Double-layered bailey beam support

Abstract

The application discloses a double-layer Bailey beam support and relates to the technical field of bridge engineering. In order to solve the problem that the Bailey beam needs to be corrected in angle for multiple times by workers during installation of the Bailey beam, thereby leading to low Bailey beam installation efficiency, the application specifically comprises a bearing platform, a steel pipe column is fixed to the top outer wall of the bearing platform, a sand box is fixed to the top outer wall of the steel pipe column, a distribution beam is fixed to the top outer wall of the sand box, a reinforcing vertical plate is arranged on the top outer wall of the distribution beam, rectangular grooves are formed in the outer walls on the two sides of the reinforcing vertical plate, a plurality of groups of first connecting pieces are fixed to the outer walls on the two sides of the reinforcing vertical plate, fixing blocks are inserted into the outer wall on one side of the first connecting pieces, and double-layer Bailey beams are fixed to the outer walls of the fixing blocks. The application avoids the situation that the double-layer Bailey beams on one side of the reinforcing vertical plate are deviated and changed in angle after being subjected to external force when workers fix the fixing blocks by using bolts and other tools, and the installation efficiency of the double-layer Bailey beams is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and in particular to a double-layer Bailey beam support. Background Technology

[0002] Bailey bridges are truss beams assembled from Bailey bridge frames. In bridge construction, Bailey bridges are convenient and quick to use, providing the necessary support for the construction of continuous bridges spanning highways and rivers. Bailey bridge supports are devices that support the bottom of the Bailey bridge frame during the assembly of the Bailey bridge.

[0003] A search revealed Chinese patent application CN202220359410.5, which discloses a cast-in-place support for a steel pipe Bailey bridge, including embedded parts, support columns, distribution beams, and Bailey beams. The embedded parts are installed on the pier. A bridge deck is installed above the Bailey beams, scaffolding is installed above the bridge deck, and templates are installed above the scaffolding. However, this technical solution requires multiple Bailey beams to be placed on multiple corresponding distribution beams for fixed installation. The support lacks a mechanism for pre-positioning and guiding the Bailey beams placed on the distribution beams, making them susceptible to angular displacement due to external forces during installation. Furthermore, the installation angle of the Bailey beams placed on the distribution beams is prone to deviation, requiring workers to perform multiple angle corrections, resulting in low installation efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a double-layer Bailey beam support.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-layer Bailey beam support includes a foundation, a steel pipe column fixed to the top outer wall of the foundation, a sand box fixed to the top outer wall of the steel pipe column, a distribution beam fixed to the top outer wall of the sand box, a reinforcing vertical plate provided on the top outer wall of the distribution beam, multiple sets of first connecting plates fixed to the outer walls on both sides of the reinforcing vertical plate, a fixing block inserted into one side outer wall of the first connecting plate, and a double-layer Bailey beam fixed to the outer wall of the fixing block.

[0007] The top outer wall of the reinforcing vertical plate has a placement groove, and the inner wall of the placement groove is provided with a top clamping and limiting mechanism. The outer walls on both sides of the reinforcing vertical plate have a set of rectangular grooves, and the inner wall of the rectangular grooves is provided with an elastic airbag. A baffle is fixed on one side of the outer wall of the elastic airbag, and the elastic airbag is connected to the top clamping and limiting mechanism through an air supply pipe.

[0008] Preferably, the outer walls on both sides of the reinforcing vertical plate are respectively provided with mounting grooves, and a movable frame is slidably connected to the inner wall of the mounting groove. The movable frame is fixed to the inner wall of the mounting groove by screws, and a limit plate is fixed to one side of the outer wall of the movable frame.

[0009] Furthermore: the top clamping and limiting mechanism includes a cylinder, a first push plate, a second rack plate, a connecting shaft, a gear, and a second connecting piece. The cylinder is fixed to the inner wall of the placement groove. Guide slots are opened on the inner walls of both sides of the placement groove. The first push plate and the second push plate are slidably connected to the inner walls of the placement groove and the guide slot, respectively. The second connecting piece is fixed to the outer walls of both sides of the first push plate and the second push plate, respectively. One outer wall of the first push plate is fixed to the output shaft of the cylinder.

