Construction device for cast-in-situ joint of segmental prefabricated cover beam

Abstract

The utility model discloses a construction device for a cast-in-place joint of a segmental prefabricated cover beam, which comprises adjacent cover beam prefabricated segments, the construction device is positioned at the joint of the adjacent cover beam prefabricated segments, and the construction device comprises a construction platform and a hanging assembly for hanging the construction platform at the joint, the hanging assembly is hung on the cover beam prefabricated segment, and the construction platform comprises a cast-in-place concrete bearing platform located below the joint and a constructor operation platform located on the longitudinal bridge direction side face of the joint. The construction device for the cast-in-place joint of the segment prefabricated cover beam is easy to manufacture, low in manufacturing cost, low in requirements for the appearance and the size of a steel rod piece, high in adaptability, free of damage to a bridge body, capable of being recycled, easy to install, hoist, move and store, high in construction efficiency and low in construction cost, does not occupy the space below the bridge cover beam, and can be widely applied to construction of the cast-in-place joint of the segment prefabricated cover beam. And the influence on normal travel of people is small.

Description

Technical Field

[0001] The utility model belongs to the field of bridges, and in particular relates to a construction device for a cap beam. Background Art

[0002] Small and medium-span bridges account for over 75% of all bridges, and most small and medium-span bridges are beam bridges, of which simply supported beam bridges and continuous beam bridges account for the largest proportion. For multi-span simply supported beam bridges or continuous beam bridges with multiple main beams, a cap beam is required to transfer the weight of the superstructure and vehicle loads during the operational phase to the bridge piers. Bridge cap beams are mostly prestressed concrete structures, especially for wide multi-girder bridges. The cap beams need to be adapted to the width of the bridge superstructure (i.e., the main beams), so the cap beams have very long cantilevers. The stiffness and bearing capacity of long cantilever cap beams face great challenges, and the use of prestressing is an effective measure to improve the stiffness and bearing capacity of long cantilever cap beams.

[0003] Due to the heavy weight of prestressed concrete cap beams, the overall prefabrication and hoisting construction method is rarely used. Large cantilever prestressed cap beams are generally constructed using cast-in-place brackets or segment assembly. For large cantilever concrete cap beams that use segment assembly construction methods, the joints between prefabricated segments need to be cast. Currently, most methods use brackets erected from the ground, or Bailey frames supported on the piers, to form a construction platform for cast-in-place joints. The construction method of erecting brackets on the ground is cumbersome, has a long construction period, and increases construction costs. For high-pier bridges, this construction method is more expensive and risky. The construction method using Bailey frames requires many rods, and the piers need to have pre-embedded connectors or later drilling holes, which will cause certain damage to the piers. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology and provide a construction device for cast-in-situ joints of segmental prefabricated cap beams which is simple to manufacture, has a short construction period and low cost.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0006] A construction device for cast-in-situ joints of segmental prefabricated cap beams, comprising adjacent prefabricated cap beam segments. The construction device is located at the joints of adjacent prefabricated cap beam segments. The construction device includes a construction platform and a suspension assembly for hanging the construction platform at the joints. The suspension assembly is hung on the prefabricated cap beam segments. The construction platform includes a cast-in-situ concrete bearing platform located below the joint and a construction personnel work platform located on the longitudinal bridge side of the joint.

[0007] In the above-mentioned construction device, preferably, the suspension assembly includes a column truss and a top transverse truss, and a pair of the column trusses and the top transverse truss are provided at a prefabricated cap beam segment, and the top transverse truss is located above the prefabricated cap beam segment, and the pair of the column trusses are respectively located on both sides of the longitudinal bridge direction of the prefabricated cap beam segment and are connected through the top transverse truss.

[0008] In the above-mentioned construction device, preferably, the column truss includes a vertical rod, and the upper and lower sides of the vertical rod are respectively provided with an upper opening for the top transverse truss to pass through and a lower opening for connecting with the construction platform, and the top transverse truss is arranged in the upper openings of a pair of adjacent vertical rods in the longitudinal bridge direction.

