Method for Determining and Correcting the Position of Reinforcing Bars Based on Precast Column Sleeve Connections

Abstract

This invention discloses a method for judging and correcting the position of reinforcing bars based on precast column sleeve connections. It includes multiple simulated sleeves and mating rubber plugs. The number of simulated sleeves matches the number of grouting sleeves inside the precast column. Each simulated sleeve has a parallel light source at its top, and its outer wall is opaque. Multiple simulated sleeves are mounted on a support, and can be adjusted and fixed along their diameter. The mating rubber plug includes a limiting plate and frustums on two surfaces of the limiting plate. The method involves first matching the grouting sleeve positions, then pre-setting a grouting simulation layer, followed by reinforcing bar alignment, and then reinforcing bar correction based on the alignment results. Finally, a physical simulation is performed to further improve the accuracy of the correction. This invention enables accurate simulated assembly, is intuitive and reliable, highly efficient, and cost-effective.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building construction technology, specifically to a method for judging and correcting the position of reinforcing bars based on prefabricated column sleeve connections. Background Technology

[0002] Precast columns are components that are prefabricated in a factory and then hoisted and connected on the construction site. During the assembly process, the precast column is connected to the reinforcing steel bars of the corresponding lower precast column that have been connected and cured and protrude from the ground through a grouting sleeve set at the bottom, and high-strength grout is injected to achieve the connection.

[0003] Engineering practice shows that the assembly of precast columns is currently extremely difficult and dangerous, primarily due to the alignment and connection of the sleeves with the reinforcing bars. In this process, the precast column is vertically hoisted and slowly lowered. Just as the bottom of the column is about to contact the protruding reinforcing bars, the column is straightened, and through manual observation, all sleeves are aligned with their corresponding protruding reinforcing bars. Then, the column is slowly lowered until all the sleeves at the bottom of the column are fitted onto the corresponding protruding reinforcing bars, completing the assembly connection. However, due to positional deviations between the reinforcing bars and sleeves, this assembly is rarely so smooth. Workers typically need to adjust the position of the reinforcing bars during the assembly process. When assembly fails, it is crucial to quickly determine which reinforcing bars to adjust and how. Furthermore, after adjustment, other reinforcing bars often become unsuitable for assembly, leading to confusion and disarray. Moreover, adjusting the position of reinforcing bars near the bottom of the hoisted precast column is extremely dangerous; the longer this process takes, the greater the risk.

[0004] The deviation in the position of the sleeve and the reinforcing bar is mainly caused by the following reasons: Firstly, there are inherent reasons. Even if the position of the sleeve and the reinforcing bar is correctly set during the prefabrication process in the factory, the position may still shift due to concrete pouring and vibration, resulting in a certain degree of manufacturing error and making it impossible to guarantee complete consistency with the design drawings. Secondly, there are acquired reasons. After the precast column is manufactured, during the hoisting, transfer, and stacking of the finished product, after the precast column is assembled, the protruding reinforcing bars pass through the floor slab, during the floor slab pouring and concrete vibration processes, and due to inadequate protection of the protruding reinforcing bars, all of these factors can easily cause the reinforcing bars to be subjected to impacts and bending, thus making it impossible for the reinforcing bars and the sleeve to match.

[0005] To address the mismatch between the sleeve and rebar positions during precast column hoisting, two main methods are currently employed: 1. On-site adjustment by installation workers. This involves measuring the relative positions of the sleeve and rebar using a measuring tape, relying on experience to quickly determine the appropriate adjustment plan. The disadvantage is the susceptibility to errors, requiring repeated trial and error, resulting in significant time consumption and worker exposure to hazards. 2. Pre-measurement, using coordinate systems to pinpoint rebar deviations, and adjusting the rebar before installation. The advantage of this method is the acquisition of distance information between the sleeve and rebar through measurement, followed by computer-generated two-dimensional coordinates to simulate the assembly of the sleeve and rebar, thus obtaining the optimal rebar adjustment plan. Furthermore, adjusting before installation reduces safety risks. However, the disadvantages are also obvious: the basic data is still obtained through manual measurement. Since the sleeve and rebar have circular cross-sections and their centers are difficult to locate, data errors are significant, resulting in poor simulation performance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method for judging and correcting the position of reinforcing bars based on precast column sleeve connection, which can accurately simulate assembly, is intuitive and reliable, efficient and cost-controllable.

