Assembly type bridge wet joint bottom die moving device and method

Abstract

An assembled bridge wet joint bottom die moving device and method, relate to the field of bridge construction. The assembled bridge wet joint bottom die moving device comprises a formwork panel arranged between the flange plates of two beam bodies, at least two slide rods connected to the bottom of the formwork panel, a plurality of connecting components capable of supporting the slide rods, and a driving component capable of driving the formwork panel to move along the length direction of the beam body. The slide rods extend along the length direction of the beam body. Each connecting component comprises a support seat for supporting the slide rod, a tensioning screw rod penetrating through the support seat, and two nuts connected to the two ends of the tensioning screw rod. The nuts connected to the bottom of the tensioning screw rod are fixed to the bottom of the support seat. The tensioning screw rod penetrates through the corresponding flange plate of a beam body, and the nut connected to the top end of the tensioning screw rod presses against the top surface of the corresponding beam body. The assembled bridge wet joint bottom die moving device and method can quickly and efficiently pour wet joint concrete for the bridge, and has the advantages of low cost, recyclable use, saving of construction resources, good safety, and good economic benefits.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and more specifically, to a device and method for moving the bottom formwork of wet joints in prefabricated bridges. Background Technology

[0002] The construction period for bridges is typically 1-2 years. To shorten the construction cycle, precast box girders are commonly used, as their simple and rapid installation significantly improves construction efficiency. In contrast, highways built in mountainous areas often have a high bridge-to-tunnel ratio, making precast T-beams, which offer better economic efficiency and ease of installation, the preferred beam-slab structure for highway bridges. In both types of bridge construction, a crucial step in ensuring the beams are connected as a whole for optimal bridge performance is the construction of wet joints. The quality of these wet joints directly impacts the bridge's stress distribution, functionality, and even its lifespan; therefore, the quality of wet joint construction significantly influences the overall quality of the bridge project.

[0003] The construction of wet joints requires the installation and removal of formwork. Although the amount of work is small, the operators are working at heights and often cross complex areas such as urban roads, highways, rivers, and mountains. The labor intensity is high, the work efficiency is low, and it is difficult to quickly rescue in case of an accident. Safety is not easy to control. Currently, the main construction methods for wet joints are: 1. Constructing a construction platform at the bottom of the beam, with workers climbing ladders from the top of the beam to the platform below. This method is cumbersome for formwork installation, dismantling, and relocation, and has low efficiency and high cost. Construction is also difficult if the space under the bridge is limited. 2. Workers are suspended from the gaps in the wet joints on the beam surface by ropes to work below the beam. Workers on the beam surface then fix each formwork piece to the reinforcing steel bars of the wet joint with cables. The workers on the beam surface adjust the cables to precisely position the formwork and secure it with tie rods. This method is low-cost but difficult to operate: 1. Workers below the beam surface are only supported by one rope, resulting in a large workload and complicated procedures. Prolonged suspended work poses significant safety risks. 2. Delivering assembled formwork to workers on the beam surface using only ropes is difficult, and there are significant safety hazards if there are vehicles or boats operating below the construction site.

[0004] Therefore, a safe and reliable construction tool and method are needed to solve the problems of high difficulty and high risk in the installation and dismantling of wet joint formwork for bridges. Summary of the Invention

[0005] The purpose of this application is to provide a prefabricated bridge wet joint bottom formwork moving device and method, which can quickly and efficiently pour concrete for bridge wet joints, and has the advantages of low cost, reusability, saving construction resources, good safety and good economic benefits.

[0006] This application is implemented as follows:

[0007] This application provides a movable device for the bottom formwork of a prefabricated bridge wet joint, which includes a template panel disposed between the flange plates of two beams, at least two sliding rods connected to the bottom of the template panel, a plurality of connecting components for supporting the sliding rods, and a driving component for driving the template panel to move along the length direction of the beam. The sliding rods extend along the length direction of the beam. Each connecting component includes a support seat for supporting the sliding rod, a tie rod threaded through the support seat, and two nuts respectively connected to the two ends of the tie rod. The nuts connected to the bottom of the tie rods are fixedly disposed at the bottom of the support seat. The tie rods pass through the flange plate corresponding to one beam, and the nuts connected to the top of the tie rods press against the top surface of the corresponding beam.

