Prefabricated box girder reinforcement cage considering girder end variable cross-section mesh division

Abstract

The utility model discloses a prefabricated box girder steel reinforcement framework considering girder end variable cross-section mesh division, which comprises a U-shaped steel reinforcement mesh, a bottom plate steel reinforcement mesh is arranged at the upper end of the lower part of the U-shaped steel reinforcement mesh, a web steel reinforcement mesh is arranged in the side wall of the U-shaped steel reinforcement mesh, and a top plate steel reinforcement mesh is arranged at the top of the U-shaped steel reinforcement mesh. The two sides of the top plate reinforcing mesh extend outwards to form cantilever reinforcing meshes. According to the U-shaped reinforcing mesh, one-time machining of equipment can be achieved, and the U-shaped reinforcing mesh can be integrally bent according to the arc chamfer after being machined. According to the utility model, the midspan standard section and the beam end reinforcing mesh are integrally formed for the first time, so that automatic splicing and assembling are facilitated, the framework forming efficiency is improved, and the integral rigidity and stability of the framework are improved. The forming standardization degree of the mesh type steel reinforcement framework is high, intelligent control over the machine is easy to achieve, the field supervision difficulty is lowered, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of intelligent construction of bridge engineering, and specifically relates to a prefabricated box beam reinforcement skeleton taking into account the division of variable-section meshes at beam ends. Background Art

[0002] As an important part of railway bridge engineering, the production quality and efficiency of prefabricated box girders directly determine the construction quality and progress of bridge engineering. The steel frame forming is the most important link in the box girder prefabrication process, which is mainly divided into a series of processes such as steel bar processing, transportation, laying and binding.

[0003] At present, almost all prefabricated beam sites use manual operations to form steel skeletons, which requires a lot of manpower and material resources, and the quality and efficiency of skeleton binding are difficult to guarantee. Relevant institutions have carried out intelligent construction of steel skeletons for standard sections in the mid-span of box beams, which has improved the quality and efficiency of steel skeleton construction to a certain extent.

[0004] In recent years, my country's bridge technology has developed unprecedentedly, which has put forward higher requirements on the number of workers in prefabricated beam yards, labor intensity, and the construction quality and efficiency of box beams. The traditional steel frame construction relying on manual labor has gradually become difficult to adapt to the current development needs. Summary of the invention

[0005] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a prefabricated box beam reinforcement skeleton taking into account the division of the variable-section mesh at the beam end.

[0006] The technical solution of the utility model is: a prefabricated box girder steel frame that takes into account the variable-section mesh division at the beam end, including a U-shaped steel mesh as a contour basis, a bottom plate steel mesh is arranged at the upper end of the lower part of the U-shaped steel mesh, a web steel mesh is arranged inside the side wall of the U-shaped steel mesh, a top plate steel mesh is arranged on the top of the U-shaped steel mesh, and cantilever steel meshes are formed on both sides of the top plate steel mesh.

[0007] Furthermore, the bottom plate steel mesh includes a bottom plate top steel mesh and a beam end bottom plate top steel mesh, the bottom plate top steel mesh is arranged in the standard section of the beam body, the beam end bottom plate top steel mesh is arranged in the beam end of the beam body, and the bottom plate top steel mesh and the beam end bottom plate top steel mesh are inclined in transition.

[0008] Furthermore, the web steel mesh includes an inner web steel mesh and an inner web steel mesh at the beam end. The inner web steel mesh is arranged in the standard section of the beam body, and the inner web steel mesh at the beam end is arranged in the beam end of the beam body. The inner web steel mesh and the inner web steel mesh at the beam end are inclined in transition.

[0009] Furthermore, the web steel mesh includes an upper inner web steel mesh and an upper inner web steel mesh at the beam end, the upper inner web steel mesh is arranged in the standard section of the beam body, the upper inner web steel mesh at the beam end is arranged in the beam end of the beam body, and the upper inner web steel mesh and the upper inner web steel mesh at the beam end are inclinedly transitioned.

[0010] Furthermore, the top plate steel mesh includes a top plate top steel mesh, the top plate top steel mesh constitutes the upper contour of the beam body, and the top plate top steel mesh is arranged in the standard section and the mid-plane of the beam end.

