CN115618472A - Engineering structure digital pre-assembly method and system based on BIM model and application - Google Patents
Engineering structure digital pre-assembly method and system based on BIM model and application Download PDFInfo
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Abstract
The invention belongs to the technical field of prefabricated data identification of components, and discloses a BIM (building information modeling) -based engineering structure digital pre-assembly method, system and application. Scanning the section beam to be assembled after finishing the processing and converting the section beam into a model to obtain an accurate component error; combining the point cloud model with the BIM model to perform segment beam simulation pre-assembly; and detecting the line shape and the assembly precision of the bridge by using a three-dimensional laser scanning technology. The invention realizes three-dimensional high-precision recording and data analysis of the construction process of the section beam and plays an important role in improving the assembling precision. And scanning the section beams to be assembled after the processing and converting the section beams into models to obtain accurate component errors, performing simulated pre-assembly and assisting in prefabrication and installation, and realizing the application of the three-dimensional laser scanning and BIM technology in improving the assembly precision of the prefabricated section beams.
Description
Technical Field
The invention belongs to the technical field of component prefabrication data identification, and particularly relates to a BIM (building information modeling) -based engineering structure digital pre-assembling method, system and application.
Background
The prefabricated section assembling process is a construction process that the whole beam body of the bridge is divided into a plurality of sections, the sections are prefabricated and processed in a factory and then transported to a construction site, and the sections are integrally assembled into the bridge by applying prestress. Compared with the traditional cast-in-place structure, the prefabricated segmental beam is prefabricated in a factory, so that the requirement on the on-site assembling precision is high. If the production or construction can not meet the precision requirement, the appearance of the sectional beam can not meet the aesthetic requirement, and even the quality and the safety of the sectional beam are affected. Therefore, the mass of the prefabricated segmental beam is the important weight to be controlled before construction. The three-dimensional laser scanning technology has the characteristics of high precision and high sampling speed, can quickly and highly accurately reconstruct a scanning object to obtain original surveying and mapping data, can directly carry out quick reverse three-dimensional data acquisition and model reconstruction from a structure, and embodies a three-dimensional model after actual construction. The BIM technology has the characteristics of high three-dimensional visualization and strong information integration capability, and the BIM model is subjected to three-dimensional modeling through a design drawing and embodies that a three-dimensional model is designed. Under the technical background, in the construction process of prefabricating and assembling the sectional beam, the quality of the sectional beam is controlled and the assembling precision is improved by combining a three-dimensional laser scanning technology and a BIM technology.
The total length of a certain east tetracyclic project route in city is about 17.8km. The project construction mark segment is k26+300-k32+880.604, and the total length is 5740.604m. The main construction structure is as follows: ground trunks, highways, side roads, and the like. Along the line, there are golden city overpass 1, hongbaolu tunnel 1, main bridge 3 and pedestrian overpass 2. A bidirectional 10 lane is used. The Jincheng overpass is positioned at the main line pile number K27+000, and the number of segment beams is 462 in total; the new road bridge is positioned at the main line pile number K30+400, and the number of the segment beams is 416 (wherein the standard segment is 240, and the variable segment is 176).
Although the processing precision of the components can be greatly improved by the factory prefabrication of the bridge sections, the prefabricated sections of the bridge have certain deviation with the design size due to the characteristics of large discreteness of the characteristics of concrete materials and uneven shrinkage creep control, particularly the characteristics that the prefabricated sections of the engineering have transverse prestress and the like, so that the line shape of the bridge is influenced from the source.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) In the prior art, the working efficiency of a member prefabrication construction mode is low, the material cost is high, and the construction quality cannot be effectively guaranteed.
(2) The prior art does not combine a fine three-dimensional laser scanning technology with a BIM technology, has low accuracy of three-dimensional recording and data analysis of a construction process of a sectional beam, and can not provide accurate data support for quality detection of results on a construction site.
