Large-span building beam-column joint core area steel bar high-precision positioning and adjusting device

Abstract

The invention relates to the technical field of building construction, in particular to a large-span building beam-column joint core area steel bar high-precision positioning and adjusting device which comprises a bottom positioning plate, and a first through groove allowing a longitudinal steel bar to penetrate through is formed in a plate body of the bottom positioning plate; at least one pouring opening is formed in a plate body of the top positioning plate and located in the corner position of the top positioning plate, and a second through groove corresponding to the first through groove is formed in the surface of the top positioning plate; according to the invention, the top positioning plate and the bottom positioning plate are arranged to accurately limit the vertical double points of the longitudinal steel bars, the clamping grooves in the fixing plate are used for horizontally clamping and positioning the transverse steel bars, and the space coordinates of all the steel bars are uniquely determined by the rigid mold, so that the millimeter-level positioning precision is realized; the shear resistance, the bending resistance and the concrete restraining capacity of a joint core area are guaranteed, in the whole process of hoisting, steel bar inserting and concrete pouring and vibrating, the frame can effectively resist impact and vibration, and the overall strength is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically proposes a high-precision positioning and adjustment device for the core area of ​​steel reinforcement in beam-column joints of large-span buildings. Background Technology

[0002] In large public buildings, industrial plants and bridge projects, the core area of ​​the beam-column joint is a critical part of the structure. The steel mesh inside is intricate and the longitudinal and transverse steel bars are densely interwoven. The construction quality of this area directly determines the overall safety and seismic performance of the structure. Before the concrete hardens, the steel skeleton in this area is only fixed by binding and a small number of temporary supports, and its own structural stiffness and stability are seriously insufficient.

[0003] In traditional construction, the intricate steel mesh relies mainly on wire binding by construction workers. The nodes provide limited connection stiffness, and the impact of pumped concrete, workers' footsteps, and the strong vibration of immersion vibrators can easily cause the entire steel skeleton to shift, deflect, or twist, affecting the load-bearing quality of the core area. Furthermore, the manual binding process relies on experience for manual measurement, visual alignment, and binding one bar at a time. This process is prone to cumulative errors and low efficiency, resulting in severe unevenness in the horizontal spacing and interlayer clearance of the steel bars. At the same time, the dense steel mesh forms a tight physical barrier, which severely hinders the flow of concrete and the insertion of the vibrator. It is also easy to form defects such as honeycomb and voids in the core area of ​​the nodes, further affecting the strength and quality.

[0004] Therefore, there is an urgent need for a high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings that can achieve high-precision positioning of reinforcing bars, provide rigid construction support, and ensure the quality of pouring. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-precision positioning and adjustment device for the reinforcing bars in the core area of ​​beam-column joints in large-span buildings, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a high-precision positioning and adjustment device for reinforcing bars in the core area of ​​a large-span building beam-column joint, comprising a bottom positioning plate with a first through groove for longitudinal reinforcing bars to pass through; a top positioning plate with at least one pouring port located at a corner of the top positioning plate, and a second through groove corresponding to the first through groove on the surface of the top positioning plate; multiple vertical mounting rods, each connected at both ends to the bottom positioning plate and the top positioning plate respectively, forming a spatial frame; multiple detachable fixing plates, each with mounting holes on its surface, which are slidably mounted on the surface of the mounting rods, and with slots on the edges of the fixing plates, where transverse reinforcing bars are secured in the slots corresponding to adjacent fixing plates; and spacer plates installed between adjacent fixing plates. On the ground, the multiple fixing plates and spacer plates are first slidably mounted on the surface of the mounting rods, then the entire assembly is hoisted to the desired position, allowing the longitudinal reinforcing bars to pass through the bottom positioning plate. Next, the fixing plates at different positions are lifted, allowing the transverse reinforcing bars to pass through the slots in the fixing plates. The top positioning plate is then installed, and finally, concrete is poured.

[0007] Preferably, the lower surface of the top positioning plate is provided with a positioning groove, and the top end of the mounting rod is provided with a snap-fit ​​part that is adapted to the positioning groove, the snap-fit ​​part being inserted into the interior of the positioning groove.

[0008] Preferably, the mounting rod and the bottom positioning plate are integrally formed.

