A device for forming an integral steel frame for a large-span cast-in-situ box girder

Abstract

The present application relates to the field of cast-in-situ box girder construction technology and discloses a large-span cast-in-situ box girder integral steel bar skeleton forming device, which includes multiple main frames, multiple groups of bottom plate steel bar positioning assemblies, multiple groups of web plate steel bar positioning assemblies, and multiple groups of top plate steel bar positioning assemblies. Two adjacent main frames are connected by one group of bottom plate steel bar positioning assemblies and two groups of top plate steel bar positioning assemblies. The bottom plate steel bar positioning assembly is located at the bottom of the main frame and is used to position the bottom plate steel bars of the box girder. The web plate steel bar positioning assembly is located in the middle of the main frame and is used to position the web plate steel bars of the box girder. The top plate steel bar positioning assembly is located at the top of the main frame and is used to position the top plate steel bars of the box girder. The present application has the effect of saving the time used for hoisting the top plate steel bars, thereby improving construction efficiency.

Description

Technical Field

[0001] The present application relates to the field of cast-in-situ box girder construction technology, and in particular to a large-span cast-in-situ box girder integral steel frame forming device. Background Art

[0002] A box girder is a type of beam used in bridge construction. It is hollow inside and has flanges on both sides. It is a common structural form used in long-span bridges. Before pouring a box girder, the beam reinforcement must be tied to a frame. The reinforcement is then hoisted into the box girder formwork, and concrete is poured into the reinforcement to form the box girder.

[0003] Chinese utility model patent publication number CN204076497U discloses a prefabricated box girder reinforcement binding and positioning cradle, which includes an integral cradle for binding the bottom and web reinforcements and a cradle for binding the top slab reinforcements. The integral cradle for binding the bottom and web reinforcements consists of multiple bracket units I, each spanning a pedestal and arranged along the length of the pedestal. The top slab reinforcement binding cradle consists of multiple bracket units II arranged at intervals.

[0004] The bottom plate reinforcement and web reinforcement are integrally tied on the bottom and web reinforcement integral tying cradle, and the top plate reinforcement is tied on the top plate reinforcement tying cradle. Then, the top plate reinforcement is hoisted onto the web reinforcement using hoisting tools and connected together to complete the prefabricated box girder reinforcement tying.

[0005] Regarding the above-mentioned related technologies, the inventors found that after the top plate steel bars are tied on the top plate steel bar tying frame, they need to be hoisted onto the web steel bars, positioned and connected together with the web steel bars, which is cumbersome and affects construction efficiency. Summary of the Invention

[0006] In order to save the time used for hoisting the top plate steel bars and thus improve construction efficiency, the present application provides a large-span cast-in-place box girder integral steel bar skeleton forming device.

[0007] The present application provides a large-span cast-in-situ box girder integral steel frame forming device adopts the following technical solution:

[0008] A device for forming an integral steel bar skeleton for a large-span cast-in-place box girder comprises multiple main frames, multiple groups of bottom plate steel bar positioning assemblies, multiple groups of web plate steel bar positioning assemblies and multiple groups of top plate steel bar positioning assemblies. Two adjacent main frames are connected by one group of bottom plate steel bar positioning assemblies and two groups of top plate steel bar positioning assemblies. The bottom plate steel bar positioning assembly is located at the bottom of the main frame and is used to position the bottom plate steel bars of the box girder. The web plate steel bar positioning assembly is located in the middle of the main frame and is used to position the web plate steel bars of the box girder. The top plate steel bar positioning assembly is located at the top of the main frame and is used to position the top plate steel bars of the box girder.

[0009] By adopting the above technical scheme, multiple main frames are connected through the bottom plate steel bar positioning assembly and the top plate steel bar positioning assembly, the web steel bar positioning assembly is installed on the main frame, the steel bars of the box beam bottom plate are placed on the bottom plate steel bar positioning assembly, and then the steel bars of the box beam web are placed in the web steel bar positioning assembly and tied to form the box beam bottom and web steel bar cage, and then according to the already positioned box beam bottom and web steel bar cage, the steel bars of the box beam top plate are placed in the top plate steel bar positioning assembly, and the box beam top plate steel bars are tied to form the box beam top plate steel bar mesh, and finally the box beam top plate steel bar mesh and the box beam bottom and web steel bar cage are connected. After the connection is completed, the overall steel bar skeleton of the box beam is formed, and the top plate steel bar positioning assembly and the bottom and web steel bar positioning assembly are all arranged on the same main frame, so that there is no need to hoist the box beam top plate steel bar mesh to the box beam bottom and web steel bar cage, which saves the time used for hoisting the top plate steel bars and thus improves construction efficiency.

[0010] Optionally, the main frame includes a bottom I-beam, two belly U-beams and two top I-beams, the two belly U-beams are welded to the bottom I-beam, the two top I-beams are respectively arranged on the two belly U-beams, the bottom plate steel bar positioning assembly is arranged between the bottom I-beams of two adjacent main frames, the top plate steel bar positioning assembly is arranged between the two adjacent top I-beams of the two main frames, and multiple groups of the web steel bar positioning assemblies are all arranged on the belly U-beam and arranged along the length direction of the belly U-beam.

[0011] By adopting the above technical solution, the number of main frames is determined according to the size of the cast-in-place box girder, the bottom I-beams of the two adjacent main frames are connected by the bottom plate steel bar positioning assembly, the top I-beams of the two adjacent main frames are connected by the top plate steel bar positioning assembly, and then the web steel bar positioning assembly is installed on the belly U-shaped steel, thereby completing the construction of the tire frame.

[0012] Optionally, the web reinforcement positioning assembly includes multiple positioning steel pipes, which are connected by connecting rods. The positioning steel pipes are arranged on the belly U-shaped steel. Support rods are slidably connected inside the positioning steel pipes, and the multiple support rods are connected by pull rods.

[0013] By adopting the above technical solution, when it is necessary to position the longitudinal reinforcement of the box girder web, the support rod is slid toward the middle of the main frame, and the longitudinal reinforcement of the box girder web is placed on the support rod. After completing the binding of the longitudinal reinforcement of the box girder web, the support rod is slid away from the middle of the main frame, thereby pulling the support rod out from under the longitudinal reinforcement of the box girder web, so as to facilitate lifting the longitudinal reinforcement of the box girder web.

