A segmental beam assembly construction monitoring method based on three-dimensional laser scanning and BIM technology

Abstract

The application discloses a kind of based on three-dimensional laser scanning and BIM technology's segmental beam assembly construction monitoring method, steps are: establishing segmental beam building information (BIM) model, the point cloud data model of each assembly step is established by three-dimensional laser scanning, the point cloud data model of each assembly step is compared with BIM model, verifies construction accuracy, and according to construction accuracy, the assembly of segmental beam is adjusted.The application applies three-dimensional laser scanning and BIM technology to segmental beam assembly construction monitoring, and carries out fine detection and monitoring to segmental beam assembly construction.The monitoring method of the application realizes the precision of longitudinal bridge direction and horizontal bridge direction geometric dimension after the assembly of segmental beam, beam segment top surface center line deviation, beam segment top surface longitudinal slope and transverse slope, beam segment top surface elevation and joint misalignment, and according to detection result, the assembly of segmental beam is adjusted, avoids construction error accumulation, guarantees the precision and quality of segmental beam assembly construction.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge engineering, and relates to a segmental beam assembly construction monitoring method, in particular to a segmental beam assembly construction monitoring method based on three-dimensional laser scanning and BIM technology. BACKGROUND

[0002] For a prefabricated assembly bridge, the precision control of segmental beam assembly construction is an important technical measure to guarantee the construction quality and the overall assembly linear of the main beam.

[0003] The traditional segmental beam assembly construction precision control method mainly uses total station, level and steel tape and other measuring equipment to measure and control individual control points of the segmental beam. This monitoring method can only roughly monitor the top surface and elevation of the segmental beam, and cannot quickly and accurately measure and control the linear and elevation of each position of the segmental beam top surface, which is not comprehensive and perfect for the assembly precision control of the segmental beam.

[0004] Therefore, it is necessary to develop a method capable of fine construction monitoring of segmental beam assembly, rapid, comprehensive and accurate detection of segmental beam assembly construction precision, and proposing a precision control scheme according to the detection results. SUMMARY

[0005] The present application aims to avoid the shortcomings of the existing construction monitoring technology, and provides a segmental beam assembly construction monitoring method based on three-dimensional laser scanning and BIM technology.

[0006] The present application uses three-dimensional laser scanning and BIM technology to establish a segmental beam assembly construction monitoring method, detects and monitors the segmental beam assembly construction, which can greatly improve the detection density, efficiency and accuracy, and makes the construction monitoring measures more comprehensive and accurate.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0008] A segmental beam assembly construction monitoring method based on three-dimensional laser scanning and BIM technology, comprising the following steps:

[0009] a. According to the design drawing, establish all segmental beam building information (BIM) model and full bridge building information model;

[0010] b. Install No. 0 beam segment and No. 1 beam segment on the top of the first pier and the second pier of the first span respectively, and introduce the leveling point to the top surface of No. 0 beam segment and No. 1 beam segment. Use a three-dimensional laser scanner to scan the installed No. 0 beam segment and No. 1 beam segment, obtain the point cloud data of No. 0 beam segment and No. 1 beam segment, and establish the point cloud data model of No. 0 beam segment and No. 1 beam segment;

[0011] c. Comparing the point cloud data model of the No. 0 and No. 1 beam segments with the BIM model of the corresponding beam segments and the BIM model of the whole bridge, verifying the installation accuracy and adjusting the positions of the No. 0 and No. 1 beam segments so that the installation accuracy meets the design requirements;

[0012] d. Hoisting all the assembled beam segments into place, lifting the No. 2 and No. 3 beam segments to the design elevation and assembling them, scanning the assembled No. 2 and No. 3 beam segments using the three-dimensional laser scanner, obtaining the point cloud data of the assembled No. 2 and No. 3 beam segments, and establishing the point cloud data model of the assembled No. 2 and No. 3 beam segments;

[0013] e. Comparing the point cloud data model of the assembled No. 2 and No. 3 beam segments with the BIM model of the corresponding assembled beam segments and the BIM model of the whole bridge, verifying the assembly accuracy and adjusting the positions of the No. 2 and No. 3 beam segments so that the assembly accuracy meets the design requirements;