[0009] In the above-mentioned construction device, preferably, the vertical rods are respectively provided with upper reinforcing plates and lower reinforcing plates at the upper openings and the lower openings, and transverse support rods are provided between the adjacent vertical rods in the transverse bridge direction. The reinforcing plates increase the rigidity of the vertical rods to prevent deformation of the vertical rods. The transverse support rods provide transverse rigidity for the vertical rods to prevent the column trusses from deforming inward under the action of the lifting rope during the lifting process of the construction device, thereby ensuring the quality of the construction device.

[0010] In the above-mentioned construction device, preferably, the vertical rod is provided with an escalator for construction workers to access the construction platform from the prefabricated section of the cap beam, and the top of the vertical rod is provided with a lifting point to facilitate the lifting equipment to lift the construction device to the designated position.

[0011] In the above-mentioned construction device, preferably, the top transverse truss is a split structure, including a pair of top cross beams, and a pair of adjacent top cross beams are connected by a splicing assembly, which is convenient for construction workers to install and disassemble while standing on the prefabricated segment of the cap beam, so that the construction device can be recycled many times.

[0012] In the above-mentioned construction device, preferably, the top crossbeam is an I-beam, and the splicing assembly includes an upper flange splicing plate, a lower flange splicing plate, a web splicing plate and bolts. The adjacent ends of the I-beam are provided with holes, the upper flange splicing plates are arranged on the upper side of the upper flanges of a pair of the I-beams, the lower flange splicing plates are arranged on the lower side of the upper flanges of a pair of the I-beams, and the web splicing plates are arranged on both sides of the web of the I-beam. The upper flange splicing plates, the lower flange splicing plates and the web splicing plates are fixed to the adjacent I-beams into a whole by bolts.

[0013] In the above-mentioned construction device, preferably, the construction platform includes a bottom beam and is connected to the suspension assembly through the bottom beam, the concrete bearing platform is located in the middle of the bottom beam, and the construction personnel work platform is located on both sides of the bottom beam.

[0014] In the above-mentioned construction device, preferably, a pair of bottom crossbeams are provided, arranged along the longitudinal bridge direction, a plurality of bottom longitudinal beams arranged in the transverse bridge direction are fixed between the middle parts of the pair of bottom crossbeams, a bottom auxiliary crossbeam arranged in the longitudinal bridge direction is fixed between the plurality of bottom longitudinal beams, the bottom crossbeams, the bottom longitudinal beams and the bottom auxiliary crossbeams are arranged at the same height, a plurality of reinforcing longitudinal beams arranged in the transverse bridge direction are fixed between the longitudinal sides of the pair of bottom crossbeams, and the reinforcing longitudinal beams are located at the bottom of the bottom crossbeams. The bottom crossbeams and the bottom longitudinal beams are the main components that bear the weight of the joint concrete. The structure must have sufficient rigidity to prevent the casting quality of the cast-in-place joint from failing to meet the design requirements due to deformation of the construction platform. In addition, the bottom auxiliary crossbeams also form an integral frame together with the bottom crossbeams and the bottom longitudinal beams, which can more reliably and evenly share the weight of the cast-in-place joint concrete. The reinforcing longitudinal beams between the longitudinal sides of the bottom crossbeams provide sufficient construction space for construction personnel, facilitating the work of steel bar binding and formwork support of the cast-in-place joint of the cap beam.

[0015] In the above-mentioned construction device, preferably, the concrete bearing platform is provided with a bottom steel plate located on the bottom cross beam, the construction personnel working platform is provided with a bottom steel plate located on the stiffening longitudinal beam, and the side of the construction personnel working platform is provided with a fence to provide convenience for the staff to walk, and some small tools can also be placed, while ensuring the safety of the construction personnel.

[0016] In the above-mentioned construction device, preferably, the fence includes fence posts, and the fence posts are provided with fence horizontal rods or fence steel plates along the height direction. The fence steel plates can not only ensure the safety of construction workers but also prevent objects from falling to a great extent.

[0017] In the above-mentioned construction device, preferably, the inner width and height formed by the column truss, the top transverse truss and the bottom cross beam are respectively larger than the width and height of the cross-section of the cast-in-place joint of the prefabricated segment of the cap beam, and the length of the transverse support rod of the column truss is 10-100 cm longer than the width of the cast-in-place joint to ensure that the construction device can be smoothly hung at the prefabricated segment of the cap beam and leave space for the side formwork support of the cast-in-place joint of the cap beam.