[0014] Optionally, the main frame also includes reinforced U-shaped steel, which is vertically arranged and fixedly connected to the bottom I-shaped steel. The top of the reinforced U-shaped steel is fixedly connected to the top of the belly U-shaped steel. A fixing sleeve is coaxially welded on the two positioning steel pipes at the top and bottom, and the fixing sleeve is connected to the reinforced U-shaped steel by fastening bolts.

[0015] By adopting the above technical solution, the two fixing sleeves are connected to the reinforcing U-shaped steel by fastening bolts, thereby completing the installation of a set of web reinforcement positioning components. There is no need to weld each positioning steel pipe to the reinforcing U-shaped steel. The operation is simple and convenient, and it is also easy to disassemble.

[0016] Optionally, the fixing sleeve includes a fixing half ring and two fixing plates, the two fixing plates are fixedly connected to the two ends of the fixing half ring respectively, the fixing half ring is coaxially welded to the positioning steel pipe, a sliding groove is vertically opened on the fixing plate, the fastening bolt passes through the sliding groove, and the width of the sliding groove is greater than the diameter of the fastening bolt.

[0017] By adopting the above technical solution, when positioning the longitudinal reinforcement of the box girder web, the fixed half ring is slid upward to the bottom of the slide groove and abutted against the fastening bolts, and the fastening bolts are tightened to complete the fixation of the positioning sleeve; when the longitudinal reinforcement of the box girder web is tied, the fastening bolts are loosened, and the positioning steel pipe drives the support rod to slide down along the direction of the slide groove, so that the support rod is separated from the box girder web reinforcement, thereby facilitating the support rod to be pulled out from multiple box girder web longitudinal reinforcements.

[0018] Optionally, the bottom plate steel bar positioning assembly includes multiple first longitudinal angle steels and multiple first transverse angle steels, and the multiple first longitudinal angle steels are connected between the bottom I-beams of two adjacent main frames by bolts, and the length direction of the first longitudinal angle steel is perpendicular to the length direction of the bottom I-beam, and the multiple first transverse angle steels are connected to the top surface of the bottom I-beam by bolts, and the length direction of the first transverse angle steel is parallel to the length direction of the bottom I-beam, and the first longitudinal angle steel is provided with multiple first longitudinal positioning slots for positioning the transverse steel bars, and the first transverse angle steel is provided with multiple first transverse positioning slots for positioning the longitudinal steel bars.

[0019] By adopting the above technical solution, multiple first longitudinal angle steels are connected to the bottom I-beams of two adjacent main frames by bolts. After the first longitudinal angle steels are arranged on the bottom I-beam, multiple first transverse angle steels are connected to the bottom I-beam by bolts. Multiple first transverse angle steels are arranged along the length direction of the bottom I-beam, thereby completing the connection of multiple main frames and the installation of the bottom plate steel bar positioning assembly; after the installation is completed, multiple transverse steel bars are first placed in multiple first longitudinal positioning slots respectively, and after the transverse steel bars are arranged, multiple longitudinal steel bars are placed in multiple first transverse positioning slots respectively. After the longitudinal and transverse steel bars are arranged, they are tied to form a steel mesh, thereby completing the positioning and tying of the box girder bottom plate steel bars.

[0020] Optionally, the bottom I-beam includes two auxiliary bottom I-beams, which are arranged along their own length direction. Two bases are provided under the two auxiliary bottom I-beams, which are arranged along the length direction of the bottom I-beam. A lifting assembly is provided on the base, which is used to adjust the inclination slope of the auxiliary bottom I-beam.

[0021] By adopting the above technical solution, the lifting assembly is used to adjust the inclination slope of the two auxiliary bottom I-beams, so that the two auxiliary bottom I-beams are inclined in the middle and low on both sides, thereby making the main frame inclined in the middle and low on both sides, so that the top surface of the box girder is set to a horizontal slope with a high middle and low on both sides.

[0022] Optionally, the lifting assembly includes a lifting screw and a rotating sleeve, the rotating sleeve is rotatably connected to the top surface of the base, the lifting screw is coaxially arranged in the rotating sleeve and is threadedly connected to the rotating sleeve, the top surface of the lifting screw is rotatably connected to a universal ball, and the universal ball abuts against the bottom I-beam.

[0023] By adopting the above technical solution, the rotating sleeves on the two bases located in the middle position are rotated, and the two rotating sleeves drive the two corresponding lifting screws to rise. The two lifting screws push the adjacent ends of the two sub-bottom I-beams to rise, so that the two sub-bottom I-beams are inclined in a high middle and low side form.

[0024] Optionally, an adjusting gear is coaxially fixedly connected to the rotating sleeve, a fixed block is provided on the bottom I-beam, an adjusting rack is slidably connected in the fixed block, the adjusting rack is engaged with the adjusting gear, a push rod is fixedly connected to the adjusting rack, and the push rod is slidably connected in the fixed block.

[0025] By adopting the above technical solution, the push rod is pushed, the push rod drives the adjusting rack to slide, the adjusting rack drives the adjusting gear to rotate, and the adjusting gear drives the rotating sleeve to rotate, thereby completing the driving of the lifting screw to slide.

[0026] Optionally, the fixed block is rotatably connected to multiple distance rods, and the multiple distance rods are arranged at equal intervals along the length direction of the bottom I-beam. Corresponding scale lines are marked on the fixed block under each of the distance rods, and the scale lines are used to determine the sliding distance of the push rod. A positioning block is provided on the push rod, and the positioning block is used to be clamped between two adjacent push rods.

