Intelligent construction method for connecting steel bars of pc components in wrong positions

Abstract

The application discloses an intelligent construction method for PC component steel bar dislocation connection, and comprises the following steps: S1, designing the number of overhanging steel bars of PC components; S2, designing the arrangement of overhanging steel bars of PC components according to constraint values; S3, simulating the installation of PC components based on a three-dimensional structure model of a building, and when the overhanging steel bars of two PC components in a post-cast area collide or the spacing does not meet the construction error control requirement trigger threshold, returning to step S2 to modify the arrangement of overhanging steel bars of PC components; otherwise, executing step S4; S4, monitoring the production of PC components based on the three-dimensional structure model of PC components through a machine vision device, so that the production of PC components meets the requirements. Compared with the prior art, the application realizes automatic design and intelligent production of PC components, and the structural design avoids quality problems such as collision or too large spacing of overhanging steel bars in a post-cast area in the subsequent PC component installation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PC component production, and particularly to an intelligent construction method for PC component steel bar misalignment connection. BACKGROUND

[0002] The current design and production process of prefabricated concrete components (PC components) still has significant automation defects and relies excessively on manual intervention. This production mode mainly has the following problems: first, manual interpretation of architectural drawings and specifications is prone to understanding deviations, and steel bar arrangement schemes are mostly determined based on experience, lacking standardized processes; second, due to insufficient precision in the design stage, quality problems such as collision or excessive spacing of post-pouring area overhanging steel bars frequently occur in the later installation stage; finally, the rework process after the problem is exposed involves redesign and reproduction, not only causing material waste, but also seriously affecting the overall project progress. This inefficient production method directly leads to systematic disadvantages such as low production efficiency, poor quality stability, and difficulty in cost control. SUMMARY

[0003] The present application provides an intelligent construction method for PC component steel bar misalignment connection to solve the problem of the inability of prefabricated concrete components to be produced automatically in the prior art.

[0004] The present application provides an intelligent construction method for PC component steel bar misalignment connection, comprising the following steps:

[0005] S1: Calculate the density of overhanging steel bars of all PC components in the building according to the CAD drawing of the building, if the density of overhanging steel bars of the PC component exceeds a predetermined value, modify the cross-sectional size of the PC component or the number of overhanging steel bars, the density of overhanging steel bars being the ratio of the number of overhanging steel bars to the width of the PC component;

[0006] S2: Take the misalignment distance of overhanging steel bars of adjacent PC components in the post-pouring area after misalignment connection as a constraint value, in the three-dimensional structure model of the building, first arrange the overhanging steel bars of the two PC components, then adjust the position of the overhanging steel bars of the other PC component according to the constraint value with the position of the overhanging steel bars of one PC component as a reference, and the overhanging steel bars of other PC components are adjusted with the position of the overhanging steel bars of the arranged PC component as a reference, when the PC component simulation installation fails, the distance between the overhanging steel bars of the two simulated failed PC components is expanded;

[0007] S3: Based on the three-dimensional structure model of the building, simulate the installation of the PC components, when the overhanging steel bars of two PC components in the post-pouring area collide or the spacing does not meet the construction error control requirement trigger threshold, return to step S2 to modify the arrangement of the overhanging steel bars of the PC components; otherwise, execute step S4;

[0008] S4: Based on the three-dimensional structure model of PC components, the production of PC components is monitored by machine vision equipment to make the size, position and length of the protruding steel bar of PC components accurate.

[0009] Preferably, in step S1, the size, cross section and reinforcement specification of the PC component are extracted according to the CAD drawing of the building, and then the density of the protruding steel bar of the PC component is calculated. If the density of the protruding steel bar of the PC component exceeds the predetermined value, the cross section size of the PC component or the number of protruding steel bars is modified.

[0010] Preferably, in step S1, based on the logical relationship between the size and reinforcement matching of various PC components, the ratio of the number of steel bars to the width of the component is used as a constraint function. When the density of the protruding steel bar of the PC component exceeds the limit value of the constraint function, the cross section size of the PC component or the number of protruding steel bars is modified.

