A method for tying and positioning steel bars for large-section ultra-high transfer beams

Abstract

The present application discloses a method for tying and positioning the reinforcement of a large-section super-high conversion beam, which relates to the field of conversion beam construction. The reinforcement of the large-section super-high conversion beam is divided into three parts: the lower flange reinforcement, the web reinforcement, and the upper flange reinforcement. When the lower flange reinforcement is tied, the longitudinal reinforcement of the beam surface is supported by a reinforcement bracket, and the reinforcement bracket is connected to the lower flange formwork bracket, and is tied and fixed with the longitudinal reinforcement of the beam surface through vertical stirrups, and is tied and fixed with the stirrups through the longitudinal reinforcement of the beam bottom, while the longitudinal main reinforcement is installed on the U-shaped frame reinforcement and the cross-arm reinforcement, and the U-shaped frame reinforcement is supported on the concrete pad of the lower flange bottom formwork, and the support structure of the beam surface longitudinal reinforcement and the beam bottom longitudinal reinforcement is different from the support structure of the longitudinal main reinforcement and is separated from each other, reducing the pressure on the lower flange bottom formwork. The present application has the effect of improving the tying quality of the reinforcement of the large-section super-high conversion beam and reducing the deformation of the bottom formwork.

Description

Technical Field

[0001] The invention relates to the field of transfer beam construction, in particular to a steel bar binding and positioning construction method for a large-section ultra-high transfer beam. Background Art

[0002] One of the key points in the construction of large-section super-high transfer beams is the construction of the steel bars of the large-section super-high transfer beams. For the construction of transfer beams with smaller cross-sections, the steel beam structure is hoisted into the construction site after off-site assembly. However, due to the large cross-sectional width, high height, large span, wide width, and heavy steel bar density of large-section super-high transfer beams, it is impossible to use the method of hoisting after assembly. The steel bars of large-section super-high transfer beams are generally constructed by on-site binding.

[0003] In the related art, the construction method of the reinforcement of the large-section ultra-high conversion beam is: first set up the bottom formwork, and then tie the reinforcement from bottom to top on the bottom formwork. The reinforcement of the large-section ultra-high conversion beam is prone to improper tying, which affects the overall strength of the large-section ultra-high conversion beam. Moreover, due to the heavy weight of the reinforcement of the large-section ultra-high conversion beam, the bottom formwork is prone to deformation due to the influence of the gravity of the reinforcement for a long time during the reinforcement tying process, which affects the subsequent construction quality of the large-section ultra-high conversion beam.

[0004] With respect to the above-mentioned related technologies, the applicant believes that the following defects exist: the steel bars of large-section ultra-high transfer beams are prone to improper binding, and the bottom formwork is prone to deformation due to the influence of the gravity of the steel bars for a long time. Summary of the invention

[0005] In order to improve the binding quality of steel bars of large-section super-elevation transfer beams and reduce the deformation of the bottom formwork, the present application provides a construction method for binding and positioning steel bars of large-section super-elevation transfer beams.

[0006] The present application provides a large-section super-high transfer beam reinforcement binding and positioning construction method using the following technical solutions:

[0007] A method for tying and positioning steel bars of a large-section super-high transfer beam comprises the following steps:

[0008] Binding of lower flange reinforcement: The lower flange reinforcement uses the lower flange formwork support and the bottom formwork as the supporting structure; install concrete pads on the bottom formwork, and place U-shaped frame reinforcement on the concrete pads; install reinforcement brackets, which are arranged horizontally and connected to the lower flange formwork support at both ends through screws; use the reinforcement brackets as the supporting structure, install the beam surface longitudinal reinforcement, and install the vertical stirrups and bind and fix them with the beam surface longitudinal reinforcement; pass the beam bottom longitudinal reinforcement and bind and fix them with the stirrups; install the longitudinal main reinforcement from the bottom of the beam to the top of the beam in sequence, and install the cross arm reinforcement and weld and fix them with the U-shaped frame reinforcement, and bind and fix the longitudinal main reinforcement and the cross arm reinforcement, and the beam surface longitudinal reinforcement, beam bottom longitudinal reinforcement and longitudinal main reinforcement at both ends of the lower flange are all tied and fixed with the wall column reinforcement of the building; install vertical tension bars and vertical reinforcements used to connect the web reinforcement and bind and fix them, and the vertical reinforcement fixes the beam surface longitudinal reinforcement, beam bottom longitudinal reinforcement and longitudinal main reinforcement; remove the reinforcement bracket;

[0009] Web reinforcement binding: The web reinforcement uses the lower flange, lobby supplementary steel support and basement frame pillars as the supporting structure; install a fixing frame on the lower flange plate surface; use the fixing frame as the supporting and positioning structure, extend the vertical reinforcement and install the transverse distribution reinforcement, and tie the transverse distribution reinforcement and vertical reinforcement together; install scissor reinforcement for reinforcement; install transverse stirrups and tension reinforcement and tie them together; remove the fixing frame;

[0010] Binding of upper flange reinforcement: The upper flange reinforcement is supported by the lower flange, lobby supplementary steel support, basement frame support, upper flange bottom formwork and web; the binding method of the upper flange reinforcement is the same as that of the lower flange reinforcement.

