CN-122023706-A - BIM-based heavy-gradient roof construction method and system

CN122023706ACN 122023706 ACN122023706 ACN 122023706ACN-122023706-A

Abstract

The invention relates to the technical field of building construction, in particular to a construction method and a construction system of a heavy-gradient roof based on BIM, which are characterized in that a BIM model is built according to design parameters of the heavy-gradient roof, point cloud data corresponding to the local heavy-gradient roof is scanned in real time, the point cloud data and the BIM model are matched and overlapped under unified coordinates, the point cloud data are thinned according to the point cloud thinning proportion to determine actual measuring points, the normal distance between each actual measuring point and the surface of the BIM model is calculated, the out-of-tolerance actual measuring point which is positioned outside the allowable deviation value is determined, a deviation chromatogram is generated according to the normal distance corresponding to the actual measuring point, whether the construction of the high-gradient roof meets the standard is judged based on the out-of-tolerance rate, the scale factors of the scale registration are adjusted, each geometric coordinate point of the BIM model is adjusted, the allowable deviation value is adjusted, and the point cloud dilution proportion is reduced. The method effectively realizes real-time accurate monitoring of the construction process of the heavy-gradient roof, and effectively improves the construction efficiency of the heavy-gradient roof.

Inventors

JIN CHAO
LI CHANGQING
Li Woqian
Qiu Junan
SUN ZHIYING
DUAN RUI
Liu Leipu
Xuan Lishuai
WU JIAHUI
YANG NENG
MO RENZHENG
WEN JIAHAI

Assignees

中国建筑第五工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (10)

