A BIM-based Optimization Method and Application for the Steel Bars of Prefabricated Beams of High-Speed Railways

Abstract

The present invention belongs to the technical field of bridge construction, and discloses a method and application for optimizing the reinforcement of precast beams for high-speed railways based on BIM, including: optimizing the reinforcement form based on BIM, and performing reinforcement optimization by merging or splitting reinforcements, canceling or reducing reinforcement hooks, changing the shape of reinforcement hooks, changing the shape of reinforcements, changing the form of positioning reinforcement meshes, adjusting the length of reinforcements, and rotating reinforcements. By merging or splitting reinforcements, canceling or reducing reinforcement hooks, changing the shape of reinforcement hooks, changing the shape of reinforcements, changing the form of positioning reinforcement meshes, adjusting the length of reinforcements, and rotating reinforcements, the present invention facilitates the binding or welding of reinforcement cages, is applicable to the intelligent construction of reinforcements, and improves work efficiency and work quality. By changing the form of the positioning reinforcement mesh, the present invention obtains a positioning mesh with good integrity and serves as the connecting reinforcement between the upper / lower and inner / outer two-layer reinforcement meshes, saving materials while facilitating construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and particularly relates to a method for optimizing the steel bars of precast beams for high-speed railways based on BIM and its application. Background Art

[0002] At present, China's high-speed railways adopt the mode of using bridges instead of roads, and precast simply supported beams are mainly used for bridges, which results in a particularly large number of precast beams for high-speed railways, and it is of great significance to optimize their steel bars.

[0003] At present, the steel bars of precast beams for high-speed railways are all designed in two dimensions and drawn manually. In addition to steel bars in the precast beam, there are also various structures such as prestressed steel bundles, bearing and anti-drop beam embedded parts, ventilation openings, drain holes, catenary foundation embedded parts, and embedded steel bars for protective walls and vertical walls. At present, there are often interferences between the steel bar arrangements and the above-mentioned various components. At the same time, some steel bars of the precast beam also have problems such as complex structure, difficult binding, and excessive hook.

[0004] Through the above analysis, the problems and defects existing in the prior art are: the existing steel bar treatment method has a cumbersome treatment process, and the treated steel bars have problems such as conflicts with other components, complex structure, difficult binding, and excessive hook.

[0005] The difficulty in solving the above problems and defects is: there are many types of steel bars in the beam body, prestressed steel bundles, and various embedded parts, all of which are three-dimensional spatial structures and change continuously with the change of the beam body section, and it is extremely easy to have problems such as interference and collision. In addition, although some ordinary steel bars do not interfere with other components, they are in a narrow space and cannot be implemented on site. The above problems are difficult or completely impossible to be found in the two-dimensional drawing design, resulting in difficult on-site construction and low efficiency.

[0006] The significance of solving the above problems and defects is: adopting the method of full three-dimensional analysis, not only analyzing the interference problems between steel bars and other components, but also simulating the steel bar construction process and construction sequence, considering the steel bar installation steps in advance, and solving problems such as steel bar interference, collision, and inability to install, which can greatly improve the construction efficiency. Summary of the Invention

[0007] In order to overcome the problems existing in the related technologies, the disclosed embodiments of the present invention provide a method for optimizing the steel bars of precast beams for high-speed railways based on BIM. The technical solution is as follows:

[0008] Simulate the steel bar construction process and construction sequence, optimize the steel bar form based on BIM, and perform steel bar optimization treatment by merging or splitting steel bars, canceling or reducing steel bar hooks, changing the steel bar hook shape, changing the steel bar shape, changing the form of the positioning steel bar mesh, adjusting the steel bar length, and rotating the steel bar.

[0009] In one embodiment, the changing of the shape of the steel bars includes: straightening the bent steel bars at a small angle on the premise of meeting the usage requirements; the small angle is 1-10°.

[0010] In one embodiment, the changing of the form of the positioning steel bar mesh includes: connecting the steel bars of the bottom plate and web positioning meshes into a whole; moving the transverse full-length steel bars of the bottom plate positioning steel bars up by 10-200 mm and adding transverse short steel bars; and lengthening the transverse steel bars of the web positioning mesh.

