Non-matching assembly manufacturing and precision control method of steel box girder segments

Abstract

The present invention discloses a method for matching-free assembly and precision control of steel box girder segments. A measurement control network is set to control the accuracy of setting steel box girder segments and the position of a measurement and positioning device used to position and install the steel box girder segments. The measurement and positioning device is then used as a reference point to locate the center line and position of each assembly unit of the steel box girder segment, such as a bottom plate, a top plate, a web plate, and a partition. This enables high-precision matching-free assembly and manufacturing, replacing the conventional multi-segment continuous matching manufacturing process of steel box girders, and reducing the dependence of the steel box girder manufacturing process on large sites. In particular, for transportation-restricted scenarios such as cities and mountainous areas, assembly can be preferably performed on-site under site-restricted conditions, while improving the manufacturing accuracy and installation and transportation efficiency of the steel box girder.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge steel box girder manufacturing, and more specifically, to a method for non-matching assembly manufacturing and precision control of steel box girder segments. Background Art

[0002] At present, steel box girders are commonly used as a main beam structure in bridge engineering. Based on their superior spanning capacity and simple structural form, they are often used in large-span sea-crossing bridges and urban cross-line bridges. However, due to the large cross-section and span of steel box girders, and the need for continuous matching and assembly of multiple sections, they usually require large independent factories for assembly and manufacturing. They are processed and manufactured in sections in the factory and then transported to the site for installation. This multi-segment continuous matching manufacturing method requires a large manufacturing site area and high transportation route requirements. It has poor adaptability to transportation-restricted scenes such as cities and mountainous areas, and has long transportation distances, long transportation times, and high overall costs. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a method for non-matching assembly manufacturing and precision control of steel box girder segments to replace the multi-segment continuous matching manufacturing method of steel box girders in the prior art, thereby reducing the requirements for site area and reducing manufacturing costs.

[0005] In order to achieve these purposes and other advantages according to the present invention, a method for non-matching assembly manufacturing and precision control of steel box girder segments is provided, comprising the following steps:

[0006] S1. Determine the installation position of the tire frame for assembling the steel box girder, set up multiple measurement towers on the outer sides of both ends of the tire frame, accurately establish the measurement base station, and arrange the measurement control network;

[0007] S2. Install the tire frame and set the longitudinal and transverse reference lines of the positioning steel box girder and the center line of the bridge axis on the tire frame through the measurement control network;

[0008] S3. Measuring and positioning devices are respectively arranged at both ends of the tire frame. Two sets of measuring and positioning devices are respectively arranged at the head and tail ends of the steel box girder, which are used as positioning reference points in the assembly process of the steel box girder and as limit fixing mechanisms for structural matching. A tooling for installing matching connectors of the steel box girder is arranged on the measuring and positioning devices;

[0009] S4. Using the measuring and positioning device as a reference, locate the middle floor plate unit at the center line of the bridge shaft and weld it, and assemble other floor plate units symmetrically on both sides of the bridge shaft center line according to the longitudinal and transverse reference lines;

[0010] S5. Using the horizontal reference line of the steel box girder as a reference, position and assemble the middle transverse diaphragm unit. After inspection, position and fix it, and weld the longitudinal welds of all transverse diaphragm units and the bottom plate in sequence;

[0011] S6. Using the measuring and positioning device as a reference, locate the side web plate unit and the longitudinal diaphragm plate unit, connect the side web plate unit and the longitudinal diaphragm plate unit through the measuring and positioning device, and adjust the angles of the side web plate unit and the longitudinal diaphragm plate unit relative to the bottom plate. After the positioning is completed, fix them. After inspection, weld the welds between the side web plate unit and the longitudinal diaphragm plate unit and the bottom plate and the transverse diaphragm plate.

