Construction device for pouring steel-concrete composite beam

Abstract

The utility model provides a construction device for pouring a steel-concrete composite beam, which comprises a reverse hoisting system extending along the width direction of a steel box beam, the bottom of the reverse hoisting system is connected with the steel box beam, and at least one end of the reverse hoisting system extends out of one side of the steel box beam to form a cantilever end for pouring. The opposite-pulling system is connected with the top of the reverse-hanging system and extends downwards to be used for adjusting the hanging height of the panel system, the panel system is connected with the bottom of the opposite-pulling system, and after concrete pouring is completed, one part of the reverse-hanging system is buried in the cantilever end to form one part of the steel-concrete composite beam. According to the construction device for pouring the steel-concrete composite beam, the face plate system is fixed through the transversely-arranged reverse hanging system, a supporting longitudinal beam is omitted, the construction requirement is still met, the construction budget is greatly reduced, and the construction period is shortened; a part of the reverse hoisting system is buried in the cantilever end to form a part of the steel-concrete composite beam, which is equivalent to a skeleton structure in the cantilever end, so that the structural strength and toughness of the cantilever end are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering technical field more specifically, relate to a kind of construction device for steel-concrete composite beam pouring. BACKGROUND

[0002] With the rapid development of bridge engineering, bridge span is larger and larger, while bridge construction environment is also complex, and the construction technology requirement is higher and higher, the span of concrete bridge gradually cannot meet the requirement of large-span bridge, and steel structure bridge emerges as the times require, but due to high cost of steel structure bridge, it can only be limited to use in some areas, so a kind of steel-concrete composite beam bridge using concrete compression and steel structure stress develops rapidly, and gradually is widely used, especially widely used in urban bridge.

[0003] Patent No. 201310328543.1 discloses a steel-concrete composite box girder concrete wing plate formwork and construction method, comprising a plurality of support beams, a plurality of support beams, two rows of support columns, a plurality of pull rods, a plurality of nuts, a plurality of gaskets, a plurality of longitudinal ribs, a plurality of steel cover plate brackets and a plurality of steel cover plates. By setting steel cover plate on the steel box girder top plate that has been erected, the steel cover plate and the steel box girder form a formwork system, which not only solves the problem of no support construction during road crossing construction, but also does not require large lifting equipment during specific construction, and can be installed by manual operation, and the bottom mold elevation can be adjusted very conveniently and accurately, so the precision is high.

[0004] However, the technical scheme of the above patent has the following disadvantages:

[0005] 1. The strength and toughness of the two side wing plates of the steel-concrete composite box girder are insufficient;

[0006] 2. Support beams need to be set, resulting in high budget and long construction period;

[0007] 3. When the bridge span is wide, the support beam is long, and lifting equipment is needed for lifting. SUMMARY

[0008] The utility model provides a kind of construction device for steel-concrete composite beam pouring, to solve the technical problems that the strength and toughness of the two side wing plates of the steel-concrete composite box girder in prior art are insufficient, and the construction device structure is complex, resulting in high budget and long construction period.

[0009] This utility model provides a construction device for casting steel-concrete composite beams. The steel-concrete composite beams are made by setting main reinforcement bars on the top of a steel box girder and pouring concrete. The construction device includes an anti-suspension system extending along the width direction of the steel box girder. The bottom of the anti-suspension system is connected to the steel box girder. At least one end of the anti-suspension system extends out of one side of the steel box girder to form a cantilever end for casting. A tie system is connected to the top of the anti-suspension system and extends downward to adjust the suspension height of the panel system. The panel system is connected to the bottom of the tie system. After the concrete is poured, a part of the anti-suspension system is embedded in the cantilever end to form part of the steel-concrete composite beam.

[0010] Furthermore, the anti-suspension system includes lateral supports, which consist of horizontally arranged crossbeams and legs arranged at both ends of the crossbeams to support them. The bottoms of the two legs are connected to the steel box girder.

[0011] Furthermore, the anti-suspension system includes a tie rod and an extended end. The extended end is located at one end of the transverse support and extends horizontally in the opposite direction. One end of the tie rod is fixed through the extended end, and the other end of the tie rod fixes the longitudinally arranged main reinforcement.