[0011] In one embodiment, the rotating of the steel bars includes: rotating the steel bars by 10-270° around the axis of the steel bars themselves.

[0012] In one embodiment, the BIM-based optimization method for the steel bars of high-speed railway precast beams includes:

[0013] Obtaining a BIM model of a high-speed railway precast beam including the steel bars of the high-speed railway precast beam and each component of the high-speed railway precast beam;

[0014] Based on the BIM model of the high-speed railway precast beam, determining the application scenarios and types of the steel bars of the high-speed railway precast beam, and respectively performing optimization processing on the steel bars of the high-speed railway precast beam based on the determined application scenarios and types of the steel bars of the high-speed railway precast beam.

[0015] In one embodiment, the respectively performing optimization processing on the steel bars of the high-speed railway precast beam based on the determined application scenarios of the steel bars of the high-speed railway precast beam includes:

[0016] When it is difficult to manufacture the steel bars and form the steel bar cage by binding / welding, optimizing the steel bars of the high-speed railway precast beam by splitting, canceling or reducing the steel bar bends;

[0017] When the construction is difficult, optimizing the steel bars of the high-speed railway precast beam by changing the shape of the steel bars and straightening the bent steel bars at a small angle on the premise of meeting the usage requirements;

[0018] When the space requirements of the steel bar bends cannot be met, optimizing the steel bars of the high-speed railway precast beam by changing the angles of the steel bar bends;

[0019] When there is interference between the steel bars in the box girder and the prestressed steel tendons, optimizing the steel bars of the high-speed railway precast beam by adjusting the lengths of the steel bars;

[0020] When there is interference between the steel bars in the box girder and other embedded components, optimizing the steel bars of the high-speed railway precast beam by rotating the steel bars.

[0021] In one embodiment, the respectively performing optimization processing on the steel bars of the high-speed railway precast beam based on the determined types of the steel bars of the high-speed railway precast beam includes:

[0022] For steel bars with complex shapes and difficult manufacturing or tying, perform steel bar splitting treatment.

[0023] Another object of the present invention is to provide an application of the above-mentioned BIM-based steel bar optimization treatment method for high-speed railway precast beams in high-speed railway construction.

[0024] Another object of the present invention is to provide an application of the above-mentioned BIM-based steel bar optimization treatment method for high-speed railway precast beams in the construction of simply supported beams of high-speed railways.

[0025] Another object of the present invention is to provide a steel bar intelligent construction method for implementing the above-mentioned BIM-based steel bar optimization treatment method for high-speed railway precast beams.

[0026] Combining all the above technical solutions, the advantages and positive effects possessed by the present invention are as follows:

[0027] The method of the present invention is aimed at the common steel bars of simply supported beams of high-speed railways. Using BIM technology to optimize the steel bar forms, by means of merging or splitting steel bars, canceling or reducing steel bar bends, changing the shapes of steel bar bends, changing the shapes of steel bars, changing the forms of positioning steel bar nets, adjusting the lengths of steel bars, rotating steel bars, etc., it is convenient for the tying or welding of steel bar cages, applicable to the intelligent construction of steel bars, and improves work efficiency and work quality.

[0028] The present invention optimizes the form of the positioning net steel bars of prestressed steel tendons, connects the bottom plate and web positioning net steel bars into a whole; and moves up the transverse full-length steel bars of the bottom plate positioning steel bars, and adds transverse short steel bars; the transverse steel bars of the web positioning net are lengthened. The optimized positioning net has good integrity and serves as the connecting bars between the upper and lower / inner and outer two-layer steel bar nets, saving materials while facilitating construction.

[0029] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the disclosure of the present invention. Brief Description of the Drawings

[0030] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in line with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0031] Figure 1 It is a flowchart of the BIM-based steel bar optimization treatment method for high-speed railway precast beams provided by an embodiment of the present invention.