[0012] S7. Using the measuring and positioning device as a reference, locate the middle roof unit, and assemble the other roof units progressively from the middle to both sides. After the positioning inspection is qualified, weld the roof butt weld;

[0013] S8. Install matching connectors for the steel box beam according to the position of the tooling on the measuring and positioning device;

[0014] S9, record the positioning reference setting method and position of the measuring and positioning devices at both ends of the steel box girder during the assembly process, measure the assembly dimensions of the steel box girder, open the measuring and positioning device at one end if it is qualified, and transport the lower tire frame by the beam transport vehicle;

[0015] S10, assemble the next segment steel box girder, reverse the assembly direction, use the tail measuring and positioning device of the previous segment steel box girder as the head measuring and positioning device of the next segment steel box girder, and adjust the positioning reference setting method and position of the measuring and positioning devices at both ends accordingly, and then repeat steps S3-S9 in sequence to complete the assembly and manufacture of other segment steel box girders.

[0016] Preferably, the measuring and positioning device comprises:

[0017] The main frame is a steel structure frame and is extended along the width direction of the steel box girder. The bottom plate, top plate and web plate of the main frame corresponding to the steel box girder are respectively provided with electric telescopic rods in the direction toward the tire frame. The electric telescopic rods are extended and retracted along the length direction of the steel box girder.

[0018] A clamping and positioning mechanism, which includes a clamp base, a positioning steel plate, a screw and a pair of clamping steel plates, the clamp base is connected to the telescopic end of the dynamic telescopic rod, the positioning steel plate, the screw and the pair of clamping steel plates are respectively arranged on the side of the clamp base facing away from the electric telescopic rod, wherein the positioning steel plate is horizontally arranged and fixedly connected to the upper end of the clamp base, a vertically penetrating screw hole is provided on the positioning steel plate, a pair of clamping steel plates are horizontally arranged and located directly below the positioning steel plate, the lower clamping steel plate is fixedly connected to the bottom of the clamp base, a sliding groove is vertically provided on the surface of the clamp base between the lower clamping steel plate and the positioning steel plate, the screw is vertically arranged and is screwed downward and connected to the upper clamping steel plate through a bearing after passing through the screw hole, and the clamping and loosening between the pair of clamping steel plates are achieved by rotating the screw;

[0019] The measuring and positioning device is respectively provided with a plurality of electric telescopic rods and clamping and positioning mechanisms for the bottom plate, web plate and top plate units of the steel box girder. Each pair of clamping steel plates is used to clamp the corresponding side ends of the bottom plate, web plate or top plate unit. By adjusting the clamping degree between a pair of clamping steel plates, the angle of the bottom plate, web plate or top plate unit can be adjusted, and fixed positioning can be achieved after clamping.

[0020] Preferably, a sliding track is provided at the bottom of the main frame at one end along the length direction of the steel box girder, and the main frame can move forward and backward on the sliding track so as to move back and forth during the assembly of the steel box girder, thereby providing an operating space for the assembly operation.

[0021] Preferably, an electric telescopic rod and a clamping positioning mechanism are respectively arranged at the central axis position and the corner inflection point position of the bottom plate and the top plate of the steel box girder, corresponding to the axis position of the web plate, and at the top and bottom of the web plate.

[0022] Preferably, in step S9, the positioning adjustment of the steel box girder by the measuring and positioning device is achieved through the movement of the electric telescopic rod, and the telescopic length L of each electric telescopic rod is recorded. Each time a segment of the steel box girder is assembled, the telescopic length of each electric telescopic rod in the measuring and positioning device corresponding to the head and tail of the current segment of the steel box girder is adjusted to the corresponding value L.

[0023] Preferably, the telescopic length L is recorded manually or by a telescopic rod control system. The telescopic rod control system includes a display terminal, a calculation module, and a detection module that are electrically connected in sequence. The detection module is electrically connected to the electric telescopic rod and is used to detect the telescopic data of the electric telescopic rod. The calculation module is used to convert the final telescopic length L of the electric telescopic rod and send it to the display terminal for statistical display.

