A movable bridge deck panel installation platform and method of construction

Abstract

The application discloses a movable bridge deck panel installation platform and a construction method thereof. The movable bridge deck panel installation platform comprises a steel plate leg, an angle steel leg and a steel panel, is installed on the upper side of a bridge deck panel, the steel plate leg and the angle steel leg are supported on a main force component of a steel beam, load is transmitted to the main force component of the steel beam, the safety of the steel beam structure is ensured, a caterpillar crane is moved to the steel panel to perform hoisting operation, direct contact with the bridge deck panel is avoided, bridge deck panel cracking is avoided, compared with a traditional automobile crane or a special frame plate machine, the efficiency is higher and the economy is better, through a construction method of cyclically adopting a hoisting bridge deck panel, installing the movable bridge deck panel installation platform, moving the caterpillar crane to the installation platform, hoisting the next bridge deck panel, space occupation of a construction site is less, and the construction method has the advantages of convenient construction, rapidness, convenience, safety and the like.

Description

Technical Field

[0001] This invention relates to the field of construction technology for steel-concrete composite beams of cable-stayed bridges. More specifically, this invention relates to a movable bridge deck installation platform and its construction method. Background Technology

[0002] Steel-concrete composite beams are a new type of structural form developed based on steel and concrete structures. By installing shear connectors between the steel beams and concrete flanges, they resist uplift and relative slippage at the interface, making them work as a unified whole. Compared with reinforced concrete beams, steel-concrete composite beams can reduce structural self-weight, reduce seismic forces, reduce cross-sectional dimensions, increase usable space, save on formwork and template work, shorten construction time, and increase beam ductility. Compared with steel beams, they can reduce steel consumption, increase stiffness, increase stability and integrity, and enhance structural fire resistance and durability. Currently, steel-concrete composite beams are widely used in China.

[0003] Bridge decks, as the most commonly used concrete structure in steel-concrete composite beams, are typically prefabricated in a prefabrication yard and then transported to the site for installation using cranes. Commonly used cranes include truck cranes, crawler cranes, and specialized scaffolding machines. Crawler cranes are more flexible than truck cranes and less expensive than specialized scaffolding machines, making them the most common method for bridge deck installation.

[0004] However, the following technical challenges generally exist when using crawler cranes to install bridge decks:

[0005] 1. When the crawler crane installs the bridge deck, as the crawler crane goes up onto the bridge, the tracks of the crawler crane will come into direct contact with the bridge deck, causing the prefabricated bridge deck to crack.

[0006] Second, before the bridge deck is connected as a whole, the installation of the bridge deck by the crawler crane mainly relies on the steel beams for stress. When the crawler crane lifts the bridge deck, the load is often large, so the load must be transferred to the main load-bearing members of the steel beams. The weak parts of the steel beams should not be subjected to excessive stress to avoid permanent damage to the steel beams or even brittle fracture. Summary of the Invention

[0007] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0008] Another objective of this invention is to provide a movable bridge deck installation platform and its construction method, in order to solve the technical problem that bridge decks and steel beams are easily damaged when using mobile lifting equipment to install bridge decks in the prior art.

[0009] To achieve these objectives and other advantages according to the present invention, in one aspect, the present invention provides a movable bridge deck installation platform disposed on a bridge deck, the bridge deck being erected on steel beams along the longitudinal direction of the bridge, a longitudinal wet joint being formed on the outer side of the bridge deck, and shear grooves being provided on the bridge deck along the longitudinal direction of the bridge. The installation platform includes:

[0010] Steel plate legs are spaced along the wet joint, with the bottom of each steel plate leg supported on the main load-bearing component of the steel beam at the wet joint.

[0011] Angle steel legs are spaced apart along the arrangement direction of the shear grooves in the bridge deck construction. Each angle steel leg is inserted downward into a shear groove and supported on the main load-bearing component of the steel beam at the corresponding position.

