Large-span retard-bonded prestressed beam positioning device and construction method

Abstract

The invention discloses a large-span retard-bonded prestressed beam positioning device and a construction method. The large-span retard-bonded prestressed beam positioning device comprises a reinforcement cage, a positioning plate; a plurality of screw holes are formed in the body length direction of the positioning plate; the sleeve assembly is arranged on one side of the positioning plate and detachably connected with the positioning plate; the angle of the sleeve assembly can be adjusted on the positioning plate through disassembly and reinstallation; the stirrup clamp assembly is arranged on the side, away from the sleeve assembly, of the positioning plate; one end, far away from the positioning plate, of the stirrup clamp assembly sleeves a vertical stirrup of the reinforcement cage and is detachably connected with the vertical stirrup of the reinforcement cage; and the retard-bonded prestressed tendons are arranged in the sleeve assembly. According to the invention, by rotating the butterfly knob, the opening and closing of the opening and closing hoop can be effectively controlled; the arc-shaped surface of the fixing block is combined with the inner wall surface of the opening and closing hoop to form a circular clamping cavity, so that a vertical stirrup of the reinforcement cage is tightly held, and the vertical stirrup is ensured to be stable; according to the design, the convenience and safety of operation are improved, and the stability of the structure and the high efficiency of construction are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a positioning device and a construction method for a large-span slow-bonding prestressed beam. Background Art

[0002] With the increasing requirements of space utilization and structural performance in modern construction projects, traditional reinforced concrete beams can no longer meet the needs of large spans and high bearing capacity. Especially in the construction of high-rise buildings and large public facilities, higher requirements are placed on the deadweight, rigidity, and seismic performance of frame beams. Therefore, prestressed technology, as an effective means to improve the performance of concrete structures, has gradually been widely used in the construction of structural beams.

[0003] The slow-bonding prestressing technology combines the advantages of unbonded prestressing and bonded prestressing. By forming a slow-setting material between the prestressed tendons and concrete, the prestressed tendons can slide freely in the early stage, and gradually solidify after reaching a predetermined time to form an effective bond. This technology not only improves the bonding strength between the prestressed tendons and concrete, but also simplifies the construction process and reduces costs. However, due to the characteristics of large spans, the arrangement of slow-bonding prestressing tendons in beams must avoid tying dense steel bars and control the height of key positions, so it is inevitable that there will be twists and turns. At this time, a device that can accurately position the prestressed steel in the slow-bonding prestressed beam is also needed.

[0004] Most of the existing prestressed tendon positioning devices use simple support or clamp structures, which cannot accurately control the height and position of the prestressed tendons in large-span beams. This positioning method is prone to cause the position of the prestressed tendons to shift during construction when the prestressed tendons are arranged more complexly, affecting the overall quality of the project; because the prestressed tendons in large-span beams are usually long and have complex bends, the existing positioning devices need to be adjusted repeatedly during installation, especially when the steel bars are densely tied, which is inconvenient to operate and consumes time and manpower. The existing positioning devices also need to be fixed by tying, welding, etc., which increases the complexity of construction. The existing positioning devices use simple stirrup clamps to position on the steel cage. Simple stirrup clamps are easily affected by vibration or external forces during construction and slide. Especially when the prestressed tendons are not firmly fixed in the early stage, the positioning device is difficult to ensure long-term stability, which may affect the effective arrangement of the prestressed tendons. Summary of the invention

[0005] The object of the present invention is to provide a large-span slow-bonding prestressed beam positioning device and a construction method, so as to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A positioning device for a large-span slow-bonding prestressed beam, comprising:

[0008] Steel cage;

[0009] A positioning plate; a plurality of screw holes are arranged along the length direction of the positioning plate;

[0010] The sleeve assembly is arranged on one side of the positioning plate and is detachably connected to the positioning plate; the sleeve assembly can be disassembled and reinstalled on the positioning plate to adjust the angle;

[0011] The stirrup clamp assembly is arranged on the side of the positioning plate away from the sleeve assembly and is detachably connected to the positioning plate; the end of the stirrup clamp assembly away from the positioning plate is sleeved on the vertical stirrups of the steel cage and is detachably connected to the vertical stirrups of the steel cage; the slow-bonding prestressed steel strand is arranged in the sleeve assembly.

[0012] In some specific embodiments, it also includes: a plurality of locking nuts for fixing the sleeve assembly and the stirrup clamp assembly on the positioning plate.