[0024] Preferably, in step S9, when measuring the assembly dimensions of the steel box girder, the diagonal line of the steel box girder, the positioning deviation of the top and bottom plates, the verticality of the partition, and the deviation of the longitudinal centerline of the bridge are measured.

[0025] The present invention includes at least the following beneficial effects: the method for non-matching assembly manufacturing and precision control of steel box girder segments of the present invention controls the accuracy of setting the steel box girder segments and the position of the measuring and positioning device used to position and install the steel box girder segments by setting a measuring control network, and accurately lays out the tire frame, and then uses the measuring and positioning device as a reference point to locate the center line and position of each assembly unit such as the bottom plate, top plate, web plate, and partition plate of the steel box girder segment, and uses the end measuring and positioning device as an auxiliary matching control key point to sequentially locate and assemble the bottom plate, partition plate, web plate, and top plate units, and then passes The position coordinates and expansion amount of the end measuring device are used as the installation positioning control coordinates of the next segment steel box girder plate unit to achieve smooth docking of the segments without matching conditions, which can greatly reduce the site area required for the manufacturing of multiple segments continuously matching, realize on-site high-precision non-matching manufacturing, replace the conventional multi-segment continuous matching manufacturing process of steel box girders, and reduce the dependence of the steel box girder manufacturing process on large sites. Especially for transportation-restricted scenarios such as cities and mountainous areas, it can be preferably assembled on-site under site-restricted conditions, while improving the manufacturing accuracy and installation and transportation efficiency of steel box girders.

[0026] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention when the tire frame is installed;

[0028] Figure 2 It is a structural schematic diagram of the present invention when the bottom plate, side web plate and longitudinal diaphragm of the steel box beam are assembled in sequence;

[0029] Figure 3 It is a schematic diagram of the structure of the present invention when assembling the transverse partition;

[0030] Figure 4 It is a schematic diagram of the structure of the present invention when assembling the top plate;

[0031] Figure 5 A schematic diagram of the structure of a measuring and positioning device according to an embodiment of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a clamping and positioning mechanism according to an embodiment of the present invention;

[0033] Description Figure Numbers:

[0034] 1. Tire frame, 2. Measuring tower, 3. Measuring and positioning device, 4. Bottom plate, 5. Horizontal partition, 6. Longitudinal partition, 7. Side web, 8. Top plate, 9. Main frame, 10. Electric telescopic rod, 11. Clamp base, 12. Positioning steel plate, 13. Screw, 14. Clamping steel plate, 15. Slide groove, 16. Sliding track, 17. Clamping and positioning mechanism. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0036] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] like Figure 1-4 As shown, the present invention provides a method for non-matching assembly manufacturing and precision control of steel box girder segments, comprising the following steps:

[0038] S1. Combination Figure 1 As shown, the installation position of the tire frame 1 for assembling steel box beams is determined in a workshop with a specific load-bearing capacity, multiple measuring towers 2 are arranged outside the two ends of the tire frame 1, and a measuring base station is accurately established and a measuring control network is arranged. The measuring control network is established by measuring equipment such as a total station.

[0039] S2. Install the tire frame 1. The tire frame 1 should have great rigidity and will not sink or deform during the assembly of the steel box girder. Use the measurement control network to ensure that the tire frame 1 is accurately installed. Then, the longitudinal and transverse reference lines and the center line of the bridge axis of the steel box girder to be assembled are set on the tire frame 1 through the measurement control network.

[0040] S3. Measuring and positioning devices 3 are respectively set at both ends of the tire frame 1. Two sets of measuring and positioning devices 3 are respectively located at the head and tail ends of the steel box girder. After being fixed, they are used as positioning reference points in the assembly process of the steel box girder and as limit fixing mechanisms for structural matching. A tooling for installing matching connectors of the steel box girder is also set on the measuring and positioning device 3. The tooling mainly plays a positioning role, which facilitates the subsequent identification of the installation position of the matching connectors.