[0007] To address the aforementioned technical problems, this invention provides a method for determining and correcting the position of reinforcing bars based on precast column sleeve connections. The method includes multiple simulated sleeves and butt-joint rubber plugs. The number of simulated sleeves corresponds to the number of grouting sleeves inside the precast column. Each simulated sleeve has a parallel light source at its top, and its outer wall is opaque. Multiple simulated sleeves are mounted on a support, and each sleeve can be adjusted and fixed along its diameter. The butt-joint rubber plug includes a limiting plate and a frustum disposed on two surfaces of the limiting plate. The method includes the following steps:

[0008] Step 1) Matching position: Insert the frustum of one surface of the mating rubber plug into the grouting sleeve of the precast column. Then, align multiple simulated sleeves one by one with the corresponding mating rubber plugs and press them onto the frustum of the other surface of the mating rubber plugs. Press the mating rubber plugs tightly between the grouting sleeves and the simulated sleeves. Then, fix the simulated sleeves on the bracket and remove them from the bottom of the precast column for later use.

[0009] Step 2) Pre-set grouting simulation layer: Set grouting pads at the base of the reinforcing bars at the installation position of the precast column to mark the assembly position height of the bottom of the grouting sleeve during the actual assembly process;

[0010] Step 3) Rebar alignment: Place the bracket at the assembly position, adjust the level, and ensure that each simulated sleeve is above the corresponding rebar. Then turn on the parallel light source so that parallel light rays shine from inside the simulated sleeve onto the grout pad and form a light spot on the grout pad. The junction of the rebar on the surface of the grout pad is defined as the first identification position, and the projection of the rebar on the surface of the grout pad after being illuminated by the parallel light source is defined as the second identification position.

[0011] Coarsely adjust the position of the support frame by moving the support frame to adjust the position of the light spot on the pad block;

[0012] After adjustment, if each first identification position cannot be located inside the corresponding light spot, it is directly determined that the grouting sleeve and the steel bar are mismatched and the precast column cannot be installed.

[0013] After adjustment, when each first identification position is located inside the corresponding light spot, it is determined whether the second identification position is located inside the corresponding light spot. If the determination is yes, it is directly determined that the grouting sleeve and the rebar are matched and the requirements for installing precast columns are met. If the determination is no, the position of the bracket is finely adjusted, and each light spot is moved to simultaneously wrap the first and second identification positions. If simultaneous wrapping is achieved, it is directly determined that the grouting sleeve and the rebar are matched and the requirements for installing precast columns are met. If simultaneous wrapping is not achieved, proceed to the next step.

[0014] Step 4) Rebar straightening: Locate the light spot that cannot simultaneously cover the first and second recognition positions, and according to the tilt direction of the second recognition position, perform reverse bending correction on the rebar corresponding to the second recognition position until the light spot simultaneously covers the first and second recognition positions.

[0015] Step 5) Entity simulation: After the correction is completed, multiple simulated sleeves are simultaneously moved vertically downwards to fit the reinforcing bars to verify the correction and alignment of the reinforcing bars. If the verification fails, proceed to step 3). If the verification is successful, the precast column can be hoisted and assembled.

[0016] Furthermore, the bracket includes an outer frame and an inner frame. The inner frame is disposed inside the outer frame and connected by a lifting assembly disposed along the Z-axis. At least three crossbeams that move along the X-axis are disposed inside the inner frame. Mounting seats that move along the Y-axis are disposed on the crossbeams. The simulated sleeve is disposed on the mounting seats.

