CN110307957B - High-precision prism-free lofting process for wind tunnel body - Google Patents
High-precision prism-free lofting process for wind tunnel body Download PDFInfo
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- CN110307957B CN110307957B CN201910591958.5A CN201910591958A CN110307957B CN 110307957 B CN110307957 B CN 110307957B CN 201910591958 A CN201910591958 A CN 201910591958A CN 110307957 B CN110307957 B CN 110307957B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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Abstract
The invention discloses a wind tunnel body high-precision prism-free lofting process, which solves the problem that the prior art adopts a traditional total station instrument measurement mode and cannot meet the lofting precision requirement. The invention adopts BIM model correction method or angle and distance double correction method to perform high-precision prism-free lofting on the wind tunnel body. The invention has wonderful conception, scientific and reasonable design and convenient use, can meet the requirement of high-precision prism-free lofting of the wind tunnel body, overcomes the problem that the traditional total station measurement mode cannot meet the lofting precision requirement, can overcome the defect that the traditional total station prism lofting cannot work on a vertical plane, can be applied to various complicated sections, can be widely applied to wind tunnel buildings, and has popularization and use values in other structural buildings.
Description
Technical Field
The invention relates to the field of building construction measurement, in particular to a wind tunnel body high-precision prism-free lofting process.
Background
Wind tunnels, in short, are devices that produce a controlled air flow, and the ultimate goal of construction is to achieve a uniform, controlled, high quality test air flow in the wind tunnel test section. The invention belongs to a return low-speed wind tunnel, which is provided with a continuous air loop, wherein airflow circulates in a tunnel body, the size of the central axis of the air loop is 150.86m multiplied by 45.65m, the design requirement is that the deviation of the central axis of the tunnel body loop is not more than 10mm (tolerance accumulation is not allowed) in the range of the total length of 390m, and the step difference requirement is not more than 3mm (the downwind direction is not more than 1 mm). The wind tunnel is of a frame beam structure, the cross section design shapes of the wind tunnel are octagon, quadrangle, circle and the like, and the tunnel walls around the contraction section are in a multi-curvature high-order curved surface shape. The cross section of the whole hole body is continuously changed on the three-dimensional space scale to form an ultra-long space special-shaped thin-wall structure, the maximum net height of the cross section of the hole body is 20m, the maximum net width of the cross section of the hole body is 24m, and the deviation of the flatness in the full-height/full-width range is not more than 3 mm. The flatness of the inner profile of the tunnel body is required to be within 1mm within the range of every 2 meters. Due to the structural particularity and high precision requirement of the engineering, the traditional total station measuring mode cannot meet the lofting precision requirement.
Therefore, designing a wind tunnel body high-precision prism-free lofting process to meet the requirements of wind tunnel body high-precision prism-free lofting becomes a technical problem to be solved urgently by technical personnel in the technical field.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the high-precision prism-free lofting process for the wind tunnel body solves the problem that the lofting precision requirement cannot be met by adopting a traditional total station measuring mode in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a wind tunnel body high-precision prism-free lofting process adopts a BIM model correction method or an angle and distance double correction method to perform high-precision prism-free lofting on a wind tunnel body.
Specifically, the BIM model correction method includes the steps of:
step 1, collecting the actual coordinates of a structural surface near a frame column pre-lofting position by using a total station;
step 2, putting the actual coordinate position back into the BIM model, and simulating the actual position in the BIM model;
and 3, marking the corrected coordinates of the theoretical profile at the actual simulation position, and then performing field lofting on the corrected coordinates.
Specifically, the angle and distance double correction method includes the following steps:
step 1, inputting theoretical coordinates to a total station for lofting, adjusting the angle of the total station, ensuring an angle deviation value to be 0, recording a distance deviation value L, and marking a point A on a structural surface;
step 2, finely adjusting the total station in the horizontal direction, ensuring that the distance deviation value is 0, recording the angle deviation value phi, and marking a point B on the structural plane;
and 3, recording the coordinates XY of the station building point of the total station, returning the data L, phi and XY to a design drawing, measuring the corrected value from A, B points to an accurate point C in the drawing, and measuring the accurate point C in the middle of A, B points by using a ruler on site.
