CN112030764A - Top-pulling device and method for adjusting closure opening of steel truss girder - Google Patents
Top-pulling device and method for adjusting closure opening of steel truss girder Download PDFInfo
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- CN112030764A CN112030764A CN202010922655.XA CN202010922655A CN112030764A CN 112030764 A CN112030764 A CN 112030764A CN 202010922655 A CN202010922655 A CN 202010922655A CN 112030764 A CN112030764 A CN 112030764A
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- steel truss
- truss girder
- closure
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- connecting 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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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge construction, and discloses a construction method for adjusting and controlling the closure position of a steel truss girder. The invention comprises a supporting seat, a jacking seat and a jack. The supporting seat and the top pulling seat are connected with the closure steel truss girder; the supporting seat and the top pulling seat are connected with the closure steel truss in a high-strength bolt connection mode; the jacking and pulling device for adjusting the closure opening of the steel truss girder has the advantages that jacking and pulling actions are carried out on the steel truss girder in a mode of adjusting the position by a jack, so that the longitudinal coordinate of cantilever closure of the steel truss girder is ensured, and the difficulty in resisting closure of the steel girder is reduced. The invention saves a large amount of temporary supports and inhaul cables on the premise of ensuring safety, saves cost and accelerates construction progress.
Description
Technical Field
The invention belongs to the technical field of bridge engineering construction, and particularly relates to impact safety protection between ships and construction areas during working hours of a bridge frame facility in a busy water area, in particular to a jacking device and a jacking method for adjusting a closure opening of a steel truss.
Background
From the beginning of reform development, the economic strength and comprehensive national strength of China are increased unprecedentedly, and meanwhile, more brilliant achievements are created in the aspects of infrastructure construction, scientific research and design of China, wherein China rises rapidly in the aspect of bridge construction, and in recent years, highway bridges of China are increased at the speed of 2.7 ten thousand seats per year on average. By the end of 2015, national highway bridges reach 77.9 thousands of seats, and become the first bridge major country in the world. Nowadays, bridge construction in China is not limited to aspects of functionality, safety, economy and the like, but develops towards aspects of larger span, greater difficulty, more novelty, beautiful shape and the like.
Because the terrain conditions in China are complex and various, mountains are mixed and rivers are numerous, and simultaneously with the continuous development and perfection of road network construction, bridge construction projects crossing two sides of rivers are more and more, and the condition that the construction water areas and the navigation paths of large river-crossing bridge projects are overlapped with each other appears in large quantity while the regional economy and intercommunication are pulled, so that the influence of ship navigation on different degrees of each stage of bridge construction is caused, and the risk of construction on water is increased.
The existing closure construction method of the steel truss girder flexible arch bridge is roughly divided into the following 3 types: 1. and closing the sling tower frame by a bidirectional suspension splicing frame method. The sling tower frame is huge special equipment, the technical requirement is high, and the safety risk is high; large investment of field and equipment and high cost. 2. The temporary pier-assisted bidirectional suspended splicing closure method has the advantages of multiple closure temporary facilities, high precision requirement of the temporary facilities and high cost investment. 3. The steel truss girder multi-point pushing closure method has the disadvantages that large-scale equipment is difficult to invest in multi-process control and closure difficulty is high.
Disclosure of Invention
The invention provides a top pulling device and a top pulling method for adjusting a closure opening of a steel truss girder, aiming at solving the technical problems that the existing closure construction method of a steel truss girder flexible arch bridge has huge equipment and large-scale equipment is used to influence the traffic passage under the bridge.
The top pulling device for adjusting the closure opening of the steel truss girder is realized by adopting the following technical scheme: a top pulling device for adjusting a closure opening of a steel truss girder comprises a connecting plate and a pair of top pulling seats fixed at two ends of the connecting plate, wherein a long hole is formed in the part of the connecting plate, which is positioned between the two top pulling seats; the supporting seat is positioned in the long hole, a jack is horizontally arranged on the supporting seat, and the movable end of the jack props against one of the jacking seats; one end of the connecting plate is arranged on the surface of one steel truss girder rod piece to be closed, and the supporting seat is arranged on the surface of the other steel truss girder rod piece to be closed.