Disclosure of Invention
In order to overcome the problems in the related art, the disclosed embodiment of the invention provides a BIM model-based engineering structure digital pre-assembly method, system and application.
The technical scheme is as follows: a BIM model-based engineering structure digital pre-assembly method comprises the following steps:
s1, scanning the section beams to be assembled after machining and converting the section beams into models to obtain accurate component errors;
s2, combining the point cloud model with the BIM model to perform segment beam simulation pre-assembly;
and S3, detecting the line shape and the assembly precision of the bridge by using a three-dimensional laser scanning technology.
In one embodiment, in step S1, scanning and converting the segment beam to be assembled after finishing the processing into the model includes: performing three-dimensional laser scanning on an approaching prefabricated section beam through a three-dimensional laser scanner, acquiring field data and processing field data to obtain single point cloud data of the section beam, converting the point cloud data into a BIM (building information modeling) model, and obtaining an actual entity model through modeling software;
in one embodiment, in step S1, obtaining an accurate component error comprises:
and carrying out coordinate system unification and one-key three-dimensional detection on the obtained BIM model, recording measurement comparison deviation results in real time, carrying out actual deviation numerical value extraction on a plurality of slices, carrying out data comparison analysis to obtain a design and actual entity model comparison analysis report, checking whether the appearance geometric dimension of the segmental beam meets the deviation requirement of design and specification, and checking the prefabrication machining precision.
In one embodiment, in the step S2 of performing the segment beam simulation pre-assembly by combining the point cloud model with the BIM model, the method includes:
carrying out three-dimensional laser scanning on the constructed section beam to obtain a solid point cloud model and carrying out reverse modeling;
unifying coordinates of a BIM design model of the next section of beam and an entity point cloud model obtained by the constructed section of beam in software, and simulating pre-assembly; and checking whether the abutted seam can be fitted.
In one embodiment, in the step S2 of performing the segment beam simulation pre-assembly by combining the point cloud model with the BIM model, the method further includes:
performing deviation analysis according to the pre-assembled model, providing corresponding control or compensation measures according to the analysis result, and setting the pre-camber and the support alignment of the bracket; meanwhile, according to the monitoring result of the construction site on the bridge line type and the support system, the actually occurring line type deviation is analyzed to cause the influence factor of the line type deviation.
In one embodiment, in the step S3, the three-dimensional laser scanning technology is utilized to detect the alignment and assembly precision of the bridge,
and selecting the assembled and erected two-span bridge sections to perform three-dimensional laser scanning and perform bridge linear measurement by combining a BIM (building information modeling) model, and checking the assembling precision.
Another objective of the present invention is to provide a digital pre-assembly system for engineering structure based on BIM model, which comprises:
the component error acquisition module is used for scanning the section beams to be assembled after the processing is finished and converting the section beams into models to obtain accurate component errors;
the segment beam simulation pre-assembly module is used for performing segment beam simulation pre-assembly by combining the point cloud model with the BIM model;
and the assembly precision detection module is used for detecting the bridge line shape and the assembly precision by utilizing a three-dimensional laser scanning technology.
Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the method for digitally pre-assembling an engineering structure based on a BIM model.
Another object of the present invention is to provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the processor is enabled to execute the method for digitally pre-assembling an engineering structure based on a BIM model.
Another object of the present invention is to provide an information data processing terminal, which is configured to provide a user input interface to implement the method for digitally pre-assembling an engineering structure based on a BIM model when the terminal is executed on an electronic device.
By combining all the technical schemes, the invention has the advantages and positive effects that:
first, aiming at the technical problems existing in the prior art and the difficulty in solving the problems, the technical problems to be solved by the technical scheme of the present invention are closely combined with results, data and the like in the research and development process, and how to solve the technical scheme of the present invention is deeply analyzed in detail, and some creative technical effects brought by the solution of the problems are specifically described as follows: the three-dimensional laser scanning technology provided by the invention can be used for carrying out three-dimensional scanning and model reconstruction on the prefabricated section beam transported to a construction site, determining the structural geometric dimension of the prefabricated section beam and inspecting the prefabrication quality of the section beam. Meanwhile, the field entity segment beam can be quickly converted into an entity BIM model and rechecked with a design BIM model, and the entity model and the design are contrasted and analyzed.
