CN110644788A - A method and device for controlling the lifting and lowering of the bottom mold of a cast-in-place wet joint of a prefabricated beam - Google Patents

Abstract

The invention discloses a method and a device for controlling the lifting of a bottom die of a cast-in-place wet joint of a precast beam, wherein before the cast-in-place wet joint is poured between two adjacent precast beams, a temporary support is erected on the two precast beams in advance, a steel bar roller is arranged on the temporary support, an anti-falling lifting rope is connected to the steel bar roller, and one end of the anti-falling lifting rope penetrates through a PVC sleeve arranged between the two precast beams and then is connected with the bottom die below the two precast beams; therefore, pouring wet joints can be formed between the two precast beams, and after the pouring of the poured wet joints is completed, the lifting of the bottom die below the precast beams is controlled by shaking the rotating handle on the steel bar idler wheel. The invention can conveniently pull the bottom die of the cast-in-place wet joint, is convenient for operators to control the bottom die to fall, and can greatly reduce the labor capacity and shorten the construction period. The invention can be detached for repeated use, saves materials and reduces cost. And the falling speed of the bottom die can be manually controlled, and the safety of a construction site is effectively improved.

Description

A method and device for controlling the lifting and lowering of the bottom mold of a cast-in-place wet joint of a prefabricated beam

technical field

The invention relates to a method and a device for controlling the lifting and lowering of a bottom mold of a cast-in-place wet joint of a prefabricated beam, and belongs to the technical field of building construction.

Background technique

In the prior art, when the cast-in-place wet seam is erected or the formwork is disassembled, workers are operated at high altitudes and the formwork is transferred manually. In the process of erection or disassembly, it is easy to cause the safety accident of the formwork smashing the formwork dismantling workers below. Usually, the wet seam has a long working route in the horizontal direction, and the formwork dismantling personnel under the formwork must lift their heads to transfer the formwork, which leads to problems such as difficult work and low work efficiency for the formwork dismantling and transfer formwork personnel. Therefore, the existing technology is not perfect and needs to be further improved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method and device for controlling the lifting and lowering of the cast-in-situ wet joint bottom form of a prefabricated beam, so that the erection or disassembly formwork is safe and reliable, and the operation efficiency can be improved, thereby overcoming the deficiencies of the prior art.

To achieve the above object, the present invention adopts the following technical solutions:

The present invention is a method for controlling the lifting and lowering of the bottom mold of the cast-in-place wet joint of prefabricated beams. The method is to set up temporary supports on the two prefabricated beams in advance before pouring the cast-in-place wet joint between two adjacent prefabricated beams. , and install the steel roller on the temporary bracket, and connect the anti-falling rope on the steel roller, and make one end of the anti-falling rope pass through the PVC casing set between the two prefabricated beams and the two prefabricated beams. The bottom form below is connected; in this way, a wet joint can be poured between the two precast beams, and after the pouring of the cast-in-place wet joint is completed, the bottom form below the precast beam can be controlled by shaking the rotating handle on the rebar roller. the lift.

In the above-mentioned method for controlling the lifting and lowering of the bottom form of the cast-in-place wet joint of the prefabricated beam, the top of the PVC casing should be higher than the concrete surface of the upper surfaces of the two prefabricated beams by more than 5 cm, so as to prevent the concrete from flowing into the PVC during the pouring of the cast-in-place wet joint. The anti-fall sling is condensed in the casing.

A device of the present invention for controlling the lifting and lowering of the cast-in-place wet joint bottom mold of a prefabricated beam constructed according to the above method includes two adjacent prefabricated beams, and a temporary bracket is placed on the adjacent two prefabricated beams. A steel roller is installed on the steel bar, and an anti-falling rope is connected to the steel roller. The PVC casing in the cast-in-place wet joint is connected with the bottom mold under the cast-in-place wet joint; the bottom mold under the cast-in-place wet joint is controlled by shaking the rotating handle on the rebar roller.

In the above device for controlling the lifting and lowering of the cast-in-place wet joint bottom mold of a prefabricated beam, the temporary support includes a pair of angle steel legs; the tops of the pair of angle steel legs are connected by the end angle steel; the bottom of the end angle steel is welded with a pair of and angle steel A pair of steel pipe outriggers with symmetrical positions of the outriggers; a transverse link is arranged between the angle steel outriggers and the steel pipe outriggers; the upper part of the angle steel outriggers is provided with mounting holes for installing the rebar rollers; the rotating handles at both ends of the rebar rollers pass through the mounting holes By rotating with the angle steel legs.

In the above device, a formwork bottom bracket capable of supporting the bottom mold is connected to the anti-falling rope at the lower end of the bottom mold.