[0013] In some specific embodiments, the sleeve assembly includes:

[0014] The prestressed sleeve is arranged on one side of the positioning plate and connected to the positioning plate; the angle between the axis of the prestressed sleeve and the axis of the positioning plate is 0°-180°;

[0015] A first screw rod is arranged at one end of the prestressed sleeve adjacent to the positioning plate, and one end of the first screw rod is fixedly connected to the prestressed sleeve;

[0016] One end of the first screw rod away from the prestressed sleeve is arranged in the screw rod hole; and is fixed on the positioning plate through a locking nut.

[0017] In some specific embodiments, the stirrup clamp assembly includes:

[0018] A fixing block, wherein a second screw is arranged at one end of the fixing block adjacent to the positioning plate; the fixing block is fixed to the positioning plate by a locking nut;

[0019] A through slot, a notch slot and a splicing slot are provided along the length direction of the fixed block and are arranged on the same side;

[0020] The splicing groove is formed at one end of the fixing block away from the second screw rod, the notch groove is formed at one end of the fixing block close to the second screw rod, and the through groove is formed on the inner wall of the notch groove;

[0021] There are two limit seats, which are respectively installed at the top and bottom of the splicing groove, one end of the limit seat is connected to the fixed block; a round hole is opened at the end of the limit seat away from the fixed block;

[0022] A spring shaft is arranged in the splicing groove, and both ends of the spring shaft pass through the circular holes respectively and are installed on the limit seat. In some specific embodiments, the spring shaft includes:

[0023] A vertical shaft is provided with a plurality of sets of springs along the length of the vertical shaft; the springs are distributed at equal distances;

[0024] There are multiple resistance blocks, one end of which is provided with two limiting rings. The resistance block is sleeved on the vertical shaft through the limiting rings. The spring is arranged between the two limiting rings, and the two ends of the spring are respectively connected to the limiting rings.

[0025] In some specific embodiments, the stirrup clamp assembly further includes:

[0026] The opening and closing hoop is in an arc shape and is arranged on the side of the fixed block where the notch groove is provided; it is connected to the fixed block; the inner arc surface of the opening and closing hoop can form a circular clamping cavity with the notch groove;

[0027] The end of the opening and closing hoop adjacent to the spring shaft is provided with a connecting portion.

[0028] The connecting portion is provided along the height and width direction of the opening and closing hoop;

[0029] A rotation groove is provided on the outer arc surface of the connecting portion;

[0030] The top and bottom ends of the connecting part are provided with shaft holes, which are connected with the rotating groove;

[0031] The top and bottom ends of the spring shaft are rotatably connected to the shaft hole of the connecting part. In some specific embodiments, a side of the connecting part adjacent to the spring is provided with a evacuation hole; there are multiple evacuation holes, which are evenly distributed along the length of the connecting part;

[0032] One end of the resistance block away from the spring can be limited in the avoidance hole.

[0033] In some specific embodiments, the stirrup clamp assembly further includes:

[0034] A limiting edge strip is arranged at one end of the opening and closing hoop adjacent to the through slot and connected to the opening and closing hoop;

[0035] A locking groove is provided on one side of the limiting edge strip body adjacent to the through groove in the length direction;

[0036] A limit rotating column is arranged in the through groove, and a receiving groove is provided on one side of the limit rotating column adjacent to the locking groove;

[0037] An elastic block, one end of which is arranged in the receiving groove and fixedly connected to the receiving groove;

[0038] An elastic pin is arranged at one end of the elastic block away from the receiving groove and is fixedly connected to the elastic block;

[0039] The elastic pin can be limited in the locking groove; the side of the elastic pin adjacent to the locking groove is arc-shaped;

[0040] A butterfly knob is arranged on the top of the limit rotating column for turning the limit rotating column.

[0041] In some specific embodiments, rubber pads are fixedly attached to the arc-shaped inner walls of the fixed block and the opening and closing hoop, so as to prevent the hoop clamp assembly from sliding during construction.

[0042] A construction method of a large-span slow-bonding prestressed beam positioning device based on the same concept includes the following steps:

[0043] S100. First, assemble the positioning device: the prestressed sleeve is fixedly installed on one side of the positioning plate by the cooperation of the first screw, the screw hole and the locking nut, and the stirrup clamp assembly is fixedly installed on the other side of the positioning plate by the cooperation of the second screw, the screw hole and the locking nut. The prestressed sleeve and the stirrup clamp assembly are arranged at an angle of 0°-180° to each other.

