Prefabricated box girder formwork with drainage channel

Abstract

The utility model relates to a prefabricated box girder template with a drainage channel, which comprises a bottom die, side dies and end dies, the bottom of the bottom die is connected to a lifting platform through a hydraulic cylinder, the side dies on the left side and the right side are fixedly connected through opposite-pull screws penetrating through the lifting platform left and right, and the end dies on the front side and the rear side are fixedly connected through opposite-pull screws penetrating through the side dies front and back. A plurality of sets of drainage pipe fittings are arranged above the side die in the front-back direction at intervals, a plurality of sets of positioning holes are formed above the side die in the front-back direction at intervals, the hole diameter of the positioning holes is matched with the bottoms of the drainage pipe fittings, the drainage pipe fittings are vertically inserted into the positioning holes, and the bottoms of the drainage pipe fittings extend into the hole bottoms of the positioning holes. The top of the drainage pipe fitting is flush with the top of the side mold, the drainage pipe fitting comprises a drainage pipe and an anti-seepage sleeve, the anti-seepage sleeve is arranged at the upper end and the lower end of the drainage pipe in a matched and sleeved mode, the drainage pipe is pre-buried in the formed prefabricated box girder, box girder punching operation does not need to be conducted additionally, the labor cost is saved, and the construction efficiency of the drainage pipe of the box girder is improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a precast box girder formwork with drainage channels. Background Technology

[0002] Poor drainage on the bridge deck can cause wheel slippage, reduce the bridge's traffic capacity, and cause a series of water-related damage phenomena, thus affecting driving safety. Therefore, to ensure driving safety, the bridge drainage system should have sufficient drainage capacity to ensure that the water depth in the driving lane at the bridge deck cross section is not so deep as to cause wheel slippage. In order to quickly remove water from the bridge deck and prevent rainwater from accumulating on the bridge deck and seeping into the beams, thus affecting the bridge's durability, in addition to setting longitudinal and transverse slope drainage, a certain number of drainage pipes need to be installed on the bridge deck during the bridge design to form a complete drainage system.

[0003] The existing bridge drainage pipes are usually installed by drilling holes in the finished bridge deck after the bridge deck construction is completed. This is time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a precast box girder formwork with drainage channels that can be precast and avoids the need for additional positioning and drilling.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a precast box girder formwork with drainage channels, including a bottom formwork, side formwork and end formwork, wherein the bottom of the bottom formwork is connected to the lifting platform by a hydraulic cylinder;

[0006] The side molds on the left and right sides are fixedly connected by tie rods that run through the lifting platform on the left and right sides;

[0007] The end molds on the front and rear sides are fixedly connected by tie rods that pass through the front and rear side molds;

[0008] Several sets of drainage pipes are spaced apart above the side mold along the front-to-back direction.

[0009] The beneficial effects of the above technical solution are as follows: by setting drainage pipes on the side molds of the precast box girder formwork, drainage pipes can be pre-embedded in the formed precast box girder, eliminating the need for additional box girder drilling operations, saving labor costs, and improving the construction efficiency of the box girder drainage pipes; at the same time, by setting a hydraulic lifting device below the bottom mold of the box girder, after the box girder is formed in the precast mold, the formed box girder can be easily removed from the precast mold by hydraulic lifting, simplifying the demolding method of the precast box girder formwork and improving the precast efficiency of the box girder.

[0010] Furthermore, several sets of positioning holes are spaced apart on the upper part of the side mold along the front-to-back direction, and the diameter of the positioning holes is adapted to the bottom of the drainage pipe fitting.

[0011] Beneficial effects: The positioning holes can locate the pre-embedded position of the drainage pipes in the box girder, and at the same time help to fix the drainage pipes, ensuring the pre-embedded effect of the drainage pipes in the formed box girder.

[0012] Furthermore, the drainage pipe is vertically inserted into the positioning hole, with the bottom of the drainage pipe extending into the bottom of the positioning hole and the top of the drainage pipe flush with the top of the side mold.

[0013] Beneficial effects: Ensures that the drainage pipes are vertically installed inside the precast box girder, and at the same time ensures that the top of the formed drainage pipe is flush with the surface of the box girder, thus meeting the requirements for bridge deck drainage.

[0014] Furthermore, the drainage pipe fitting includes a drainage pipe and a seepage-proof sleeve, with the seepage-proof sleeve adapted to be installed at both ends of the drainage pipe.

[0015] Beneficial effects: The anti-seepage sleeve can prevent concrete from entering the interior of the drainage pipe fitting during concrete pouring, ensuring the drainage effect after the drainage pipe fitting is formed.

[0016] Furthermore, the drain pipe has a diameter that is thicker at the top and thinner at the bottom, with a tapering structure between the thick and thin pipes, and the upper end of the thick pipe has a drain mesh structure.

[0017] Beneficial effects: The mesh structure of the floor drain can filter out larger solid debris, reducing the occurrence of drain pipe blockage; the tapered structure facilitates the collection and discharge of water.

[0018] Furthermore, the waterproof sleeve is made of a soft material.