[0011] By adopting the above technical scheme, the reinforcement of the large-section super-elevation conversion beam is divided into three parts for binding. First, the lower flange reinforcement is bound, and then the lower flange is cast; then the lower flange is used as partial support, the web reinforcement is bound, and then the web is cast; finally, the lower flange and the web are used as partial support, the upper flange reinforcement is bound, and the upper flange is cast; since the weight of the lower flange reinforcement is relatively small compared to the overall conversion beam reinforcement, the lower flange bottom formwork is less affected by the reinforcement during the binding of the lower flange reinforcement, thereby reducing the deformation of the lower flange bottom formwork, and improving the binding quality of the reinforcement and the casting quality of the lower flange of the large-section super-elevation conversion beam; after the lower flange is cast, the web reinforcement is bound, and the lower flange can support the web reinforcement, so the binding quality of the web reinforcement and the casting quality of the web of the large-section super-elevation conversion beam are improved. Similarly, the web can support the upper flange reinforcement, thereby reducing the deformation of the upper flange reinforcement and improving the upper The pouring quality of the flange; when tying the lower flange steel bars, first use steel bar brackets to support the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars. The steel bar brackets are connected to the lower flange formwork brackets. Therefore, before the steel bar brackets are removed, the gravity of the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars will basically not be transmitted to the lower flange bottom formwork. After the steel bar brackets are removed, the lower flange side formwork will be installed for pouring the lower flange. Therefore, the weight of the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars will have a short impact on the lower flange bottom formwork. Reduce the deformation of the bottom formwork; the longitudinal reinforcement on the beam surface and the longitudinal reinforcement on the beam bottom are separated from the longitudinal main reinforcement, which can reduce the influence of the longitudinal reinforcement on the beam surface and the longitudinal reinforcement on the beam bottom, improve the binding accuracy of the longitudinal main reinforcement, thereby improving the binding quality of the steel bars of the large-section ultra-high conversion beam. In addition, the longitudinal reinforcement on the beam surface, the longitudinal reinforcement on the beam bottom and the longitudinal main reinforcement at both ends of the lower flange are fixed with the wall column steel bars of the building, and cast together with the wall columns of the building, connecting the wall columns of the building and the lower flange into an integrated structure, thereby improving the casting quality of the conversion beam.

[0012] Preferably, before installing the transfer beam reinforcement, a three-dimensional model of the transfer beam reinforcement is established through BIM technology to check the collision of the reinforcement, optimize the position and spacing of the longitudinal main reinforcement, and pop up ink lines on the lower flange bottom formwork and side formwork to assist in positioning before on-site implementation.

[0013] By adopting the above technical solution, BIM technology can be used to reduce interference during the subsequent installation of steel bars, ensuring the smooth implementation of on-site steel bar installation, while the ink line can assist in controlling the accuracy of steel bar installation.

[0014] Preferably, in the lower flange reinforcement binding step, the removal of the reinforcement supports is carried out in sections. After each reinforcement support in an area is removed, the side formwork of the area is installed, and then the reinforcement supports in the next area are removed until all the reinforcement supports are removed.

[0015] By adopting the above technical solution, the shaking of the lower flange steel bars after the steel bar support is removed can be reduced, and the steel bars can be limited and fixed in the lateral direction through the side formwork.

[0016] Preferably, when the lower flange reinforcement is tied, a positioning device is used to transversely position the beam surface longitudinal reinforcement, the beam bottom longitudinal reinforcement and the longitudinal main reinforcement, and the positioning device is installed on the lower flange bottom template.

[0017] By adopting the above technical solution, the positioning device improves the transverse binding accuracy of the beam surface longitudinal reinforcement, the beam bottom longitudinal reinforcement and the longitudinal main reinforcement, thereby improving the binding quality of the conversion beam steel bars.

[0018] Preferably, the positioning device includes a guide assembly, a moving assembly and a positioning assembly, the guide assembly is installed on the lower flange bottom template and is arranged along the longitudinal direction of the lower flange, the moving assembly is installed on the guide assembly and can slide along the extension direction of the guide assembly, and the positioning assembly is installed on the moving assembly and can move laterally along the lower flange.

[0019] By adopting the above technical solution, the moving component drives the positioning component to move along the guide component. Each time the longitudinal reinforcement of the beam surface, the longitudinal reinforcement of the beam bottom and the longitudinal main reinforcement are tied, the positioning component is first moved to the binding position, and the bound longitudinal reinforcement of the beam surface, the longitudinal reinforcement of the beam bottom and the longitudinal main reinforcement are transversely positioned, thereby improving the binding quality of the conversion beam steel bars.

[0020] Preferably, the positioning assembly includes a positioning rod and a slide cylinder, the slide cylinder is installed on the moving assembly, one end of the positioning rod is fixedly connected to the slide rod, the slide rod is slidably installed in the slide cylinder, an adjusting bolt is installed on the side wall of the slide cylinder, one end of the adjusting bolt can be pressed against and disengaged from the slide rod, the positioning rod can be completely retracted into the slide cylinder, and a positioning clamp is installed on the positioning rod.