Secondly, regarding the technical solution as a whole or from the perspective of products, the technical effects and advantages of the technical solution to be protected by the present invention are specifically described as follows: the concept of prefabricated components is already applied to the field of infrastructure construction, and the mode can improve the working efficiency, save the material cost and ensure the construction quality for the construction stage. The construction is carried out by adopting a member prefabricating mode, and the quality and the precision control of the prefabricated members are particularly important. The invention mainly analyzes the exploration application of the three-dimensional laser scanning technology combined with the BIM technology in improving the prefabrication and assembly precision of the segmental beam. The Jincheng interchange segmental beam is taken as a research carrier for an east four-ring project in Zhengzhou city, a three-dimensional laser scanning technology is analyzed in detail and combined with a BIM technology, three-dimensional high-precision recording and data analysis of the construction process of the segmental beam are realized, and the method plays an important role in improving the assembling precision. And scanning the section beams to be assembled after the processing and converting the section beams into models to obtain accurate component errors, and performing simulated pre-assembly and auxiliary pre-assembly installation. The method mainly comprises BIM modeling, implementation of three-dimensional laser scanning, splicing of three-dimensional point cloud data, reverse modeling, simulation pre-assembly, segment beam and construction site result quality detection and the like, and application of the combination of the three-dimensional laser scanning and BIM technology in improving the assembly precision of the prefabricated segment beam is explored and researched.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a flow chart of a BIM model-based engineering structure digital pre-assembly method provided by the embodiment of the invention;
FIG. 2 is a schematic diagram of an engineering structure digital pre-assembly system based on a BIM model according to an embodiment of the present invention;
FIG. 3 is a flow chart of construction quality monitoring combining three-dimensional laser scanning and BIM technology provided by the embodiment of the invention;
in the figure: 1. a component error acquisition module; 2. the section beam simulation pre-assembly module; 3. and assembling a precision detection module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
1. Illustrative examples are illustrated:
example 1
As shown in fig. 1, an embodiment of the present invention provides a method for digitally pre-assembling an engineering structure based on a BIM model, including the following steps:
s101, scanning the segment beam to be assembled after the processing and converting the segment beam into a model to obtain an accurate component error;
s102, combining the point cloud model with a BIM model to perform segment beam simulation pre-assembly;
and S103, detecting the line shape and the assembly precision of the bridge by using a three-dimensional laser scanning technology.
In one embodiment, in step S1, scanning and converting the segment beam to be assembled after finishing the processing comprises: performing three-dimensional laser scanning on an approaching prefabricated section beam through a three-dimensional laser scanner, acquiring field data and processing field data to obtain section beam monomer point cloud data, converting the point cloud data into a BIM (building information modeling) model, and obtaining an actual entity model through modeling software;
in a preferred embodiment, in step S101, obtaining an accurate component error comprises:
and carrying out coordinate system unification and one-key three-dimensional detection on the obtained BIM model, recording measurement comparison deviation results in real time, carrying out actual deviation numerical value extraction on a plurality of slices, carrying out data comparison analysis to obtain a design and actual entity model comparison analysis report, checking whether the appearance geometric dimension of the segmental beam meets the deviation requirement of design and specification, and checking the prefabrication machining precision.
In a preferred embodiment, in the step S102, the pre-assembling of the segment beam simulation by combining the point cloud model with the BIM model includes:
carrying out three-dimensional laser scanning on the constructed section beam to obtain an entity point cloud model and carrying out reverse modeling;
unifying coordinates of a BIM design model of the next section of beam and an entity point cloud model obtained by the constructed section of beam in software, and simulating pre-assembly; and checking whether the abutted seam can be fitted.