[0019] Beneficial effects: Ensures that the drainage pipe fitting can be inserted into the bottom of the positioning hole, which facilitates the positioning of the drainage pipe fitting. At the same time, it reduces the gap at the pipe root after the drainage pipe fitting is formed, and improves its service life.

[0020] Furthermore, a slot is formed at the bottom of the end mold, the length of which is equal to the width of the bottom mold, and the bottom mold is correspondingly engaged in the slot of the end mold.

[0021] Beneficial effects: The bottom formwork can limit the end formwork in the left and right directions through the slots, further enhancing the stability and firmness of the connection structure between the end formwork and the side formwork, and ensuring the prefabrication effect of the box girder.

[0022] Furthermore, a hoisting handle is fixed to the top of the end mold.

[0023] Beneficial effects: Facilitates the hoisting and movement of the end molds, and makes the installation and dismantling of the end molds easier. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 yes Figure 1A structural diagram showing the removal of one end mold and several drainage pipe fittings;

[0026] Figure 3 yes Figure 1 Cross-sectional view of drainage pipe fittings;

[0027] Figure 4 yes Figure 1 Schematic diagram of the middle mold structure;

[0028] In the diagram: 1-bottom mold, 2-side mold, 201-positioning hole, 3-end mold, 301-slot, 4-hydraulic cylinder, 5-lifting platform, 6-pull screw, 7-lifting handle, 8-drainage fitting, 11-drainage pipe, 12-proof sleeve, 601-connection hole. Detailed Implementation

[0029] The following is a more detailed description of a precast box girder template with drainage channels according to the present invention, in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1-4 As shown, this utility model discloses a precast box girder template with drainage channels, comprising a bottom mold 1, side molds 2, and end molds 3. The bottom of the bottom mold 1 is connected to a lifting platform 5 via a hydraulic cylinder 4. After the precast box girder is formed in the template, the hydraulic cylinder 4 on the lifting platform 5 can lift the precast box girder, facilitating demolding and improving the efficiency of precast box girder operation. The left and right side molds 2 are fixedly connected by tie rods 6 that pass through the lifting platform 5 on the left and right sides. The front and rear end molds 3 are fixedly connected by tie rods 6 that pass through the side molds 2 on the front and rear sides. A slot 301 is opened at the bottom of the end mold 3. The length of the slot 301 is equal to the width of the bottom mold 1. The bottom mold 1 is correspondingly engaged in the slot 301 of the end mold 3. The bottom mold 1 can limit the end mold 3 in the left and right directions through the slot 301, further ensuring the overall stability and firmness of the precast template structure. A hoisting handle 7 is fixed at the top of the end mold 3 to facilitate hoisting and moving of the end mold 3.

[0031] In this embodiment, the drainage pipe fittings 8 are pre-embedded on the precast template, avoiding the need for additional positioning holes on the formed box girder and improving the construction efficiency of the bridge drainage pipes. Specifically, several sets of drainage pipe fittings 8 are spaced apart along the front-back direction above the side formwork 2, and several sets of positioning holes 201 are spaced apart along the front-back direction above the side formwork 2. The diameter of the positioning holes 201 is adapted to the bottom of the drainage pipe fittings 8. The positioning holes 201 can locate the pre-embedded position of the drainage pipe fittings 8 in the box girder. The drainage pipe fittings 8 are vertically inserted into the positioning holes 201, with the bottom of the drainage pipe fittings 8 extending into the bottom of the positioning holes 201, ensuring that the drainage pipe fittings 8 are vertically inserted into the precast box girder. The top of the drainage pipe fittings 8 is flush with the top of the side formwork 2, ensuring that the top of the formed drainage pipe is flush with the surface of the box girder, meeting the requirements for bridge deck drainage.

[0032] In this embodiment, the drainage pipe fitting 8 includes a drainage pipe 11 and a seepage-proof sleeve 12. The seepage-proof sleeve 12 is adapted to be installed at both ends of the drainage pipe 11. The seepage-proof sleeve 12 can prevent concrete from entering the interior of the drainage pipe 11 during concrete pouring, thus preventing the drainage pipe 11 from being blocked. The diameter of the drainage pipe 11 is thicker at the top and thinner at the bottom, which facilitates the collection of accumulated water. A tapering structure is set between the thick and thin pipes to facilitate the collection and discharge of water. The upper end of the thick pipe is a drain mesh structure, which can filter out larger debris and prevent the drainage pipe 11 from being blocked. The seepage-proof sleeve 12 is made of soft material. On the one hand, it ensures that the drainage pipe fitting 8 can be inserted into the bottom of the positioning hole 201, which facilitates the positioning of the drainage pipe fitting 8 and reduces the flush error between the top of the drainage pipe 11 and the top of the side mold 2. On the other hand, the soft material can reduce the gap at the root of the drainage pipe 11 after it is formed, thus extending the service life of the drainage pipe 11.