[0044] S200, secondly, fix the positioning device, and rotate the butterfly knob to drive the limit rotating column to rotate. When the limit rotating column rotates inward, the elastic pin is squeezed by the inner wall of the through groove and contracts, thereby controlling the opening and closing hoop to open. At this time, the worker pushes the opening and closing hoop toward the direction of the spring shaft. The resistance block on the spring shaft begins to squeeze the spring backward under the thrust and deforms, so that the opening and closing hoop and the fixed block open a certain opening. The worker puts the opening and closing hoop on the vertical hoop of the steel cage;

[0045] S300, release the thrust applied to the opening and closing hoop, the spring starts to push the resistance block in the reverse direction under the action of its own rebound force, and then the opening and closing hoop will automatically close and return to its original state under the action of the reverse thrust of the resistance block, the arc surface of the fixed block and the inner wall surface of the opening and closing hoop form a circular clamping cavity to hold the vertical hoop of the steel cage, and turn the butterfly knob again, when the limit rotating column rotates outward to drive the elastic pin out of the through groove, the elastic pin pops outward under the action of its own elastic force and is inserted into the locking groove, and the opening and closing hoop is driven to close tightly and hold the vertical hoop of the steel cage through the cooperation of the elastic pin and the locking groove;

[0046] S400. Finally, adjust the position of the stirrup clamp assembly. When the position of the prestressed sleeve and the stirrup clamp assembly needs to be adjusted, rotate the butterfly knob again to disengage the elastic pin from the locking groove. At this time, people can conveniently control the stirrup clamp assembly to open and readjust the position.

[0047] The present invention can effectively control the opening and closing of the opening and closing hoop by turning the butterfly knob. The arc surface of the fixed block is combined with the inner wall surface of the opening and closing hoop to form a circular clamping cavity, which tightly holds the vertical stirrups of the steel cage to ensure that it is stable and motionless. Through the cooperation of the elastic pin and the locking groove, the opening and closing hoop is firmly closed and tightly holds the vertical stirrups of the steel cage. This design not only improves the convenience and safety of operation, but also ensures the stability of the structure and the efficiency of construction, and reduces the risk of errors caused by human factors. In addition, the entire process realizes rapid locking and releasing, which facilitates the construction personnel to quickly adapt and adjust the steel cage at different construction stages, thereby improving the construction efficiency and quality, and meeting the requirements of modern construction projects for efficient and precise construction.

[0048] During the adjustment process, operators can freely select the new position of the stirrup clamp assembly according to specific construction requirements to ensure the best fit between the prestressed sleeve and the steel cage. At the same time, the flexibility of the entire adjustment process reduces construction time, improves work efficiency, and ensures that each component can be accurately positioned, thereby optimizing the stability and safety of the overall structure.

[0049] During use, the prestressed sleeve and stirrup clamp assembly are fixedly installed on both sides of the positioning plate, and the two are distributed at any angle. The positioning plate, prestressed sleeve and stirrup clamp assembly are set in the steel cage, and the stirrup clamp assembly in the closed state is tightly sleeved on the vertical stirrups of the steel cage, and the prestressed sleeve is driven to fix its position through the stirrup clamp assembly. The operator can freely adjust the height distribution of the stirrup clamp assembly and the prestressed sleeve on the positioning plate, so as to adjust the position of the prestressed sleeve. The rubber pad contacts the vertical stirrups of the steel cage, which significantly improves the anti-slip property of the stirrup clamp assembly and effectively avoids the sliding of the stirrup clamp assembly during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a construction distribution diagram of a large-span slow-bonding prestressed beam positioning device of the present invention;

[0051] Figure 2 It is a structural schematic diagram of a large-span slow-bonding prestressed beam positioning device of the present invention;

[0052] Figure 3 It is a structural schematic diagram of a stirrup clamp assembly of a large-span slow-bonding prestressed beam positioning device of the present invention;

[0053] Figure 4 It is an enlarged schematic diagram of the structure at position A of the stirrup clamp assembly of the present invention;

[0054] Figure 5 It is an enlarged schematic diagram of the structure at position B of the stirrup clamp assembly of the present invention;

[0055] Figure 6 This is a disassembled structural diagram of an opening and closing hoop and a spring shaft of a large-span slow-bonding prestressed beam positioning device of the present invention;

[0056] Figure 7 It is a schematic diagram of the three-dimensional structure of a spring shaft of a large-span slow-bonding prestressed beam positioning device of the present invention;

[0057] Figure 8 It is a structural schematic diagram of the fixing block of the present invention;

[0058] Fig. 9 It is a schematic diagram of the three-dimensional structure of the position-limiting rotating column of the present invention;

[0059] Fig.10 It is a structural diagram of another embodiment of an opening and closing hoop of a positioning device for a large-span slow-bonding prestressed beam of the present invention;

[0060] Fig.11 The invention discloses a flow chart of a construction method of a large-span slow-bonding prestressed beam positioning device.