[0009] Preferably, a pad is fixedly installed on the surface of the fixing plate to form a flow channel for concrete flow between adjacent fixing plates.

[0010] Preferably, the fixing plate and the pad are integrally formed.

[0011] Preferably, reinforcing rods are installed between the opposing fixing plates, and the horizontal and vertical reinforcing rods in the same plane are staggered in the longitudinal direction.

[0012] Preferably, the fixing plate and the reinforcing rod are integrally formed.

[0013] Preferably, corner plates are provided at the four corners of the bottom positioning plate, and the surface of the corner plates is provided with a third channel for concrete flow, and the two ends of the fixing plate abut against the edges of the adjacent corner plates.

[0014] Preferably, the corner plate is welded to the surface of the bottom positioning plate.

[0015] The above technical solution has the following advantages or beneficial effects: 1. The present invention provides a high-precision positioning and adjustment device for the reinforcing bars in the core area of ​​a large-span building beam-column joint. By setting a top positioning plate and a bottom positioning plate, the longitudinal reinforcing bars are precisely limited at two points above and below. The transverse reinforcing bars are horizontally clamped and positioned by the slots on the fixed plate. The spatial coordinates of all reinforcing bars are uniquely determined by the rigid mold, achieving a positioning accuracy of millimeters (within ±3mm). This ensures the shear resistance, bending resistance and confinement of the concrete in the core area of ​​the joint. During the entire process of hoisting, reinforcing bar insertion and concrete pouring and vibration, the frame can effectively resist impact and vibration, ensuring the overall strength.

[0016] 2. This invention provides a high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings. The entire device can be pre-installed on the ground, transferring the most complex and time-consuming precision work of the joint reinforcement from high altitude to ground, and from the open and disordered environment to a standardized workbench. The pre-installation can be carried out in parallel, effectively reducing the operation time in the core area. On-site, only simple lifting, reinforcement placement, and lowering and locking operations are required. The process is clear and greatly improves the overall construction efficiency. Attached Figure Description

[0017] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings, provided by the present invention.

[0019] Figure 2 This is a schematic diagram of the installation structure of the top positioning plate, bottom positioning plate, and corner plate.

[0020] Figure 3 This is a schematic diagram of the installation state of the fixing plate and the distance-extending plate.

[0021] Figure 4 This is a schematic diagram of the installation state of the bottom positioning plate, mounting rod, and corner plate.

[0022] Figure 5 This is a schematic diagram of the installation state of the fixing plate and the reinforcing rod.

[0023] Figure 6 This is a schematic diagram of the installation state of the fixing plate and the distance-extending plate.

[0024] Figure 7 This is a three-dimensional structural diagram of the top positioning plate.

[0025] In the diagram: 1. Bottom positioning plate; 2. First through groove; 3. Top positioning plate; 4. Pouring port; 5. Mounting rod; 6. Fixing plate; 7. Slot; 8. Positioning groove; 9. Snap-fit ​​part; 10. Pad; 11. Flow groove; 12. Reinforcing rod; 13. Angle plate; 14. Second through groove; 15. Mounting hole; 16. Third through groove; 17. Spacing plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1-2 As shown, the present invention provides a high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings, including a bottom positioning plate 1, a top positioning plate 3, multiple vertical mounting rods 5, and multiple detachable fixing plates 6.

[0029] The bottom positioning plate 1 is made of 20mm thick steel plate, and its planar dimensions match the cross-sectional dimensions of the core area of ​​the beam-column node. Each side of the bottom positioning plate 1 is extended outward by 50mm to provide an operating boundary. Multiple first through slots 2 are precisely opened on the plate body of the bottom positioning plate 1 by a CNC machine tool. The first through slots 2 are circular, and the reinforcing bars pass through the inside of the first through slots 2. Angle plates 13 are welded at the four corners of the bottom positioning plate 1. The angle between the two rectangular plates is 90°. The surface of the angle plate 13 is provided with a third through slot 16. The total area of ​​the third through slot 16 is not less than 30% of the area of ​​the angle plate 13.