In a preferred embodiment, in the step S102 of performing the segment beam simulation pre-assembly by combining the point cloud model with the BIM model, the method further includes:
performing deviation analysis according to the pre-assembled model, providing corresponding control or compensation measures according to the analysis result, and setting the pre-camber and the support alignment of the bracket; meanwhile, according to the monitoring result of the construction site on the bridge line type and the support system, the actually occurring line type deviation is analyzed to cause the influence factor of the line type deviation.
In a preferred embodiment, in step S103, using three-dimensional laser scanning technology to detect the alignment and assembly precision of the bridge,
and selecting the assembled and erected two-span segmental beam to perform three-dimensional laser scanning and combine with a BIM (building information modeling) model to perform bridge linear measurement, and checking the assembling precision.
As shown in fig. 2, an embodiment of the present invention provides a digital pre-assembly system for engineering structures based on a BIM model, including:
the component error acquisition module 1 is used for scanning the segment beam to be assembled after the processing and converting the segment beam into a model to obtain an accurate component error;
the segment beam simulation pre-assembly module 2 is used for performing segment beam simulation pre-assembly by combining the point cloud model with the BIM model;
and the assembly precision detection module 3 is used for detecting the bridge line shape and the assembly precision by utilizing a three-dimensional laser scanning technology.
Example 2
The BIM (Building Information Model) technology is a data Model based on integration of various related Information in a three-dimensional digital engineering project. The application of the BIM technology in quality management mainly comprises drawing verification, optimized design, three-dimensional visualization intersection and the like.
According to the BIM model standard of a company bridge, when a structure is modeled in three dimensions, the depth of the model is required to meet the BIM application requirement of a project, and different stages correspond to different depths. The golden city interchange structure is subjected to three-dimensional modeling, the bridge line shape is guaranteed, and the model precision is not deviated from a drawing. And related engineering information such as elevation point coordinates, engineering quantity and the like can be extracted through the model.
The three-dimensional laser scanning technology is also called as a real scene replication technology, and obtains spatial three-dimensional coordinate information of a measured object by using a laser beam and a laser signal reflected by the measured object. Compared with the traditional single-point distributed measurement method, the technology adopts a continuous integral data acquisition mode, avoids the introduction of human errors and time errors, is suitable for any complex field environment and objects in an automatic acquisition mode, and obtains point cloud data through scanning, so that a three-dimensional model can be rapidly reconstructed. The point cloud data can be imported into BIM software such as Sketchup, civil3D, revit and the like for subsequent engineering design. At present, three-dimensional laser scanning is mainly applied to mapping engineering, industrial measurement, cultural relic protection, ancient architecture transformation, natural disaster investigation and the like.
Trimble TX5 is selected for three-dimensional laser scanning, and the parameters of a scanner are as follows: the measurement speed is up to 976,000 points per second, and the measurement range is 130 meters.
Trimble TX5 three-dimensional laser scanning is light, small and convenient to carry, the size is only 240x200x100 mm, the weight is only 5.2 kg, data are stored on an SD card, and the data can be conveniently and safely transmitted to a computer. The data is processed and registered with SCENE software and can be seamlessly imported into the Tianbao RealWorks software to produce a final result, such as a test result, a measurement result, or a three-dimensional model. The data can also be transmitted to a three-dimensional CAD software package and provided to third-party design software. The operation can be clearly and simply carried out through a simple touch screen interface of Trimble TX 5. The steps required for setting scanning parameters, managing items and scanning are intuitive and easy to learn. This greatly reduces the time required for high efficiency.
In the application of three-dimensional laser scanning technology, the method comprises the following steps:
(1) Point cloud data collection
The single-piece segmented beam prefabricated by the factory and brought into the field is scanned three-dimensionally by a Trimble TX5 three-dimensional laser scanner. And (3) finishing subsequent data splicing and preprocessing in a target pasting mode for any standing mode, wherein the single structure scans 24 stations in total and takes 6 hours.
