CN108978485B - Method for on-site installation of anchor plate of steel structure cable-stayed bridge - Google Patents
Method for on-site installation of anchor plate of steel structure cable-stayed bridge Download PDFInfo
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- CN108978485B CN108978485B CN201810974616.7A CN201810974616A CN108978485B CN 108978485 B CN108978485 B CN 108978485B CN 201810974616 A CN201810974616 A CN 201810974616A CN 108978485 B CN108978485 B CN 108978485B
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- steel box
- anchor
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- box girder
- anchor plate
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a steel structure cable-stayed bridge anchor plate field installation method, wherein a steel box girder and an anchor plate are manufactured in a split mode, when the steel box girder is pre-spliced, an installation control point and a positioning datum line of the anchor plate are marked on the steel box girder, after the steel box girder is installed, all the anchor plate installation control points and the positioning datum lines on the steel box girder are retested according to the design installation angle of a stay cable, when the anchor plate is installed on the field, the center line of a bottom plate of the anchor plate is superposed with the positioning datum line on the steel box girder, and the intersection point of the axis extension line of a cable guide pipe of the anchor plate and the top surface of the steel box girder is superposed with the installation control point; and setting plumb lines which are vertically crossed with the orthographic projection line of the axis of the cable guide pipe at the upper end of the anchor pulling plate, adjusting the angle of the anchor pulling plate until the plumb lines point to the positioning datum line of the top surface of the steel box girder, realizing the positioning of the anchor pulling plate, and simultaneously welding and fixing the bottom plate of the anchor pulling plate and the top surface of the steel box girder.
Description
Technical Field
The invention relates to the technical field of municipal steel structure cable-stayed bridge construction, in particular to a cable-stayed bridge anchor plate installation construction control method.
Background
The cable-stayed bridge anchor plate is welded with the main beam on the top surface of the steel main beam, is a key component for transferring the force between the stay cable and the beam body of the cable-stayed bridge, and has high positioning precision requirement. Because the anchor pulling plate is relatively fixed in position on the main beam, in order to ensure the installation precision and save subsequent installation procedures, the anchor pulling plate and the main beam are integrally processed when the steel main beam is processed. However, the main beam is processed uniformly in a processing field, the overall height of the main beam with the anchor pulling plate is high, and when the main beam is transported from the processing field to the installation field, the total height of a steel beam transportation vehicle is often limited by a height-limiting road block or a height-limiting road bridge, so that the vehicle cannot pass smoothly; because the anchor pulling plate and the main beam are fixed in advance, if deviation exists when the steel main beam is installed, the position deviation of the anchor pulling plate can be caused, and the positioning precision of the anchor pulling plate is influenced.
Disclosure of Invention
The invention aims to provide a field installation method of an anchor plate of a steel structure cable-stayed bridge, which is characterized in that a steel main beam and the anchor plate are separately transported to reduce the height of a transport vehicle and avoid traffic limitation and transportation risk in urban areas, and meanwhile, the installation position of the anchor plate can be rechecked when the anchor plate is installed on the field, so that the positioning precision of the anchor plate is improved.