[0021] By adopting the above technical solution, the positioning clamp fixes the steel bar in an accurate position, and the positioning rod extends the positioning clamp to the steel bar. After the steel bar is tied, the positioning rod is rotated to make the positioning clamp detach from the steel bar, and then the positioning rod is retracted back into the slide tube to avoid interference between the positioning rod and the steel bar, which causes the moving assembly to be unable to move. The positioning rod and the slide tube are then brought to the next steel bar tying position by the moving assembly, and the positioning rod is extended to the steel bar tying position to position the steel bar again, and the horizontal position of the steel bar is positioned and tied in turn.

[0022] Preferably, the slide is fixedly connected to a sleeve, and the sleeve is rotatably connected to the movable component. A fastening bolt is installed on the sleeve, and one end of the fastening bolt can be pressed against and detached from the movable component. The outer wall of the sleeve is provided with a scale along the circumference of the sleeve, and the movable component is provided with an indicator line, which points to the scale.

[0023] By adopting the above technical solution, since the positioning rod needs to be retracted back into the slide, the length of the slide is longer and the width is wider when moving longitudinally, which makes it easy to hit the scaffolding and brackets near the steel bars. The direction of the slide can be rotated longitudinally through the sleeve, thereby avoiding the scaffolding and brackets near the steel bars. The scale and indicator line can position the sleeve. When reaching the next steel bar binding position, the sleeve is rotated back to its original position by aligning the indicator line with the scale, so as to facilitate extending the positioning rod to the correct position.

[0024] Preferably, the guide components are provided with two groups, and the two groups of guide components are respectively arranged on both sides of the lower flange steel bars; the movable components are provided with multiple groups, and the multiple groups of movable components are symmetrically arranged on the two groups of guide components; each sliding component arranged on the side of the lower flange steel bars facing away from the installed side formwork is respectively equipped with a group of positioning components; two laterally adjacent groups of movable components are fixedly connected to each other by a transverse connecting rod, and the transverse connecting rod spans over the lower flange steel bars; the upper ends of multiple transverse connecting rods and multiple movable components surround a cache area for temporarily storing steel bars; two longitudinally adjacent movable components are connected by a telescopic rod, and the telescopic rod is equipped with a limit bolt for limiting the telescopic length of the telescopic rod.

[0025] By adopting the above technical scheme, two groups of guide components and multiple groups of moving components make the support of the positioning component more stable. Multiple groups of moving components can improve the positioning and binding efficiency of the steel bars and facilitate the longitudinal positioning of the steel bar binding, so that the spacing between two adjacent longitudinal steel bar binding positions is basically the same, which improves the force uniformity of the steel bars, thereby improving the overall strength of the lower flange steel bars; in addition, the distance between two adjacent positioning devices can be adjusted by setting the telescopic rod, so as to adapt to the requirements of steel bar binding positions with different spacings, and it is also convenient to fold up and place the positioning device; the buffer area can be used to temporarily store the steel bars and the steel bars move with the moving components. During the steel bar binding process, it is convenient to extend the steel bars and improve the steel bar binding efficiency.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The reinforcement of the large-section super-high transfer beam is divided into three parts for tying. Since the weight of the lower flange reinforcement is smaller than that of the overall transfer beam reinforcement, the lower flange bottom formwork is less affected by the reinforcement during the tying of the lower flange reinforcement, which reduces the deformation of the lower flange bottom formwork and improves the tying quality of the reinforcement and the casting quality of the lower flange of the large-section super-high transfer beam. The tying of the web reinforcement is carried out after the casting of the lower flange. The lower flange has a higher strength and can support the web reinforcement. Therefore, the tying of the web reinforcement is more stable, with less deformation and easier positioning, which improves the tying quality of the reinforcement and the casting quality of the web of the large-section super-high transfer beam. Similarly, the web can support the upper flange steel bars, reduce the deformation of the upper flange steel bars, and improve the casting quality of the upper flange; when tying the lower flange steel bars, first use steel bar brackets to support the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars, and the steel bar brackets are connected to the lower flange formwork brackets. Therefore, before the steel bar brackets are removed, the gravity of the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars will basically not be transmitted to the lower flange bottom formwork. After the steel bar brackets are removed, the lower flange side formwork will be installed to cast the lower flange. Therefore, the weight of the beam surface longitudinal bars, vertical stirrups and beam bottom longitudinal bars has a short impact on the lower flange bottom formwork, reducing the deformation of the bottom formwork and improving the casting quality of the transfer beam.

[0028] 2. The positioning device improves the transverse binding accuracy of the beam surface longitudinal reinforcement, beam bottom longitudinal reinforcement and longitudinal main reinforcement. The moving component drives the positioning component to move along the guide component. Each time the beam surface longitudinal reinforcement, beam bottom longitudinal reinforcement and longitudinal main reinforcement are bound, the positioning component is first moved to the binding position to transversely position the bound beam surface longitudinal reinforcement, beam bottom longitudinal reinforcement and longitudinal main reinforcement, thereby improving the binding quality of the conversion beam reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flowchart of a method for tying and positioning reinforcement bars for a large-section ultra-high transfer beam according to the first embodiment of the present application.

[0030] Figure 2 It is a structural schematic diagram of the lower flange reinforcement binding of a large-section super-high transfer beam reinforcement binding positioning construction method in Example 1 of the present application.