[0032] Figure 2 It is a schematic diagram of steel bar splitting provided by an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of canceling or reducing steel bar bends provided by an embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of changing the shape of steel bars provided in an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram of the optimized prestressed steel bundle positioning mesh steel bars provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0037] The BIM-based high-speed railway prefabricated beam reinforcement optimization processing method provided in an embodiment of the present invention includes:

[0038] The steel bar form is optimized based on BIM, and the steel bar processing is optimized by merging or splitting steel bars, canceling or reducing steel bar hooks, changing the shape of steel bar hooks, changing the shape of steel bars, changing the form of positioning steel bar mesh, adjusting the length of steel bars, and rotating steel bars.

[0039] The changing of the shape of the steel bar provided in the embodiment of the present invention includes: bending the steel bar at a small angle to straighten it under the premise of meeting the use requirements.

[0040] The small angle provided by the embodiment of the present invention is 1-10°.

[0041] The embodiment of the present invention provides a method for changing the positioning steel mesh form, including: connecting the bottom plate and web positioning mesh steel bars into a whole; moving the bottom plate positioning steel bars up by 10 to 200 mm, adding short transverse steel bars; and lengthening the transverse steel bars of the web positioning mesh.

[0042] The rotating steel bar provided in the embodiment of the present invention includes: rotating the steel bar by 10 to 270 degrees along the axis of the steel bar itself.

[0043] like Figure 1 As shown, the BIM-based high-speed railway prefabricated beam reinforcement optimization processing method provided by the embodiment of the present invention includes:

[0044] S101, obtaining a high-speed railway precast beam BIM model including high-speed railway precast beam reinforcement and various components of the high-speed railway precast beam;

[0045] S102, determining application scenarios and types of steel bars for high-speed railway precast beams based on the high-speed railway precast beam BIM model;

[0046] S103. Optimize the high-speed railway precast beam steel bars separately based on the determined application scenarios and types of the high-speed railway precast beam steel bars.

[0047] The optimization of the high-speed railway precast beam steel bars separately based on the determined application scenarios of the high-speed railway precast beam steel bars provided by the embodiments of the present invention includes:

[0048] When it is difficult to manufacture the steel bars and form the steel bar cage by binding / welding, optimize the high-speed railway precast beam steel bars by splitting, canceling or reducing the steel bar bends.

[0049] When the construction is difficult, optimize the high-speed railway precast beam steel bars by changing the shape of the steel bars and straightening the steel bars by bending them at a small angle on the premise of meeting the use requirements.

[0050] When the steel bar bends cannot meet the space requirements of the bend positions, optimize the high-speed railway precast beam steel bars by changing the steel bar bend angles.

[0051] When there is interference between the steel bars in the box girder and the prestressed steel tendons, optimize the high-speed railway precast beam steel bars by adjusting the steel bar lengths.

[0052] When there is interference between the steel bars in the box girder and other embedded components, optimize the high-speed railway precast beam steel bars by rotating the steel bars.

[0053] The optimization of the high-speed railway precast beam steel bars separately based on the determined types of the high-speed railway precast beam steel bars provided by the embodiments of the present invention includes:

[0054] For the steel bars with complex shapes and difficult to manufacture or bind, perform steel bar splitting treatment.

[0055] The technical solution of the present invention will be further described below with specific embodiments.

[0056] Embodiment 1:

[0057] For the steel bars with complex shapes and difficult to manufacture and bind, one steel bar can be split into several steel bars, as Figure 2 shown.

[0058] As Figure 3 shown, cancel or reduce the steel bar bends to facilitate the manufacture of the steel bars and the formation of the steel bar cage by binding / welding.

[0059] The embodiments of the present invention provide that the steel bar bend angles can be changed to adapt to the space requirements of the bend positions. On the premise of meeting the use requirements, change the shape of the steel bars, especially straighten the steel bars by bending them at a small angle to facilitate the construction, as Figure 4 shown.

[0060] AsFigure 5 As shown in Figure 5 , the form of optimizing the positioning network steel bars of the prestressed steel tendons provided by the embodiments of the present invention includes: connecting the positioning network steel bars of the bottom plate and the web into a whole; moving up the transverse full-length steel bars of the bottom plate positioning steel bars and adding transverse short steel bars; and lengthening the transverse steel bars of the web positioning network. The optimized positioning network has good integrity and serves as the connecting bars between the upper and lower / inner and outer two-layer steel bar meshes, which facilitates construction and saves materials at the same time.

