A cast-in-situ prestressed concrete box girder hanging basket

Abstract

The utility model discloses a cast-in-situ prestressed concrete box girder hanging basket relates to box girder hanging basket technical field, including track assembly and truss subassembly, the truss subassembly includes front support, reverse buckle wheel, main truss, the top of front support, reverse buckle wheel is fixed to main truss, and the front end of main truss is hoisted with shuttering mechanism through suspension mechanism, track assembly includes guide rail unit, first compression unit, second compression unit, the guide rail unit is used to provide mobile support for front support, reverse buckle wheel, first compression unit is used to carry out compression to the middle part of guide rail unit, and second compression unit is used to carry out compression to the upper surface of guide rail unit. The utility model discloses a track assembly is set up, when carrying out hanging basket movement, compared with the structure that traditional track compression beam is integrally disassembled, through the whole compression structure of compression beam to I -shaped track, can effectively improve the stability of I -shaped track in the moving process, further improves the security of hanging basket movement.

Description

Technical Field

[0001] This utility model relates to the field of box girder hanging basket technology, specifically a cast-in-place prestressed concrete box girder hanging basket. Background Technology

[0002] The box girder hanging basket is the main equipment for cantilever construction. It is a load-bearing frame that can slide or roll along the top of the girder. It is anchored and suspended on the constructed girder segment, providing an aerial platform for the construction of the next segment. It is mostly used for the construction of box girders of long-span bridges. Its components are as follows:

[0003] Main truss: The main load-bearing structure of the hanging basket, bearing all loads transmitted from the bottom basket and rear anchorage. It can be assembled from structural steel, universal members, Bailey trusses, etc.; Suspension system: Used to suspend the bottom basket when the hanging basket moves and to transfer the load of the bottom basket during concrete pouring. It usually comes in two forms: suspenders and slings, with height adjusted by pins or connectors to adapt to different beam bottom elevations; Anchorage system: The key to the balance and stability of the hanging basket, including rear anchorage and rear lower anchorage, ensuring the overturning stability of the hanging basket under various working conditions such as movement and concrete pouring; Movement system: Includes moving devices and power facilities, supporting the main truss to move the hanging basket longitudinally along the bridge through rolling and sliding facilities; Bottom basket system: Directly bears the gravity load of the cantilever beam segment and other additional loads such as formwork, consisting of front and rear crossbeams, bottom formwork longitudinal beams, and front and rear lower working platforms; Formwork system: Includes bottom formwork, inner and outer formwork, and end formwork, serving as a construction platform for the installation of reinforcing steel and prestressed ducts, concrete pouring, etc.

[0004] When moving the box girder formwork, the rear anchoring system of the formwork needs to be gradually loosened, such as by loosening the nuts of the rear anchor rods or removing the rear anchor straps. The track pressure beam near the main truss's reverse wheel should also be removed to prevent it from obstructing the movement of the main truss's reverse wheel. After the reverse wheel has passed the track pressure beam area, the track pressure beam should be reinstalled. However, during the removal of the track pressure beam, the downward pressure of the track is weakened. To avoid this situation, a cast-in-place prestressed concrete box girder formwork is provided. Utility Model Content

[0005] The purpose of this utility model is to provide a hanging basket for cast-in-place prestressed concrete box girders in order to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cast-in-place prestressed concrete box girder hanging basket, comprising a track assembly and a truss assembly installed on the top of the box girder. The truss assembly includes a front support, a reverse wheel, and a main truss. The main truss is fixed to the top of the front support and the reverse wheel. A template mechanism is suspended at the front end of the main truss via a suspension mechanism. The track assembly includes a guide rail unit, a first clamping unit, and a second clamping unit.

[0007] The guide rail unit is used to provide movement support for the front support and the reverse wheel;

[0008] The first clamping unit is used to clamp the middle part of the guide rail unit, and the second clamping unit is used to clamp the upper surface of the guide rail unit.