[0008] In some alternative implementations, the connecting components include sleeves respectively fitted onto each tie rod, the sleeves being embedded in the corresponding flange.

[0009] In some alternative implementations, the top of the support base is connected to baffles located on both sides of the slide rod.

[0010] In some alternative implementations, a T-shaped locking block is connected to the top of the support base, and a T-shaped sliding groove extending along the length of the slide rod is provided at the bottom of the slide rod, with the locking block slidably disposed in the corresponding sliding groove.

[0011] In some alternative implementations, the bottom of the template panel is connected to multiple square timbers spaced apart along the length of the beam, each square timber extending along the width of the beam, with the bottom ends of each square timber connected to two sliding rods respectively.

[0012] In some alternative implementations, adhesive strips extending along the length of the beam are connected to the top surfaces of both sides of the template panel.

[0013] In some alternative implementations, the drive assembly includes at least two winches, at least two pulleys, and at least two traction cables, each winch being connected to a slide bar via a traction cable, and each traction cable being wound around at least one pulley.

[0014] This application also provides a method for moving the bottom formwork of a prefabricated bridge wet joint, which is carried out using the above-mentioned prefabricated bridge wet joint bottom formwork moving device, and includes the following steps:

[0015] Multiple connecting components are used to support the template panel between the flanges of the two beams. The tie rods of each connecting component pass through the corresponding flanges and support seats of the two beams, and the two ends are fixed to the beams by nuts. The support seats of each connecting component support the sliding rods connected to the bottom of the template panel.

[0016] After pouring the Nth wet joint concrete between the two beams and the formwork panel and meeting the demolding requirements, loosen the nuts connected to the top of each connecting component, so that the tie rods of each connecting component can be lowered and the formwork panel can be lowered and detached from the Nth wet joint concrete.

[0017] The template panel is moved along the length of the beam using a drive assembly, and then moved to the N+1th wet joint concrete section and supported by multiple connecting assemblies. The above steps are repeated to pour the wet joint concrete for each section in sequence.

[0018] In some alternative implementations, when the formwork panel is moved below the N+1th wet joint concrete, the various connecting components that supported the formwork panel during the pouring of the Nth wet joint concrete are disassembled and reinstalled on the two flanges to support the formwork panel during the pouring of the N+2th wet joint concrete.

[0019] The beneficial effects of this application are as follows: The prefabricated bridge wet joint bottom formwork moving device provided by this application includes a formwork panel located between the flange plates of two beams, at least two sliding rods connected to the bottom of the formwork panel, multiple connecting components for supporting the sliding rods, and a driving component for driving the formwork panel to move along the length direction of the beam. The sliding rods extend along the length direction of the beam. Each connecting component includes a support seat for supporting the sliding rod, a tie rod threaded through the support seat, and two nuts respectively connected to both ends of the tie rod. The nuts connected to the bottom of the tie rods are fixed to the bottom of the support seat. The tie rods pass through the flange plate corresponding to one beam, and the nuts connected to the top of the tie rods press against the top surface of the corresponding beam. The prefabricated bridge wet joint bottom formwork moving device and method provided in this application can quickly and conveniently complete the installation of the formwork support structure with the beam to achieve positioning, material transfer and support fixation, thereby enabling rapid and efficient concrete pouring of bridge wet joints. It has the advantages of low cost, reusability, saving construction resources, good safety and good economic benefits, and avoids the danger of falling objects injuring people when construction workers are working simultaneously from above and below the bridge. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A partial cross-sectional view of the prefabricated bridge wet joint bottom formwork moving device provided in the embodiment of this application, installed between two beams;

[0022] Figure 2for Figure 1 Enlarged schematic diagram of a local structure in the middle;

[0023] Figure 3 A partial cross-sectional view of the prefabricated bridge wet joint bottom formwork moving device provided in this application embodiment, installed between two beams;

[0024] Figure 4 A partial cross-sectional view of the prefabricated bridge wet joint bottom formwork moving device provided in the embodiment of this application, installed between two beams and with wet joint concrete poured.

[0025] Figure 5 A partial cross-sectional view of the prefabricated bridge wet joint bottom formwork moving device provided in this application embodiment, installed between two beams and with wet joint concrete poured.