[0011] Preferably, in step S1, the beam, plate, wall, column contour, steel bar identification and size marking of the building CAD drawing are identified, and the size, cross section and reinforcement specification of the PC component are extracted.

[0012] Preferably, in step S2: In step S2: In the three-dimensional structure model of the building, the distance of the steel bar offset in the offset connection post-cast area of the adjacent PC component protruding connecting steel bar is used as a constraint value. First, the first PC component protruding steel bar of the offset connection post-cast area is preliminarily arranged, and then the second PC component protruding steel bar is preliminarily arranged and adjusted in position by the constraint value. If the second PC component protruding steel bar can be arranged, the arrangement of the two PC component protruding steel bars is successful, otherwise the position of the first PC component protruding steel bar is modified, and then the second PC component protruding steel bar is preliminarily arranged and adjusted in position by the constraint value, until the arrangement of the two PC component protruding steel bars is completed.

[0013] Preferably, in step S2, the three-dimensional structure model of the building is established by identifying the CAD design drawing of the building, the three-dimensional structure model includes the shape, size and reinforcement of the PC component, the reinforcement includes the diameter and length of the protruding steel bar of the PC component, and the three-dimensional structure model further includes the position and size of the post-cast area between the PC components.

[0014] Preferably, in step S2, the three-dimensional structure model of the building is modified according to the PC component with arranged protruding steel bars, and then the three-dimensional design model and two-dimensional deepening design drawing of all PC components are generated according to the modified three-dimensional structure model.

[0015] Preferably, in step S3, when the simulation installation of the PC component is successful, the lifting scheme is generated according to the simulated PC component lifting steps.

[0016] Preferably, in step S4, after the steel reinforcement framework of the PC component is tied up, the steel reinforcement framework of the PC component is scanned and a first entity model of the PC component is established, then the first entity model of the PC component is compared with the three-dimensional design model of the PC component, the length of the steel reinforcement framework of the PC component and the position of the protruding steel bars of the misaligned connection are detected, when the deviation exceeds the threshold value, automatic early warning and modification of the production scheme are performed.

[0017] Preferably, in step S4, after the steel reinforcement framework of the PC component is verified to be correct, the formwork is installed on the steel reinforcement framework, the formwork and the protruding steel bars outside the formwork are scanned, and a second entity model of the PC component is established, then the second entity model of the PC component is compared with the three-dimensional design model of the PC component, the size of the PC component, the protruding length of the protruding steel bars of the misaligned connection, and the relative position of the steel reinforcement framework in the PC component are detected, when the deviation exceeds the threshold value, automatic early warning and modification of the production scheme are performed.

[0018] Preferably, in step S4, after the production of the PC component is completed, the PC component is scanned and a third entity model of the PC component is established, then the third entity model of the PC component is compared with the three-dimensional design model of the PC component, the size of the PC component, the position of the protruding steel bars of the misaligned connection, the position of the embedded parts, and the flatness of each edge of the component are detected, and the inspection data and report of each numbered prefabricated component are automatically generated.

[0019] Preferably, after step S4, step S5 is further included, and the step S5 includes the following steps: when the PC component is hoisted, the design pose and the actual pose are superimposed in real time through an AR helmet or AR glasses; the worker is dynamically guided to install the PC component, when the installation error exceeds the allowable value, automatic early warning and generation of an arrow to guide the worker to fine-tune the PC component are performed, and when the installation error meets the requirements, a sound and light is triggered to promote, and the misaligned post-cast area is allowed to be poured.

[0020] Preferably, after step S5, step S6 is further included, and the step S6 includes the following steps: during the construction hoisting process, when a PC component is accurately positioned after hoisting, the data is transmitted to the acceptance personnel, the acceptance personnel is required to complete the acceptance before the next process construction, and data storage is formed.

