Device and method for detecting positioning error of upper-layer transverse steel bars of box girder bottom plate
Through the combined design of positioning beams and error detection clamps, the problem of low efficiency and low accuracy of positioning error detection of transverse steel bars on the upper layer of the box beam bottom plate is solved, and efficient and accurate steel bar positioning error detection is achieved to meet the detection needs of different steel bar diameters.
Patent Information
- Application Number
- CN202510518416.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-22
AI Technical Summary
In the prior art, the positioning error detection efficiency of the upper layer of the box girder bottom plate has low efficiency and low accuracy, especially when using calipers to measure, it is easy to cause error accumulation and inaccurate measurement.
The device including positioning beams, error detection clamps and positioning frames is adopted. Through the error detection clamps connected to the scale lines on the positioning beams and springs, combined with the design of V-shaped clamp slots and threaded columns, the rapid positioning and error detection of transverse steel bars is achieved, and the use of an annular bundled rubber belt and level is used to ensure detection accuracy and efficiency.
It improves the detection efficiency and accuracy of transverse steel bars, adapts to different steel bar diameters, is simple to operate, low cost, wide application range, can quickly read error data, and achieve efficient positioning error detection.
Smart Images
Figure CN120351832A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of positioning equipment for the upper layer of the box girder bottom plate, and relates to a positioning error detection device for the upper layer of transverse reinforcement bars of the box girder bottom plate, and also relates to an operation method of the positioning error detection device for the upper layer of transverse reinforcement bars of the box girder bottom plate. Background Art
[0002] As an important component for supporting high-speed railways, a steel cage needs to be fabricated before pouring the box girder of high-speed railways. The steel cage is prepared by binding different steel bars. The bottom plate of the box girder steel cage includes upper and lower layers of steel bars. During the binding process, the steel bars in the lower layer of the box girder bottom plate are positioned in the positioning card slots of the box girder steel bar binding jig. However, for the longitudinal position positioning of the upper layer of transverse reinforcement bars of the box girder bottom plate, it is usually measured by a caliper and then bound. After binding, quality inspectors need to conduct quality inspection. When the quality inspectors measure the spacing of the transverse reinforcement bars, they also use a caliper for measurement. First, the header bar is used as a reference for measurement. If each bar is measured relative to the reference steel bar, it will cause the tape measure to be limited in length and unable to measure. However, when the middle steel bar is used as a reference for measurement, it will lead to error accumulation and exceed the error range, resulting in inaccurate measurement. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a positioning error detection device and method for the upper layer of transverse reinforcement bars of the box girder bottom plate, which can quickly realize the error detection of the upper layer of transverse reinforcement bars of the bottom plate and improve the detection efficiency and detection accuracy of the transverse reinforcement bars.
[0004] The technical solution adopted by the present invention is as follows: A positioning error detection device for the upper layer of transverse reinforcement bars of the box girder bottom plate includes a strip-shaped positioning beam, an error detection fixture, and a positioning frame. One end of the positioning beam is fixedly connected with a positioning frame, and the positioning frame is used for detachably fixedly connecting to the positioning reference steel bar. A plurality of error detection fixtures are movably sleeved on the positioning beam. Springs are symmetrically connected to both sides of each error detection fixture, and the other ends of the springs are fixedly connected to a connecting column, and the connecting column is fixedly connected to the positioning beam. A plurality of error detection fixtures can be inserted into multiple longitudinally arranged transverse reinforcement bars to be detected, and scale lines are provided on the positioning beam.
[0005] Further, the above error detection fixture includes a movable sleeve and an inverted V-shaped card slot. The movable sleeve adopts a square sleeve structure and is movably sleeved on the positioning beam with a square cross-section. The upper end of the V-shaped card slot is fixedly connected to the middle of the bottom side of the movable sleeve, and the width direction of the slot part of the V-shaped card slot is arranged along the length direction of the positioning beam.
[0006] Further, a threaded column is provided at the upper end of the above V-shaped card slot, and the threaded column is screwed into the center of the bottom of the movable sleeve and locked with a nut.
[0007] Further, a spirit level is provided in the middle of the top of the above positioning beam.