[0012] The steel panel is connected to the top of the steel plate legs and the angle steel legs, and its bottom surface is higher than the bridge deck. The steel panel covers the wet joint to the shear groove of the bridge deck on the side away from the wet joint in the transverse direction of the bridge. The steel panel completely covers the bridge deck in the longitudinal direction of the bridge. The upper surface of the steel panel is used to support the crawler crane.

[0013] Preferably, the steel plate leg includes multiple steel plates arranged parallel to each other along the longitudinal direction of the bridge. The top of the multiple steel plates is connected to a first plate, which is welded to the bottom of the steel plate. All the steel plates of each steel plate leg are connected to a first stiffening plate on the left and right sides of the longitudinal direction of the bridge.

[0014] Preferably, the angle steel leg includes multiple angle steels arranged in a rectangular pattern, with a second plate welded to the top of the multiple angle steels. The second plate is welded to the bottom of the steel panel, and each angle steel is arranged vertically. A second stiffening plate is connected between the outer sides of a row of angle steels.

[0015] Preferably, a lug is attached to the side of the steel panel for connection with a crawler crane.

[0016] Preferably, a padding structure is provided at the bottom of the steel panel to compensate for unevenness after the bridge panel mounting platform is placed on the bridge panel.

[0017] Preferably, the steel panel includes a first steel section, a second steel section, and a panel layer arranged sequentially from bottom to top. The first steel section is arranged along the longitudinal direction of the bridge. All the steel plate legs corresponding to each installation platform are connected to the bottom of a first steel section. All the angle steel legs corresponding to each installation platform are connected to the bottom of a first steel section. The second steel section is arranged parallel to the transverse direction of the bridge and multiple sections are evenly spaced along the longitudinal direction of the bridge. The two ends of each second steel section are respectively connected to the top of two first steel sections. The panel layer is welded to the top of all the second steel sections.

[0018] On the other hand, the present invention also provides a construction method for a movable bridge deck installation platform, comprising the following steps:

[0019] S1. Set the dimensions of the steel plate legs and the angle steel legs according to the width of the wet joint and the cross-sectional dimensions of the steel beam, and hoist the first bridge deck panel using a crawler crane;

[0020] S2. Install the first installation platform on the first bridge deck panel. First, support the steel plate leg on the steel beam at the wet joint. Then, support the angle steel leg on the inside of the shear groove on the side of the first bridge deck panel away from the wet joint. Then, use a crawler crane to lift a steel panel, align the wet joint with one edge of the bridge deck panel, and weld and fix the steel panel to the steel plate leg and the angle steel leg to form the installation platform.

[0021] S3. Drive the crawler crane onto the first installation platform, then use the crawler crane to lift the second bridge panel located in the longitudinal construction direction of the bridge, and install the corresponding second installation platform on the second bridge panel;

[0022] S4. Drive the crawler crane onto the second installation platform, repeat the S3 operation, and hoist the bridge panel and the installation platform in sequence. Multiple consecutive installation platforms form a platform group.

[0023] S5. Drive the crawler crane to continue moving forward to install the next bridge panel, and at the same time use the crawler crane to transfer the first installation platform to the next bridge panel, thereby realizing the forward movement of the platform group;

[0024] S6. Repeat step S5 until all the bridge panels are installed.

[0025] Preferably, when hoisting the first installation platform, spacer members are provided at both ends of the side of the first installation platform facing the second installation platform, corresponding to the positions of the second steel section. The spacer members include:

[0026] The support vertical plate has a magnetic surface on one side and a smooth surface on the other. The support vertical plate is temporarily attached to the side of the steel panel of the first installed mounting platform by magnetic attraction. The bottom center of the support vertical plate has a circular pivot hole. The height of the support vertical plate is less than the height of the steel panel. When the second mounting platform is spliced ​​with the first mounting platform, it slides along the smooth surface of the support vertical plate to guide the relative movement of the mounting platforms.

