CN110080083B - Method for installing basket type steel truss arch main chord member - Google Patents
Method for installing basket type steel truss arch main chord member Download PDFInfo
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- CN110080083B CN110080083B CN201910496424.4A CN201910496424A CN110080083B CN 110080083 B CN110080083 B CN 110080083B CN 201910496424 A CN201910496424 A CN 201910496424A CN 110080083 B CN110080083 B CN 110080083B
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- main chord
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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
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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
- E01D21/10—Cantilevered erection
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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
- E01D4/00—Arch-type 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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a method for installing a basket type steel truss arch main chord. The method is completed by the coordination and the coordination of a steel truss arch main chord, a lifting lug, a lifting appliance, a transverse connecting system, lifting equipment and the like. The invention controls the inclination angle of the main chord by the length of the lifting lugs arranged on the main chord: the length difference between the inner lifting lug and the outer lifting lug is determined through accurate calculation, so that the main chord reaches the inward-inclination angle of installation and positioning when being lifted, and the defects that the inward-inclination angle of the main chord is not easy to adjust in the air and the monitoring and measuring are difficult are reduced; the adduction distance of the main chord is controlled by arranging a transverse connection system: the front end and the rear end of the main chord are respectively provided with the steel wire rope and the guide chain, after the rod piece is lifted off the ground, the distance between the front end and the rear end of the main chord is adjusted to be a set value through the guide chain, the attitude adjustment of the adduction distance of the main chord is simply and accurately finished under the condition that the hoisting load of hoisting equipment except the main chord is not increased, the weight of measures except bridge rod pieces is reduced, and the efficiency of the attitude adjustment of the rod piece in the air is effectively improved.
Description
Technical Field
The invention relates to the technical field of hoisting of large-span steel truss arches, in particular to a method for installing a basket type steel truss arch main chord member.
Background
The hoisting chord member in the existing arch bridge construction is mainly hoisted by the whole section of a carrying pole beam or a single rib or single rod piece, the whole section hoisting is limited by hoisting equipment, the span is required to be large, the tonnage is required to be large, a strong carrying pole beam needs to be arranged, and extra hoisting weight is increased to a great extent; because basket arch cross bridge is to span change greatly, unilateral member hoist and mount need horizontal adjusting device, nevertheless sets up a powerful anchor point in the high altitude of cantilever and implements very difficultly, and the risk is very big, and the posture adjustment content of basket arch member hoist and mount mainly divide into three kinds: elevation angle, inclination angle and adduction distance, wherein the inclination angle and adduction distance are difficult points for hoisting, and the inclination angle of the rod piece is difficult to adjust and monitor and measure in the air.
Disclosure of Invention
The invention aims to solve the problems, and provides a method for mounting a basket type steel truss arch main chord member, which reduces the weight of measures except for bridge member members and effectively improves the efficiency of adjusting the posture of the member members in the air.
The invention solves the problems and adopts the technical scheme that:
a method for installing a main chord of a basket type steel truss arch comprises the following steps:
(1) the two main chords are respectively arranged on two sides of the steel truss arch, four lifting lugs are installed on the upper end face of each main chord, the four lifting lugs are symmetrically arranged at four right-angle positions of the upper end face of the main chord respectively, the length of the lifting lug positioned on the inner side is different from that of the lifting lug positioned on the outer side, the inner inclination angle of the main chord is controlled through the length of the lifting lug on the main chord, and the length difference of the lifting lugs on the inner side and the outer side is determined through accurate calculation, so that the inner inclination angle of the main chord during installation is achieved just when the main chord is lifted;
(2) the lifting lugs and the lifting equipment are respectively connected from top to bottom by utilizing a lifting appliance, the lifting lugs on the inner sides of the two main chords are connected through a transverse connecting system, so that the two main chords are connected, the transverse connecting system comprises a steel wire rope and a guide chain, the two lifting lugs on the inner side of one main chord are respectively connected with the steel wire rope, the two lifting lugs on the inner side of the other main chord are respectively connected with the guide chain, then the steel wire rope is connected with the corresponding guide chain, and at the moment, the steel wire rope and the guide chain are in a loose state;
