A detachable formwork for controlling the spacing of reinforcement cages for hollow piers

Abstract

The utility model relates to bridge construction technical field, aims at solving the problem of low reinforcing cage main reinforcement spacing precision, poor adaptability, difficult to disassemble and unable to reuse in prior art, provides a kind of reinforcing cage spacing control detachable jig for hollow pier column, including support adjusting assembly, the top of support adjusting assembly is equipped with several interval and coaxial annular positioning assembly, annular positioning assembly is connected along radial bolt support adjusting assembly;Annular positioning assembly contains inner ring component and outer ring component, both have upper semicircular arc positioning ring, lower semicircular arc positioning ring, and are connected by first Z-shaped lug, second Z-shaped lug bolt;Upper semicircular arc positioning ring outer edge, lower semicircular arc positioning ring inner edge are respectively evenly equipped with a plurality of first main reinforcement positioning slot and a plurality of second main reinforcement positioning slot.The utility model has the beneficial effects that the main reinforcement spacing can be accurately controlled, multiple specifications of reinforcing cage can be adapted, material is saved, cost is reduced, disassembly is simple, reuse is possible and construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a detachable frame for controlling the spacing of steel cages in hollow piers. Background Technology

[0002] In prefabricated construction of bridge engineering, hollow piers and cylindrical piers serve as the core load-bearing structures, and the processing quality of their reinforcing cages directly determines the mechanical properties and structural safety of the piers. Prefabricated piers involve assembly, requiring high precision in the spacing and exposed length of the reinforcing cages. Among these, the uniformity of the spacing of the main reinforcing bars is a key quality control point. If the spacing of the main reinforcing bars deviates too much, it will lead to uneven stress on the pier, easily causing cracks, reduced load-bearing capacity, and other problems, seriously affecting the overall service life of the bridge. In addition, the control of spacing and exposed length also affects the success of subsequent assembly.

[0003] Currently, there are two main methods for controlling the spacing of main reinforcement bars when fabricating steel cages on construction sites: one is the traditional marking method, where construction workers manually mark the positions of the main reinforcement bars on the raw steel bars before welding or binding them. This method relies on the precision of manual operation, is inefficient, and is greatly affected by the skill level of the construction workers, making it difficult to ensure the consistency of the spacing of the main reinforcement bars; the other is the use of fixed jigs, which define the position of the main reinforcement bars by welding positioning parts onto a pre-set frame. Although the positioning accuracy is improved, these jigs are usually custom-made structures and are only suitable for fabricating steel cages for piers of a single specification. When the construction project involves hollow piers or cylindrical piers with different diameters and different numbers of main reinforcement bars, new jigs need to be fabricated, which not only increases construction costs but also wastes materials. At the same time, the transportation and storage of jigs also occupy a lot of space, which does not meet the requirements of energy conservation, environmental protection, high efficiency and convenience in modern construction.

[0004] Furthermore, existing fixed jigs, once the steel cage is fabricated, are complex to dismantle due to their fixed structure. They often require large tools for cutting or violent dismantling, which is not only time-consuming and labor-intensive but may also damage the jig, making it unusable and further increasing construction costs. Therefore, developing a jig that can flexibly adapt to steel cages of different pier specifications, accurately control the spacing of main reinforcement bars, and is easy to dismantle and reuse has become an urgent problem to be solved in the field of prefabricated bridge construction. Utility Model Content

[0005] The present invention aims to provide a detachable frame for controlling the spacing of steel cages in hollow piers, in order to solve the problems of low accuracy in controlling the spacing of main reinforcement bars in steel cages, poor adaptability of the frame, difficulty in disassembly, and inability to be reused in the prior art.

[0006] The embodiments of this utility model are implemented as follows: This utility model provides a detachable frame for controlling the spacing of steel cages in hollow piers, which includes horizontally arranged support and adjustment components. The top of the aforementioned support adjustment assembly is provided with several detachable annular positioning components. The several annular positioning components are spaced apart from each other and coaxial. The several annular positioning components are bolted to the top of the aforementioned support adjustment assembly along their radial direction. Each of the aforementioned annular positioning components has an inner ring component and an outer ring component. Both the inner ring component and the outer ring component have an upper semi-circular arc positioning ring and a lower semi-circular arc positioning ring. The diameter of the upper semi-circular arc positioning ring is smaller than the diameter of the lower semi-circular arc positioning ring. A first Z-shaped lug and a second Z-shaped lug are bolted between the upper semi-circular arc positioning ring and the lower semi-circular arc positioning ring. The outer edge of the upper semicircular positioning ring and the inner edge of the lower semicircular positioning ring are respectively provided with a number of first main rib positioning slots and a number of second main rib positioning slots.