[0014] f. According to the assembly accuracy of the No. 2 and No. 3 beam segments, determining the assembly and adjustment scheme of the No. 4 beam segment, lifting the No. 4 beam segment to the design elevation and assembling it, scanning the No. 2, No. 3 and No. 4 beam segments using the three-dimensional laser scanner, establishing the point cloud data model of the assembled beam segments, comparing it with the BIM model of the corresponding assembled beam segments and the BIM model of the whole bridge, verifying the assembly accuracy and adjusting the position of the No. 4 beam segment so that the assembly accuracy meets the design requirements. This process is repeated until the assembly of the last beam segment is completed;

[0015] g. Completing the cast-in-place joint between the pier top beam segment and the assembled beam segment, scanning the first span segment beam using the three-dimensional laser scanner, establishing the point cloud data model of the assembled first span segment beam, and comparing it with the BIM model of the whole bridge, verifying the assembly accuracy and adjusting the position of the beam segment so that the assembly accuracy meets the design requirements, and completing the assembly construction of the first span segment beam;

[0016] h. This process is repeated to complete the assembly construction of the other spans of the whole bridge.

[0017] Further preferably, in step a, the segment beam whole bridge building information model is a BIM model containing segment beam elevation information.

[0018] Further preferably, in step b, the setting position of the leveling point is the position of the geometric center of the top surface of the No. 0 and No. 1 beam segments, and the leveling point is identified by a 5mm wide and 50mm long cross line painted with red paint; the point cloud data model contains the elevation data of the introduced leveling points on the top surfaces of the No. 0 and No. 1 beam segments.

[0019] Further preferably, in step c, the installation accuracy mainly refers to the longitudinal and transverse geometric dimension accuracy of the 0th and 1st beam segments, the center line deviation accuracy of the top surface of the beam segment, the longitudinal and transverse slope accuracy of the top surface of the beam segment, and the elevation accuracy of the top surface of the beam segment.

[0020] Further preferably, in steps d, e, f and g, the point cloud data model comprises the elevation data of the introduced top surface leveling point of the 0th or 1st beam segment.

[0021] Further preferably, in steps e, f and g, the assembly accuracy mainly refers to the longitudinal and transverse geometric dimension accuracy after assembly, the center line deviation accuracy of the top surface of the beam segment, the longitudinal and transverse slope accuracy of the top surface of the beam segment, the elevation accuracy of the top surface of the beam segment, and the accuracy of the joint misalignment.

[0022] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0023] 1. The present application provides a method for detecting the geometric size of a segment beam after assembly, which uses a three-dimensional laser scanner to scan the assembled segment beam, so as to realize fast, comprehensive and accurate detection of the geometric size of the segment beam after assembly.

[0024] 2. The present application provides a method for detecting the elevation of a segment beam after assembly, which introduces a leveling point to the top surface of the segment beam and uses a three-dimensional laser scanner to scan the assembled segment beam, so as to realize detection of the elevation of any point on the top surface of the segment beam after assembly.

[0025] 3. The present application provides a method for monitoring the assembly accuracy of a segment beam using three-dimensional laser scanning and BIM technology, which compares the point cloud data model scanned by the three-dimensional laser scanner with the BIM model of the segment beam, so as to clearly know the assembly accuracy of each detail and determine whether the assembly of the next segment beam needs to be adjusted and the size and method of the adjustment, thereby realizing monitoring of the assembly accuracy of the segment beam. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a schematic diagram of segment beam assembly construction monitoring of the present application.

[0027] In the figure, 0-10 is the 0th to 10th segment beam; 1-1 is the first pier, 1-2 is the second pier, and 1-3 is the third pier; 2-1 is the main beam of the built bridge; and 3-1 is a bridge erecting machine. DETAILED DESCRIPTION

[0028] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading this invention, any modifications of the invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0029] Example:

[0030] As attached Figure 1 As shown, this invention provides a monitoring method for the construction of segmental beam assembly based on three-dimensional laser scanning and BIM technology, which includes the following contents and steps:

[0031] a. Based on the design drawings, establish the Building Information Model (BIM) model of segmental beams 0-10 and the building information model of the entire bridge. The bridge BIM model contains information on the location, geometric dimensions and elevation of the segmental beams.