Due to the adoption of the above technical solution, compared with the prior art, the present invention can pull the bottom mold of the cast-in-place wet joint, and perform the lifting operation of the bottom mold according to the construction needs, which greatly facilitates the operator to control the bottom mold Landing or lifting can greatly reduce the amount of labor and shorten the construction period. The materials used in the present invention can be disassembled and reused, saving materials and reducing costs. The use of anti-fall rope drop formwork can manually control the drop speed, which effectively improves the safety of the construction site.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

FIG. 2 is a front view of FIG. 1 .

The markings in the drawings are: 1-rotating handle, 2-steel roller, 3-transverse connecting rod, 4-anti-falling rope, 5-capped angle steel, 6-angle steel leg, 7-steel pipe leg, 8- PVC casing, 9- bottom formwork, 10- formwork bottom bracket, 11- prefabricated prefabricated beam flange plate, 12- cast-in-place wet joint.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

A method of controlling the lifting and lowering of the cast-in-place wet joint bottom mold of a prefabricated beam according to the present invention is shown in Figures 1 and 2: the method is to place the cast-in-place wet joint 12 between two adjacent prefabricated beams 11 before casting. , set up temporary brackets on the two prefabricated beams 11 in advance, and install the steel bar roller 2 on the temporary bracket, and connect the anti-falling rope 4 on the steel roller 2 at the same time, and make one end of the anti-falling hanging rope 4 pass through and set in the The PVC casing 8 between the two prefabricated beams 11 is then connected to the bottom mold 9 below the two prefabricated beams 11; in this way, the cast-in-place wet joint 12 can be poured between the two prefabricated beams 11, and the cast-in-place wet joint 12 can be poured between the two prefabricated beams 11. After the joint 12 is poured, the bottom mold 9 under the prefabricated beam 11 is controlled by shaking the rotating handle 1 on the rebar roller 2; during production, the top of the PVC sleeve 8 should be higher than the upper surface of the two prefabricated beams. The concrete surface should be more than 5 cm, so as to prevent the concrete from flowing into the PVC casing 8 when the cast-in-place wet joint 12 is poured, so that the anti-falling suspender 4 is frozen.

A device for controlling the lifting and lowering of the cast-in-situ wet joint bottom mold of a prefabricated beam according to the present invention constituted according to the above method, as shown in Figures 1 and 2: the device includes two adjacent prefabricated beams 11 that have been fabricated. Temporary brackets are set up on the two adjacent prefabricated beams 11, and steel bar rollers 2 are installed on the temporary brackets. The steel bar rollers 2 are connected with anti-dropping ropes 4, and the anti-dropping ropes 4 are wound on the steel bar rollers 2 to prevent falling. The other end of the hanging rope 4 passes through the cast-in-place wet joint 12 between the two prefabricated beams 11, and is connected to the bottom mold 9 below the cast-in-place wet joint 12; the prefabricated beam is controlled by shaking the rotating handle 1 on the rebar roller 2 Lifting of cast-in-place wet seam bottom molds. The temporary support includes a pair of angle steel legs 6; the top of the pair of angle steel legs 6 is connected by the end angle steel 5; the bottom of the end angle steel 5 is welded with a pair of steel pipe legs 7 that are symmetrical with the angle steel legs 6; angle steel legs There is a transverse link 3 between 6 and the steel pipe outrigger 7; the upper part of the angle steel outrigger 6 is provided with a mounting hole for installing the rebar roller 2; connect. The anti-falling rope 4 is provided with a template bottom bracket 10 , and the bottom mold 9 is supported by the template bottom bracket 10 . The anti-falling rope 4 is provided with a PVC sleeve 8 through the cast-in-place wet joint 12 to prevent concrete from being poured on the anti-falling rope 4 . The top of the PVC casing 8 should be 5 cm above the concrete surface to prevent the concrete from flowing into the PVC casing 8 to condense the anti-falling rope 4 when pouring concrete.

In specific implementation, the rotating handle 1 and the steel bar roller 2 are welded together, the angle steel legs 6 and the steel pipe legs 7 are connected by the transverse link 3, and the end-sealing angle steel 5 is used to fix and seal the ends to form a temporary support. Sleeve the rotating handle 1 and the rebar roller 2 on the temporary bracket, and combine with the anti-falling rope 4, the PVC sleeve 8, and the formwork bottom bracket 10 to form a bottom mold lifting device.