[0041] S4. Combination Figure 2As shown, the middle bottom plate 4 unit at the center line of the bridge shaft is positioned and welded based on the measuring and positioning device 3, and the other bottom plate 4 units are assembled symmetrically on both sides of the bridge shaft center line according to the longitudinal and transverse reference lines. The bottom plate 4 unit can be elastically fixed to the tire frame 1 through the horse plate, and after passing the inspection, it is symmetrically welded to complete the assembly of all the bottom plate 4 units in sequence.

[0042] S5. Combination Figure 2 As shown, the middle transverse partition plate 5 units are positioned and assembled based on the horizontal reference line of the steel box girder, and are adjusted and fixed with horse plates or temporary adjustable devices. After inspection, they are positioned and fixed, and the longitudinal welds of all transverse partition plate 5 units and the bottom plate 4 are welded in sequence.

[0043] S6. Combination Figure 2-3 As shown, with the measuring and positioning device 3 as a reference, the side web plate 7 unit and the longitudinal partition plate 6 unit are positioned, the side web plate 7 unit and the longitudinal partition plate 6 unit are connected through the measuring and positioning device 3, and the angles of the side web plate 7 unit and the longitudinal partition plate 6 unit relative to the bottom plate 4 are adjusted. After the positioning is completed, they are fixed. After passing the inspection, the welds between the side web plate 7 unit and the longitudinal partition plate 6 unit and the bottom plate 4 and the transverse partition plate 5 are welded.

[0044] S7, Combination Figure 4 As shown, the middle top plate 8 unit is positioned with the measuring and positioning device 3 as a reference, and the other top plate 8 units are assembled progressively from the middle to both sides. After the positioning inspection is qualified, the butt welds of the top plate 8 are welded.

[0045] S8. Install matching connectors of the steel box girder according to the position of the tooling on the measuring and positioning device 3.

[0046] S9. Record the positioning reference setting method and position of the measuring and positioning devices 3 at both ends of the steel box girder during the assembly process, measure the assembly dimensions of the steel box girder, open the measuring and positioning device 3 at one end if it is qualified, and transport the lower tire frame 1 by the beam transport vehicle.

[0047] S10, assemble the next segment steel box girder, reverse the assembly direction, use the tail measurement and positioning device 3 of the previous segment steel box girder as the head measurement and positioning device 3 of the next segment steel box girder, and adjust the positioning reference setting mode and position of the measurement and positioning devices 3 at both ends accordingly, and then repeat steps S3-S9 in sequence to complete the assembly and manufacture of other segment steel box girders. The adjustment of the pre-arch degree in the steel box girder segment assembly process is not set on the tire frame 1, and the pre-arch effect is achieved by adjusting the relative offset length of the top and bottom plates 4.

[0048] The method for matching-free assembly and precision control of steel box girder segments of the present invention first controls the accuracy of setting steel box girder segments and the position of a measuring and positioning device used to position and install the steel box girder segments by setting a measurement control network, and then uses the measurement and positioning device as a reference point in the measurement control network to locate the center line and position of each assembly unit such as the bottom plate, top plate, web plate, and partition of the steel box girder segment, thereby achieving high-precision matching-free assembly and manufacturing, replacing the conventional multi-segment continuous matching manufacturing process of steel box girders, and reducing the dependence of the steel box girder manufacturing process on large sites. Especially for transportation-restricted scenarios such as cities and mountainous areas, assembly can be preferably carried out on-site under site-restricted conditions, while improving the manufacturing accuracy and installation and transportation efficiency of the steel box girder.

[0049] In another technical solution, Figure 1-6 As shown, the measuring and positioning device 3 includes:

[0050] The main frame 9 is a steel structure frame and is extended along the width direction of the steel box girder. The bottom plate 4, the top plate 8 and the web plate of the main frame 9 corresponding to the steel box girder are respectively provided with electric telescopic rods 10 in the direction toward the tire frame 1. The electric telescopic rods 10 are extended and retracted along the length direction of the steel box girder.