[0011] Furthermore, the top plate steel mesh includes a top plate bottom steel mesh and a beam end top plate bottom steel mesh, the top plate bottom steel mesh is arranged in the standard section of the beam body, the beam end top plate bottom steel mesh is arranged in the beam end of the beam body, and the top plate bottom steel mesh and the beam end top plate bottom steel mesh are inclined in transition.

[0012] Furthermore, the cantilever steel mesh comprises a cantilever steel mesh at the bottom of the top plate and a cantilever steel mesh at the top of the top plate, and one end of the cantilever steel mesh at the bottom of the top plate and the cantilever steel mesh at the top of the top plate are cross-fixed at an acute angle.

[0013] Furthermore, the top cantilever steel mesh of the top plate is connected to the top steel mesh of the top plate.

[0014] Furthermore, the top plate bottom cantilever steel mesh is connected to the U-shaped steel mesh.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model innovates the prefabricated beam steel bar skeleton forming process from the design source, realizes the automatic forming of the steel bar skeleton, greatly reduces the labor intensity of workers, and saves human resources.

[0017] The U-shaped steel bar mesh of the utility model can be processed by the equipment in one step, and can be bent as a whole according to the circular arc chamfer after the processing is completed.

[0018] The utility model proposes for the first time the integrated forming of the standard mid-span section and the beam end steel mesh, which is convenient for automated splicing and assembly, improves the efficiency of skeleton forming, and increases the overall rigidity and stability of the skeleton.

[0019] The utility model realizes mechanized and automatic production of steel mesh forming and steel frame assembly, avoids human error, and improves steel bar positioning accuracy and steel frame quality.

[0020] The mesh-type steel bar skeleton of the utility model has a high degree of standardization in forming, is easy to realize intelligent control of the machine, reduces the difficulty of on-site supervision, and improves production efficiency.

[0021] The mesh-type steel bar skeleton concept of the utility model can be applied to single-line and double-line 24m, 32m, and 40m prefabricated box girders of railways, as well as other prefabricated box girder structures such as highways and urban rails, and has strong reusability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional schematic diagram of a standard section in the utility model;

[0023] Figure 2 It is a cross-sectional schematic diagram of the beam end of the utility model;

[0024] Figure 3 It is a longitudinal section schematic diagram of the utility model;

[0025] Figure 4 It is a schematic diagram of a plan section of the utility model;

[0026] in:

[0027] A1, U-shaped steel mesh; A2, top steel mesh of bottom plate; A2', top steel mesh of bottom plate at beam end; A3, inclined steel mesh of bottom plate stem; A4, inner steel mesh of web; A4', inner steel mesh of web at beam end; A5, upper inner steel mesh of web; A5', upper inner steel mesh of web at beam end; A6, cantilever steel mesh at bottom of top plate; A7, bottom steel mesh of top plate; A7', bottom steel mesh of top plate at beam end; A8, top steel mesh of top plate; A9, cantilever steel mesh at top plate. DETAILED DESCRIPTION

[0028] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0029] like Figures 1 to 4 As shown, a prefabricated box girder reinforcement skeleton taking into account the variable-section mesh division at the beam end comprises a U-shaped steel mesh A1 as a contour basis, a bottom plate steel mesh is arranged at the upper end of the lower part of the U-shaped steel mesh A1, a web steel mesh is arranged inside the side wall of the U-shaped steel mesh A1, a top plate steel mesh is arranged on the top of the U-shaped steel mesh A1, and cantilever steel meshes are formed on both sides of the top plate steel mesh.

[0030] The bottom plate steel mesh includes a bottom plate top steel mesh A2 and a beam end bottom plate top steel mesh A2'. The bottom plate top steel mesh A2 is arranged in the standard section of the beam body, and the beam end bottom plate top steel mesh A2' is arranged in the beam end of the beam body. The bottom plate top steel mesh A2 and the beam end bottom plate top steel mesh A2' are inclined in transition.

[0031] The web steel mesh includes an inner web steel mesh A4 and an inner web steel mesh A4' at the end of the beam. The inner web steel mesh A4 is arranged in the standard section of the beam body, and the inner web steel mesh A4' at the end of the beam is arranged in the beam end of the beam body. The inner web steel mesh A4 and the inner web steel mesh A4' at the end of the beam are inclinedly transitioned.

[0032] The web steel mesh includes an upper steel mesh A5 inside the web and an upper steel mesh A5' inside the web at the beam end. The upper steel mesh A5 inside the web is arranged in the standard section of the beam body, and the upper steel mesh A5' inside the web at the beam end is arranged in the beam end of the beam body. The upper steel mesh A5 inside the web and the upper steel mesh A5' inside the web at the beam end are inclinedly transitioned.