[0008] Furthermore, a strip-shaped groove is provided along the length direction in the middle of the side surface of the positioning beam. Uniformly spaced positioning holes are provided in the strip-shaped groove. The connecting column is a stepped column, and its small end can be inserted into the positioning holes. Spring connecting plates are provided in the middle of both sides of the movable sleeve. The spring connecting plates are embedded in the strip-shaped groove. After the spring connects the spring connecting plate and the connecting column, it is parallel to the positioning beam. Fine scale lines are provided on the lower side of the strip-shaped groove.
[0009] Furthermore, the above-mentioned positioning frame includes fixed clamps, connecting rods, pushing rods, connecting pipes and stretching rods. The connecting pipe is fixedly connected to one end of the positioning beam. The fixed clamps are in a lying V-shaped structure and there are two of them. The upper ends are symmetrically hinged at the U-shaped notches on both sides of the lower end of the connecting pipe, and the groove parts of the two fixed clamps are arranged oppositely to form a positioning steel bar clamping part. Two bent and extended pushing arms integrally formed with the upper ends of the two fixed clamps are provided. The upper ends of the two pushing arms are respectively hinged to one ends of the two connecting rods. The other ends of the two connecting rods are symmetrically hinged to both ends of the horizontal pushing rod. The pushing rod horizontally and movably passes through a vertical strip-shaped through hole provided on the connecting pipe. A tension spring abuts against the middle part of the bottom side of the pushing rod. The tension spring is located inside the connecting pipe and its lower end abuts against the spring fixing plate. The spring fixing plate is fixedly connected inside the connecting pipe and is located above the U-shaped notch. The lower end of the stretching rod is fixedly connected to the middle part of the pushing rod and is built into the connecting pipe. The upper end of the stretching rod movably passes through the guiding sleeve. The guiding sleeve is fixedly connected to the upper end of the connecting pipe.
[0010] Furthermore, the above-mentioned connecting pipe is fixedly connected to the positioning beam by a threaded part.
[0011] Furthermore, a directional auxiliary sleeve is fixedly connected to the upper end surface of the above-mentioned pushing rod. The directional auxiliary sleeve is sleeved outside the connecting pipe.
[0012] Furthermore, an annular binding rubber band is provided at one end of the positioning beam away from the positioning frame. After elastically binding the steel bars, the annular binding rubber band is hung on the hook. The hook is fixedly connected to the end of the positioning beam near the annular binding rubber band.
[0013] An operation method of a positioning error detection device for the upper-layer transverse steel bars of a box girder floor slab includes the following steps: Step 1: According to the longitudinal spacing dimension of the transverse steel bars to be detected designed, adjust the spacing of the error detection fixture on the positioning beam, and symmetrically install the springs on both sides. The installation distance of the connecting columns is greater than the error range of the transverse steel bars to be detected; Step 2: Use the detection device for the upper-layer transverse steel bars of the box girder floor slab to arrange and measure near the longitudinal middle of the box girder steel bars. Adjust the height of the positioning frame. First, fix the two positioning frames to the header bars at the end of the box girder on the top-layer steel bars of the floor slab, and snap the error detection fixture onto the transverse steel bars to be detected; Step 3: After being snapped in, use a circularly bundled rubber band to tie the end of the positioning beam to the longitudinal steel bars, so that the positioning beam remains horizontal and the error detection fixture is clamped on each transverse steel bar to be detected to complete the detection of the transverse steel bars to be detected; Step 4: Read and record the distance that the error detection fixture of the detected transverse steel bar moves on the positioning beam, and obtain the size of the steel bar positioning error by subtracting the detected data from the theoretical data, so as to obtain the error detection calculation of the first round of transverse steel bars to be detected; Step 5: After the last transverse steel bar in Step 4 is adjusted to meet the positioning requirements, use it again as the positioning reference steel bar for the next round of detection, and repeat the operations in Steps 1-4 to complete the error detection of the transverse steel bars in the next round; Step 6: Repeat the operation in Step 5 until all the transverse steel bar error detections are completed.