[0033] In use, the bottom mold 1 is first fixed on the lifting platform 5. The side molds 2 are then placed close to the bottom mold 1 from both sides. The bottom of the side molds 2 is fixed using the tie rods 6 that pass through the lifting platform 5. The end mold 3 is then lifted using a crane and the lifting handle 7. The slot 301 at the bottom of the end mold 3 is then engaged with the bottom mold 1. The tie rods 6 that pass through the side molds 2 are passed through the corresponding connecting holes 601 on the end mold 3. The other end mold 3 is installed in the same way. The nuts on the tie rods 6 are then tightened to secure the end mold 3 and the side molds 2. Next, the drainage pipe fitting 8 is placed. First, the upper and lower ends of the drainage pipe 11 are covered with the anti-seepage sleeve 12. Then, the bottom of the drainage pipe fitting 8 is inserted into the positioning hole 201 of the side mold 2 to ensure... Drainage pipe fitting 8 is fully inserted to the bottom of positioning hole 201. All drainage pipe fittings 8 are inserted in sequence, and the entire casting formwork assembly is completed. A suitable steel cage is placed inside the corresponding formwork, and concrete is poured. After the box girder is formed, the nuts on the tie rods 6 on the outside of the end formwork 3 are loosened, and the end formwork 3 is moved away by a crane. Then, the hydraulic cylinder 4 of the lifting platform 5 is used to lift the bottom formwork 1, and the box girder on the bottom formwork 1 rises at the same time. The drainage pipe fitting 8 inserted into the positioning hole 201 rises along with the formed box girder. The drainage pipe fitting 8 gradually comes out of the positioning hole 201 and separates from the side formwork 2. The entire precast box girder can be lifted and moved away. The anti-seepage sleeves 12 at the upper and lower ends of the drainage pipe 11 are removed, and the precast box girder with drainage pipe 11 is completed.

[0034] The precast box girder formwork with drainage channels of this utility model has the following advantages: First, the drainage pipe 11 can be pre-embedded in the formed precast box girder, eliminating the need for additional box girder drilling operations, saving labor costs and improving the construction efficiency of the box girder drainage pipes; Second, several sets of drainage pipe fittings 8 are spaced apart on the upper part of the side formwork 2 along the front-back direction, and the pipe body of the drainage pipe 11 occupies a certain volume in the entire formwork, saving concrete pouring materials and reducing material costs; Third, the bottom of the bottom formwork 1 is connected to the lifting platform 5 through a hydraulic cylinder 4. After the box girder is formed in the precast formwork, the precast box girder can be easily demolded by hydraulic lifting, improving the precast efficiency of the box girder.

[0035] In the above embodiments, the drain pipe is thicker at the top and thinner at the bottom, with a tapering structure between the thick and thin pipes. The upper end of the thick pipe is a drain mesh structure. In other embodiments, the drain pipe can be a regular straight pipe.

[0036] In the above embodiments, a slot is provided at the bottom of the end mold, the length of which is equal to the width of the bottom mold, and the bottom mold is correspondingly engaged in the slot of the end mold. In other embodiments, the bottom of the end mold may not have a slot.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precast box girder formwork with drainage channels, characterized in that, It includes a bottom mold (1), a side mold (2) and an end mold (3). The bottom of the bottom mold (1) is connected to the lifting platform (5) by a hydraulic cylinder (4). The side molds (2) on the left and right sides are fixedly connected by tie rods (6) that pass through the lifting platform (5) on the left and right sides; The end molds (3) on the front and rear sides are fixedly connected by tie rods (6) that pass through the side molds (2) on the front and rear sides; Several sets of drainage pipe fittings (8) are arranged at intervals along the front-back direction above the side mold (2).

2. A precast box girder formwork with drainage channels according to claim 1, characterized in that, Several sets of positioning holes (201) are opened at intervals along the front-back direction on the upper part of the side mold (2), and the diameter of the positioning holes (201) is adapted to the bottom of the drainage pipe fitting (8).

3. A precast box girder formwork with drainage channels according to claim 2, characterized in that, The drainage pipe (8) is vertically inserted into the positioning hole (201), with the bottom of the drainage pipe (8) extending into the bottom of the positioning hole (201) and the top of the drainage pipe (8) being flush with the top of the side mold (2).

4. A precast box girder formwork with drainage channels according to claim 1 or 2, characterized in that, The drainage pipe fitting (8) includes a drainage pipe (11) and a seepage-proof sleeve (12), which is adapted to be installed at the upper and lower ends of the drainage pipe (11).

5. A precast box girder formwork with drainage channels according to claim 4, characterized in that, The drain pipe (11) has a diameter that is thicker at the top and thinner at the bottom, with a tapering structure between the thick and thin pipes, and the upper end of the thick pipe has a drain mesh structure.

6. A precast box girder formwork with drainage channels according to claim 4, characterized in that, The waterproof sleeve (12) is made of soft material.

7. A precast box girder formwork with drainage channels according to claim 1, characterized in that, The bottom of the end mold (3) has a slot (301) with a length equal to the width of the bottom mold (1) and the bottom mold (1) is correspondingly engaged in the slot (301) of the end mold (3).

8. A precast box girder formwork with drainage channels according to claim 7, characterized in that, The top of the end mold (3) is fixed with a hoisting handle (7).

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