[0017] Furthermore, a U-shaped pad is provided at the bottom of the outer frame, and four adjustable feet are evenly distributed on the U-shaped pad. The outer frame is placed on the surface of the U-shaped pad.

[0018] Furthermore, each end of the crossbeam is provided with a sliding block, the bottom of the sliding block is provided with a limiting boss, the limiting boss is provided with an arc-shaped limiting part, the surface of the crossbar of the inner frame corresponding to the sliding block is provided with a limiting groove, the limiting boss is provided in the limiting groove, and the inner wall of the limiting groove corresponding to the arc-shaped limiting part is provided with an arc-shaped guide protrusion.

[0019] Furthermore, the crossbeam is provided with a horizontal sliding groove and a longitudinal sliding groove that pass through the two surfaces. The mounting base includes an L-shaped support plate. The transverse section of the L-shaped support plate extends into the horizontal sliding groove. A bolt and a nut are provided between the L-shaped support plate and the crossbeam. The bolt passes through the longitudinal sliding groove and the L-shaped support plate and is fastened to the nut. An anti-rotation protrusion is provided on the surface of the crossbeam corresponding to the nut.

[0020] Furthermore, the crossbeam has two layers, with the same number of crossbeams in each layer. The crossbeams in the first layer are used to connect with the simulated sleeve, and the crossbeams in the second layer are used to connect with the sleeve, which is fitted onto the outer surface of the simulated sleeve.

[0021] Furthermore, the simulated sleeve includes a threaded base and a rotating sleeve, the inner diameter of which is consistent with the inner diameter of the grouting sleeve of the precast column to be installed.

[0022] Furthermore, during the physical simulation, the simulated sleeve moves toward the rebar until it contacts the grout pad. If there is interference during the movement, check whether the equipment level is properly adjusted and repeat step 3). If there is no interference, the verification is successful.

[0023] The beneficial effects of this invention are:

[0024] 1. The simulated sleeve is set up by simulating the position of the grouting sleeve to avoid the problem of low measurement accuracy of the measuring tool and ensure the accuracy of the simulated position during the correction process.

[0025] 2. The light spot emitted by the parallel light source has the effect of keeping its size constant within a certain distance, thus simulating the assembly path of the grouting sleeve from top to bottom. Furthermore, the diameter of the light spot is consistent with the inner diameter of the grouting sleeve. When the reinforcing bar is located within the light spot path, it can be determined that the sleeve installation requirements are met. Therefore, based on the coordination between the light spot and the projection of the reinforcing bar, it is possible to quickly determine whether the assembly requirements are met and whether the reinforcing bar adjustment is necessary.

[0026] 3. Based on the angle of the projection, the direction of rebar straightening can be quickly determined, greatly reducing the difficulty of straightening. Furthermore, the projection remains throughout the straightening process, allowing for real-time observation of the straightening progress and improving straightening efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the corrective device structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the mating rubber plug structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure when the matching position is met according to the present invention;

[0030] Figure 4 This is a schematic diagram showing the combination of the reinforcing bar and the light spot when the reinforcing bar is vertical in this invention;

[0031] Figure 5 This is a schematic diagram of the combination of the reinforcing bar and the light spot when the requirements are met;

[0032] Figure 6 This is a schematic diagram of the combination of the reinforcing bar and the light spot when the reinforcing bar is tilted and does not meet the requirements of the present invention;

[0033] Figure 7 This is a schematic diagram of the inner frame of the double-layer structure used in this invention;

[0034] Figure 8 This is a schematic diagram showing the connection between the inner frame, crossbeam, and mounting base of the present invention.