[0030] like Figure 4 As shown, there are eight vertical mounting rods 5, with two rods corresponding to each edge of the bottom positioning plate 1. The mounting rods 5 and the bottom positioning plate 1 are integrally formed by casting, thereby ensuring the tightness of the connection between the mounting rods 5 and the bottom positioning plate 1. In order to further increase the strength of the mounting rods 5, inclined support rods (not shown in the figure) can also be welded between the mounting rods 5 and the bottom positioning plate 1 to increase the strength of the mounting rods 5.

[0031] The mounting rod 5, bottom positioning plate 1, and corner plate 13 are prefabricated in the factory to form a rigid base cage. It should be noted that the third through groove 16 is produced by cutting after being cast as a whole, which can further ensure the overall strength.

[0032] like Figures 2-3 and Figures 4-7 As shown, a sliding fixing plate 6 is installed on the surface of the mounting rod 5. The surface of the fixing plate 6 has a longitudinally opened mounting hole 15. The mounting rod 5 slides through the interior of the mounting hole 15. The fixing plate 6 can slide vertically along the mounting rod 5 without horizontal wobbling. On one long side of each fixing plate 6, a row of semi-circular slots 7 are processed by CNC punching. The number of semi-circular slots 7 is not less than the number of steel bars in each row. The diameter of the slots 7 matches the diameter of the transverse steel bars to be installed.

[0033] To adjust the spacing between adjacent reinforcing bars, spacer plates 17 are installed between adjacent fixed plates 6. Different numbers of spacer plates 17 are installed according to different reinforcing bar spacings. The spacer plates 17 are slidably installed on the surface of the mounting rod 5. Symmetrical pads 10 are fixed on the surface of the fixed plates 6. When the fixed plates 6 are stacked, the pads 10 form a stable and uniform flow channel 11 between adjacent plates, serving as a concrete channel. The pads 10 are integrally formed with the fixed plates 6. Reinforcing rods 12 are also welded between two opposite fixed plates 6 to form a horizontal truss to enhance the overall strength. To ensure concrete flow, the horizontal and vertical reinforcing rods 12 in the same plane are staggered in height.

[0034] The structure of the top positioning plate 3 is similar to that of the bottom positioning plate 1. A second through groove 14 is opened in the central area to position the longitudinal reinforcing bars. At least one pouring port 4 is opened at a corner of the top positioning plate 3, usually four ports are opened for the four corners to facilitate the vibration of concrete. It can also be equipped with a conical guide tube (not shown in the figure). The concrete enters from the pouring port 4. The lower surface of the top positioning plate 3 is provided with a positioning groove 8 corresponding to the position of the installation rod 5. The top of the installation rod 5 is provided with a wedge-shaped or boss-shaped snap-fit ​​part 9 to realize the quick alignment and installation of the top positioning plate 3 and the installation rod 5.

[0035] During construction, pre-assembly on the ground is required: First, place the already welded mounting rod 5 and the bottom positioning plate 1 of the corner plate 13 horizontally. According to the construction drawings, select the corresponding number of fixing plates 6 and spacer plates 17. The construction drawings are obtained by professionals in this field after multiple tests. According to the designed elevation sequence, insert the fixing plates 6 and spacer plates 17 into the corresponding mounting rods 5 through the mounting holes 15 in sequence, and weld the reinforcing rods 12 between the corresponding fixing plates 6.

[0036] Next, the entire frame is hoisted to the required position: using a tower crane, the entire positioning frame is smoothly hoisted to the top of the completed column using a special lifting device connected to the top of the installation rod 5. Then, the frame is slowly lowered, guided by ground personnel, so that all the longitudinal steel bars extending from the column pass through the first through slot 2 on the bottom positioning plate 1 accurately. After the entire frame is in place, its design elevation and level are precisely adjusted using adjustable supports or pre-installed adjusting bolts at the bottom.

[0037] Next, install the horizontal reinforcement in layers and steps: Workers determine the elevation level where the horizontal reinforcement needs to be installed, and use simple lifting tools, such as small jacks or special wrenches, to simultaneously lift the fixing plate 6 to a certain height, approximately 100-150mm, to create sufficient operating space. Then, the prefabricated stirrups or horizontal bars are horizontally inserted from the side, and the bars at both ends are accurately placed in the corresponding slots 7 of the two raised, opposite fixing plates 6. Then, the fixing plate 6 is slowly lowered, and the slots 7 follow suit, locking the horizontal reinforcement in place. The weight of the fixing plate 6 and the enclosing effect of the slots 7 effectively prevent the reinforcement from moving. Repeat the "lift-place reinforcement-lower and lock" process to complete the installation of all layers of horizontal reinforcement from top to bottom.

