A high-speed railway prefabricated beam steel optimization processing method based on BIM and application thereof

Abstract

A high-speed railway prefabricated beam steel bar optimization processing method based on BIM and application, comprising the following steps: S1, creating a three-dimensional model of the prefabricated beam steel bar based on BMI technology, calculating each output file by setting SATWE preprocessing parameters, comparing the overall calculation indicators, and proposing an optimal design calculation model for the steel bar framework; S2, optimizing the design, construction and application scheme of the three-dimensional model; S3, designing and processing the prefabricated component according to the optimization scheme, making the steel bar into different specifications of steel prefabricated components, and splicing and installing the prefabricated components. The present application carries out all-round three-dimensional modeling on the railway prefabricated beam steel bar framework through BIM technology, analyzes the feasibility and optimizes the steel bar framework during design, eliminates the steel bar interference problem in advance, simulates the steel bar framework assembly construction process, fine plans the installation, reduces the resource consumption, and reduces the construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a high-speed railway prefabricated beam reinforcement optimization processing method based on BIM and application. BACKGROUND

[0002] The prefabricated beam of railway is a key structural component in modern railway construction. In the traditional prefabricated beam production, the components mainly include the beam body itself, and the beam body is composed of a reinforcement framework and concrete. The reinforcement framework is the core component of the prefabricated beam, and its design and manufacturing quality directly affects the safety and economy of the railway line. The production process of the reinforcement framework includes cutting, bending and welding of steel bars to form steel components of predetermined shape and size, and assembling into a complete reinforcement framework on the assembly platform according to the design drawing.

[0003] In the traditional design of prefabricated beam of railway, the arrangement and quantity of steel bars often follow fixed standard modes, lacking fine optimization for specific geographical environment, load conditions and material performance, which leads to excessive consumption of resources, and may also affect the durability and safety of the structure due to insufficient design redundancy. In addition, the reinforcement framework of prefabricated beam of railway uses two-dimensional design, the number of steel bars is large, the structure is complex, and interference between steel components is prone to occur. The design optimization process of the reinforcement framework is relatively difficult, and the steel bar binding and installation process is time-consuming and laborious, with high construction cost. SUMMARY

[0004] The purpose of the present application is to provide a high-speed railway prefabricated beam reinforcement optimization processing method based on BIM to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A high-speed railway prefabricated beam reinforcement optimization processing method based on BIM, comprising the following steps:

[0007] S1, creating a three-dimensional model of the prefabricated beam reinforcement based on the BMI technology, calculating the output files by setting the SATWE preprocessing parameters, comparing the overall calculation indicators such as structural response, stress and strain analysis under different loads, and proposing an optimized design calculation model for the reinforcement framework;

[0008] S2, optimizing the design, construction and application scheme of the three-dimensional model, the optimization processing method comprising: adjusting the position of the steel bar, optimizing the top plate steel bar, optimizing the bottom web steel bar, optimizing the longitudinal and transverse steel bars, and optimizing the positioning mesh;

[0009] S3, designing and processing the prefabricated components according to the optimization scheme, making the steel bars into different specifications of steel prefabricated components, and splicing and installing the prefabricated components.

[0010] As a preferred scheme of the present application, the SATWE pretreatment parameters in the step S1 include setting basic information, seismic information, wind load information and global analysis parameters.

[0011] As a preferred scheme of the present application, the roof steel bar optimization in the step S2 includes connecting the floor longitudinal steel bars into one or changing into three segments.

[0012] As a preferred scheme of the present application, the floor web steel bar optimization in the step S2 includes inserting a reinforcing bar at each upper and lower corner of the small U-shaped bar.

[0013] As a preferred scheme of the present application, the longitudinal and transverse steel bar optimization in the step S2 includes that the outer longitudinal steel bars of the box girder are long and have no hooks, the inner longitudinal steel bars of the box girder are divided into three, are set as hooks, and the hook of the web inside stirrup is changed from 135° to a flat hook.

[0014] As a preferred scheme of the present application, the positioning mesh optimization in the step S2 includes connecting the positioning mesh steel bars and the inner ring steel cage into a whole.

[0015] As a preferred scheme of the present application, the steel bar optimization equipment includes an intelligent steel strip mesh welding device, a steel mesh welding device, a box girder positioning mesh intelligent welding device, a numerical control steel bar hydraulic shearing device and a large U-shaped steel bar bending center.