[0035] Figure 9 This is a schematic diagram of the bottom structure of the crossbeam of the present invention. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0037] Reference Figures 1 to 6 As shown, an embodiment of the method for judging and correcting the position of reinforcing bars based on the precast column sleeve connection of the present invention requires the use of a simulation device for correction. The simulation device includes multiple simulation sleeves 1 and a docking rubber plug. The number of simulation sleeves is consistent with the number of grouting sleeves inside the precast column. Each simulation sleeve is provided with a parallel light source 3 at its top. The parallel light source can emit parallel light spots. During the entire correction process, the light spots will not change due to changes in the irradiation distance, which satisfies the purpose of fixed-size judgment and observation. The inner diameter of the simulation sleeve is consistent with the inner diameter of the corresponding grouting sleeve, so the diameter of the light spot is the inner diameter of the grouting sleeve. The outer wall of the simulation sleeve is an opaque structure to avoid external interference. Multiple simulation sleeves are installed on a bracket 4. The simulation sleeves can be moved, adjusted and fixed along the diameter direction to achieve self-adaptation. The docking rubber plug includes a limiting plate 5 and a frustum 6 set on two surfaces of the limiting plate. The frustum can dock the simulation sleeve and the grouting sleeve on the same axis to accurately simulate the orientation of the grouting sleeve at the bottom of the precast column.

[0038] In the above structure, the support includes an outer frame 7 and an inner frame 8. The inner frame is set inside the outer frame and connected by a lifting component 9 set along the Z-axis. The lifting component can be a guide column and guide sleeve matching structure, or a dovetail structure, etc., which can meet the usage requirements. At least three crossbeams 10 that move along the X-axis are set inside the inner frame, which are determined according to the number of rows of grouting sleeves. Mounting seats that move along the Y-circumference are set on the crossbeams. The number of mounting seats is determined according to the number of grouting sleeves corresponding to each crossbeam. Simulated sleeves are set on the mounting seats to form a structure that meets the correction requirements.

[0039] The installation process using the aforementioned simulation device includes the following steps:

[0040] First, position matching is performed. The immovable grouting sleeve inside the precast column is replicated using a simulated sleeve. Specifically, the frustum of one surface of the mating rubber plug is inserted into the grouting sleeve 15 of the precast column 14. Then, holding the bracket, the multiple simulated sleeves on the bracket are aligned one by one with the corresponding mating rubber plugs. By pressing the bracket, the simulated sleeves are fitted onto the frustum of the other surface of the mating rubber plug. After the two ends of the mating rubber plug are deformed and squeezed together, the corresponding grouting sleeves and simulated sleeves can be effectively connected on the coaxial line. Then, the simulated sleeves are fixed on the bracket. The relative positions of the multiple simulated sleeves are the relative positions of the multiple grouting sleeves. This is a direct "printing" method. Then, the bracket can be removed from the bottom of the precast column for later use.

[0041] Next, a grouting simulation layer is preset to simulate the relative position between the bottom of the grouting sleeve and the reinforcing bar when the grouting sleeve is installed in place during the actual assembly process. Specifically, a grouting pad 13 is set at the root of the reinforcing bar 12 at the installation position of the precast column. The grouting pad can be a rubber block with a hole in the middle, which is directly fitted onto the reinforcing bar. The elevation is measured using a level, which marks the assembly position height of the bottom of the grouting sleeve during the actual assembly process.

[0042] Subsequently, the steel reinforcement is checked to match and simulate the steel reinforcement before the precast column is hoisted, so as to determine whether the hoisting can be carried out. Specifically, the bracket is placed at the assembly position and adjusted to be level, so that each simulated sleeve is located above the corresponding steel reinforcement. Then, the parallel light source is turned on so that the parallel light rays are shone from the simulated sleeve to the grout pad block and form a light spot 16 on the grout pad block. The junction of the steel reinforcement on the surface of the grout pad block is defined as the first identification position. This position is used to determine the relationship between the lowest position of the steel reinforcement and the inner wall of the grouting sleeve. The projection of the steel reinforcement on the surface of the grout pad block after being irradiated by the parallel light source is defined as the second identification position. This position is used to determine the relationship between the highest position of the steel reinforcement and the inner wall of the grouting sleeve.

