CN111455848A - Positioning and rechecking method for accurately positioning cable-stayed bridge tower column template based on steel anchor beam - Google Patents
Positioning and rechecking method for accurately positioning cable-stayed bridge tower column template based on steel anchor beam Download PDFInfo
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- CN111455848A CN111455848A CN202010184470.3A CN202010184470A CN111455848A CN 111455848 A CN111455848 A CN 111455848A CN 202010184470 A CN202010184470 A CN 202010184470A CN 111455848 A CN111455848 A CN 111455848A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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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Abstract
The invention discloses a positioning and rechecking method for accurately positioning a cable-stayed bridge tower column template based on a steel anchor beam, which relates to the technical field of construction measurement and specifically comprises the following steps: accurately positioning the position of the steel anchor beam according to the designed three-dimensional coordinate, and acquiring the elevation and the coordinate of the top surface of the steel anchor beam; obtaining theoretical values of relative distances from the same-height position of the side surface of the tower column and the top surface of the steel anchor beam to four sides of the top surface of the steel anchor beam according to the height and the coordinate of the top surface of the steel anchor beam and tower column design parameters so as to obtain the theoretical values of the relative distances from the same-height position of the top surface of the tower column template to be installed and the top surface of the steel anchor beam to four sides of the top surface of the steel anchor beam; after the tower column template is installed, measuring the actual values of the relative distances from the four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam; according to the theoretical value and the actual value of the relative distance, whether the installed tower column template meets the preset design requirement is rechecked, the method and the device can simplify the measurement process and improve the working efficiency and the rechecking precision.
Description
Technical Field
The invention relates to the technical field of construction measurement, in particular to a positioning and rechecking method for accurately positioning a cable-stayed bridge tower column template based on a steel anchor beam.
Background
The rechecking work of the tower column template of the cable-stayed bridge is an important process in the construction of the main tower, and the rechecking result of the tower column template of the cable-stayed bridge directly influences the appearance and the quality of the tower column. However, it is not easy to do the positioning and checking work of the tower column template. The cable-stayed bridge is often large in span and high in tower body, and particularly for a river-crossing and sea-crossing bridge, the requirement on an instrument is extremely high, and a measurement method needs to be elaborated when an accurate measurement result is required to be obtained remotely and accurately. The conventional method mostly adopts a high-precision automatic collimation total station, and the station is arranged at a high-precision and stable control point on the bank for long-distance measurement. In the construction of a tall tower column, due to high-altitude operation, a nearly closed barrier is formed by a platform and a maintenance structure which need to be built, and the measurement sight is almost completely blocked when the elevation angle of the total station is measured, so that the positioning and rechecking work task of a tower column template each time is difficult, and the work efficiency and the measurement precision are seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a positioning and rechecking method for accurately positioning a cable-stayed bridge tower column template based on a steel anchor beam, which can simplify the measurement process and improve the working efficiency and rechecking precision.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam specifically comprises the following steps:
accurately positioning the position of the steel anchor beam according to the three-dimensional coordinate of the designed steel anchor beam, and acquiring the elevation and the coordinate of the top surface of the steel anchor beam;
obtaining theoretical values of relative distances from the positions of the side surface of the tower column and the top surface of the steel anchor beam at the same height to four sides of the top surface of the steel anchor beam according to the height and the coordinate of the top surface of the steel anchor beam and design parameters of the tower column;
obtaining theoretical values of relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam according to the theoretical values of the relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam;
installing a tower column template;
after the tower column template is installed, measuring the actual values of the relative distances from the four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam;
and rechecking whether the installed tower column template meets the preset design requirement or not according to the theoretical value and the actual value of the relative distance.
On the basis of the technical scheme, the tower column template is installed, and the method specifically comprises the following steps: and finishing the installation of the tower column template according to the theoretical value of the relative distance between the same height position of the tower column template to be installed and the top surface of the steel anchor beam and the four edges of the top surface of the steel anchor beam.
On the basis of the technical scheme, after the tower column template is installed, the top surface of the tower column template is 10cm higher than that of the steel anchor beam.
On the basis of the technical scheme, the actual values of the relative distances from the four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam are measured in a steel tape manner.