[0007] In use, first, select the corresponding size of the above-mentioned annular positioning components according to the specifications of the hollow pier column reinforcement cage to be processed. Both the inner ring component and the outer ring component are composed of an upper semi-circular arc positioning ring and a lower semi-circular arc positioning ring spliced ​​together. During splicing, the upper semi-circular arc positioning ring and the lower semi-circular arc positioning ring are connected end-to-end using the first Z-shaped ear plate and the second Z-shaped ear plate in conjunction with bolts to form the complete inner ring component and the outer ring component. Simultaneously, install the support adjustment component on the construction ground and adjust it to be level. Then, fix the assembled inner ring component, outer ring component, and support adjustment component with bolts. Finally, place the main reinforcement bars of the reinforcement cage into the first main reinforcement positioning slot on the inner ring component and the second main reinforcement positioning slot on the outer ring component, respectively. Within the slot, the radial positioning and spacing control of the main reinforcement bars are achieved using the slot. Depending on the length of the reinforcement cage, 3-5 sets of the assembled annular positioning components are spaced at intervals in the processing area to fix the main reinforcement bars at multiple points. Then, the stirrups are tied or welded. After the reinforcement cage is processed, the connecting bolts between the support adjustment component and the annular positioning component are removed, followed by the bolts at the first Z-shaped ear plate and the second Z-shaped ear plate. The upper and lower semi-circular positioning rings are then separated, and each component is removed from the inside of the reinforcement cage. If different specifications of reinforcement cages need to be processed, the corresponding inner ring component and outer ring component are replaced, or the installation spacing of the first and second main reinforcement bar positioning slots is adjusted. The jig is then reassembled for reuse.

[0008] This embodiment discloses a detachable jig for controlling the spacing of steel reinforcement cages in hollow piers. By employing detachable and assembled annular positioning components and support adjustment components, and with the annular positioning components having first and second main reinforcement positioning slots adapted to various common main reinforcement specifications, it can precisely control the spacing of the main reinforcement bars in the steel reinforcement cage. It flexibly adapts to the processing of hollow pier steel reinforcement cages of various diameters and multiple main reinforcement bars. Furthermore, the components are detachably connected by bolts, facilitating worker assembly and disassembly without the need for forceful disassembly. The components are reusable, significantly reducing construction costs and material waste, and saving transportation and storage space. It effectively solves the problems of low main reinforcement spacing control accuracy, poor jig adaptability, difficult disassembly, and lack of reusability in existing technologies. This meets the requirements of high efficiency, energy saving, and high quality in the construction of prefabricated bridge hollow piers. Therefore, this detachable jig for controlling the spacing of steel reinforcement cages in hollow piers offers the beneficial effects of high precision in controlling the spacing of the main reinforcement bars, adaptability to various specifications of pier steel reinforcement cages, material saving, cost reduction, easy jig disassembly, improved construction efficiency, and reusability.

[0009] Optionally: the upper semicircular arc-shaped positioning ring of the inner ring assembly has a first positioning ring body, a second positioning ring body and a third positioning ring body, and the lower semicircular arc-shaped positioning ring of the inner ring assembly has a fourth positioning ring body, a fifth positioning ring body and a sixth positioning ring body. The first positioning ring body, the second positioning ring body, and the third positioning ring body are all bolted with first connecting lugs at their ends, and the fourth positioning ring body, the fifth positioning ring body, and the sixth positioning ring body are all bolted with second connecting lugs at their ends.

[0010] This design allows for modular disassembly and assembly of the inner ring components. For processing rebar cages of different diameters, only a single positioning ring of the corresponding size needs to be replaced, eliminating the need to remanufacture the entire inner ring component, significantly reducing construction costs and material waste. Furthermore, the bolted first and second connecting lugs enable rapid disassembly of the inner ring components after rebar cage processing, avoiding the problem of violent disassembly in traditional fixed structures. This improves disassembly efficiency and reduces component damage, ensuring that the first, second, third, fourth, fifth, and sixth positioning rings can be reused for multiple batches and specifications of rebar cages, extending the service life of the jig and meeting the high-efficiency and energy-saving requirements of prefabricated bridge construction.

[0011] Optionally: the upper semicircular arc-shaped positioning ring of the outer ring assembly has a seventh positioning ring body, an eighth positioning ring body and a ninth positioning ring body, and the lower semicircular arc-shaped positioning ring of the outer ring assembly has a tenth positioning ring body, an eleventh positioning ring body and a twelfth positioning ring body. The first and last connections of the seventh, eighth, and ninth positioning ring bodies are all bolted with third connecting lugs, and the first and last connections of the tenth, eleventh, and twelfth positioning ring bodies are all bolted with fourth connecting lugs.

[0012] This modular design allows for the disassembly and assembly of the outer ring components. For the processing needs of prefabricated hollow bridge pier cylindrical rebar cages of different diameters, only the corresponding size of the single positioning ring body needs to be replaced, eliminating the need to remanufacture the entire outer ring component. This significantly reduces material waste and lowers construction costs. The bolted third and fourth connecting lugs allow for quick disassembly of the outer ring components after the rebar cage processing is complete, avoiding the need for forceful disassembly required by traditional fixed jigs. This improves disassembly efficiency and reduces component damage. It ensures that the seventh, eighth, ninth, tenth, eleventh, and twelfth positioning ring bodies can be reused for multiple batches and specifications of rebar cage processing, extending the jig's service life and meeting the requirements of high efficiency and energy saving in prefabricated bridge construction. Furthermore, it can collaborate with other detachable components of the jig, further enhancing the overall jig's flexibility and adaptability.

[0013] Optionally, the upper and lower semicircular positioning rings of the inner ring assembly and the outer ring assembly are provided with a plurality of bolt holes, which are evenly distributed along the circumferential direction of the inner ring assembly and the outer ring assembly.

[0014] With this configuration, the evenly distributed bolt holes allow the annular positioning component to be freely bolted onto the support and adjustment component, thereby forming a frame that is flexible, versatile, and convenient for binding the reinforcing cage.

[0015] Optionally, the above-mentioned support adjustment assembly has a base frame, and the bottom of the base frame has a plurality of leveling feet for adjusting the level.