[0021] Compared with the prior art, in the present application, the number of protruding steel bars of the PC component is first determined through a constraint function, after knowing the number of protruding steel bars of the PC component, the preliminary arrangement design of the protruding steel bars of the PC component is completed through a constraint value, then the final arrangement design of the protruding steel bars of the PC component is completed in combination with simulation construction, and then the PC component is produced according to the designed PC component drawing, realizing automatic design and intelligent production of the PC component, and the structure design avoids quality problems such as collision or excessive spacing of the protruding steel bars of the post-cast area in the subsequent PC component installation process. It is beneficial to ensure construction efficiency and save construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions in the present application or prior art clearer, the drawings needed to be used in the following embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 Workflow diagram of the present application;

[0024] Figure 2 Structural diagram of PC component of the present application.

[0025] Reference signs:

[0026] 1. PC component, 11. Externally projecting steel bar, 2. Post-pouring area. DETAILED DESCRIPTION

[0027] In order to make the technical solutions in the present application or prior art clearer, the drawings needed to be used in the following embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Referring to the drawings Figure 1 , the present embodiment provides an intelligent construction method for PC component steel bar misalignment connection, comprising the following steps:

[0029] S1: Calculate the density of externally projecting steel bars 11 of all PC components 1 in the building according to the CAD drawing of the building, and if the density of externally projecting steel bars 11 of the PC component 1 exceeds a predetermined value, modify the cross-sectional size of the PC component 1 or the number of externally projecting steel bars 11;

[0030] Specifically, the image processing and deep learning are applied to identify the beam, plate, wall, column contour, steel bar mark and size mark of the building CAD drawing. On the basis that the PC component 1 section (width, height) meets the structural calculation, the PC component 1 size, section and reinforcement specification of the protruding steel bar 11 are extracted. Then, the density of the protruding steel bar 11 of the PC component 1 is calculated according to the extracted PC component 1 size, section and reinforcement specification of the protruding steel bar 11. The density of the protruding steel bar 11 is the ratio of the number of the protruding steel bar 11 to the width of the PC component 1. Based on the logical relationship between the PC component 1 size and the matching reinforcement, the ratio of the number of the steel bar to the width of the component is taken as a constraint function. When the density of the protruding steel bar 11 of the PC component 1 exceeds the limit value of the constraint function, it indicates that the protruding steel bar 11 of the PC component 1 is difficult to meet the steel bar misplacement connection requirement, for example, the density is too small, and the protruding steel bar 11 of other PC components 1 is difficult to insert. Then, a warning is given to modify the section size of the PC component 1 or the number of the protruding steel bar 11 to ensure that the PC component 1 design is reasonable.

[0031] S2: Taking the misplacement distance of the protruding steel bar 11 of the adjacent PC component 1 in the misplacement connection post-pouring area 2 as a constraint value, in the three-dimensional structure model of the building, the protruding steel bars 11 of the two adjacent PC components 1 are initially arranged, then the position of the protruding steel bar 11 of one PC component 1 is taken as a reference to adjust the position of the protruding steel bar 11 of the other PC component 1, and the position of the protruding steel bar 11 of the other PC component 1 is adjusted with reference to the position of the arranged protruding steel bar 11 of the PC component 1; when the PC component 1 simulation installation fails, the distance between the protruding steel bars 11 of the two simulated failed PC components 1 is expanded. After the protruding steel bar 11 of the PC component 1 extends into the misplacement connection post-pouring area 2, the steel bar arrangement position is misplaced while meeting the design and construction installation requirements. For example: taking the position of the protruding steel bar 11 of the first PC component 1 as a fixed point, the distance between the protruding steel bar 11 of the second PC component 1 extending into the concrete post-pouring area 2 and the protruding steel bar 11 adjacent to the first PC component 1 is taken as a constraint value, when the clear distance between the protruding steel bars 11 of the two PC components 1 is greater than d (d is the diameter of the protruding steel bar 11) + 10 mm, it is determined that the protruding steel bar 11 arrangement is passed. After the arrangement is passed, the position of the protruding steel bar 11 of the second PC component 1 is taken as a fixed point, the distance between the protruding steel bar 11 of the third PC component 1 extending into the concrete post-pouring area 2 and the protruding steel bar 11 adjacent to the second PC component 1 is taken as a constraint value, when the clear distance between the protruding steel bars 11 of the two PC components 1 is greater than d (d is the diameter of the protruding steel bar 11) + 10 mm, it is determined that the protruding steel bar 11 arrangement is passed.