[0018] In the above-mentioned construction device, preferably, the length of the fence posts should be 100-200 cm, that is, higher than the body center of gravity of an average adult, so as to ensure the safety of the construction workers.

[0019] In the above-mentioned construction device, preferably, the top crossbeam preferably adopts an open-section welded I-beam or hot-rolled H-shaped steel, which is convenient for connection with bolts, and the construction device is easy to dismantle after the joint construction is completed. The vertical rods, bottom crossbeams, bottom longitudinal beams, bottom auxiliary crossbeams, fence posts, and stiffening longitudinal beams are all steel rods. Each rod can be a square hollow steel rod, a welded I-beam, a welded L-shaped steel beam, hot-rolled H-shaped steel, hot-rolled L-shaped steel, hot-rolled angle steel or cold-bent angle steel, etc. The connection method between the above-mentioned rods can be welding or bolt connection.

[0020] The assembling method of the above-mentioned construction device may include the following steps:

[0021] S1: Purchase steel rods, steel plates and bolts of appropriate sizes, and cut the steel rods and steel plates into the designed sizes;

[0022] S2: Make the suspension assembly and construction platform. The top crossbeam of the suspension assembly is not connected. Prepare the rods, steel plates and bolts required for the top transverse truss on the top of the cap beam.

[0023] S3: Use hoisting equipment to hoist the prepared suspension components and construction platform to the designated location, then pass the top crossbeam of the top transverse truss through the upper opening of the column truss, and then use the flange upper splicing plate, flange lower splicing plate, web splicing plate and bolts to connect the adjacent top crossbeams;

[0024] S4: After the top transverse truss is assembled, slowly remove the lifting rope of the lifting equipment and move the lifting equipment away.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] 1. The construction device for cast-in-situ joints of segmental prefabricated cap beams of the utility model is simple to manufacture and has low production cost. On-site construction units can manufacture it according to the size of the bridge cap beam, without the need for special steel structure processing plants for processing. It has low requirements on the shape and size of steel rods, and can be selected in a variety of ways. It has strong adaptability and does not require damage to the bridge body. At the same time, it can be recycled between multiple cap beams.

[0027] 2. The construction device of the utility model for cast-in-situ joints of segmental prefabricated cap beams is easy to install, hoist, move and store, and has high construction efficiency. It does not require the erection of supports at the construction site as in traditional solutions, thereby greatly improving the construction efficiency of bridge cap beam joints, shortening the construction period, and reducing construction costs.

[0028] 3. The construction device of the utility model for cast-in-situ joints of segmental prefabricated cap beams adopts a hanging method, which does not occupy the space under the bridge cap beam at all. Especially for newly built elevated bridges in cities, it will not interrupt the traffic on the existing routes under the bridge, greatly reducing the impact on people's normal travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 1.

[0031] Figure 2 This is a schematic diagram of the overall structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 1 (including bridge cap beams).

[0032] Figure 3 for Figure 2 Partial detail drawing.

[0033] Figure 4 This is a schematic diagram of the column truss structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 1.

[0034] Figure 5 This is a detailed view of the top transverse truss connection of the construction device for cast-in-place joints of segmental precast cap beams in Example 1.

[0035] Figure 6 Schematic diagram of the overall structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 1 (bottom-up axonometric view).

[0036] Figure 7 for Figure 1 Front view of .

[0037] Figure 8 for Figure 1 Right view of .

[0038] Figure 9 This is a schematic diagram of the overall structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 2.

[0039] Figure 10 This is a schematic diagram of the overall structure of the construction device for cast-in-situ joints of segmental prefabricated cap beams in Example 3.

[0040] Legend

[0041] 1. Column truss; 101. Vertical rod; 102. Upper reinforcement plate; 103. Lower reinforcement plate; 104. Upper opening; 105. Lower opening; 106. Escalator; 107. Lifting point; 108. Horizontal support rod; 2. Top horizontal truss; 201. Top crossbeam; 202. Upper flange splicing plate; 203. Lower flange splicing plate; 204. Web splicing plate; 205. Bolt; 3. Bottom crossbeam; 4. Bottom longitudinal beam; 5. Bottom auxiliary crossbeam; 6. Stiffening longitudinal beam; 7. Fence column; 8. Fence horizontal rod; 9. Bottom steel plate; 10. Cap beam precast segment; 11. Fence steel plate. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0043] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0044] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0045] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0046] Example 1:

[0047] like Figures 1-8 As shown, the construction device for cast-in-situ joints of segmental prefabricated cap beams of this embodiment includes adjacent prefabricated cap beam segments 10. The construction device is located at the joints of adjacent prefabricated cap beam segments 10. The construction device includes a construction platform and a suspension component for hanging the construction platform at the joints. The suspension component is hung on the prefabricated cap beam segment 10. The construction platform includes a cast-in-situ concrete bearing platform located below the joint and a construction personnel working platform located on the longitudinal side of the joint.

