A prefabricated bridge deck structure and installation method

Abstract

The present invention discloses an assembled bridge deck structure and an installation method. The structure comprises a bridge deck, a composite steel beam and a dismantling module. The bridge deck comprises a concrete slab, bolts and a spliced ​​steel plate. The bolts are vertically welded and fixed to the spliced ​​steel plate. The bolts and the spliced ​​steel plate are pre-buried in the precast concrete slab. A first flange plate and a second flange plate are horizontally fixed on the top of the composite steel beam. Both of them are provided with bolting holes, which correspond to the bolting holes provided on the spliced ​​steel plate. The first flange plate and the second flange plate are respectively fixedly connected to the two spliced ​​steel plates with bolts through the bolting holes. The bridge deck can be dismantled by releasing the bolts. The dismantling module comprises a hydraulic cylinder and a hydraulic pump. The hydraulic pump transmits power to the hydraulic cylinder. The movable end of the hydraulic cylinder passes through the reserved through hole on the second flange plate and abuts against the bottom of the spliced ​​steel plate. The bolts are released to drive the hydraulic cylinder to lift the bridge deck, thereby solving the problem that it is difficult to realize on-site rapid zoning maintenance and dismantle the bridge deck.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and more specifically, to an assembled bridge deck structure and an installation method. Background Art

[0002] The steel-concrete composite beam is a load-bearing member composed of a steel beam and a concrete bridge deck. This structural form makes full use of the compressive properties of concrete materials and the tensile properties of steel. It is one of the mainstream bridge types in the domestic and international highway and municipal bridge markets. With the rapid economic development and the advancement of industrialization, prefabrication and assembly technology has been more widely used in the process of bridge industrialization. While ensuring the quality of bridge products, it greatly shortens the construction time of bridges. Different from the traditional concrete beam prefabrication and assembly technology, the rapid construction technology of box-type composite beam bridges has a better industrialization foundation and industrialization potential, is more environmentally friendly, and is faster to construct. It better meets the requirements of "lightweight and large span", and requires a box-type composite beam technology that is easy to transport, replace and maintain.

[0003] The existing technology has the following disadvantages: (1) The box-type composite beam concrete bridge deck adopts on-site integral casting or partial concrete casting construction technology, which places high requirements on the casting site space and personnel and equipment, and the casting quality will also be affected by the on-site working environment; (2) The bridge needs to withstand wind loads, vehicle loads, etc., most of which are dynamic loads. These loads cannot be buffered and are likely to cause fatigue damage to the main structure over the years, resulting in inharmonious deformation between the bridge deck concrete slab and the steel box beam, which will affect the durability and bearing capacity of the structure and increase the burden on the later on-site maintenance of the composite beam structure. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an assembled bridge deck structure and an installation method. The structure includes a bridge deck, a composite steel beam, a demolition module, and a dehumidification module. The bridge deck includes a concrete slab, bolts, and a spliced ​​steel plate. The concrete slab is prefabricated in a factory. The bolts are vertically welded and fixed to the spliced ​​steel plate and are pre-buried in the concrete slab. The spliced ​​steel plate serves as the bottom plate of the bridge deck. The composite steel beam is provided with a first flange plate and a second flange plate, which are respectively located on both sides and the middle of the composite steel beam. By The connecting steel plates are respectively fixed to the first flange plate and the second flange plate by bolts to realize the division of the bridge deck in the transverse and longitudinal directions, reduce the size of the bridge deck, and reduce the difficulty of subsequent replacement and maintenance. The dismantling module and the dehumidification module are both arranged on the combined steel beam. The dismantling module adopts a hydraulic cylinder to abut the spliced ​​steel plate, and can directly lift the bridge deck for replacement. The dehumidification module covers the first flange plate, the second flange plate and the spliced ​​steel plate to realize timed dehumidification and prevent rust at the bolt connection parts, thus solving the problem of difficulty in realizing on-site rapid zoning maintenance and dismantling of the bridge deck.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, there is provided an assembled bridge deck structure, a bridge deck and a composite steel beam, and a dismantling module, wherein the dismantling module is fixed to the composite steel beam, the bridge deck comprises a concrete slab, bolts, and a spliced ​​steel plate, wherein the bolts are vertically welded and fixed to the spliced ​​steel plate, the bolts and the spliced ​​steel plate are pre-embedded in a precast concrete slab, the spliced ​​steel plate is fitted to the bottom surface of both sides of the precast concrete slab, and a first flange plate and a second flange plate are horizontally fixed to the top of the composite steel beam, wherein the first flange plate and the The second flange plate is provided with a bolting hole, which corresponds to the bolting hole provided on the spliced ​​steel plate. The first flange plate and the second flange plate are respectively fixedly connected with the spliced ​​steel plates on both sides of the bottom of the concrete slab by bolts through the bolting holes, and the bridge deck is dismantled by releasing the bolts. The dismantling module includes a hydraulic cylinder and a hydraulic pump, and the hydraulic pump transmits power to the hydraulic cylinder, and the movable end of the hydraulic cylinder passes through the reserved through hole on the second flange plate and abuts against the bottom of the spliced ​​steel plate. The bolts are released to drive the hydraulic cylinder to realize the function of lifting the bridge deck.

