CN108363862B - Reverse analysis method for circular steel tube construction errors - Google Patents
Reverse analysis method for circular steel tube construction errors Download PDFInfo
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- CN108363862B CN108363862B CN201810131914.XA CN201810131914A CN108363862B CN 108363862 B CN108363862 B CN 108363862B CN 201810131914 A CN201810131914 A CN 201810131914A CN 108363862 B CN108363862 B CN 108363862B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
- E04B2/96—Curtain walls comprising panels attached to the structure through mullions or transoms
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Abstract
The embodiment of the invention discloses a reverse analysis method for construction errors of a round steel pipe, which comprises the following steps: measuring two points at the visible position of the periphery of each round steel pipe close to the two ends in a construction site, recording the actual coordinate value of the round steel pipe and feeding back the actual coordinate value to the design; establishing a plane by taking each point as an origin and taking the direction parallel to the central line of the circular steel tube as the Z direction, and establishing a circle with the radius equal to that of the circular steel tube on the plane; projecting two circles at the same end onto a plane established by a point closer to an end point, wherein the two projected circles have two intersection points, and taking the point closest to the original center line; connecting the intersection points of the two ends to obtain a line segment and extending the line segment to obtain the position of the central line of the simulated actual circular steel pipe, and establishing the circular steel pipe according to the simulated central line; comparing the theoretical position with the actual position of the simulated circular steel pipe, and analyzing errors. According to the reverse analysis method for the construction error of the circular steel tube, only 4 random point positions are needed for simulating one steel keel, the problem of measuring blind areas is solved, the workload of measuring personnel is reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to a method for analyzing installation errors of round steel tubes of a curtain wall, in particular to a method for reversely analyzing construction errors of the round steel tubes.
Background
In the construction process of the curtain wall, particularly the curtain wall with various arc shapes enters the most complicated construction stage of the steel structure of the curtain wall after the optimization and the scheme modeling of the curtain wall surface are completed in the early stage, the whole curtain wall keel arrangement is determined according to the radial direction and the annular direction of the grids, and the keel arrangement is all circular steel tubes, and the radial tubes are intersected with the annular tubes. In the construction process, the positioning point cannot be accurately found, so that the construction error cannot be estimated. And (4) analyzing a positioning method of a steel structure construction unit, and finding that the steel structure construction unit has certain uncertainty and needs to check the result. If the deviation of the steel structure is too large, the situations that steel keels need to be continuously modified in the plate installation process, even the steel keels are reversed on site, the plates are subjected to blanking processing again and the like can occur.
Generally speaking, after early theoretical analysis is completed, deepening of a steel keel model is completed according to a scheme, curtain wall keels are all expressed in the model according to a theoretical state, and then specific positioning data are also extracted faithfully according to requirements put forward in advance; however, when the construction of a steel structure of a curtain wall is started, the problem is encountered, the curtain wall keel is completely a circular steel tube, and the central line end point is considered by the habit of people to be a characteristic point of the circular steel tube, but the steel keel is intersected, so that the points are invisible on the site, and the result cannot be directly measured. In order to solve the problem, a steel structure construction unit is positioned by a method of leading out a reference point from a central line end point to the Z height direction of the space, although the invisible position is avoided and the original end point cannot be measured, the point is still suspended, the accuracy of a pay-off structure of the steel structure construction unit is still worried about during construction, and the result needs to be reviewed in some way. Due to the modeling factor of the building, a scaffold is erected on the periphery of the steel keel during the site steel keel construction, so that the total station has a plurality of visual angle blind points, if the conventional method of providing a measuring point and a theoretical coordinate value by design and then rechecking the real coordinate of the point on site is adopted, the measuring point in the corresponding model cannot be accurately found on site, and the total station is probably shielded.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is that a reverse analysis method for circular steel tube construction errors is provided aiming at the problems that measurement points in a corresponding model cannot be accurately found on site and are likely to be shielded if a conventional method that a total station has a plurality of visual angle blind points during site steel keel construction is adopted, and the measurement points and theoretical coordinate values are provided by design, and the real coordinates of the points are rechecked on site.
