A wet joint formwork assembly and method

Abstract

This invention provides a device and method for installing and dismantling wet joint templates. The device includes a cap beam, a box girder, and a wet joint template. An auxiliary rope is fixed to blocks on both sides of the cap beam. The auxiliary rope naturally curves downwards in the middle and is located below the box girder, serving to assist the wet joint template in sliding to one side of the bridge deck during removal. The wet joint template is equipped with paired hooks, rope fixing bars, rope holes, and ropes. The rope fixing bars are located at the rope holes, and the ropes pass through the holes and are attached to the fixing bars. The height of the wet joint template is adjusted by raising and lowering the ropes, and the template slides along the auxiliary ropes by adjusting the ends of the ropes. The method provided by this invention offers high construction efficiency, ensuring that personnel can work on the bridge deck without being affected by the terrain below the bridge, the height of the bridge piers, or whether the bridge crosses a river.

Description

Technical Field

[0001] This invention relates to the field of template installation and removal technology, specifically to a device and method for installing and removing wet joint templates. Background Technology

[0002] Currently, precast beams are widely used in bridge construction, manufactured centrally at beam yards and then transported to the site for installation. Wet joints between adjacent beams in the same span are typically constructed using suspended formwork, with the formwork lifted from under the bridge using a winch and lowered back down using the same winch. For bridges located in complex mountainous terrain, or those spanning railway lines or waterways, workers must be on-site to assist, making construction extremely inconvenient. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wet joint template installation and removal device and method. Workers can complete the installation and removal of wet joint templates on the bridge deck without the need for personnel to assist under the bridge. It is not affected by the site terrain, has strong practicality, and high construction efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A wet joint template installation and removal device includes a cap beam, a box girder, and a wet joint template. An auxiliary rope is fixed on the blocks on both sides of the cap beam. The auxiliary rope naturally droops down in the middle and is located below the box girder. It is used to assist the wet joint template in sliding to one side of the bridge deck when it is removed.

[0006] The wet joint template is equipped with a pair of hooks, rope fixing ribs, rope holes and ropes. The rope fixing ribs are located at the rope holes. The ropes pass through the rope holes and are tied to the rope fixing ribs. The height of the wet joint template is adjusted by raising and lowering the ropes, and the wet joint template slides along the auxiliary rope by adjusting the two ends of the ropes.

[0007] Furthermore, it also includes a fork pole, which is used to press down the auxiliary rope on one side of the bridge deck so that the two ends of the auxiliary rope form a certain angle. When the wet joint template slides to the fork pole, the hook on the fork pole is used to hook the hook and lift the wet joint template to the bridge deck.

[0008] Furthermore, the wet joint template is also provided with tie rod nuts, which are used to install tie rods to fix the wet joint template located above and below the box girder.

[0009] Furthermore, as the wet joint template slides along the auxiliary rope, the hook is attached to the auxiliary rope.

[0010] Furthermore, the auxiliary rope is a flexible thin rope.

[0011] The present invention also provides a method for installing and removing wet joint templates, comprising the following steps:

[0012] Step S1. Before installing the box girder, first install auxiliary ropes on the cap beam, with both ends of the auxiliary ropes tied to the stop blocks;

[0013] Step S2. Install the box girder;

[0014] Step S3. After all box girders have been hoisted, lower the wet joint template along the wet joint gap on the bridge deck using hoisting ropes, adjust the wet joint template and fix it.

[0015] Step S4. Untie the auxiliary rope on the stop block and tie the auxiliary rope to the top of the box girder on both sides;

[0016] Step S5. When removing the mold, first remove and fix the upper and lower molds of the wet joint, lower the lower wet joint mold and change it from horizontal to vertical, so that the lower wet joint mold is hung on the auxiliary rope.

[0017] Step S6. Untie the auxiliary rope on one side of the bridge deck and press down with a fork to slowly loosen the auxiliary rope so that it forms a certain angle. The wet joint template slides along the auxiliary rope to one side of the bridge deck under its own weight.

[0018] Step S7. When the wet joint template slides to the fork, use the hook of the fork to hook the hook and lift it to the bridge deck;

[0019] Step S8. Untie the auxiliary rope, move to the next wet joint template position, and repeat the above steps until all wet joint templates are removed.

[0020] Furthermore, in step S1, the natural downward deflection of the auxiliary rope in the middle does not affect the installation of the box girder.

[0021] Furthermore, in step S4, the suspension rope within the wet joint area is threaded through a plastic tube for protection to prevent it from being encased in concrete.

[0022] Furthermore, the specific process in step S5 is as follows: the wet joint template is lowered by the suspension rope. When the wet joint template comes into contact with the auxiliary rope, the template is slid along the auxiliary rope by adjusting the two suspension ropes, changing from a horizontal to a vertical state, so that the hook is hung on the auxiliary rope.