[0061] 1. Positioning plate; 2. Screw hole; 3. Prestressed sleeve; 4. First screw; 5. Stirrup clamp assembly; 6. Second screw; 7. Locking nut; 500. Opening and closing hoop; 501. Fixing block; 502. Spring shaft; 503. Rubber pad; 504. Limiting edge strip; 505. Through groove; 506. Limiting rotating column; 507. Butterfly knob; 508. Splicing groove; 509. Avoidance hole; 510. Connecting part; 511. Limiting seat; 512. Vertical shaft; 514. Locking groove; 516. Elastic pin; 522. Spring; 526. Elastic block; 532. Resistance block; 533. Shaft hole; 534. Rotating groove; 600. Receiving groove. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0063] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11A large-span slow-bonding prestressed beam positioning device shown includes a steel cage. A positioning plate 1; a plurality of screw holes 2 are arranged along the length direction of the positioning plate 1. A sleeve assembly is arranged on one side of the positioning plate 1 and is detachably connected to the positioning plate 1; the sleeve assembly can be adjusted by disassembling and reinstalling it on the positioning plate 1 to adjust the angle. A stirrup clamp assembly 5 is arranged on the side of the positioning plate 1 away from the sleeve assembly and is detachably connected to the positioning plate 1. The end of the stirrup clamp assembly 5 away from the positioning plate 1 is sleeved on the vertical stirrup of the steel cage and is detachably connected to the vertical stirrup of the steel cage. The slow-bonding prestressed steel strand is arranged in the sleeve assembly. It should be noted here that when the angle between the sleeve assembly and the positioning plate 1 needs to be adjusted, the construction worker only needs to unscrew the locking nut 7 of the first screw 4, then rotate the sleeve assembly, adjust it to a suitable angle, and then tighten the locking nut 7. A plurality of screw holes 2 are arranged in the length direction of the positioning plate 1 to facilitate the adjustment of the height of the stirrup clamp assembly 5 and the sleeve assembly.

[0064] In some specific embodiments, a plurality of locking nuts 7 are further included for fixing the sleeve assembly and the stirrup clamp assembly 5 on the positioning plate 1 .

[0065] In some specific embodiments, the sleeve assembly includes a prestressed sleeve 3, which is arranged on one side of the positioning plate 1 and connected to the positioning plate 1. The angle between the axis of the prestressed sleeve 3 and the axis of the positioning plate 1 is 0°-180°. The first screw 4 is arranged at one end of the prestressed sleeve 3 adjacent to the positioning plate 1, and one end of the first screw 4 is fixedly connected to the prestressed sleeve 3. The end of the first screw 4 away from the prestressed sleeve 3 is arranged in the screw hole 2. It is fixed to the positioning plate 1 by a locking nut 7.

[0066] In some specific embodiments, the stirrup clamp assembly 5 includes a fixed block 501, and a second screw 6 is provided at one end of the fixed block 501 adjacent to the positioning plate 1; the fixed block 501 is fixed to the positioning plate 1 by a locking nut 7. A through groove 505, a notch groove and a splicing groove 508 are provided along the body length direction of the fixed block 501. And they are arranged on the same side. The splicing groove 508 is provided at one end of the fixed block 501 away from the second screw 6, the notch groove is provided at one end of the fixed block 501 adjacent to the second screw 6, and the through groove 505 is provided on the inner wall of the notch groove. There are two limit seats, which are respectively installed at the top and bottom ends of the splicing groove 508, and one end of the limit seat is connected to the fixed block; a round hole is provided at one end of the limit seat away from the fixed block. The spring shaft 502 is arranged in the splicing groove 508, and both ends of the spring shaft 502 pass through the round holes respectively and are installed on the limit seat. In this embodiment, two ends of the spring shaft 502 are fixed to the upper and lower limit seats 511 respectively.