[0012] Furthermore, the tie rod hooks onto the longitudinally arranged main reinforcement bars via hooks.

[0013] Furthermore, the panel system includes a template for casting the bottom, and the tie system fixes the template and adjusts the hanging height of the template.

[0014] Furthermore, the panel system also includes a skeleton mesh, which is disposed at the bottom of the template.

[0015] Furthermore, the skeletal grid is composed of square timbers arranged in a crisscross pattern.

[0016] Furthermore, the tie system includes a screw, a butterfly buckle bracket, and steel pipes. The screw is vertically arranged, and two butterfly buckle brackets are arranged opposite each other at the upper and lower ends of the screw. One end of the screw is connected to the anti-suspension system through the butterfly buckle bracket, and the other end of the screw is connected to the two steel pipes through the butterfly buckle bracket.

[0017] Furthermore, the butterfly buckle frame can move axially relative to the screw, and the bottom of the skeleton grid is fixed by the steel pipe.

[0018] Furthermore, the lateral support is a double-segment structure spaced longitudinally along the steel box girder.

[0019] The beneficial effects of this utility model are:

[0020] This invention discloses a construction device for casting steel-concrete composite beams. It connects to a panel system via a reverse-suspension system extending along the width of the steel box girder. The suspension height of the panel system is adjusted via a tie-down system, eliminating the need for longitudinal support beams to meet casting requirements. The portion of the reverse-suspension system extending beyond the side of the steel box girder forms a cantilever end. During casting, a portion of the reverse-suspension system is embedded within the cantilever end, forming part of the steel-concrete composite beam. This embedded reverse-suspension system constitutes the skeleton structure within the cantilever end. This construction device for casting steel-concrete composite beams uses a transversely arranged reverse-suspension system to fix the panel system, eliminating the need for longitudinal support beams while still meeting construction requirements. This significantly reduces construction budget, shortens the construction period, and saves time and labor. By embedding a portion of the reverse-suspension system within the cantilever end to form part of the steel-concrete composite beam, it acts as a skeleton structure within the cantilever end, increasing the structural strength and toughness of the cantilever end, ensuring safety and reliability.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is another overall structural schematic diagram of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the fit between the steel box girder and the transverse connecting beam in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the steel-concrete composite beam after the casting is completed according to this utility model;

[0027] Figure 5 This is a schematic cross-sectional view of an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle;

[0029] Figure 7 This is a cross-sectional structural schematic diagram of another embodiment of the present invention;

[0030] Figure 8 This is a front view of the lateral support away from the protruding end in an embodiment of this utility model;

[0031] Figure 9This is a top view of the lateral support away from the protruding end in an embodiment of this utility model;

[0032] Figure 10 This is a front view of the lateral support near the protruding end in an embodiment of this utility model;

[0033] Figure 11 This is a top view of the lateral support near the protruding end in an embodiment of this utility model;

[0034] Figure 12 This is a schematic diagram of the tie rod arrangement in an embodiment of this utility model;

[0035] Figure 13 This is a schematic diagram of the first pouring area in an embodiment of this utility model;

[0036] Figure 14 yes Figure 13 Enlarged view of section B in the middle.

[0037] Figure label:

[0038] 1. Steel box girder; 2. Main reinforcement; 3. Reverse suspension system; 4. Cantilever end; 5. Tie system; 6. Panel system; 7. Casting cut surface; 8. First casting area; 9. Second casting area;

[0039] Transverse connecting beam 11;

[0040] 31. Lateral support; 32. Crossbeam; 33. Outrigger; 34. Tie rod; 35. Extended end; 36. Hook;

[0041] 51. Screw; 52. Butterfly buckle bracket; 53. Steel pipe;

[0042] Template 61; Skeleton grid 62; Square timber 63. Detailed Implementation

[0043] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0048] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] The following describes in detail, with reference to the accompanying drawings, a construction device for casting steel-concrete composite beams according to an embodiment of the present invention.