[0031] Figure 3 It is a structural schematic diagram of the web reinforcement binding of a large-section super-high transfer beam reinforcement binding positioning construction method according to the first embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram of the upper flange reinforcement binding of a large-section super-high transfer beam reinforcement binding positioning construction method according to the first embodiment of the present application.

[0033] Figure 5 It is a structural schematic diagram of the positioning rod of the positioning device of the second embodiment of the present application in the extended state.

[0034] Figure 6 It is a structural schematic diagram of the positioning rod of the positioning device of the second embodiment of the present application in the retracted state.

[0035] Figure 7 It is a structural schematic diagram of the positioning device of Example 3 of the present application.

[0036] Description of reference numerals:

[0037] 1. Lower flange formwork support; 2. Lower flange reinforcement; 21. Concrete pad; 22. U-shaped frame reinforcement; 23. Reinforcement support; 24. Beam surface longitudinal reinforcement; 25. Vertical stirrups; 26. Beam bottom longitudinal reinforcement; 27. Longitudinal main reinforcement; 28. Cross arm reinforcement; 29. ​​Vertical reinforcement; 3. Lower flange bottom formwork; 4. Lower flange; 5. Web reinforcement; 51. Fixed frame; 52. Transverse stirrups; 6. Upper flange reinforcement; 7. Positioning device; 71. Guide assembly; 711. Guide rail; 72. Mobile Assembly; 721, sliding block; 722, column; 723, sleeve; 724, fastening bolt; 725, support tube; 726, tension bolt; 727, telescopic rod; 728, limit bolt; 729, horizontal connecting rod; 73, positioning assembly; 731, slide tube; 732, adjusting bolt; 733, positioning rod; 734, positioning clamp; 7341, positioning sleeve; 7342, positioning block; 7343, positioning bolt; 735, slide rod; 736, pull rope; 737, straight rod. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The embodiment of the present application discloses a method for tying and positioning reinforcement bars of a large-section ultra-high transfer beam.

[0040] Embodiment 1

[0041] Reference Figure 1 A method for tying and positioning steel bars of a large-section ultra-high transfer beam comprises the following steps:

[0042] Lower flange reinforcement 2 binding: refer to Figure 2, the lower flange reinforcement 2 uses the lower flange formwork support 1 and the lower flange bottom formwork 3 as the supporting structure. First, install the concrete pad 21 on the bottom formwork, and place the U-shaped frame reinforcement 22 on the concrete pad 21. The U-shaped frame reinforcement 22 is made of C25 steel bars. The U-shaped frame reinforcement 22 is distributed along the longitudinal direction and installed at intervals of 2m. The distance between two adjacent U-shaped frame reinforcements 22 is basically equal. Secondly, install the reinforcement support 23. The reinforcement support 23 includes a cross rod and two screw rods. The cross rod is horizontally arranged horizontally, and the two ends of the cross rod extend to the outside of the designed range of the lower flange reinforcement 2. The two screw rods are vertically arranged, and the upper ends of the two screw rods are respectively connected to the two ends of the cross rod, and the lower ends of the screw rods pass through the lower flange bottom formwork 3 and are connected to the lower flange formwork support 1. Thirdly, with the steel bar support 23 as the supporting structure, the beam surface longitudinal bars 24 are installed, and the vertical stirrups 25 are installed and tied and fixed with the beam surface longitudinal bars 24 at the same time. The first vertical stirrup 25 at the beam end is 50mm away from the edge of the wall column steel bar of the building body, and the vertical stirrups 25 and the U-shaped frame vertical bars 22 are staggered in the longitudinal direction. Thirdly, the longitudinal bars 26 at the bottom of the beam are passed through and tied and fixed with the stirrups, and the longitudinal main bars 27 are installed from the bottom of the beam to the top of the beam in sequence, and the cross arm steel bars 28 are installed and welded and fixed with the U-shaped frame vertical bars 22. The cross arm steel bars 28 are installed layer by layer with the longitudinal main bars 27, and the longitudinal main bars 27 and the cross arm steel bars 28 are tied and fixed. The net distance between the beam surface longitudinal bars 24, the beam bottom longitudinal bars 26 and the longitudinal main bars 27 is not less than 40mm. The beam surface longitudinal bars 24, the beam bottom longitudinal bars 26 and the longitudinal main bars 27 at both ends of the lower flange steel bar 2 are tied and fixed with the wall column steel bars of the building body. Install transverse stirrups 52 and tie bars and tie them with longitudinal main bars 27, then install vertical tie bars and vertical bars 29 for connecting web reinforcement 5 and tie them, and the vertical bars 29 tie the beam surface longitudinal bars 24, beam bottom longitudinal bars 26 and longitudinal main bars 27. Remove the steel bar brackets 23, and remove the steel bar brackets 23 in sections. After removing each steel bar bracket 23 in a section, install the side formwork of the section and seal the hole left in the lower flange bottom formwork 3 after removing the steel bar bracket 23, and then remove the steel bar brackets 23 in the next section until all steel bar brackets 23 are removed.