The instrument rapidly scans the section beams by emitting laser pulses, transmits and receives spatial information of the section beams back through a slow reflection principle, and carries out real point cloud of an object through an internal operation stroke, wherein the point cloud information contains and retains coordinate information, RGB (red, green and blue) and gray values of the object.
(2) Point cloud data preprocessing
And carrying out data splicing, data elimination, data simplification, denoising and other processing on the point cloud data through professional Trimble RealWorks interior processing software.
Data splicing: due to the large volume of the segmental beam body, the scanning cannot be completed at one time. And scanning of different measuring stations is required for multiple times, and data of each measuring station are in different coordinate systems, so that coordinates need to be unified and data splicing is carried out.
Data elimination: scanning data outside the single segment beam is invalid data and needs to be deleted, and the process of deleting the invalid data is called data elimination.
Data simplification: the point cloud data is huge data, and therefore data simplification processing is required without affecting accuracy, which is called data reduction.
Denoising: the inevitable noise spots are caused by environmental factors such as reflection of dust in the air. The removal of these inevitable noise points by software is called denoising.
Furthermore, BIM inverse modeling includes:
and importing the point cloud data into Revit modeling software for three-dimensional reverse modeling, wherein Revit supports the import of a plurality of point cloud data formats, exporting the segment beam point cloud data subjected to field processing in RealWorks in an rcs format, and importing the point cloud file into the Revit software. And (4) slicing in Revit to obtain plane contour lines of the segment beam such as flat, vertical and section, and creating a BIM (building information modeling) model of the solid segment beam.
The engineering structure digital pre-assembly method based on the BIM (application of three-dimensional laser scanning and BIM technology in improving assembly precision of a prefabricated segmental beam) provided by the embodiment of the invention comprises the following steps:
1. and (3) detecting the entrance quality of the prefabricated section beam, as shown in a flow chart of combining three-dimensional laser scanning with BIM technology construction quality monitoring in figure 2.
The three-dimensional laser scanning technology can be used for accurately scanning the prefabricated sections transported to a construction site, determining the structural size of the prefabricated sections, checking the prefabricated quality of components, and creating a bridge BIM model according to the structural size, so that engineering management is facilitated. The method comprises the steps of carrying out three-dimensional laser scanning on an approaching prefabricated section beam through a three-dimensional laser scanner, acquiring field data and processing field data to obtain section beam monomer point cloud data, converting the point cloud data into a BIM model, and obtaining the BIM through modeling software together with a design drawing.
The model carries out coordinate system unified, one-key three-dimensional detection, measurement and comparison deviation results are recorded in real time, a plurality of slices are subjected to actual deviation numerical value extraction, data comparison analysis is carried out, a design and actual model comparison analysis report is obtained, whether the external geometric dimension of the section beam meets the deviation requirement of design and specification is checked, the prefabrication machining precision of the section beam is checked, and the section beam assembling precision is guaranteed to be improved.
Through three-dimensional laser scanning and comparative analysis of four different segment beam monomers on site, the three-dimensional point cloud of an actual segment beam is compared and analyzed with a designed BIM model, the deviation value of the final result is maximally 1mm, the surface of concrete is smooth, no honeycomb pitted surface exists, the quality is good, as actually produced objects have more structural objects than the BIM model, the structural bodies are not used for deviation calculation, the results meet the requirements of design and standard deviation, and the quality of the prefabricated segment beam is good.
2. Point cloud model and BIM model combined segment beam simulation pre-assembly
Besides the stage prefabrication precision, factors influencing the assembling precision in the assembling process of the bridge sections are more complex. Firstly, the prefabricated segment is long in age, while the zero block and the wet joint are cast in situ, so that the prefabricated segment has large age difference with the prefabricated segment, and the concrete shrinkage and creep are inconsistent; longitudinal pre-stressed tension will cause deformation of the structure; the settlement of the foundation and the deformation of the lower support can also influence the assembly line shape, and both influence the assembly precision of the next segmental beam.