[0027] The upper end of the rotating shaft extends upward into the rotating shaft hole and is slidably connected to the side wall of the rotating shaft hole. The lower end of the rotating shaft is provided with a universal joint on the side facing the first mounting platform and is connected to a gate-shaped groove through the universal joint.

[0028] The padding component has a cross-sectional dimension smaller than the inner dimension of the gate-shaped groove. After passing through the gate-shaped groove, the padding component extends into the bottom of the adjacent second or first plate or provides support to compensate for the height difference of uneven areas.

[0029] The present invention has at least the following beneficial effects:

[0030] (1) The movable bridge deck installation platform of the present invention is installed on the upper side of the bridge deck, and the steel plate legs and angle steel legs are supported on the main load-bearing components of the steel beam, so that the crawler crane does not directly contact the bridge deck, avoiding cracking of the bridge deck. The movable bridge deck installation platform transmits the load to the main load-bearing members of the steel beam through the steel plate legs and angle steel legs, ensuring the safety of the steel beam structure.

[0031] (2) The movable bridge panel installation platform has a simple structure, clear stress distribution, and low cost. Compared with traditional truck cranes or special scaffolding machines, it is more efficient and economical. By cyclically using the construction method of hoisting bridge panels, installing the movable bridge panel installation platform, transferring the crawler crane to the installation platform, and hoisting the next bridge panel, it occupies less space on the construction site and has the advantages of convenient, fast and safe construction.

[0032] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0033] Figure 1 This is a front view structural diagram of the movable bridge deck mounting platform of the present invention;

[0034] Figure 2 This is a top view of the movable bridge deck mounting platform of the present invention.

[0035] Figure 3 The steel plate support leg of the present invention is in Figure 2 Side view of the structure along direction AA;

[0036] Figure 4 The angle steel support leg of the present invention is in Figure 2 Side view of the structure in the BB direction;

[0037] Figure 5 This is a construction diagram of step S1 in the construction method of the movable bridge deck installation platform of the present invention.

[0038] Figure 6 This is a construction diagram of step S2 in the construction method of the movable bridge deck installation platform of the present invention.

[0039] Figure 7This is a construction diagram of step S3 in the construction method of the movable bridge deck installation platform of the present invention.

[0040] Figure 8 This is a construction diagram of step S4 in the construction method of the movable bridge deck installation platform of the present invention.

[0041] Figure 9 This is a construction diagram of step S5 in the construction method of the movable bridge deck installation platform of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of a diaphragm member according to an embodiment of the present invention.

[0043] Instruction manual drawing reference numerals: 1. Wet joint, 2. Bridge deck, 3. Shear groove, 4. Steel plate leg, 5. Main load-bearing component of steel beam, 6. Angle steel leg, 7. Steel panel, 8. Crawler crane, 9. Steel plate, 10. First stiffening plate, 11. Angle steel, 12. Second stiffening plate, 13. First section steel, 14. Second section steel, 15. Panel layer, 16. First cladding plate, 17. Second cladding plate, 18. Support vertical plate, 19. Magnetic surface, 20. Universal joint, 21. Rotary shaft hole, 22. Rotary shaft, 23. Portal slot, 24. Pad, 25. Installation platform. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0045] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0046] like Figure 1 , 2 As shown in Figures 5-9, the present invention provides a movable bridge deck installation platform, which is set on a bridge deck 2. The bridge deck 2 is erected on a steel beam 5 along the longitudinal direction of the bridge. A longitudinal wet joint 1 is formed on the outer side of the bridge deck 2. Shear grooves 3 are provided on the bridge deck 2 along the longitudinal direction of the bridge. The installation platform 25 includes:

[0047] Steel plate legs 4 are spaced along the wet joint 1, and the bottom of each steel plate leg 4 is supported on the main load-bearing member 5 of the steel beam at the wet joint 1.