[0016] As a preferred scheme of the present application, the large U-shaped steel bar bending center includes a stepped feeding structure, a steel bar positioning structure and a large U-shaped steel bar bending structure.

[0017] The steel bar positioning structure includes a photoelectric sensor and a feeding positioning clamp, the feeding positioning clamp includes a base, a clamping block is fixedly installed on one side of the base, a gas cylinder shell is installed on the other side of the base, an inner push cylinder is installed in the gas cylinder shell, an inner push block is fixedly connected to the front end of the inner push cylinder, a space formed between the base, the clamping block and the inner push block is a clamping groove, a rodless cylinder is fixedly connected below the base and is perpendicular to the movement direction of the inner push block, a support seat for supporting the feeding positioning clamp is connected to the bottom of the rodless cylinder, a connecting seat is fixedly installed on the inner push cylinder side of the support seat, the support seat is fixedly connected with a mechanical arm through the connecting seat, the feeding positioning clamp has at least three and is uniformly arranged to clamp the center and both ends of the steel bar, the photoelectric sensor has two and is symmetrically installed on both sides of the positioning structure, the photoelectric sensor is positioned and recognized at the bottom of the clamping groove and close to the clamping block side.

[0018] The large U-shaped reinforcing steel bending structure comprises a bending positioning clamp, a first bending mechanism and a second bending mechanism, the bending positioning clamp is fixedly connected with a mechanical arm, a small bending head is fixedly installed above the first bending mechanism, and a large bending head is fixedly installed above the second bending mechanism.

[0019] Another purpose of the present application is to provide an application of the BIM-based high-speed railway prefabricated beam steel optimization processing method in railway prefabricated box girder construction.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] In the present application, the BIM technology is used to make a comprehensive three-dimensional model of the railway prefabricated beam reinforcement framework, to analyze the feasibility and optimize the reinforcement framework during design, to eliminate the reinforcement interference problem in advance, to simulate the reinforcement framework assembly construction process, to finely plan the installation, to improve the construction efficiency, and to cancel the fixed-length shearing structure in the prior art for the large U-shaped reinforcement bending center, thereby reducing resource consumption and reducing construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein the same or corresponding elements are referred to by the same or corresponding reference numerals, in which:

[0023] Figure 1 A reinforcement position optimization example diagram provided for the embodiment 1 of the present application;

[0024] Figure 2 A reinforcement top plate optimization example diagram provided for the embodiment 1 of the present application;

[0025] Figure 3 A bottom web reinforcement optimization example diagram provided for the embodiment 1 of the present application;

[0026] Figure 4 A longitudinal reinforcement optimization example diagram provided for the embodiment 1 of the present application;

[0027] Figure 5 An inside web hoop reinforcement N15 optimization example diagram provided for the embodiment 1 of the present application;

[0028] Figure 6 A bottom plate upper layer reinforcement N35 optimization example diagram provided for the embodiment 1 of the present application;

[0029] Figure 7 A positioning mesh optimization example diagram provided for the embodiment 1 of the present application;

[0030] Figure 8The stereoscopic structure example diagram of the feeding positioning clamp provided for the embodiment 1 of the present application is shown in the figure;

[0031] Marked with reference numerals:

[0032] 1, base; 2, clamp block; 3, cylinder shell; 4, inner push cylinder; 5, inner push block; 6, rodless cylinder; 7, support seat; 8, connecting seat; 9, clamping groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] Embodiment 1, the present application provides a technical solution:

[0036] The present application creates a three-dimensional model of the prefabricated beam reinforcement based on the BMI technology, which allows detailed definition of the properties of building materials, so that the three-dimensional model of the reinforcement can accurately reflect its material properties, size and position information. SATWE preprocessing parameters are set for structural analysis and calculation, and the SATWE preprocessing parameters include but are not limited to basic information, seismic information, wind load information and global analysis parameters, etc. Then output multiple files, including structural response, stress and strain analysis under various loads, which can be compared and analyzed in detail, and the performance of the prefabricated beam reinforcement under various working conditions can be evaluated comprehensively, and the layout, structure, quantity or connection mode of the reinforcement skeleton can be optimized and adjusted based on this.

[0037] The design, construction and application scheme of the three-dimensional model are optimized, and the optimization processing method includes adjusting the position of the reinforcement, optimizing the top plate reinforcement, optimizing the bottom web reinforcement, optimizing the longitudinal and transverse reinforcement, and optimizing the positioning mesh.