[0009] As a further embodiment of this utility model: the guide rail unit includes a pad beam and an I-shaped rail;

[0010] The pad beam is installed on the upper surface of the box girder. Two I-shaped tracks are provided. The two I-shaped tracks are symmetrically placed on the top of the pad beam and fixed to the box girder through the first clamping unit and the second clamping unit. The front support and the reverse wheel are slidably connected to the front and rear ends of the I-shaped track, and the I-shaped track is used to provide support and guidance for the movement of the front support and the reverse wheel.

[0011] As a further embodiment of this utility model: the first clamping unit includes an insertion port, a clamping beam, a central through-hole, an anchoring bolt, a washer, and a fastening bolt;

[0012] The insertion port is opened on the vertical side of the I-shaped track and extends completely to the other side. The clamping beam extends from one side of the I-shaped track through the insertion port to the other side of the other I-shaped track. The central through-hole is opened at the top of the middle part of the clamping beam and extends completely to the bottom of the clamping beam.

[0013] The anchor bolt passes through the middle through-hole from the top of the clamping beam and is threadedly connected to the pre-embedded nut on the box girder. The gasket and fastening bolt are sequentially sleeved on the outside of the anchor bolt, and the fastening bolt is threadedly connected to the anchor bolt to tighten and compress the gasket and the clamping beam, thereby fixing the I-shaped track to the box girder.

[0014] As a further embodiment of this utility model: the second pressing unit includes a movable slot, a side concave clamping plate, a polygonal block, a pressing column, a screw, and a screw hole;

[0015] The movable slots are symmetrically opened on both sides of the clamping beam, and the screw holes are opened inside the movable slots and extend to the inside of the central through-hole.

[0016] The concave side plate is horizontally slidably connected to the inside of the movable slot. The polygonal block, the clamping column, and the screw are connected and fixed in sequence along the horizontal direction. The screw passes through the concave side plate and is threadedly connected to the screw hole and tightened. This is used to make the top horizontal part of the concave side plate engage with the upper surface of the I-shaped track, thereby realizing the clamping operation on the upper surface of the I-shaped track.

[0017] As a further improvement of this utility model: the vertical part of the concave side plate is provided with a through hole for the screw to pass through, the outer diameter of the clamping column is larger than the inner diameter of the through hole, and the length of the clamping column is greater than the depth of the moving slot.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By setting up a track assembly, compared to the traditional structure where the track pressure beam is completely removed, the structure where the pressure beam continuously presses against the I-shaped track during the movement of the hanging basket can effectively improve the stability of the I-shaped track and further enhance the safety of the hanging basket movement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram showing the disassembled track assembly of this utility model;

[0022] Figure 3 This is a schematic diagram showing the disassembled parts of the track assembly of this utility model.

[0023] In the diagram: 1. Box girder; 2. Track assembly; 201. Pad beam; 202. I-beam track; 203. Intercepting opening; 204. Compression beam; 205. Central through-hole; 206. Moving slot; 207. Anchor bolt; 208. Gasket; 209. Fastening bolt; 210. Side concave clamping plate; 211. Polygonal block; 212. Compression column; 213. Screw; 214. Screw hole; 3. Truss assembly; 301. Front support; 302. Reverse buckle wheel; 303. Main truss; 4. Suspension mechanism; 5. Formwork mechanism. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-3In this embodiment of the utility model, a cast-in-place prestressed concrete box girder hanging basket includes a track assembly 2 and a truss assembly 3 installed on the top of the box girder 1. The truss assembly 3 includes a front support 301, a reverse wheel 302, and a main truss 303. The main truss 303 is fixed to the top of the front support 301 and the reverse wheel 302. The front end of the main truss 303 is suspended by a formwork mechanism 5 through a suspension mechanism 4. The track assembly 2 includes a guide rail unit, a first pressing unit, and a second pressing unit.