[0016] This configuration allows the base frame to provide a stable foundation for the support and adjustment components, enhancing the overall stability of the support structure and preventing tilting of the frame due to uneven stress on the support columns. The adjustable feet can specifically adjust the height of various parts of the base frame, quickly leveling the frame and ensuring the annular positioning components remain horizontal. This guarantees the circumferential spacing accuracy of the main reinforcement bars in the steel cage, avoiding positioning deviations caused by frame tilting. Furthermore, the adjustable feet allow the frame to adapt to uneven ground conditions, eliminating the need for additional high-precision leveling and reducing pre-construction preparation. This aligns with the efficient and precise operational requirements of prefabricated bridge construction and, combined with the frame's detachable and reusable nature, further enhances its on-site applicability and ease of use.

[0017] Optionally: The bottom frame is vertically connected to a height adjustment rod at the position of each of the above-mentioned annular positioning components, and the height adjustment rod is provided with a plurality of through holes, which are evenly distributed along the axial direction of the height adjustment rod. The aforementioned through holes are adapted to the aforementioned bolt holes, and the aforementioned inner ring assembly and the aforementioned outer ring assembly are both connected to any of the aforementioned through holes of the aforementioned height adjustment rod by bolts.

[0018] This configuration allows for flexible adjustment of the installation height of the inner and outer ring components via the height adjustment rods and evenly distributed through holes, precisely adapting to the processing requirements of rebar cages of different heights and specifications. It eliminates the need to replace the entire support and adjustment assembly, significantly improving the adaptability of the jig to rebar cages of various sizes. Furthermore, the matching design of the through holes and bolt holes facilitates convenient height adjustment and fixing of the inner and outer ring components, eliminating the need for additional connecting parts and reducing construction complexity and cost. The vertical setting of the height adjustment rods and the bolt fixing method ensure structural stability after installation of the inner and outer ring components, preventing positioning deviations of the main reinforcement bars due to height offsets during processing. This further guarantees the accuracy of main reinforcement bar spacing control and, combined with the jig's detachable and reusable characteristics, helps improve the efficiency and quality of prefabricated bridge pier rebar cage processing.

[0019] Optionally: Support columns are welded to both sides of the bottom frame corresponding to the aforementioned annular positioning components, and the end of the support column away from the bottom frame is bolted to the bolt hole of the outer ring component.

[0020] This configuration provides symmetrical support from both sides of the annular positioning component. Combined with the bolted connection to the outer ring component, it significantly enhances the structural stability of the outer ring component and the overall jig, preventing displacement of the outer ring component due to external forces during rebar cage processing and further ensuring the positioning accuracy of the main reinforcement spacing. Furthermore, the bolted connection method maintains the jig's detachable nature, facilitating the easy assembly and disassembly of the support column and outer ring component. This allows for convenient jig disassembly and removal after rebar cage processing, and also enables quick adaptation when replacing outer ring components of different specifications without destructive disassembly of the support column, ensuring component reusability and reducing construction costs. Simultaneously, the welding fixing method of the support column ensures a firm connection to the bottom frame, meeting the dual requirements of jig stability and flexibility in prefabricated bridge pier rebar cage processing, thus contributing to improved construction efficiency and quality.

[0021] Optionally, some of the above-mentioned annular positioning components are designed in various sizes.

[0022] With this configuration, the aforementioned annular positioning components of various sizes can be directly matched to the processing scenarios of prefabricated hollow bridge pier cylindrical pier steel cages with different diameters and different main reinforcement distribution requirements, without the need to make a separate overall jig for each specification. During construction, it is only necessary to select the corresponding size of the aforementioned annular positioning components according to the specifications of the steel cage to be processed. This avoids the material waste and cost increase of traditional fixed jigs, and greatly improves the flexibility of the jig to meet the construction needs of multiple specifications. At the same time, it ensures the accuracy of main reinforcement spacing control when processing steel cages of different specifications, meeting the construction requirements of high efficiency, energy saving and reusability.

[0023] Optionally, several of the above-mentioned first main reinforcement positioning slots and several of the above-mentioned second main reinforcement positioning slots are adapted to various common main reinforcement specifications.

[0024] This configuration directly meets the positioning needs of main reinforcement bars of different diameters, eliminating the need to design and manufacture positioning slot components separately for a single main reinforcement bar specification. During construction, only the corresponding matching slot needs to be selected according to the actual main reinforcement bar specification, without replacing the entire ring positioning component. This avoids the idle jig and material waste caused by changes in main reinforcement bar specifications in traditional positioning methods, reducing construction costs. It also simplifies the jig adjustment process when processing steel cages of different specifications, improving construction efficiency. At the same time, it ensures that main reinforcement bars of various specifications can achieve precise radial positioning through several of the aforementioned first main reinforcement bar positioning slots and several of the aforementioned second main reinforcement bar positioning slots, ensuring the accuracy of main reinforcement bar spacing control and meeting the core requirements of flexible jig adaptation, reusability, and high-quality processing.

[0025] Optionally: the bottom frame has several spaced crossbeams in the transverse direction, and the end of the height adjustment rod near the bottom frame is welded or bolted to the crossbeams.