The technical scheme of the invention is as follows:
the field installation method of the anchor plate of the steel structure cable-stayed bridge is characterized by comprising the following steps of:
(1) after all steel box girders of the cable-stayed bridge are processed in a processing field, pre-splicing the steel box girders, pre-assembling anchor pulling plates according to the designed installation positions of the anchor pulling plates on the steel box girders when the steel box girders are pre-spliced, and marking installation control points and positioning reference lines of the anchor pulling plates on the steel box girders, wherein the installation control points are intersection points of the longitudinal axis of an anchor pulling plate cable guide pipe and the top surfaces of the steel box girders, and the positioning reference lines are orthographic projection lines of the longitudinal axis of the anchor pulling cable guide pipe on the steel box girders;
(2) respectively transporting the steel box girder and the anchor plate to a construction site; after the steel box girder is installed and the full bridge is closed, re-measuring all the anchor plate installation control points and positioning datum lines on the steel box girder according to the design installation angle of the stay cable, and re-determining the anchor plate installation control points and the positioning datum lines according to the re-measuring result;
(3) transporting the anchor plate assembly to the steel box girder, pushing the anchor plate to move by using a jack, so that the central line of the anchor plate bottom plate is superposed with a positioning reference line on the steel box girder, and the intersection point of the extension line of the longitudinal axis of the anchor plate cable guide pipe and the top surface of the steel box girder is superposed with an installation control point;
(4) setting a plumb line which is vertically crossed with the orthographic projection line of the longitudinal axis of the cable guide pipe at the upper end of the anchor pull plate, and adjusting the angle of the anchor pull plate by using a turn buckle or a chain block until the plumb line points to the positioning datum line on the top surface of the steel box girder so as to realize the positioning of the anchor pull plate;
(5) and maintaining the positioning state of the anchor plate, and welding and fixing the bottom plate of the anchor plate and the top surface of the steel box girder to complete the field installation of the anchor plate.
The anchor plate and the steel girder are manufactured and transported separately, so that the height of the beam section of the anchor plate can be reduced, the overall height of the steel girder is reduced during transportation in urban areas, and the condition that the beam section is ultrahigh and over-limited during transportation is avoided; after the steel girder is installed, the anchor plate is measured, positioned and installed on site, and the positioning precision of the anchor plate can be ensured.
Drawings
FIG. 1 is a flow chart of the construction of the present invention;
fig. 2 is a schematic diagram of the installation structure of the anchor pulling plate along the bridge direction.
Detailed Description
The construction process of the invention is shown in figure 1, and the concrete process is as follows:
after all steel box girders of the cable-stayed bridge are processed in a processing field, pre-splicing the steel box girders, pre-assembling the anchor plate according to the designed installation position of the anchor plate on the steel box girders when the steel box girders are pre-spliced, marking the installation control point and the positioning datum line of the anchor plate on the steel box girders, wherein the installation control point is the intersection point of the longitudinal axis of the anchor plate cable guide pipe and the top surface of the steel box girders, and the positioning datum line is the orthographic projection extension line of the longitudinal axis of the anchor cable guide pipe on the steel box girders.
And respectively transporting the steel box girder and the anchor plate assembly to a construction site. And after the steel box girder is installed and the full bridge is closed, re-measuring all the anchor plate installation control points and the positioning datum lines on the steel box girder according to the anchoring points of the stay cables on the cable tower and the designed installation angles of the stay cables, and re-determining the installation control and positioning datum lines of the anchor plates according to the re-measuring result.
As shown in figure 2, the anchor plate 1 is conveyed to the steel box girder 2, the jack pushes the anchor plate to move, so that the center line of the anchor plate bottom plate 3 is coincided with a positioning reference line on the steel box girder, and the intersection point of the extension line of the longitudinal axis 5 of the anchor plate cable guide pipe 4 and the top surface of the steel box girder is coincided with an installation control point 6.
And a plumb line 7 which is vertically crossed with the orthographic projection line of the longitudinal axis 5 of the cable guide pipe is arranged at the upper end of the anchor plate 1, and the angle of the anchor plate is adjusted by using a turn buckle or a chain block until the plumb line points to the positioning datum line on the top surface of the steel box girder, so that the anchor plate is positioned.
And maintaining the positioning state of the anchor plate, and welding and fixing the bottom plate of the anchor plate and the top surface of the steel box girder to complete the field installation of the anchor plate.