[0032] b. Install beam segment 1 and beam segment 0 on the top of pier 1-1 and pier 1-2 respectively, and introduce benchmarks to the top surfaces of beam segments 0 and 1. The benchmarks are set at the geometric center of the top surface of beam segments 0 and 1, and are marked with a 5mm wide and 50mm long cross line in red paint. Use a 3D laser scanner to scan the installed beam segments 0 and 1 to obtain point cloud data of beam segments 0 and 1, and establish point cloud data models of beam segments 0 and 1. The point cloud data models include the elevation data of the benchmarks introduced on the top surfaces of beam segments 0 and 1.

[0033] c. Compare the point cloud data models of beam segments 0 and 1 with the corresponding BIM models and the full bridge BIM model to verify the installation accuracy. Installation accuracy mainly refers to the longitudinal and transverse geometric dimensional accuracy, centerline deviation accuracy of the beam segment top surface, longitudinal and transverse slope accuracy of the beam segment top surface, and elevation accuracy of the beam segment top surface. If the installation accuracy does not meet the design requirements, adjust the positions of beam segments 0 and 1 to ensure the installation accuracy meets the design requirements.

[0034] d. Hoist all beam segments 2-10 into place; lift beam segments 2 and 3 to the design elevation and assemble them. Use a 3D laser scanner to scan the assembled beam segments 2 and 3 to obtain point cloud data of the assembled beam segments 2 and 3, and establish point cloud data models of the assembled beam segments 2 and 3. During scanning, ensure that the top surface leveling point of beam segment 1 can be scanned so that the point cloud data model includes the elevation data of the top surface leveling point of beam segment 1.

[0035] e、compare the point cloud data model of the assembled No. 2 and No. 3 beam segments with the BIM model of the corresponding assembled beam segments and the BIM model of the whole bridge, and verify the assembly accuracy. The assembly accuracy mainly refers to the longitudinal and transverse geometric dimension accuracy of the assembled No. 2 and No. 3 beam segments, the center line deviation accuracy of the top surface of the beam segments, the longitudinal and transverse slope accuracy of the top surface of the beam segments, the elevation accuracy of the top surface of the beam segments, and the accuracy of the joint misalignment. If the assembly accuracy does not meet the design requirements, adjust the positions of the No. 2 and No. 3 beam segments to make the assembly accuracy meet the design requirements;

[0036] f、determine the assembly and adjustment scheme of the No. 4 beam segment according to the assembly accuracy of the No. 2 and No. 3 beam segments, lift the No. 4 beam segment to the design elevation and assemble it, and use the three-dimensional laser scanner to scan the No. 2, No. 3 and No. 4 beam segments to establish the point cloud data model after assembly. When scanning, the top surface leveling point of the No. 1 beam segment should be ensured to be scanned, so that the point cloud data model contains the elevation data of the introduced top surface leveling point of the No. 1 beam segment. Compare the point cloud data model with the BIM model of the corresponding assembled beam segments and the BIM model of the whole bridge to verify the assembly accuracy. If the assembly accuracy does not meet the design requirements, adjust the position of the No. 4 beam segment to make the assembly accuracy meet the design requirements. Repeat the above steps until the assembly of the No. 10 beam segment is completed;

[0037] g、complete the cast-in-place joint between the pier top beam segment and the assembled beam segment, use the three-dimensional laser scanner to scan the first span segment beam to establish the point cloud data model after assembly. When scanning, the top surface leveling point of the No. 1 beam segment should be ensured to be scanned, so that the point cloud data model contains the elevation data of the introduced top surface leveling point of the No. 1 beam segment. Compare the point cloud data model with the BIM model of the whole bridge to verify the assembly accuracy. The assembly accuracy mainly refers to the longitudinal and transverse geometric dimension accuracy of the assembled first span segment beam, the center line deviation accuracy of the top surface of the beam segments, the longitudinal and transverse slope accuracy of the top surface of the beam segments, the elevation accuracy of the top surface of the beam segments, and the accuracy of the joint misalignment. If the assembly accuracy does not meet the design requirements, adjust the position of the beam segment to make the assembly accuracy meet the design requirements, and complete the assembly construction of the first span segment beam;

[0038] h、repeat the above steps to complete the assembly construction of the other spans of the whole bridge.