More specifically, the calculation process of the angle and distance double correction method is as follows: determining the size of a range circle according to a theoretical coordinate position and station building point coordinates XY of the total station, determining the position of a point A according to the distance deviation value L, determining the position of a point B according to the angle deviation value phi and the range circle, determining the actual position of the frame column according to the position of A, B point, and determining the corrected coordinate position and the horizontal distance between the corrected position and the A, B point according to the actual position of the frame column and a theoretical profile design line.
Compared with the prior art, the invention has the following beneficial effects:
the invention has wonderful conception, scientific and reasonable design and convenient use, can meet the requirement of high-precision prism-free lofting of the wind tunnel body, overcomes the problem that the traditional total station measurement mode cannot meet the lofting precision requirement, can overcome the defect that the traditional total station prism lofting cannot work on a vertical plane, can be applied to various complicated sections, can be widely applied to wind tunnel buildings, and has popularization and use values in other structural buildings.
Drawings
FIG. 1 is a high-precision prism-free lofting view of a wind tunnel body by using a BIM model correction method.
FIG. 2 is a view of high-precision prism-free lofting of a wind tunnel body by using an angle and distance double correction method according to the invention.
FIG. 3 is a schematic diagram of the construction of the frame column of the wind tunnel body according to the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1 and 2, the high-precision prism-free lofting process for the wind tunnel body provided by the invention adopts a BIM model correction method or an angle and distance double correction method to perform high-precision prism-free lofting on the wind tunnel body. The invention has wonderful conception, scientific and reasonable design and convenient use, can meet the requirement of high-precision prism-free lofting of the wind tunnel body, overcomes the problem that the traditional total station measurement mode cannot meet the lofting precision requirement, can overcome the defect that the traditional total station prism lofting cannot work on a vertical plane, can be applied to various complicated sections, can be widely applied to wind tunnel buildings, and has popularization and use values in other structural buildings.
As shown in fig. 1, the BIM model correction method of the present invention includes the following steps:
step 1, collecting the actual coordinates of a structural surface near a frame column pre-lofting position by using a total station;
step 2, putting the actual coordinate position back into the BIM model, and simulating the actual position in the BIM model;
and 3, marking the corrected coordinates of the theoretical profile at the actual simulation position, and then performing field lofting on the corrected coordinates.
As shown in fig. 2, the angle and distance double correction method of the present invention includes the following steps:
step 1, inputting theoretical coordinates to a total station for lofting, adjusting the angle of the total station, ensuring an angle deviation value to be 0, recording a distance deviation value L, and marking a point A on a structural surface;
step 2, finely adjusting the total station in the horizontal direction, ensuring that the distance deviation value is 0, recording the angle deviation value phi, and marking a point B on the structural plane;
and 3, recording the coordinates XY of the station building point of the total station, returning the data L, phi and XY to a design drawing, measuring the corrected value from A, B points to an accurate point C in the drawing, and measuring the accurate point C in the middle of A, B points by using a ruler on site.
The calculation process of the angle and distance double correction method of the invention is as follows: determining the size of a range circle according to a theoretical coordinate position and station building point coordinates XY of the total station, determining the position of a point A according to the distance deviation value L, determining the position of a point B according to the angle deviation value phi and the range circle, determining the actual position of the frame column according to the position of A, B point, and determining the corrected coordinate position and the horizontal distance between the corrected position and the A, B point according to the actual position of the frame column and a theoretical profile design line.
As shown in fig. 3, in order to ensure stability and reliability of the control points, the frame column is constructed first, and the construction control points are lofted to the side surface of the frame column in a prism-free mode by using a total station, and because of positioning deviation of the bottom of the frame column and inclination and mold expansion deviation existing in the concrete construction pouring process, a BIM model correction method or a dual angle and distance correction method needs to be adopted to perform high-precision prism-free lofting on the wind tunnel body, so as to solve the problem that the theoretical coordinates of the drawing cannot be lofted.
