CN114657891A - Method for mounting upper cross beam of bridge tower steel structure - Google Patents
Method for mounting upper cross beam of bridge tower steel structure Download PDFInfo
- Publication number
- CN114657891A CN114657891A CN202210423415.4A CN202210423415A CN114657891A CN 114657891 A CN114657891 A CN 114657891A CN 202210423415 A CN202210423415 A CN 202210423415A CN 114657891 A CN114657891 A CN 114657891A
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- lifting
- cross beam
- sliding
- upper cross
- equipment
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for installing an upper cross beam of a bridge tower steel structure, which relates to the technical field of bridge construction, and comprises the steps of constructing an embedded part, installing a lifting support, paving a sliding rail on the top surface of a box girder, placing a sliding plate on the sliding rail, adopting a crane to lift the box girder to a bridge floor, splicing the box girder into a whole, then falling on the sliding plate, fixedly connecting the sliding plate and the upper cross beam by welding, installing four lifting lugs on the top surface of the upper cross beam, installing two sets of sliding equipment, and controlling the two sets of sliding equipment by a set of system to ensure synchronous sliding; by adopting the sliding lifting method, the high-altitude installation of large-scale components can be realized under the condition that the large-scale floating crane cannot enter the field.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a method for mounting an upper beam of a bridge tower steel structure.
Background
The existing installation method of the bridge tower steel structure upper cross beam generally adopts a floating crane for installation, and the floating crane installation has the following defects:
1. for a large-size and large-tonnage upper beam, the hoisting capacity of the floating crane is limited, and the installation requirement is difficult to meet;
2. the height of an upper beam of a bridge tower is usually high, and for urban bridge reconstruction and extension projects, particularly for high-altitude hoisting of large components, the conditions of all aspects are restricted, and the hoisting space of a floating crane is limited;
3. the inland river navigation grade is lower, and the built bridge navigation headroom is smaller, and large-scale floating crane can not enter the field.
Therefore, it is necessary to design a new installation method to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for mounting an upper cross beam of a bridge tower steel structure, which aims to overcome the defects caused in the prior art.
A method for mounting an upper beam of a bridge tower steel structure comprises the following steps:
(1) constructing an embedded part when the main tower is constructed to the design position of the upper cross beam;
(2) continuing constructing the main tower, and installing a lifting bracket;
(3) laying a sliding rail on the top surface of the box girder, and placing a sliding plate on the sliding rail;
(4) the upper cross beam is processed in sections and transported to a construction site, the upper cross beam is hung to a bridge floor by a crane and spliced into a whole and then falls on the sliding plate, and the sliding plate and the upper cross beam are fixedly connected by welding to ensure stability in the sliding process;
(5) four lifting lugs are arranged on the top surface of the upper cross beam, and two sets of sliding equipment are arranged and controlled by a set of system to ensure synchronous sliding;
(6) starting the two sets of sliding equipment, synchronously sliding the upper cross beam to the middle position of the two main towers, namely the position right below the designed position, wherein the stroke error of the two sets of sliding equipment is less than or equal to 10mm in the sliding process, removing the sliding equipment after the sliding equipment slides in place, and removing the connection between the sliding plate and the upper cross beam;
(7) four sets of lifting equipment are arranged at the top of the lifting support and controlled by a set of system to ensure synchronous lifting, and during installation, each set of lifting equipment is ensured to be aligned with the center of the corresponding lifting lug, and the error is less than or equal to 5 mm;
(8) penetrating a lifting steel strand on each set of lifting equipment, and anchoring a bottom anchor bracket at the tail end of the steel strand;
(9) connecting the bottom anchor bracket with a lifting lug, and starting lifting equipment to enable the lifting steel strand to be basically kept in a vertical state;
(10) starting lifting equipment, pre-lifting the upper cross beam, wherein the pre-lifting height is about 30cm, observing the spatial position of the upper cross beam, and ensuring the upper cross beam to be in a horizontal state and a right middle position;
(11) continuously starting the lifting equipment to synchronously lift the upper cross beam to the designed installation position, and connecting the upper cross beam with embedded parts on two sides into a whole, wherein the stroke errors of the four sets of lifting equipment are less than or equal to 5mm in the lifting process;
(12) and (5) after the installation is finished, dismantling temporary facilities such as a lifting support, a lifting lug and lifting equipment.
The invention has the advantages that:
1. by adopting the sliding lifting method, the conventional lifting equipment can be replaced, the field space required by lifting is reduced, and the external restriction interference is small.
2. By adopting a sliding lifting method, the high-altitude installation of large-scale components can be realized under the condition that the large-scale floating crane cannot enter the field.
Drawings
Fig. 1 is a schematic view of the installation of the present invention.