[0023] Furthermore, in step S6, during the sliding process of the wet joint template, the hook is prevented from coming off by traction with a suspension rope.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention provides a method for installing and removing wet joint templates on bridge decks. Compared with traditional winch hoisting, workers can complete the installation and removal of wet joint templates on the bridge deck without the need for personnel to cooperate under the bridge. It is not affected by the site terrain, has strong practicality and high construction efficiency. (2) The hooks set at the bottom of the template can be hung on the auxiliary rope, and the template can slide along the inclined auxiliary rope under its own weight. (3) The two hooks set at the bottom of the template can improve the success rate of the template being hung on the auxiliary rope. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the auxiliary rope installation in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the box girder installation in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the wet joint template structure in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the process below the wet joint template in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the installation of the wet joint template according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the removal of the wet joint template in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the wet joint template sliding down the auxiliary rope in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the wet joint template sliding to the bridge edge in an embodiment of the present invention.

[0034] Among them, 101-cap beam, 102-stop block, 103-support pad stone; 20-auxiliary rope; 30-box beam; 401-wet joint template, 402-hook, 403-pull rod nut, 404-lifting rope fixing bar, 405-lifting rope hole, 406-lifting rope; 50-fork rod. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0036] It should be understood that the terms "length", "width", "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 the embodiments of the present 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 the present invention.

[0037] In the description of this invention, unless otherwise stated, the term "connection" should be interpreted broadly, and may refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The implementation process of the present invention will be further described in detail below with reference to specific accompanying drawings and examples.

[0039] Example 1

[0040] To address the deficiencies in the prior art, this invention provides a wet joint formwork installation and removal device, comprising a cap beam, a box girder 30, and a wet joint formwork 401, as follows: Figure 1-2 As shown, auxiliary ropes 20 are fixed on the blocks 102 on both sides of the cap beam 101. The auxiliary ropes 20 naturally droop downward in the middle and are located below the box girder 30. They are used to help the wet joint template 401 slide to one side of the bridge deck when it is removed. Support pads 103 are provided above the cap beam 101.

[0041] like Figure 3 As shown, the wet joint template 401 is provided with a pair of hooks 402, rope fixing ribs 404, rope holes 405 and ropes 406. The rope fixing ribs 404 are located at the rope holes 405. The rope passes through the rope holes 405 and is tied to the rope fixing ribs 404. The height of the wet joint template is adjusted by lifting and lowering the ropes, and the wet joint template slides along the auxiliary rope 20 by adjusting the two ends of the ropes.

[0042] In the above embodiment, the auxiliary rope 20 is a flexible thin rope, the length of which is determined according to the site requirements. Two sets of hooks 402 and 402, tie rod nuts 403, rope fixing ribs 404, rope holes 405, and ropes 406 are each provided on the wet joint template. One end of the hook 402 is fixed to the template 401, and the other end is bent at 90°. The tie rod nut 403 is fixed to the template 401, and the tie rod can pass through the template and the tie rod nut 403 to tighten and fix the template. A U-shaped rope fixing rib 404 is provided at the rope hole 405, and the rope 406 passes through the rope hole and is tied to the fixing rib 404. The wooden template 401 is lifted, lowered, and adjusted using the rope 406. The rope 406 within the wet joint area is protected with a plastic tube to prevent it from being encased in concrete, facilitating the lowering of the template. Marks are made on both sides of the bridge deck according to the installation position of each wet joint template 401 to facilitate the movement of the auxiliary rope 20 between the two hooks 402.

[0043] Example 2

[0044] Example 2 provides a method for installing and removing wet joint templates, including the following steps:

[0045] Step S1. Before installing the box girder 30, first install auxiliary ropes on the cap beam 101, with both ends of the auxiliary ropes tied to the stop block 102;

[0046] Step S2. Install box girder 30;

[0047] Step S3. After all box girders 30mm thick have been hoisted, lower the wet joint template along the wet joint gap on the bridge deck using hoisting ropes, adjust and fix the wet joint template, as shown. Figure 4 As shown;

[0048] Step S4. Untie the auxiliary rope on the stop block 102 and tie the auxiliary rope to the top of the box beams 30 on both sides;

[0049] Step S5. Figure 6 As shown, when dismantling the formwork, first remove and fix the formwork above and below the wet joint, then lower the lower wet joint formwork using the hoisting rope 406 and change it from horizontal to vertical, so that the hook 402 of the lower wet joint formwork is hung on the auxiliary rope 20.