In the lofting process, as the lofting point position in the non-prism mode is marked by using the reflector, the total station cannot be automatically aligned like the prism mode, so that the human factor observation error is increased, and in order to effectively reduce the human factor observation error, the three-view observation method is adopted to reduce the human factor observation error. The three-view observation method specifically comprises the following steps: the human eyes respectively observe from the left side, the center and the right side relative to the ocular lens, and the centers of the reflectors and the ocular lens cross hairs in three visual angles are coincident or bilaterally symmetrical.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (2)
1. A wind tunnel body high-precision prism-free lofting process is characterized in that the wind tunnel body is subjected to high-precision prism-free lofting by adopting an angle and distance double correction method; the angle and distance double correction method comprises the following steps:
step 1, inputting theoretical coordinates to a total station for lofting, adjusting the angle of the total station, ensuring an angle deviation value to be 0, recording a distance deviation value L, and marking a point A on a structural surface;
step 2, finely adjusting the total station in the horizontal direction, ensuring that the distance deviation value is 0, recording the angle deviation value phi, and marking a point B on the structural plane;
and 3, recording the coordinates XY of the station building point of the total station, returning the data L, phi and XY to a design drawing, measuring the corrected value from A, B points to an accurate point C in the drawing, and measuring the accurate point C in the middle of A, B points by using a ruler on site.
2. The wind tunnel body high-precision prism-free lofting process according to claim 1, wherein the calculation process of the angle and distance double correction method is as follows: determining the size of a range circle according to a theoretical coordinate position and station building point coordinates XY of the total station, determining the position of a point A according to the distance deviation value L, determining the position of a point B according to the angle deviation value phi and the range circle, determining the actual position of the frame column according to the position of A, B point, and determining the corrected coordinate position and the horizontal distance between the corrected position and the A, B point according to the actual position of the frame column and a theoretical profile design line.
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| CN201910591958.5A CN110307957B (en) | 2019-07-02 | 2019-07-02 | High-precision prism-free lofting process for wind tunnel body |
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| CN110307957B true CN110307957B (en) | 2021-07-13 |
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| CN110646159A (en) * | 2019-10-18 | 2020-01-03 | 中国建筑第八工程局有限公司 | Construction method for high-precision control and measurement of cast-in-place bare concrete wind tunnel |
| CN113029500A (en) * | 2021-03-26 | 2021-06-25 | 中国空气动力研究与发展中心超高速空气动力研究所 | Assembly process of main box body of large-scale test section of hypersonic wind tunnel |
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| CN107192381A (en) * | 2017-05-24 | 2017-09-22 | 中国建筑局（集团）有限公司 | A kind of surveying and locating method of any disorder space structure |
| CN108396653A (en) * | 2018-03-01 | 2018-08-14 | 成都佰人佰思科技有限公司 | A kind of steel structural bridge beam construction method |
| CN108759774A (en) * | 2018-05-28 | 2018-11-06 | 中国建筑第八工程局有限公司 | A kind of measurement method in irregular curved tunnel |
| CN108896026A (en) * | 2018-05-21 | 2018-11-27 | 中国建筑第八工程局有限公司 | The measurement method of the curtain wall construction of Complex Different Shape structural construction |
| CN109184213A (en) * | 2018-10-31 | 2019-01-11 | 青岛建集团有限公司 | Steel grid construction technique based on BIM setting-out and 3-D scanning |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192381A (en) * | 2017-05-24 | 2017-09-22 | 中国建筑局（集团）有限公司 | A kind of surveying and locating method of any disorder space structure |
| CN108396653A (en) * | 2018-03-01 | 2018-08-14 | 成都佰人佰思科技有限公司 | A kind of steel structural bridge beam construction method |
| CN108896026A (en) * | 2018-05-21 | 2018-11-27 | 中国建筑第八工程局有限公司 | The measurement method of the curtain wall construction of Complex Different Shape structural construction |
| CN108759774A (en) * | 2018-05-28 | 2018-11-06 | 中国建筑第八工程局有限公司 | A kind of measurement method in irregular curved tunnel |
| CN109184213A (en) * | 2018-10-31 | 2019-01-11 | 青岛建集团有限公司 | Steel grid construction technique based on BIM setting-out and 3-D scanning |
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