[0026] The guide rail unit is used to provide moving support for the front support 301 and the reverse wheel 302;

[0027] The first clamping unit is used to clamp the middle part of the guide rail unit, and the second clamping unit is used to clamp the upper surface of the guide rail unit.

[0028] The guide rail unit includes a pad beam 201 and an I-beam rail 202;

[0029] The pad beam 201 is installed on the upper surface of the box girder 1. Two I-beam rails 202 are provided. The two I-beam rails 202 are symmetrically placed on the top of the pad beam 201 and fixed to the box girder 1 through the first clamping unit and the second clamping unit. The front support 301 and the reverse wheel 302 are slidably connected to the front and rear ends of the I-beam rails 202 respectively. The I-beam rails 202 are used to provide support and guidance for the movement of the front support 301 and the reverse wheel 302.

[0030] The first clamping unit includes an insertion port 203, a clamping beam 204, a central through port 205, an anchoring bolt 207, a gasket 208, and a fastening bolt 209;

[0031] The insertion port 203 is opened on the side of the vertical part of the I-shaped track 202 and completely extends to the other side. The clamping beam 204 passes through the insertion port 203 from one side of the I-shaped track 202 to the other side of the other I-shaped track 202. The middle through port 205 is opened at the top of the middle part of the clamping beam 204 and completely extends to the bottom of the clamping beam 204.

[0032] Anchor bolt 207 passes through the middle through-hole 205 from the top of clamping beam 204 and is threadedly connected to the pre-embedded nut on box girder 1. Washer 208 and fastening bolt 209 are sequentially sleeved on the outside of anchor bolt 207, and the fastening bolt 209 is threadedly connected to anchor bolt 207. Tightening the fastening bolt 209 compresses the washer 208 and clamping beam 204 to fix the I-shaped track 202 to box girder 1.

[0033] The second clamping unit includes a movable slot 206, a side concave clamping plate 210, a polygonal block 211, a clamping column 212, a screw 213, and a screw hole 214.

[0034] The movable slots 206 are symmetrically opened on both sides of the clamping beam 204, and the screw holes 214 are opened inside the movable slots 206 and extend to the inside of the central through-hole 205.

[0035] The concave side plate 210 is horizontally slidably connected to the inside of the movable slot 206. The polygonal block 211, the clamping column 212, and the screw 213 are connected and fixed horizontally in sequence. The screw 213 passes through the concave side plate 210 and is threadedly connected to the screw hole 214 and tightened. This is used to make the top horizontal part of the concave side plate 210 engage with the upper surface of the I-shaped track 202, thereby realizing the clamping operation on the upper surface of the I-shaped track 202.

[0036] In this embodiment, it should be noted that the truss assembly 3, suspension mechanism 4, template mechanism 5, and other structures are existing technologies and will not be described in detail here.

[0037] When the basket needs to be moved, the concave side plate 210 will obstruct the movement of the reverse wheel 302. At this time, the polygonal block 211 is manually turned with a tool to loosen the screw 213 and screw hole 214. Then, the clamping column 212 releases the clamping on the concave side plate 210, so that the concave side plate 210 can be moved outward along the moving slot 206, so that the concave side plate 210 releases the clamping on the upper surface of the I-shaped track 202. Finally, the concave side plate 210 is completely separated from the I-shaped track 202 and is away from the movement trajectory of the reverse wheel 302, so that it will not obstruct the movement of the reverse wheel 302. At the same time, the clamping beam 204, with the cooperation of the anchoring screw 207, the washer 208, and the fastening bolt 209, still maintains stable clamping on the I-shaped track 202.

[0038] This design facilitates the movement of the hanging basket. Compared to the traditional structure that involves removing the entire track pressure beam, the continuous pressing of the I-shaped track 202 by the pressure beam 204 effectively improves the stability of the I-shaped track 202 during movement, further enhancing the safety of the hanging basket's movement.

[0039] Please refer to this carefully. Figures 2-3 The vertical part of the concave side plate 210 has a through hole for the screw 213 to pass through. The outer diameter of the clamping column 212 is larger than the inner diameter of the through hole, and the length of the clamping column 212 is greater than the depth of the moving slot 206.