Fig. 2 is a schematic view of the connection between the upper cross beam and the box girder in the present invention.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Wherein: the device comprises an upper cross beam 1, a sliding plate 2, a sliding track 3, a box girder 4, a lifting lug 5, a sliding device 6, a bottom anchor support 7, a steel strand 8, a lifting device 9, a lifting support 10, an embedded part 11 and a main tower 12.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, a method for installing a cross beam on a bridge tower steel structure comprises the following steps:
(1) constructing an embedded part 11 when a main tower 12 is constructed at the designed position of the upper cross beam 1;
(2) continuing to construct the main tower 12 and installing the lifting support 10;
(3) laying a sliding rail 3 on the top surface of the box girder 4, and placing a sliding plate 2 on the sliding rail 3;
(4) the upper crossbeam 1 is processed in sections and transported to a construction site, the upper crossbeam is hung to a bridge floor by a crane to be spliced into a whole and then falls on the sliding plate 2, and the sliding plate 2 and the upper crossbeam 1 are fixedly connected by welding to ensure stability in the sliding process;
(5) four lifting lugs 5 are arranged on the top surface of the upper cross beam 1, and two sets of sliding equipment 6 are arranged, wherein the two sets of sliding equipment 6 are controlled by one set of system, so that synchronous sliding can be ensured;
(6) starting two sets of sliding devices 6, synchronously sliding the upper cross beam 1 to the middle position of the two main towers 12, namely under the design position, wherein the stroke error of the two sets of sliding devices 6 in the sliding process is less than or equal to 10mm, detaching the sliding devices 6 after the sliding devices are in place, and removing the connection between the sliding plate 2 and the upper cross beam 1;
(7) four sets of lifting equipment 9 are arranged at the top of the lifting support 10, the four sets of lifting equipment 9 are controlled by a set of system, synchronous lifting can be guaranteed, each set of lifting equipment 9 is required to be aligned with the center of the corresponding lifting lug 5 during installation, and the error is less than or equal to 5 mm;
(8) each set of lifting equipment 9 is penetrated with a lifting steel strand 8, and the bottom anchor bracket 7 is anchored at the tail end of the steel strand 8;
(9) connecting the bottom anchor bracket 7 with the lifting lugs 5, and starting the lifting equipment 9 to enable the lifting steel strands 8 to be basically kept in a vertical state;
(10) starting a lifting device 9, pre-lifting the upper cross beam 1, observing the spatial position of the upper cross beam 1 to ensure that the upper cross beam is in a horizontal state and in the middle of the upper cross beam, wherein the pre-lifting height is about 30 cm;
(11) continuously starting the lifting equipment 9 to synchronously lift the upper cross beam 1 to the designed installation position, and connecting the upper cross beam and the embedded parts 11 on the two sides into a whole, wherein the stroke errors of the four sets of lifting equipment 9 are less than or equal to 5mm in the lifting process;
(12) and (5) after the installation is finished, dismantling temporary facilities such as a lifting support, a lifting lug and lifting equipment.
The invention adopts a sliding lifting method, can replace conventional lifting equipment, reduces the field space required by lifting, and has less external restriction interference. In addition, the invention also adopts a sliding lifting method, and can realize the high-altitude installation of large-scale components under the condition that the large-scale floating crane cannot enter the field.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (4)
1. A method for mounting an upper beam of a bridge tower steel structure is characterized by comprising the following steps:
(1) when the main tower (12) is constructed to the design position of the upper cross beam (1), constructing an embedded part (11);
(2) continuing to construct the main tower (12) and installing the lifting bracket (10);
(3) laying a sliding track (3) on the top surface of the box girder (4), and placing a sliding plate (2) on the sliding track (3);
(4) the upper cross beam (1) is processed in sections and transported to a construction site, a crane is adopted to hoist the bridge deck to be spliced into a whole and then fall on the sliding plate (2), and the sliding plate (2) and the upper cross beam (1) are fixedly connected in a welding manner, so that stability in the sliding process is ensured;
(5) four lifting lugs (5) are arranged on the top surface of the upper cross beam (1), two sets of sliding equipment (6) are arranged, and the two sets of sliding equipment (6) are controlled by one set of system to ensure synchronous sliding;
(6) starting the two sets of sliding devices (6), synchronously sliding the upper cross beam (1) to the middle position of the two main towers (12), namely the position right below the design position, removing the sliding devices (6) after the sliding devices (6) slide in place, and removing the connection between the sliding plate (2) and the upper cross beam (1);
(7) four sets of lifting equipment (9) are arranged at the top of the lifting support (10), the four sets of lifting equipment (9) are controlled by a set of system to ensure synchronous lifting, and each set of lifting equipment (9) is required to be aligned with the center of the corresponding lifting lug (5) during installation;
(8) each set of lifting equipment (9) is penetrated with a lifting steel strand (8), and the bottom anchor bracket (7) is anchored at the tail end of the steel strand (8);
(9) connecting the bottom anchor bracket (7) with the lifting lug (5), and starting a lifting device (9) to ensure that the lifting steel strand (8) is basically kept in a vertical state;
(10) starting a lifting device (9), pre-lifting the upper cross beam (1), observing the spatial position of the upper cross beam (1) by a pre-lifting height of 30cm, and ensuring that the upper cross beam is in a horizontal state and in the middle;
(11) continuously starting the lifting equipment (9) to synchronously lift the upper cross beam (1) to a designed installation position, and connecting the upper cross beam and the embedded parts (11) on the two sides into a whole;
(12) and (5) after the installation is finished, removing temporary facilities such as the lifting support (10), the lifting lug (5), the lifting equipment (9) and the like.