[0026] This arrangement, with its spaced-apart crossbeams, enhances the overall structural strength and load-bearing stability of the base frame, preventing deformation due to concentrated stress. It provides a stable installation foundation for the height adjustment rods, ensuring the stability of the annular positioning components connected to them and guaranteeing precise control of the main reinforcement spacing. Furthermore, the height adjustment rods are connected to the crossbeams by welding or bolting. Welding ensures a strong connection for long-term use, while bolting accommodates the detachable nature of the jig, facilitating the disassembly, replacement, and position adjustment of the height adjustment rods. This allows for flexible adaptation to the installation requirements of annular positioning components of different specifications, eliminating the need for overall modification of the base frame. This reduces construction costs and improves the flexibility of jig assembly, meeting the core requirements of jig stability, detachability, and adaptability in the fabrication of prefabricated hollow bridge pier cylindrical column reinforcement cages.

[0027] In summary, the detachable frame for controlling the spacing of steel cages in hollow piers disclosed in this utility model has the following advantages: high accuracy in controlling the spacing of the main reinforcement bars of the steel cage; adaptability of the frame to various specifications of pier steel cages; material saving; cost reduction; easy disassembly of the frame; improved construction efficiency; and reusability. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a side view of a detachable frame for controlling the spacing of steel cages in hollow piers, as described in an embodiment of the present invention. Figure 2 This is a front view of a detachable support frame for controlling the spacing of steel cages in hollow piers, as described in an embodiment of this utility model.

[0030] Icons: 1-Support adjustment component, 2-Ring positioning component, 3-Inner ring component, 4-Outer ring component, 5-Upper semi-circular positioning ring, 6-Lower semi-circular positioning ring, 7-First Z-shaped ear plate, 8-Second Z-shaped ear plate, 9-First main rib positioning slot, 10-Second main rib positioning slot, 11-First positioning ring body, 12-Second positioning ring body, 13-Third positioning ring body, 14-Fourth positioning ring body, 15-Fifth positioning ring body, 16-Sixth positioning ring body, 1 7-First connecting ear plate, 18-Second connecting ear plate, 19-Seventh positioning ring body, 20-Eighth positioning ring body, 21-Ninth positioning ring body, 22-Tenth positioning ring body, 23-Eleventh positioning ring body, 24-Twelfth positioning ring body, 25-Third connecting ear plate, 26-Fourth connecting ear plate, 27-Bolt hole, 28-Bottom frame, 29-Horizontal adjustment foot, 30-Height adjustment rod, 31-Through hole, 32-Support column, 33-Crossbeam, 34-Reinforcing cage. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Example See Figure 1 and Figure 2 This embodiment proposes a detachable frame for controlling the spacing of steel cages in hollow piers, including a horizontally arranged support adjustment assembly 1. The top of the support adjustment assembly 1 is provided with several detachable annular positioning assemblies 2. The several annular positioning assemblies 2 are spaced apart from each other and coaxial. The several annular positioning assemblies 2 are bolted to the top of the support adjustment assembly 1 along their radial direction. Several annular positioning components 2 each have an inner ring component 3 and an outer ring component 4. Both the inner ring component 3 and the outer ring component 4 have an upper semi-circular arc positioning ring 5 and a lower semi-circular arc positioning ring 6. The diameter of the upper semi-circular arc positioning ring 5 is smaller than the diameter of the lower semi-circular arc positioning ring 6. The upper semi-circular arc positioning ring 5 and the lower semi-circular arc positioning ring 6 are bolted together by a first Z-shaped ear plate 7 and a second Z-shaped ear plate 8. The outer edge of the upper semicircular positioning ring 5 and the inner edge of the lower semicircular positioning ring 6 are each provided with a number of first main rib positioning slots 9 and a number of second main rib positioning slots 10.

[0034] In use, first, select the corresponding size of the annular positioning component 2 according to the specifications of the hollow pier column rebar cage 34 to be processed. The inner ring component 3 and the outer ring component 4 are both composed of an upper semi-circular arc positioning ring 5 and a lower semi-circular arc positioning ring 6 spliced ​​together. During splicing, the upper semi-circular arc positioning ring 5 and the lower semi-circular arc positioning ring 6 are connected end to end by the first Z-shaped ear plate 7 and the second Z-shaped ear plate 8 with bolts to form a complete inner ring component 3 and outer ring component 4. At the same time, install the support adjustment component 1 on the construction ground and adjust it to be level. Then, fix the assembled inner ring component 3, outer ring component 4 and support adjustment component 1 with bolts. Then, put the main bars of the rebar cage into the first main bar positioning slot 9 on the inner ring component 3 and the second main bar positioning slot 10 on the outer ring component 4 respectively. Inside, the radial positioning and spacing control of the main reinforcement bars are achieved using the slots. According to the length of the steel cage, 3 to 5 sets of the assembled annular positioning components 2 are set at intervals in the processing area to fix the main reinforcement bars at multiple points. Then, the stirrups are tied or welded. After the steel cage is processed, the connecting bolts between the support adjustment component 1 and the annular positioning component 2 are removed first, and then the bolts at the first Z-shaped ear plate 7 and the second Z-shaped ear plate 8 are removed. The upper semi-circular positioning ring 5 and the lower semi-circular positioning ring 6 are separated and each component is taken out from the inside of the steel cage. If steel cages of different specifications need to be processed, the inner ring component 3 and the outer ring component 4 of the corresponding size are replaced or the installation spacing of the first main reinforcement positioning slot 9 and the second main reinforcement positioning slot 10 is adjusted. The jig can be reassembled and reused.