[0038] As Figure 1As shown in the figure, the steel bar position optimization method provided by the embodiment of the application comprises: placing the longitudinal through steel bars of the steel bar framework top plate when assembling the mesh, wherein the original steel bars N5 and the steel bars N7 are placed side by side, the through steel bar N14 is located below the two, the steel bars N7 are shortened, so that the original position relationship becomes the steel bars N5, the through steel bar N14 and the steel bars N7, in addition, the bottom through steel bar N16 is placed outside the web inside hoop N15 and the bottom plate upper layer steel bar N35 hook.

[0039] The steel bar position optimization method can avoid interference generated in the process of assembling the steel bar framework mesh, wherein through adjustment of the length of the steel bars N7 and the positions of the through steel bars 14 and the through steel bar N16, the problem that the through steel bar cannot be hooked is solved, the demand of mesh assembly is met, and the construction difficulty is reduced.

[0040] As shown in the figure, Figure 2 The steel bar top plate optimization method provided by the embodiment of the application comprises: connecting each section of each number of steel bars of the bottom plate into one, as shown in 2b of the figure, Figure 2 Or changing each section of each number of steel bars of the bottom plate into three sections of connection, as shown in 2c of the figure. Figure 2

[0041] As shown in the figure, Figure 2 Because the bottom of the prefabricated beam bridge deck has a gradually changing thickness according to the section, the bottom layer steel bars are arranged along the gradually changing section, therefore, by using the above steel bar top plate optimization method, the lap length of the related steel bars can be reduced, and the production cost is reduced.

[0042] As shown in the figure, Figure 3 The bottom web steel bar optimization provided by the embodiment of the application comprises: inserting a reinforcing bar into each corner of the small U-shaped bar.

[0043] The bottom web steel bar optimization method strengthens the local strength and rigidity of the beam by the way of inserting reinforcing bars, and at the same time, the method of inserting reinforcing bars one by one avoids interference between steel bars caused by assembling steel bars in pieces, and this optimization method can more accurately control the position and quantity of the reinforcing bars.

[0044] As shown in the figure, Figures 4-6 The longitudinal and transverse steel bar optimization provided by the embodiment of the application comprises: the through length of the longitudinal steel bars of the outer circle of the box girder, and there is no hook, the longitudinal steel bars of the inner circle of the box girder are divided into three, the inner circle longitudinal steel bars are provided with hooks, at the same time, the hooks of the top plate beam end bending steel bars can be cancelled according to the actual situation, the bottom plate and the web still maintain the original design with hooks, and this optimization method avoids interference between the steel bars and the prestressed pipe after the steel bars are lengthened.

[0045] ​For a single monolithic skeleton, the web inside stirrup hook can be changed from 135° to flat hook, the optimization method is convenient for the flat hook of the web inside stirrup N15 to be welded or tied with the bottom plate upper layer reinforcement N35, to form an integral skeleton, for the bottom plate upper layer reinforcement N35, the anchoring length can be shortened, and the straight end scheme of the bottom plate upper layer reinforcement N35 is considered, which is convenient for construction, but the bottom plate upper layer reinforcement N35 needs to be welded or tied with the web inside stirrup N15 and the longitudinal reinforcement, wherein the bottom plate upper layer reinforcement N35 is a transverse stress reinforcement, and the anchoring length should meet 35d.

[0046] As shown in Figure 7 The positioning net optimization provided by the embodiment of the present application comprises: connecting the positioning net reinforcement and the inner ring reinforcement cage to form a stable overall structure, the connection can adopt welding, tying or other effective connection modes to ensure that the connection between the two is firm and reliable.

[0047] If the precast beam reinforcement skeleton is installed in the order of arranging the web outside large U-shaped reinforcement and longitudinal reinforcement, inserting the positioning net reinforcement, installing the inner ring reinforcement cage and installing the upper layer reinforcement net, the transverse reinforcement in the positioning net reinforcement is welded on the web inside and outside steel stirrup, and when the inner ring reinforcement cage with longitudinal reinforcement is hoisted and installed from the top, the spacing between the transverse reinforcement of the positioning net and the longitudinal reinforcement of the inner ring reinforcement cage is only 12mm in theory, and considering the deformation of the reinforcement cage, interference will be caused, and the interference problem between the reinforcement net and the reinforcement cage can be avoided through the positioning net optimization method.