[0027] By adopting the above technical solution, the distance that the push rod needs to be pushed is determined according to the slope of the box beam cross slope that needs to be set, so as to determine the scale line that the push rod needs to reach, and the push rod is pushed. When the push rod is pushed to the point where the positioning block is clamped between two adjacent push rods, the push rod reaches the scale line that needs to be reached, thereby completing the determination of the distance that the push rod needs to be pushed.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. Connect multiple main frames through the bottom plate steel bar positioning assembly and the top plate steel bar positioning assembly, install the web steel bar positioning assembly on the main frame, put the steel bars of the box beam bottom plate into the bottom plate steel bar positioning assembly, and then put the steel bars of the box beam web into the web steel bar positioning assembly and tie them to form the box beam bottom and web steel bar cage. Then, according to the positioned box beam bottom and web steel bar cage, put the steel bars of the box beam top plate into the top plate steel bar positioning assembly, tie the box beam top plate steel bars to form the box beam top plate steel mesh, and finally connect the box beam top plate steel mesh and the box beam bottom and web steel bar cage. After the connection is completed, the overall steel bar skeleton of the box beam is formed. The top plate steel bar positioning assembly and the bottom and web steel bar positioning assemblies are all set on the same main frame, so there is no need to hoist the box beam top plate steel mesh to the box beam bottom and web steel bar cage, which saves the time used for hoisting the top plate steel bars and improves construction efficiency.

[0030] 2. When positioning the longitudinal reinforcement of the box girder web, slide the fixing half ring upward to the bottom of the chute and abut against the fastening bolts, and tighten the fastening bolts to complete the fixation of the positioning sleeve; when the longitudinal reinforcement of the box girder web is tied, loosen the fastening bolts, and the positioning steel pipe drives the support rod to slide down along the direction of the chute, so that the support rod is separated from the box girder web reinforcement, thereby facilitating the removal of the support rod from the multiple box girder web longitudinal reinforcements;

[0031] 3. Use the lifting assembly to adjust the inclination of the two auxiliary bottom I-beams so that the two auxiliary bottom I-beams are inclined in the middle and low on both sides, thereby making the main frame inclined in the middle and low on both sides, so that the top surface of the box girder is set to a horizontal slope with a high middle and low sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0033] Figure 2 This is a top plan view of part of the structure of Example 1 of the present application, mainly used to show the bottom plate steel bar positioning assembly;

[0034] Figure 3 This is a left-side plan view of part of the structure of Example 1 of the present application, mainly used to show the first longitudinal angle steel and the first longitudinal positioning slot;

[0035] Figure 4 This is a front plan view of part of the structure of Example 1 of the present application, mainly used to show the first transverse angle steel and the first transverse positioning slot;

[0036] Figure 5 This is a partial structural plan view of Example 1 of the present application, mainly used to illustrate the web reinforcement positioning assembly;

[0037] Figure 6 This is a left-side cross-sectional view of part of the structure of Example 1 of the present application, mainly used to illustrate the fixing sleeve;

[0038] Figure 7 This is a left-side plan view of part of the structure of Example 1 of the present application, mainly used to show the top plate steel bar positioning assembly;

[0039] Figure 8 This is a partial structural plan view of Example 2 of the present application, mainly used to show the auxiliary bottom I-beam;

[0040] Figure 9 This is a partial structural cross-sectional view of Example 2 of the present application, mainly used to illustrate the lifting assembly;

[0041] Figure 10 This is a partial structural cross-sectional view of Example 2 of the present application, mainly used to illustrate the lifting assembly;

[0042] Figure 11 yes Figure 10 The partial enlarged view of part A in the middle is mainly used to show the distance component;

[0043] Figure 12 This is a partial structural plan view of Example 2 of the present application, mainly used to display the distance component.

[0044] Explanation of the reference numerals: 1. Main frame; 11. Bottom I-beam; 111. Secondary bottom I-beam; 12. Abdomen U-beam; 13. Top I-beam; 14. Support; 141. Base; 1411. Rotation slot; 1412. First limiting slot; 1413. Second limiting slot; 142. Support column; 15. Reinforced U-beam; 2. Bottom plate reinforcement positioning assembly; 21. First longitudinal angle steel; 211. First longitudinal steel plate; 212. Second longitudinal steel plate; 213. First longitudinal positioning slot; 22. First transverse angle steel; 221. First transverse steel plate; 222. Second transverse steel plate; 223. First transverse positioning slot; 3. Web reinforcement positioning assembly; 31. Positioning piece; 311. Positioning steel pipe; 312. Connecting rod; 313. Fixing sleeve; 3131. Fixing half ring; 3132. 3. Fixing plate; 3133. Slide groove; 314. Fastening bolt; 32. Support member; 321. Support rod; 322. Pull rod; 4. Top plate reinforcement positioning assembly; 41. Second longitudinal angle steel; 411. Second longitudinal positioning slot; 42. Second transverse angle steel; 421. Second transverse positioning slot; 5. Lifting assembly; 51. Lifting screw; 511. Card slot; 52. Rotating sleeve; 53. Limiting ring; 54. Universal ball; 55. Adjusting gear; 56. Adjusting rack; 57. Fixing block; 571. Receiving slot; 572. Guide slot; 573. Sliding slot; 58. Push rod; 581. Fixing slot; 582. Steering slot; 6. Distance assembly; 61. Distance rod; 62. Scale line; 63. Limiting sleeve; 64. Positioning sleeve; 65. Limiting block; 66. Positioning block; 67. Limiting plate. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-12 This application is described in further detail.

[0046] The embodiment of the present application discloses a device for forming an integral steel reinforcement skeleton of a large-span cast-in-situ box girder.

[0047] Example 1

[0048] Reference Figure 1A large-span cast-in-situ box girder integral reinforcement skeleton forming device includes a tire frame body, which includes multiple main frames 1. The main frames 1 are horizontally arranged in the length direction, and the multiple main frames 1 are horizontally equidistantly arranged in a direction perpendicular to their length direction. Two adjacent main frames 1 are connected by a bottom plate reinforcement positioning assembly 2 and two sets of top plate reinforcement positioning assemblies 4. The bottom plate reinforcement positioning assembly 2 is located at the bottom of the main frame 1 and is used to position the reinforcement of the bottom plate of the box girder. The main frame 1 is a symmetrical body, and the two sets of top plate reinforcement positioning assemblies 4 are relatively arranged with the symmetry plane of the main frame 1 as the symmetry plane. The two sets of top plate reinforcement positioning assemblies 4 are both located at the top of the main frame 1 and are used to position the reinforcement of the top plate of the box girder. Two sets of web reinforcement positioning mechanisms are arranged in the middle of the main frame 1. The two sets of web reinforcement positioning mechanisms are relatively arranged with the symmetry plane of the main frame 1 as the symmetry plane. The web reinforcement positioning mechanisms are used to position the reinforcement of the two webs of the box girder.