[0026] Figure 6 A schematic diagram illustrating the pouring of the first wet joint concrete in the method for moving the bottom formwork of a prefabricated bridge wet joint provided in this application embodiment;

[0027] Figure 7 This is a schematic diagram of the installation of connecting components at the corresponding flange plate of the second wet joint concrete after the first wet joint concrete is poured in the prefabricated bridge wet joint bottom formwork moving method provided in the embodiments of this application.

[0028] Figure 8 A schematic diagram illustrating the method for moving the bottom formwork of a prefabricated bridge wet joint in an embodiment of this application, which uses a drive assembly to pull the formwork panel from below the first wet joint concrete to between the corresponding flange plates of the second wet joint concrete to be poured.

[0029] Figure 9 This is a schematic diagram illustrating the use of a drive assembly to pull a template panel from below the first wet joint concrete to between the corresponding flange plates of the second wet joint concrete to be poured, in the method for moving the bottom formwork of a prefabricated bridge wet joint provided in this application embodiment.

[0030] Figure 10 This is a schematic diagram showing the method for moving the bottom formwork of a prefabricated bridge wet joint, provided in an embodiment of this application, after the driving component pulls the formwork panel from below the first wet joint concrete to between the corresponding flange plates of the second wet joint concrete to be poured.

[0031] In the diagram: 100, template panel; 110, adhesive strip; 120, slide bar; 121, slide groove; 130, connecting assembly; 140, support base; 141, locking block; 150, tie rod; 160, nut; 170, sleeve; 180, baffle; 190, square timber; 200, beam; 210, flange plate; 220, wet joint concrete; 300, drive assembly; 310, winch; 320, pulley; 330, traction cable. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The features and performance of the prefabricated bridge wet joint bottom formwork moving device and method of this application are further described in detail below with reference to the embodiments.

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this application provides a prefabricated bridge wet joint bottom formwork moving device, which includes a formwork panel 100, square timbers 190 spaced apart and connected to the bottom of the formwork panel 100, two sliding rods 120, a connecting component 130 spaced apart, and a driving component 300 for driving the formwork panel 100 to move along the length direction of the beam 200.

[0041] The template panel 100 is located between the flange plates 210 of the two beams 200. The top surfaces of both sides of the template panel 100 are respectively connected to adhesive strips 110 extending along the length of the beam 200. The square timbers 190 are arranged at intervals along the length of the beam 200. Each square timber 190 extends along the width of the beam 200. Two sliding rods 120 extend along the length of the beam 200 and are respectively connected to one bottom end of each square timber 190.

[0042] Each connecting component 130 is symmetrically arranged between two beams 200. Each connecting component 130 includes a support seat 140 for supporting the slide rod 120, a tie rod 150 threaded through the support seat 140, two nuts 160 respectively connected to the two ends of the tie rod 150, and a sleeve 170 sleeved on the tie rod 150. The nuts 160 connected to the bottom of the tie rod 150 are fixedly connected to the bottom of the support seat 140. The support seat 140 is provided with threaded holes for threaded connection with the tie rod 150. The tie rod 150 of each connecting component 130 passes through the corresponding flange plate 210 below a beam 200. The nuts 160 connected to the top of the tie rod 150 press against the top surface of the corresponding beam 200. The sleeve 170 is embedded in the corresponding flange plate 210. The top of the support seat 140 is connected to baffles 180 respectively provided on both sides of the slide rod 120. The top of the support base 140 is connected to a T-shaped locking block 141, and the bottom of the slide rod 120 is provided with a T-shaped slide groove 121 extending along its length direction. The locking block 141 is slidably disposed in the corresponding slide groove 121.

[0043] The drive assembly 300 includes two winches 310 connected to the top of the beam 200, two pulleys 320 connected to the end crossbeams of the beam 200, and two traction cables 330. Each winch 310 is connected to a slide bar 120 through the traction cable 330, and each traction cable 330 is wound around a pulley 320.

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown in the figure, this application embodiment also provides a method for moving the bottom formwork of a prefabricated bridge wet joint, which is carried out using the above-mentioned prefabricated bridge wet joint bottom formwork moving device, including the following steps:

[0045] Step 1: When constructing the corresponding flange plates 210 below the two beams 200, pre-embed sleeves 170 arranged at intervals along the length of the beam 200 in the two flange plates 210 respectively.