[0010] The connecting shaft is rotatably connected to the bottom inner wall of the placement groove, the gear is fixed to the outer wall of the connecting shaft, the first rack plate is fixed to one side outer wall of the first push plate, the second rack plate is fixed to one side outer wall of the second push plate, and the second rack plate and the first rack plate are respectively meshed with the gear.

[0011] A further preferred embodiment: a locking block is fixed to the top outer wall of the second connecting piece, and a conduit installation groove is opened on one side outer wall of the reinforcing vertical plate, the conduit installation groove penetrating the inner wall of one side of the rectangular groove.

[0012] As a preferred embodiment of the present invention: the outer wall of the fixing block has a first mounting hole, and the outer walls of the first connecting piece and the second connecting piece have second mounting holes respectively.

[0013] As a further preferred embodiment of the present invention, extension plates are fixed to the outer walls on both sides of the reinforcing vertical plate.

[0014] As a further embodiment of the present invention: a fixing hole is opened on one side of the outer wall of the reinforcing vertical plate, and a partition block is fixed on the inner wall of the guide groove.

[0015] Based on the aforementioned scheme: the outer walls on both sides of the reinforcing vertical plate are respectively provided with reserved grooves.

[0016] A preferred embodiment based on the aforementioned scheme is that the top outer wall of the reinforcing vertical plate is provided with a sealing cover.

[0017] A further preferred embodiment based on the aforementioned scheme is that an elastic buffer block is fixed to one side of the outer wall of the second rack plate.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The first connecting plates located on both sides of the reinforcing vertical plate can guide and limit the double-layer Bailey beam inserted on one side of the reinforcing vertical plate. At the same time, after the fixing block is inserted into the first connecting plate, it will compress the elastic airbag installed on the inner wall of the rectangular groove. At this time, while the elastic airbag buffers the moving fixing block, the compressed gas inside will be injected into the top clamping and limiting mechanism through the air supply pipe, thereby pushing the top clamping and limiting mechanism to clamp the two fixing blocks located at the top of the double-layer Bailey beam. Together with the first connecting plates, the double-layer Bailey beam supported on one side of the reinforcing vertical plate is clamped and limited, which further improves the stability of the double-layer Bailey beam when it is fixed and installed. This prevents the double-layer Bailey beam on one side of the reinforcing vertical plate from being deviated and changing angle after being subjected to external force when the fixing blocks are fixed by workers using bolts or other tools, thereby improving the installation efficiency of the double-layer Bailey beam.

[0020] 2. The reinforced vertical plate, while limiting and fixing the double-layer Bailey beams connected on both sides, works in conjunction with the bottom support platform, steel pipe column, sand box and distribution beam to support the entire double-layer Bailey beam, thereby improving the overall stability of the double-layer Bailey beam after it is fixed.

[0021] 3. Workers only need to align the fixing block at the bottom of the double-layer Bailey beam with the first connecting piece on one side of the reinforcing vertical plate to push the double-layer Bailey beam towards the reinforcing vertical plate. At this time, the continuously moving second connecting piece will slowly clamp the fixing block close to the reinforcing vertical plate. While clamping the fixing block, the position of the fixing block on the reinforcing vertical plate is automatically calibrated. Thus, workers only need to check the relative position between the fixing block at the bottom of the double-layer Bailey beam and the first connecting piece to ensure that the double-layer Bailey beam is vertically fixed to one side of the reinforcing vertical plate, improving the installation efficiency of the double-layer Bailey beam.

[0022] 4. When the elastic airbag is compressed, the internal gas will be injected into the cylinder through the air supply pipe, thereby pushing the output shaft of the cylinder to move forward. When the output shaft of the cylinder moves forward, it will push the first push plate to move forward as a whole. When the first push plate moves forward, it will push the first rack plate on one side to move forward, thereby pushing the second rack plate to move in the opposite direction through the meshing gear on one side, thereby pulling the second push plate and the first push plate to move relative to each other, so that the second connecting pieces on both sides of the second push plate and the first push plate clamp and fix the fixing block on both sides of the top of the double-layer Bailey beam.