[0052] According to an embodiment of the present invention, a construction device for casting a steel-concrete composite beam is provided. The steel-concrete composite beam is made by setting main reinforcement 2 on the top of a steel box girder 1 and pouring concrete. The construction device includes an anti-suspension system 3 extending along the width direction of the steel box girder 1. The bottom of the anti-suspension system 3 is connected to the steel box girder 1. At least one end of the anti-suspension system 3 extends out of one side of the steel box girder 1 to form a cantilever end 4 for casting. A tie system 5 is connected to the top of the anti-suspension system 3 and extends downward to adjust the suspension height of the panel system 6. The panel system 6 is connected to the bottom of the tie system 5. After the concrete is poured, a part of the anti-suspension system 3 is embedded in the cantilever end 4 to form a part of the steel-concrete composite beam.

[0053] In other words, the construction device for casting steel-concrete composite beams according to an embodiment of the present invention is mainly used to make steel-concrete composite beams, which are made by setting main reinforcement bars 2 on the top of steel box beams 1 and pouring concrete.

[0054] like Figure 3 As shown, the dimensions and other performance parameters of the steel box girder 1 are prefabricated according to design requirements and then transported to the construction site. Based on the bridge width design requirements, multiple steel box girders 1 can be arranged at intervals along the width direction. Adjacent steel box girders 1 are connected by transverse connecting beams 11 and welded together. Cantilever ends 4 are provided on both sides of the steel box girder 1 as needed. A schematic diagram of the bridge after pouring using the construction device of this embodiment is shown in the reference diagram. Figure 4 .

[0055] The construction device includes an anti-lifting system 3 extending along the width direction of the steel box girder 1. Multiple anti-lifting systems 3 are arranged at intervals along the length direction of the steel box girder 1 to form multiple rows of anti-lifting systems 3. The bottom of the anti-lifting system 3 is connected to the steel box girder 1, preferably by welding. Figure 5 , Figure 7 As shown, depending on the bridge width requirements, one or more rows of anti-suspension systems 3 can be installed along the width of the steel box girder 1. At least one end of the anti-suspension system 3 near both sides extends out to one side of the steel box girder 1 to form a cantilever end 4 for casting. The tie system 5 is installed vertically, with its top end connected to the top of the anti-suspension system 3 and its bottom end connected to the panel system 6, allowing for adjustment of the suspension height of the panel system 6. The panel system 6 serves as the load-bearing component for concrete casting. After the concrete is poured, a portion of the anti-suspension system 3 is embedded in the cantilever end 4 to form part of the steel-concrete composite beam.

[0056] According to this utility model, a construction device for casting steel-concrete composite beams comprises an inverted suspension system 3 extending along the width direction of a steel box girder 1 and connected to a panel system 6. The suspension height of the panel system 6 is adjusted via a tie system 5, allowing casting requirements to be met without the need for supporting longitudinal beams. The portion of the inverted suspension system 3 extending beyond the side of the steel box girder 1 forms a cantilever end 4. During casting of the cantilever end 4, a portion of the inverted suspension system 3 is embedded within the cantilever end 4, forming part of the steel-concrete composite beam. The inverted suspension system 3 embedded within the cantilever end 4 forms the skeleton structure within the cantilever end 4. By setting one or more rows of inverted suspension systems 3 along the width direction of the steel box girder 1, different width design requirements can be accommodated, reducing the weight of a single inverted suspension system 3. The construction device for casting steel-concrete composite beams of this utility model fixes the panel system 6 through the horizontally arranged anti-lifting system 3, eliminating the need for supporting longitudinal beams while still meeting construction requirements, greatly reducing construction budget, shortening construction cycle, and saving time and labor; by embedding a part of the anti-lifting system 3 in the cantilever end 4 to form part of the steel-concrete composite beam, it is equivalent to the skeleton structure in the cantilever end 4, increasing the structural strength and toughness of the cantilever end 4, making it safe and reliable; by setting one or more rows of anti-lifting systems 3, the weight of a single anti-lifting system 3 is reduced, reducing reliance on lifting equipment and lowering construction costs.