[0046] Step 2: Use the spaced connecting components 130 to support the template panel 100 between the flange plates 210 of the two beams 200. Specifically, first, pass the tie rods 150 of each connecting component 130 through the sleeves 170 pre-embedded in the flange plate 210, and suspend each tie rod 150 from the two beams 200 by the nuts 160 connected at the top. Then, fit each support seat 140 on the top of each tie rod 150, and connect and fix each support seat 140 to the tie rod 150 by the nuts 160 connected at the bottom of the tie rod 150. Next, suspend the template panel 100 between the flange plates 210 of the two beams 200, and let the support seats 140 connected to each tie rod 150 support the two sliding rods 120 connected to the bottom sides of the tie rod 150 respectively. At this time, the two sides of the template panel 100 and the two beams 200 are sealed together.

[0047] Step 2: After pouring the Nth wet joint concrete 220 between the two beams 200 and the formwork panel 100 and meeting the demolding requirements, rotate the nuts 160 connected to the top of the tie rods 150 of each connecting component 130, so that the tie rods 150 of each connecting component 130 descend and drive the formwork panel 100 supported by the support base 140 to descend and detach from the Nth wet joint concrete 220, where N is a positive integer greater than or equal to 1; in this embodiment, N is 1.

[0048] Step 3: Connect the tie rods 150 of each connecting component 130 to the corresponding flange plate 210 below the N+1th wet joint concrete 220 between the two beams 200, so that each tie rod 150 is suspended from the two beams 200 by the nuts 160 connected at the top. Then, put each support seat 140 on the top of each tie rod 150, and connect and fix each support seat 140 to the tie rod 150 by the nuts 160 connected at the bottom of the tie rod 150.

[0049] Step 4: Use the drive assembly 300 to drive the template panel 100 to move along the length of the beam 200. Specifically, use two winches 310 to drive two traction steel cables 330 to wind up and pull two slide bars 120 to move axially, thereby moving the template panel 100 along the length of the beam 200 until the template panel 100 moves to below the N+1th wet joint concrete 220 and is supported by the support seat 140 in the connecting assembly 130 connected in Step 3. Repeat Steps 2 to 4 above to pour each section of wet joint concrete 220 in sequence.

[0050] When the template panel 100 is moved to the position below the N+1th wet joint concrete 220, the connecting components 130 that support the template panel 100 during the pouring of the Nth wet joint concrete 220 are disassembled and reinstalled on the two flange plates 210 to support the template panel 100 during the pouring of the N+2th wet joint concrete 220.

[0051] The prefabricated bridge wet joint bottom formwork moving device and method provided in this application embodiment, by setting a connecting component 130 connected to the beam 200 and the flange plate 210, allows the tie rod 150 of the connecting component 130 to be hung on the beam 200 through the nut 160 to support the support seat 140 to lift the formwork panel 100, and allows the formwork panel 100 to be raised and lowered between the flange plates 210 below the two beams 200. This ensures that the formwork panel 100 is stably stressed and cooperates with the two beams 200 to pour wet joint concrete 220. At the same time, it provides a larger operating space for the construction of wet joint concrete 220, facilitates the vibration of wet joint concrete 220 during construction, and can effectively vibrate the wet joint concrete 220 into place, ensuring the quality of the finished product of wet joint concrete 220 construction. Meanwhile, two sliding rods 120 extending along the length of the beam 200 are connected to the bottom of the template panel 100. After a section of wet joint concrete 220 is poured, the winch 310 in the drive assembly 300 can be used to wind up the traction cable 330 to move the two sliding rods 120 and the template panel 100 along the length of the beam 200 for transportation. The moving template panel 100 is supported and fixed by the connecting assembly 130 connected to the beam 200 and the flange plate 210. This allows for quick and convenient movement and overall installation of the template panel 100, solving and optimizing the problems of difficult operation and high risk caused by complex environments such as rivers and rugged terrain under the beam 200. It directly eliminates the material and labor costs of installing a high-altitude work platform under the beam and coordinating with personnel at different levels, and can complete the template installation work efficiently and safely.