[0014] Advantages of the present invention: Compared with the prior art, the effects of the present invention are as follows: 1) One end of the positioning beam of the present invention is fixed to the positioning reference steel bar on the bottom plate of the box girder (select the upper steel bar formed by folding the door head bar at the bottom plate at the starting position, and then select the last transverse steel bar after each detection as the positioning reference steel bar after the positioning is adjusted), and the detection error of the transverse steel bar positioning is obtained according to the data of the relative theoretical value movement of multiple error detection fixtures installed on the positioning beam. It can quickly realize the detection of the transverse steel bar positioning error, greatly improve the detection efficiency and accuracy of the transverse steel bar. The error detection fixture is movably sleeved on the positioning beam and is connected by springs that can move on both sides. It can be adjusted according to the error detection needs of the steel bar binding position, has a wide range of applications, greatly reduces the cost of the detection equipment, the equipment operation is simple, the adjustment is convenient and fast, and scale lines are set, which can quickly realize the direct reading of the position of the error detection fixture, improve the position adjustment accuracy of the error detection fixture and the detection efficiency; 2) The structure of the V-shaped card slot and the square movable sleeve is adopted, which is convenient for sleeving, simple in operation, and the positioning error detection with the square positioning beam is accurate. The V-shaped structure can adapt to the positioning error detection of different transverse steel bar diameters; 3) The spring structure is arranged in the strip-shaped groove, the installation space is larger, it is more convenient for installation, the plug-in method is adopted, the installation and disassembly are easy, it is convenient and fast to change positions according to needs, the spring connecting plate is set to be more convenient for installing the spring, and fine scale lines are set, which is beneficial to reading the error size and improving the error reading accuracy; 4) The threaded column connection is adopted, which is convenient for manufacturing and installation, and the nut is used for locking, which can avoid the skew of the V-shaped card slot caused by the force on the V-shaped card slot after the stud connection, and improve the reliability of the stud connection; 5) A level is set, which can facilitate the reading of the positioning error of the transverse steel bar after the positioning beam is positioned horizontally, making the positioning error detection accuracy of the transverse steel bar higher; 6) The driving and locking mechanism composed of a push rod, a connecting rod, a connecting pipe, a tension spring and a tension rod drives the V-shaped fixed clamp to clamp and fix the positioning reference steel bar, realizing reliable positioning, convenient operation, accurate error detection, and being able to adapt to clamping of different steel bar diameters, with a wide application range, low cost. Moreover, the push rod moves directionally in the vertical strip-shaped through hole, with good stability; 7) The connecting pipe is connected to the positioning beam by a threaded part, which can realize height adjustment, is convenient and fast to adjust, and can cooperate with the height adjustment function of the stud, thus adapting to the requirements of different heights at both ends of the box girder bottom plate; 8) A directional auxiliary sleeve is set, which can play a better guiding stability and avoid the problem of poor directional movement stability caused by the poor rigidity of the opening of the connecting pipe; 9) After using the annular binding rubber belt to bind the steel bars, it can ensure that the error detection fixture tightly fits onto the transverse steel bar to be detected, improving the accuracy of error detection. There is no need to manually press the positioning beam, and the error data can be directly read after installation, improving the efficiency and accuracy of steel bar positioning error detection; 10) For the operation method of the transverse steel bar positioning error detection device, the starting position at the end uses the door-shaped steel bar integrated with the lower-layer steel bar at the end of the bottom plate as the starting position, and cooperates with the positioning error detection of the error detection fixture, which can realize the positioning error of the transverse steel bar on the bottom plate, and the positioning error detection efficiency and positioning error detection accuracy, saving time and effort in error detection. Description of the Drawings
[0015] Figure 1 It is a structural schematic diagram of the detection device for the upper-layer transverse steel bars of the box girder bottom plate; Figure 2 It is a structural schematic diagram of the installation position of the error detection fixture; Figure 3 It is a structural schematic diagram of the installation position of the positioning frame; Figure 4 It is a structural schematic diagram of the spring mounting plate; Figure 5 It is a sectional structural schematic diagram of the installation position of the error detection fixture; Figure 6 It is a sectional structural schematic diagram of the installation position of the error detection fixture; Figure 7 It is a structural schematic diagram of the layout of the transverse steel bars at the end of the box girder steel bars; Figure 8 It is a front view structural schematic diagram of the door-shaped steel bar. Detailed Embodiments
[0016] The invention will be further introduced below in conjunction with the drawings and specific embodiments.