[0057] According to one embodiment of the present invention, the anti-suspension system 3 includes a transverse support 31, which consists of a horizontally arranged crossbeam 32 and legs 33 arranged at both ends of the crossbeam 32 for supporting the crossbeam 32. The bottom of the two legs 33 is connected to the steel box girder 1.

[0058] In other words, such as Figure 1 , Figure 8 , Figure 9 As shown, the inverted suspension system 3 mainly consists of a transverse support 31, which includes a crossbeam 32 and vertically arranged legs 33. Two legs 33 are respectively located at both ends of the crossbeam 32. The connection between the crossbeam 32 and the legs 33 is preferably welded, and the bottom of the legs 33 is welded to the steel box girder 1. The inverted suspension system 3 forms a support system by welding the legs 33 to the steel box girder 1, which is used to suspend and adjust the height of the panel system 6.

[0059] According to one embodiment of the present invention, the anti-suspension system 3 includes a tie rod 34 and an extension end 35. The extension end 35 is disposed at one end of the transverse support 31 and extends horizontally in the opposite direction. One end of the tie rod 34 is fixed by the extension end 35, and the other end of the tie rod 34 fixes the longitudinally arranged main reinforcement 2.

[0060] In other words, such as Figure 5 , Figure 6 , Figure 12As shown, the inverted suspension system 3 also includes tie bars 34 and protruding ends 35. The protruding ends 35 are located at one end of the transverse support 31 and extend horizontally towards the cantilever end 4, forming part of the cantilever end 4. Before pouring, multiple transversely and longitudinally arranged main reinforcing bars 2, preferably steel bars, are often installed into the space to be poured to increase the strength of the concrete structure. The tie bars 34 are vertically arranged, forming an inverted U-shaped structure. The top of the tie bars 34 is fixed by the protruding ends 35, preferably by welding. The other end of the tie bars 34 fixes the longitudinally arranged main reinforcing bars 2.

[0061] According to one embodiment of the present invention, the tie bar 34 hooks the longitudinally arranged main rib 2 with a hook 35.

[0062] in other words, Figure 6 , Figure 12 As shown, the bottom end of the tie bar 35 is provided with a hook 35. The hook 35 adopts a 180° hook structure to hook the longitudinally arranged main bar 2. The bending diameter of the hook 35 is not less than 2.5 times the diameter of the main bar 2, and the straight section length is not less than 3 times the hook diameter.

[0063] Therefore, according to the present invention, a construction device for casting steel-concrete composite beams is provided. By setting an extension end 35 extending towards the cantilever end 4 on the inverted suspension system 3, the inverted suspension system 3 forms a suspension effect on the panel system 6 within the cantilever end 4. One end of the tie rod 34 is welded to the extension end 35, and the other end is hooked by the longitudinally arranged main reinforcement 2 through the hook 35 to form a supporting skeleton within the cantilever end 4. After the concrete is poured, the part of the inverted suspension system 3 embedded within the cantilever end 4 serves as a skeleton structure within the cantilever end 4, forming part of the steel-concrete composite beam, thereby increasing the structural strength and toughness of the cantilever end 4.

[0064] According to one embodiment of the present invention, the panel system 6 includes a template 61 for pouring the bottom, and a tie system 5 for fixing the template 61 and adjusting the hanging height of the template 61.

[0065] In other words, such as Figure 1 , Figure 5 As shown, the panel system 6 includes a template 61 for pouring the bottom layer. To reduce the weight of the entire panel system 6 and to save costs, the template 61 is preferably made of wood with a thickness of 15mm. The tie system 5 fixes the template 61 and can adjust the hanging height of the template 61. The gaps between adjacent templates 61 are sealed with sponge tape or transparent tape, or other materials, to prevent grout leakage during subsequent concrete pouring.

[0066] According to one embodiment of the present invention, the panel system 6 further includes a skeleton grid 62, which is disposed at the bottom of the template 61.

[0067] Furthermore, the skeleton grid 62 is composed of square timbers 63, which are interwoven.