[0032] The three-dimensional structural model of the building obtains an embodiment: a three-dimensional structural model of the building is established through building CAD design drawings, the three-dimensional structural model includes the shape, size and reinforcement of the PC component 1, the reinforcement includes the diameter and length of the external steel bars 11 of the PC component 1, and the three-dimensional structural model further includes the position and size of the post-cast area 2 between the PC components 1.

[0033] After the external steel bars 11 of the PC component 1 are arranged, the three-dimensional structural model of the building is modified according to the PC component 1, and all PC components 1 and the misaligned connecting post-cast areas 2 are intelligently numbered to form an optimized three-dimensional structural model. Then, the three-dimensional design model of all PC components 1 and the two-dimensional deepening design drawings are generated according to the optimized three-dimensional structural model, which facilitates the subsequent production of PC components 1 according to the PC component 1 drawings.

[0034] S3: Based on the optimized three-dimensional structural model obtained in step 2, the construction simulation software can realize the construction process simulation of the steel misaligned connecting structure PC component 1 and the selection of the PC component 1 hoisting and positioning mode. The installation of the PC component 1 is simulated through the construction simulation software. When the external steel bars 11 of two PC components 1 in the post-cast area 2 collide or the spacing is too small to meet the construction error control requirement trigger threshold, return to step S2 to re-modify the arrangement of the external steel bars 11 of the PC component 1; otherwise, execute step S4;

[0035] S4: Based on the three-dimensional structural model of the PC component 1, the production of the PC component 1 is monitored by the machine vision equipment, so that the size, position and length of the external steel bars 11 of the PC component 1 are accurate.

[0036] In step S4, after the steel reinforcement cage of the PC component 1 is bound, the steel reinforcement cage of the PC component 1 is scanned and a first entity model of the PC component 1 is established. Then, the first entity model of the PC component 1 is compared with the three-dimensional design model of the PC component 1 to detect the length of the steel reinforcement cage and the position of the misaligned connecting external steel bars 11. When the deviation exceeds the threshold value, an automatic warning is given and the production scheme is modified to ensure the accuracy of the relative position and length of all misaligned connecting external steel bars 11 of the PC component 1.

[0037] In step S4, after the steel reinforcement cage of the PC component 1 is verified to be correct, a template is installed on the steel reinforcement cage, and the template and the external steel bars 11 outside the template are scanned to establish a second entity model of the PC component 1. Then, the second entity model of the PC component 1 is compared with the three-dimensional design model of the PC component 1 to detect the size of the PC component 1, the external length of the misaligned connecting external steel bars 11, and the relative position of the steel reinforcement cage in the PC component 1. When the deviation exceeds the threshold value, an automatic warning is given and the production scheme is modified to ensure the accuracy of the size, external length and position of the external steel bars 11 of the PC component 1.

[0038] In step S4, after the production of the PC component 1 is completed, the PC component 1 is scanned and a third entity model of the PC component 1 is established, and then the third entity model of the PC component 1 is compared with the three-dimensional design model of the PC component 1. For example, after the production of the PC component 1 numbered 01 is completed, the PC component 1 entity is scanned and the third entity model numbered 01 is established, and then the three-dimensional design model of the PC component 1 numbered 01 is called out for comparison, the size, misaligned connection, overhanging steel bars 11, positioning, embedded part position, and straightness of each side of the component of the PC component 1 are detected, and the inspection data and report of each numbered PC component 1 are automatically generated. The inspection data and report are implemented to be delivered to the quality inspection personnel responsible for the acceptance, and the quality inspection personnel jointly detects in combination with the intelligent detection report of the factory after the component arrives at the site.