Before assembling the No. 1 block section beam, three-dimensional laser scanning is carried out on the constructed zero block to obtain a solid point cloud model and then the solid point cloud model is carried out
And (5) performing reverse modeling. And (3) unifying the BIM design model of the No. 1 block and the zero block entity model in the revit software, and simulating pre-assembly. And (5) checking whether the 1 # block and the 0 # block can be matched or not.
And performing deviation analysis according to the pre-assembled model, providing corresponding control or compensation measures according to an analysis result, setting the pre-camber of the support, positioning the support and the like. Meanwhile, according to the monitoring result of the construction site on the bridge line type and the support system, the actually occurring line type deviation is also analyzed, and the influence factors causing the line type deviation are searched.
3. Bridge alignment and assembly precision detection by three-dimensional laser scanning technology
Precision control and linear control in the assembling process of the sectional beams are the most critical and difficult links in the construction process and determine success or failure of engineering construction. The assembling process is that on the basis of accurate prefabrication and simulated pre-assembling of the segments, reasonable hoisting and attitude adjusting technologies are adopted to enable the segments to be temporarily positioned and mutually accurately matched and connected, and the three-dimensional laser scanning and the BIM model are combined to carry out accurate and rapid assembling in cooperation with a segment prefabrication support assembling construction scheme.
The three-dimensional laser scanning technology can be used for scanning the prefabricated sections and the whole bridge structure, determining the bridge line shape, checking the construction and assembly precision, and accordingly, the obtained BIM model can also become a reference information model for later-stage bridge management and maintenance. In addition, the three-dimensional laser scanning technology can be adopted to carry out linear measurement in the construction process.
The invention selects the assembled and erected two-span section beam to carry out three-dimensional laser scanning and combines with a BIM model to carry out bridge linear measurement, and verifies the assembling precision.
In general. The three-dimensional laser scanning technology is applied to the simulated pre-assembly of the prefabricated section beam, and the problems of small information acquisition amount, single comparison method, low measurement precision, large workload and the like of the conventional simulated pre-assembly data are solved; compared with the solid pre-assembly of the sectional beams, the method has more outstanding advantages in the aspects of saving time, labor and using mechanical equipment.
The invention improves the prefabrication and assembly precision of the east four-ring project section beam in a certain city based on the organic combination of three-dimensional laser scanning and the BIM technology, and solves the problems of field section beam entrance quality detection, bridge linear measurement, assembly precision verification and the like. With the gradual increase of future extra-large projects, the three-dimensional laser scanning technology combined with the BIM technology can be applied more and more in engineering quality management, and plays a greater role in improving the project construction management level.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
For the information interaction, execution process and other contents between the above-mentioned devices/units, because the embodiments of the method of the present invention are based on the same concept, the specific functions and technical effects thereof can be referred to the method embodiments specifically, and are not described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present invention. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
2. The application example is as follows:
an embodiment of the present invention further provides a computer device, where the computer device includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps of any of the various method embodiments described above when executing the computer program.
Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the above method embodiments may be implemented.
The embodiment of the present invention further provides an information data processing terminal, where the information data processing terminal is configured to provide a user input interface to implement the steps in the above method embodiments when implemented on an electronic device, and the information data processing terminal is not limited to a mobile phone, a computer, or a switch.
The embodiment of the present invention further provides a server, where the server is configured to provide a user input interface to implement the steps in the above method embodiments when implemented on an electronic device.
Embodiments of the present invention provide a computer program product, which, when running on an electronic device, enables the electronic device to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may be implemented by a computer program, which may be stored in a computer-readable storage medium and used for instructing related hardware to implement the steps of the embodiments of the method according to the embodiments of the present invention. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer memory, read-only memory (ROM), random Access Memory (RAM), electrical carrier signal, telecommunications signal, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. A BIM model-based engineering structure digital pre-assembly method is characterized by comprising the following steps:
s1, scanning the section beams to be assembled after machining and converting the section beams into models to obtain accurate component errors;
s2, combining the point cloud model with a BIM model to perform segment beam simulation pre-assembly;
and S3, detecting the line shape and the assembly precision of the bridge by using a three-dimensional laser scanning technology.