[0033] The top plate steel mesh comprises a top plate top steel mesh A8, which constitutes the upper contour of the beam body. The top plate top steel mesh A8 is arranged in the standard section and the mid-plane of the beam end.

[0034] The top plate steel mesh includes a top plate bottom steel mesh A7 and a beam end top plate bottom steel mesh A7'. The top plate bottom steel mesh A7 is arranged in the standard section of the beam body, and the beam end top plate bottom steel mesh A7' is arranged in the beam end of the beam body. The top plate bottom steel mesh A7 and the beam end top plate bottom steel mesh A7' are inclined in transition.

[0035] The cantilever steel mesh comprises a cantilever steel mesh A6 at the bottom of the top plate and a cantilever steel mesh A9 at the top of the top plate. One end of the cantilever steel mesh A6 at the bottom of the top plate and the cantilever steel mesh A9 at the top of the top plate are cross-fixed in an acute angle.

[0036] The top plate cantilever steel mesh A9 is connected to the top plate top steel mesh A8.

[0037] The top plate bottom cantilever steel mesh A6 is connected to the U-shaped steel mesh A1.

[0038] Specifically, the bottom plate top steel mesh A2, the web inner steel mesh A4, the web inner upper steel mesh A5, and the top plate bottom steel mesh A7 constitute a standard section internal mesh unit.

[0039] Specifically, the top steel mesh A2' of the bottom plate of the beam end, the inner steel mesh A4' of the web of the beam end, the upper inner steel mesh A5' of the web of the beam end, and the bottom steel mesh A7' of the top plate of the beam end constitute the internal mesh unit of the beam end.

[0040] The enclosed space of the mesh unit inside the beam end is smaller than the enclosed space of the mesh unit inside the standard section.

[0041] Specifically, the upper end of the U-shaped steel mesh A1 is connected to the top steel mesh A8 of the top plate; the U-shaped steel mesh A1 is connected to the bottom steel mesh A7 of the top plate and the end of the bottom steel mesh A7' of the top plate at the beam end; the U-shaped steel mesh A1 is cross-connected with the cantilever steel mesh A6 at the bottom of the top plate; the bottom of the U-shaped steel mesh A1 is connected to the web steel mesh A4, the web steel mesh A4' at the beam end and the bottom plate stem inclined steel mesh A3.

[0042] Specifically, the outer side of the end of the top plate top steel mesh A8 is connected to the top plate top cantilever steel mesh A9, and the other end of the top plate top cantilever steel mesh A9 is connected to the top plate bottom cantilever steel mesh A6.

[0043] Specifically, the top plate bottom cantilever steel mesh A6 is cross-connected with the U-shaped steel mesh A1, the web inner steel mesh A4, the beam end web inner steel mesh A4', the web upper steel mesh A5, and the beam end web upper steel mesh A5', and the other end of the plate bottom cantilever steel mesh A6 is connected to the top plate bottom steel mesh A7 and the beam end top plate bottom steel mesh A7'.

[0044] Specifically, the top plate bottom steel mesh A7 and the beam end top plate bottom steel mesh A7' are cross-connected with the U-shaped steel mesh A1, the web inner steel mesh A4, the beam end web inner steel mesh A4', the web inner upper steel mesh A5, the beam end web inner upper steel mesh A5', and the top plate bottom cantilever steel mesh A6 respectively.

[0045] Specifically, the upper ends of the upper steel mesh A5 in the web and the upper steel mesh A5 in the web at the end of the beam are connected to the top plate bottom steel mesh A7 and the top plate bottom steel mesh A7' at the end of the beam, the lower ends of the steel mesh A4 in the web and the steel mesh A4' in the web at the end of the beam are connected to the top steel mesh A2 of the bottom plate and the top steel mesh A2' of the bottom plate at the end of the beam, the upper steel mesh A5 in the web and the upper steel mesh A5 in the web at the end of the beam are cross-connected with the bottom cantilever steel mesh A6 of the top plate, and the steel mesh A4 in the web and the steel mesh A4' in the web at the end of the beam are cross-connected with the oblique steel mesh A3 of the bottom plate.