[0067] In this embodiment, the stirrup clamp assembly 5 includes an opening and closing hoop 500 and a fixed block 501. A plurality of second screws 6 are provided on the outer side of the fixed block 501. The stirrup clamp assembly 5 is fixedly mounted on the positioning plate 1 through the cooperation of the second screws 6, the screw holes 2 and the locking nuts 7. A splicing groove 508 is provided on one side of the fixed block 501. The upper and lower sides of the splicing groove 508 are fixedly mounted with limit seats 511. The spring shaft 502 is fixedly mounted between the two sets of limit seats 511, and The spring shaft 502 is distributed at the position corresponding to the splicing groove 508, and the opening and closing hoop 500 is distributed in a closed shape under the elastic force of the spring shaft 502. The side of the fixing block 501 close to the opening and closing hoop 500 is an arc-shaped surface, and the inner wall surface of the opening and closing hoop 500 is fixedly glued with a rubber pad 503, and the inner arc-shaped surface of the fixing block 501 is also fixedly glued with a rubber pad 503. When the opening and closing hoop 500 is closed, the arc-shaped surface of the fixing block 501 and the inner wall surface of the opening and closing hoop 500 form a circular clamping cavity.

[0068] When in use, the prestressed sleeve 3 and the stirrup clamp assembly 5 are fixedly installed on both sides of the positioning plate 1, and the prestressed sleeve 3 and the stirrup clamp assembly 5 are distributed at any angle. The positioning plate 1, the prestressed sleeve 3 and the stirrup clamp assembly 5 are arranged in the steel cage, and the closed stirrup clamp assembly 5 is sleeved on the vertical stirrups of the steel cage. The prestressed sleeve 3 is driven to be fixed in position through the stirrup clamp assembly 5. By freely adjusting the stirrup clamp assembly 5 and the height distribution of the prestressed sleeve on the positioning plate, it is convenient to adjust the position of the prestressed sleeve 3. By rotating the prestressed sleeve 3, it can adapt to a variety of prestressed reinforcement positioning angles. The rubber pad 503 is arranged to contact the vertical stirrups of the steel cage, thereby improving the anti-slip property of the stirrup clamp assembly 5 and avoiding sliding of the stirrup clamp assembly 5 during construction.

[0069] In some specific embodiments, the spring shaft 502 includes:

[0070] The vertical shaft 512 is provided with a plurality of sets of springs 522 along the length direction of the vertical shaft 512; the springs 522 are distributed at equal distances;

[0071] There are multiple resistance blocks 532, one end of which is provided with two limiting rings. The resistance block 532 is sleeved on the vertical shaft 512 through the limiting rings. The spring 522 is arranged between the two limiting rings, and the two ends of the spring 522 are respectively connected to the limiting rings.

[0072] In some specific embodiments, the stirrup clamp assembly 5 further includes:

[0073] The opening and closing hoop 500 is in an arc shape and is arranged on the side of the fixed block 501 where the notch groove is provided, and is connected to the fixed block 501. The inner arc surface of the opening and closing hoop 500 can form a circular clamping cavity with the notch groove. A connecting portion 510 is arranged at one end of the opening and closing hoop 500 adjacent to the spring shaft 502, and the connecting portion 510 is arranged along the height and width direction of the opening and closing hoop 500; a rotating groove 534 is provided on the outer arc surface of the connecting portion 510; an axial hole 533 is provided at the top and bottom ends of the connecting portion 510, and the axial hole 533 is connected to the rotating groove. The top and bottom ends of the spring shaft 502 are rotatably connected in the axial hole 533 of the connecting portion 510 respectively.

[0074] In some specific embodiments, a side of the connection part 510 adjacent to the spring 522 is provided with an escape hole 509; there are multiple escape holes 509, which are evenly distributed along the length of the connection part 510. It should be noted that the height of the rotation slot 534 is slightly higher than the height of the fixed block, and when the end of the spring shaft 502 that escapes the limit seat is installed in the shaft hole 533, the two ends of the spring shaft 502 can be clamped in the shaft hole 533, and the opening and closing hoop 500 can rotate around the spring shaft 502.

[0075] One end of the resistance block 532 away from the spring 522 can be limited in the avoidance hole 509 .

[0076] In this embodiment, both ends of the spring shaft 502 are respectively fixed on the limit seats 511. When the opening and closing hoop 500 is subjected to force, it rotates toward the end with the spring shaft 502. At this time, the rotating groove 534 on the outside of the connecting part 510 has enough space to allow the opening and closing hoop 500 to rotate. At this time, the resistance block 532 limited in the avoidance hole 509 is forced to squeeze the spring backward, so that the spring 522 is subjected to force. When the force applied to the opening and closing hoop 500 is cancelled, the opening and closing hoop 500 is subjected to the elastic force of the spring 522 to move in the opposite direction and return to its original state.

[0077] In some specific embodiments, the stirrup clamp assembly 5 further includes a limiting edge strip 504 , which is disposed at one end of the opening and closing hoop 500 adjacent to the through slot 505 and is connected to the opening and closing hoop 500 .

[0078] A locking groove 514 is provided on one side of the limiting edge strip 504 adjacent to the through groove 505 in the length direction of the limiting edge strip 504 .