In order to solve the technical problem, an embodiment of the present invention provides a reverse analysis method for a circular steel tube construction error, where the reverse analysis method for the circular steel tube construction error includes: measuring two points at the visible position of the periphery of each round steel pipe close to the two ends in a construction site, recording the actual coordinate value of the round steel pipe and feeding back the actual coordinate value to the design; establishing a plane by taking each point as an origin and taking the direction parallel to the central line of the circular steel tube as the Z direction, and establishing a circle with the radius equal to that of the circular steel tube on the plane; projecting two circles at the same end onto a plane established by a point closer to an end point, wherein the two projected circles have two intersection points, and taking the point closest to the original center line; connecting the intersection points of the two ends to obtain a line segment and extending the line segment to obtain the position of the central line of the simulated actual circular steel pipe, and establishing the circular steel pipe according to the simulated central line; and finally comparing the positions of the theoretical circular steel pipe and the simulated actual circular steel pipe, analyzing errors and giving an adjustment suggestion to assist field adjustment and modification.
Furthermore, two points are taken from the surface of the circular steel tube to the same quadrant or the adjacent quadrants, so that subsequent calculation is facilitated.
Furthermore, after the actual round steel pipe position is obtained, whether the distance from the point taken in the step one to the actual round steel pipe is the radius of the round steel pipe or not is verified, through batch statistics, the distance from the point fed back in the step one to the surface of the simulated round steel pipe is within 0.1mm, the simulated site round steel pipe position is accurate, and the method is feasible.
The embodiment of the invention has the following beneficial effects: the steel keel only needs 4 random point positions in simulation, the problem of measuring the blind area is solved, the work load of survey crew has been alleviateed, and improve work efficiency, accomplish the simulation with fixed logic program, the overall process of analysis and giving adjustment data, design feedback efficiency is also high, the position of steel keel has been adjusted in advance, for the installation of later stage glass plate base, the efficiency of plate installation has been promoted, the anti-chi that has probably appeared has also been avoided, the problem of extravagant materials such as plate redo.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a round steel pipe point taking in a step I of the reverse analysis method for the construction error of the round steel pipe provided by the invention;
FIG. 2 is a schematic structural diagram of two circles formed according to a theoretical normal in a second step of the reverse analysis method for the construction error of the round steel pipe provided by the invention;
FIG. 3 is a schematic structural diagram of a projection intersection point in the third step of the reverse analysis method for the construction error of the round steel pipe provided by the invention;
FIG. 4 is a schematic structural diagram of the comparison positions of the simulated circular steel tube and the actual circular steel tube in the fourth step of the reverse analysis method for the circular steel tube construction error provided by the invention;
fig. 5 is a schematic diagram of a reverse analysis result of the round steel pipe in the fifth step of the reverse analysis method for the construction error of the round steel pipe provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a reverse analysis method for a circular steel tube construction error, which comprises the following steps:
the method comprises the following steps: and measuring two points at the visible position of the periphery of each round steel pipe close to the two ends in a construction site, and recording the actual coordinate value of the round steel pipe and feeding back the actual coordinate value to the design. Two points are taken in the same quadrant or adjacent quadrants of the circular steel tube surface ring, so that subsequent calculation is facilitated. Referring to fig. 1, fig. 1 is a schematic structural diagram of point taking of a round steel pipe in a step one of the reverse analysis method for construction errors of a round steel pipe provided by the invention.
Step two: and establishing a plane by taking each point as an origin and taking the direction parallel to the central line of the circular steel tube as the Z direction, and establishing a circle with the radius equal to that of the circular steel tube on the plane. Referring to fig. 2, fig. 2 is a schematic structural diagram of two circles formed according to a theoretical normal in the second step of the reverse analysis method for the construction error of the round steel pipe provided by the invention.
Step three: and projecting the two circles at the same end onto a plane established by the point closer to the end point, wherein the two projected circles have two intersection points, and taking the point closest to the original center line. Fig. 3 is a schematic structural diagram of projection intersection points in the third step of the reverse analysis method for the construction error of the round steel pipe provided by the invention.
Step four: and connecting the intersection points of the two ends to obtain a line segment and extending the line segment to obtain the position of the central line of the simulated actual circular steel tube, and establishing the circular steel tube by the simulated central line. In fact, the error is caused by taking the theoretical center line as the normal direction in the step two, the actual normal direction is used, but the actual normal direction is unknown at the moment, so that after the actual circular steel tube position is obtained, whether the distance from the point obtained in the step one to the actual circular steel tube is the radius of the circular steel tube is verified, through batch statistics, the distance from the point fed back in the step one to the surface of the simulated circular steel tube is within 0.1mm, the position of the simulated circular steel tube on the spot is accurate, and the method is feasible. Referring to fig. 4, fig. 4 is a schematic structural diagram of the comparison positions of the simulated circular steel tube and the actual circular steel tube in the fourth step of the reverse analysis method for the circular steel tube construction error provided by the invention.