[0035] This embodiment discloses a detachable jig for controlling the spacing of steel reinforcement cages in hollow piers. It employs a detachable and assembleable annular positioning component 2 and a support adjustment component 1. The annular positioning component 2 has a first main reinforcement positioning slot 9 and a second main reinforcement positioning slot 10 adapted to various common main reinforcement specifications. This allows for precise control of the main reinforcement spacing in the steel reinforcement cage, flexibly adapting to the processing of hollow pier steel reinforcement cages of various diameters and multiple main reinforcements. Furthermore, the components are detachably connected by bolts, facilitating worker assembly and disassembly without the need for forceful disassembly. The components are reusable, significantly reducing construction costs and material waste, and saving transportation and storage space. This effectively solves the problems of low main reinforcement spacing control accuracy, poor jig adaptability, difficult disassembly, and lack of reusability in existing technologies. It meets the requirements of high efficiency, energy saving, and high quality in the construction of prefabricated bridge hollow piers. Therefore, this detachable jig for controlling the spacing of steel reinforcement cages in hollow piers offers the beneficial effects of high main reinforcement spacing control accuracy, adaptability to various specifications of pier steel reinforcement cages, material saving, cost reduction, easy jig disassembly, improved construction efficiency, and reusability.

[0036] See Figure 1 and Figure 2 The upper semi-circular arc-shaped positioning ring 5 of the inner ring assembly 3 has a first positioning ring body 11, a second positioning ring body 12 and a third positioning ring body 13, and the lower semi-circular arc-shaped positioning ring 6 of the inner ring assembly 3 has a fourth positioning ring body 14, a fifth positioning ring body 15 and a sixth positioning ring body 16. The first positioning ring body 11, the second positioning ring body 12, and the third positioning ring body 13 are all bolted to the beginning and end of each other with a first connecting ear plate 17. The fourth positioning ring body 14, the fifth positioning ring body 15, and the sixth positioning ring body 16 are all bolted to the beginning and end of each other with a second connecting ear plate 18. On the one hand, this allows for modular disassembly and assembly of the inner ring component 3. For the processing needs of steel cages of different diameters, only a single positioning ring body of the corresponding size needs to be replaced, without the need to remake the entire inner ring component 3, which greatly reduces construction costs and material waste. On the other hand, the bolted first connecting ear plate 17 and the second connecting ear plate 18 allow for quick disassembly and assembly of the inner ring component 3 after the steel cage is processed, avoiding the problem of violent disassembly of traditional fixed structures. This improves disassembly efficiency and reduces component damage, ensuring that the first positioning ring body 11, the second positioning ring body 12, the third positioning ring body 13, the fourth positioning ring body 14, the fifth positioning ring body 15, and the sixth positioning ring body 16 can be reused for processing multiple batches and specifications of steel cages, extending the service life of the jig and meeting the needs of efficient and energy-saving prefabricated bridge construction.

[0037] The upper semi-circular arc-shaped positioning ring 5 of the outer ring assembly 4 has a seventh positioning ring body 19, an eighth positioning ring body 20 and a ninth positioning ring body 21, and the lower semi-circular arc-shaped positioning ring 6 of the outer ring assembly 4 has a tenth positioning ring body 22, an eleventh positioning ring body 23 and a twelfth positioning ring body 24. The seventh positioning ring body 19, the eighth positioning ring body 20, and the ninth positioning ring body 21 are all bolted with third connecting lugs 25 at their ends. The tenth positioning ring body 22, the eleventh positioning ring body 23, and the twelfth positioning ring body 24 are all bolted with fourth connecting lugs 26 at their ends. This allows for modular disassembly and assembly of the outer ring assembly 4. For the processing requirements of prefabricated hollow bridge pier cylindrical column reinforcement cages of different diameters, only a single positioning ring body of the corresponding size needs to be replaced, without re-fabricating the entire outer ring assembly 4, significantly reducing material waste and lowering construction costs. The bolted third connecting lugs 25... The fourth connecting ear plate 26 allows for quick disassembly and separation of the outer ring component 4 after the steel cage is processed, avoiding the problem of needing to violently disassemble traditional fixed jigs. This improves disassembly efficiency and reduces component damage, ensuring that the seventh positioning ring body 19, the eighth positioning ring body 20, the ninth positioning ring body 21, the tenth positioning ring body 22, the eleventh positioning ring body 23, and the twelfth positioning ring body 24 can be reused for processing multiple batches and specifications of steel cages, extending the service life of the jig and meeting the requirements of high efficiency and energy saving in prefabricated bridge construction. At the same time, it can also work in conjunction with other detachable components of the jig to further improve the flexibility and adaptability of the overall jig.

[0038] See Figure 1 and Figure 2 The inner ring assembly 3 and the outer ring assembly 4 each have several bolt holes 27 on their upper semi-circular positioning ring 5 and lower semi-circular positioning ring 6. The bolt holes 27 are evenly distributed along the circumferential direction of the inner ring assembly 3 and the outer ring assembly 4. The evenly distributed bolt holes 27 facilitate the ring positioning assembly 2 to be bolted to the support adjustment assembly 1 at will, thereby forming a frame that is flexible and versatile, and convenient for binding the steel cage.