[0048] like Figure 2 and 3As shown, in this embodiment, the suspension assembly includes a column truss 1 and a top transverse truss 2. A pair of column trusses 1 and a top transverse truss 2 are provided at a cap beam prefabricated segment 10. The top transverse truss 2 is located above the cap beam prefabricated segment 10. The pair of column trusses 1 are respectively located on both sides of the longitudinal bridge of the cap beam prefabricated segment 10 and are connected through the top transverse truss 2.

[0049] like Figure 4 As shown, in this embodiment, the column truss 1 includes a vertical rod 101, an upper reinforcing plate 102, a lower reinforcing plate 103, an escalator 106, a hanging point 107 and a transverse support rod 108. The upper reinforcing plate 102 and the lower reinforcing plate 103 are respectively fixed to the upper and lower sides of the vertical rod 101. The vertical rod 101, the upper reinforcing plate 102 and the lower reinforcing plate 103 are provided with an upper opening 104 and a lower opening 105. The size of the upper opening 104 and the lower opening 105 is slightly larger than the cross-section of the top transverse truss 2, so as to leave a tolerance to ensure that the top transverse truss 2 can smoothly pass through the upper opening 1 provided on the column truss 1. 04. The lifting point 107 and the transverse support rod 108 are fixed to the upper position of the vertical rod 101. The lifting point 107 is used to facilitate the lifting equipment to lift the construction device to the specified position, and the transverse support rod 108 is used to provide transverse rigidity for the column truss 1 to prevent the column truss 1 from deforming inward under the action of the lifting rope during the lifting process of the construction device, thereby ensuring the quality of the construction device. The escalator 106 is evenly fixed vertically to the side of the vertical rod 101, which can provide a foothold for construction personnel to enter and exit the construction device from the top surface of the cap beam prefabricated segment 10, making it more convenient and safer for construction personnel to enter and exit the construction device.

[0050] like Figure 5As shown, in this embodiment, the top transverse truss 2 includes a top crossbeam 201, an upper flange splicing plate 202, a lower flange splicing plate 203, a web splicing plate 204 and a bolt 205. A hole is provided at one end of the top crossbeam 201 for connecting adjacent top crossbeams 201. The side of the top crossbeam 201 with the hole is close and a gap is left; the upper flange splicing plate 202 is arranged on the upper side of the flange of the top crossbeam 201, and the lower flange splicing plate 203 is arranged on the lower side of the flange of the top crossbeam 201. Due to the existence of the web of the top crossbeam 201, the lower flange splicing plate 204 is provided on the lower side of the flange of the top crossbeam 201. There are two plates 203 on the underside of the flange of the top crossbeam 201, one on each side of the web; web splicing plates 204 are arranged on both sides of the web of the top crossbeam 201. The upper flange splicing plates 202, the lower flange splicing plates 203, the web splicing plates 204, and bolts 205 are used to fix the adjacent top crossbeams 201 to form a whole. The top crossbeam 201 passes through the upper openings 104 provided in the vertical rods 101 and the upper reinforcement plate 102 and is simply fixed, not completely fixed, to facilitate the disassembly of the construction device after the joints of the precast cap beam segment 10 are cast. The length of the overhang of the top crossbeam 201 is 20-50 cm, leaving space for temporary fixation of the top crossbeam 201 to the column truss 1.

[0051] like Figure 1 、 Figure 6-Figure 8 As shown, in this embodiment, the construction platform includes a bottom cross beam 3, a bottom longitudinal beam 4, a bottom auxiliary cross beam 5, a stiffening longitudinal beam 6, a fence post 7, a fence horizontal rod 8, and a bottom steel plate 9. The bottom cross beam 3 passes through the lower opening 105 provided on the vertical rod 101 and the lower reinforcing plate 103, and is fixed to ensure that the construction platform is reliably suspended on the column truss 1. The weight of the construction platform and subsequent loads are transmitted to the vertical rod 101 through the bottom cross beam 3, and finally to the top transverse truss 2 of the suspension assembly.