[0068] In other words, such as Figure 1 , Figure 5 As shown, the panel system 6 also includes a framework grid 62, which is composed of square timbers 63 arranged in a crisscross pattern. Specifically, the bottom of the horizontal square timbers 63 is connected to the tie rod system 5, and the horizontal square timbers 63 are spaced approximately 0.4 meters apart. After the horizontal square timbers 63 are arranged, the vertical square timbers 63 are arranged, with a spacing of approximately 0.4 meters between them, and are placed on top of the horizontal square timbers 63. The vertical square timbers 63 are connected to the bottom of the template 61. The framework grid 62 provides overall support for the template 61.

[0069] In some specific embodiments of this utility model, the tensioning system 5 includes a screw 51, a butterfly buckle bracket 52, and a steel pipe 53. The screw 51 is vertically arranged, and the two butterfly buckle brackets 52 are arranged opposite each other at the upper and lower ends of the screw 51. One end of the screw 51 is connected to the anti-hanging system 3 through the butterfly buckle bracket 52, and the other end of the screw 51 is connected to the two steel pipes 53 through the butterfly buckle bracket 52.

[0070] In other words, such as Figure 5 , Figure 6 As shown, the tie rod system 5 consists of a screw rod 51, a butterfly buckle bracket 52, and a steel pipe 53. The screw rod 51 is vertically arranged, with a butterfly buckle bracket 52 at both its upper and lower ends. The upper end of the screw rod 51 is supported on the anti-suspension system 3 via the butterfly buckle bracket 52, and the lower end is connected to two steel pipes 53 via the butterfly buckle bracket 52. The steel pipes 53 are arranged horizontally and longitudinally. Multiple butterfly buckle brackets 52 at the lower end of the tie rod system 5 in the same column form a linear fulcrum, fixing the horizontally arranged steel pipes 53. Multiple tie rod systems 5 on the same anti-suspension system 3 are spaced 0.6 meters apart, and multiple tie rod systems 5 on the extended end 35 inside the cantilever end 4 are spaced 0.4 meters apart.

[0071] Furthermore, the butterfly buckle 52 can move axially relative to the screw 51, and the bottom of the skeleton grid 62 is fixed by the steel pipe 53.

[0072] In other words, such as Figure 5 , Figure 6 As shown, steel pipe 53 is set horizontally and longitudinally, and horizontally arranged square timber 63 is placed on it. Vertically arranged square timber 63 is placed on the horizontally arranged square timber 63. The steel pipe 53 fixes the skeleton grid 62 and can be raised and lowered by adjusting the butterfly buckle frame 52, thereby controlling the height of the template 61.

[0073] Therefore, according to the present invention, a construction device for casting steel-concrete composite beams uses transverse and longitudinal square timbers 63 to form a skeleton grid 62 to provide comprehensive support for the formwork 61. Both the formwork 61 and the skeleton grid 62 are made of wood, which can reduce the weight of the entire system. The support and adjustment of the steel pipes 53 by the butterfly buckle frame 52 supports the skeleton grid 62, thereby making the stress points of the formwork 61 uniform, eliminating the need for longitudinal support, and saving construction materials.

[0074] In some specific embodiments of this utility model, the transverse support 31 is a double-segment structure arranged at intervals along the longitudinal direction of the steel box girder 1.

[0075] In other words, such as Figures 8 to 12 As shown, the transverse support 31 adopts a double-slot structure with double channel steel. The crossbeam 32 and the support leg 33 are welded together, and the net spacing between the double channel steels is 20mm. The bolt 51 of the tie system 5 passes through it, and the upper butterfly buckle bracket 52 is fastened to the double channel steel.

[0076] Therefore, the transverse support 31 using a double-channel steel structure is simple to process, requiring no additional machining of the through holes for the bolts 51, while simultaneously meeting the reverse lifting strength requirements and ensuring construction safety. When the bridge is wide, setting the reverse lifting system 3 in multiple rows can effectively reduce the weight of a single reverse lifting system 3, reduce the use of lifting equipment, and lower costs.