[0043] Web reinforcement 5 binding: refer to Figure 3 , the flange 4 below the web reinforcement 5, the lobby supplementary steel support and the frame support of the basement are used as the supporting structure; the fixing frame 51 is installed on the plate surface of the lower flange 4, and the fixing frame 51 is longitudinally fixed to connect the vertical reinforcements 29; the fixing frame 51 is used as the supporting and positioning structure, the vertical reinforcements 29 are extended and the transverse distribution reinforcement is installed, the vertical reinforcements 29 are extended by welding, the joint rate is not more than 50%, and the length of the joint connection section is ≥500mm, the transverse distribution reinforcement is welded to fix the vertical reinforcement 29, and the transverse distribution reinforcement is tied and fixed to the vertical reinforcement 29. Install scissor reinforcement for reinforcement, install transverse stirrups 52 and tension reinforcement and tie and fix them. Remove the fixing frame 51, and then install the casting formwork.

[0044] Upper flange reinforcement 6 binding: refer to Figure 4 The upper flange reinforcement 6 is supported by the lower flange 4, the lobby supplementary steel support, the basement frame support, the upper flange bottom formwork and the web. The binding method of the upper flange reinforcement 6 is the same as that of the lower flange reinforcement 2.

[0045] To ensure smooth implementation of on-site steel bar installation, a three-dimensional model of the transfer beam steel bars is established through BIM technology before the installation of the transfer beam steel bars to check the collision of the steel bars, optimize the position and spacing of the longitudinal main bars 27, and pop up ink lines on the lower flange bottom formwork 3 and the side formwork before on-site implementation to assist in controlling the steel bar installation accuracy.

[0046] The crossbar is made of double-jointed 48×3mm ordinary steel pipes, which are arranged at intervals of 2.4m in the longitudinal direction. A support plate is provided at the upper end of the screw rod. The crossbar is supported by the support plate, and the height of the support plate is adjusted. After the installation elevation of the beam surface longitudinal reinforcement 24 is fixed, the vertical stirrups 25 are then installed. After the steel skeleton is tied and formed, the support plate is rotated to lower the crossbar and pull out the crossbar. When tying the beam reinforcement, square wood + templates are used to assemble the working platform and fully spread on the horizontal bars of the brackets on both sides of the beam to facilitate the operation of the reinforcement workers. The beam surface longitudinal reinforcement 24 of the upper flange reinforcement 6 is supported in the same way.

[0047] The implementation principle of the large-section super-high conversion beam reinforcement binding and positioning construction method of the present application embodiment is as follows: the large-section super-high conversion beam reinforcement is divided into three parts, namely, the lower flange reinforcement 2, the web reinforcement 5 and the upper flange reinforcement 6, and is bound separately. Since the weight of the lower flange reinforcement 2 is relatively small relative to the overall conversion beam reinforcement, the lower flange bottom template 3 is less affected by the reinforcement during the binding of the lower flange reinforcement 2, and the deformation of the lower flange bottom template 3 can be reduced. The web reinforcement 5 is partially supported by the lower flange 4 after casting, and the lower flange 4 after casting is firm and stable, so the support of the web reinforcement 5 is relatively stable, the deformation is small, and the positioning is relatively easy. Similarly, the upper flange reinforcement 6 is bound after the floating plate is cast, and the web after casting can support the upper flange reinforcement 6, reducing the deformation of the upper flange reinforcement 6. When tying the lower flange steel bars 2, the steel bar bracket 23 is first used to support the beam surface longitudinal bars 24, the vertical stirrups 25 and the beam bottom longitudinal bars 26. The steel bar bracket 23 is connected to the lower flange formwork bracket 1. Therefore, before the steel bar bracket 23 is removed, the gravity of the beam surface longitudinal bars 24, the vertical stirrups 25 and the beam bottom longitudinal bars 26 will basically not be transmitted to the lower flange bottom formwork 3. After the steel bar bracket 23 is removed, the lower flange side formwork will be installed to cast the lower flange 4. The weight of the beam surface longitudinal bars 24, the vertical stirrups 25 and the beam bottom longitudinal bars 26 has a short impact on the lower flange bottom formwork 3, reducing the deformation of the bottom formwork. The beam surface longitudinal bars 24 and the beam bottom longitudinal bars 26 are separated from the longitudinal main bars 27, which can reduce the influence of the beam surface longitudinal bars 24 and the beam bottom longitudinal bars 26 on the longitudinal main bars 27, improve the binding accuracy of the longitudinal main bars 27, and thus improve the binding quality of the steel bars of the large-section ultra-high conversion beam.

[0048] Embodiment 2

[0049] Reference Figure 5 and Figure 6 , which is different from the first embodiment, when the lower flange reinforcement 2 and the upper flange reinforcement 6 are tied, the positioning device 7 is used to transversely position the beam surface longitudinal reinforcement 24, the beam bottom longitudinal reinforcement 26 and the longitudinal main reinforcement 27, and the positioning device 7 is installed on the lower flange bottom template 3. The positioning device 7 includes a guide component 71, a moving component 72 and a positioning component 73, the guide component 71 is installed on the lower flange bottom template 3 and is arranged along the longitudinal direction of the lower flange reinforcement 2, the moving component 72 is installed on the guide component 71 and can slide along the extension direction of the guide component 71, the positioning component 73 is installed on the moving component 72 and can move transversely along the lower flange reinforcement 2, and the moving component 72 can drive the positioning component 73 to rise and fall.