[0051] The clamping and positioning mechanism 17 includes a clamp base 11, a positioning steel plate 12, a screw 13 and a pair of clamping steel plates 14. The clamp base 11 is connected to the telescopic end of the dynamic telescopic rod. The positioning steel plate 12, the screw 13 and the pair of clamping steel plates 14 are respectively arranged on the side of the clamp base 11 facing away from the electric telescopic rod 10. The positioning steel plate 12 is horizontally arranged and fixedly connected to the upper end of the clamp base 11. The positioning steel plate 12 is provided with a vertically penetrating screw hole. The clamping steel plate 14 is horizontally arranged and located directly below the positioning steel plate 12. The lower clamping steel plate 14 is fixedly connected to the bottom of the clamp base 11. The clamp base 11 is provided with a slide groove 15 in the vertical direction on the surface between the lower clamping steel plate 14 and the positioning steel plate 12. The screw 13 is vertically arranged and screwed downward and passed through the screw hole to be connected to the upper clamping steel plate 14 through a bearing. The clamping and loosening between the pair of clamping steel plates 14 is achieved by rotating the screw 13.

[0052] The measuring and positioning device 3 is respectively provided with a plurality of electric telescopic rods 10 and clamping and positioning mechanisms 17 corresponding to the bottom plate 4, web plate, and top plate 8 units of the steel box girder. Each pair of clamping steel plates 14 is used to clamp the corresponding side ends of the bottom plate 4 or web plate or top plate 8 units. By adjusting the clamping degree between a pair of clamping steel plates 14, the angle of the bottom plate 4 or web plate or top plate 8 units can be adjusted, and fixed positioning can be achieved after clamping.

[0053] The main frame 9 is a steel structure frame with great rigidity. An electric telescopic rod 10 and a clamping and positioning mechanism 17 are set corresponding to the key points required to be controlled for each assembly unit of the steel box girder. The electric telescopic rod 10 is extended, and a pair of clamping steel plates 14 of the clamping and positioning mechanism 17 clamp the edge of the top plate 8 or bottom plate 4 or longitudinal partition 6 unit of the steel box girder for positioning and restraint. When the clamping degree is loose, it is convenient to enter the assembly unit, and then it is clamped again. The installation position of the electric telescopic rod 10 and the telescopic length control finally realize the temporary limit, positioning, and fixing functions. For key points such as the central axis position of each bottom plate 4 or web plate or top plate 8 unit, the corner turning point position, etc., under the measurement control network, the measurement and positioning device 3 gives the installation position of the corresponding reference point of each assembly unit, and performs measurement and verification after each segment is assembled.

[0054] In another technical solution, Figure 1-5 As shown, a slide track 16 is provided at the bottom of the main frame 9 at one end along the length direction of the steel box beam, and the main frame 9 can move forward and backward on the slide track 16 to move back and forth during the assembly of the steel box beam, providing an operating space for the assembly operation. A power mechanism such as a hydraulic cylinder can be provided on the slide track 16 to drive and control the movement of the main frame 9, so as to further realize intelligent and precise control of the main frame 9 during the movement process.

[0055] In another technical solution, Figure 1-5 As shown, at the center axis position and the turning point position of the bottom plate 4 and the top plate 8 of the steel box girder, the axis position of the corresponding web plate and the top and bottom of the web plate are respectively provided with an electric telescopic rod 10 and a clamping positioning mechanism 17. According to the structure and sequence of the steel box girder assembly units, it is divided into a bottom plate 4 unit, a top plate 8 unit, a partition plate unit, and a web plate unit. Among them, the bottom plate 4 unit, the top plate 8 unit, and the web plate unit are all consistent with the length of the steel box girder, so the corresponding key control points are set for control to ensure accurate positioning, and the side web plate 7 unit is inclined. In order to ensure the inclination or the verticality of the middle web plate unit, an electric telescopic rod 10 and a clamping positioning mechanism 17 are respectively set at the upper and lower ends of the web plate unit for joint control.