[0050] Step S6. Figure 7 As shown, untie the auxiliary rope on one side of the bridge deck and press down with a fork pole at 50 degrees, slowly loosening the auxiliary rope to create a certain angle. The wet joint template will then slide along the auxiliary rope to one side of the bridge deck under its own weight. Figure 8 As shown;

[0051] Step S7. When the wet joint template slides to the fork 50, use the hook of the fork 50 to hook the hook 402 and lift it to the bridge deck;

[0052] Step S8. Untie the auxiliary rope, move to the next wet joint template position, and repeat the above steps until all wet joint templates are removed.

[0053] In the above embodiments, such as Figure 5 As shown, during the pouring of the wet joint, the wet joint reinforcement is installed, and tie rods and tie rod protective tubes are installed to fix the wet joint formwork 401. The lifting rope 406 within the wet joint area is threaded through the plastic tube, and then the wet joint concrete is poured. During formwork removal, the tie rods are removed first. In step S7, during the sliding process of the wet joint formwork 401, the lifting rope 406 is used to pull it to prevent it from disengaging.

[0054] In summary, the present invention provides a method for installing and dismantling wet joint formwork on bridge decks. Compared to traditional winch hoisting, workers can complete the installation and dismantling of wet joint formwork on the bridge deck without the need for personnel to assist below the bridge. It is unaffected by the terrain and is highly practical with high construction efficiency. The hooks 402 at the bottom of the formwork can be attached to auxiliary ropes, allowing the formwork to slide along the inclined auxiliary ropes under its own weight. The two hooks at the bottom of the formwork increase the success rate of attaching it to the auxiliary ropes.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the content of this specification should be included within the protection scope of the present invention.

Claims

1. A method for installing and removing wet joint templates, characterized in that, A wet joint template installation and removal device is used to install and remove the wet joint template. The wet joint template installation and removal device includes a cap beam, a box beam, and a wet joint template. An auxiliary rope is fixed on the blocks on both sides of the cap beam. The auxiliary rope naturally droops down in the middle and is located below the box beam. It is used to help the wet joint template slide to one side of the bridge deck when it is removed. The wet joint template is equipped with a pair of hooks, rope fixing ribs, rope holes and ropes. The rope fixing ribs are located at the rope holes. The ropes pass through the rope holes and are tied to the rope fixing ribs. The height of the wet joint template is adjusted by lifting and lowering the ropes. The wet joint template can also slide along the auxiliary rope by adjusting the two ends of the ropes. The method includes the following steps: Step S1. Before installing the box girder, first install auxiliary ropes on the cap beam, with both ends of the auxiliary ropes tied to the stop blocks; Step S2. Install the box girder; Step S3. After all box girders have been hoisted, lower the wet joint template along the wet joint gap on the bridge deck using hoisting ropes, adjust the wet joint template and fix it. Step S4. Untie the auxiliary rope on the stop block and tie the auxiliary rope to the top of the box girder on both sides; Step S5. When removing the mold, first remove and fix the upper and lower molds of the wet joint, lower the lower wet joint mold and change it from horizontal to vertical, so that the lower wet joint mold is hung on the auxiliary rope. Step S6. Untie the auxiliary rope on one side of the bridge deck and press down with a fork to slowly loosen the auxiliary rope so that it forms a certain angle. The wet joint template slides along the auxiliary rope to one side of the bridge deck under its own weight. Step S7. When the wet joint template slides to the fork, use the hook of the fork to hook the hook and lift it to the bridge deck; Step S8. Untie the auxiliary rope, move to the next wet joint template position, and repeat the above steps until all wet joint templates are removed.

2. The method for installing and removing wet joint templates according to claim 1, characterized in that, In step S1, the natural downward deflection of the auxiliary rope in the middle does not affect the installation of the box girder.

3. The method for installing and removing wet joint templates according to claim 1, characterized in that, In step S4, the suspension rope within the wet joint area is threaded through a plastic tube for protection to prevent it from being encased in concrete.

4. The method for installing and removing wet joint templates according to claim 1, characterized in that, The specific process in step S5 is as follows: the wet joint template is lowered by the suspension rope. When the wet joint template comes into contact with the auxiliary rope, the template is slid along the auxiliary rope by adjusting the two suspension ropes, changing from a horizontal to a vertical state, so that the hook is hung on the auxiliary rope.

5. The method for installing and removing wet joint templates according to claim 1, characterized in that, In step S6, during the sliding process of the wet joint template, it is prevented from detaching by traction with a suspension rope.

6. The method for installing and removing a wet joint template according to claim 1, characterized in that, The wet joint template is also equipped with tie rod nuts, which are used to install tie rods to fix the wet joint template located above and below the box girder.

7. The method for installing and removing a wet joint template according to claim 1, characterized in that, The auxiliary rope is a flexible thin rope.

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