[0006] Furthermore, the first flange plate and the second flange plate are respectively arranged on both sides and the middle of the composite steel beam, and the bridge deck comprises a connecting steel plate, which is vertically welded and fixed to the spliced ​​steel plate at the center axis of the bridge, and the connecting steel plate and the spliced ​​steel plate form an L-shaped structure. The two bridge decks are separated by the two L-shaped structures at the connection point of the center axis of the bridge, and the two bridge decks are respectively bolted to the second flange plate in the middle of the composite steel beam.

[0007] Furthermore, the composite steel beam comprises a cross beam, a longitudinal beam and a box beam, the cross beam is fixed on the two box beams along the transverse direction of the bridge, the longitudinal beam passes through the cross beam along the longitudinal direction of the bridge, and the longitudinal beam and the cross beam are fixedly connected.

[0008] Furthermore, the dismantling module includes a cylinder support frame and a hydraulic oil pipe. The cylinder support frame is fixed to one side of the longitudinal beam, the hydraulic cylinder is fixed to the cylinder support frame, the hydraulic cylinder and the hydraulic pump are connected through the hydraulic oil pipe, and the hydraulic pump is fixed to the longitudinal beam.

[0009] Furthermore, it includes a dehumidification module, which is fixed on the combined steel beam and includes a protective cover and a dehumidifier. The protective cover is a retractable curtain-like structure, which is fixed on the longitudinal beam and the second flange plate. The dehumidifier is fixed on the longitudinal beam to dehumidify the area covered by the protective cover.

[0010] Furthermore, the dehumidification module includes a first fixed head and a second fixed head, the first fixed head and the second fixed head are respectively fixed on the longitudinal beam and the bottom of the second flange plate, the top and bottom of the protective cover are respectively detachably connected to the first fixed head and the second fixed head, and the protective cover covers the second flange plate and the bolting holes.

[0011] Furthermore, the dehumidification module includes a fan fixing frame, which is fixed to one side of the longitudinal beam and is used to fix and support the dehumidifier.

[0012] According to another aspect of the present invention, a method for installing a prefabricated bridge deck structure is provided, which is implemented by using the prefabricated bridge deck structure and includes the following steps:

[0013] S100, prefabricates concrete bridge decks and composite steel beams in factories, and transports them to the construction site in batches after prefabrication;

[0014] S200, on-site mechanical assembly of composite steel beams, after assembly, hoisting and erection to the designated construction location;

[0015] S300, hoisting and installing the concrete bridge deck to the designated location, applying adhesive to the surface of the connecting plate at the end of the concrete bridge deck before installation, and assembling and squeezing the adhesive during the installation process to achieve seamless adhesive connection of the concrete bridge deck;

[0016] S400, bolts are passed through the reserved bolting holes after assembly and alignment and tightened to complete the assembly of the concrete bridge deck and the composite steel beam, and the removal module and dehumidification module are installed.