[0046] Specifically, the ends of the bottom plate top steel mesh A2 and the beam end bottom plate top steel mesh A2' are connected to the web inner steel mesh A4 and the beam end web inner steel mesh A4', and at the same time, the bottom plate top steel mesh A2 and the beam end bottom plate top steel mesh A2' are cross-connected with the bottom plate stem oblique steel mesh A3.

[0047] The bottom plate oblique steel mesh A3 is cross-connected with the web inner steel mesh A4, the beam end web inner steel mesh A4' and the bottom plate top steel mesh A2, and the beam end bottom plate top steel mesh A2'.

[0048] Specifically, the steel mesh is formed as a whole by longitudinal steel bars and transverse steel bars arranged and connected at fixed intervals.

[0049] Specifically, the connection method of the longitudinal steel bars and the transverse steel bars is one of resistance welding connection, arc welding connection, binding connection, and steel-glue bonding connection.

[0050] Specifically, the U-shaped steel mesh A1, the top plate bottom cantilever steel mesh A6, the top plate top steel mesh A8, and the top plate top cantilever steel mesh A9 are full-length steel meshes for the entire beam.

[0051] The above-mentioned arrangement can realize the integrated assembly of the standard mid-span section and the beam end steel mesh, thereby improving the integrity of the steel skeleton and avoiding problems such as cumbersome assembly and cross-collision at the junction of the two.

[0052] The standard longitudinal and transverse steel bars used for the individual forming of the above-mentioned steel mesh are produced and processed by CNC steel bar equipment, and special material collection and transfer equipment is used to form standard stacking.

[0053] The above-mentioned arrangement can realize the automated grabbing and loading of steel mesh processing, and improve the production efficiency of steel mesh products.

[0054] The bottom plate U-shaped steel mesh A1 has uniform specifications for the arc chamfers.

[0055] The above settings can not only meet the requirements of railway specifications and standards, but also facilitate the automatic processing of the machinery.

[0056] The top steel mesh A2' of the bottom plate at the beam end, the inner steel mesh A4' of the web at the beam end, the bottom steel mesh A7' of the top plate at the beam end, and the upper steel mesh A5' of the web at the beam end need to be bent at a certain angle along the longitudinal direction of the box beam.

[0057] The above arrangement can coordinate the deformation of the inner steel bars of the steel bar skeleton at the beam end with the gradual change at the beam end, thereby improving the forming accuracy of the steel bar skeleton.

[0058] More specifically, the mesh with small longitudinal and transverse angle bends can be automatically processed by mechanical equipment.

[0059] More specifically, the disassembled mesh can be assembled on the assembly jig with the help of an automated sling without interfering with each other.

[0060] More specifically, a steel belt mesh is formed by laying ordinary steel bars and flexible steel belts arranged and connected at a fixed interval on the top steel mesh A7 of the top plate. The two are connected and fixed, which can improve the forming efficiency and stability of the steel skeleton.

[0061] The method for forming a prefabricated box beam reinforcement skeleton considering the division of the beam end variable cross-section mesh comprises the following steps:

[0062] A. Cutting longitudinal and transverse steel bars

[0063] A certain length of longitudinal steel bars and transverse steel bars are cut according to the design size, and the quantity of the longitudinal steel bars and transverse steel bars is obtained according to the design requirements.

[0064] B. Connect the longitudinal and transverse steel bars to form each mesh unit

[0065] Arrange the longitudinal and transverse steel bars at fixed intervals, and fix and connect the arranged steel bars to form each mesh unit.

[0066] C. Lay U-shaped steel mesh A1 on the skeleton support frame

[0067] Lay the bottom plate U-shaped steel mesh A1 on the skeleton support frame, and ensure that the U-shaped steel mesh A1 fits the assembly jig.

[0068] D. Lay the bottom plate top steel mesh A2, beam end bottom plate top steel mesh A2'

[0069] First, lay the bottom slab top steel mesh A2 at the bottom slab design position of the standard section;

[0070] Then, lay the top steel mesh A2' of the bottom plate of the beam end at the designed position of the bottom plate of the beam end.

[0071] E. Insert and connect the bottom plate oblique steel mesh A3 in the left and right spans

[0072] First, according to the design angle, insert the bottom plate stem oblique steel mesh A3 in the left and right spans into the U-shaped steel mesh A1 and the bottom plate top steel mesh A2;

[0073] Then, the bottom plate stem oblique steel mesh A3 is connected and fixed with the U-shaped steel mesh A1 and the bottom plate top steel mesh A2.