[0039] The machine vision device includes an industrial camera.

[0040] In step S2, in the three-dimensional structure model of the building, the distance of the misaligned connection of the overhanging connection steel bars in the misaligned connection post-cast area 2 is taken as a constraint value, the overhanging steel bars 11 of the first PC component 1 are preliminarily arranged, then the overhanging steel bars 11 of the second PC component 1 are preliminarily arranged and the position is adjusted through the constraint value, if the overhanging steel bars 11 of the second PC component 1 can be arranged, the arrangement of the overhanging steel bars 11 of the two PC components 1 is successful, otherwise the position of the overhanging steel bars 11 of the first PC component 1 is modified, then the overhanging steel bars 11 of the second PC component 1 are preliminarily arranged and the position is adjusted through the constraint value, until the arrangement of the overhanging steel bars 11 of the two PC components 1 is completed.

[0041] Specifically, in the preliminary arrangement of the overhanging steel bars 11 of the PC component 1, the overhanging steel bars 11 of the PC component 1 are arranged in the existing or conventional manner.

[0042] In step S3, when the simulated installation of the PC component 1 is successful, the hoisting scheme is generated according to the simulated hoisting steps of the PC component 1.

[0043] Step S4 further includes step S5, which includes the following steps: when the PC component 1 is hoisted, the actual data in the hoisting process of the project is collected by a machine vision method, and an actual model is formed by processing. When each PC component 1 is hoisted according to the hoisting scheme generated in step 3, the hoisting worker wears an AR helmet or AR glasses, and the AR section real-time superimposes the design pose (the three-dimensional design model of the PC component 1) and the actual pose (the actual model formed by the machine vision collection data); dynamically guide the worker to accurately position the PC component 1, when the installation error exceeds the allowable value, automatically alarm and generate an arrow to guide the worker to fine-tune the component, when the installation error meets the requirements, trigger the sound and light to improve, and allow the misaligned connection post-cast area 2 to be poured.

[0044] After step S5, step S6 is further included, which comprises the following steps: during the construction hoisting process, when a PC component 1 is hoisted and accurately positioned, data is transmitted to the acceptance personnel, the acceptance personnel is required to complete the acceptance before the next construction process, and data storage is formed.

[0045] Specifically, refer to the accompanying drawings Figure 2 The outer steel bar 11 of the PC component 1 is a steel bar located in the post-cast area 2, which is bound with the outer steel bar 11 of another PC component 1, and then the two PC components 1 are connected as a whole by pouring concrete.

[0046] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A smart construction method of PC component steel bar misalignment connection, characterized in that, The method comprises the following steps: S1: calculating the density of the external reinforcement of all PC components in the building according to the CAD drawing of the building, and modifying the cross-sectional size or the number of external reinforcement of the PC component if the density of the external reinforcement of the PC component exceeds a predetermined value, the density of the external reinforcement being the ratio of the number of external reinforcement to the width of the PC component; S2: taking the distance of the external reinforcement of adjacent PC components after the offset connection of the reinforcement in the offset connection post-cast area as a constraint value, arranging the external reinforcement of two PC components first in the two adjacent PC components in the three-dimensional structural model of the building, then adjusting the position of the external reinforcement of the other PC component according to the constraint value and taking the position of the external reinforcement of one PC component as a reference, and adjusting the position of the external reinforcement of the other PC component according to the position of the external reinforcement of the PC component arranged, expanding the distance between the external reinforcement of the two PC components if the PC component simulation installation fails; S3: simulating the installation of the PC component based on the three-dimensional structural model of the building, returning to step S2 to modify the arrangement of the external reinforcement of the PC component when the external reinforcement of two PC components in the post-cast area collides or the spacing does not meet the construction error control requirement trigger threshold; otherwise, step S4 is performed; S4: monitoring the production of the PC component based on the three-dimensional structural model of the PC component through a machine vision device to make the size, position and length of the external reinforcement of the PC component accurate.