(3) hoisting equipment is utilized to hoist the main chords away from the ground, then hoisting is stopped, constructors move to the upper end faces of the main chords, the distances between the front ends and the rear ends of the two main chords are adjusted to be set values through opposite-pull guide chains, and the adduction distances of the main chords are adjusted in place;
(4) after the operator leaves, the elevation angle of the main chord reaches a set value by adjusting the height difference of the front and rear lifting hooks of the lifting equipment, and finally the steel truss arch main chord is lifted to a specified position by the cable crane according to a preset track.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
the method controls the inclination angle of the main chord by the length of the lifting lugs arranged on the main chord: the length difference between the inner lifting lug and the outer lifting lug is determined through accurate calculation, so that the main chord reaches the inward-inclination angle of installation and positioning when being lifted, and the defects that the inward-inclination angle of the main chord is not easy to adjust in the air and the monitoring and measuring are difficult are reduced; the adduction distance of the main chord is controlled by arranging a transverse connection system: the front end and the rear end of the main chord are respectively provided with the steel wire rope and the guide chain, after the rod piece is lifted off the ground, the distance between the front end and the rear end of the main chord is adjusted to be a set value through the guide chain, the attitude adjustment of the adduction distance of the main chord is simply and accurately finished under the condition that the hoisting load of hoisting equipment except the main chord is not increased, the weight of measures except bridge rod pieces is reduced, and the efficiency of the attitude adjustment of the rod piece in the air is effectively improved.
Preferably, the further technical scheme of the invention is as follows:
the main chord is connected with the lifting lug through a high-strength bolt; the lifting appliance is connected with the lifting lugs through the clamping rings and adopts flexible lifting belts; the lifting appliance is hooked on a lifting hook of the lifting equipment, and the lifting equipment is a cable crane.
Drawings
FIG. 1 is a schematic front view of an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the enlarged structure of A in FIG. 1;
FIG. 3 is a schematic top view of the structure of FIG. 1;
FIG. 4 is a schematic left side view of the structure of FIG. 1;
in the figure: a main chord 1; a lifting lug 2; a high-strength bolt 3; a reinforcing rib plate 4; a snap ring 5; a hanger 6; a cable crane hook 7; a wire rope 8; and a guide chain 9.
The specific implementation mode is as follows:
the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
Referring to fig. 1, 2, 3 and 4, a method for installing a basket-type steel truss arch main chord includes the following steps:
(1) two main chords 1 are respectively arranged on two sides of a steel truss arch, four lifting lugs 2 are arranged on the upper end face of each main chord 1, the main chords 1 are connected with the lifting lugs 2 through high-strength bolts 3, the four lifting lugs 2 are symmetrically arranged on four right-angle positions of the upper end face of the main chord 1 respectively, the lifting lugs 2 on the inner side are different from the lifting lugs 2 on the outer side in length, the inclination angles of the main chords 1 are controlled through the lengths of the lifting lugs 2 on the main chords 1, the length difference of the lifting lugs 2 on the inner side and the outer side is determined through accurate calculation, and the main chords 1 are enabled to reach the inclination angles during installation when being lifted.
(2) Utilize hoist 6 to connect lug 2 and cable crane lifting hook 7 from top to bottom respectively, hoist 6 passes through snap ring 5 and is connected with lug 2, hoist 6 adopts flexible suspender, hoist 6 hangs on cable crane lifting hook 7, thereby connect two main chords 1 through the transverse connection system between the inboard lug 2 of two main chords 1, the transverse connection system includes wire rope 8 and leads chain 9, two lugs 2 of one of them main chord 1 inboard are connected with wire rope 8 respectively, two lugs 2 of another main chord 1 inboard are connected with respectively lead chain 9, then couple together wire rope 8 and the chain 9 that leads that corresponds, wire rope 8 and lead chain 9 are in lax state this moment.
(3) The main chord 1 is lifted off the ground by using the cable crane and then the lifting is stopped, the constructor moves to the upper end surface of the main chord 1, the distances between the front ends and the rear ends of the two main chords 1 are adjusted to a set value through the opposite-pull guide chains 9, and the adduction distance of the main chord 1 is adjusted to be in place.
(4) After the operator leaves, the elevation angle of the main chord 1 reaches a set value by adjusting the height difference of the front cable crane hook 7 and the rear cable crane hook 7 of the main chord 1, and finally the main chord 1 is lifted to a specified position by the cable crane according to a preset track.