Claims (1)
1. The field installation method of the anchor plate of the steel structure cable-stayed bridge is characterized by comprising the following steps of:
(1) after all steel box girders of the cable-stayed bridge are processed in a processing field, pre-splicing the steel box girders, pre-assembling anchor pulling plates according to the designed installation positions of the anchor pulling plates on the steel box girders when the steel box girders are pre-spliced, and marking installation control points and positioning reference lines of the anchor pulling plates on the steel box girders, wherein the installation control points are intersection points of the longitudinal axis of an anchor pulling plate cable guide pipe and the top surfaces of the steel box girders, and the positioning reference lines are orthographic projection lines of the longitudinal axis of the anchor pulling cable guide pipe on the steel box girders;
(2) respectively transporting the steel box girder and the anchor plate to a construction site; after the steel box girder is installed and the full bridge is closed, re-measuring all the anchor plate installation control points and positioning datum lines on the steel box girder according to the design installation angle of the stay cable, and re-determining the anchor plate installation control points and the positioning datum lines according to the re-measuring result;
(3) transporting the anchor plate assembly to the steel box girder, pushing the anchor plate to move by using a jack, so that the central line of the anchor plate bottom plate is superposed with a positioning reference line on the steel box girder, and the intersection point of the extension line of the longitudinal axis of the anchor plate cable guide pipe and the top surface of the steel box girder is superposed with an installation control point;
(4) setting a plumb line which is vertically crossed with the orthographic projection line of the longitudinal axis of the cable guide pipe at the upper end of the anchor pull plate, and adjusting the angle of the anchor pull plate by using a turn buckle or a chain block until the plumb line points to the positioning datum line on the top surface of the steel box girder so as to realize the positioning of the anchor pull plate;
(5) and maintaining the positioning state of the anchor plate, and welding and fixing the bottom plate of the anchor plate and the top surface of the steel box girder to complete the field installation of the anchor plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974616.7A CN108978485B (en) | 2018-08-24 | 2018-08-24 | Method for on-site installation of anchor plate of steel structure cable-stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974616.7A CN108978485B (en) | 2018-08-24 | 2018-08-24 | Method for on-site installation of anchor plate of steel structure cable-stayed bridge |
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| Publication Number | Publication Date |
|---|---|
| CN108978485A CN108978485A (en) | 2018-12-11 |
| CN108978485B true CN108978485B (en) | 2020-02-14 |
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| CN201810974616.7A Active CN108978485B (en) | 2018-08-24 | 2018-08-24 | Method for on-site installation of anchor plate of steel structure cable-stayed bridge |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058384B (en) * | 2020-01-13 | 2021-12-07 | 中铁九桥工程有限公司 | Method for mounting anchor plate on steel box girder |
| CN114398692B (en) * | 2021-12-31 | 2024-06-21 | 中铁宝桥集团有限公司 | Method for determining spatial position of special-shaped anchor plate on top surface of steel box girder |
| CN114250715B (en) * | 2022-02-15 | 2024-04-26 | 中铁二局集团有限公司 | Positioning method and positioning device for space special-shaped steel arch bridge inhaul cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101538730B1 (en) * | 2012-01-12 | 2015-07-23 | (주)태영이씨엠 | Slab-type box girder of a varying longitudinal section made by prestressed precast concrete and method constructing the bridge therewith |
| CN205653703U (en) * | 2016-04-27 | 2016-10-19 | 中国电建集团昆明勘测设计研究院有限公司 | Suspension bridge anchorage anchoring device |
| CN106592441A (en) * | 2017-01-16 | 2017-04-26 | 中交路桥华南工程有限公司 | Mounting method of stayed cable of cable-stayed bridge |
| CN106948263B (en) * | 2017-05-10 | 2019-02-19 | 安徽省交通控股集团有限公司 | A kind of cable-stayed bridge concrete pylon anchor tie plate |
| CN107268421B (en) * | 2017-08-11 | 2022-11-01 | 湖南省交通规划勘察设计院有限公司 | Cable-stayed bridge cable-girder anchoring assembly with spatial cable-plane steel truss girder and spatial cable-plane steel truss girder cable-stayed bridge |
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| CN108978485A (en) | 2018-12-11 |
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