[0039] The support adjustment component 1 has a base frame 28, and the bottom of the base frame 28 has several horizontal adjustment feet 29 for leveling. The base frame 28 provides a stable bottom bearing foundation for the support adjustment component 1, enhances the stability of the overall support structure of the frame, and avoids the frame tilting caused by uneven force on the support column 32. The several horizontal adjustment feet 29 can adjust the height of various parts of the base frame 28 in a targeted manner, quickly adjust the frame to a horizontal state, and ensure that the annular positioning component 2 is always in a horizontal position, thereby ensuring the spacing accuracy of the main reinforcement bars along the circumferential direction and avoiding the problem of main reinforcement bar positioning deviation caused by frame tilting. At the same time, the setting of the horizontal adjustment feet 29 also allows the frame to adapt to the uneven ground environment of the construction site, without the need for additional high-precision leveling of the ground, reducing the amount of pre-construction preparation work, meeting the efficient and precise operation requirements of prefabricated bridge construction, and in conjunction with the overall detachable and reusable characteristics of the frame, further improving the on-site applicability and ease of use of the frame.

[0040] The base frame 28 is vertically connected to several annular positioning components 2, each with a height adjustment rod 30. Several through holes 31 are evenly distributed along the axial direction of the height adjustment rod 30. These through holes 31 are fitted with several bolt holes 27. Both the inner ring component 3 and the outer ring component 4 are bolted to any of the through holes 31 on the height adjustment rod 30. This allows for flexible adjustment of the installation height of the inner ring component 3 and the outer ring component 4 via the height adjustment rod 30 and the evenly distributed through holes 31, precisely adapting to the processing requirements of steel cages of different heights and specifications, without requiring replacement of the entire support adjustment component 1. The design significantly improves the adaptability of the jig to steel cages of various sizes. In addition, the matching design of the through hole 31 and the bolt hole 27 makes the height adjustment and fixing of the inner ring component 3 and the outer ring component 4 convenient, without the need for additional processing of connecting parts, reducing construction complexity and cost. The vertical setting of the height adjustment rod 30 and the bolt fixing method can ensure the structural stability of the inner ring component 3 and the outer ring component 4 after installation, avoid the positioning deviation of the main reinforcement due to height offset during processing, further ensure the accuracy of the main reinforcement spacing control of the steel cage, and at the same time, it fits the characteristics of the jig being detachable and reusable, helping to improve the efficiency and quality of prefabricated bridge pier steel cage processing.

[0041] See Figure 1 and Figure 2The bottom frame 28 has support columns 32 welded to both sides of several annular positioning components 2. The end of the support column 32 away from the bottom frame 28 is bolted to the bolt hole 27 of the outer ring component 4. The support column 32 provides symmetrical support from both sides of the annular positioning components 2. Combined with the bolt connection with the outer ring component 4, it can greatly enhance the structural stability of the outer ring component 4 and the overall jig, avoid the outer ring component 4 from shifting due to external forces during the processing of the rebar cage, and further ensure the positioning accuracy of the main reinforcement spacing. In addition, the bolt connection method continues the detachable feature of the jig, and the support column 32 and the outer ring component 4 are easy to disassemble and assemble. It is convenient to disassemble the jig after the rebar cage is processed, and it can also be quickly adapted when changing the outer ring component 4 of different specifications without destructive disassembly of the support column 32, ensuring that the components can be reused and reducing construction costs. At the same time, the welding and fixing method of the support column 32 ensures that it is firmly connected to the bottom frame 28, which meets the dual requirements of stability and flexibility of the jig for the processing of prefabricated bridge pier rebar cage, and helps to improve construction efficiency and quality.

[0042] Several ring positioning components 2 are designed in various sizes to adapt to common pier diameter specifications, including diameters of 2.4m, 2.6m, 3m, and 3.2m. The various sizes of ring positioning components 2 can directly match the processing scenarios of prefabricated hollow bridge pier cylindrical pier steel cages with different diameters and different main reinforcement distribution requirements, without the need to make a separate overall jig for each specification. During construction, it is only necessary to select the ring positioning component 2 of the corresponding size according to the specification of the steel cage to be processed. This avoids the material waste and cost increase of traditional fixed jigs, and greatly improves the flexibility of the jig to meet the construction needs of multiple specifications. At the same time, it ensures the accuracy of main reinforcement spacing control when processing steel cages of different specifications, meeting the construction requirements of high efficiency, energy saving, and reusability.

[0043] See Figure 1 and Figure 2 The system includes several first main reinforcement positioning slots 9 and several second main reinforcement positioning slots 10, which are compatible with various common main reinforcement specifications, including Φ25, Φ20, and Φ16. This directly meets the positioning needs of main reinforcements of different diameters, eliminating the need to design and manufacture positioning slot components separately for a single main reinforcement specification. During construction, only the corresponding matching slot needs to be selected according to the actual main reinforcement specification, without replacing the entire annular positioning component 2. This avoids the idle jig and material waste caused by changes in main reinforcement specifications in traditional positioning methods, reducing construction costs. It also simplifies the jig adjustment process when processing steel cages of different specifications, improving construction efficiency. At the same time, it ensures that main reinforcements of various specifications can achieve precise radial positioning through the adapted first main reinforcement positioning slots 9 and several second main reinforcement positioning slots 10, ensuring the accuracy of main reinforcement spacing control and meeting the core requirements of flexible jig adaptation, reusability, and high-quality processing.