[0048] Angle steel legs 6 are spaced apart along the arrangement direction of shear grooves 3 constructed on the bridge deck 2. Each angle steel leg 6 is inserted downward into a shear groove 3 and supported on the main load-bearing component 5 of the steel beam at the corresponding position.

[0049] The steel panel 7 is connected to the top of the steel plate leg 4 and the angle steel leg 6 and its bottom surface is higher than the bridge panel 2. The steel panel 7 covers the wet joint 1 to the shear groove 3 on the side of the bridge panel 2 away from the wet joint 1 in the transverse direction of the bridge. The steel panel 7 completely covers the bridge panel 2 in the longitudinal direction of the bridge. The upper surface of the steel panel 7 is used to support the crawler crane 8.

[0050] A single bridge panel 2 is lifted using a crawler crane 8. The lifting range of the crawler crane 8 can generally include at least three bridge panels 2 along their longitudinal length. Then, an installation platform 25 is installed onto the bridge panel 2. The installation platform 25 is not fixed to the steel beam 5; it can be moved by lifting it using the crawler crane 8. The steel panel 7's dimensions in the transverse direction basically cover the distance from the wet joint 1 to the shear groove 3, and in the longitudinal direction it is slightly larger than the bridge panel 2, facilitating continuous splicing of multiple installation platforms 25 above the bridge panel 2 and the movement of the crawler crane 8. Steel plate legs 4 support the steel panel 7 on one side in the direction of the wet joint 1, and angle steel legs 6 support the other side of the steel panel 7, forming a balanced support. The steel plate legs 4 are designed according to the structural shape and position of the main load-bearing components 5 of the steel beam to ensure stable support. The dimensions of the shear groove 3 are also considered. Based on the location and reinforcement situation, angle steel legs 6 are set to facilitate direct contact with the main load-bearing members 5 of the steel beam below at the shear groove 3 for support. The bottom of the angle steel legs 6 and steel plate legs 4 are supported on the main load-bearing members 5 of the steel beam to ensure that the stress and deformation of the steel beam itself are not too large. The installation platform 25 isolates the corresponding bridge panel 2 at the bottom of the installation platform 25. The crawler crane 8 moves to the installation platform 25, and the installation platform 25 bears the load applied by the crawler crane 8. The load is transferred from the steel panel 7 to the steel plate legs 4 and angle steel legs 6. The crawler crane 8 lifts the next bridge panel 2 on the forward path on the installation platform 25. The cycle of lifting bridge panel 2, lifting installation platform 25, crawler crane 8 moving to the new installation platform 25, and lifting the next bridge panel 2 is repeated until the installation of a row of bridge panels 2 is completed.

[0051] In another technical solution, such as Figure 1-3As shown, the steel plate support leg 4 includes multiple steel plates 9 arranged parallel to each other along the longitudinal direction of the bridge. A first mounting plate 16 is connected to the top of all the steel plates 9. The first mounting plate 16 is welded to the bottom of the steel panel 7. All the steel plates 9 of each steel plate support leg 4 are connected to a first stiffening plate 10 on both the left and right sides along the longitudinal direction of the bridge. By setting the first stiffening plate 10, the steel plate support leg 4 is reinforced, ensuring its strength and stability.

[0052] In another technical solution, such as Figure 1 , 2 As shown in Figure 4, the angle steel leg 6 includes multiple angle steels 11 arranged in a rectangular pattern. A second plate 17 is welded to the top of the multiple angle steels 11. The second plate 17 is welded to the bottom of the steel panel 7. Each angle steel 11 is arranged vertically, and a second stiffening plate 12 is connected between the outer sides of a row of angle steels 11. By setting the second stiffening plate 12, the angle steel leg 6 is reinforced to ensure the strength and stability of the angle steel leg 6.