[0077] For example, such as Figure 7 As shown, in some specific embodiments of this utility model, the crossbeam 32 is 2.5 meters long, the extended end 35 is 0.85 meters long, and the support leg 33 is 0.5 meters long. After being divided, processed, and assembled into a transverse support 31 according to the above dimensions, the total weight of the transverse support 31 including the extended end 35 is 78.5 kg, and the total weight of the transverse support 31 without the extended end 35 is 62.8 kg. The overall weight is within the range of manual handling capacity, and manual handling can be selected according to the site conditions. However, if... Figure 7 If the two reverse lifting systems are designed as a single reverse lifting system, the total weight will exceed 100Kg, which is beyond the load-bearing capacity of manual handling. Therefore, it is necessary to use lifting equipment in conjunction with manual installation.

[0078] The detailed working process of this utility model is as follows:

[0079] First, the prefabricated steel box girder 1 is transported to the construction site. According to the construction requirements, the steel box girder 1 is arranged as required. Transverse connecting beams 11 are used to weld between adjacent steel box girders 1, and finally the assembly of the steel box girder 1 is completed.

[0080] Next, the crossbeam 32, legs 33 and protruding ends 35 are processed and cut according to the design drawings, and the assembly of the transverse support 31 is completed on site by welding; the steel box girder 1 or the transverse connecting beam 11 is measured and positioned, and fixed points are marked according to the design spacing; the transverse support 31 is welded to the steel box girder 1 according to the marked positions.

[0081] Then, the double channel steel connection and fixing of the tie system 5 is fixed by the horizontal support 31: the screw 51 is passed through the gap of the double channel steel for vertical installation, the top is set with the butterfly buckle 52 on the top surface of the channel steel, the bottom is installed with the butterfly buckle 52, and the steel pipes 53 are placed on both sides of the butterfly buckle 52.

[0082] Subsequently, after the steel pipes 53 are installed, the framework grid 62 is installed: first, the horizontal square timbers 63 are placed on the steel pipes 53 and fixed. Then, the vertical square timbers 63 are placed on top of the horizontal square timbers 63. After the vertical square timbers 63 are completed, templates 61 are laid on top of them, preferably 15mm thick wooden boards. The wooden boards are fixed to the square timbers 63 with nails. At the joints of the templates 61, sponge tape or transparent adhesive is used for sealing; other materials can also be used to seal the gaps to prevent grout leakage during subsequent concrete pouring.

[0083] Next, according to the specifications and drawings, the steel bars (main bars 2) are cut and fabricated. The steel bars are tied in the area to be poured as required. Tie bars 34 are set in the cantilever end 4. The hooks 36 of the tie bars 34 are used to hook the main bars 2 set in the lower longitudinal layer.

[0084] Next, the first pouring will be carried out: (as follows) Figure 13 , Figure 14 As shown, concrete is first poured at the cantilever end 4. The first pouring area 8 mainly involves the cantilever end 4. During pouring, attention should be paid to the pre-reservation of tie rods 34, drainage holes and pre-reserved parts.

[0085] Then, after the initial pouring, the inverted suspension system 3 is cut according to... Figure 14 The pouring cut surface 7 shown is cut to permanently integrate the inverted suspension system 3, which is poured into the concrete, into the steel-concrete composite beam.

[0086] Subsequently, a second pouring was carried out, and the second pouring area 9 mainly involves the areas other than the cantilever end 4.

[0087] Finally, remove panel system 6, tie system 5, and the remaining anti-suspension system 3.