During the construction of the formwork, the rotating handle 1 and the steel bar roller 2 are connected vertically through the angle steel leg 6 and the steel bar support leg 7; the transverse link 3 is welded with the angle steel support leg 6 and the steel bar support leg 7 to form a triangle; the end angle steel 5 The two outriggers are combined and fixed to form a temporary bracket. The formwork bottom bracket 10 is connected with the rebar roller 2 by the anti-falling rope 4, and the PVC casing 8 is used to isolate the anti-falling rope 4 from the cast-in-place wet joint 12 to prevent the cast-in-place wet joint 12 from freezing and locking. The formwork bottom bracket 10 supports the bottom mold 9 to prevent the bottom mold 9 from falling off during demolding and causing safety accidents. The rotating handle 1 is welded with the steel bar roller 2, and the angle steel leg 6 is drilled and socketed so that it can be rotated. The anti-fall hanging rope 4 is isolated by a PVC casing 8 through a section of the cast-in-place wet joint 12. The top of the PVC casing 8 should be 5cm higher than the concrete surface to prevent the concrete from flowing into the PVC casing to condense the anti-fall hanging rope when pouring concrete. live. Make sure that the demolition process allows the anti-fall rope 4 to pass through the cast-in-place wet seam 12 smoothly.

The PVC sleeve 8 can be pre-installed on the bottom mold 9, the PVC sleeve 8 runs through the bottom mold 9, and the top of the PVC sleeve 8 should be 5 cm above the concrete surface. When the strength of the cast-in-place wet seam 12 reaches the mold removal condition, the anti-falling rope 4 is passed through the PVC sleeve 8 and connected to the bottom mold 9 under the bottom mold 9. When the bottom mold support is removed, the handle 1 is manually controlled to rotate. , drop the bottom mold 9 safely.

The invention has the advantages of simple structure, low manufacturing cost, less consumables and convenient maintenance in the later stage; the cast-in-place wet seam bottom mold can be pulled during use, which is convenient for operators to control the bottom mold to descend, and can greatly reduce labor and shorten construction period. The materials used in the present invention can be disassembled and reused, saving materials and reducing costs. The use of anti-fall rope drop formwork can manually control the drop speed, which improves the safety of the construction site.

Claims (5)

1. a method for controlling the lifting and lowering of the cast-in-place wet joint bottom mould of prefabricated beams, is characterized in that: the method is that before the cast-in-place wet joint is poured between adjacent two prefabricated beams, on the two prefabricated beams in advance Set up a temporary support, install a steel roller on the temporary support, and connect an anti-falling rope to the steel roller, and make one end of the anti-falling rope pass through the PVC casing set between the two prefabricated beams and the two. Bottom form connection under the block precast beams; this allows the pouring of the wet joint between the two precast beams, and after the pouring of the cast-in-place wet joint is completed, the lower part of the precast beam can be controlled by shaking the rotating handle on the rebar roller The lifting of the bottom mold. 2. The method for controlling the lifting and lowering of the cast-in-place wet joint bottom form of a prefabricated beam according to claim 1, wherein the top of the PVC casing should be higher than the concrete surface of the upper surface of the two prefabricated beams by more than 5cm to prevent When pouring the cast-in-place wet joint, the concrete flows into the PVC casing to solidify the anti-falling rope. 3. A device for controlling the lifting and lowering of a cast-in-place wet joint bottom mold of a prefabricated beam, comprising two adjacent prefabricated beams (11), characterized in that: a temporary support is placed on the adjacent two prefabricated beams (11). , a steel roller (2) is installed on the temporary bracket, an anti-falling rope (4) is connected to the steel roller (2), and one end of the anti-falling rope (4) is wound on the steel roller (2) to prevent falling The other end of the suspending rope (4) passes through the PVC sleeve (8) used for pre-buying in the cast-in-place wet joint (12) between the two prefabricated beams (11), and then connects with the cast-in-place wet joint (12). ) is connected with the bottom mold (9) below; the bottom mold (9) under the cast-in-place wet joint (12) is controlled to rise and fall by shaking the rotating handle (1) on the rebar roller (2). 4. The device for controlling the lifting and lowering of the cast-in-place wet joint bottom mold of a prefabricated beam according to claim 3, wherein the temporary support comprises a pair of angle steel legs (6); the top of the pair of angle steel legs (6) Connected by the capped angle steel (5); the bottom of the capped angle steel (5) is welded with a pair of steel pipe legs (7) symmetrical with the angle steel legs (6); A transverse connecting rod (3) is arranged between ); the upper part of the angle steel leg (6) is provided with a mounting hole for installing the rebar roller (2); the rotating handles (1) at both ends of the rebar roller (2) pass through the Angle steel legs (6) are connected in rotation. 5. The device for controlling the lifting and lowering of the bottom mold of the cast-in-place wet seam of a prefabricated beam according to claim 3, characterized in that: the anti-falling rope (4) at the lower end of the bottom mold (9) is connected with a device capable of supporting the bottom mold. The formwork base (10) held by the formwork (9).

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