[0049] Determine the number of main frames 1 according to the size of the cast-in-place box girder, connect multiple main frames 1 through the bottom plate steel bar positioning assembly 2 and the top plate steel bar positioning assembly 4, and install the web steel bar positioning mechanism on the main frame 1 to complete the construction of the tire frame. Place the steel bars of the bottom plate of the box girder on the bottom plate steel bar positioning assembly 2, and then place the steel bars of the web of the box girder into the web steel bar positioning mechanism, and tie them to form a steel cage. Then, according to the already positioned box girder bottom and web steel cage, place the steel bars of the top plate of the box girder into the top plate steel bar positioning assembly 4, and tie the steel bars of the top plate of the box girder to form a box girder top plate steel mesh. Finally, connect the box girder top plate steel mesh and the box girder bottom and web steel cage. After the connection is completed, the overall steel skeleton of the box girder is formed, and then the overall steel skeleton of the box girder is hoisted into the beam making formwork for concrete pouring.

[0050] Reference Figure 1The main frame 1 includes a bottom I-beam 11, two abdominal U-beams 12, two top I-beams 13 and four supports 14. The length direction of the bottom I-beam 11 is horizontally arranged, and its length direction is the length direction of the main frame 1. The two abdominal U-beams 12 are welded to the top surface of the bottom I-beam 11 and arranged along the length direction of the bottom I-beam 11. The two abdominal U-beams 12 are relatively arranged with the symmetry plane of the midpoint of the length direction of the bottom I-beam 11 as the symmetry plane, and the top ends of the two abdominal U-beams 12 are inclined away from each other. Reinforcement U-beams 15 are welded between the top ends of the two abdominal U-beams 12 and the bottom I-beam 11, and the reinforcement U-beams 15 are vertically arranged. The two top I-beams 13 are respectively welded to the top ends of the two reinforcing U-beams 15, and the other ends of the two top I-beams 13 are inclined away from the ground. Each of the four supports 14 is fixedly connected to the bottom surface of the bottom I-beam 11 and is equidistantly spaced along the length of the bottom I-beam 11. The supports 14 include a frustum-shaped base 141 and support columns 142. The base 141 is vertically arranged axially. The bottom end of the support column 142 is coaxially fixedly connected to the base 141. The top end of the support column 142 passes through the lower flange plate of the bottom I-beam 11 and is fixedly connected to the bottom surface of the upper flange plate of the bottom I-beam 11.

[0051] Reference Figure 2 and Figure 3 The bottom plate reinforcement positioning assembly 2 includes a plurality of first longitudinal angle steels 21, which are arranged at equal intervals along the length direction of the bottom I-beam 11, and the length direction of the first longitudinal angle steels 21 is perpendicular to the length direction of the bottom I-beam 11. The two ends of the first longitudinal angle steels 21 are respectively located on the top surfaces of the flange plates of two adjacent bottom I-beams 11, and are connected to the bottom I-beams 11 by bolts. The two steel plates on the first longitudinal angle steel 21 are respectively marked as the first longitudinal steel plate 211 and the second longitudinal steel plate 212. The first longitudinal steel plate 211 and the second longitudinal steel plate 212 are arranged vertically, and the first longitudinal steel plate 211 is bolted to the bottom I-beam 11. The second longitudinal steel plate 212 is provided with a plurality of first longitudinal positioning slots 213 at equal intervals along its length direction.

[0052] Reference Figure 2 and Figure 4The top surface of each bottom I-beam 11 is connected to a plurality of first transverse angle steels 22 by bolts. The plurality of first transverse angle steels 22 are arranged at equal intervals along the length direction of the bottom I-beam 11, and each first transverse angle steel 22 is located between two adjacent first longitudinal angle steels 21. The length direction of the first transverse angle steel 22 is parallel to the length direction of the bottom I-beam 11. The two steel plates on the first transverse angle steel 22 are respectively recorded as the first transverse steel plate 221 and the second transverse steel plate 222. The first transverse steel plate 221 and the second transverse steel plate 222 are arranged vertically. The first transverse steel plate 221 is bolted to the bottom I-beam 11, and the second transverse steel plate 222 is provided with a plurality of first transverse positioning slots 223 at equal intervals along its length direction. The first transverse positioning slot 223 and the first longitudinal positioning slot 213 are both arranged in an inverted isosceles trapezoid, and the bottom width of both is greater than the diameter of the box girder reinforcement, and in this embodiment is set to 1.5 times the diameter of the box girder reinforcement.

[0053] Connect multiple first longitudinal angle steels 21 to the bottom I-beams 11 of the two adjacent main frames 1 through bolts. After the first longitudinal angle steels 21 are arranged on the bottom I-beams 11, connect multiple first transverse angle steels 22 to the bottom I-beams 11 through bolts. Multiple first transverse angle steels 22 are arranged along the length direction of the bottom I-beams 11, thereby completing the connection of multiple main frames 1 and the installation of the bottom plate steel bar positioning assembly 2. After the installation is completed, first place multiple transverse steel bars into the multiple first longitudinal positioning slots 213 respectively. After the transverse steel bars are arranged, place multiple longitudinal steel bars into the multiple first transverse positioning slots 223 respectively. After the longitudinal and transverse steel bars are arranged, they are tied to form a steel mesh, thereby completing the positioning and tying of the box beam bottom plate steel bars.

[0054] Reference Figure 1 The two groups of web reinforcement positioning mechanisms are respectively arranged on the side of the two reinforcing U-shaped steels 15 of the main frame 1 away from the other main frame 1. Each group of web reinforcement positioning mechanisms includes multiple groups of web reinforcement positioning components 3. The multiple groups of web reinforcement positioning components 3 are arranged at equal intervals along the length direction of the reinforcing U-shaped steel 15. In this embodiment, the web reinforcement positioning components 3 are set as three groups.