[0023] 5. Workers can adjust the position of the movable frame on one side of the mounting slot according to the size of the distribution beam, and then fix the movable frame to the mounting slot with screws. Workers can place the reinforcing vertical plate on the distribution beam by using the two limiting plates fixed on both sides of the reinforcing vertical plate. At this time, the limiting plates fixed on both sides of the reinforcing vertical plate will be close to both sides of the distribution beam, thereby limiting the reinforcing vertical plate placed on the distribution beam and allowing the reinforcing vertical plate to be accurately fixed at the corresponding position on the top of the distribution beam. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a double-layer Bailey beam support proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the distribution beam structure of a double-layer Bailey beam support proposed in this invention;

[0026] Figure 3 This is a schematic diagram of the bottom structure of the reinforcing vertical plate of a double-layer Bailey beam support proposed in this invention;

[0027] Figure 4 This is a schematic diagram of the second connecting piece structure of a double-layer Bailey beam support proposed in this invention;

[0028] Figure 5 This is a schematic diagram of the placement groove structure of a double-layer Bailey beam support proposed in this invention;

[0029] Figure 6 This is a schematic diagram of the first connecting piece structure of a double-layer Bailey beam support proposed in this invention;

[0030] Figure 7 This is a schematic diagram of the top structure of the reinforcing vertical plate of a double-layer Bailey beam support proposed in this invention.

[0031] In the diagram: 1. Foundation, 2. Steel pipe column, 3. Distribution beam, 4. Reinforcing vertical plate, 5. Sand box, 6. Double-layer Bailey beam, 7. Sealing cover plate, 8. Reserved groove, 9. Rectangular groove, 10. First connecting piece, 11. Extension plate, 12. Mounting groove, 13. First mounting hole, 14. Fixing block, 15. Baffle, 16. Elastic airbag, 17. Conduit mounting groove, 18. Guide groove, 19. Second connecting piece, 20. Locking block, 21. Cylinder, 22. First rack plate, 23. Connecting shaft, 24. Placement groove, 25. Second push plate, 26. Second rack plate, 27. Gear, 28. First push plate, 29. Movable frame, 30. Limiting plate, 31. Fixing hole, 32. Separator block, 33. Elastic buffer block, 34. Second mounting hole. Detailed Implementation

[0032] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0033] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0034] Example 1:

[0035] A double-layer Bailey beam support, such as Figure 1-7 As shown, it includes a foundation 1, a steel pipe column 2 fixed to the top outer wall of the foundation 1, a sand box 5 fixed to the top outer wall of the steel pipe column 2, a distribution beam 3 fixed to the top outer wall of the sand box 5, a reinforcing vertical plate 4 provided on the top outer wall of the distribution beam 3, multiple sets of first connecting pieces 10 fixed to the outer walls on both sides of the reinforcing vertical plate 4, a fixing block 14 inserted into the outer wall on one side of the first connecting piece 10, and a double-layer Bailey beam 6 fixed to the outer wall of the fixing block 14.

[0036] The top outer wall of the reinforcing vertical plate 4 has a placement groove 24, and the inner wall of the placement groove 24 is provided with a top clamping and limiting mechanism. The outer walls on both sides of the reinforcing vertical plate 4 each have a set of rectangular grooves 9, and the inner wall of the rectangular grooves 9 is provided with an elastic airbag 16. A baffle 15 is fixed on one side of the outer wall of the elastic airbag 16, and the elastic airbag 16 is connected to the top clamping and limiting mechanism through an air supply pipe.

[0037] The reinforcing vertical plate 4 has mounting grooves 12 on both sides of its outer wall. A movable frame 29 is slidably connected to the inner wall of the mounting groove 12. The movable frame 29 is fixed to the inner wall of the mounting groove 12 by screws. A limit plate 30 is fixed to one side of the outer wall of the movable frame 29.