The lifting lug 2 is formed by welding a bottom plate and a vertical plate, reinforcing rib plates 4 are welded between two sides of the vertical plate and the bottom plate, bolt holes are processed in the bottom plate, mounting holes matched with snap rings 5 are processed in a vertical plate, connecting holes used for connecting a steel wire rope 8 with a guide chain 9 are processed in the reinforcing rib plates 4 of the lifting lug 2 located on the inner side of the main chord 1, four lifting lugs 2 are arranged on the top surface of each main chord 1, the main chord 1 is connected with the lifting lugs 2 through high-strength bolts 3, bolt holes are formed in the main chord 1 and the lifting lugs 2, the number of the bolt holes reserved in each lifting lug 2 is determined through calculation, and the high-strength bolts 3 penetrate through the bolt holes in the main chord 1 and the lifting lugs 2 respectively.
The transverse connection system comprises a steel wire rope 8 and a guide chain 9, one end of the steel wire rope 8 is connected with the lifting lug 2 on the inner side of the upper end face of one main chord 1, the other end of the steel wire rope 8 is connected with one end of the guide chain 9, and the other end of the guide chain 9 is connected with the lifting lug 2 on the inner side of the upper end face of the other main chord 1.
The included angle between the connecting line of the central points of the hanging holes at the upper parts of the two lifting lugs 2 at the inner side and the outer side of the main chord 1 and the top surface of the main chord 1 is equal to the inner inclination angle of the main chord 1.
The method controls the inner inclination angle of the main chord 1 through the length of the lifting lugs 2 arranged on the main chord 1, and determines the length difference of the inner lifting lug and the outer lifting lug 2 through accurate calculation, so that the main chord 1 reaches the inner inclination angle of installation and positioning when being lifted, and the defects that the inner inclination angle of the main chord 1 is difficult to adjust in the air and difficult to monitor and measure are reduced; according to the method, the adduction distance of the main chord 1 is controlled by arranging the transverse connection system, the front end and the rear end of the main chord 1 are respectively pulled by one steel wire rope 8 and one guide chain 9, after the main chord 1 is lifted off the ground, the distance between the front end and the rear end of the main chord 1 is adjusted to be a set value by the pull guide chain 9, the attitude adjustment of the adduction distance of the main chord 1 is simply and accurately finished under the condition that the hoisting load of hoisting equipment except the main chord 1 is not increased, the weight of measures except bridge members is reduced, and the efficiency of the attitude adjustment of the members in the air is effectively improved.
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 scope of the present invention, which is defined in the appended claims.
Claims (1)
1. A method for installing a main chord of a basket type steel truss arch is characterized by comprising the following steps:
(1) the two main chords are respectively arranged on two sides of the steel truss arch, four lifting lugs are installed on the upper end face of each main chord, the four lifting lugs are symmetrically arranged at four right-angle positions of the upper end face of the main chord respectively, the length of the lifting lug positioned on the inner side is different from that of the lifting lug positioned on the outer side, the inner inclination angle of the main chord is controlled through the length of the lifting lug on the main chord, and the length difference of the lifting lugs on the inner side and the outer side is determined through accurate calculation, so that the inner inclination angle of the main chord during installation is achieved just when the main chord is lifted;
(2) the lifting lugs and the lifting equipment are respectively connected from top to bottom by utilizing a lifting appliance, the lifting lugs on the inner sides of the two main chords are connected through a transverse connecting system, so that the two main chords are connected, the transverse connecting system comprises a steel wire rope and a guide chain, the two lifting lugs on the inner side of one main chord are respectively connected with the steel wire rope, the two lifting lugs on the inner side of the other main chord are respectively connected with the guide chain, then the steel wire rope is connected with the corresponding guide chain, and at the moment, the steel wire rope and the guide chain are in a loose state;