[0050] The guide assembly 71 includes a guide rail 711, which is arranged on the side of the lower flange reinforcement 2 where the side formwork is not installed. The guide rail 711 is fixed to the lower flange bottom formwork 3 by glue. After the lower flange reinforcement 2 is tied, the guide rail 711 can be removed from the lower flange bottom formwork 3 by knocking it to one side with a hammer.

[0051] The moving assembly 72 includes a sliding block 721, a column 722, a sleeve 723 and a support tube 725. The sliding block 721 is installed on the guide rail 711 and can move along the guide rail 711. The column 722 is vertically arranged, and the lower end of the column 722 is fixedly connected to the sliding block 721. The positioning assembly 73 is installed on the column 722. The sleeve 723 is sleeved on the outside of the column 722. The sleeve 723 can rotate and slide. The sleeve 723 is used to provide support for the positioning assembly 73 and drive the positioning assembly 73 to rise, fall and rotate. A fastening bolt 724 is installed on the outer wall of the sleeve 723. One end of the fastening bolt 724 can be pressed against and separated from the column 722. Loosening the fastening bolt 724 makes the fastening bolt 724 separate from the column 722. The sleeve 723 can rotate and slide. Rotating the fastening bolt 724 makes the fastening bolt 724 press against the column 722. The sleeve 723 and the column 722 are fixed to each other. The support tube 725 is arranged below the sleeve 723 and abuts against the lower end of the sleeve 723. The support tube 725 is sleeved outside the column 722. The outer wall of the support tube 725 is installed with a tension bolt 726. By rotating the tension bolt 726, the support tube 725 can be fixed and movably connected to the column 722. The support tube 725 is used to maintain the height of the sleeve 723 from falling. The outer wall of the sleeve 723 is provided with scales along the circumference of the sleeve 723. The column 722 is provided with a vertical indicator line, which can coincide with all the scales. The scales and the indicator line are used to visually observe the rotation angle of the sleeve 723. The scales coincident with the indicator line indicate the rotation angle of the sleeve 723 relative to the original position.

[0052] The positioning assembly 73 includes a positioning rod 733 and a slide 731. The slide 731 is fixedly connected to the outer wall of the sleeve 723. The central axis of the sleeve 723 and the central axis of the slide 731 are perpendicular to each other. The slide 731 provides support for the positioning rod 733 and provides a space for the positioning rod 733 to expand and contract. One end of the positioning rod 733 is fixedly connected to a slide 735. The diameter of the slide 735 is equal to the inner diameter of the slide 731. The slide 735 is slidably installed in the slide 731. An adjusting bolt 732 is installed on the side wall of the slide 731. The adjusting bolt 732 is arranged at one end of the slide 731 in the direction of extension of the positioning rod 733. One end of the adjusting bolt 732 can be pressed against and separated from the slide rod 735. Loosening the adjusting bolt 732 allows the adjusting bolt 732 to be separated from the slide rod 735, and the slide rod 735 can slide in the slide 731. Tightening the adjusting bolt 732 allows the adjusting bolt 732 to be pressed against the slide rod 735, and the slide rod 735 is fixed relative to the slide 731. The positioning rod 733 can be completely retracted into the slide 731. A plurality of positioning clips 734 are installed on the positioning rod 733. The plurality of positioning clips 734 are arranged at intervals along the axial direction of the positioning rod 733. The positioning clamp 734 includes a positioning sleeve 7341, which is sleeved outside the positioning rod 733 and can slide and rotate on the positioning rod 733. Two positioning blocks 7342 are installed on the upper part of the positioning sleeve 7341, and the steel bar is placed between the two positioning blocks 7342 and is restricted. A positioning bolt 7343 is installed on one side of the positioning sleeve 7341, and the positioning bolt 7343 can be pressed against and separated from the positioning rod 733. Loosening the positioning bolt 7343 makes the positioning bolt 7343 separate from the positioning rod 733, and the position of the positioning sleeve 7341 can be adjusted. Tightening the positioning bolt 7343 makes the positioning bolt 7343 pressed against the positioning rod 733, and the positioning sleeve 7341 and the positioning rod 733 are fixed to each other, so that the position of the positioning clamp 734 can be adjusted, which is suitable for steel bar binding with different positioning positions. To facilitate the control of the extension length of the positioning rod 733, a pull rope 736 is fixedly connected to the end of the sliding rod 735 facing away from the positioning rod 733, and a straight rod 737 is tied to the pull rope 736. The length of the straight rod 737 is greater than the outer diameter of the slide cylinder 731. When the straight rod 737 is against one end of the slide cylinder 731, it means that the positioning rod 733 is extended into place. The extension length of the positioning rod 733 can be adjusted by adjusting the length of the pull rope 736, thereby meeting different positioning position requirements; at the same time, the pull rope 736 and the straight rod 737 facilitate the retraction of the positioning rod 733.