[0038] First, the workers hoisted the reinforcing vertical plate 4 onto the support frame consisting of the foundation 1, steel pipe column 2, sand box 5, and distribution beam 3. Then, they used U-shaped buckles and other fixing tools to fix the reinforcing vertical plate 4 to the corresponding position on the distribution beam 3. Next, the double-layer Bailey beam 6 was hoisted onto one side of the reinforcing vertical plate 4, and the fixing block 14 on one side of the double-layer Bailey beam 6 was aligned with the first connecting piece 10 on one side of the reinforcing vertical plate 4. Then, the hoisting equipment was used to move the double-layer Bailey beam 6 toward one side of the reinforcing vertical plate 4, so that the fixing block 14 was inserted into the first connecting piece 10 on one side of the reinforcing vertical plate 4. Then, the fixing block 14 was fixed to the first connecting piece 10 using bolts and other fixing tools, thus completing the installation of the double-layer Bailey beam 6 on one side of the reinforcing vertical plate 4. While limiting and fixing the double-layer Bailey beam 6 connected on both sides, the reinforcing vertical plate 4, together with the foundation 1, steel pipe column 2, sand box 5, and distribution beam 3 at the bottom, supports the double-layer Bailey beam 6 as a whole, improving the overall stability of the double-layer Bailey beam 6 after it is fixed.

[0039] The first connecting pieces 10 located on both sides of the reinforcing vertical plate 4 can guide and limit the double-layer Bailey beam 6 inserted on one side of the reinforcing vertical plate 4. At the same time, after the fixing block 14 is inserted into the first connecting piece 10, it will compress the elastic airbag 16 installed on the inner wall of the rectangular groove 9. At this time, while the elastic airbag 16 buffers the moving fixing block 14, the gas inside the compressed airbag will be filled into the top clamping and limiting mechanism through the air supply pipe, thereby pushing the top clamping and limiting mechanism to clamp the two fixing blocks 14 located at the top of the double-layer Bailey beam 6. Together with the first connecting pieces 10, the double-layer Bailey beam 6 supported on one side of the reinforcing vertical plate 4 is clamped and limited, which further improves the stability of the double-layer Bailey beam 6 when it is fixed and installed. This prevents the double-layer Bailey beam 6 located on one side of the reinforcing vertical plate 4 from being deviated and changing angle after being subjected to external force when the fixing blocks 14 are fixed by the workers with bolts or other tools, thereby improving the installation efficiency of the double-layer Bailey beam 6.

[0040] Workers can adjust the position of the movable frame 29 on one side of the mounting slot 12 according to the size of the distribution beam 3, and then fix the movable frame 29 on the mounting slot 12 with screws. Workers can place the reinforcing vertical plate 4 on the distribution beam 3 as a whole through the two limiting plates 30 fixed on both sides of the reinforcing vertical plate 4. At this time, the limiting plates 30 fixed on both sides of the reinforcing vertical plate 4 will be close to both sides of the distribution beam 3, thereby limiting the reinforcing vertical plate 4 placed on the distribution beam 3 as a whole, so that the reinforcing vertical plate 4 can be accurately fixed at the corresponding position at the top of the distribution beam 3.

[0041] like Figure 4 , Figure 5 and Figure 7 As shown, the top clamping and limiting mechanism includes a cylinder 21, a first push plate 28, a second rack plate 26, a first rack plate 22, a second push plate 25, a connecting shaft 23, a gear 27, and a second connecting piece 19. The cylinder 21 is fixed to the inner wall of the placement groove 24. Guide grooves 18 are respectively opened on the inner walls of both sides of the placement groove 24. The first push plate 28 and the second push plate 25 are slidably connected to the inner walls of the placement groove 24 and the guide grooves 18, respectively. The second connecting piece 19 is fixed to the outer walls of both sides of the first push plate 28 and the second push plate 25, respectively. One outer wall of the first push plate 28 is fixed to the output shaft of the cylinder 21.

[0042] The connecting shaft 23 is rotatably connected to the bottom inner wall of the placement groove 24, the gear 27 is fixed to the outer wall of the connecting shaft 23, the first rack plate 22 is fixed to one side outer wall of the first push plate 28, the second rack plate 26 is fixed to one side outer wall of the second push plate 25, and the second rack plate 26 and the first rack plate 22 are respectively meshed with the gear 27.