2. The method for installing the upper cross beam of the bridge tower steel structure according to claim 1, wherein in the step (6), the stroke error of two sets of sliding equipment (6) in the sliding process is less than or equal to 10 mm.
3. The method for installing the upper cross beam of the bridge tower steel structure according to claim 2, wherein in the step (7), each set of lifting equipment (9) is ensured to be aligned with the center of the corresponding lifting lug (5) during installation, and the error is less than or equal to 5 mm.
4. The method for installing the upper cross beam of the bridge tower steel structure according to claim 1, wherein in the step (11), the stroke error of four sets of lifting equipment (9) in the lifting process is less than or equal to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423415.4A CN114657891A (en) | 2022-04-21 | 2022-04-21 | Method for mounting upper cross beam of bridge tower steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423415.4A CN114657891A (en) | 2022-04-21 | 2022-04-21 | Method for mounting upper cross beam of bridge tower steel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114657891A true CN114657891A (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210423415.4A Pending CN114657891A (en) | 2022-04-21 | 2022-04-21 | Method for mounting upper cross beam of bridge tower steel structure |
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| Country | Link |
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| CN (1) | CN114657891A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1347771A (en) * | 1970-04-03 | 1974-02-27 | Etat Francais Ministere De Leq | Safety barrier |
| CN101078198A (en) * | 2007-07-04 | 2007-11-28 | 湖南省交通规划勘察设计院 | Steel box beam erection method for self-anchored suspension bridge |
| CN101122114A (en) * | 2007-09-14 | 2008-02-13 | 中铁大桥局集团第五工程有限公司 | Back-cable-free cable-stayed bridge steel tower vertical turn construction method |
| CN101122115A (en) * | 2007-08-03 | 2008-02-13 | 中铁一局集团有限公司 | Construction method for tower crane shift |
| CN110004829A (en) * | 2018-11-27 | 2019-07-12 | 中国核工业华兴建设有限公司 | A kind of steel arch tower method for improving |
| CN113652948A (en) * | 2020-05-12 | 2021-11-16 | 中铁二院工程集团有限责任公司 | High-speed railway cable-stayed bridge with improved rigidity |
| CN215366837U (en) * | 2021-01-27 | 2021-12-31 | 中建桥梁有限公司 | Supporting device for bridge tower cross beam construction |
-
2022
- 2022-04-21 CN CN202210423415.4A patent/CN114657891A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1347771A (en) * | 1970-04-03 | 1974-02-27 | Etat Francais Ministere De Leq | Safety barrier |
| CN101078198A (en) * | 2007-07-04 | 2007-11-28 | 湖南省交通规划勘察设计院 | Steel box beam erection method for self-anchored suspension bridge |
| CN101122115A (en) * | 2007-08-03 | 2008-02-13 | 中铁一局集团有限公司 | Construction method for tower crane shift |
| CN101122114A (en) * | 2007-09-14 | 2008-02-13 | 中铁大桥局集团第五工程有限公司 | Back-cable-free cable-stayed bridge steel tower vertical turn construction method |
| CN110004829A (en) * | 2018-11-27 | 2019-07-12 | 中国核工业华兴建设有限公司 | A kind of steel arch tower method for improving |
| CN113652948A (en) * | 2020-05-12 | 2021-11-16 | 中铁二院工程集团有限责任公司 | High-speed railway cable-stayed bridge with improved rigidity |
| CN215366837U (en) * | 2021-01-27 | 2021-12-31 | 中建桥梁有限公司 | Supporting device for bridge tower cross beam construction |
Non-Patent Citations (2)
| Title |
|---|
| 俞沛然: "门式桥塔上横梁提升安装施工关键技术", 工程施工技术, no. 17, 30 September 2021 (2021-09-30), pages 182 - 183 * |
| 郭正兴: "土木工程施工 第3版", vol. 1, 30 September 2007, 东南大学出版社, pages: 268 * |
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