[0052] The top surfaces of both sides of the formwork panel 100 are respectively connected to adhesive strips 110 extending along the length of the beam 200. The adhesive strips 110 enable the two sides of the formwork panel 100 to make closer contact with the flanges 210 below the two beams 200, which can prevent grout leakage when pouring wet joint concrete 220. This is because the tightness of contact between soft and hard materials is better than that between two hard materials. The bottom of the formwork panel 100 is connected to two sliding rods 120 by spaced square timbers 190. The 90 square timbers are spaced apart along the length of the beam 200, and each square timber 190 extends along the width of the beam 200. This ensures that the template panel 100 is evenly stressed when the wet joint concrete 220 is poured, preventing deformation of the template panel 100 during pouring and ensuring close contact between the template panel 100 and the flange plate 210 of the beam 200. The tie rod 150 is fitted with a sleeve 170 pre-embedded in the flange plate 210, which facilitates the installation and removal of the tie rod 150 by passing it through or pulling it out of the sleeve 170.

[0053] The top of the support base 140 is connected to a T-shaped locking block 141, and the bottom of the slide rod 120 is provided with a T-shaped slide groove 121 extending along its length. The locking block 141 is slidably disposed in the corresponding slide groove 121. When the slide rod 120 and the template panel 100 move along the length of the beam 200, the locking block 141 moves along the slide groove 121. Thus, the position is limited by the sliding engagement between the locking block 141 connected to the support base 140 and the slide groove 121 provided on the bottom wall of the slide rod 120. The top of the support base 140 is connected to baffles 180 respectively provided on both sides of the slide rod 120, which can be used to further stop and limit the position of the slide rod 120.

[0054] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A movable device for the bottom formwork of a prefabricated bridge wet joint, characterized in that, It includes a template panel located between the flanges of two beams, at least two sliding rods connected to the bottom of the template panel, multiple connecting components for supporting the sliding rods, and a driving component for driving the template panel to move along the length of the beams. The sliding rods extend along the length of the beams. Each connecting component includes a support base for supporting the sliding rod, a tie rod threaded through the support base, and two nuts respectively connected to both ends of the tie rod. The nuts connected to the bottom of the tie rods are fixed to the bottom of the support base. The tie rods pass through a flange corresponding to one of the beams, and the nuts connected to the top of the tie rods press against the top surface of the corresponding beam.

2. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The connecting assembly includes sleeves respectively fitted onto each of the tie rods, and the sleeves are pre-embedded in the corresponding flange plates.

3. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The top of the support base is connected to baffles located on both sides of the slide rod.

4. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The top of the support base is connected to a T-shaped locking block, and the bottom of the slide rod is provided with a T-shaped sliding groove extending along its length direction. The locking block is slidably disposed in the corresponding sliding groove.

5. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The bottom of the template panel is connected to multiple square timbers arranged at intervals along the length of the beam. Each square timber extends along the width of the beam, and the bottom ends of each square timber are connected to two sliding rods respectively.

6. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The top surfaces of both sides of the template panel are respectively connected with adhesive strips extending along the length of the beam.

7. The prefabricated bridge wet joint bottom formwork moving device according to claim 1, characterized in that, The drive assembly includes at least two winches, at least two pulleys, and at least two traction cables. Each winch is connected to a slide bar via the traction cable, and each traction cable is wound around at least one pulley.

8. A method for moving the bottom formwork of a wet joint in a prefabricated bridge, characterized in that, It is carried out using the prefabricated bridge wet joint bottom formwork moving device as described in any one of claims 1-7, and includes the following steps: Multiple connecting components are used to support the template panel between the flanges of the two beams. The tie rods of each connecting component pass through the corresponding flanges and support seats of the two beams, and are then fixed to the beams by nuts at both ends. The support seats of each connecting component support the sliding rod connected to the bottom of the template panel. After pouring the Nth wet joint concrete between the two beams and the template panel and meeting the demolding requirements, loosen the nuts connected to the top of each of the connecting components, so that the tie rods of each of the connecting components descend and drive the template panel to descend and detach from the Nth wet joint concrete. The template panel is driven to move along the length of the beam using a drive assembly, so that the template panel is moved to the N+1th wet joint concrete section and supported by multiple connecting assemblies. The above steps are repeated to pour the wet joint concrete of each section in sequence.

9. The method for moving the bottom formwork of wet joints in prefabricated bridges according to claim 8, characterized in that, When the template panel is moved to the position below the N+1th wet joint concrete, the connecting components that supported the template panel during the pouring of the Nth wet joint concrete are disassembled and reinstalled on the two flange plates to support the template panel during the pouring of the N+2th wet joint concrete.

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