[0048] As shown in Figure 8 The large U-shaped reinforcement bending center provided by the embodiment of the present application comprises: a stepped feeding structure, a reinforcement positioning structure and a large U-shaped reinforcement bending structure.

[0049] The reinforcing steel positioning structure comprises a photoelectric sensor and a feeding positioning clamp, the feeding positioning clamp comprises a base 1, a clamping block 2 is fixedly installed on one side of the upper surface of the base 1, a cylinder shell 3 is correspondingly installed on the other side of the base 1, the cylinder shell 3 is fixedly connected with the base 1, an inner push cylinder 4 is fixedly installed in the cylinder shell 3, an inner push block 5 is fixedly connected with the front end of the inner push cylinder 4, the inner push cylinder 4 can drive the inner push block 5 to move towards the clamping block 2 to complete the preliminary positioning of the reinforcing steel, a space formed between the base 1, the clamping block 2 and the inner push block 5 is a clamping groove 9, a rodless cylinder 6 is fixedly connected below the base 1 and is arranged perpendicularly to the movement direction of the inner push block 5, the rodless cylinder 6 is fixedly connected with a supporting seat 7 for supporting the feeding positioning clamp at the bottom, a connecting seat 8 is fixedly installed on one side of the inner push cylinder 4 on the upper surface of the supporting seat 7, the supporting seat 7 is fixedly connected with a mechanical arm through the connecting seat 8, the feeding positioning clamp is at least three and is uniformly arranged to clamp the center and two ends of the reinforcing steel respectively, two photoelectric sensors are symmetrically installed on both sides of the positioning structure, the photoelectric sensors are positioned and recognized at the bottom of the clamping groove 9 and are close to the side of the clamping block 2, and the photoelectric sensors can be used to identify the distance between the reinforcing steel end point and the photoelectric sensor when the reinforcing steel is preliminarily positioned.

[0050] The large U-shaped reinforcing steel bending structure comprises a bending positioning clamp, a first bending mechanism and a second bending mechanism, the bending positioning clamp is fixedly connected with a mechanical arm, a small bending head is fixedly installed above the first bending mechanism, and a large bending head is fixedly installed above the second bending mechanism.

[0051] In the operation flow description of the implementation stage of the present application, after the device is activated, the first step involves the orderly conveying and lifting of the reinforcing steel by the stepped feeding structure, when the conveying process reaches the predetermined high position, the reinforcing steel will smoothly transition and accurately slide into the clamping groove 9 of the feeding positioning clamp. Then, the rodless cylinder 6 assembly in the system is activated, the inner push block 5 is driven to move along the predetermined track to complete the initial accurate positioning of the reinforcing steel. After this stage, the high-sensitivity photoelectric sensor group is involved, the distance between the two ends of the reinforcing steel and the sensor is accurately measured, and the displacement information is converted into an electrical signal to immediately instruct the rodless cylinder 6 to make fine adjustments to ensure that the distance between the two ends of the reinforcing steel is completely consistent, that is, the reinforcing steel positioning is completed.

[0052] After the positioning program is completed, the preprogrammed mechanical arm system is started to control the feeding positioning clamp to smoothly transfer the reinforcing steel that has been positioned to the first bending mechanism, at this time the bending positioning clamp immediately connects to firmly clamp the reinforcing steel, at the same time, the feeding positioning clamp is automatically released and returns to the initial state. Then, the first bending mechanism program is started to implement small-angle forming processing on the two ends of the reinforcing steel, then the bending positioning clamp works again to transfer the reinforcing steel to the second bending mechanism to perform overall forming processing on the reinforcing steel to form a large U-shaped reinforcing steel.

[0053] In the prior art, the large U-shaped reinforcing bar bending center contains a fixed-length shearing structure, and a certain amount of allowance needs to be reserved for the reinforcing bar during processing. After the reinforcing bar passes through the stepped feeding structure, the fixed-length shearing structure is used for fixed-length positioning and shearing of the reinforcing bar, and then the reinforcing bar is sent to the clamp structure, so that the positioning production of the reinforcing bar by the clamp is realized. The large U-shaped reinforcing bar bending center provided by the embodiment improves the reinforcing bar positioning structure, and the reinforcing bar does not need to reserve an allowance during production, thereby avoiding the cutting of the reinforcing bar and the recycling of the cut reinforcing bar head, reducing energy consumption and saving construction cost.