[0052] like Figure 1 、 Figure 6-Figure 8 As shown, in this embodiment, the bottom longitudinal beams 4 and the bottom auxiliary cross beams 5 are at the same height as the bottom cross beams 3 and are fixedly connected at the point where the flanges and webs meet. The bottom auxiliary cross beams 5 are fixed between the bottom longitudinal beams 4. Because the bottom cross beams 3 and the bottom longitudinal beams 4 are the primary components bearing the weight of the joint concrete, they must have sufficient rigidity to prevent the casting quality of the cast-in-place joint from failing to meet design requirements due to deformation of the construction platform. In addition, the bottom auxiliary cross beams 5, together with the bottom cross beams 3 and the bottom longitudinal beams 4, form an integral framework, more reliably and evenly sharing the weight of the cast-in-place joint concrete.

[0053] like Figure 1 、 Figure 6-Figure 8As shown, in this embodiment, the reinforcing longitudinal beams 6 are evenly arranged in the transverse direction of the bridge and fixedly connected to the bottom of the bottom beam 3, providing sufficient construction space for construction personnel and facilitating the work such as steel bar binding and formwork support of the cast-in-place joints of the prefabricated cap beam segments 10. Fence columns 7 are fixedly connected above the reinforcing longitudinal beams 6, and fence horizontal rods 8 are arranged along the height direction of the fence columns 7. The fence formed by the fence columns 7 and the fence horizontal rods 8 provides safety for the construction personnel.

[0054] like Figure 1 、 Figure 6-Figure 8 As shown, in this embodiment, a bottom steel plate 9 is provided above the bottom longitudinal beam 4 and the stiffening longitudinal beam 6. The bottom steel plate 9 provides convenience for workers to walk and can also be used to place some small tools.

[0055] like Figure 1 、 Figure 6-Figure 8 As shown, in this embodiment, the inner width and height formed by the column truss 1, the top transverse truss 2 and the bottom crossbeam 3 are respectively slightly larger than the width and height of the cast-in-place joint section of the precast cap beam segment 10, to ensure that the construction device can be smoothly hung on the precast cap beam segment 10. The length of the transverse support rod 108 of the column truss 1, that is, the inner clear distance of the vertical rod 101, is 10-100 cm longer than the length of the cast-in-place joint, leaving space for the side formwork support of the cast-in-place joint of the precast cap beam segment 10.

[0056] like Figure 1 、 Figure 6-Figure 8 As shown, in this embodiment, the top crossbeam 201, the vertical rod 101, the bottom crossbeam 3, the bottom longitudinal beam 4, the bottom auxiliary crossbeam 5, and the stiffening longitudinal beam 6 are all hot-rolled H-shaped steels, which do not require welding and have low cost. The fence posts 7 are made of square steel pipes, and the length of the fence posts 7 should be 100-200cm, that is, higher than the body center of gravity of an average adult, to ensure the safety of construction workers.

[0057] Traditional construction devices for cast-in-place joints of prefabricated cap beam segments 10 often use full-frame or Bailey frames, which are inconvenient to construct, require numerous rods, and have a long production cycle. In this embodiment, the column trusses 1 and the construction platform are both welded from H-shaped steel, which is simple to manufacture, lightweight, has a short production cycle, and is low in cost. Furthermore, the top transverse trusses 2 are spliced together with bolts 205, making them easy to install and disassemble and reusable multiple times.

[0058] Example 2:

[0059] like Figure 9 As shown, the construction device for cast-in-situ joints of segmental prefabricated cap beams in this embodiment is basically the same as that in Example 1. The main difference is that, in this embodiment, the vertical rods 101 in the column truss 1 are made of square steel tubes, which have greater axial stiffness and better overall stability.