[0055] Reference Figure 5 and Figure 6Each set of web reinforcement positioning assemblies 3 includes a positioning member 31 and a support member 32. The positioning member 31 includes multiple positioning steel tubes 311. The multiple positioning steel tubes 311 are evenly spaced along the length of the reinforcing U-shaped steel 15 and are all located on the side of the reinforcing U-shaped steel 15 facing away from the other main frame 1. The positioning steel tubes 311 are axially perpendicular to the length of the reinforcing U-shaped steel 15. One end of the positioning steel tube 311 abuts the reinforcing U-shaped steel 15, and the other end of the positioning steel tube 311 abuts the abdominal U-shaped steel 12. The multiple positioning steel tubes 311 are connected by connecting rods 312. The connecting rods 312 are fixedly connected to the side of the positioning steel tubes 311 facing away from the reinforcing U-shaped steel 15. The length of the connecting rods 312 is perpendicular to the axial direction of the positioning steel tubes 311. A fixing sleeve 313 is welded to both the top and bottom positioning steel tubes 311 of the same set of positioning members 31. The fixing sleeve 313 comprises a fixing half-ring 3131 and two fixing plates 3132. The fixing half-ring 3131 is coaxially welded to the sidewalls of the positioning steel tube 311. The two fixing plates 3132 are fixedly connected to the ends of the fixing half-ring 3131, with their lengths perpendicular to the axis of the fixing half-ring 3131. The fixing plates 3132 comprise a fitting portion and a transition portion. The transition portion is fixedly connected between the fitting portion and one end of the fixing half-ring 3131 and bends toward the fixing half-ring 3131. A sliding groove 3133 is defined along the length of the fixing plate 3132 on the fitting portion. A fastening bolt 314 is inserted into the sliding groove 3133. The fastening bolt 314 is threaded onto the reinforcing U-shaped steel 15 and is used to secure the fixing sleeve 313 to the reinforcing U-shaped steel 15. The width of the sliding groove 3133 is greater than the diameter of the fastening bolt 314 . When the fastening bolt 314 is loosened, the fixing sleeve 313 can slide vertically along the length direction of the sliding groove 3133 .

[0056] Reference Figure 5 The support member 32 includes multiple support rods 321, each corresponding to a plurality of positioning steel tubes 311. Each support rod 321 is coaxially slidably connected to a corresponding positioning steel tube 311, with both ends of the support rod 321 extending out of the positioning steel tube 311. The ends of the multiple support rods 321 facing away from the other reinforcing U-shaped steel 15 are fixedly connected by a tie rod 322, the length of the tie rod 322 being perpendicular to the length of the support rods 321. When the tie rod 322 is pulled, the support rods 321 slide into the positioning steel tube 311.

[0057] Threaded holes are opened in the reinforced U-shaped steel 15 in advance, and multiple sets of web reinforcement positioning assemblies 3 are fixed to the U-shaped steel by fastening bolts 314. Multiple sets of web reinforcement positioning assemblies 3 are arranged along the length direction of the U-shaped steel. At this time, the fastening bolts 314 abut against the inner bottom wall of the slide groove 3133 of the adjacent fixing plate 3132, completing the positioning of multiple positioning steel pipes 311. Slide the support rod 321 so that the pull rod 322 slides to abut against one end of the positioning steel pipe 311, completing the positioning of the support rod 321. Multiple box girder web longitudinal reinforcements are placed on the multiple support rods 321 respectively, and then the box girder web longitudinal reinforcements are tied to form a reinforcement mesh. The box girder web reinforcement mesh is tied to the box girder bottom plate reinforcement mesh to form a box girder bottom and web reinforcement cage. After the binding is completed, the fastening bolts 314 are loosened, and the positioning steel pipe 311 drives the support rod 321 to slide down along the direction of the slide groove 3133, so that the support rod 321 is separated from the box beam web reinforcement, and the support rod 321 is slid in the direction away from the box beam web reinforcement, so that the support rod 321 is pulled out from the bottom of the box beam and the web reinforcement cage.

[0058] Reference Figure 1 and Figure 7 The top plate reinforcement positioning assembly 4 includes a plurality of second longitudinal angle steels 41, which are arranged at equal intervals along the length direction of the top I-beam 13, and the length direction of the second longitudinal angle steels 41 is perpendicular to the length direction of the top I-beam 13. The two ends of the second longitudinal angle steels 41 are respectively located on the top surfaces of the flange plates of two adjacent top I-beams 13, and are connected to the top I-beam 13 by bolts. A plurality of second longitudinal positioning slots 411 are equidistantly provided on the second longitudinal angle steel 41 along its length direction. A plurality of second transverse angle steels 42 are bolted to the top surface of each top I-beam 13. The plurality of second transverse angle steels 42 are arranged at equal intervals along the length direction of the top I-beam 13, and each second transverse angle steel 42 is located between two adjacent second longitudinal angle steels 41. The length direction of the second transverse angle steels 42 is parallel to the length direction of the top I-beam 13, and a plurality of second transverse positioning slots 421 are equidistantly provided on the second transverse angle steels 42 along its length direction. The second transverse positioning slot 421 and the second longitudinal positioning slot 411 are both configured as inverted isosceles trapezoids, and the bottom widths of both are larger than the diameter of the box girder reinforcement, which is 1.5 times the diameter of the box girder reinforcement in this embodiment.

[0059] Connect multiple second longitudinal angle steels 41 to the top I-beams 13 of the two adjacent main frames 1 through bolts. After the second longitudinal angle steels 41 are arranged on the top I-beams 13, connect multiple second transverse angle steels 42 to the top I-beams 13 through bolts. The multiple second transverse angle steels 42 are arranged along the length direction of the top I-beams 13, thereby completing the installation of the top plate reinforcement positioning assembly 4. After the installation is completed, based on the already positioned box girder bottom and web reinforcement cage, first place multiple transverse reinforcements into the multiple second longitudinal positioning slots 411 respectively. After the transverse reinforcements are arranged, place multiple longitudinal reinforcements into the multiple second transverse positioning slots 421 respectively. After the longitudinal and transverse reinforcements are arranged, they are tied to form a reinforcement mesh, thereby completing the positioning and tying of the box girder top plate reinforcement. Then tie the box girder top plate reinforcement mesh to the box girder bottom and web reinforcement cage to form the overall reinforcement skeleton of the box girder.