[0053] In another technical solution, such as Figure 10 As shown, a padding structure is provided at the bottom of the steel panel 7 to compensate for unevenness after the bridge deck 2 mounting platform 25 is placed on the bridge deck 2. The padding structure can be made of steel pipe and placed at the bottom of the steel panel 7.

[0054] In another technical solution, a lug is attached to the side of the steel panel 7 for connection with the crawler crane 8. The lug facilitates the connection of the crawler crane 8's hook with the lug, enabling the lifting of a single section of the installation platform 25.

[0055] In another technical solution, such as Figure 1 , 3 As shown in Figure 4, the steel panel 7 includes a first steel section 13, a second steel section 14, and a panel layer 15 arranged sequentially from bottom to top. The first steel section 13 is arranged along the longitudinal direction of the bridge. All the steel plate legs 4 corresponding to each mounting platform 25 are connected to the bottom of a first steel section 13. All the angle steel legs 6 corresponding to each mounting platform 25 are connected to the bottom of a first steel section 13. The second steel section 14 is arranged parallel to the transverse direction of the bridge and is evenly spaced in multiples along the longitudinal direction. The two ends of each second steel section 14 are respectively connected to the tops of two first steel sections 13. The panel layer 15 is welded to the tops of all the second steel sections 14.

[0056] The first type of steel 13 is set to facilitate welding with the angle steel leg 6 and the steel plate leg 4. The second type of steel 14 is set to reinforce the overall structure of the installation platform 25. Finally, the panel layer 15 is connected, which can withstand a large load and ensure structural stability and construction safety.

[0057] This invention also provides a construction method for a movable bridge deck installation platform, combined with... Figure 5-9 As shown, it includes the following steps:

[0058] S1, Combination Figure 5 As shown, the dimensions of the steel plate support leg 4 and the angle steel support leg 6 are set according to the width of the wet joint 1 and the cross-sectional dimensions of the steel beam 5, and the first bridge deck 2 is hoisted by the crawler crane 8.

[0059] S2, Combination Figure 6 As shown, the first installation platform 25 is installed on the first bridge deck 2. First, the steel plate leg 4 is supported on the main load-bearing component 5 of the steel beam at the wet joint 1. Then, the angle steel leg 6 is supported on the inner side of the shear groove 3 on the side of the first bridge deck 2 away from the wet joint 1. After that, a steel panel 7 is lifted by the crawler crane 8, aligned with one edge of the wet joint 1 and the bridge deck 2, and the steel panel 7 is welded and fixed to the steel plate leg 4 and the angle steel leg 6 to form the installation platform 25.

[0060] S3, Combination Figure 7 As shown, the crawler crane 8 is driven onto the first installation platform 25, and then the crawler crane 8 is used to lift the second bridge deck 2 located in the longitudinal construction direction of the bridge, and install the corresponding second installation platform 25 on the second bridge deck 2.

[0061] S4, Combination Figure 8 As shown, the crawler crane 8 is driven onto the second installation platform 25, and the S3 operation is repeated to sequentially hoist the bridge panel 2 and the installation platform 25. Multiple consecutive installation platforms 25 form a platform group.

[0062] S5, Combination Figure 9 As shown, the crawler crane 8 is driven to continue moving forward to install the next bridge panel 2. At the same time, the crawler crane 8 is used to transfer the first installation platform 25 to the next bridge panel 2, thereby realizing the forward movement of the platform group.

[0063] S6. Repeat step S5 until all the bridge panels 2 are installed.

[0064] This method involves a cyclical approach: hoisting the bridge panel 2, installing the movable bridge panel 2 installation platform 25, transferring the crawler crane 8 to the installation platform 25, and hoisting the next bridge panel 2. This method requires less space on the construction site and has advantages such as convenient, fast, and safe construction.