[0079] The limiting rotating post 506 is disposed in the through slot 505, and a receiving slot 600 is provided on one side of the limiting rotating post 506 adjacent to the locking slot 514;

[0080] The elastic block 526 has one end disposed in the receiving groove 600 and fixedly connected to the receiving groove 600;

[0081] The elastic pin 516 is disposed at one end of the elastic block 526 away from the receiving groove 600 and is fixedly connected to the elastic block 526;

[0082] The elastic pin 516 can be limited in the locking groove 514; the side of the elastic pin 516 adjacent to the locking groove 514 is arc-shaped;

[0083] A butterfly knob 507 is provided at the top of the limit rotating column 506 for rotating the limit rotating column 506 .

[0084] In some specific embodiments, rubber pads 503 are fixedly attached to the arc-shaped inner walls of the fixing block 501 and the opening and closing hoop 500 to prevent the stirrup clamp assembly 5 from sliding during construction.

[0085] The locking cam 514 is engaged with the locking cam 516 and the locking cam 516 is engaged with the locking cam 516. When the locking cam 514 is engaged, the locking cam 516 ...

[0086] A construction method of a large-span slow-bonding prestressed beam positioning device based on the same concept includes the following steps:

[0087] S100. First, assemble the positioning device: the prestressed sleeve 3 is fixedly installed on one side of the positioning plate 1 by the cooperation of the first screw 4, the screw hole 2 and the locking nut 7, and the stirrup clamp assembly 5 is fixedly installed on the other side of the positioning plate 1 by the cooperation of the second screw 6, the screw hole 2 and the locking nut 7. The prestressed sleeve 3 and the stirrup clamp assembly are arranged at an angle of 0°-180° to each other.

[0088] S200, secondly, fix the positioning device, and rotate the butterfly knob 507 to drive the limit rotating column 506 to rotate. When the limit rotating column 506 rotates inward, the elastic pin 516 is squeezed by the inner wall surface of the through groove 505 and contracts, thereby controlling the opening and closing hoop 500 to open. At this time, the worker pushes the opening and closing hoop 500 in the direction of the spring shaft 502, and the resistance block on the spring shaft 502 begins to squeeze the spring backward under the thrust to deform, so that the opening and closing hoop 500 and the fixing block 501 open a certain opening, and the worker puts the opening and closing hoop 500 on the vertical hoop of the steel cage;

[0089] S300, release the thrust applied to the opening and closing hoop 500, the spring starts to push the resistance block in the reverse direction under the action of its own rebound force, and then the opening and closing hoop 500 will automatically close and return to its original state under the action of the reverse thrust of the resistance block, the arc surface of the fixed block 501 and the inner wall surface of the opening and closing hoop form a circular clamping cavity to hold the vertical hoop of the steel cage, turn the butterfly knob 507 again, when the limit rotating column rotates outward to drive the elastic pin out of the through groove 505, the elastic pin 516 pops outward under the action of its own elastic force and is inserted into the locking groove 514, and the opening and closing hoop 500 is tightly closed and held tightly on the vertical hoop of the steel cage through the cooperation of the elastic pin 516 and the locking groove 514;

[0090] S400, finally adjust the position of the stirrup clamp assembly. When the position of the prestressed sleeve and the stirrup clamp assembly needs to be adjusted, rotate the butterfly knob 507 again to disengage the elastic pin from the locking groove 514. At this time, people can conveniently control the stirrup clamp assembly to open and readjust the position.

[0091] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0092] 1. In the process of fixing the positioning device, the opening and closing of the opening and closing hoop 500 can be effectively controlled by rotating the butterfly knob 507. When the butterfly knob 507 is rotated, the limit rotating column 506 rotates accordingly. When rotating inward, the elastic pin 516 is squeezed by the inner wall of the through groove 505 and shrinks, thereby releasing the opening and closing hoop 500 so that it can be smoothly sleeved on the vertical ribs of the steel cage. After releasing the force applied to the opening and closing hoop 500, the opening and closing hoop 500 will automatically close under the action of the spring shaft 502, and the arc surface of the fixed block 501 and the inner wall surface of the opening and closing hoop 500 will form a circular clamping cavity, which tightly holds the vertical ribs of the steel cage to ensure that it is stable and immovable. Turn the butterfly knob 507 again, and the limit rotating column 506 rotates outward, which will cause the elastic pin 516 to pop out from the through groove 505. The elastic pin 516 quickly pops outward under the action of its own elastic force and is inserted into the locking groove 514. Through the cooperation of the elastic pin 516 and the locking groove 514, the opening and closing hoop 500 is firmly closed and tightly holds the vertical ribs of the steel cage. This design not only improves the convenience and safety of operation, but also ensures the stability of the structure and the efficiency of construction, and reduces the risk of errors caused by human factors. In addition, the entire process achieves rapid locking and release, which facilitates the construction personnel to quickly adapt and adjust the steel cage at different construction stages, thereby improving the construction efficiency and quality, and meeting the requirements of modern construction projects for efficient and precise construction.