[0017] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0018] 1. The present invention provides an assembled bridge deck structure, including a bridge deck, a composite steel beam, a dismantling module, and a dehumidification module. The bridge deck includes a concrete slab, bolts, and a spliced ​​steel plate. The concrete slab is prefabricated in a factory. The bolts are vertically welded and fixed to the spliced ​​steel plate and are pre-buried in the concrete slab. The spliced ​​steel plate serves as a bottom plate of the bridge deck. A first flange plate and a second flange plate are provided on the composite steel beam, which are respectively located at both sides and a middle of the composite steel beam. The spliced ​​steel plates at the bottom of both sides of the bridge deck are respectively bolted to the first flange plate and the second flange plate to achieve the segmentation of the bridge deck in the transverse and longitudinal directions, thereby reducing the size of the bridge deck and the difficulty of subsequent replacement and maintenance. The dismantling module and the dehumidification module are both arranged on the composite steel beam. The dismantling module adopts a hydraulic cylinder to abut the spliced ​​steel plate, and can directly lift the bridge deck for dismantling. The dehumidification module covers the first flange plate, the second flange plate and the spliced ​​steel plate to achieve timed dehumidification and prevent rust at the bolt connection parts, thereby solving the problem that it is difficult to achieve on-site rapid zoning maintenance and dismantle the bridge deck.

[0019] 2. The present invention provides an assembled bridge deck structure, wherein the dehumidification module comprises a first fixed head, a protective cover, a fan fixing frame, a dehumidifier, and a second fixed head. The first fixed head and the second fixed head are respectively fixed on the longitudinal beam and the bottom of the second flange plate. The protective cover is a curtain-like structure, which is detachably connected to the second fixed head and the first fixed head, respectively. The protective cover covers the mechanical bolts, the second flange plate, the bolting holes and other positions to prevent dust, debris and rainwater from entering, and protects the mechanical bolts, the second flange plate and the bolting holes. Dehumidification is performed within the coverage of the dehumidifier protective cover, thereby improving the anti-corrosion protection of the mechanical bolts, the second flange plate and the bolting holes and extending the service life.

[0020] 3. The present invention provides an assembled bridge deck structure, wherein a dismantling module comprises a hydraulic cylinder, a hydraulic oil pipe, and a hydraulic pump. The movable end of the hydraulic cylinder passes through the reserved through holes on the first flange plate and the second flange plate, and abuts against the bottom of the spliced ​​steel plate. The hydraulic cylinder and the hydraulic pump are connected through the hydraulic oil pipe, and the hydraulic pump is fixed on the longitudinal beam. When the bridge deck needs to be dismantled and replaced, the mechanical bolts are first removed, and the hydraulic pump is started. The power is transmitted to the movable end of the hydraulic cylinder through the hydraulic oil pipe. The movable end is lifted upward to lift the spliced ​​steel plate away from the second flange plate, thereby realizing the function of quickly replacing the bridge deck. The replacement can be completed without large-scale construction machinery, which reduces the phenomenon of rust and combination of the spliced ​​steel plate and the second flange plate under long-term use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of an assembled bridge deck structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a combined steel beam in an assembled bridge deck structure according to an embodiment of the present invention;

[0023] Figure 3 A cross-sectional view along the bridge direction of an assembled bridge deck structure according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the installation of a first flange plate in an assembled bridge deck structure according to an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the installation of bridge decks in the transverse and longitudinal directions of a prefabricated bridge deck structure according to an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a dehumidification module and a removal module in an assembled bridge deck structure according to an embodiment of the present invention;

[0027] Figure 7 The present invention is a flowchart of a method for installing a prefabricated bridge deck structure according to an embodiment of the present invention.

[0028] In all the drawings, the same figure numbers represent the same technical features, specifically: 100-bridge deck, 200-combined steel beam, 300-mechanical bolts, 600-demolition module, 700-dehumidification module, 101-concrete slab, 102-bolts, 103-spliced ​​steel plate, 104-connecting steel plate, 210-cross beam, 220-longitudinal beam, 241-first flange plate, 242-second flange plate, 610-hydraulic cylinder, 620-cylinder support frame, 630-hydraulic oil pipe, 640-hydraulic pump, 701-first fixed head, 702-protective cover, 703-fan fixing frame, 704-dehumidifier, 705-second fixed head. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1-Figure 5As shown, the present invention provides an assembled bridge deck structure, including a bridge deck 100 and a composite steel beam 200, wherein the composite steel beam 200 is supported at the bottom of the bridge deck 100, wherein the bridge deck 100 includes a concrete slab 101, bolts 102, and a spliced ​​steel plate 103, the concrete slab 101 is prefabricated in a factory, the bolts 102 are vertically welded and fixed to the spliced ​​steel plate 103, when the concrete slab 101 is prefabricated, the bolts 102 are pre-embedded in the prefabricated concrete slab 101, the spliced ​​steel plate 103 is fitted on the bottom surface of the prefabricated concrete slab 101, and the spliced ​​steel plate 103 can serve as a partial bottom plate of the concrete slab 101, and a first flange plate 241 and a second flange plate 242 are horizontally arranged on the top of the composite steel beam 200, both of which are provided with bolting holes corresponding to the bolting holes on the spliced ​​steel plate 103, and the bridge deck 100 is fixed to the top of the composite steel beam 200 by mechanical bolts 300.

