to the limiting effect of the unloading block, the left and right connecting parts of the middle hinge cannot be effectively rotated upward around the pin axis, which means that the steel beam assembly cannot slide off the support surface. When it is necessary to disassemble the steel beam assembly, simply reduce the width of the unloading block and use the first wire rope assembly to remove the unloading block from between the two limiting planes, thereby switching the state of the middle hinge and facilitating the disassembly of the steel beam assembly from the support surface.

[0054] In embodiment 3, in order to improve the connection reliability between the unloading block and the left and right connecting parts, a limiting block can be fixedly provided on the upper part of the limiting plane of the left and right connecting parts; the limiting block is used to restrict the unloading block from sliding upward between the two limiting planes.

[0055] In embodiment 3, in order to facilitate the first wire rope to remove the unloading block laterally between the middle hinges, each first wire rope is provided with two branch ropes at its bottom end. The two branch ropes are respectively connected to the sides of two adjacent unloading blocks, and the top end of the first wire rope passes through the round tube and is placed on the top of the top plate.

[0056] After the lateral dimension of the unloading block is reduced, the top of the first wire rope is pulled, and the two branch ropes at the bottom of the first wire rope provide inclined tension to the unloading block, thereby pulling the unloading block out between the two limiting planes of the middle hinge.

[0057] Example 4

[0058] The structure and principle of Example 4 are similar to those of Example 3, except that: Figure 5-6 As shown, based on Embodiment 3, a common unloading block structure is presented. The unloading block is a common existing structure, and other forms of unloading blocks can also be used in this invention. The unloading block includes active adjustment supports located at the upper and lower parts, driven adjustment supports located on the left and right sides, a sliding rod connected between the two driven adjustment supports, and a threaded rod 5-1 connected between the two active adjustment supports. Both the active adjustment supports and the sliding adjustment supports adopt an isosceles trapezoidal structure, and the trapezoidal inclined surface of the active adjustment support slides against the trapezoidal inclined surface of the driven adjustment support. A connecting plate is fixedly provided on the side of the two driven adjustment supports. The connecting plate has a coaxial through hole, through which the sliding rod passes. Limiting bolts are provided at both ends of the sliding rod, and the spacing of the limiting bolts is adjusted according to the spacing between the two limiting planes. One end of the threaded rod is provided on the lower active adjustment support in a rotatable connection manner. A threaded hole is provided on the upper active adjustment support, and the upper active adjustment bracket is sleeved on the threaded rod. The other end of the threaded rod passes through a circular tube located on the top plate template. In this embodiment, the position of the connecting plate can be adjusted as needed, or even the connecting plate can be removed and the through hole can be set on the two driven adjustment supports, as long as the through hole is not in the area between the two limiting planes.

[0059] In this embodiment, as the threaded rod rotates, the spacing between the active adjustment supports decreases. Since a trapezoidal sliding contact surface is provided between the active and driven adjustment supports, as the spacing between the active adjustment supports decreases, the spacing between the driven adjustment supports gradually increases until it contacts the two limiting planes of the central hinge, thereby achieving the switching of the state of the central hinge, that is, switching from bidirectional rotation to unidirectional rotation.

[0060] In the above embodiments 1-4, preferably, as follows: Figure 7 As shown, each steel beam assembly is equipped with two embedded parts; the embedded parts include anchor bars 1-1 and corbels 1-2, with the corbels fixed to the inner walls of both sides of the cavity structure by the anchor bars. In this embodiment, both ends of the steel beam assembly rest on the support surface formed by the corbels.

[0061] In the above embodiments 1-4, preferably, each steel beam assembly is equipped with two second steel wire ropes and matching round tubes, with the second steel wires respectively connected to the left and right steel beams of the steel beam assembly.

[0062] In the above embodiments 1-4, preferably, the position of the round pipe is arranged according to the arrangement of the unloading block, the first wire rope and the second wire rope; an opening is provided on the top plate template, the round pipe is inserted into the opening, and foam glue is injected between the round pipe and the top plate template to prevent grout leakage.

[0063] In the above embodiments 1-4, preferably, the support surface adopts a planar or upwardly inclined planar design, and the two ends of the steel beam assembly are provided with mating surfaces that match the support surface; the size of the support surface is based on the two sides of the steel beam assembly around the central hinge member.

[0064] like Figure 8-11 As shown, the disassembly process of this invention is as follows:

[0065] 1. Install pre-embedded steel bars in advance when pouring the pier wall, and install corbels after removing the pier wall formwork. After assembling the steel beam components, place both ends on the corbels.

[0066] 2. Evenly distribute transverse ribs horizontally and fully cover the top slab formwork. Make multiple holes in the top slab formwork and insert multiple plastic round pipes. Thread the second steel wire rope through the corresponding round pipe and connect it to the steel beam; thread the first steel wire rope through the corresponding round pipe and connect it to the unloading block. Then install the transverse diaphragm reinforcement and pour concrete.

[0067] 3. After the concrete of the diaphragm reaches the design strength, tighten the second steel wire rope.