[0093] 2. When adjusting the position of the prestressed sleeve 3 and the stirrup clamp assembly 5, by rotating the butterfly knob 507 again, the elastic pin 516 can smoothly disengage from the locking groove 514 and release the association with the locking mechanism. This design allows the operator to easily and quickly control the opening of the stirrup clamp assembly 5, thereby achieving the repositioning of the prestressed sleeve 3. During the adjustment process, the operator can freely select the new position of the stirrup clamp assembly 5 according to specific construction requirements to ensure the best fit between the prestressed sleeve 3 and the steel cage. At the same time, the flexibility of the entire adjustment process reduces construction time, improves work efficiency, and ensures that each component can be accurately positioned, thereby optimizing the stability and safety of the overall structure.

[0094] 3. During use, the prestressed sleeve 3 and the stirrup clamp assembly 5 are fixedly installed on both sides of the positioning plate 1, and the two are distributed at an arbitrary angle. The positioning plate 1, the prestressed sleeve 3 and the stirrup clamp assembly 5 are set in the steel cage, and the stirrup clamp assembly 5 in the closed state is tightly sleeved on the vertical stirrups of the steel cage, and the prestressed sleeve 3 is driven to be fixed in position through the stirrup clamp assembly 5. The operator can freely adjust the height distribution of the stirrup clamp assembly 5 and the prestressed sleeve on the positioning plate, so as to adjust the position of the prestressed sleeve 3. The rubber pad 503 contacts the vertical stirrups of the steel cage, which significantly improves the anti-slip property of the stirrup clamp assembly 5 and effectively avoids the sliding of the stirrup clamp assembly 5 during construction.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A positioning device for a long-span slow-bonding prestressed beam, characterized in that: include: Steel cage; Positioning plate; A plurality of screw holes are arranged along the length direction of the positioning plate; A sleeve assembly is arranged on one side of the positioning plate and is detachably connected to the positioning plate; the sleeve assembly can be disassembled and reinstalled on the positioning plate to adjust the angle; A stirrup clamp assembly is arranged on a side of the positioning plate away from the sleeve assembly and is detachably connected to the positioning plate; one end of the stirrup clamp assembly away from the positioning plate is sleeved on the vertical stirrups of the steel cage and is detachably connected to the vertical stirrups of the steel cage; the slow-bonding prestressed steel strand is arranged in the sleeve assembly.

2. The large-span slow-bonding prestressed beam positioning device according to claim 1 is characterized in that: It also includes: a plurality of locking nuts for fixing the sleeve assembly and the stirrup clamp assembly on the positioning plate.

3. The large-span slow-bonding prestressed beam positioning device according to claim 2 is characterized in that: The sleeve assembly comprises: A prestressed sleeve is arranged on one side of the positioning plate and connected to the positioning plate; the angle between the axis of the prestressed sleeve and the axis of the positioning plate is 0°-180°; A first screw rod is arranged at one end of the prestressed sleeve adjacent to the positioning plate, and one end of the first screw rod is fixedly connected to the prestressed sleeve; One end of the first screw rod away from the prestressed sleeve is arranged in the screw rod hole; and is fixed to the positioning plate by the locking nut.

4. The large-span slow-bonding prestressed beam positioning device according to claim 3 is characterized in that: The stirrup clamp assembly comprises: A fixing block, wherein a second screw is disposed at one end of the fixing block adjacent to the positioning plate; the fixing block is fixed to the positioning plate by the locking nut; A through slot, a notch slot and a splicing slot are provided along the length direction of the fixing block and are arranged on the same side; There are two limit seats, which are respectively installed at the top and bottom of the splicing groove, one end of the limit seat is connected to the fixed block; a round hole is opened at one end of the limit seat away from the fixed block; A spring shaft is arranged in the splicing groove, and two ends of the spring shaft respectively pass through the circular holes and are installed on the limiting seat.