[0031] Furthermore, if Figure 1-Figure 5 As shown, the bridge deck 100 also includes a connecting steel plate 104. Due to the large transverse span of the bridge, when assembling the bridge deck 100, the bridge deck 100 is assembled in sections along the central axis of the bridge. The connecting steel plate 104 is vertically welded and fixed to the splicing steel plate 103 at the central axis of the bridge. The connecting steel plate 104 also serves as the side wall of the two bridge decks 100 on the side close to the central axis. The connecting steel plate 104 and the splicing steel plate 103 at the bottom form an L-shaped structure. After the bridge deck 100 is cast, it also plays a role in protecting the side to prevent the edge of the bridge deck 100 from collision and damage during transportation and installation. During the assembly of the bridge deck 100, an adhesive is applied to the gap between the connecting steel plates 104 on the side close to the central axis of the two bridge decks 100, so that the bridge deck 100 can be Seamless assembly, further, the first flange plate 241 is arranged on both sides of the combined steel beam 200, and the second flange plate 242 is arranged on the central axis of the combined steel beam 200, and the second flange plate 242 and the spliced ​​steel plate 103 are fixed by bolt connection to complete the installation of the bridge plate 100 near the central axis. The installation process is simple and fast. When the bridge deck 100 is damaged and needs maintenance in the later stage of the bridge, the fixed connection between the first flange plate 241, the second flange plate 242 and the spliced ​​steel plate 103 is released respectively, and the bridge deck 100 can be dismantled and replaced, which can save maintenance costs and improve construction efficiency. The maintenance work can be quickly completed on the damaged area, which solves the problem that the traditional combined beam structure does not divide the bridge deck on one side of the central axis, and it is difficult to achieve rapid zoning maintenance on site.

[0032] Furthermore, if Figure 1-Figure 5 As shown, the composite steel beam 200 includes a cross beam 210 and a longitudinal beam 220. The cross beam 210 is located in the middle area of ​​two bridge pillars. The longitudinal beam 220 and the cross beam 210 are connected at their intersections in the form of suppositories to ensure the factory-based fully prefabricated assembly function of the composite steel beam 200.

[0033] Furthermore, if Figure 1-Figure 6 As shown, it includes a removal module 600 and a dehumidification module 700. The removal module 600 includes a hydraulic cylinder 610, a cylinder support frame 620, a hydraulic oil pipe 630, and a hydraulic pump 640. The cylinder support frame 620 is fixed to one side of the longitudinal beam 220 by welding. Preferably, in order to enhance its strength, a reinforcing rib should be provided at the bottom support. The hydraulic cylinder 610 is fixedly installed on the cylinder support frame 620. The movable end of the hydraulic cylinder 610 passes through the reserved through holes on the first flange plate 241 and the second flange plate 242, and abuts against the bottom of the spliced ​​steel plate 103. The hydraulic cylinder 610 It is connected to the hydraulic pump 640 through the hydraulic oil pipe 630. The hydraulic pump 640 is fixed on the longitudinal beam 220. When the bridge deck 100 needs to be replaced, the mechanical bolts 300 are first removed, and the hydraulic pump 640 is started. The power is transmitted to the movable end of the hydraulic cylinder 610 through the hydraulic oil pipe 630. The movable end is lifted upward to lift the spliced ​​steel plate 103 away from the second flange plate 242, thereby realizing the function of quickly replacing the bridge deck 100. The replacement can be completed without large-scale construction machinery, which solves the problem of rust and combination of the spliced ​​steel plate 103 and the second flange plate 242 under long-term use conditions.