[0043] When the elastic airbag 16 is compressed, the internal gas is injected into the cylinder 21 through the air supply pipe, thereby pushing the output shaft of the cylinder 21 forward. When the output shaft of the cylinder 21 moves forward, it pushes the first push plate 28 forward as a whole. When the first push plate 28 moves forward, it pushes the first rack plate 22 on one side forward, thereby pushing the second rack plate 26 to move in the opposite direction through the meshing gear 27 on one side. This pulls the second push plate 25 and the first push plate 28 to move relative to each other, so that the second connecting plates 19 on both sides of the second push plate 25 and the first push plate 28 clamp and fix the fixing block 14 on both sides of the top of the double-layer Bailey beam 6. At the same time, when the workers are hoisting the double-layer Bailey beam 6, the two first connecting plates 19 clamp and fix the fixing block 14 on both sides of the second push plate 25 and the first push plate 28. The gap between the two connecting pieces 19 will be large. At this time, the staff only needs to align the fixing block 14 at the bottom of the double-layer Bailey beam 6 with the first connecting piece 10 on one side of the reinforcing vertical plate 4, and then push the double-layer Bailey beam 6 towards the reinforcing vertical plate 4. At this time, the second connecting piece 19, which moves relative to each other, will slowly clamp the fixing block 14 close to the side of the reinforcing vertical plate 4. While clamping the fixing block 14, the position of the fixing block 14 on the side of the reinforcing vertical plate 4 will be automatically calibrated. Thus, the staff only needs to check the relative position between the fixing block 14 at the bottom of the double-layer Bailey beam 6 and the first connecting piece 10 to make the double-layer Bailey beam 6 vertically fixed on one side of the reinforcing vertical plate 4, thereby improving the installation efficiency of the double-layer Bailey beam 6.

[0044] like Figure 4-5 As shown, a locking block 20 is fixed to the top outer wall of the second connecting piece 19, and a conduit mounting groove 17 is opened on one side outer wall of the reinforcing vertical plate 4. The conduit mounting groove 17 passes through the inner wall of one side of the rectangular groove 9. The first rack plate 22 can cooperate with the second connecting piece 19 to clamp and fix the fixing block 14 located at the top of the double-layer Bailey beam 6. The conduit mounting groove 17 can limit and fix the air supply pipe connected between the cylinder 21 and the elastic airbag 16.

[0045] like Figure 1-7 As shown, the outer wall of the fixing block 14 has a first mounting hole 13, and the outer walls of the first connecting piece 10 and the second connecting piece 19 have second mounting holes 34 respectively; the worker can use screws to fix the fixing block 14 clamped on one side of the second connecting piece 19 and the first connecting piece 10 through the second mounting holes 34.

[0046] like Figure 3 As shown, extension plates 11 are fixed to the outer walls on both sides of the reinforcing vertical plate 4. The extension plates 11 can increase the width of the contact surface between the two sides of the reinforcing vertical plate 4 and the bottom of the double-layer Bailey beam 6, so that the fixing block 14 can slide left and right on one side of the first connecting piece 10 under the support of the extension plates 11, thereby facilitating the worker to adjust the position of the fixing block 14 at the bottom of the double-layer Bailey beam 6.

[0047] like Figure 6-7As shown, a fixing hole 31 is opened on the outer wall of one side of the reinforcing vertical plate 4, and a partition block 32 is fixed on the inner wall of the guide groove 18. The workers can use U-shaped buckles or other fixing tools through the fixing hole 31 to fix the reinforcing vertical plate 4 to the corresponding position on the top of the distribution beam 3. The partition block 32 can block and limit the second push plate 25 that is slidably connected to the inner wall of the guide groove 18.

[0048] like Figure 1-4 As shown, the outer walls on both sides of the reinforcing vertical plate 4 are respectively provided with reserved grooves 8, and the top outer wall of the reinforcing vertical plate 4 is provided with a sealing cover plate 7; the workers can conveniently hoist and transport the reinforcing vertical plate 4 through the reserved grooves 8.