[0039] Although the present application has been disclosed with reference to the preferred embodiments above, it is not intended to limit the present application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the definition of the claims.

Claims

1. A monitoring method for segmental beam assembly construction based on three-dimensional laser scanning and BIM technology, characterized in that, The method comprises the following steps: a. According to the design drawing, a segmental beam all beam segment building information (BIM) model and a full-bridge building information model are established; the segmental beam full-bridge building information model is a BIM model containing segmental beam elevation information; b. A No. 0 beam segment and a No. 1 beam segment are respectively installed on the top of the first pier and the second pier of the first span, and a leveling point is introduced to the top surface of the No. 0 beam segment and the No. 1 beam segment; a three-dimensional laser scanner is used to scan the installed No. 0 beam segment and No. 1 beam segment to obtain No. 0 beam segment and No. 1 beam segment point cloud data, and a No. 0 beam segment and No. 1 beam segment point cloud data model is established; the leveling point is marked by drawing a 5mm wide and 50mm long cross line with red paint on the geometric center of the top surface of the No. 0 and No. 1 beam segments; the point cloud data model contains the elevation data of the introduced leveling point on the top surface of the No. 0 beam segment and the No. 1 beam segment; c. The point cloud data model of the No. 0 beam segment and the No. 1 beam segment is compared with the corresponding beam segment BIM model and the full-bridge BIM model to verify the installation accuracy and adjust the position of the No. 0 beam segment and the No. 1 beam segment, so that the installation accuracy meets the design requirements; the installation accuracy refers to the longitudinal and transverse geometric dimension accuracy of the No. 0 beam segment and the No. 1 beam segment, the center line deviation accuracy of the beam segment top surface, the longitudinal and transverse slope accuracy of the beam segment top surface, and the elevation accuracy of the beam segment top surface; d. All assembled beam segments are hoisted into position; the No. 2 beam segment and the No. 3 beam segment are lifted to the design elevation and assembled, a three-dimensional laser scanner is used to scan the assembled No. 2 beam segment and No. 3 beam segment to obtain the point cloud data of the assembled No. 2 beam segment and No. 3 beam segment, and a point cloud data model of the assembled No. 2 beam segment and No. 3 beam segment is established; e. The point cloud data model of the assembled No. 2 beam segment and No. 3 beam segment is compared with the corresponding beam segment BIM model and the full-bridge BIM model to verify the assembly accuracy and adjust the position of the No. 2 beam segment and the No. 3 beam segment, so that the assembly accuracy meets the design requirements; f. According to the assembly accuracy of the No. 2 beam segment and the No. 3 beam segment, the assembly and adjustment scheme of the No. 4 beam segment is determined, the No. 4 beam segment is lifted to the design elevation and assembled, a three-dimensional laser scanner is used to scan the No. 2, No. 3 and No. 4 beam segments to establish a point cloud data model of the assembled beam segments, which is compared with the corresponding beam segment BIM model and the full-bridge BIM model to verify the assembly accuracy and adjust the position of the No. 4 beam segment, so that the assembly accuracy meets the design requirements; this process is repeated until the last piece of beam segment is assembled; g. The cast-in-place joint between the pier top beam segment and the assembled beam segment is completed, a three-dimensional laser scanner is used to scan the first span segmental beam to establish a point cloud data model of the assembled first span segmental beam, which is compared with the full-bridge BIM model to verify the assembly accuracy and adjust the position of the beam segment, so that the assembly accuracy meets the design requirements, and the assembly construction of the first span segmental beam is completed; h. This process is repeated to complete the assembly construction of other spans of the full-bridge.

2. The monitoring method of segmental beam assembly construction based on three-dimensional laser scanning and BIM technology according to claim 1, characterized in that: In steps d, e, f and g, the point cloud data model contains the elevation data of the introduced leveling point on the top surface of the No. 0 beam segment or the No. 1 beam segment. 3.The segmental beam assembly construction monitoring method based on three-dimensional laser scanning and BIM technology according to claim 1, characterized in that: In step e, step f and step g, the assembling precision refers to the longitudinal and transverse geometric dimension precision, the precision of the center line deviation of the top surface of the beam segment, the precision of the longitudinal and transverse slope of the top surface of the beam segment, the precision of the elevation of the top surface of the beam segment, and the precision of the joint misalignment.

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