1. The construction method of the high-gradient roof based on BIM is characterized by comprising the following steps: Constructing a BIM model according to design parameters of the high-gradient roof, and performing collision check on the constructed model to optimize the model; scanning the constructed local heavy-gradient roof in real time to acquire corresponding point cloud data; registering the coordinates of the point cloud data and the BIM model uniformly and proportionally, and matching and superposing the coordinates under the uniform coordinates; thinning the point cloud data according to the point cloud thinning proportion to determine an actual measuring point; Calculating the normal distance between each actual measuring point and the surface of the BIM model, and determining out-of-tolerance actual measuring points outside the allowable deviation value; Generating a deviation chromatogram according to the normal distance corresponding to the actual measuring point; Counting the ratio of the number of out-of-tolerance actual measuring points to the total number of actual measuring points, and recording the obtained ratio as out-of-tolerance rate; Judging whether the construction of the high-gradient roof meets the standard or not based on the out-of-tolerance ratio; The periodic judgment of the construction of the roof with the large gradient is completed according to the judgment result, Or, generating a corresponding processing instruction; Adjusting the scale factor of the proportion registration based on average deviation, adjusting each geometrical coordinate point of the BIM based on temperature difference, adjusting the allowable deviation value based on the out-of-tolerance ratio, reducing the point cloud thinning proportion based on the increasing degree of the allowable deviation value, and generating and issuing a component deviation real-time correction instruction sheet.
2. The BIM-based high slope roof construction method according to claim 1, wherein the process of determining whether the high slope roof construction meets the standard based on the out-of-tolerance ratio includes: when the super-differential rate is smaller than or equal to a preset super-differential rate, judging that the construction of the heavy-slope roof meets the standard, finishing the periodic judgment of the construction of the heavy-slope roof, and judging the construction of the heavy-slope roof in the next period; And when the out-of-tolerance rate is larger than the preset out-of-tolerance rate, judging that the construction of the high-gradient roof does not meet the standard, and judging whether the scale factors of the scale registration meet the standard or not based on the normal distance of the out-of-tolerance actual measuring point.
3. The BIM-based high slope roof construction method according to claim 2, wherein the process of determining whether the scale factor of the scale registration meets a criterion based on the normal distance of the out-of-tolerance actual measurement point includes: calculating the average value of the normal distance of each out-of-tolerance actual measurement point, and recording the calculated average value as an out-of-tolerance average value; determining the absolute value of the out-of-tolerance average value, and recording the obtained absolute value as average deviation; determining whether the scale factor of the scale registration meets a criterion based on the average deviation; When the average deviation is larger than the preset average deviation, judging that the scale factor of the proportional registration does not meet the standard, and adjusting the scale factor of the proportional registration based on the average deviation; And when the average deviation is smaller than or equal to the preset average deviation, judging that the scale factor of the proportional registration meets the standard, and adjusting each geometric coordinate point of the BIM model based on the temperature difference value.
4. A BIM-based high grade roof construction method according to claim 3, wherein the process of adjusting the scale factor of the scale registration based on the average deviation includes: obtaining the maximum size of a local heavy-gradient roof subjected to real-time scanning construction; Calculating the ratio of the average deviation to the maximum size, and recording the obtained ratio as a scaling factor adjustment quantity; determining a difference value between the scale factor and the scale factor adjustment quantity, and recording the obtained difference value as a first scale factor; Calculating the sum of the scale factors and the adjustment quantity of the scale factors, and recording the calculated sum as a second scale factor; reducing the scale factor to the first scale factor when the out-of-tolerance average value is positive And increasing the scale factor to the second scale factor when the out-of-tolerance average is negative.
5. The BIM-based high slope roof construction method of claim 4, wherein the process of adjusting each geometrical coordinate point of the BIM model based on the temperature difference value includes: Determining an actual measurement temperature during actual measurement point scanning and a reference temperature of the BIM; obtaining a difference value between the measured temperature and the reference temperature, and recording the obtained difference value as the temperature difference value; Calculating the product of the temperature difference and the linear expansion coefficient of the material of the component main body material, and recording the obtained product as a temperature compensation factor; and carrying out overall equal proportion scaling on each geometric coordinate point of the BIM based on the temperature compensation factors.
6. The BIM-based high grade roof construction method of claim 5, wherein the process of determining whether the high grade roof construction meets the standard based on the out-of-tolerance after adjustment of the scale factor of the scale registration and each of the geometric coordinate points of the BIM model is completed includes: when the out-of-tolerance rate is smaller than or equal to the preset out-of-tolerance rate, judging that the construction of the heavy-slope roof meets the standard, finishing periodic judgment of the construction of the heavy-slope roof, and judging the construction of the heavy-slope roof in the next period; and when the exceeding rate is larger than the preset exceeding rate, judging that the construction of the high-gradient roof does not meet the standard, and adjusting the allowable deviation value based on the exceeding rate.
7. The BIM-based high grade roof construction method of claim 6, wherein the process of adjusting the allowable deviation value based on the overrun includes: calculating the difference value between the super-difference rate and the preset super-difference rate, and recording the obtained difference value as a super-difference value; The allowable deviation value is increased based on the out-of-tolerance difference value, and the increase amplitude of the allowable deviation value is proportional to the out-of-tolerance difference value.
8. The BIM-based high slope roof construction method according to claim 7, wherein the process of decreasing the point cloud pumping rate based on the degree of increase of the allowable deviation value after the allowable deviation value is increased includes: the point cloud extraction ratio is reduced based on the degree of increase in the allowable deviation value, and the reduction degree of the point cloud extraction ratio is proportional to the degree of increase in the allowable deviation value.
9. The BIM-based high slope roof construction method according to claim 8, wherein the process of determining whether the high slope roof construction meets the standard based on the out-of-tolerance after the adjustment of the point cloud thinning ratio is completed includes: when the out-of-tolerance rate is smaller than or equal to the preset out-of-tolerance rate, judging that the construction of the heavy-slope roof meets the standard, finishing periodic judgment of the construction of the heavy-slope roof, and judging the construction of the heavy-slope roof in the next period; And when the out-of-tolerance rate is larger than the preset out-of-tolerance rate, judging that the construction of the high-gradient roof does not meet the standard, and generating and issuing a component deviation real-time correction instruction sheet.
10. A BIM-based high grade roof construction system using the method of any one of claims 1 to 9, comprising: The construction module is used for constructing the BIM according to design parameters of the high-gradient roof, and performing collision check on the constructed model to optimize the model; the scanning module is used for scanning the constructed local heavy-gradient roof in real time to acquire the corresponding point cloud data; The statistics module is respectively connected with the construction module and the scanning module, and is used for carrying out unified and proportional registration on the point cloud data and the coordinates of the BIM model, and carrying out matching and superposition under the unified coordinates; the statistical module is further used for thinning the point cloud data according to the point cloud thinning proportion to determine the actual measuring point; the statistical module is further used for calculating the normal distance between each actual measuring point and the BIM model surface and determining the out-of-tolerance actual measuring point which is located outside the allowable deviation value; the generation module is connected with the statistics module and is used for generating the deviation chromatograms according to the normal distances corresponding to the actual measuring points; The analysis module is respectively connected with the statistics module and the generation module and is used for calculating the ratio of the number of the actual measuring points with the statistical out-of-tolerance to the total number of the actual measuring points and recording the obtained ratio as the out-of-tolerance rate; the analysis module is also used for judging whether the construction of the high-gradient roof meets the standard or not based on the out-of-tolerance rate; The analysis module is also used for completing periodic judgment of the construction of the heavy-gradient roof according to the judgment result, or generating a corresponding processing instruction; The adjusting module is respectively connected with the constructing module, the scanning module, the statistics module, the generating module and the analyzing module, is used for adjusting the proportion factors of the proportion registration based on the average deviation, adjusting each geometric coordinate point of the BIM based on the temperature difference value, adjusting the allowable deviation value based on the over-tolerance ratio, reducing the point cloud dilution ratio based on the increasing degree of the allowable deviation value, and generating and issuing a component deviation real-time correction command list.