The device adopted by the invention reduces the use of temporary supports, avoids the occupation of time and space, saves the cost and accelerates the construction progress. The installation is simple and convenient, reduces the potential safety hazard, reduces the construction degree of difficulty. The device adopted by the invention is simple and convenient to install, has low construction cost, reduces potential safety hazards and reduces construction difficulty.
The top pulling method for adjusting the closure opening of the steel truss girder is realized by adopting the following technical scheme: a top pulling method for adjusting a closure opening of a steel truss girder is characterized in that at least one pair of top pulling devices are symmetrically arranged on the surface of the steel truss girder to be closed; one end of the connecting plate is arranged on the surface of the second steel truss girder rod piece, and the other end of the connecting plate extends to the surface of the first steel truss girder rod piece but is not connected with the first steel truss girder rod piece; the supporting seat is arranged on the first steel truss girder rod piece through the long hole on the connecting plate; during pushing operation, the jack faces the top-pull seat at one end of the connecting plate and pushes the top-pull seat to realize pushing; during the pulling operation, the jack faces the pulling seat at the other end of the connecting plate and pushes the pulling seat to realize pulling.
The top pulling device with a simple structure is adopted, and the position adjustment of the closure opening of the steel truss girder is realized through the top pulling operation, so that the closure construction of the steel truss girder is completed. All used devices are installed on the steel truss girder, the problem that the ground/water traffic is influenced in the use of the past large-scale hoisting equipment is effectively avoided, the scheme is simple, the operation is convenient and fast, and the construction efficiency is effectively improved.
Drawings
Fig. 1 is a structural view of the installation push-out of the present invention.
Fig. 2 is a drawing structure for installation of the present invention.
Fig. 3 is a top view of the mounting structure of the present invention.
Fig. 4 is a top view of the top pulling apparatus of the present invention.
1-a first steel truss girder rod piece, 2-a second steel truss girder rod piece, 3-a connecting plate, 4-a supporting seat, 5-a jack, 6-a first jacking seat and 7-a second jacking seat.
Detailed Description
The supporting seat 4 comprises a bottom plate and a vertical plate arranged on the bottom plate; a reinforcing rib plate is arranged between the bottom plate and the vertical plate; the top pulling seat comprises a bottom plate and a vertical plate arranged on the bottom plate; and a reinforcing rib plate is arranged between the bottom plate and the vertical plate, and the bottom plate is arranged on the connecting plate 3.
The support seat 4 and the connecting plate 1 are connected with the closure steel truss in a high-strength bolt connection mode.
The support seat 4 and the connecting plate 1 are connected with the closure steel truss in a welding way.
The jack 5 is a 200t jack.
When pushing and pulling operation is carried out, the mounting position of the supporting seat needs to be changed, so that the supporting surface faces to the top pulling seat to be pushed.
Referring to fig. 1 to 4, the present invention provides a steel truss closure adjusting device, which includes: a supporting seat, a top-pulling seat and a jack. As can be seen from the combination of the figures 3 and 4, the two top-pull seats are arranged on the connecting plate and are respectively positioned at the two ends of the connecting plate, the supporting seat is positioned in the long hole of the connecting plate, and the connecting seat cannot interfere with the supporting seat when moving.
The supporting seat is connected with the first steel truss girder rod piece 1 through a bottom plate below the supporting seat by high-strength bolts, the top-pull seat surrounds the supporting seat at two ends (through long holes), and the top-pull seat is connected with the second steel truss girder rod piece 2 through high-strength bolts (through connecting plates). The jack is arranged between the side of the first steel truss girder rod piece 1 and the supporting seat or between the side of the second steel truss girder rod piece 2 and the supporting seat, and jacking is carried out to finish pushing or pulling operation.