[0044] The base frame 28 has several spaced-apart crossbeams 33. The end of the height adjustment rod 30 near the base frame 28 is welded or bolted to the crossbeams 33. The spaced-apart crossbeams 33 enhance the overall structural strength and load-bearing stability of the base frame 28, preventing deformation of the base frame 28 due to concentrated stress. This provides a stable installation foundation for the height adjustment rod 30, thereby ensuring the stability of the position of the annular positioning component 2 connected to the height adjustment rod 30 and ensuring the accuracy of the main reinforcement spacing control. In addition, the height adjustment rod 30 and the crossbeams 33 are connected by welding or bolting. Welding ensures the connection is strong for long-term use, while bolting adapts to the detachable requirements of the jig, facilitating the disassembly, replacement, and position adjustment of the height adjustment rod 30. This allows for flexible adaptation to the installation requirements of different specifications of the annular positioning component 2 without requiring overall modification of the base frame 28. This reduces construction costs and improves the assembly flexibility of the jig, meeting the core requirements of jig stability, detachability, and adaptability in the processing of prefabricated hollow bridge pier cylindrical pier reinforcement cages.

[0045] See Figure 1 and Figure 2 In this embodiment, the detachable jig for controlling the spacing of the main reinforcement bars in the cylindrical pier of the prefabricated hollow bridge pier is composed of a ring positioning component 2 and a support adjustment component 1. The ring positioning component 2 includes six symmetrically arranged 6 / 1 positioning ring bodies. Each positioning ring body is made of Q235 steel plate with a thickness of 8mm to 12mm and is designed with various sizes such as 2.4m and 2.6m in diameter. It is composed of several first main reinforcement positioning slots 9 and several second main reinforcement positioning slots 10 adapted to main reinforcement bars of Φ25, Φ20 and other specifications. Each positioning ring body is spliced ​​with a first Z-shaped ear plate 7, a second Z-shaped ear plate 8, a first connecting ear plate 17, a second connecting ear plate 18, a third connecting ear plate 25 and a fourth connecting ear plate 26 by bolts to form a complete ring, so as to accurately define the circumferential position of the main reinforcement bars in the steel cage. The support adjustment component 1 includes a support column 32 and a horizontal adjustment foot 29, which can support the ring positioning component 2 and adjust the height and level of the jig.

[0046] See Figure 1 and Figure 2 In this embodiment, the entire jig is coated with an anti-rust and anti-corrosion coating. The anti-rust and anti-corrosion coating can effectively improve the anti-rust ability of each metal component of the jig, prevent oxidation damage caused by factors such as dampness at the construction site and open-air environment, extend the service life of the jig, ensure the structural stability and positioning accuracy during long-term use, further enhance the economy and reliability of jig reuse, and meet the durability requirements of equipment in prefabricated bridge construction.

[0047] See Figure 1 and Figure 2 In this embodiment, the method of using the detachable frame for controlling the spacing of the reinforcing cage in hollow piers is as follows: First, based on the pier diameter, number of main reinforcement bars, and diameter of the main reinforcement bars corresponding to the steel cage to be processed, select the corresponding size of the annular positioning component 2 to ensure that the spacing of the first main reinforcement bar positioning slots 9 and the second main reinforcement bar positioning slots 10 meets the design requirements (e.g., if the design spacing is 150mm, then install the main reinforcement bars evenly at 150mm intervals). At the same time, install the support adjustment component 1, and adjust the annular positioning component 2 to a horizontal state using the height adjustment rod 30 and the horizontal adjustment foot 29, and fix the horizontal adjustment foot 29 to the ground. Next, place the main reinforcement bars of the steel cage one by one into the first main reinforcement bar positioning slots 9 and the second main reinforcement bar positioning slots 10 of the annular positioning component 2. The radial limit formed by the first main reinforcement bar positioning slots 9 and the second main reinforcement bar positioning slots 10 ensures that the spacing of the main reinforcement bars is uniform along the circumferential direction. Then, according to the length of the steel cage, set the following in the processing area at intervals: Multiple sets of this jig are used to position the main reinforcement bars at multiple points. Then, the stirrups are tied or welded to complete the processing of the steel cage. After the steel cage is processed, the bolts between the support adjustment component 1 and the annular positioning component 2 are removed first. Then, the connecting bolts between the first positioning ring body 11, the second positioning ring body 12, the third positioning ring body 13, the fourth positioning ring body 14, the fifth positioning ring body 15, the sixth positioning ring body 16, the seventh positioning ring body 19, the eighth positioning ring body 20, the ninth positioning ring body 21, the tenth positioning ring body 22, the eleventh positioning ring body 23, and the twelfth positioning ring body 24 are removed. Finally, the disassembled annular positioning component 2 is taken out. If steel cages of different specifications need to be processed, only the annular positioning component 2 of the corresponding size needs to be replaced or the installation spacing of the main reinforcement positioning components needs to be adjusted. The jig can then be reassembled for reuse.

[0048] See Figure 1 and Figure 2 Beneficial effects: 1. The accuracy of main reinforcement spacing control has been significantly improved; By using several first main reinforcement positioning slots 9 and several second main reinforcement positioning slots 10 evenly distributed on the annular positioning component 2, the precise positioning of the main reinforcement bars of the steel cage is achieved, avoiding the errors of traditional manual marking positioning. According to on-site measurements, the spacing deviation of the main reinforcement bars of the steel cage processed using this jig can be controlled within ±3mm, effectively ensuring the uniformity of stress on the pier column and improving structural safety.

[0049] 2. Highly flexible and adaptable, reducing construction costs; This jig adopts a modular and detachable design. By replacing the annular positioning components 2 of different sizes or adjusting the installation spacing of several first main reinforcement positioning slots 9 and several second main reinforcement positioning slots 10, it can be adapted to the processing of hollow bridge piers and cylindrical pier steel cages of various specifications with diameters of 1.0m to 2.0m and the number of main reinforcement bars of 8 to 16, without the need to make jigs separately for piers of different specifications.