[0017] Embodiment 1: As Figures 1-8As shown in the figure, a positioning error detection device for the upper-layer transverse steel bars of the box girder bottom plate includes a strip-shaped positioning beam 1, an error detection fixture 2, and a positioning bracket 3. One end of the positioning beam 1 is fixedly connected to the positioning bracket 3, and the positioning bracket 3 is used for detachably fixing and connecting to the positioning reference steel bar 4. A plurality of error detection fixtures 2 are movably sleeved on the positioning beam 1. Springs 5 are symmetrically connected to both sides of each error detection fixture 2, and the other ends of the springs 5 are fixedly connected to the connecting columns 10, and the connecting columns 10 are fixedly connected to the positioning beam 1. A plurality of error detection fixtures 2 can be inserted into a plurality of transverse steel bars 6 to be detected arranged longitudinally. Scale lines 101 are provided on the positioning beam 1. The positioning bracket is fixedly connected to the positioning reference steel bar 4, and a plurality of error detection fixtures face the plurality of transverse steel bars 6 to be detected and are in close contact with them, so as to quickly detect the positioning accuracy of the transverse steel bars to be detected.
[0018] Specifically, the error detection fixture 2 includes a movable sleeve 201 and an inverted V-shaped card slot 202. The movable sleeve 201 adopts a square sleeve structure and is movably sleeved on the positioning beam 1 with a square cross-section. The upper end of the V-shaped card slot 202 is fixedly connected to the middle of the bottom side of the movable sleeve 201, and the width direction of the slot part of the V-shaped card slot 202 is arranged along the length direction of the positioning beam 1. The structure of the V-shaped card slot and the square movable sleeve is convenient for sleeving and simple to operate. The positioning error detection is accurate in cooperation with the square positioning beam. The V-shaped structure can adapt to the positioning error detection of different transverse steel bar diameters. Scale lines 101 are provided on the positioning beam 1. By setting the scale lines, the position of the error detection fixture can be quickly adjusted, and the adjustment efficiency of the error detection fixture can be improved.
[0019] Specifically, a threaded column 203 is provided at the upper end of the V-shaped card slot 202. The threaded column 203 is screwed into the center of the bottom of the movable sleeve 201 and locked with a nut 204. The threaded column connection is convenient for manufacturing and installation, and the nut is used for locking, which can avoid the skew of the V-shaped card slot caused by the force on the V-shaped card slot after the stud connection, and improve the reliability of the stud connection.
[0020] Specifically, an installation through hole 103 is provided in the middle of the top of the positioning beam 1, and a level 102 is installed in the installation through hole 103. The top surface of the level 102 is not higher than the top of the positioning beam 1. By setting the level, it is convenient to detect the positioning error of the transverse steel bars after the positioning beam is leveled, and the positioning error detection accuracy of the steel bars is higher.
[0021] Specifically, a strip-shaped groove 11 is provided in the middle of the side surface of the positioning beam 1 along the length direction, and evenly spaced positioning holes 12 are provided in the strip-shaped groove 11. The connecting column 10 is a stepped column, and its small end can be inserted into the positioning hole 12. Spring connecting plates 20101 are provided in the middle of both sides of the movable sleeve 201, and the spring connecting plates 20101 are embedded in the strip-shaped groove 11. After the spring 5 connects the spring connecting plates 20101 and the connecting column 10, it remains parallel to the positioning beam 1. Fine scale lines 13 are provided on the lower side of the strip-shaped groove 11. By arranging the strip-shaped groove to set the spring structure, the installation space is larger and it is more convenient for installation. The plug-in method is adopted, so it is easy to install and disassemble, and it is convenient and fast to change positions according to needs. The spring connecting plates 20101 are provided to facilitate the installation of the spring. The fine scale lines are provided to facilitate reading the error size and improve the error reading accuracy.