2. The BIM model-based engineering structure digital pre-assembly method of claim 1, wherein in the step S1, scanning and converting the segment beams to be assembled after being processed into the model comprises: the method comprises the steps of performing three-dimensional laser scanning on an approaching prefabricated section beam through a three-dimensional laser scanner, acquiring field data and processing field data to obtain single point cloud data of the section beam, converting the point cloud data into a BIM (building information modeling) model, and obtaining an actual entity model through modeling software.
3. The BIM-model-based engineering structure digital pre-assembly method according to claim 2, wherein in the step S1, obtaining accurate component errors comprises:
and carrying out coordinate system unification and one-key three-dimensional detection on the obtained BIM model, recording measurement comparison deviation results in real time, carrying out actual deviation numerical value extraction on a plurality of slices, carrying out data comparison analysis to obtain a design and actual entity model comparison analysis report, checking whether the appearance geometric dimension of the segmental beam meets the deviation requirement of design and specification, and checking the prefabrication machining precision.
4. The BIM-model-based engineering structure digital pre-assembly method of claim 1, wherein in the step S2, the point cloud model and the BIM model are combined to perform segment beam simulation pre-assembly, and the method comprises the following steps:
carrying out three-dimensional laser scanning on the constructed section beam to obtain an entity point cloud model and carrying out reverse modeling;
unifying coordinates of a BIM design model of the next section of beam and an entity point cloud model obtained by the constructed section of beam in software, and simulating pre-assembly; and checking whether the abutted seam can be fitted.
5. The BIM-model-based engineering structure digital pre-assembly method according to claim 1, wherein in the step S2, the step of combining the point cloud model and the BIM model to perform segment beam simulation pre-assembly further comprises the steps of:
performing deviation analysis according to the pre-assembled model, providing corresponding control or compensation measures according to the analysis result, and setting the pre-camber and the support alignment of the bracket; meanwhile, according to the monitoring result of the construction site on the bridge line type and the support system, the actually occurring line type deviation is analyzed to cause the influence factor of the line type deviation.
6. The BIM model-based engineering structure digital pre-assembly method as claimed in claim 1, wherein in step S3, the detection of bridge alignment and assembly precision by using three-dimensional laser scanning technology comprises:
and selecting the assembled and erected two-span bridge sections to perform three-dimensional laser scanning and perform bridge linear measurement by combining a BIM (building information modeling) model, and checking the assembling precision.
7. A system for realizing the BIM model-based engineering structure digital pre-assembly method of any one of claims 1 to 6, wherein the BIM model-based engineering structure digital pre-assembly system comprises:
the component error acquisition module (1) is used for scanning the section beams to be assembled after being processed and converting the section beams into models to obtain accurate component errors;
the segment beam simulation pre-assembly module (2) is used for performing segment beam simulation pre-assembly by combining the point cloud model with the BIM model;
and the assembly precision detection module (3) is used for detecting the line shape and the assembly precision of the bridge by utilizing a three-dimensional laser scanning technology.
8. A computer device, characterized in that the computer device comprises a memory and a processor, the memory stores a computer program, when the computer program is executed by the processor, the processor is caused to execute the method for digitized pre-assembly of engineering structure based on BIM model according to any one of claims 1 to 6.
9. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, causes the processor to execute the method for digital pre-assembly of an engineering structure based on a BIM model according to any one of claims 1 to 6.
10. An information data processing terminal, wherein the information data processing terminal is configured to provide a user input interface to implement the BIM model-based engineering structure digital pre-assembly method of any one of claims 1 to 6 when implemented on an electronic device.
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