[0034] Furthermore, if Figure 1-Figure 6 As shown, the dehumidification module 700 includes a first fixed head 701, a protective cover 702, a fan fixing frame 703, a dehumidifier 704, and a second fixed head 705. The first fixed head 701 and the second fixed head 705 are respectively fixed on the longitudinal beam 220 and the bottom of the second flange plate 242. The protective cover 702 is a retractable curtain-like structure, and its top and bottom are detachably connected to the second fixed head 705 and the first fixed head 701 respectively. The protective cover 702 covers the mechanical bolts 300, the second flange plate 242 and the bolting holes, etc., to prevent dust, debris and rainwater from entering. , the mechanical bolts 300, the second flange plate 242 and the bolting holes are protected to prevent rust. Furthermore, the fan fixing frame 703 is fixed to one side of the longitudinal beam 220, and is used to fix and support the dehumidifier 704. The dehumidifier 704 is connected to the power supply from the bottom of the combined box beam 200, and the dehumidifier 704 is driven regularly to dehumidify the area covered by the protective cover 702, thereby further improving the anti-corrosion protection of the mechanical bolts 300, the second flange plate 242 and the bolting holes, extending the service life, and solving the problem of difficulty in dismantling the bridge deck 100 due to rust of the steel structure connectors.

[0035] Furthermore, if Figure 1-Figure 6 As shown, the installation method of the assembled bridge deck structure comprises the following steps:

[0036] S100, prefabricates concrete bridge decks and composite steel beams in factories, and transports them to the construction site in batches after prefabrication;

[0037] S200, on-site mechanical assembly of composite steel beams, after assembly, hoisting and erection to the designated construction location;

[0038] S300, hoisting and installing the concrete bridge deck to the designated location, applying adhesive to the surface of the connecting plate at the end of the concrete bridge deck before installation, and assembling and squeezing the adhesive during the installation process to achieve seamless adhesive connection of the concrete bridge deck;

[0039] S400, the bolts are passed through the reserved bolting holes after assembly and alignment and tightened, completing the assembly of the concrete bridge deck and the composite steel beam, installing and removing the module 600 and the dehumidification module 700. When a bridge deck 100 needs to be maintained and replaced, the bolted connection is released, and the bridge deck can be lifted and removed.

[0040] S401, use the dismantling module 600 to quickly replace the bridge deck 100. After confirming the bridge deck 100 that needs to be replaced, remove the corresponding protective cover 702 at the bottom, remove the mechanical bolts 300, release the lock of the flange plate on the spliced ​​steel plate 103, start the hydraulic pump 640 to output pressure to the hydraulic cylinder 610, and the movable end of the hydraulic cylinder 610 pushes upward to lift the spliced ​​steel plate 103 through the reserved through hole. Without the need for large-scale lifting engineering machinery, the bridge deck 100 is lifted and replaced. After the new prefabricated bridge deck 100 is placed, the movable end retracts, and the spliced ​​steel plate 103 at the bottom of the new bridge deck 100 is lowered to the flange plate. After the bolting holes on the two are aligned, they are fixed with mechanical bolts 300 to complete the rapid replacement of the bridge deck 100.

[0041] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled bridge deck structure, a bridge deck (100) and a composite steel beam (200), characterized in that: The invention also comprises a dismantling module (600), wherein the dismantling module (600) is fixed on the composite steel beam (200), the bridge deck (100) comprises a concrete slab (101), bolts (102), and a spliced ​​steel plate (103), wherein the bolts (102) are vertically welded and fixed on the spliced ​​steel plate (103), the bolts (102) and the spliced ​​steel plate (103) are pre-embedded in the concrete slab (101), and the spliced ​​steel plate (103) is fitted on the bottom surface of both sides of the concrete slab (101), and a first flange plate (241) and a second flange plate (242) are horizontally fixed on the top of the composite steel beam (200), wherein the first flange plate (241) and the second flange plate (242) are arranged There are bolting holes, which correspond to the bolting holes set on the spliced ​​steel plate (103). The first flange plate (241) and the second flange plate (242) are respectively bolted and connected to the spliced ​​steel plate (103) on both sides of the bottom of the concrete plate (101) through the bolting holes, and the bridge deck (100) is dismantled by releasing the bolts; the dismantling module (600) includes a hydraulic cylinder (610) and a hydraulic pump (640), the hydraulic pump (640) transmits power to the hydraulic cylinder (610), the movable end of the hydraulic cylinder (610) abuts against the bottom of the spliced ​​steel plate (103), and the bolts are released to drive the hydraulic cylinder (610) to achieve the function of lifting the bridge deck (100); The composite steel beam (200) comprises a cross beam (210) and a longitudinal beam (220), wherein the cross beam (210) is fixedly arranged along the transverse direction of the bridge, and the longitudinal beam (220) passes through the cross beam (210) along the longitudinal direction of the bridge; It also includes a dehumidification module (700), which is fixed on the combined steel beam (200) and includes a protective cover (702) and a dehumidifier (704). The protective cover (702) is a retractable curtain-like structure. The protective cover (702) is fixed on the longitudinal beam (220) and the second flange plate (242). The dehumidifier (704) is fixed on the longitudinal beam (220) to dehumidify the area covered by the protective cover (702).

