CN114319881A - Arc dome embedded part positioning method - Google Patents
Arc dome embedded part positioning method Download PDFInfo
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- CN114319881A CN114319881A CN202111541720.5A CN202111541720A CN114319881A CN 114319881 A CN114319881 A CN 114319881A CN 202111541720 A CN202111541720 A CN 202111541720A CN 114319881 A CN114319881 A CN 114319881A
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Abstract
The invention provides a method for positioning an arc dome embedded part, which comprises the steps of arranging dome buttresses, hardening concrete on the ground of a dome prefabricated site, establishing a measuring central point, establishing a measuring reference line, establishing a total station on the central point, and setting the position of the total station according to the reference line; according to the azimuth and the distance of the embedded part, the position of the embedded part is released on the concrete hardening plane, and the embedded part cross line identification is carried out; and erecting a zenith instrument on the cross line of the embedded part, connecting the zenith instrument with a laser emitter, projecting laser points on the dome plate, and lofting out the position line of the embedded part by the laser points projected three times. The invention provides basis for the installation of the embedded part of the arc dome structure, has accurate positioning and high efficiency, the embedded part is provided with a marking line on the ground, avoids the interference of the erection of the support frame body, is convenient to measure, can be laid out on the ground after the concrete is hardened, avoids the mutual interference with the assembly operation of the dome, does not occupy the space of other construction procedures, and is beneficial to meeting the requirement of the optimization of the construction progress.
Description
The technical field is as follows:
the invention belongs to the technical field of nuclear power station construction, and particularly relates to a positioning method for an arc-shaped dome embedded part, in particular to a positioning method for a dome embedded part of a nuclear reactor factory building.
Background art:
the dome of the nuclear reactor plant is an arc-shaped steel-lined dome, the height of the first section of the dome is 3606, the radius of the dome is 4508, and the circle center of the dome is located on a circle with the radius of 13.5m around the center of a bottom opening of the dome; second section height 5402, radius 27008, the centre of a circle is located the center, because the piecemeal is assembled, the dome is different radial combinations, and the dome has arranged owing to need the welded pipe to support, buries the piece and is located the arc structure, and the time bit position is difficult to confirm when the location lofting, simultaneously because set up construction scaffold, influences the location lofting sight, makes the lofting become difficult point. For a long time, the dome of a reactor plant of a nuclear power station is positioned by adopting a total station erected at the center (circle center) and positioning the position according to a theoretical value, personnel need to continuously adjust the position in high altitude, the movement is frequent, the labor intensity is high, the construction progress is influenced, the operation is often difficult to be carried out in time, the labor and the time are wasted, and the positioning precision and the progress are influenced. How to effectively utilize the working space, not influenced by other construction progress, ensure that other processes can progress in parallel and accurately and efficiently finish the dome embedded part position positioning becomes a difficult problem in engineering. Based on this, the invention provides a method for positioning an arc dome embedded piece to solve the above problems.
The invention content is as follows:
the invention aims to solve the problems and the defects in the prior art, and provides a method for positioning an arc dome embedded part by means of cooperation of a total station, a zenith instrument and a laser emitter, which can accurately and efficiently complete embedded part positioning.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for positioning an arched dome insert, comprising the steps of:
step one, arranging a dome buttress;
secondly, hardening the ground concrete of the dome prefabricated site;
step three, setting a measuring central point;
step four, setting up a measuring datum line;
fifthly, setting a total station at the measuring center point, and setting the position of the total station according to the reference line;
sixthly, according to the direction and the distance of the embedded part, releasing the position of the embedded part on the concrete hardening plane, and marking the embedded part cross line;
step seven, erecting a zenith instrument at the central position of the cross line of the planar embedded part, connecting the zenith instrument with a laser emitter, opening the laser emitter after centering and leveling, and projecting the laser emitter onto a dome plate to obtain a first laser point, wherein the first laser point position is the central point of the embedded part;
step eight, erecting a zenith instrument at one point on the cross line of the planar embedded part, and projecting a second laser point on the dome plate by the same method as the step seven; and throwing a third laser point on the other line of the cross line of the plane embedded part in the same way, thereby lofting out the position line of the embedded part at three points.