[0022] Specifically, the positioning frame 3 includes a fixed clamp 301, a connecting rod 302, a pushing rod 303, a connecting pipe 304, and a stretching rod 305. The connecting pipe 304 is fixedly connected to one end of the positioning beam 1. The fixed clamp 301 is in a lying V-shaped structure and there are two of them. The upper ends are symmetrically hinged at the U-shaped notches 306 on both sides of the lower end of the connecting pipe 304, and the groove parts of the two fixed clamps 301 are arranged oppositely to form a positioning steel bar clamping part. Two pushing arms 307 that are bent and extended integrally with the upper ends of the two fixed clamps 301 are provided. The upper ends of the two pushing arms 307 are respectively hinged to one ends of the two connecting rods 302. The other ends of the two connecting rods 302 are symmetrically hinged to both ends of the horizontal pushing rod 303. The pushing rod 303 horizontally and movably passes through the vertical strip-shaped through hole 308 provided on the connecting pipe 304. A stretching spring 314 abuts against the middle part of the bottom side of the pushing rod 303. The stretching spring 314 is located inside the connecting pipe 304 and its lower end abuts against the spring fixing plate 315. The spring fixing plate 315 is fixedly connected inside the connecting pipe 304 and is located above the U-shaped notch 306. The lower end of the stretching rod 305 can abut against the middle part of the pushing rod 303 and is built into the connecting pipe 304. The upper end of the stretching rod 305 movably extends out of the guiding sleeve 309. The guiding sleeve 309 is fixedly connected to the upper end of the connecting pipe 304. When in use, in the original state, under the action of the stretching spring, the two fixed clamps are kept closed. If positioning is required and the clamping force is too large and it is difficult to directly press onto the positioning reference steel bar, the stretching rod is used to pull upwards, thereby opening the two fixed clamps to insert the positioning reference steel bar. Then the stretching rod is released, and under the action of the pulling rope spring (the spring force can ensure stable clamping), the positioning reference steel bar is automatically clamped. When it needs to be disassembled after the error detection is completed, the stretching rod is operated to move upwards again to open the fixed clamps and take out the positioning frame. The driving and locking mechanism composed of the pushing rod, connecting rod, connecting pipe, stretching spring, and stretching rod is used to drive the V-shaped fixed clamps to clamp and fix the positioning reference steel bar, realizing reference fixing. The positioning is reliable, the operation is convenient, the error detection is accurate, and it can adapt to clamping of different steel bar diameters, with a wide application range, low cost, and the pushing rod moves directionally in the vertical strip-shaped through hole, with good stability. The connecting pipe 304 is fixedly connected to the positioning beam 1 through a threaded part and is locked with a locking nut 310. A step 311 is provided at the bottom of the connection between the positioning beam 1 and the connecting pipe 304, and the horizontal step surface is closed with a baffle 312. A directional auxiliary sleeve 313 is fixedly connected to the upper end surface of the pushing rod 303. The directional auxiliary sleeve 313 is connected outside the connecting pipe 304. The setting of the directional auxiliary sleeve can provide better guiding stability and avoid the problem of poor directional movement stability caused by the reduced rigidity of the opening of the connecting pipe. The lower ends of the two fixed clamps are provided with an eight-shaped bending guiding part, which is convenient for sending the fixed clamps onto the positioning reference steel bar for fixation.
[0023] In order to stabilize the reading positioning error, an annular binding rubber band 7 is provided at one end of the positioning beam 1 away from the positioning frame 3. After the annular binding rubber band 7 elastically binds the longitudinal steel bars, it is hung on the hook 8. The hook 8 is fixedly connected to the end of the positioning beam 1 near the annular binding rubber band 7. After using the annular binding rubber band to bind the steel bars, it can ensure that the error detection fixture closely adheres to the transverse steel bars to be detected, improve the accuracy of error detection, and there is no need to manually press the positioning beam. The error data can be directly read after installation, which improves the detection efficiency and accuracy of the steel bar positioning error.