[0065] In another technical solution, such as Figure 10As shown, when hoisting the first installation platform 25, spacer components are installed at both ends of the side of the first installation platform 25 facing the second installation platform 25, corresponding to the positions of the second steel section 14. The spacer components include:

[0066] The support vertical plate 18 has a magnetic surface 19 on one side and a smooth surface on the other side. The support vertical plate 18 is temporarily attached to the side of the steel panel 7 of the first installed mounting platform 25 by means of the magnetic surface 19. The bottom center of the support vertical plate 18 has a rotating shaft hole 21 with a circular cross-section. The height of the support vertical plate 18 is less than the height of the steel panel 7. When the second mounting platform 25 is spliced ​​with the first mounting platform 25, it slides along the smooth surface of the support vertical plate 18 to guide the relative movement of the mounting platform 25.

[0067] The upper end of the rotating shaft 22 extends upward into the rotating shaft hole 21 and is slidably connected to the side wall of the rotating shaft hole 21. The lower end of the rotating shaft 22 is connected downward to the gate-shaped groove 23.

[0068] The padding component 24 has a cross-sectional dimension smaller than the inner dimension of the gate groove 23. After passing through the gate groove 23, the padding component 24 extends into the bottom of the adjacent second plate 17 or the first plate 16 to provide support, so as to compensate for the height difference of the uneven area.

[0069] A support vertical plate 18 is positioned between the edges of two installation platforms 25 to be assembled. The support vertical plate 18 protects the next installation platform 25 during assembly, preventing direct collision damage. Temporary fixing using the magnetic surface 19 facilitates easy installation and disassembly. After two adjacent installation platforms 25 are assembled, the support vertical plate 18 is clamped in the middle. A rotating shaft 22 is inserted into the bottom of the support vertical plate 18. The length of the rotating shaft 22 can be temporarily adjusted according to the actual distance between the steel panel 7 and the bridge panel 2, ensuring that the depth of the rotating shaft hole 21 is greater than the depth of the rotating shaft 22. The rotating shaft hole 21 limits the axial movement of the rotating shaft 22. The circular cross-sectional shape allows the rotating shaft 22 to rotate freely, adjusting the orientation of the portal groove 23. Through the connected universal joint 20, the portal groove 23 can fit more closely against the surface of the bridge deck 2. Then, relying on the limiting position of the portal groove 23, the padding component 24 is inserted to raise the angle steel leg 6 or steel plate leg to a suitable height, preventing the padding component 24 from sliding freely. If only one end is uneven, the padding component can be inserted only at the uneven end. Of course, the size of the padding component 24 can be adjusted according to the need for padding. It can even be set as a slope with a certain gradient, with both ends extending into the bottom of the two adjacent installation platforms 25 for continuous height compensation.

[0070] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A movable bridge deck mounting platform, characterized in that, The bridge deck is installed on the steel beams along the longitudinal direction, forming a longitudinal wet joint on the outer side of the bridge deck. Shear grooves are provided on the bridge deck along the longitudinal direction. The installation platform includes: Steel plate legs are spaced along the wet joint, with the bottom of each steel plate leg supported on the main load-bearing component of the steel beam at the wet joint. Angle steel legs are spaced apart along the arrangement direction of the shear grooves in the bridge deck construction. Each angle steel leg is inserted downward into a shear groove and supported on the main load-bearing component of the steel beam at the corresponding position. The steel panel is connected to the top of the steel plate legs and the angle steel legs, and its bottom surface is higher than the bridge deck. The steel panel covers the wet joint to the shear groove of the bridge deck on the side away from the wet joint in the transverse direction of the bridge. The steel panel completely covers the bridge deck in the longitudinal direction of the bridge. The upper surface of the steel panel is used to support the crawler crane.

2. The movable bridge deck mounting platform as described in claim 1, characterized in that, The steel plate support leg includes multiple steel plates arranged parallel to each other along the longitudinal direction of the bridge. The top of the multiple steel plates is connected to a first plate, which is welded to the bottom of the steel plate. All the steel plates of each steel plate support leg are connected to a first stiffening plate on the left and right sides of the longitudinal direction of the bridge.