[0053] The implementation principle of the above embodiment is: before tying the steel bars, first adjust the height and angle of the sleeve 723 and the support tube 725, then adjust the spacing and position of the positioning sleeve 7341, and finally adjust the length of the pull rope 736. When tying the steel bars, extend the positioning rod 733 to the longitudinal side of the steel bar tying position, extend the positioning rod 733 to the position, and then place the steel bar into the positioning clamp 734. At this time, the transverse position of the steel bar is the designed position, and the steel bar is tied. After the steel bar is tied, the positioning rod 733 is rotated so that the positioning clamp 734 is rotated to the bottom of the positioning rod 733, and the steel bar is separated from the positioning clamp 734. The straight rod 737 is held and the slide bar 735 is pulled back to shrink the positioning rod 733 back into the slide cylinder 731, and then the fastening bolt 724 is loosened, the slide cylinder 731 and the positioning rod 733 are rotated to the longitudinal direction, and the moving assembly 72 and the positioning assembly 73 are pushed forward to move to the next steel bar tying position, and then the slide cylinder 731 and the positioning rod 733 are rotated to the positioning angle, and the positioning rod 733 is extended to the position, and the cycle is repeated to tie the steel bar of the layer. After tying a layer of steel bars, the height and angle of the sleeve 723 and the support cylinder 725 are adjusted first, and then the spacing and position of the positioning sleeve 7341 are adjusted, and finally the length of the pull rope 736 is adjusted, and then the next layer of steel bars is tied. The lateral accuracy of the steel bar tying is improved, thereby improving the strength of the lower flange steel bar 2.

[0054] Embodiment 3

[0055] Reference Figure 7, which is different from the second embodiment in that two guide rails 711 are provided, and the two guide rails 711 are respectively provided on both sides of the lower flange reinforcement 2, and the two guide rails 711 are parallel to each other. There are multiple groups of moving components 72, and the multiple groups of moving components 72 are symmetrically installed on the two groups of guide components 71. Each sliding component provided on the side of the lower flange reinforcement 2 facing the uninstalled side formwork is installed with a group of positioning components 73, while the sliding components installed on the side of the lower flange reinforcement 2 facing the installed side formwork are not installed with positioning components 73, so as to avoid interference between the installed side formwork and the positioning components 73. The two groups of moving components 72 adjacent to each other in the transverse direction are fixedly connected to each other by a transverse connecting rod 729, and the transverse connecting rod 729 horizontally spans over the upper side of the lower flange reinforcement 2. Two longitudinally adjacent mobile assemblies 72 are connected by a telescopic rod 727, and a limit bolt 728 is installed on the telescopic rod 727 for limiting the telescopic length of the telescopic rod 727. By loosening the limit bolt 728, the length of the telescopic rod 727 can be adjusted; by tightening the limit bolt 728, the telescopic rod 727 is fixed and the length remains unchanged. The telescopic rod 727 is arranged horizontally, and one end of the telescopic rod 727 is hinged to the column 722 of one group of mobile assemblies 72, and the other end of the telescopic rod 727 is detachably fixedly connected to the column 722 of the other group of mobile assemblies 72. By disassembling the connection between the telescopic rod 727 and the column 722 of one group of mobile assemblies 72, the two longitudinally adjacent groups of mobile assemblies 72 can be separated, which is convenient for transportation and storage of the positioning device 7. The upper ends of multiple horizontal connecting rods 729 and multiple columns 722 are surrounded to form a buffer area for temporarily storing steel bars. During the steel bar binding process, some of the steel bars to be bound later can be placed in the buffer area in advance. As the moving component 72 moves forward, it is convenient for the subsequent binding of steel bars.

[0056] The implementation principle of the above embodiment is: during the process of tying steel bars, multiple people can perform tying together, and each group of positioning components 73 corresponds to one worker, thereby improving the tying efficiency. After the tying position positioned by the positioning device 7 is completed, when the positioning device 7 moves to the next tying position, the last group of positioning components 73 in the forward direction is moved to the frontmost position of the last tying positioning position, thereby completing the longitudinal positioning of the steel bar tying, so that the spacing between two adjacent longitudinal steel bar tying positions is basically the same, improving the force uniformity of the steel bars, and thus improving the overall strength of the lower flange steel bars 2.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for tying and positioning steel bars for large-section ultra-high transfer beams, characterized in that: The steps include: Binding of lower flange steel bars (2): the lower flange steel bars (2) are supported by the lower flange formwork support (1) and the lower flange bottom formwork (3); a concrete pad (21) is installed on the bottom formwork, and a U-shaped frame reinforcement (22) is placed on the concrete pad (21); a steel bar support (23) is installed, the steel bar support (23) is arranged horizontally and both ends are connected to the lower flange formwork support (1) by screws; with the steel bar support (23) as the supporting structure, the beam surface longitudinal reinforcement (24) is installed, and the vertical stirrups (25) are installed and tied to the beam surface longitudinal reinforcement (24); the longitudinal reinforcement (26) is passed through the bottom of the beam and tied to the stirrups; Install longitudinal main reinforcement (27) from the bottom of the beam to the top of the beam in sequence, install cross arm reinforcement (28) and weld it to the U-shaped frame reinforcement (22), tie and fix the longitudinal main reinforcement (27) and cross arm reinforcement (28), tie and fix the beam surface longitudinal reinforcement (24), beam bottom longitudinal reinforcement (26) and longitudinal main reinforcement (27) at both ends of the lower flange reinforcement (2) to the wall column reinforcement of the building body; install vertical tension reinforcement and vertical reinforcement (29) for connecting the web reinforcement (5) and tie and fix them, and the vertical reinforcement (29) fixes and binds the beam surface longitudinal reinforcement (24), beam bottom longitudinal reinforcement (26) and longitudinal main reinforcement (27); remove the reinforcement bracket (23); Binding of web reinforcement (5): The web reinforcement (5) is supported by the lower flange (4), the lobby supplementary steel support and the frame support of the basement; a fixing frame (51) is installed on the plate surface of the lower flange (4); the fixing frame (51) is used as a supporting and positioning structure, the vertical reinforcement (29) is extended and the transverse distribution reinforcement is installed, and the transverse distribution reinforcement is tied and fixed with the vertical reinforcement (29); scissor reinforcement is installed for reinforcement; transverse stirrups (52) and tension reinforcement are installed and tied and fixed; the fixing frame (51) is removed; Binding of upper flange reinforcement (6): The upper flange reinforcement (6) is supported by the lower flange (4), the lobby supplementary steel support, the frame support of the basement, the upper flange bottom formwork and the web; the binding method of the upper flange reinforcement (6) is the same as the binding method of the lower flange reinforcement (2).