[0074] F. Insert and connect the steel mesh A4 inside the webs on the inside of the left and right webs

[0075] First, insert the web inner steel mesh A4 on the inner side of the left and right webs into the bottom plate stem oblique steel mesh A3, the bottom plate top steel mesh A2, and the U-shaped steel mesh A1 at the designed positions respectively;

[0076] Then, the web inner steel mesh A4 is connected and fixed with the bottom plate stem oblique steel mesh A3, the bottom plate top steel mesh A2, and the U-shaped steel mesh A1.

[0077] G. Insert and connect the steel mesh A4' on the inner side of the left and right webs at the beam end

[0078] First, insert the inner steel mesh A4' of the beam end web on the inner side of the left and right webs of the beam end into the bottom plate stem inclined steel mesh A3, the top steel mesh A2' of the beam end bottom plate, and the U-shaped steel mesh A1 at the designed position;

[0079] Then, the inner side steel mesh A4' of the web is connected and fixed with the inclined steel mesh A3 of the bottom plate stem, the top steel mesh A2' of the bottom plate at the beam end, and the U-shaped steel mesh A1.

[0080] H. Insert and connect the upper steel mesh A5 in the left and right webs

[0081] First, insert the upper web inner steel mesh A5 in the left and right webs into the web inner steel mesh A4 according to the design angles respectively;

[0082] Then, the upper steel mesh A5 inside the web and the steel mesh A4 inside the web are connected and fixed.

[0083] I. Insert and connect the upper steel mesh A5' on the inner side of the left and right webs of the beam end

[0084] First, insert the upper steel mesh A5' in the web of the left and right beam ends into the steel mesh A4' in the web of the beam ends according to the design angles;

[0085] Then, the upper steel mesh A5' in the web of the beam end and the steel mesh A4' in the web of the beam end are connected and fixed.

[0086] J. Place and connect the top plate bottom cantilever steel mesh A6

[0087] First, place the left and right top plate bottom cantilever steel mesh A6 at the designed position of the support frame;

[0088] Then, the top plate bottom cantilever steel mesh A6 is connected and fixed to the U-shaped steel mesh A1, the web inner steel mesh A4, and the web inner upper steel mesh A5.

[0089] K. Lay the steel belt mesh on the top plate bottom frame support frame.

[0090] L. Lay and connect the top plate bottom steel mesh A7

[0091] The top plate bottom steel mesh A7 is laid on the top plate bottom steel belt net according to the designed position and connected and fixed.

[0092] M. Lay steel mesh on the bottom frame support frame of the top plate at the beam end.

[0093] N. Lay and connect the steel mesh at the bottom of the top plate at the beam end A7'

[0094] Lay the steel mesh A7' at the bottom of the beam end top plate on the steel belt net at the bottom of the beam end top plate according to the designed position and connect and fix it.

[0095] O. Place and connect the top steel mesh A8

[0096] First, place the top plate top steel mesh A8 on the top plate top frame support;

[0097] Then, the top steel mesh A8 of the top plate is connected and fixed with the U-shaped steel mesh A1, the inner steel mesh A4 of the web, and the upper inner steel mesh A5 of the web.

[0098] P. Lay and secure the steel strip mesh above the top steel mesh A8 of the top plate.

[0099] Q. Place and fix the top cantilever steel mesh A9

[0100] First, place the left and right top plate cantilever steel mesh A9 at the designed position respectively;

[0101] Then, one end of the top plate cantilever steel mesh A9 is connected and fixed to the top plate top steel mesh A8;

[0102] Afterwards, the other end of the top plate cantilever steel mesh A9 is fitted and fixed to the top plate bottom cantilever steel mesh A6. Thus, a steel prefabricated box girder steel skeleton is formed considering the variable cross-section mesh division of the beam end.

[0103] Specifically, the steel belt mesh is formed by connecting ordinary steel bars and flexible steel belts arranged at a fixed interval, and is fixedly connected to the top steel bars of the top plate to improve the forming efficiency of the steel skeleton.

[0104] The utility model innovates the prefabricated beam steel bar skeleton forming process from the design source, realizes the automatic forming of the steel bar skeleton, greatly reduces the labor intensity of workers, and saves human resources.

[0105] The U-shaped steel bar mesh of the utility model can be processed by the equipment in one step, and can be bent as a whole according to the circular arc chamfer after the processing is completed.