(3) hoisting equipment is utilized to hoist the main chords away from the ground, then hoisting is stopped, constructors move to the upper end faces of the main chords, the distances between the front ends and the rear ends of the two main chords are adjusted to be set values through opposite-pull guide chains, and the adduction distances of the main chords are adjusted in place;
(4) after an operator leaves, the elevation angle of the main chord reaches a set value by adjusting the height difference of front and rear lifting hooks of the lifting equipment, and finally the steel truss arch main chord is lifted to a specified position by the cable crane according to a preset track;
the main chord is connected with the lifting lug through a high-strength bolt; the lifting appliance is connected with the lifting lugs through the clamping rings and adopts flexible lifting belts; the lifting appliance is hooked on a lifting hook of the lifting equipment, and the lifting equipment is a cable crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496424.4A CN110080083B (en) | 2019-06-10 | 2019-06-10 | Method for installing basket type steel truss arch main chord member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496424.4A CN110080083B (en) | 2019-06-10 | 2019-06-10 | Method for installing basket type steel truss arch main chord member |
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| CN110080083A CN110080083A (en) | 2019-08-02 |
| CN110080083B true CN110080083B (en) | 2021-08-20 |
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| CN201910496424.4A Active CN110080083B (en) | 2019-06-10 | 2019-06-10 | Method for installing basket type steel truss arch main chord member |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409322B (en) * | 2019-08-27 | 2024-05-31 | 中铁二局集团有限公司 | Bridge steel upright post hoisting and turning device and turning method |
| CN113668391A (en) * | 2021-08-03 | 2021-11-19 | 中交路桥建设有限公司 | Double-width arch rib synchronous installation method of half-through steel box basket arch bridge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07196284A (en) * | 1994-01-06 | 1995-08-01 | Penta Ocean Constr Co Ltd | Suspension having hydraulic cylinder |
| DE202013104215U1 (en) * | 2013-09-16 | 2013-10-16 | Richard Bauer Rohstoff-Großhandel GmbH & Co. KG | Lifting frame for holding waste containers |
| US10259687B2 (en) * | 2016-02-25 | 2019-04-16 | Clayton P. Myers | End cap and spreader bar system and method for sizing same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252082A (en) * | 1994-03-15 | 1995-10-03 | Nippon Steel Corp | Plural load lifting device and setting method thereof |
| CN2644490Y (en) * | 2003-06-09 | 2004-09-29 | 上海市基础工程公司 | Hoisting, installing and adjusting device for large tonnage arch rib |
| CN202098976U (en) * | 2011-05-10 | 2012-01-04 | 中交第二航务工程局有限公司 | Device capable of freely adjusting sling length and overhead transverse posture of part |
| CN102556835A (en) * | 2012-02-08 | 2012-07-11 | 中铁大桥局集团第五工程有限公司 | Suspender capable of adjusting spatial angle of rod member of steel truss bridge |
| CN102733310B (en) * | 2012-06-29 | 2014-09-24 | 中铁大桥局集团有限公司 | Lifting construction method for arch rib segments of steel box handle-basket arch bridge |
| CN204355946U (en) * | 2014-12-22 | 2015-05-27 | 安徽伟宏钢结构集团股份有限公司 | A kind of device lifting large wt pts |
| CN107338733B (en) * | 2017-08-11 | 2023-06-06 | 中铁上海工程局集团有限公司 | Hoisting device and hoisting method for adjusting and positioning overhead posture of steel box arch rib |
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2019
- 2019-06-10 CN CN201910496424.4A patent/CN110080083B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07196284A (en) * | 1994-01-06 | 1995-08-01 | Penta Ocean Constr Co Ltd | Suspension having hydraulic cylinder |
| DE202013104215U1 (en) * | 2013-09-16 | 2013-10-16 | Richard Bauer Rohstoff-Großhandel GmbH & Co. KG | Lifting frame for holding waste containers |
| US10259687B2 (en) * | 2016-02-25 | 2019-04-16 | Clayton P. Myers | End cap and spreader bar system and method for sizing same |
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| CN110080083A (en) | 2019-08-02 |
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Effective date of registration: 20210803 Address after: 300000 Shuanggang Township, Jinnan District, Tianjin Applicant after: CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. Applicant after: THE 2ND ENGINEERING CO., LTD OF CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. Applicant after: China Railway 18th Bureau Group South Engineering Co., Ltd Address before: 064000 No.14 community, Fengrun District, Tangshan City, Hebei Province (No.8, Guanghua Road) Applicant before: THE 2ND ENGINEERING CO., LTD OF CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. Applicant before: CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. |
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