[0060] The implementation principle of Example 1 of the present application is as follows: the number of main frames 1 is determined according to the size of the cast-in-situ box girder, and multiple first longitudinal angle steels 21 are connected to the bottom I-beams 11 of the two adjacent main frames 1 by bolts. After the first longitudinal angle steels 21 are arranged on the bottom I-beams 11, multiple first transverse angle steels 22 are connected to the bottom I-beams 11 by bolts. Multiple first transverse angle steels 22 are arranged along the length direction of the bottom I-beams 11, thereby completing the connection of multiple main frames 1 and the installation of the bottom plate steel bar positioning assembly 2. Threaded holes are opened in advance on the reinforcing U-shaped steel 15, and multiple groups of web steel bar positioning assemblies 3 are fixed to the U-shaped steel by fastening bolts 314. Multiple groups of web steel bar positioning assemblies 3 are arranged along the length direction of the U-shaped steel. At this time, the fastening bolts 314 abut against the inner bottom wall of the slide groove 3133 of the adjacent fixing plate 3132, completing the positioning of multiple positioning steel pipes 311. Slide the support rod 321 so that the pull rod 322 slides until it abuts one end of the positioning steel pipe 311, completing the positioning of the support rod 321. Bolt multiple second longitudinal angle steels 41 to the top I-beams 13 of the two adjacent main frames 1. After the second longitudinal angle steels 41 are arranged on the top I-beams 13, bolt multiple second transverse angle steels 42 to the top I-beams 13. Arrange multiple second transverse angle steels 42 along the length direction of the top I-beams 13, thereby completing the installation of the top plate steel bar positioning assembly 4.

[0061] First, multiple transverse steel bars are placed into the multiple first longitudinal positioning slots 213. After the transverse steel bars are arranged, multiple longitudinal steel bars are placed into the multiple first transverse positioning slots 223. After the longitudinal and transverse steel bars are arranged, they are tied together to form a steel mesh, thereby completing the positioning and tying of the box girder bottom plate steel bars. Multiple box girder web longitudinal steel bars are placed on the multiple support rods 321, and then the box girder web longitudinal steel bars are tied together to form a steel mesh. The box girder web steel mesh is tied to the box girder bottom plate steel mesh to form the box girder bottom and web steel cage.

[0062] After the binding is completed, the fastening bolts 314 are loosened, and the positioning steel pipe 311 drives the support rod 321 to slide down along the direction of the slide groove 3133, so that the support rod 321 is separated from the box beam web reinforcement, and the support rod 321 is slid in the direction away from the box beam web reinforcement, so that the support rod 321 is pulled out from the bottom of the box beam and the web reinforcement cage.

[0063] Based on the already positioned box girder bottom and web reinforcement cages, multiple transverse reinforcements are first placed into the multiple second longitudinal positioning slots 411. Once the transverse reinforcement is arranged, multiple longitudinal reinforcements are then placed into the multiple second transverse positioning slots 421. After the longitudinal and transverse reinforcements are arranged, they are tied together to form a reinforcement mesh, thus completing the positioning and tying of the box girder top plate reinforcement. The box girder top plate reinforcement mesh is then tied and connected to the box girder bottom and web reinforcement cages, forming the overall box girder reinforcement skeleton. Finally, the overall box girder reinforcement skeleton is hoisted into the beam formwork for concrete pouring.

[0064] Example 2

[0065] The difference from Example 1 is that, Figure 8 The bottom I-beam 11 includes two auxiliary bottom I-beams 111, which are arranged along their own length directions, and the top ends of the two auxiliary bottom I-beams 111 are inclined away from each other at the abutment point. The four bases 141 are divided into two groups, and each group of bases 141 is respectively arranged under each auxiliary bottom I-beam 111.

[0066] Reference Figure 8 and Figure 9Each base 141 is equipped with a lifting assembly 5, which is used to adjust the slope of the main frame 1 to facilitate setting the cross slope of the box girder. The lifting assembly 5 includes a lifting screw 51. A rotation groove 1411 is coaxially defined on the top surface of the base 141. The bottom end of the lifting screw 51 is coaxially connected to the rotation groove 1411. The two lifting screws 51 located below the same auxiliary bottom I-beam 111 have the same thread direction, while the two sets of lifting screws 51 located below two auxiliary bottom I-beams 111 have opposite thread directions. A rotating sleeve 52 is coaxially sleeved on the lifting screw 51, and the inner wall of the rotating sleeve 52 is threadedly connected to the lifting screw 51. A limiting groove is coaxially provided on the top surface of the base 141, and the limiting groove includes a first limiting groove 1412 and a second limiting groove 1413. The bottom end of the rotating sleeve 52 is rotatably connected to the first limiting groove 1412, and the second limiting groove 1413 is provided on the side wall of the first limiting groove 1412 away from the axis of the rotating sleeve 52, and is circumferentially provided along the first limiting groove 1412. The bottom end of the rotating sleeve 52 is coaxially fixedly connected to the limiting ring 53, and the limiting ring 53 is rotatably connected to the second limiting groove 1413. The top end of the lifting screw 51 passes through the flange plate located at the bottom of the bottom I-beam 11. A clamping groove 511 is provided at the top end of the lifting screw 51. A universal ball 54 is rotatably connected in the clamping groove 511. The shape of the clamping groove 511 is adapted to the shape of the universal ball 54, and the depth of the clamping groove 511 is greater than the radius of the universal ball 54. The top surface of the universal ball 54 abuts the bottom surface of the flange plate located at the top of the bottom I-beam 11.