[0040] In this embodiment, the clamping column 212 can provide a clamping operation for the concave side plate 210, and at the same time, the polygonal block 211 can be located outside the moving slot 206 to facilitate the twisting operation.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A formwork for a cast-in-place prestressed concrete box girder, comprising a track assembly (2) and a truss assembly (3) installed on the top of the box girder (1), characterized in that, The truss assembly (3) includes a front support (301), a reverse wheel (302), and a main truss (303). The main truss (303) is fixed to the top of the front support (301) and the reverse wheel (302). The front end of the main truss (303) is suspended by a suspension mechanism (4) and a template mechanism (5). The track assembly (2) includes a guide rail unit, a first clamping unit, and a second clamping unit. The guide rail unit is used to provide moving support for the front support (301) and the reverse wheel (302); The first clamping unit is used to clamp the middle part of the guide rail unit, and the second clamping unit is used to clamp the upper surface of the guide rail unit.

2. The formwork for a cast-in-place prestressed concrete box girder according to claim 1, characterized in that, The guide rail unit includes a pad beam (201) and an I-beam rail (202); The pad beam (201) is installed on the upper surface of the box girder (1). There are two I-shaped rails (202). The two I-shaped rails (202) are symmetrically placed on the top of the pad beam (201) and fixed to the box girder (1) through the first clamping unit and the second clamping unit. The front support (301) and the reverse wheel (302) are slidably connected to the front and rear ends of the I-shaped rail (202). The I-shaped rail (202) is used to provide support and guidance for the movement of the front support (301) and the reverse wheel (302).

3. The formwork for a cast-in-place prestressed concrete box girder according to claim 2, characterized in that, The first clamping unit includes an insertion port (203), a clamping beam (204), a central through-hole (205), an anchoring bolt (207), a gasket (208), and a fastening bolt (209); The insertion port (203) is opened on the vertical side of the I-shaped track (202) and extends completely to the other side. The clamping beam (204) extends from one side of the I-shaped track (202) through the insertion port (203) to the other side of the other I-shaped track (202). The central through port (205) is opened at the top of the middle part of the clamping beam (204) and extends completely to the bottom of the clamping beam (204). The anchor bolt (207) passes through the middle through-hole (205) from the top of the clamping beam (204) and is threadedly connected to the pre-embedded nut on the box girder (1). The gasket (208) and the fastening bolt (209) are sequentially sleeved on the outside of the anchor bolt (207), and the fastening bolt (209) is threadedly connected to the anchor bolt (207) to tighten the gasket (208) and the clamping beam (204) to achieve the fixation of the I-shaped track (202) and the box girder (1).

4. The formwork for a cast-in-place prestressed concrete box girder according to claim 3, characterized in that, The second clamping unit includes a movable slot (206), a side concave clamping plate (210), a polygonal block (211), a clamping column (212), a screw (213), and a screw hole (214); The movable slots (206) are symmetrically opened on both sides of the clamping beam (204), and the screw holes (214) are opened inside the movable slots (206) and extend to the inside of the central through-hole (205); The concave side plate (210) is horizontally slidably connected to the inside of the movable slot (206). The polygonal block (211), the clamping column (212), and the screw (213) are connected and fixed horizontally in sequence. The screw (213) passes through the concave side plate (210) and is threadedly connected to the screw hole (214) and tightened. This is used to make the top horizontal part of the concave side plate (210) engage with the upper surface of the I-shaped track (202) to realize the clamping operation on the upper surface of the I-shaped track (202).

5. A formwork for a cast-in-place prestressed concrete box girder according to claim 4, characterized in that, The vertical part of the concave side plate (210) has a through hole for the screw (213) to pass through. The outer diameter of the clamping column (212) is larger than the inner diameter of the through hole, and the length of the clamping column (212) is greater than the depth of the moving slot (206).

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