[0050] 3. Easy to disassemble, improving construction efficiency; The components of the jig are connected by bolts, and the disassembly process does not require large tools or violent disassembly. Two to three construction workers can complete the disassembly and reassembly of a jig in just 30 minutes. Compared with traditional fixed jigs, the disassembly efficiency is increased by 4 to 5 times. At the same time, the disassembled jig components are small in size and light in weight, making them easy to transport and store, saving space, and are especially suitable for situations where the construction site has limited space.

[0051] 4. High reusability, extending service life; All components of the jig are made of steel, which has high structural strength and good wear resistance. After multiple disassemblies and reuses, the same jig still maintains good structural stability and positioning accuracy, without obvious deformation or damage. Its service life is much longer than that of traditional disposable jigs, which further reduces long-term construction costs.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A detachable support frame for controlling the spacing of steel cages in hollow piers, characterized in that: Includes a horizontally arranged support and adjustment assembly (1); The top of the support adjustment assembly (1) is provided with a plurality of detachable annular positioning assemblies (2), the plurality of annular positioning assemblies (2) are spaced apart from each other and coaxial, and the plurality of annular positioning assemblies (2) are bolted to the top of the support adjustment assembly (1) along their radial direction. Each of the aforementioned annular positioning components (2) has an inner ring component (3) and an outer ring component (4). The inner ring component (3) and the outer ring component (4) each have an upper semi-circular arc positioning ring (5) and a lower semi-circular arc positioning ring (6). The diameter of the upper semi-circular arc positioning ring (5) is smaller than the diameter of the lower semi-circular arc positioning ring (6). The upper semi-circular arc positioning ring (5) and the lower semi-circular arc positioning ring (6) are bolted together by a first Z-shaped ear plate (7) and a second Z-shaped ear plate (8). The outer edge of the upper semicircular arc positioning ring (5) and the inner edge of the lower semicircular arc positioning ring (6) are respectively provided with a number of first main rib positioning slots (9) and a number of second main rib positioning slots (10).

2. The detachable support frame for controlling the spacing of steel cages in hollow piers according to claim 1, characterized in that: The upper semicircular arc-shaped positioning ring (5) of the inner ring assembly (3) has a first positioning ring body (11), a second positioning ring body (12) and a third positioning ring body (13), and the lower semicircular arc-shaped positioning ring (6) of the inner ring assembly (3) has a fourth positioning ring body (14), a fifth positioning ring body (15) and a sixth positioning ring body (16). The first positioning ring body (11), the second positioning ring body (12) and the third positioning ring body (13) are all bolted with a first connecting ear plate (17) at their ends, and the fourth positioning ring body (14), the fifth positioning ring body (15) and the sixth positioning ring body (16) are all bolted with a second connecting ear plate (18) at their ends.

3. The detachable support frame for controlling the spacing of steel cages in hollow piers according to claim 1, characterized in that: The upper semicircular arc-shaped positioning ring (5) of the outer ring assembly (4) has a seventh positioning ring body (19), an eighth positioning ring body (20) and a ninth positioning ring body (21), and the lower semicircular arc-shaped positioning ring (6) of the outer ring assembly (4) has a tenth positioning ring body (22), an eleventh positioning ring body (23) and a twelfth positioning ring body (24). The seventh positioning ring body (19), the eighth positioning ring body (20) and the ninth positioning ring body (21) are all bolted with a third connecting lug (25) at their ends, and the tenth positioning ring body (22), the eleventh positioning ring body (23) and the twelfth positioning ring body (24) are all bolted with a fourth connecting lug (26) at their ends.

4. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 1, characterized in that: The inner ring assembly (3) and the outer ring assembly (4) each have a plurality of bolt holes (27) on the upper semi-circular positioning ring (5) and the lower semi-circular positioning ring (6), and the plurality of bolt holes (27) are evenly distributed along the circumferential direction of the inner ring assembly (3) and the outer ring assembly (4).

5. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 4, characterized in that: The support adjustment assembly (1) has a base frame (28) at the bottom of which are a plurality of leveling feet (29) for adjusting the level.

6. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 5, characterized in that: The bottom frame (28) is vertically connected to a height adjustment rod (30) at the position corresponding to a plurality of the annular positioning components (2). A plurality of through holes (31) are provided on the height adjustment rod (30), and the plurality of through holes (31) are evenly distributed along the axial direction of the height adjustment rod (30). A plurality of the through holes (31) are adapted to a plurality of the bolt holes (27), and the inner ring assembly (3) and the outer ring assembly (4) are both bolted to any of the through holes (31) of the height adjustment rod (30).

7. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 5, characterized in that: The bottom frame (28) has support columns (32) welded on both sides corresponding to the several annular positioning components (2). The end of the support column (32) away from the bottom frame (28) is bolted to the bolt hole (27) of the outer ring component (4).

8. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 1, characterized in that: Several of the aforementioned annular positioning components (2) are designed in various sizes.

9. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 1, characterized in that: Several first main reinforcement positioning slots (9) and several second main reinforcement positioning slots (10) are adapted to various common main reinforcement specifications.

10. A detachable support frame for controlling the spacing of reinforcing cages in hollow piers according to claim 6, characterized in that: The base frame (28) has several spaced crossbeams (33) in the transverse direction, and the height adjustment rod (30) is welded or bolted to the crossbeams (33) at one end near the base frame (28).

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