[0024] Embodiment 2: The operation method of a positioning error detection device for the upper-layer transverse steel bars of a box girder floor slab includes the following steps: Step 1: According to the longitudinal spacing dimension of the transverse steel bars to be detected designed, adjust the spacing of the error detection fixture on the positioning beam, and symmetrically install the springs on both sides. The installation distance of the connecting columns is greater than the error range of the transverse steel bars to be detected; Step 2: Use the detection device for the upper-layer transverse steel bars of the box girder floor slab to arrange and measure near the longitudinal middle of the box girder steel bars. Adjust the height of the positioning frame. First, fix the two positioning frames to the top-layer steel bars of the door head steel bars at the ends of the box girder on the floor slab, and snap the error detection fixture onto the transverse steel bars to be detected; Step 3: After snapping in, use the annular binding rubber band to bind the end of the positioning beam to the longitudinal steel bars, so that the positioning beam remains horizontal and the error detection fixture is clamped tightly on each transverse steel bar to be detected to complete the detection of the transverse steel bars to be detected; Step 4: Read and record the distance that the error detection fixture of the detected transverse steel bars moves on the positioning beam. Subtract the detected data from the theoretical data to obtain the size of the steel bar positioning error, and obtain the error detection calculation of the first round of transverse steel bars to be detected; Step 5: After the last transverse steel bar in Step 4 passes the adjustment and meets the positioning, use it again as the positioning reference steel bar for the next round of detection, and repeat the operations in Steps 1-4 to complete the error detection of the next round of transverse steel bars; Step 6: Repeat the operation in Step 5 until all the transverse steel bar error detections are completed.
[0025] The operation method of the transverse steel bar positioning error detection device uses the door head steel bars integrated with the lower-layer steel bars at the end of the floor slab as the starting position at the end, and cooperates with the positioning error detection of the error detection fixture, which can realize the positioning error of the transverse steel bars on the floor slab, and the detection efficiency and accuracy of the positioning error. The error detection is time-saving and labor-saving.
[0026] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.
Claims
1. A positioning error detection device for the upper-layer transverse steel bars of the box girder bottom slab, characterized in that It includes a strip-shaped positioning beam (1), an error detection fixture (2) and a positioning frame (3). One end of the positioning beam (1) is fixedly connected to the positioning frame (3), and the positioning frame (3) is used for detachably and fixedly connecting to the positioning reference steel bar (4). A plurality of error detection fixtures (2) are movably sleeved on the positioning beam (1). Springs (5) are symmetrically connected to both sides of each error detection fixture (2), and the other ends of the springs (5) are fixedly connected to the connecting column (10), and the connecting column (10) is fixedly connected to the positioning beam (1). A plurality of error detection fixtures (2) can be inserted into a plurality of horizontally arranged transverse steel bars (6) to be detected longitudinally. Scale lines (101) are provided on the positioning beam (1).
2. The positioning error detection device for the upper layer transverse steel bars of the box girder bottom plate according to claim 1, characterized in that, The error detection fixture (2) includes a movable sleeve (201) and an inverted V-shaped card slot (202). The movable sleeve (201) adopts a square sleeve structure and is movably sleeved on the positioning beam (1) with a square cross-section. The upper end of the V-shaped card slot (202) is fixedly connected to the middle of the bottom side of the movable sleeve (201), and the width direction of the slot part of the V-shaped card slot (202) is arranged along the length direction of the positioning beam (1).
3. The positioning error detection device for the upper-layer transverse steel bars of the box girder bottom plate according to claim 2, characterized in that, A threaded column (203) is provided at the upper end of the V-shaped card slot (202), and the threaded column (203) is screwed to the center of the bottom of the movable sleeve (201) and locked with a nut (204).
4. The positioning error detection device for the upper-layer transverse steel bars of the box girder bottom slab according to claim 1, characterized in that A spirit level (102) is provided in the middle of the top of the positioning beam (1).
5. The positioning error detection device for the upper layer transverse steel bars of the box girder bottom slab according to claim 2, characterized in that, A strip-shaped groove (11) is arranged in the middle of the side surface of the positioning beam (1) along the length direction. Positioning holes (12) with uniform intervals are arranged in the strip-shaped groove (11). The connecting column (10) adopts a stepped column, and its small end can be inserted into the positioning hole (12). Spring connecting plates (20101) are arranged in the middle of both sides of the movable sleeve (201). The spring connecting plates (20101) are embedded in the strip-shaped groove (11). After the spring (5) connects the spring connecting plate (20101) and the connecting column (10), it is parallel to the positioning beam (1). Fine scale lines (13) are provided on the lower side of the strip-shaped groove (11).