3. The movable bridge deck mounting platform as described in claim 2, characterized in that, The angle steel support leg includes multiple angle steels arranged in a rectangular pattern. A second plate is welded to the top of the multiple angle steels. The second plate is welded to the bottom of the steel panel. Each angle steel is arranged vertically. A second stiffening plate is connected between the outer sides of a row of angle steels.

4. The movable bridge deck mounting platform as described in claim 1, characterized in that, Lugs are attached to the side of the steel panel for connection with a crawler crane.

5. The movable bridge deck mounting platform as described in claim 3, characterized in that, A padding structure is provided at the bottom of the steel panel to compensate for unevenness after the bridge panel mounting platform is placed on the bridge panel.

6. The movable bridge deck mounting platform as described in claim 5, characterized in that, The steel panel includes a first steel section, a second steel section, and a panel layer arranged sequentially from bottom to top. The first steel section is arranged along the longitudinal direction of the bridge. All the steel plate legs corresponding to each installation platform are connected to the bottom of a first steel section. All the angle steel legs corresponding to each installation platform are connected to the bottom of a first steel section. The second steel section is arranged parallel to the transverse direction of the bridge and multiple sections are evenly spaced along the longitudinal direction of the bridge. The two ends of each second steel section are respectively connected to the top of two first steel sections. The panel layer is welded to the top of all the second steel sections.

7. The construction method of the movable bridge deck installation platform as described in claim 6, characterized in that, Includes the following steps: S1. Set the dimensions of the steel plate legs and the angle steel legs according to the width of the wet joint and the cross-sectional dimensions of the steel beam, and hoist the first bridge deck panel using a crawler crane; S2. Install the first installation platform on the first bridge deck panel. First, support the steel plate leg on the steel beam at the wet joint. Then, support the angle steel leg on the inside of the shear groove on the side of the first bridge deck panel away from the wet joint. Then, use a crawler crane to lift a steel panel, align the wet joint with one edge of the bridge deck panel, and weld and fix the steel panel to the steel plate leg and the angle steel leg to form the installation platform. S3. Drive the crawler crane onto the first installation platform, then use the crawler crane to lift the second bridge panel located in the longitudinal construction direction of the bridge, and install the corresponding second installation platform on the second bridge panel; S4. Drive the crawler crane onto the second installation platform, repeat the S3 operation, and sequentially hoist the bridge panel and the installation platform. Multiple consecutive installation platforms form a platform group. S5. Drive the crawler crane to continue moving forward to install the next bridge panel, and at the same time use the crawler crane to transfer the first installation platform to the next bridge panel, thereby realizing the forward movement of the platform group; S6. Repeat step S5 until all the bridge panels are installed.

8. The construction method of the movable bridge deck installation platform as described in claim 7, characterized in that, When hoisting the first installation platform, spacer components are installed at both ends of the side of the first installation platform facing the second installation platform, corresponding to the positions of the second steel section. The spacer components include: The support vertical plate has a magnetic surface on one side and a smooth surface on the other. The support vertical plate is temporarily attached to the side of the steel panel of the first installed mounting platform by magnetic attraction. The bottom center of the support vertical plate has a circular pivot hole. The height of the support vertical plate is less than the height of the steel panel. When the second mounting platform is spliced ​​with the first mounting platform, it slides along the smooth surface of the support vertical plate to guide the relative movement of the mounting platforms. The upper end of the rotating shaft extends upward into the rotating shaft hole and is slidably connected to the side wall of the rotating shaft hole. The lower end of the rotating shaft is provided with a universal joint on the side facing the first mounting platform and is connected to a gate-shaped groove through the universal joint. The padding component has a cross-sectional dimension smaller than the inner dimension of the gate-shaped groove. After passing through the gate-shaped groove, the padding component extends into the bottom of the adjacent second or first plate to provide support, thereby compensating for the height difference at uneven points.

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