[0043] According to the above definition, the position of the support is first coarsely adjusted. The support is moved to adjust the light spot so that all the light spots fall on the corresponding grout pads. The light spots are then moved to make each first identification position inside the corresponding light spot. When each first identification position cannot be inside the corresponding light spot, it is directly determined that the grouting sleeve and the rebar position do not match. That is, the prefabricated position of the grouting sleeve and the position of the rebar cannot be connected. It is equivalent to the rebar position or the grouting sleeve position having inherent deficiencies, and the prefabricated column cannot be installed.

[0044] After adjustment, when each first identification position is located inside the corresponding light spot, it is necessary to determine whether the second identification position is located inside the corresponding light spot. If the determination is yes, then it is directly determined that the grouting sleeve and the rebar are matched, meeting the requirements for installing precast columns. Figure 4 As shown, the verticality of the reinforcing bar is good, the first identification position is at the center of the light spot, and the second identification position is also at the center of the light spot. The reinforcing bar has basically no bending. If the judgment is negative, the position of the support is finely adjusted, attempting to move each light spot to simultaneously wrap the first and second identification positions. If simultaneous wrapping is achieved, it is directly determined that the grouting sleeve and the reinforcing bar are matched, meeting the requirements for installing precast columns. Figure 5 As shown, although the second identification position extends beyond the outer periphery of the light spot during judgment, through fine-tuning, the second identification position of the rebar can achieve the wrapping effect while satisfying the wrapping of other rebars, thus meeting the requirements. The rebar has a small bend, but it does not affect the assembly. If it cannot be wrapped simultaneously, the rebar bends more, affecting the assembly, and rebar correction is required. During the fine-tuning process, it is necessary to follow the principle of wrapping the first and second identification positions simultaneously with as many light spots as possible, and to correct the rebars corresponding to the few light spots that cannot wrap the first and second identification positions as much as possible. First, find the light spots that cannot wrap the first and second identification positions simultaneously, and then, according to the tilt direction of the second identification position, perform reverse bending correction on the rebar corresponding to the second identification position until the light spot wraps the first and second identification positions simultaneously. Since the correction is performed under parallel light source illumination, the recognition effect is good, and each correction can be judged to be in place.

[0045] After the above-mentioned light correction, a physical simulation can be performed. Multiple simulated sleeves are simultaneously moved vertically downwards towards the rebar to verify the alignment and correction of the rebar. The simulated sleeves move towards the rebar until they contact the grout pad. If there is interference during the movement, check whether the equipment level is properly adjusted and repeat the correction steps to avoid the problem of the light spot affecting the alignment accuracy due to inaccurate level. If there is no interference, the verification is passed. Once the verification is passed, the precast column can be hoisted and assembled.

[0046] The outer frame is equipped with a U-shaped pad at the bottom, and four adjustable feet are evenly distributed on the U-shaped pad. The outer frame is placed on the surface of the U-shaped pad, which improves the convenience of level adjustment. The outer frame can be moved on a horizontal plane and can remain horizontal after being moved.

[0047] And refer to Figures 7 to 9 As shown, the crossbeam has two layers, with the same number of crossbeams in each layer. The crossbeams in the first layer are used to connect with the simulated sleeve, and the crossbeams in the second layer are connected with the sleeve 25. The sleeve is fitted onto the outer surface of the simulated sleeve. In the two-layer structure, the inner frame also forms a three-dimensional structure, which is more robust and will not shake, causing distortion. The position of the simulated sleeve is also more accurate. The first layer is a fixed connection, and the second layer is a straightening sleeve.