[0049] In this embodiment, the worker first hoists the reinforcing vertical plate 4 onto the support frame consisting of the foundation 1, steel pipe column 2, sand box 5, and distribution beam 3. Then, the reinforcing vertical plate 4 is fixed to the corresponding position on the distribution beam 3 using U-shaped buckles and other fixing tools. Next, the double-layer Bailey beam 6 is hoisted onto one side of the reinforcing vertical plate 4, and the fixing block 14 on one side of the double-layer Bailey beam 6 is aligned with the first connecting piece 10 on one side of the reinforcing vertical plate 4. Then, the double-layer Bailey beam 6 is moved towards the reinforcing vertical plate 4 using hoisting equipment, so that the fixing block 14 is inserted into the first connecting piece 10 on one side of the reinforcing vertical plate 4. Finally, the fixing block 14 is fixed onto the first connecting piece 10 using bolts and other fixing tools, thus completing the installation of the double-layer Bailey beam 6 on one side of the reinforcing vertical plate 4.

[0050] The first connecting pieces 10 located on both sides of the reinforcing vertical plate 4 can guide and limit the double-layer Bailey beam 6 inserted on one side of the reinforcing vertical plate 4. At the same time, after the fixing block 14 is inserted into the first connecting piece 10, it will compress the elastic airbag 16 installed on the inner wall of the rectangular groove 9. At this time, while the elastic airbag 16 buffers the moving fixing block 14, the gas inside the compressed airbag will be filled into the top clamping and limiting mechanism through the air supply pipe, thereby pushing the top clamping and limiting mechanism to clamp the two fixing blocks 14 located at the top of the double-layer Bailey beam 6, and cooperate with the first connecting piece 10 to clamp and limit the double-layer Bailey beam 6 supported on one side of the reinforcing vertical plate 4.

[0051] Workers can adjust the position of the movable frame 29 on one side of the mounting slot 12 according to the size of the distribution beam 3, and then fix the movable frame 29 on the mounting slot 12 with screws. Workers can place the reinforcing vertical plate 4 on the distribution beam 3 as a whole through the two limiting plates 30 fixed on both sides of the reinforcing vertical plate 4. At this time, the limiting plates 30 fixed on both sides of the reinforcing vertical plate 4 will be close to both sides of the distribution beam 3, thereby limiting the reinforcing vertical plate 4 placed on the distribution beam 3 as a whole.

[0052] When the elastic airbag 16 is compressed, the gas inside will be injected into the cylinder 21 through the air supply pipe, thereby pushing the output shaft of the cylinder 21 to move forward. When the output shaft of the cylinder 21 moves forward, it will push the first push plate 28 to move forward as a whole. When the first push plate 28 moves forward, it will push the first rack plate 22 on one side to move forward, thereby pushing the second rack plate 26 to move in the opposite direction through the meshing gear 27 on one side, thereby pulling the second push plate 25 and the first push plate 28 to move relative to each other, so that the second connecting pieces 19 on both sides of the second push plate 25 and the first push plate 28 clamp and fix the fixing block 14 located on the top of the double-layer Bailey beam 6.

[0053] Example 2:

[0054] A double-layer Bailey beam support, such as Figure 5-7 As shown, this embodiment makes the following improvements based on embodiment 1: An elastic buffer block 33 is fixed to one side of the outer wall of the second rack plate 26; when the second push plate 25 and the first push plate 28 drive the second connecting piece 19 to clamp and fix the fixing block 14 against one side of the reinforcing vertical plate 4, the second rack plate 26 and the first rack plate 22 will also abut against the corresponding first push plate 28 and second push plate 25 respectively. At this time, the elastic buffer block 33 provided on one side of the first rack plate 22 and the second rack plate 26 will buffer the second rack plate 26 and the first rack plate 22 to avoid hard collision between the second rack plate 26 and the first rack plate 22 and the second push plate 25 and the first push plate 28.