[0054] Embodiment 2 is mainly different from embodiment 1 in that:

[0055] The transverse reinforcing bar optimization method provided by the embodiment 2 of the application sets a hook or an anchoring plate scheme for the bottom plate upper layer reinforcing bar N35, the scheme reduces the reinforcing bar use length by 320 mm, and interference with the web outer side reinforcing bar can be avoided.

[0056] Although the embodiments of the application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A BIM-based method for reinforcing bar optimization of a high-speed railway precast beam, characterized in that, The method comprises the following steps: S1, creating a three-dimensional model of prefabricated beam reinforcement based on BIM technology, calculating each output file by setting SATWE preprocessing parameters, comparing overall calculation indicators, outputting structural response, stress and strain analysis under different loads, and proposing an optimized design calculation model for the reinforcement framework; S2, optimizing the design, construction and application scheme of the three-dimensional model, the optimization method comprising adjusting the position of the reinforcement, optimizing the top slab reinforcement, optimizing the bottom web reinforcement, optimizing the longitudinal and transverse reinforcement, and optimizing the positioning mesh; S3, designing and processing prefabricated components according to the optimization scheme, making the reinforcement into different specifications of prefabricated reinforcement components, and splicing and installing the prefabricated components; The SATWE preprocessing parameters in step S1 include setting basic information, seismic information, wind load information and global analysis parameters; The top slab reinforcement optimization in S2 includes connecting the longitudinal reinforcement of the top slab into one piece or changing it to three connected pieces; the bottom web reinforcement optimization includes inserting a reinforcing bar into each corner of the small U-shaped bar; the longitudinal and transverse reinforcement optimization includes making the longitudinal reinforcement of the outer circle of the box girder continuous without hooks, dividing the longitudinal reinforcement of the inner circle of the box girder into three pieces and setting hooks, and changing the hook of the inboard stirrup from 135° to a flat hook.

2. The BIM-based high-speed railway precast beam steel optimization processing method according to claim 1, characterized in that, The positioning mesh optimization in step S2 includes connecting the positioning mesh reinforcement and the inner circle reinforcement cage into a whole. 3.The BIM-based high-speed railway precast beam steel optimization processing method according to claim 1, characterized in that, The steel reinforcement optimization equipment includes an intelligent steel strip mesh welding device, a steel mesh welding device, a box girder positioning mesh intelligent welding device, a numerical control steel reinforcement hydraulic shearing device, and a large U-shaped steel reinforcement bending center.

4. The BIM-based high-speed railway precast beam steel optimization processing method according to claim 3, characterized in that, The large U-shaped steel reinforcement bending center comprises a stepped feeding structure, a steel reinforcement positioning structure, and a large U-shaped steel reinforcement bending structure. The steel reinforcement positioning structure comprises a photoelectric sensor and a feeding positioning clamp, the feeding positioning clamp comprises a base, one side of the upper surface of the base is fixedly provided with a clamping block, the other side of the base is provided with a gas cylinder shell, the inside of the gas cylinder shell is provided with an inner push cylinder, the front end of the inner push cylinder is fixedly connected with an inner push block, and the space formed between the base, the clamping block and the inner push block is a clamping groove, a rodless cylinder is fixedly connected below the base and is arranged perpendicularly to the movement direction of the inner push block, the bottom of the rodless cylinder is connected with a support seat for supporting the feeding positioning clamp, a connecting seat is fixedly connected to the upper surface of the inner push cylinder side of the support seat, and the support seat is fixedly connected with a mechanical arm through the connecting seat, the feeding positioning clamp has at least three clamping blocks which are uniformly arranged and clamp the center and both ends of the steel reinforcement respectively, and two photoelectric sensors are symmetrically arranged on both sides of the positioning structure, the photoelectric sensors are positioned and recognized at the bottom of the clamping groove and close to the clamping block side. The large U-shaped steel reinforcement bending structure comprises a bending positioning clamp, a first bending mechanism and a second bending mechanism, the bending positioning clamp is fixedly connected with a mechanical arm, a small bending head is fixedly installed above the first bending mechanism, and a large bending head is fixedly installed above the second bending mechanism.

5. The application of the BIM-based high-speed railway precast beam steel optimization processing method in the construction of railway precast box girder according to any one of claims 1-4.

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