[0067] Reference Figure 10 An adjustment gear 55 is coaxially fixedly connected to the rotating sleeve 52. A fixed block 57 is fixedly connected between the two flanges of the bottom I-beam 11. The fixed block 57 is located on the side of the web of the adjustment gear 55 facing away from the bottom I-beam 11. The fixed block 57 has a receiving slot 571 on the side facing the adjustment gear 55. The receiving slot 571 is arc-shaped and fits the adjustment gear 55. The adjustment gear 55 is rotatably connected within the receiving slot 571. The length of the fixed block 57 is parallel to the length of the bottom I-beam 11. A guide slot 572 is defined along the length of the fixed block 57, which communicates with the receiving slot 571. An adjustment rack 56 is slidably connected within the guide slot 572 and meshes with the adjustment gear 55. A push rod 58 is fixedly connected to the side of the adjustment rack 56 facing away from the adjustment gear 55. The push rod 58 has a length perpendicular to that of the adjustment rack 56. A sliding groove 573 is defined on the side of the fixed block 57 away from the adjusting gear 55 . The length direction of the sliding groove 573 is parallel to the length direction of the fixed block 57 . The sliding groove 573 is connected to the guide groove 572 . The push rod 58 is slidably connected in the sliding groove 573 .

[0068] Push the push rods 58 on the two middle supports 14 toward each other, and the push rods 58 drive the adjusting rack 56 to slide in the guide groove 572, and the adjusting rack 56 drives the adjusting gear 55 to rotate, and the adjusting gear 55 drives the rotating sleeve 52 to rotate, and the rotating sleeve 52 drives the lifting screw 51 to rise, and the lifting screw 51 drives the two auxiliary bottom I-beams 111 to abut one end and rise, so that the bottom I-beam 11 is in a shape with a high middle and low sides, which is convenient for setting a horizontal slope with a high middle and low sides on the top surface of the box beam.

[0069] Reference Figure 11 and Figure 12 To facilitate determining the slope of the box girder's transverse slope, a distance assembly 6 is provided on the fixed block 57. The distance assembly 6 comprises a plurality of distance rods 61, which are rotatably connected to the side of the fixed block 57 facing away from the adjustment gear 55 and are located above the push rod 58. The plurality of distance rods 61 are arranged at equal intervals along the length of the fixed block 57, and the axial direction of the distance rods 61 is perpendicular to the length of the fixed block 57. A scale line 62 is marked on the fixed block 57 above each distance rod 61, and the scale line 62 is aligned with the axis of the corresponding distance rod 61. A limit sleeve 63 is coaxially sleeved on the distance rod 61. The limit sleeve 63 is made of foam material, and adjacent limit sleeves 63 abut against each other. A positioning sleeve 64 is coaxially sleeved on the push rod 58. Two fixing grooves 581 are opened along the axial direction of the push rod 58 on the side wall of the push rod 58. The two fixing grooves 581 are located at the top and bottom of the push rod 58, respectively, and the two fixing grooves 581 are symmetrically arranged. Two limit blocks 65 are fixedly connected to the inner side wall of the positioning sleeve 64. The two limit blocks 65 are respectively arranged to correspond to the two fixed grooves 581, and the two limit blocks 65 are respectively slidably connected to the two fixed grooves 581. A turning groove 582 is formed at the end of the push rod 58 away from the fixed block 57. The turning groove 582 is arranged along the circumference of the push rod 58 and is connected to the two fixed grooves 581. A positioning block 66 and a limit plate 67 are fixedly connected to the circumferential side wall of the positioning sleeve 64. The positioning block 66 and the limit plate 67 are respectively arranged to correspond to the two limit blocks 65. The shape of the positioning block 66 is adapted to the shape between the two adjacent limit sleeves 63. The positioning block 66 is made of silicone material, and the length direction of the limit plate 67 is perpendicular to the axial direction of the positioning sleeve 64.

[0070] For the two middle supports 14, first rotate the positioning sleeve 64 to the position where the positioning block 66 is on top and the limiting plate 67 is on the bottom. At this time, the limiting block 65 is located in the fixing groove 581, thereby fixing the positioning sleeve 64. According to the required transverse slope of the box beam, determine the distance the push rod 58 needs to push, thereby determining the scale line 62 that the push rod 58 needs to reach. Push the push rod 58. During the sliding process of the push rod 58, the positioning block 66 abuts against the limiting sleeve 63, and the push rod 58 drives the positioning block 66 to slide. When the positioning block 66 slides to between the two limiting sleeves 63 adjacent to the scale value to be reached, the positioning block 66 is clamped between the two limiting sleeves 63, thereby pushing the push rod 58 to the scale line 62 to be reached. Slide the positioning sleeve 64 axially along the limit rod. When it slides until the limit block 65 is located in the steering groove 582, rotate the positioning sleeve 64 until the limit plate 67 is on the top and the positioning block 66 is on the bottom. Then slide the positioning sleeve 64 in the opposite direction along the axial direction of the limit rod until the limit plate 67 is clamped between the two limit sleeves 63, completing the fixation of the push rod 58, thereby completing the fixation of the lifting screw 51, and then completing the adjustment of the inclination slope of the main frame 1.

[0071] The implementation principle of Example 2 of the present application is as follows: for the two middle supports 14, first rotate the positioning sleeve 64 to the position where the positioning block 66 is on top and the limit plate 67 is on the bottom. At this time, the limit block 65 is located in the fixing groove 581, thereby fixing the positioning sleeve 64. According to the transverse slope of the box beam to be set as needed, the distance that the push rod 58 needs to be pushed is determined, thereby determining the scale line 62 that the push rod 58 needs to reach. Push the push rods 58 on the two middle supports 14 in the direction close to each other, and the push rods 58 drive the adjustment rack 56 to slide in the guide groove 572. The adjustment rack 56 drives the adjustment gear 55 to rotate, and the adjustment gear 55 drives the rotating sleeve 52 to rotate. The rotating sleeve 52 drives the lifting screw 51 to rise, and the lifting screw 51 drives the two auxiliary bottom I-beams 111 to rise at one end.

[0072] When the positioning block 66 slides to between the two limit sleeves 63 adjacent to the desired scale value, stop pushing the push rod 58. At this time, the axis of the push rod 58 is aligned with the desired scale line 62. Slide the positioning sleeve 64 along the axial direction of the limit rod. When it slides until the limit block 65 is located in the steering groove 582, rotate the positioning sleeve 64 until the limit plate 67 is on top and the positioning block 66 is on the bottom. Then, slide the positioning sleeve 64 in the opposite direction along the axial direction of the limit rod until the limit plate 67 is engaged between the two limit sleeves 63. This completes the fixation of the push rod 58, thereby completing the fixation of the lifting screw 51 and further completing the adjustment of the inclination slope of the main frame 1.