2. A method for tying and positioning steel bars for a large-section super-high transfer beam according to claim 1, characterized in that: Before installing the transfer beam reinforcement, a three-dimensional model of the transfer beam reinforcement is established through BIM technology to check the collision of the reinforcement, optimize the position and spacing of the longitudinal main reinforcement (27), and pop up ink lines on the lower flange bottom formwork (3) and the side formwork to assist in positioning before on-site implementation.

3. A method for tying and positioning steel bars for a large-section super-high transfer beam according to claim 1, characterized in that: In the step of binding the lower flange steel bars (2), the removal of the steel bar brackets (23) is carried out in sections. After each steel bar bracket (23) in a section is removed, the side formwork of the section is installed, and then the steel bar brackets (23) in the next section are removed, until all the steel bar brackets (23) are removed.

4. The method for tying and positioning steel bars of a large-section super-high transfer beam according to claim 1 is characterized in that: When the lower flange reinforcement (2) is tied, a positioning device (7) is used to transversely position the beam surface longitudinal reinforcement (24), the beam bottom longitudinal reinforcement (26) and the longitudinal main reinforcement (27), and the positioning device (7) is installed on the lower flange bottom template (3).

5. A method for tying and positioning reinforcement bars for a large-section super-high transfer beam according to claim 4, characterized in that: The positioning device (7) comprises a guide component (71), a moving component (72) and a positioning component (73); the guide component (71) is mounted on the lower flange bottom template (3) and is arranged along the longitudinal direction of the lower flange reinforcement (2); the moving component (72) is mounted on the guide component (71) and can slide along the extension direction of the guide component (71); and the positioning component (73) is mounted on the moving component (72) and can move along the transverse direction of the lower flange reinforcement (2).

6. A method for tying and positioning reinforcement bars for a large-section super-high transfer beam according to claim 5, characterized in that: The positioning assembly (73) includes a positioning rod (733) and a slide cylinder (731), wherein the slide cylinder (731) is installed on the moving assembly (72), one end of the positioning rod (733) is fixedly connected to a slide rod (735), and the slide rod (735) is slidably installed in the slide cylinder (731), and an adjusting bolt (732) is installed on the side wall of the slide cylinder (731), one end of the adjusting bolt (732) can be pressed against and detached from the slide rod (735), and the positioning rod (733) can be completely retracted into the slide cylinder (731), and a positioning clamp (734) is installed on the positioning rod (733).

7. A method for tying and positioning reinforcement bars for a large-section super-high transfer beam according to claim 6, characterized in that: The slide cylinder (731) is fixedly connected to a sleeve (723), and the sleeve (723) is rotatably connected to the moving component (72) and slidably connected to the moving component (72). A fastening bolt (724) is installed on the sleeve (723), and one end of the fastening bolt (724) can be pressed against and detached from the moving component (72). The outer wall of the sleeve (723) is provided with a scale along the circumference of the sleeve (723), and the moving component (72) is provided with an indicator line, and the indicator line points to the scale.

8. The method for tying and positioning reinforcement bars of a large-section super-high transfer beam according to claim 5 is characterized in that: The guide assembly (71) is provided with two groups, and the two groups of guide assemblies (71) are respectively arranged on both sides of the lower flange steel bar (2). The movable assembly (72) is provided with multiple groups, and the multiple groups of movable assemblies (72) are symmetrically arranged on the two groups of guide assemblies (71). Each movable assembly (72) arranged on the side of the lower flange steel bar (2) facing away from the installed side formwork is respectively installed with a group of positioning assemblies (73). The two groups of movable assemblies (72) adjacent to each other in the transverse direction are fixedly connected to each other through a transverse connecting rod (729), and the transverse connecting rod (729) passes over the top of the lower flange steel bar (2). The upper ends of the multiple transverse connecting rods (729) and the multiple groups of movable assemblies (72) surround a buffer area for temporarily storing steel bars. The two groups of movable assemblies (72) adjacent to each other in the longitudinal direction are connected by a telescopic rod (727), and the telescopic rod (727) is installed with a limit bolt (728) for limiting the telescopic length of the telescopic rod (727).

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