[0048] To adapt to the use of precast columns of different sizes, sliding blocks 20 are provided at both ends of the crossbeam. The bottom of the sliding block is provided with a limiting boss, and the limiting boss is provided with an arc-shaped limiting part. The surface of the crossbar of the inner frame corresponding to the sliding block is provided with a limiting groove. The limiting boss is set in the limiting groove, and the inner wall of the limiting groove corresponding to the arc-shaped limiting part is provided with an arc-shaped guide protrusion. The structure is simple, the limiting boss can slide smoothly in the limiting groove, and the sliding block is also provided with a locking screw for easy fixation after moving into place.

[0049] In actual use, it was found that although the grouting sleeves are prefabricated in the factory and have high positional accuracy, there will be relative deviations in the positions of different grouting sleeves. If each simulated sleeve can only move along the Y-axis on the crossbeam, it cannot meet the purpose of free adjustment of multiple simulated sleeves on a crossbeam. Therefore, a horizontal sliding groove 21 and a longitudinal sliding groove 22 that penetrate two surfaces are opened on two adjacent crossbeams. The mounting base includes an L-shaped support plate 23. The transverse section of the L-shaped support plate extends into the horizontal sliding groove. Bolts 24 and nuts are set between the L-shaped support plate and the crossbeam. The bolts pass through the longitudinal sliding groove and the L-shaped support plate and are fastened to the nuts. At the same time as fastening, the walls on both sides of the horizontal sliding groove are clamped, and finally the L-shaped support plate is clamped and fixed firmly. The surface of the crossbeam corresponding to the nut is provided with an anti-rotation protrusion. The anti-rotation protrusion is a long strip of protrusion that fits against one surface of the nut to prevent the nut from rotating.

[0050] During operation, the crossbeam first moves multiple simulated sleeves to a position approximately close to the grouting sleeve. Then, the crossbeam is locked, and the simulated sleeves are directly aligned with the mating rubber plugs for insertion. During the insertion process, the L-shaped support plate moves freely in the horizontal sliding groove, and its extension length and movement position are not restricted by the crossbeam. After the insertion is completed, it can be locked with bolts, thereby improving the accuracy of determining the position of the simulated sleeves.

[0051] In one embodiment, in order to better meet the practical needs of different grouting sleeves, the simulated sleeve is designed as a replaceable structure. Specifically, the simulated sleeve includes a threaded base and a rotating sleeve. The inner diameter of the rotating sleeve is consistent with the inner diameter of the grouting sleeve of the precast column to be installed. The replacement operation is simple and the applicability is strong.