[0038] Then install the top positioning plate 3 for sealing and re-verification: hoist the top positioning plate 3, align its positioning groove 8 with the snap-fit ​​part 9 at the top of the installation rod 5 and insert it. Then adjust the top of all longitudinal steel bars so that the steel bars pass through the second through groove 14 of the top positioning plate 3 to achieve full-length positioning of the longitudinal steel bars in three-dimensional space. Use measuring instruments to finally verify the position of the key steel bars.

[0039] Finally, concrete pouring and vibration are carried out: the mold is assembled on the outside of the whole, and concrete is poured from the pouring port 4 of the top positioning plate 3. The concrete flows under the action of gravity and can smoothly fill the entire complex node area and the interior of the mold through the flow channel 11 between the fixed plates 6, the through channel on each plate and the space formed by the staggered reinforcement rods 12. The vibrator is inserted into the core area through the pouring port 4 and the flow channel 11 to effectively vibrate and ensure that the concrete in the core area of ​​the node is dense and without defects.

[0040] It should be noted that although the top positioning plate 3, bottom positioning plate 1, and mounting rod 5 are added in the solution of this invention, they are all conventional and ordinary mechanical structures without any high-cost precision parts. Therefore, the cost of adding the above structures is low. The rigid frame and the slot 7 can control the position error of the reinforcing bars to the millimeter level, ensuring the actual stress of the structure. Pre-assembly on the ground and overall hoisting can significantly reduce the amount and time of high-altitude work. In comparison, the cost of adding the above structures is negligible. The above technical solution of this invention is a specific improvement based entirely on the above-mentioned existing technology and to solve the technical problems.

[0041] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings, characterized in that: include The bottom positioning plate has a first through groove for the longitudinal reinforcing bars to pass through. The top positioning plate has at least one pouring port on its body, the pouring port is located at the corner of the top positioning plate, and the surface of the top positioning plate has a second through groove corresponding to the first through groove. Multiple vertical mounting rods, with their ends connected to the bottom positioning plate and the top positioning plate respectively, form a spatial frame; Multiple detachable fixing plates, each fixing plate having mounting holes on its surface, the fixing plates being slidably mounted on the surface of the mounting rod, and the edges of the fixing plates having slots, with transverse reinforcing bars being secured in the corresponding slots of two adjacent fixing plates; A spacer plate is installed between adjacent fixed plates, and the spacer plate is slidably mounted on the surface of the mounting rod; First, slide multiple fixing plates and spacer plates onto the surface of the mounting rod on the ground. Then, hoist the whole unit to the required position so that the longitudinal steel bars pass through the first through slot of the bottom positioning plate. Next, lift the fixing plates at different positions and pass the transverse steel bars through the slots of the fixing plates. Install the top positioning plate and finally pour concrete.

2. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 1, characterized in that: The lower surface of the top positioning plate is provided with a positioning groove, and the top end of the mounting rod is provided with a snap-fit ​​part that is adapted to the positioning groove. The snap-fit ​​part is inserted into the interior of the positioning groove.

3. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 1, characterized in that: The mounting rod and the bottom positioning plate are integrally formed.

4. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 1, characterized in that: The surface of the fixing plate is fixedly equipped with pads to form a flow channel for concrete flow between adjacent fixing plates.

5. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 4, characterized in that: The fixing plate and the pad are integrally formed.

6. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 1, characterized in that: Reinforcing rods are installed between the opposing fixing plates, and the horizontal and vertical reinforcing rods in the same plane are staggered in the longitudinal direction.

7. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 6, characterized in that: The fixing plate and the reinforcing rod are integrally formed.

8. The high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 1, characterized in that: The bottom positioning plate has corner plates at its four corners, and the surface of the corner plates has a third channel for concrete flow. The two ends of the fixing plate abut against the edges of the adjacent corner plates.

9. A high-precision positioning and adjustment device for the core area of ​​beam-column joints in large-span buildings according to claim 8, characterized in that: The corner plate is welded to the surface of the bottom positioning plate.

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