5. The large-span slow-bonding prestressed beam positioning device according to claim 4 is characterized in that: The spring shaft comprises: A vertical shaft, with multiple groups of springs sleeved along the length of the vertical shaft; the springs are distributed at equal distances; There are multiple resistance blocks, one end of which is provided with two limiting rings. The resistance block is sleeved on the vertical shaft through the limiting rings. The spring is arranged between the two limiting rings, and the two ends of the spring are respectively connected to the limiting rings.

6. The large-span slow-bonding prestressed beam positioning device according to claim 5 is characterized in that: The stirrup clamp assembly also includes: The opening and closing hoop is in an arc shape and is arranged on the side of the fixing block where the notch groove is provided; it is connected to the fixing block; the inner arc surface of the opening and closing hoop can form a circular clamping cavity with the notch groove; The end of the opening and closing hoop adjacent to the spring shaft is provided with a connecting portion, and the connecting portion is arranged along the body width direction of the opening and closing hoop; A rotation groove is provided on the outer arc surface of the connecting portion; The top and bottom ends of the connecting portion are provided with axial holes, and the axial holes are connected to the rotating groove; The top end and the bottom end of the spring shaft are rotatably connected in the shaft hole of the connecting part respectively.

7. The large-span slow-bonding prestressed beam positioning device according to claim 6 is characterized in that: A side of the connecting portion adjacent to the spring is provided with an avoidance hole; there are two avoidance holes, which are equally spaced along the length of the connecting portion; One end of the resistance block away from the spring can be limited in the avoidance hole.

8. The large-span slow-bonding prestressed beam positioning device according to claim 7 is characterized in that: The stirrup clamp assembly also includes: A limiting edge strip, arranged at one end of the opening and closing hoop adjacent to the through slot, and connected to the opening and closing hoop; A locking groove is provided on one side of the limiting edge strip body adjacent to the through groove in the length direction; A limit rotating column is arranged in the through groove, and a receiving groove is provided on a side of the limit rotating column adjacent to the locking groove; An elastic block, one end of which is disposed in the receiving groove and fixedly connected to the receiving groove; An elastic pin, arranged at one end of the elastic block away from the receiving groove and fixedly connected to the elastic block; The elastic pin can be limited in the locking groove; the side of the elastic pin adjacent to the locking groove is arc-shaped; A butterfly knob is arranged at the top end of the limit rotating column for rotating the limit rotating column.

9. The large-span slow-bonding prestressed beam positioning device according to claim 8, characterized in that: Rubber pads are fixedly attached to the arc-shaped inner walls of the fixing block and the opening and closing hoop, and are used to prevent the hoop clamp assembly from sliding during construction.

10. A construction method for a large-span slow-bonding prestressed beam positioning device, characterized in that: The following steps are involved: S100. First, assemble the positioning device: the prestressed sleeve is fixedly installed on one side of the positioning plate by the cooperation of the first screw, the screw hole and the locking nut, and the stirrup clamp assembly is fixedly installed on the other side of the positioning plate by the cooperation of the second screw, the screw hole and the locking nut, and the prestressed sleeve and the stirrup clamp assembly are arranged at an angle of 0°-180° to each other. S200, secondly, fix the positioning device, and rotate the butterfly knob to drive the limit rotating column to rotate. When the limit rotating column rotates inward, the elastic pin is squeezed by the inner wall surface of the through groove and contracts, thereby controlling the opening and closing hoop to open. At this time, the worker pushes the opening and closing hoop toward the direction of the spring shaft, and the resistance block on the spring shaft begins to squeeze the spring backward under the thrust, so that the opening and closing hoop and the fixed block open a certain opening, and the worker puts the opening and closing hoop on the vertical hoop of the steel cage; S300, release the thrust applied to the opening and closing hoop, the spring starts to push the resistance block in the reverse direction under the action of its own rebound force, and then the opening and closing hoop will automatically close and return to its original state under the action of the reverse thrust of the resistance block, the arc surface of the fixed block and the inner wall surface of the opening and closing hoop form a circular clamping cavity to hold the vertical stirrups of the steel cage, and the butterfly knob is turned again, when the limit rotating column rotates outward to drive the elastic pin to disengage from the through groove, the elastic pin pops outward under the action of its own elastic force and is inserted into the locking groove, and the opening and closing hoop is driven to close tightly and hold the vertical stirrups of the steel cage through the cooperation of the elastic pin and the locking groove; S400. Finally, adjust the position of the stirrup clamp assembly. When the prestressed sleeve and the stirrup clamp assembly need to be adjusted in position, rotate the butterfly knob again to disengage the elastic pin from the locking groove. At this time, it is convenient for people to control the stirrup clamp assembly to open, thereby readjusting the position.

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