[0068] 4. Use a wrench to rotate the threaded rod of the unloading block to adjust its lateral dimension. After the unloading block is loosened, pull the first steel wire rope, and the unloading block will fall from the side of the central hinge.

[0069] 5. Loosen the second wire rope, and the middle hinge of the steel beam assembly will rotate and fall downwards until both ends of the steel beam assembly slide off the bracket.

[0070] 6. Continue lowering the steel beams, rotating the left and right sides of the steel beam assembly in opposite directions until they fold in half. Lower the entire steel beam to the bottom of the cavity, and then lift each standard unit out through the manhole in sequence.

[0071] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A concrete roof formwork support for a caved structure, characterised in that: include Embedded parts: Several embedded parts are provided on the inner walls of both sides of the cavity structure. The embedded parts are provided with a support surface. All embedded parts are located on the same horizontal plane. A steel beam assembly consists of several steel beam assemblies arranged horizontally at intervals between the inner walls of the two sides of the cavity structure. Both ends of the steel beam assembly are placed on the support surface of the embedded parts. The steel beam assembly is composed of a left steel beam, a central hinge, a right steel beam, and a detachment block. One end of the left and right steel beams is fixed to the central hinge and the other end is placed on the support surface. The detachment block is placed in the central hinge in a detachable connection manner. Depending on the disassembly and assembly of the detachment block, the central hinge has two states: unidirectional rotation and bidirectional rotation. The central hinge consists of a left connector, a right connector, and a pin. The upper part of the inner surface of the left and right connectors has a limiting plane, and the lower part has a connecting lug. The lower lugs of the left and right connectors are connected by a pin, and the horizontal plane of the pin is lower than the height of the lower surface of the steel beam. The left and right steel beams are fixed to the outer surfaces of the left and right connectors respectively. When the left and right steel beams are horizontal, the limiting planes of the left and right connectors are parallel and vertical. The distance between the two parallel limiting planes is within the adjustable range of the unloading block's width. The unloading block includes active adjusting supports at the top and bottom, driven adjusting supports at the left and right sides, a sliding rod connecting the two driven adjusting supports, and a threaded rod connecting the two active adjusting supports. Both the active and sliding adjusting supports adopt an isosceles trapezoidal structure, and the trapezoidal inclined surface of the active adjusting support slides against the trapezoidal inclined surface of the driven adjusting support. Connecting plates are fixed on the sides of the two driven adjusting supports. The connecting plates have coaxial through holes, through which the sliding rod passes. Limiting bolts are provided at both ends of the sliding rod, and the spacing of the limiting bolts is adjusted according to the spacing between the two limiting planes. One end of the threaded rod is rotatably connected to the lower active adjusting support. The upper active adjusting support has a threaded hole, and the upper active adjusting bracket is fitted onto the threaded rod. The other end of the threaded rod passes through a circular tube located on the top plate template. Horizontal ribs: Several horizontal ribs are laid on the upper part of the steel beam assembly, and the horizontal ribs are laid perpendicular to the steel beam assembly; the top plate formwork is laid on the upper part of the horizontal ribs. The system consists of a first wire rope, a second wire rope, and circular pipes. The first wire rope is connected to the unloading block, and the second wire rope is connected to the left and right steel beams. Based on the placement of the first and second wire ropes, several circular pipes are installed on the top plate template. The first and second wire ropes pass through the circular pipes and are connected to the external traction mechanism.

2. A concrete roof formwork support for a caver structure according to claim 1, characterised in that: A horizontal connecting bracket is provided between every two or more adjacent steel beam assemblies, which connects the two or more steel beam assemblies into a whole; the horizontal connecting bracket is arranged perpendicular to the steel beam assemblies; the two ends of the horizontal connecting bracket are respectively fixed to the middle hinge of the two side steel beam assemblies, the left steel beam of the two side steel beam assemblies, or the right steel beam of the two side steel beam assemblies, and a horizontal connecting piece is provided between every two steel beam assemblies.

3. A concrete roof formwork support for a caver structure according to claim 1, characterised in that: Limiting blocks are fixedly installed on the upper part of the limiting plane of both the left and right connecting parts.

4. The concrete roof formwork support of a cavity structure according to claim 1, characterized in that: Each first wire rope has two branch ropes at its bottom end, and the two branch ropes are respectively connected to the sides of two adjacent unloading blocks. The top end of the first wire rope passes through a round tube and is placed on the top plate.

5. The concrete roof formwork support of a cavity structure according to claim 1, characterized in that: Each steel beam assembly is equipped with two embedded parts; the embedded parts include anchor bars and corbels, which are fixed to the inner walls on both sides of the cavity structure by the anchor bars.

6. A concrete roof formwork support for a caver structure according to claim 1, characterised in that: Each steel beam assembly is equipped with two second steel wire ropes and matching round tubes, with the second steel wires connected to the left and right steel beams of the steel beam assembly respectively.

7. The concrete roof slab formwork support for the cavity structure according to claim 1, characterized in that: The position of the round pipe is determined according to the arrangement of the unloading block, the first wire rope, and the second wire rope; an opening is provided on the top plate template, the round pipe is inserted into the opening, and foam adhesive is injected between the round pipe and the top plate template.

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