2. The assembled bridge deck structure according to claim 1, characterized in that: The second flange plate (242) is provided with a reserved through hole, and the movable end passes through the reserved through hole and abuts against the bottom of the spliced ​​steel plate (103).

3. The assembled bridge deck structure according to claim 1, characterized in that: The first flange plate (241) and the second flange plate (242) are respectively arranged on both sides and the middle of the composite steel beam (200); the bridge deck (100) comprises a connecting steel plate (104); the connecting steel plate (104) is vertically welded and fixed to the spliced ​​steel plate (103) at the central axis of the bridge; the connecting steel plate (104) and the spliced ​​steel plate (103) form an L-shaped structure; the two bridge decks (100) are separated by the two L-shaped structures at the connection point of the central axis of the bridge; the two bridge decks (100) are respectively bolted to the second flange plate (242) in the middle of the composite steel beam (200).

4. The assembled bridge deck structure according to claim 3, characterized in that: The longitudinal beam (220) and the transverse beam (210) are fixedly connected.

5. The assembled bridge deck structure according to claim 4, characterized in that: The removal module (600) comprises a hydraulic oil pipe (630), the hydraulic cylinder (610) and the hydraulic pump (640) are connected via the hydraulic oil pipe (630), and the hydraulic pump (640) is fixed to the longitudinal beam (220).

6. The assembled bridge deck structure according to claim 4, characterized in that: The removal module (600) comprises a cylinder support frame (620), wherein the cylinder support frame (620) is fixed to one side of the longitudinal beam (220), and the hydraulic cylinder (610) is fixed to the cylinder support frame (620).

7. The assembled bridge deck structure according to claim 1, characterized in that: The dehumidification module (700) includes a first fixed head (701) and a second fixed head (705), wherein the first fixed head (701) and the second fixed head (705) are respectively fixed to the longitudinal beam (220) and the bottom of the second flange plate (242), and the top and bottom of the protective cover (702) are respectively detachably connected to the first fixed head (701) and the second fixed head (705), and the protective cover (702) covers the second flange plate (242) and the bolting hole.

8. The assembled bridge deck structure according to claim 7, characterized in that: The dehumidification module (700) comprises a fan fixing frame (703), wherein the fan fixing frame (703) is fixed to one side of the longitudinal beam (220) and is used for fixing and supporting the dehumidifier (704).

9. A method for installing an assembled bridge deck structure, characterized in that: The method is implemented by using an assembled bridge deck structure as described in any one of claims 1 to 8, comprising the following steps: S100, prefabricates concrete bridge decks and composite steel beams in factories, and transports them to the construction site in batches after prefabrication; S200, on-site mechanical assembly of composite steel beams, after assembly, hoisting and erection to the designated construction location; S300, hoisting and installing the concrete bridge deck to the designated location, applying adhesive to the surface of the connecting plate at the end of the concrete bridge deck before installation, and assembling and squeezing the adhesive during the installation process to achieve seamless adhesive connection of the concrete bridge deck; S400, the bolts pass through the reserved bolting holes after assembly and alignment and are tightened to complete the assembly of the concrete bridge deck and the composite steel beam. When a bridge deck needs to be maintained or replaced, the bolted connection is released and the bridge deck can be lifted and removed.

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