[0056] In another technical solution, in step S9, the positioning and adjustment of the steel box girder by the measuring and positioning device 3 is realized by the movement of the electric telescopic rod 10, and the telescopic length L of each electric telescopic rod 10 is recorded. Each time a segment of the steel box girder is assembled, the telescopic length of each electric telescopic rod 10 in the measuring and positioning device 3 corresponding to the head and tail of the current segment steel box girder is adjusted to the corresponding value L. By recording the numerical value, it is convenient to intuitively obtain the positioning adjustment data at each electric telescopic rod 10. When the installation direction of the steel box girder segment is changed accordingly, it is only necessary to adjust the electric telescopic rod 10 at the corresponding position to the required telescopic length L, so as to control the relative position of each control point at this end and the other end of the upper segment steel box girder to remain unchanged, so as to make the positioning control of the steel box girder intuitive and precise.

[0057] In another technical solution, the telescopic length L is recorded manually or by a telescopic rod control system. The telescopic rod control system includes a display terminal, a calculation module, and a detection module that are electrically connected in sequence. The detection module is electrically connected to the electric telescopic rod 10 and is used to detect the telescopic data of the electric telescopic rod 10. The calculation module is used to convert the final telescopic length L of the electric telescopic rod 10 and send it to the display terminal for statistical display.

[0058] In another technical solution, in step S9, when measuring the assembly dimensions of the steel box girder, the diagonal of the steel box girder, the positioning deviation of the top and bottom plates 4, the verticality of the partition, and the deviation of the longitudinal center line of the bridge are measured to ensure accurate assembly and positioning of the steel box girder segments and ensure assembly quality.

[0059] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for manufacturing and precision control of steel box girder segments without matching, characterized in that: The steps include: S1. Determine the installation position of the tire frame for assembling the steel box girder, set up multiple measurement towers on the outer sides of both ends of the tire frame, accurately establish the measurement base station, and arrange the measurement control network; S2. Install the tire frame and set the longitudinal and transverse reference lines of the positioning steel box girder and the center line of the bridge axis on the tire frame through the measurement control network; S3. Measuring and positioning devices are respectively arranged at both ends of the tire frame. Two sets of measuring and positioning devices are respectively arranged at the head and tail ends of the steel box girder, which are used as positioning reference points in the assembly process of the steel box girder and as limit fixing mechanisms for structural matching. A tooling for installing matching connectors of the steel box girder is arranged on the measuring and positioning devices; S4. Using the measuring and positioning device as a reference, locate the middle floor plate unit at the center line of the bridge shaft and weld it, and assemble other floor plate units symmetrically on both sides of the bridge shaft center line according to the longitudinal and transverse reference lines; S5. Using the horizontal reference line of the steel box girder as a reference, position and assemble the middle transverse diaphragm unit. After inspection, position and fix it, and weld the longitudinal welds of all transverse diaphragm units and the bottom plate in sequence; S6. Using the measuring and positioning device as a reference, locate the side web plate unit and the longitudinal diaphragm plate unit, connect the side web plate unit and the longitudinal diaphragm plate unit through the measuring and positioning device, and adjust the angles of the side web plate unit and the longitudinal diaphragm plate unit relative to the bottom plate. After the positioning is completed, fix them. After inspection, weld the welds between the side web plate unit and the longitudinal diaphragm plate unit and the bottom plate and the transverse diaphragm plate. S7. Using the measuring and positioning device as a reference, locate the middle roof unit, and assemble the other roof units progressively from the middle to both sides. After the positioning inspection is qualified, weld the roof butt weld; S8. Install matching connectors for the steel box beam according to the position of the tooling on the measuring and positioning device; S9, record the positioning reference setting method and position of the measuring and positioning devices at both ends of the steel box girder during the assembly process, measure the assembly dimensions of the steel box girder, open the measuring and positioning device at one end if it is qualified, and transport the lower tire frame by the beam transport vehicle; S10, assemble the next segment steel box girder, reverse the assembly direction, use the tail measuring and positioning device of the previous segment steel box girder as the head measuring and positioning device of the next segment steel box girder, and adjust the positioning reference setting method and position of the measuring and positioning devices at both ends accordingly, and then repeat steps S3-S9 in sequence to complete the assembly and manufacture of other segment steel box girders.

2. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 1 is characterized in that: The measuring and positioning device comprises: The main frame is a steel structure frame and is extended along the width direction of the steel box girder. The bottom plate, top plate and web plate of the main frame corresponding to the steel box girder are respectively provided with electric telescopic rods in the direction toward the tire frame. The electric telescopic rods are extended and retracted along the length direction of the steel box girder. A clamping and positioning mechanism, which includes a clamp base, a positioning steel plate, a screw and a pair of clamping steel plates, the clamp base is connected to the telescopic end of the dynamic telescopic rod, the positioning steel plate, the screw and the pair of clamping steel plates are respectively arranged on the side of the clamp base facing away from the electric telescopic rod, wherein the positioning steel plate is horizontally arranged and fixedly connected to the upper end of the clamp base, a vertically penetrating screw hole is provided on the positioning steel plate, a pair of clamping steel plates are horizontally arranged and located directly below the positioning steel plate, the lower clamping steel plate is fixedly connected to the bottom of the clamp base, a sliding groove is vertically provided on the surface of the clamp base between the lower clamping steel plate and the positioning steel plate, the screw is vertically arranged and is screwed downward and connected to the upper clamping steel plate through a bearing after passing through the screw hole, and the clamping and loosening between the pair of clamping steel plates are achieved by rotating the screw; The measuring and positioning device is respectively provided with a plurality of electric telescopic rods and clamping and positioning mechanisms for the bottom plate, web plate and top plate units of the steel box girder. Each pair of clamping steel plates is used to clamp the corresponding side ends of the bottom plate, web plate or top plate unit. By adjusting the clamping degree between a pair of clamping steel plates, the angle of the bottom plate, web plate or top plate unit can be adjusted, and fixed positioning can be achieved after clamping.

3. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 2 is characterized in that: A sliding track is provided at the bottom of the main frame at one end along the length direction of the steel box girder. The main frame can move forward and backward on the sliding track so as to move back and forth during the assembly of the steel box girder, thereby providing an operating space for the assembly operation.

4. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 2, characterized in that: An electric telescopic rod and a clamping positioning mechanism are respectively arranged at the central axis position and the turning point position of the bottom plate and the top plate of the steel box girder, corresponding to the axis position of the web plate, and at the top and bottom of the web plate.

5. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 2, characterized in that: In step S9, the positioning adjustment of the steel box girder by the measuring and positioning device is achieved through the movement of the electric telescopic rod, and the telescopic length L of each electric telescopic rod is recorded. Each time a segment of the steel box girder is assembled, the telescopic length of each electric telescopic rod in the measuring and positioning device corresponding to the head and tail of the current segment of the steel box girder is adjusted to the corresponding value L.

6. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 5, characterized in that: The telescopic length L is recorded manually or by a telescopic rod control system. The telescopic rod control system includes a display terminal, a calculation module, and a detection module that are electrically connected in sequence. The detection module is electrically connected to the electric telescopic rod and is used to detect the telescopic data of the electric telescopic rod. The calculation module is used to convert the final telescopic length L of the electric telescopic rod and send it to the display terminal for statistical display.

7. The method for non-matching assembly manufacturing and precision control of steel box girder segments according to claim 1, characterized in that: In step S9, when measuring the assembly dimensions of the steel box girder, the diagonal line of the steel box girder, the positioning deviation of the top and bottom plates, the verticality of the partition, and the deviation of the longitudinal centerline of the bridge are measured.

Images