Step five: and finally comparing the positions of the theoretical circular steel pipe and the simulated actual circular steel pipe, analyzing errors and giving an adjustment suggestion to assist field adjustment and modification. Fig. 5 is a schematic diagram of a reverse analysis result of the round steel pipe in the fifth step of the reverse analysis method for the construction error of the round steel pipe provided by the invention.
The embodiment of the invention has the following beneficial effects: the steel keel only needs 4 random point positions in simulation, the problem of measuring the blind area is solved, the work load of survey crew has been alleviateed, and improve work efficiency, accomplish the simulation with fixed logic program, the overall process of analysis and giving adjustment data, design feedback efficiency is also high, the position of steel keel has been adjusted in advance, for the installation of later stage glass plate base, the efficiency of plate installation has been promoted, the anti-chi that has probably appeared has also been avoided, the problem of extravagant materials such as plate redo.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A reverse analysis method for construction errors of round steel pipes is characterized by comprising the following steps:
the method comprises the following steps: measuring two points at the visible position of the periphery of each round steel pipe close to the two ends in a construction site, recording the actual coordinate value of the round steel pipe and feeding back the actual coordinate value to the design;
step two: establishing a plane by taking each point as an origin and taking the direction parallel to the central line of the circular steel tube as the Z direction, and establishing a circle with the radius equal to that of the circular steel tube on the plane;
step three: projecting two circles at the same end onto a plane established by a point closer to an end point, wherein the two projected circles have two intersection points, and taking the point closest to the original center line;
step four: connecting the intersection points of the two ends to obtain a line segment and extending the line segment to obtain the position of the central line of the simulated actual circular steel pipe, and establishing the circular steel pipe according to the simulated central line;
step five: and finally comparing the central line positions of the theoretical circular steel pipe and the simulated actual circular steel pipe, analyzing errors, and giving an adjustment suggestion to assist in field adjustment and modification.
2. The method for reversely analyzing the construction error of the circular steel tube according to claim 1, wherein in the step one, two points are taken in the circular steel tube surface ring to the same quadrant or the adjacent quadrants, so that the subsequent calculation is convenient.
3. The method for reverse analysis of the construction error of the circular steel tube according to claim 1, wherein in the fourth step, after the position of the center line of the simulated actual circular steel tube is obtained, whether the distance from the point taken in the first step to the center line of the simulated actual circular steel tube is the radius of the circular steel tube is verified, through batch statistics, the distance from the point fed back in the first step to the surface of the simulated circular steel tube is within 0.1mm, the position of the simulated circular steel tube on site is accurate, and the method is feasible.
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| CN201810131914.XA CN108363862B (en) | 2018-02-09 | 2018-02-09 | Reverse analysis method for circular steel tube construction errors |
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| CN108363862B true CN108363862B (en) | 2021-06-04 |
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| CN111058551B (en) * | 2019-12-16 | 2021-04-06 | 北京工业大学 | Testing device for researching tolerance fit of industrial building parts |
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| CN101942906A (en) * | 2010-09-21 | 2011-01-12 | 同济大学 | Buckling-restraining and strengthening system for circular steel tubes |
| CN104060839A (en) * | 2014-06-19 | 2014-09-24 | 中国五冶集团有限公司 | Construction control method special for steel-structure vertical keels of metal curtain wall of large gymnasium |
| CN105608294A (en) * | 2016-01-28 | 2016-05-25 | 武汉凌云建筑装饰工程有限公司 | Single-curved plate fitting hyperbolic modeling method for curtain wall design and construction |
| CN107664483A (en) * | 2016-07-29 | 2018-02-06 | 宝山钢铁股份有限公司 | A kind of cylinder bar shape parameter measurement method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102834691B (en) * | 2010-05-10 | 2015-05-20 | 莱卡地球系统公开股份有限公司 | Surveying method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191723A (en) * | 2007-12-07 | 2008-06-04 | 保定惠阳航空螺旋桨制造厂 | Beveled wheel tooth error three-coordinate measuring method |
| CN101942906A (en) * | 2010-09-21 | 2011-01-12 | 同济大学 | Buckling-restraining and strengthening system for circular steel tubes |
| CN104060839A (en) * | 2014-06-19 | 2014-09-24 | 中国五冶集团有限公司 | Construction control method special for steel-structure vertical keels of metal curtain wall of large gymnasium |
| CN105608294A (en) * | 2016-01-28 | 2016-05-25 | 武汉凌云建筑装饰工程有限公司 | Single-curved plate fitting hyperbolic modeling method for curtain wall design and construction |
| CN107664483A (en) * | 2016-07-29 | 2018-02-06 | 宝山钢铁股份有限公司 | A kind of cylinder bar shape parameter measurement method |
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