Description

BIM-based heavy-gradient roof construction method and system Technical Field The invention relates to the technical field of building construction, in particular to a BIM-based high-gradient roof construction method and system. Background BIM is a building information model, the core is to construct a digital model containing building full-dimensional information, a large-gradient roof is a roof form corresponding to a flat roof and a slope roof, roof gradient is generally taken as a division basis, a roof with gradient larger than 14 degrees is generally considered as a large-gradient roof, large-gradient roof construction is a site construction process aiming at the large-gradient roof, the core is to finish construction of procedures such as roof structure, water resistance, heat preservation and surface layer, the difficulty is obviously higher than that of the flat roof and the slope roof, the large-gradient roof construction based on BIM is an intelligent construction mode which enables BIM technology to be deeply integrated into the whole process of the large-gradient roof construction, the essence is to guide and optimize construction by using the digital model, pain points of traditional construction are solved, and with the development of times, the construction aspect of the large-gradient roof construction based on BIM is of important practical significance. The Chinese patent publication No. CN118780478A discloses a construction method for lofting a special-shaped roof based on a BIM model, which comprises the following steps of firstly establishing a REVIT model according to a design drawing of the special-shaped roof and grabbing points to be lofted, secondly guiding the model of the special-shaped roof out, checking the lofting points in a handbook, adding or reducing the lofting points according to the curved surface condition of a roof layer, thirdly, setting up a station by using a total station, fourthly, connecting the total station through the handbook, adjusting the total station into a laser mode without a prism, marking a worker at a light spot after the point is shot by the laser, and fifthly, switching the total station into the prism mode, grabbing key nodes and guiding the template to move so that the deviation meets the difference limiting requirement. Therefore, the special-shaped roof laying-out control point is grabbed by the scheme, the laying-out point is tested, adjusted and added by the hand-thinning laying-out point, so that the special-shaped roof with different curvatures is constructed, and the requirements of testing precision and reduction degree are met. But the above scheme can't carry out real-time accurate monitoring to the work progress of heavy grade roof to can't guarantee the efficiency of construction of heavy grade roof. Disclosure of Invention Therefore, the invention provides a construction method and a construction system for a high-gradient roof based on BIM, which are used for solving the problem that the construction efficiency of the high-gradient roof is low because the construction process of the high-gradient roof cannot be accurately monitored in real time in the prior art. In one aspect, the invention provides a BIM-based heavy-slope roof construction method, comprising the following steps: Constructing a BIM model according to design parameters of the high-gradient roof, and performing collision check on the constructed model to optimize the model; scanning the constructed local heavy-gradient roof in real time to acquire corresponding point cloud data; registering the coordinates of the point cloud data and the BIM model uniformly and proportionally, and matching and superposing the coordinates under the uniform coordinates; thinning the point cloud data according to the point cloud thinning proportion to determine an actual measuring point; Calculating the normal distance between each actual measuring point and the surface of the BIM model, and determining out-of-tolerance actual measuring points outside the allowable deviation value; Generating a deviation chromatogram according to the normal distance corresponding to the actual measuring point; Counting the ratio of the number of out-of-tolerance actual measuring points to the total number of actual measuring points, and recording the obtained ratio as out-of-tolerance rate; Judging whether the construction of the high-gradient roof meets the standard or not based on the out-of-tolerance ratio; The periodic judgment of the construction of the roof with the large gradient is completed according to the judgment result, Or, generating a corresponding processing instruction; Adjusting the scale factor of the proportion registration based on average deviation, adjusting each geometrical coordinate point of the BIM based on temperature difference, adjusting the allowable deviation value based on the out-of-tolerance ratio, reducing the point cloud thinning proportion based on the increasing deg