6. The positioning error detection device for the upper layer transverse steel bars of the box girder bottom plate according to claim 1, characterized in that, The positioning frame (3) includes a fixed clamp (301), a connecting rod (302), a pushing rod (303), a connecting pipe (304) and a stretching rod (305). The connecting pipe (304) is fixedly connected to one end of the positioning beam (1). The fixed clamp (301) is in a lying V-shaped structure, and two of them are used. The upper ends are symmetrically hinged at the U-shaped notches (306) on both sides of the lower end of the connecting pipe (304), and the groove parts of the two fixed clamps (301) are arranged oppositely to form a positioning steel bar clamping part. Two pushing arms (307) which are bent and extended integrally with the upper ends of the two fixed clamps (301) are provided. The upper ends of the two pushing arms (307) are respectively hinged to one ends of the two connecting rods (302). The other ends of the two connecting rods (302) are symmetrically hinged to both ends of the horizontal pushing rod (303). The pushing rod (303) horizontally moves through a vertical strip-shaped through hole (308) provided on the connecting pipe (304). A tension spring (314) abuts against the middle part of the bottom side of the pushing rod (303). The tension spring (314) is located inside the connecting pipe (304) and the lower end abuts against a spring fixing plate (315). The spring fixing plate (315) is fixedly connected inside the connecting pipe (304) and is located above the U-shaped notch (306). The lower end of the stretching rod (305) can abut against the middle part of the pushing rod (303) and is built into the connecting pipe (304). The upper end of the stretching rod (305) moves through a guide sleeve (309). The guide sleeve (309) is fixedly connected to the upper end of the connecting pipe (304).
7. A positioning error detection device for the upper layer of transverse steel bars of a box girder bottom plate according to claim 6, characterized in that, The connecting pipe (304) is fixedly connected to the positioning beam (1) by a threaded part.
8. A positioning error detection device for the upper layer of transverse steel bars of the box girder bottom plate according to claim 6, characterized in that, A directional auxiliary sleeve (313) is fixedly connected to the upper end surface of the pushing rod (303). The directional auxiliary sleeve (313) is connected outside the connecting pipe (304).
9. A positioning error detection device for the upper-layer transverse steel bars of the box girder bottom slab according to claim 1, characterized in that, An annular bundling rubber belt (7) is arranged at one end of the positioning beam (1) far away from the positioning frame (3). After the annular bundling rubber belt (7) elastically bundles the steel bars, it is hung on a hook (8). The hook (8) is fixedly connected to the end of the positioning beam (1) near the annular bundling rubber belt (7).
10. The operating method of a positioning error detection device for the upper layer transverse steel bars of a box girder floor, as claimed in claim 9, wherein The method includes the following steps: Step 1: According to the longitudinal spacing dimension of the transverse steel bars to be detected designed, adjust the spacing of the error detection fixture on the positioning beam, and symmetrically install the springs on both sides. The installation distance of the connecting columns is greater than the error range of the transverse steel bars to be detected; Step 2: Arrange the detection device for the upper-layer transverse steel bars of the box girder bottom plate near the longitudinal middle of the box girder steel bars and measure at the same time. Adjust the height of the positioning frame. First, fix the two positioning frames to the header bars at the end of the box girder on the top-layer steel bars of the bottom plate, and clamp the error detection fixture onto the transverse steel bars to be detected; Step 3: After clamping, use the annular bundling rubber belt to bundle the end of the positioning beam to the longitudinal steel bars, so that the positioning beam remains horizontal and the error detection fixture clamps tightly on each transverse steel bar to be detected to complete the detection of the transverse steel bars to be detected; Step 4: Read the moving distance of the error detection fixture of the detected transverse steel bars on the positioning beam and record it. Obtain the size of the steel bar positioning error by subtracting the detected data from the theoretical data, and obtain the error detection calculation of the first round of transverse steel bars to be detected; Step 5: After the last horizontal steel bar in Step 4 meets the positioning requirements through adjustment, it is used again as the positioning reference steel bar for the next round of detection, and the operations in Steps 1-4 are repeated to complete the horizontal steel bar error detection for the next round; Step 6: Repeat the operation in Step 5 until all additional horizontal steel bar error detections are completed.