On the basis of the technical scheme, the design parameters of the tower comprise bottom corner point coordinates and tower surface slope.
On the basis of the technical scheme, the steel anchor beam is accurately positioned by adopting an internal control method.
On the basis of the technical scheme, when the steel anchor beam is accurately positioned, the scaffold and the enclosure required by the construction of the tower column template are not erected.
On the basis of the technical scheme, the positioning precision of the steel anchor beam is 2 mm.
Compared with the prior art, the invention has the advantages that:
according to the positioning and rechecking method for accurately positioning the cable-stayed bridge tower template based on the steel anchor beam, the actual distance between the steel anchor beam and the tower template is measured through the accurately positioned steel anchor beam, the actual distance is compared with the corresponding relative distance, and rechecking of the tower template is completed.
Drawings
FIG. 1 is a schematic diagram showing the relative relationship between a tower column template and a steel anchor beam in the embodiment of the invention.
In the figure: 1-steel anchor beam and 2-tower column template.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a method for accurately positioning and rechecking a cable-stayed bridge tower column template based on a steel anchor beam, which specifically includes the following steps:
accurately positioning the position of the steel anchor beam according to the three-dimensional coordinate of the designed steel anchor beam to enable the position to meet the construction specification requirement that the deviation of the three-dimensional coordinate is less than 5mm, and acquiring the elevation and the coordinate of the top surface of the steel anchor beam;
according to the elevation and the coordinate of the top surface of the steel anchor beam and design parameters of the tower column, further, the design parameters comprise bottom surface angular point coordinates, tower column surface slope and the like, and theoretical values of relative distances from the same height position of the side surface of the tower column and the top surface of the steel anchor beam to four sides of the top surface of the steel anchor beam are obtained;
obtaining theoretical values of relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam according to the theoretical values of the relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam;
installing a tower column template;
after the tower column template is installed, measuring actual values of relative distances from four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam, preferably, measuring in a steel tape manner;
and rechecking whether the installed tower column template meets the preset design requirement or not according to the theoretical value and the actual value of the relative distance.
The method comprises the steps of obtaining theoretical values of relative distances from positions, with the same height, of a tower column template 2 to be installed and the top surface of the steel anchor beam 1 to four sides of the top surface of the steel anchor beam through the accurately positioned steel anchor beam 1, measuring actual values of the relative distances from the four sides of the top surface of the steel anchor beam 1 to the installed tower column template 2 with the same height as the top of the steel anchor beam 1 when the tower column template rechecking work is carried out, comparing the actual values of the relative distances with the theoretical values of the relative distances, and completing rechecking check of the tower column template 2.
The method for installing the tower column template specifically comprises the following steps: according to the theoretical values of the relative distances from the same height position of the tower column template to be installed and the top surface of the steel anchor beam to the four edges of the top surface of the steel anchor beam, the tower column template is installed; by obtaining the theoretical values of the relative distances from the same height position of the top surfaces of the tower column template 2 and the steel anchor beam 1 to be installed to the four edges of the top surface of the steel anchor beam and taking the theoretical values of the relative distances as the constraint conditions of tower column template construction on a construction site, the process of erecting the tower column template 2 has very convenient and accurate control basis, the rechecking work can be qualified at one time, multiple rechecks are avoided, and the work efficiency is further improved.
Further, after the tower column template 2 is installed, the top surface of the tower column template 2 is 10cm higher than the top surface of the steel anchor beam 1.
Wherein, the steel anchor beam 1 is accurately positioned by adopting an internal control method; when the steel anchor beam 1 is accurately positioned, the scaffolds and enclosures required by the construction of the tower column template 2 are not erected; the positioning accuracy of the steel anchor beam 1 is 2 mm.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (8)
1. A positioning and rechecking method for accurately positioning a cable-stayed bridge tower column template based on a steel anchor beam is characterized by comprising the following steps:
accurately positioning the position of the steel anchor beam according to the three-dimensional coordinate of the designed steel anchor beam, and acquiring the design elevation and the design coordinate of the top surface of the steel anchor beam;
obtaining theoretical values of relative distances from the positions of the side surface of the tower column and the top surface of the steel anchor beam at the same height to four sides of the top surface of the steel anchor beam according to the design coordinates and the design height of the top surface of the steel anchor beam and the design parameters of the tower column;
obtaining theoretical values of relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam according to the theoretical values of the relative distances from the same-height positions of the side surface of the tower column and the top surface of the steel anchor beam to the four sides of the top surface of the steel anchor beam;
installing a tower column template;
after the tower column template is installed, measuring the actual values of the relative distances from the four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam;
and rechecking whether the installed tower column template meets the preset design requirement or not according to the theoretical value and the actual value of the relative distance.
2. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the installation of the tower column template specifically comprises the following steps: and finishing the installation of the tower column template according to the theoretical value of the relative distance between the same height position of the tower column template to be installed and the top surface of the steel anchor beam and the four edges of the top surface of the steel anchor beam.
3. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: after the tower column template is installed, the top surface of the tower column template is 10cm higher than the top surface of the steel anchor beam.
4. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: and measuring the actual values of the relative distances from the four sides of the top surface of the steel anchor beam to the installed tower column template with the same elevation as the top of the steel anchor beam by using a steel tape.
5. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: and the design parameters of the tower column comprise bottom corner point coordinates and tower column surface slope.
6. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: the steel anchor beam is accurately positioned by adopting an internal control method.
7. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: when the steel anchor beam is accurately positioned, the scaffold and the enclosure required by the construction of the tower column template are not erected.
8. The method for accurately positioning and rechecking the tower column template of the cable-stayed bridge based on the steel anchor beam as claimed in claim 1, wherein the method comprises the following steps: the positioning accuracy of the steel anchor beam is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184470.3A CN111455848A (en) | 2020-03-16 | 2020-03-16 | Positioning and rechecking method for accurately positioning cable-stayed bridge tower column template based on steel anchor beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184470.3A CN111455848A (en) | 2020-03-16 | 2020-03-16 | Positioning and rechecking method for accurately positioning cable-stayed bridge tower column template based on steel anchor beam |
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| CN111455848A true CN111455848A (en) | 2020-07-28 |
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| CN202010184470.3A Pending CN111455848A (en) | 2020-03-16 | 2020-03-16 | Positioning and rechecking method for accurately positioning cable-stayed bridge tower column template based on steel anchor beam |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314004A (en) * | 2014-10-15 | 2015-01-28 | 广东省冶金建筑设计研究院 | Prestressed steel shell concrete cable tower structure for stiffening diagonal struts |
| CN104343086A (en) * | 2014-10-27 | 2015-02-11 | 中铁港航局集团有限公司 | Small-spatial construction method for steel anchor beam anchoring zone of cable-stayed bridge upper pylon |
| CN104731100A (en) * | 2015-03-31 | 2015-06-24 | 北京矿冶研究总院 | Unmanned control method and system for underground scraper |
| CN109468958A (en) * | 2018-11-23 | 2019-03-15 | 中交第三航务工程局有限公司 | A kind of king-tower king-post construction technology |
-
2020
- 2020-03-16 CN CN202010184470.3A patent/CN111455848A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314004A (en) * | 2014-10-15 | 2015-01-28 | 广东省冶金建筑设计研究院 | Prestressed steel shell concrete cable tower structure for stiffening diagonal struts |
| CN104343086A (en) * | 2014-10-27 | 2015-02-11 | 中铁港航局集团有限公司 | Small-spatial construction method for steel anchor beam anchoring zone of cable-stayed bridge upper pylon |
| CN104731100A (en) * | 2015-03-31 | 2015-06-24 | 北京矿冶研究总院 | Unmanned control method and system for underground scraper |
| CN109468958A (en) * | 2018-11-23 | 2019-03-15 | 中交第三航务工程局有限公司 | A kind of king-tower king-post construction technology |
Non-Patent Citations (4)
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| 付建曲等: "鄂东长江公路大桥北索塔施工测量技术", 《施工技术》 * |
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| 田立臣: "《场地设计》", 31 July 2017, 中国建筑工业出版社 * |
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Application publication date: 20200728 |