[0106] The utility model proposes for the first time the integrated forming of the standard mid-span section and the beam end steel mesh, which is convenient for automated splicing and assembly, improves the efficiency of skeleton forming, and increases the overall rigidity and stability of the skeleton.

[0107] The utility model realizes mechanized and automatic production of steel mesh forming and steel frame assembly, avoids human error, and improves steel bar positioning accuracy and steel frame quality.

[0108] The mesh-type steel bar skeleton of the utility model has a high degree of standardization in forming, is easy to realize intelligent control of the machine, reduces the difficulty of on-site supervision, and improves production efficiency.

[0109] The mesh-type steel bar skeleton concept of the utility model can be applied to single-line and double-line 24m, 32m, and 40m prefabricated box girders of railways, as well as other prefabricated box girder structures such as highways and urban rails, and has strong reusability.

Claims

1. A prefabricated box girder reinforcement skeleton considering the division of the variable cross-section mesh at the beam end, comprising a U-shaped reinforcement mesh (A1) as a contour basis, characterized in that: A bottom plate steel mesh is arranged at the upper end of the lower part of the U-shaped steel mesh (A1), a web steel mesh is arranged inside the side wall of the U-shaped steel mesh (A1), a top plate steel mesh is arranged on the top of the U-shaped steel mesh (A1), and both sides of the top plate steel mesh extend outward to form a cantilever steel mesh; The bottom plate steel mesh comprises a bottom plate top steel mesh (A2) and a beam end bottom plate top steel mesh (A2'). The bottom plate top steel mesh (A2) is arranged in a standard section of the beam body, and the beam end bottom plate top steel mesh (A2') is arranged in the beam end of the beam body. The bottom plate top steel mesh (A2) and the beam end bottom plate top steel mesh (A2') are inclined in transition.

2. A prefabricated box beam reinforcement skeleton considering the division of beam end variable cross-section mesh according to claim 1, characterized in that: The web steel mesh comprises an inner web steel mesh (A4) and an inner web steel mesh (A4') at the beam end. The inner web steel mesh (A4) is arranged in a standard section of the beam body, and the inner web steel mesh (A4') at the beam end is arranged in the beam end of the beam body. The inner web steel mesh (A4) and the inner web steel mesh (A4') at the beam end are inclinedly transitioned.

3. The prefabricated box beam reinforcement skeleton according to claim 1, characterized in that: The web steel mesh comprises an upper steel mesh inside the web (A5) and an upper steel mesh inside the web at the beam end (A5'); the upper steel mesh inside the web (A5) is arranged in the standard section of the beam body, and the upper steel mesh inside the web at the beam end (A5') is arranged in the beam end of the beam body; the upper steel mesh inside the web (A5) and the upper steel mesh inside the web at the beam end (A5') are inclinedly transitioned.

4. The prefabricated box beam reinforcement skeleton according to claim 1, characterized in that: The top plate steel mesh comprises a top plate top steel mesh (A8), the top plate top steel mesh (A8) constitutes the upper contour of the beam body, and the top plate top steel mesh (A8) is arranged in the standard section and the mid-plane of the beam end.

5. The prefabricated box beam reinforcement skeleton according to claim 1, characterized in that: The top plate steel mesh comprises a top plate bottom steel mesh (A7) and a beam end top plate bottom steel mesh (A7'). The top plate bottom steel mesh (A7) is arranged in a standard section of the beam body, and the beam end top plate bottom steel mesh (A7') is arranged in the beam end of the beam body. The top plate bottom steel mesh (A7) and the beam end top plate bottom steel mesh (A7') are inclined in transition.

6. The prefabricated box beam reinforcement skeleton according to claim 1, characterized in that: The cantilever steel mesh comprises a cantilever steel mesh at the bottom of the top plate (A6) and a cantilever steel mesh at the top of the top plate (A9), and one end of the cantilever steel mesh at the bottom of the top plate (A6) and the cantilever steel mesh at the top of the top plate (A9) are cross-fixed in an acute angle.

7. A prefabricated box beam reinforcement skeleton considering the division of beam end variable cross-section mesh according to claim 6, characterized in that: The top plate top cantilever steel mesh sheet (A9) is connected to the top plate top steel mesh sheet (A8).

8. The prefabricated box beam reinforcement skeleton according to claim 7, characterized in that: The top plate bottom cantilever steel mesh (A6) is connected to the U-shaped steel mesh (A1).

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