[0055] In this embodiment, the elastic buffer block 33 provided on one side of the first rack plate 22 and the second rack plate 26 will buffer the second rack plate 26 and the first rack plate 22.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A double-layer Bailey beam support, comprising a support platform (1), characterized in that, The top outer wall of the foundation (1) is fixed with a steel pipe column (2), the top outer wall of the steel pipe column (2) is fixed with a sand box (5), the top outer wall of the sand box (5) is fixed with a distribution beam (3), the top outer wall of the distribution beam (3) is provided with a reinforcing vertical plate (4), the outer walls of both sides of the reinforcing vertical plate (4) are respectively fixed with multiple sets of first connecting pieces (10), the outer wall of one side of the first connecting piece (10) is inserted with a fixing block (14), the outer wall of the fixing block (14) is fixed with a double-layer Bailey beam (6); The top outer wall of the reinforcing vertical plate (4) has a placement groove (24), and the inner wall of the placement groove (24) is provided with a top clamping and limiting mechanism. The outer walls on both sides of the reinforcing vertical plate (4) each have a set of rectangular grooves (9), and the inner wall of the rectangular grooves (9) is provided with an elastic airbag (16). A baffle (15) is fixed on one side of the outer wall of the elastic airbag (16), and the elastic airbag (16) is connected to the top clamping and limiting mechanism through an air supply pipe.

2. The double-layer Bailey beam support according to claim 1, characterized in that, The reinforcing vertical plate (4) has mounting grooves (12) on both sides of its outer wall. A movable frame (29) is slidably connected to the inner wall of the mounting groove (12). The movable frame (29) is fixed to the inner wall of the mounting groove (12) by screws. A limit plate (30) is fixed to one side of the outer wall of the movable frame (29).

3. A double-layer Bailey beam support according to claim 1, characterized in that, The top clamping and limiting mechanism includes a cylinder (21), a first push plate (28), a second rack plate (26), a first rack plate (22), a second push plate (25), a connecting shaft (23), a gear (27), and a second connecting piece (19). The cylinder (21) is fixed on the inner wall of the placement groove (24). Guide slots (18) are opened on the inner walls of both sides of the placement groove (24). The first push plate (28) and the second push plate (25) are slidably connected to the inner walls of the placement groove (24) and the guide slots (18), respectively. The second connecting piece (19) is fixed on the outer walls of both sides of the first push plate (28) and the second push plate (25), respectively. One outer wall of the first push plate (28) is fixed on the output shaft of the cylinder (21). The connecting shaft (23) is rotatably connected to the bottom inner wall of the placement groove (24), the gear (27) is fixed to the outer wall of the connecting shaft (23), the first rack plate (22) is fixed to one side outer wall of the first push plate (28), the second rack plate (26) is fixed to one side outer wall of the second push plate (25), and the second rack plate (26) and the first rack plate (22) are respectively meshed with the gear (27).

4. A double-layer Bailey beam support according to claim 3, characterized in that, The second connecting piece (19) has a locking block (20) fixed on the top outer wall, and a conduit mounting groove (17) is opened on one side of the outer wall of the reinforcing vertical plate (4). The conduit mounting groove (17) passes through the inner wall of one side of the rectangular groove (9).

5. A double-layer Bailey beam support according to claim 1, characterized in that, The outer wall of the fixing block (14) has a first mounting hole (13), and the outer walls of the first connecting piece (10) and the second connecting piece (19) have second mounting holes (34).

6. A double-layer Bailey beam support according to claim 4, characterized in that, Extension plates (11) are fixed to the outer walls on both sides of the reinforcing vertical plate (4).

7. A double-layer Bailey beam support according to claim 6, characterized in that, The reinforcing vertical plate (4) has a fixing hole (31) on one side of its outer wall, and a partition block (32) is fixed on the inner wall of the guide groove (18).

8. A double-layer Bailey beam support according to claim 7, characterized in that, The outer walls on both sides of the reinforcing vertical plate (4) are respectively provided with reserved grooves (8).

9. A double-layer Bailey beam support according to claim 8, characterized in that, The top outer wall of the reinforcing vertical plate (4) is provided with a sealing cover plate (7).

10. A double-layer Bailey beam support according to claim 3, characterized in that, An elastic buffer block (33) is fixed on one side of the outer wall of the second rack plate (26).

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