[0088] The beneficial effects of this utility model are as follows: The inverted suspension system 3, extending along the width direction of the steel box girder 1, is connected to the panel system 6. The suspension height of the panel system 6 is adjusted via the tie system 5, eliminating the need for longitudinal support beams to meet casting requirements. The portion of the inverted suspension system 3 extending beyond the side of the steel box girder 1 forms a cantilever end 4. During casting of the cantilever end 4, a portion of the inverted suspension system 3 is embedded within the cantilever end 4, forming part of the steel-concrete composite beam. The inverted suspension system 3 embedded within the cantilever end 4 forms the skeleton structure within the cantilever end 4. By setting one or more rows of inverted suspension systems 3 along the width direction of the steel box girder 1, different width design requirements can be accommodated, reducing the weight of a single inverted suspension system 3. The construction device for casting steel-concrete composite beams of this utility model fixes the panel system 6 through the horizontally arranged anti-lifting system 3, eliminating the need for supporting longitudinal beams while still meeting construction requirements, greatly reducing construction budget, shortening construction cycle, and saving time and labor; by embedding a part of the anti-lifting system 3 in the cantilever end 4 to form part of the steel-concrete composite beam, it is equivalent to the skeleton structure in the cantilever end 4, increasing the structural strength and toughness of the cantilever end 4, making it safe and reliable; by setting one or more rows of anti-lifting systems 3, the weight of a single anti-lifting system 3 is reduced, reducing reliance on lifting equipment and lowering construction costs.

[0089] Of course, for those skilled in the art, other structures and working principles of the construction device used for casting steel-concrete composite beams are understandable and achievable, and will not be described in detail in this utility model.

[0090] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A construction device for casting steel-concrete composite beams, wherein the steel-concrete composite beams are formed by setting main reinforcement bars (2) on the top of a steel box girder (1) and then casting concrete, characterized in that, The construction device includes a reverse suspension system (3) extending along the width direction of the steel box girder (1). The bottom of the reverse suspension system (3) is connected to the steel box girder (1). At least one end of the reverse suspension system (3) extends out of one side of the steel box girder (1) to form a cantilever end (4) for pouring concrete. A tie system (5) is connected to the top of the reverse suspension system (3) and extends downward to adjust the suspension height of the panel system (6). The panel system (6) is connected to the bottom of the tie system (5). After the concrete is poured, a part of the reverse suspension system (3) is embedded in the cantilever end (4) to form part of the steel-concrete composite beam.

2. The construction device for casting steel-concrete composite beams according to claim 1, characterized in that, The anti-suspension system (3) includes a transverse support (31), which consists of a horizontally arranged crossbeam (32) and legs (33) arranged at both ends of the crossbeam (32) to support the crossbeam (32). The bottom of the two legs (33) is connected to the steel box girder (1).

3. The construction device for casting steel-concrete composite beams according to claim 2, characterized in that, The reverse suspension system (3) includes a tie rod (34) and an extension end (35). The extension end (35) is located at one end of the transverse support (31) and extends horizontally in the opposite direction. One end of the tie rod (34) is fixed by the extension end (35), and the other end of the tie rod (34) fixes the longitudinally arranged main bar (2).

4. The construction device for casting steel-concrete composite beams according to claim 3, characterized in that, The tie bar (34) hooks the longitudinally arranged main bar (2) through the hook (36).

5. A construction device for casting steel-concrete composite beams according to claim 4, characterized in that, The panel system (6) includes a template (61) for pouring the bottom, and the tie system (5) fixes the template (61) and can adjust the hanging height of the template (61).

6. A construction device for casting steel-concrete composite beams according to claim 5, characterized in that, The panel system (6) also includes a skeleton grid (62), which is disposed at the bottom of the template (61).

7. A construction device for casting steel-concrete composite beams according to claim 6, characterized in that, The skeleton grid (62) is composed of square timbers (63) that are crisscrossed.

8. A construction device for casting steel-concrete composite beams according to claim 7, characterized in that, The tie system (5) includes a screw (51), a butterfly buckle bracket (52), and a steel pipe (53). The screw (51) is vertically arranged, and the two butterfly buckle brackets (52) are arranged opposite each other at the upper and lower ends of the screw (51). One end of the screw (51) is connected to the anti-hanging system (3) through the butterfly buckle bracket (52), and the other end of the screw (51) is connected to the two steel pipes (53) through the butterfly buckle bracket (52).

9. A construction device for casting steel-concrete composite beams according to claim 8, characterized in that, The butterfly buckle frame (52) can move axially relative to the screw (51), and the bottom of the skeleton grid (62) is fixed by the steel pipe (53).

10. A construction device for casting steel-concrete composite beams according to claim 9, characterized in that, The transverse support (31) is a double-span structure arranged longitudinally along the steel box girder (1).

Images