2. The intelligent construction method of PC member steel bar misaligned connection according to claim 1, characterized in that, In step S1, the PC component size, cross section and reinforcement specification of the external reinforcement are extracted from the CAD drawing of the building, and then the density of the external reinforcement of the PC component is calculated, and the cross-sectional size or the number of external reinforcement of the PC component is modified if the density of the external reinforcement of the PC component exceeds a predetermined value.

3. The intelligent construction method of PC member steel bar misaligned connection according to claim 2, characterized in that, In step S1, based on the logical relationship between the size of various PC components and the matching of reinforcement, the ratio of the number of reinforcement to the width of the component is taken as a constraint function, and the cross-sectional size or the number of external reinforcement of the PC component is modified when the density of the external reinforcement of the PC component exceeds the limit value of the constraint function.

4. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 1, characterized in that, In step S2: in the three-dimensional structural model of the building, taking the distance of the external reinforcement of adjacent PC components after the offset connection of the reinforcement in the offset connection post-cast area as a constraint value, first arranging the external reinforcement of the first PC component in the offset connection post-cast area, then arranging the external reinforcement of the second PC component and adjusting the position through the constraint value, if the external reinforcement of the second PC component can be arranged, the arrangement of the external reinforcement of the two PC components is successful, otherwise the position of the external reinforcement of the first PC component is modified, then the external reinforcement of the second PC component is arranged and adjusted through the constraint value, until the arrangement of the external reinforcement of the two PC components is completed.

5. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 4, characterized in that, In step S2, the three-dimensional structural model of the building is established by recognizing the CAD design drawing of the building, the three-dimensional structural model comprises the shape, size and reinforcement of the PC component, the reinforcement comprises the diameter and length of the external reinforcement of the PC component, and the three-dimensional structural model further comprises the position and size of the post-cast area between the PC components.

6. The intelligent construction method of PC member steel bar misaligned connection according to claim 5, characterized in that, In step S2, the three-dimensional structure model of the building is modified according to the PC member with arranged external reinforcement, and then the three-dimensional design model and the two-dimensional detailed design drawing of all PC members are generated according to the modified three-dimensional structure model.

7. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 6, characterized in that, In step S3, when the simulation installation of the PC member is successful, the lifting scheme is generated according to the simulated lifting steps of the PC member.

8. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 7, characterized in that, In step S4, after the reinforcement cage of the PC member is bound, the reinforcement cage of the PC member is scanned and the first entity model of the PC member is established, then the first entity model of the PC member is compared with the three-dimensional design model of the PC member, the length of the reinforcement cage of the PC member and the position of the misaligned external reinforcement are detected, when the deviation exceeds the threshold value, the production scheme is automatically warned and modified.

9. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 8, characterized in that, In step S4, after the reinforcement cage of the PC member is bound, the reinforcement cage of the PC member is scanned and the first entity model of the PC member is established, then the first entity model of the PC member is compared with the three-dimensional design model of the PC member, the length of the reinforcement cage of the PC member and the position of the misaligned external reinforcement are detected, when the deviation exceeds the threshold value, the production scheme is automatically warned and modified.

10. The intelligent construction method of PC member steel bar misaligned joint connection according to claim 9, characterized in that, In step S4, after the reinforcement cage of the PC member is bound, the reinforcement cage of the PC member is scanned and the first entity model of the PC member is established, then the first entity model of the PC member is compared with the three-dimensional design model of the PC member, the length of the reinforcement cage of the PC member and the position of the misaligned external reinforcement are detected, when the deviation exceeds the threshold value, the production scheme is automatically warned and modified. In step S4, after the production of the PC member is completed, the PC member is scanned and the third entity model of the PC member is established, then the third entity model of the PC member is compared with the three-dimensional design model of the PC member, the size of the PC member, the misaligned external reinforcement and positioning, the position of the embedded part, and the flatness of each edge of the member are detected, and the inspection data and report of each numbered prefabricated member are automatically generated.

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