[0073] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for forming an integral steel frame of a large-span cast-in-situ box girder, characterized by: The invention comprises a plurality of main frames (1), a plurality of bottom plate steel bar positioning assemblies (2), a plurality of web plate steel bar positioning assemblies (3) and a plurality of top plate steel bar positioning assemblies (4), wherein two adjacent main frames (1) are connected via a group of bottom plate steel bar positioning assemblies (2) and two groups of top plate steel bar positioning assemblies (4), wherein the bottom plate steel bar positioning assemblies (2) are located at the bottom of the main frame (1) and are used to position the bottom plate steel bars of the box beam, the web plate steel bar positioning assemblies (3) are located in the middle of the main frame (1) and are used to position the web plate steel bars of the box beam, and the top plate steel bar positioning assemblies (4) are located at the top of the main frame (1) and are used to position the top plate steel bars of the box beam; The main frame (1) comprises a bottom I-steel (11), two belly U-steels (12) and two top I-steels (13); The bottom I-beam (11) comprises two auxiliary bottom I-beams (111), the two auxiliary bottom I-beams (111) being arranged along their own length direction, two bases (141) being provided below the two auxiliary bottom I-beams (111), the two bases (141) being arranged along the length direction of the bottom I-beam (11), and a lifting assembly (5) being provided on the bases (141), the lifting assembly (5) being used to adjust the inclination of the auxiliary bottom I-beam (111); The lifting assembly (5) includes a lifting screw (51) and a rotating sleeve (52), wherein the rotating sleeve (52) is rotatably connected to the top surface of the base (141), the lifting screw (51) is coaxially arranged in the rotating sleeve (52) and is threadedly connected to the rotating sleeve (52), and the top surface of the lifting screw (51) is rotatably connected to a universal ball (54), and the universal ball (54) abuts against the bottom I-beam (11); An adjusting gear (55) is coaxially fixedly connected to the rotating sleeve (52), a fixed block (57) is provided on the bottom I-beam (11), an adjusting rack (56) is slidably connected in the fixed block (57), the adjusting rack (56) is meshed with the adjusting gear (55), a push rod (58) is fixedly connected to the adjusting rack (56), and the push rod (58) is slidably connected in the fixed block (57); The fixed block (57) is rotatably connected to a plurality of distance rods (61), and the plurality of distance rods (61) are arranged at equal intervals along the length direction of the bottom I-beam (11). A corresponding scale line (62) is marked on the fixed block (57) below each of the distance rods (61). The scale line (62) is used to determine the sliding distance of the push rod (58). The push rod (58) is provided with a positioning block (66), and the positioning block (66) is used to be clamped between two adjacent push rods (58).

2. The device for forming an integral steel reinforcement skeleton of a large-span cast-in-situ box beam according to claim 1, characterized in that: The two web U-shaped steels (12) are welded to the bottom I-shaped steel (11), the two top I-shaped steels (13) are respectively arranged on the two web U-shaped steels (12), the bottom plate steel bar positioning assembly (2) is arranged between the bottom I-shaped steels (11) of two adjacent main frames (1), the top plate steel bar positioning assembly (4) is arranged between two adjacent top I-shaped steels (13) of the two main frames (1), and multiple groups of the web steel bar positioning assemblies (3) are all arranged on the web U-shaped steel (12) and are arranged along the length direction of the web U-shaped steel (12).

3. The device for forming an integral steel reinforcement skeleton for a large-span cast-in-situ box girder according to claim 2, characterized in that: The web reinforcement positioning assembly (3) comprises a plurality of positioning steel pipes (311), wherein the plurality of positioning steel pipes (311) are connected via a connecting rod (312), the positioning steel pipes (311) are arranged on the belly U-shaped steel (12), a support rod (321) is slidably connected in the positioning steel pipe (311), and the plurality of support rods (321) are connected via a pull rod (322).

4. The device for forming an integral steel reinforcement skeleton for a large-span cast-in-situ box girder according to claim 3, characterized in that: The main frame (1) further comprises a reinforcing U-shaped steel (15), wherein the reinforcing U-shaped steel (15) is vertically arranged and fixedly connected to the bottom I-shaped steel (11), the top end of the reinforcing U-shaped steel (15) is fixedly connected to the top end of the belly U-shaped steel (12), and a fixing sleeve (313) is coaxially welded on the two positioning steel pipes (311) at the top and bottom, and the fixing sleeve (313) is connected to the reinforcing U-shaped steel (15) by a fastening bolt (314).

5. The device for forming an integral steel reinforcement skeleton for a large-span cast-in-situ box beam according to claim 4, characterized in that: The fixing sleeve (313) comprises a fixing half ring (3131) and two fixing plates (3132). The two fixing plates (3132) are fixedly connected to the two ends of the fixing half ring (3131), respectively. The fixing half ring (3131) is coaxially welded to the positioning steel pipe (311). A sliding groove (3133) is vertically opened on the fixing plate (3132). The fastening bolt (314) passes through the sliding groove (3133). The width of the sliding groove (3133) is greater than the diameter of the fastening bolt (314).

6. The device for forming an integral steel reinforcement skeleton for a large-span cast-in-situ box girder according to claim 2, characterized in that: The bottom plate reinforcement positioning assembly (2) comprises a plurality of first longitudinal angle steels (21) and a plurality of first transverse angle steels (22), wherein the plurality of first longitudinal angle steels (21) are connected between the bottom I-beams (11) of two adjacent main frames (1) by bolts, and the length direction of the first longitudinal angle steels (21) is perpendicular to the length direction of the bottom I-beam (11), and the plurality of first transverse angle steels (22) are connected to the top surface of the bottom I-beam (11) by bolts, and the length direction of the first transverse angle steels (22) is parallel to the length direction of the bottom I-beam (11), the first longitudinal angle steel (21) is provided with a plurality of first longitudinal positioning slots (213) for positioning the transverse reinforcement, and the first transverse angle steel (22) is provided with a plurality of first transverse positioning slots (223) for positioning the longitudinal reinforcement.

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