Further, in the first step, the dome buttresses are arranged on the ground of the dome prefabricated site, and the number of the dome buttresses is even; the dome buttresses are uniformly distributed on the circumference of the bottom opening of the dome.
Further, in the second step, the dome prefabricated site is circular and corresponds to the dome base opening circle.
Further, in the third step, the measurement center point is the center of the dome base opening.
Furthermore, in the fourth step, the reference line is a reference cross line, the reference cross line comprises two mutually perpendicular straight lines, and each straight line is respectively connected with the two dome buttresses and the circle center of the dome base opening.
The invention has the beneficial effects that:
the method solves the problem of positioning the embedded part of the arc dome, can be used for positioning the embedded part of the arc dome, can obtain an accurate positioning position so as to provide a basis for installing the embedded part of the dome, has good visibility conditions, avoids the interference of the erection of the support frame body due to the fact that the embedded part is provided with the marking line on the ground, is convenient to measure, does not occupy the space of other construction procedures, and is beneficial to meeting the requirement of construction progress optimization.
Description of the drawings:
FIG. 1 is a diagram of a dome reference point, datum line arrangement for a nuclear reactor building in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a dome reference point of a nuclear reactor building in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of a setting out of a concrete hardened ground for an embedded part according to an embodiment of the invention;
FIG. 4 is a schematic diagram of point location projection according to an embodiment of the present invention;
the labels in the figures are: 1-12, reference point; 13. a total station; 14. a zenith instrument; 15. a dome buttress; 16. a channel.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a method for positioning an arc dome embedded part, which is completed by matching a total station, a zenith instrument and a laser emitter. The center of the nuclear reactor building and the center of the dome of the embodiment have the coordinates (A7000.000 and B3000.000) relative to a preset coordinate origin, the height 3606 of the first section is 4508, and the center of the circle is located on a radius circle which surrounds the center of a dome opening by 13.5 m; the height of the second section 5402, the radius 27008, the center of the circle located at the center, the number of embedded parts is 114, different positions of the dome are distributed, and dome embedded part construction is carried out after the dome plate assembly is finished.
As shown in fig. 1-4, the method specifically comprises the following steps:
step one, arranging 36 dome buttresses 15 on the ground of a dome prefabricated site, wherein the dome buttresses 15 are uniformly distributed on the circumference of a dome bottom opening;
secondly, hardening concrete on the ground of the dome prefabricated site, wherein the dome prefabricated site is circular and corresponds to the bottom opening circle of the dome;
step three, setting a measuring central point O;
step four, setting measuring reference points 1-12 and a reference cross line, wherein the reference points are arranged on the dome buttresses 15, the reference cross line comprises two mutually perpendicular straight lines, and each straight line is respectively connected with the two dome buttresses 15 and the circle center of a dome bottom opening;
fifthly, setting a total station 13 on the measuring center point O, and setting the position of the total station according to the reference line;
sixthly, according to the direction and the distance of the embedded part on the drawing, releasing the position of the embedded part on the concrete hardening plane, and marking the embedded part cross line;
step seven, erecting a zenith instrument 14 at the center position of the plane embedded part cross line, connecting the zenith instrument 14 with a laser emitter, opening the laser emitter after centering and leveling, and projecting the laser emitter onto a dome plate to obtain a first laser point, wherein the first laser point position is the embedded part position center point;
step eight, erecting a zenith instrument 14 on one point of the cross line of the planar embedded part, and projecting a second laser point on the dome plate by the same method as the step seven; and throwing a third laser point on the other line of the cross line of the plane embedded part in the same way, thereby lofting out the position line of the embedded part at three points.
And then, adjusting the position of the plate according to the error value, and detecting until the error is smaller than the allowable deviation value.
The on-site practice operation proves that the method for positioning the arc dome embedded part effectively solves the positioning problem in the building of the radius of the dome of the nuclear reactor plant, and has the following advantages:
1. the accurate positioning detection is carried out according to the actual field, and compared with the original positioning detection method, the positioning precision is improved;
2. the zenith instrument can be erected according to the general conditions without being erected at a central point, and the plane point can avoid the obstruction of the support frame after lofting, so that the occupation of a construction working face is avoided, the operation can be carried out in parallel with other procedures, and the optimization of the construction progress is facilitated;
3. the positioning detection problem of the space stereo variable-size dome is effectively solved, and the application is flexible and convenient.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention, it should be noted that, for those skilled in the art, several modifications and decorations without departing from the principle of the present invention should be regarded as the protection scope of the present invention.