[0060] Example 3:

[0061] like Figure 10 As shown, the construction device for cast-in-situ joints of segmental prefabricated cap beams in this embodiment is basically the same as that in Example 2. The main difference is that, in this embodiment, the fence horizontal rods 8 are replaced by fence steel plates 11, which can not only ensure the safety of construction workers but also prevent objects from falling to a great extent.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A construction device for cast-in-situ joints of segmental prefabricated cap beams, comprising adjacent prefabricated cap beam segments (10), characterized in that: The construction device is located at the joint of adjacent cap beam precast segments (10), and the construction device includes a construction platform and a suspension component for hanging the construction platform at the joint, the suspension component is hung on the cap beam precast segment (10), and the construction platform includes a cast-in-place concrete bearing platform located below the joint and a construction personnel working platform located on the longitudinal bridge side of the joint.

2. The construction device according to claim 1, characterized in that: The suspension assembly includes a column truss (1) and a top transverse truss (2), and a pair of the column trusses (1) and the top transverse truss (2) are provided at a cap beam prefabricated segment (10), and the top transverse truss (2) is located above the cap beam prefabricated segment (10). The pair of column trusses (1) are respectively located on both sides of the longitudinal bridge direction of the cap beam prefabricated segment (10) and are connected through the top transverse truss (2).

3. The construction device according to claim 2, characterized in that: The column truss (1) includes a vertical rod (101), and the upper and lower sides of the vertical rod (101) are respectively provided with an upper opening (104) for the top transverse truss (2) to pass through and a lower opening (105) for connecting to the construction platform. The top transverse truss (2) is arranged in the upper openings (104) of a pair of adjacent vertical rods (101) in the longitudinal bridge direction.

4. The construction device according to claim 3, characterized in that: The vertical rods (101) are provided with an upper reinforcing plate (102) and a lower reinforcing plate (103) at the upper opening (104) and the lower opening (105), respectively, and a transverse supporting rod (108) is provided between adjacent vertical rods (101) in a transverse bridge direction.

5. The construction device according to claim 3, characterized in that: The vertical rod (101) is provided with an escalator (106) for construction workers to access the construction platform from the cap beam prefabricated segment (10), and a hanging point (107) is provided at the top of the vertical rod (101).

6. The construction device according to claim 2, characterized in that: The top transverse truss (2) is a split structure, comprising a pair of top crossbeams (201), wherein a pair of adjacent top crossbeams (201) are connected via a splicing assembly.

7. The construction device according to claim 6, characterized in that: The top crossbeam (201) is an I-beam, and the splicing assembly includes an upper flange splicing plate (202), a lower flange splicing plate (203), a web splicing plate (204) and bolts (205). Adjacent ends of the I-beam are provided with holes. The upper flange splicing plate (202) is arranged on the upper side of the upper flanges of a pair of the I-beams, the lower flange splicing plate (203) is arranged on the lower side of the upper flanges of a pair of the I-beams, and the web splicing plate (204) is arranged on both sides of the web of the I-beam. The upper flange splicing plate (202), the lower flange splicing plate (203) and the web splicing plate (204) are fixedly connected to adjacent I-beams into a whole by bolts (205).

8. The construction device according to any one of claims 1 to 7, characterized in that: The construction platform comprises a bottom crossbeam (3) and is connected to the suspension assembly via the bottom crossbeam (3); the concrete bearing platform is located in the middle of the bottom crossbeam (3); and the construction personnel working platform is located on both sides of the bottom crossbeam (3).

9. The construction device according to claim 8, characterized in that: A pair of bottom cross beams (3) are provided, which are arranged along the longitudinal bridge direction; a plurality of bottom longitudinal beams (4) arranged in the transverse bridge direction are fixedly provided between the middle parts of the pair of bottom cross beams (3); a bottom auxiliary cross beam (5) arranged in the longitudinal bridge direction is fixedly provided between the plurality of bottom longitudinal beams (4); the bottom cross beams (3), the bottom longitudinal beams (4) and the bottom auxiliary cross beams (5) are arranged at the same height; a plurality of reinforcing longitudinal beams (6) arranged along the transverse bridge direction are fixedly provided between both sides of the longitudinal bridge direction of the pair of bottom cross beams (3); the reinforcing longitudinal beams (6) are located at the bottom of the bottom cross beam (3).

10. The construction device according to claim 9, characterized in that: The concrete bearing platform is provided with a bottom steel plate (9) located on the bottom cross beam (3), the construction personnel working platform is provided with a bottom steel plate (9) located on the stiffening longitudinal beam (6), and a fence is provided on the side of the construction personnel working platform.

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