[0061] By adjusting the length of the steel bars, interference with the prestressed steel tendons inside the box girder is avoided. By rotating the steel bars by a certain angle around their own axes, interference with other embedded components inside the box girder is avoided.

[0062] As mentioned above, only the relatively optimal specific implementation manners of the present invention are described, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention by any person skilled in the technical field of the present invention within the technical scope disclosed by the present invention shall be covered by the protection scope of the present invention.

Claims

1. A method for optimizing the reinforcement of precast beams for high-speed railways based on BIM, characterized in that, The BIM-based optimized processing method for the steel bars of high-speed railway precast beams includes: Simulating the construction process and sequence of the steel bars, optimizing the steel bar forms based on BIM, and performing optimized processing on the steel bars by merging or splitting the steel bars, canceling or reducing the steel bar bends, changing the shapes of the steel bar bends, changing the shapes of the steel bars, changing the forms of the positioning steel bar meshes, adjusting the lengths of the steel bars, and rotating the steel bars. The BIM-based optimized processing method for the steel bars of high-speed railway precast beams includes the following steps: Obtaining a BIM model of a high-speed railway precast beam that includes the steel bars of the high-speed railway precast beam and each component of the high-speed railway precast beam. Determining the application scenarios and types of the steel bars of the high-speed railway precast beam based on the BIM model of the high-speed railway precast beam, and performing optimized processing on the steel bars of the high-speed railway precast beam respectively based on the determined application scenarios and types of the steel bars of the high-speed railway precast beam. The performing optimized processing on the steel bars of the high-speed railway precast beam respectively based on the determined application scenarios of the steel bars of the high-speed railway precast beam includes: When it is difficult to manufacture the steel bars or form the steel bar cages by binding / welding, performing optimized processing on the steel bars of the high-speed railway precast beam by splitting the steel bars, canceling or reducing the steel bar bends. When the construction is difficult, performing optimized processing on the steel bars of the high-speed railway precast beam by changing the shapes of the steel bars and straightening the steel bars by bending them at a small angle on the premise of meeting the usage requirements. When the steel bar bends cannot meet the spatial requirements of the bend positions, performing optimized processing on the steel bars of the high-speed railway precast beam by changing the angles of the steel bar bends. When there is interference between the steel bars in the box girder and the prestressed steel tendons, performing optimized processing on the steel bars of the high-speed railway precast beam by adjusting the lengths of the steel bars. When there is interference between the steel bars in the box girder and other embedded components, performing optimized processing on the steel bars of the high-speed railway precast beam by rotating the steel bars.

2. The method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to claim 1, characterized in that, The changing the shapes of the steel bars includes: straightening the steel bars by bending them at a small angle on the premise of meeting the stress and usage requirements; the small angle is 1-10°.

3. The method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to claim 1, characterized in that, The changing the forms of the positioning steel bar meshes includes: connecting the original separated bottom plate and web positioning steel bar meshes into a whole; moving the transverse full-length steel bars of the bottom plate positioning steel bars up by 10-200 mm and adding transverse short steel bars; lengthening the transverse steel bars of the web positioning mesh.

4. The method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to claim 1, characterized in that, The rotating the steel bars includes: rotating the steel bars by 10-270° around the axis of the steel bars themselves.

5. The method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to claim 1, characterized in that, The performing optimized processing on the steel bars of the high-speed railway precast beam respectively based on the determined types of the steel bars of the high-speed railway precast beam includes: Performing steel bar splitting processing on the steel bars with complex shapes and difficult to manufacture or bind.

6. Application of the method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to any one of claims 1-5 in high-speed railway construction.

7. Application of the method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to any one of claims 1-5 in the construction of simply supported beams of high-speed railways.

8. A method for intelligent construction of reinforcement for implementing the method for optimizing the reinforcement of precast beams for high-speed railways based on BIM according to any one of claims 1-5.

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