Claims (5)
1. A method for positioning an arc dome embedded part is characterized by comprising the following steps:
step one, arranging a dome buttress;
secondly, hardening the ground concrete of the dome prefabricated site;
step three, setting a measuring central point;
step four, setting up a measuring datum line;
fifthly, setting a total station at the measuring center point, and setting the position of the total station according to the reference line;
sixthly, according to the direction and the distance of the embedded part, releasing the position of the embedded part on the concrete hardening plane, and marking the embedded part cross line;
step seven, erecting a zenith instrument at the central position of the cross line of the planar embedded part, connecting the zenith instrument with a laser emitter, opening the laser emitter after centering and leveling, and projecting the laser emitter onto a dome plate to obtain a first laser point, wherein the first laser point position is the central point of the embedded part;
step eight, erecting a zenith instrument at one point on the cross line of the planar embedded part, and projecting a second laser point on the dome plate by the same method as the step seven; and throwing a third laser point on the other line of the cross line of the plane embedded part in the same way, thereby lofting out the position line of the embedded part at three points.
2. The method of positioning an arcuate dome insert according to claim 1,
in the first step, dome buttresses are arranged on the ground of a dome prefabricated site, and the number of the dome buttresses is even; the dome buttresses are uniformly distributed on the circumference of the bottom opening of the dome.
3. The method of positioning an arcuate dome insert according to claim 1,
in the second step, the dome prefabricated site is in a circular shape and corresponds to the bottom opening circle of the dome.
4. The method of positioning an arcuate dome insert according to claim 1,
in the third step, the measuring center point is the center of the dome base opening.
5. The method of positioning an arcuate dome insert according to claim 1,
in the fourth step, the reference line is a reference cross line, the reference cross line comprises two mutually perpendicular straight lines, and each straight line is respectively connected with the centers of the two opposite dome buttresses and the dome base openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541720.5A CN114319881A (en) | 2021-12-16 | 2021-12-16 | Arc dome embedded part positioning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541720.5A CN114319881A (en) | 2021-12-16 | 2021-12-16 | Arc dome embedded part positioning method |
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| CN114319881A true CN114319881A (en) | 2022-04-12 |
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| CN202111541720.5A Pending CN114319881A (en) | 2021-12-16 | 2021-12-16 | Arc dome embedded part positioning method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001264060A (en) * | 2000-03-22 | 2001-09-26 | Takenaka Komuten Co Ltd | Pile positioning measuring method and pile positioning measuring device for steel frame member |
| US20120297698A1 (en) * | 2011-05-26 | 2012-11-29 | Matthew Edwards | Systems and methods for providing rounded vault forming buildings |
| CN104314169A (en) * | 2014-10-24 | 2015-01-28 | 中国建筑第八工程局有限公司 | Construction method of large-span ellipsoidal aluminum alloy dome structure |
| CN107806205A (en) * | 2017-09-20 | 2018-03-16 | 中国核工业华兴建设有限公司 | A kind of mounting structure and installation method of unlined steel dome |
-
2021
- 2021-12-16 CN CN202111541720.5A patent/CN114319881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001264060A (en) * | 2000-03-22 | 2001-09-26 | Takenaka Komuten Co Ltd | Pile positioning measuring method and pile positioning measuring device for steel frame member |
| US20120297698A1 (en) * | 2011-05-26 | 2012-11-29 | Matthew Edwards | Systems and methods for providing rounded vault forming buildings |
| CN104314169A (en) * | 2014-10-24 | 2015-01-28 | 中国建筑第八工程局有限公司 | Construction method of large-span ellipsoidal aluminum alloy dome structure |
| CN107806205A (en) * | 2017-09-20 | 2018-03-16 | 中国核工业华兴建设有限公司 | A kind of mounting structure and installation method of unlined steel dome |
Non-Patent Citations (1)
| Title |
|---|
| 沈建宇: "大型核电站穹顶吊装施工研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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