[0052] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A method for determining and correcting the position of reinforcing bars based on precast column sleeve connections, characterized in that, The system includes multiple simulated sleeves and mating rubber plugs. The number of simulated sleeves matches the number of grouting sleeves inside the precast column. Each simulated sleeve has a parallel light source at its top, and its outer wall is opaque. Multiple simulated sleeves are mounted on a support, and each sleeve can be adjusted and fixed along its diameter. The mating rubber plug includes a limiting plate and frustums on two surfaces of the limiting plate. The system includes the following steps: Step 1) Matching position: Insert the frustum of one surface of the mating rubber plug into the grouting sleeve of the precast column. Then, align multiple simulated sleeves one by one with the corresponding mating rubber plugs and press them onto the frustum of the other surface of the mating rubber plugs. Press the mating rubber plugs tightly between the grouting sleeves and the simulated sleeves. Then, fix the simulated sleeves on the bracket and remove them from the bottom of the precast column for later use. Step 2) Pre-set grouting simulation layer: Set grouting pads at the base of the reinforcing bars at the installation position of the precast column to mark the assembly position height of the bottom of the grouting sleeve during the actual assembly process; Step 3) Rebar alignment: Place the bracket at the assembly position, adjust the level, and ensure that each simulated sleeve is above the corresponding rebar. Then turn on the parallel light source so that parallel light rays shine from inside the simulated sleeve onto the grout pad and form a light spot on the grout pad. The junction of the rebar on the surface of the grout pad is defined as the first identification position, and the projection of the rebar on the surface of the grout pad after being illuminated by the parallel light source is defined as the second identification position. Coarsely adjust the position of the support, and adjust the position of the light spot on the pad by moving the support; After adjustment, if each first identification position cannot be located inside the corresponding light spot, it is directly determined that the grouting sleeve and the steel bar are mismatched and the precast column cannot be installed. After adjustment, when each first identification position is located inside the corresponding light spot, it is determined whether the second identification position is located inside the corresponding light spot. If the determination is yes, it is directly determined that the grouting sleeve and the rebar are matched, meeting the requirements for installing precast columns, and proceeding to the next step; if the determination is no, the bracket position is finely adjusted, attempting to move each light spot to simultaneously wrap the first and second identification positions. If simultaneous wrapping is achieved, it is directly determined that the grouting sleeve and the rebar are matched, meeting the requirements for installing precast columns; if not, simultaneous wrapping is achieved, and proceeding to the next step. Step 4) Rebar straightening: Locate the light spot that cannot simultaneously cover the first and second recognition positions, and according to the tilt direction of the second recognition position, perform reverse bending correction on the rebar corresponding to the second recognition position until the light spot simultaneously covers the first and second recognition positions. Step 5) Entity simulation: After the correction is completed, multiple simulated sleeves are simultaneously moved vertically downwards to fit the reinforcing bars to verify the correction and alignment of the reinforcing bars. If the verification fails, proceed to step 3). If the verification passes, the precast column is hoisted and assembled.

2. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 1, characterized in that, The support includes an outer frame and an inner frame. The inner frame is disposed inside the outer frame and connected by a lifting assembly arranged along the Z-axis. At least three crossbeams that move along the X-axis are disposed inside the inner frame. Mounting seats that move along the Y-axis are disposed on the crossbeams. The simulated sleeve is disposed on the mounting seats.

3. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 2, characterized in that, The bottom of the outer frame is provided with a U-shaped pad, and four adjustable feet are evenly distributed on the U-shaped pad. The outer frame is placed on the surface of the U-shaped pad.

4. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 2, characterized in that, Both ends of the crossbeam are provided with sliding blocks, the bottom of the sliding block is provided with a limiting boss, the limiting boss is provided with an arc-shaped limiting part, the surface of the crossbar of the inner frame corresponding to the sliding block is provided with a limiting groove, the limiting boss is provided in the limiting groove, and the inner wall of the limiting groove corresponding to the arc-shaped limiting part is provided with an arc-shaped guide protrusion.

5. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 2, characterized in that, The crossbeam has a horizontal sliding groove and a longitudinal sliding groove that pass through two surfaces. The mounting base includes an L-shaped support plate. The transverse section of the L-shaped support plate extends into the horizontal sliding groove. A bolt and a nut are provided between the L-shaped support plate and the crossbeam. The bolt passes through the longitudinal sliding groove and the L-shaped support plate and is fastened to the nut. The surface of the crossbeam corresponding to the nut is provided with an anti-rotation protrusion.

6. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 5, characterized in that, The crossbeam has two layers, with the same number of crossbeams in each layer. The crossbeams in the first layer are used to connect with the simulated sleeve, and the crossbeams in the second layer are used to connect with the sleeve. The sleeve is fitted onto the outer surface of the simulated sleeve.

7. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 1, characterized in that, The simulated sleeve includes a threaded base and a rotating sleeve, the inner diameter of which is consistent with the inner diameter of the grouting sleeve of the precast column to be installed.

8. The method for determining and correcting the position of reinforcing bars based on precast column sleeve connections as described in claim 1, characterized in that, During the physical simulation, the simulated sleeve moves toward the rebar until it contacts the grout pad. If there is interference during the movement, check if the equipment level is properly adjusted and repeat step 3). If there is no interference, the verification is successful.

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