As shown in fig. 1 (front view direction), a pair of top-pulling devices according to the present invention is used, one above the steel truss member and one below the steel truss member; taking the upper connecting device as an example, the jack is installed on the left side of the supporting seat, the movable rod faces the first jacking seat, the connecting plate below the first jacking seat is connected with the upper surface of the second steel truss girder rod piece, and the part of the connecting plate below the second jacking seat is positioned on the upper surface of the first steel truss girder rod piece but is not connected with the first steel truss girder rod piece; the movable rod of the jack pushes the first jacking seat to separate the two steel truss girder rod pieces. The distance between the vertical plate of the supporting seat and the vertical plate of the first top-pulling seat is 700mm, and the distance between the vertical plate of the supporting seat and the vertical plate of the second top-pulling seat is 760 mm. The length of the vertical plate of the top pulling seat is 660 mm.
As shown in fig. 2, the mounting direction of the supporting seat is opposite to that of fig. 1, the jack faces to the second jacking seat, and the piston rod moves the two steel truss girder rod pieces to be close to each other. The distance between the vertical plate of the supporting seat and the vertical plate of the first top-pulling seat is 760mm, and the distance between the vertical plate of the supporting seat and the vertical plate of the second top-pulling seat is 700 mm.
In specific construction, the number of the top pulling devices is determined according to actual situations, the top pulling devices are generally used in pairs and are uniformly distributed around the steel truss girder rod piece, so that the stress is uniform.
The black dots in fig. 3 are the distribution of the high-strength bolts, and the length of the connecting plate is 2780mm and the width is 920 mm. The left black point is a bolt hole below the first top-pulling seat, and the middle black point is a screw hole below the supporting seat.
The NSGZQ-5 standard of Guangzhou south Shagang railway is newly built, and the flood-crossing strange draining way steel truss girder flexible arch grand bridge engineering is high in construction precision requirement in the closure process of the main bridge steel truss girder. And because the bridge body is huge, the influence of expansion with heat and contraction with cold is large. According to the research and the determination, the adjustment and the control of the closing position of the steel truss girder are adopted, and the jack is arranged between the side of the first steel truss girder rod piece 1 and the supporting seat or between the side of the second steel truss girder rod piece 2 and the supporting seat to jack up and finish the pushing or pulling operation.
By adopting the invention, the supporting seat and the top pulling seat are connected with the closure steel truss girder; the supporting seat and the top pulling seat are connected with the closure steel truss in a high-strength bolt connection mode; the jacking and pulling device for adjusting the closure opening of the steel truss girder adopts a mode of adjusting the position of a jack to perform jacking or pulling-up action on the steel truss girder, so that the longitudinal coordinate of the cantilever closure of the steel truss girder is ensured, and the difficulty in resisting closure of the steel girder is reduced.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the specification, which are fully applicable to a variety of fields of endeavour to which this invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. A top pulling device for adjusting a closure opening of a steel truss girder is characterized by comprising a connecting plate (3) and a pair of top pulling seats fixed at two ends of the connecting plate (3), wherein a long hole is formed in the part, located between the two top pulling seats, of the connecting plate (3); the device also comprises a supporting seat (4) positioned in the long hole, wherein a jack (5) is horizontally arranged on the supporting seat (4), and the movable end of the jack (5) props against one of the jacking seats; one end of the connecting plate (3) is arranged on the surface of one of the steel truss girder rod pieces to be closed, and the supporting seat (4) is arranged on the surface of the other steel truss girder rod piece to be closed.
2. The top pulling device for adjusting the closure of the steel truss girder according to claim 1, wherein the supporting seat (4) comprises a bottom plate and a vertical plate arranged on the bottom plate; a reinforcing rib plate is arranged between the bottom plate and the vertical plate; the top pulling seat comprises a bottom plate and a vertical plate arranged on the bottom plate; a reinforcing rib plate is arranged between the bottom plate and the vertical plate, and the bottom plate is arranged on the connecting plate (3).
3. The top pulling device for adjusting the closure of the steel truss girder according to claim 1, wherein the support base (4) and the connecting plate (3) are connected with the steel truss girder at the closure by high-strength bolts.
4. The top pulling device for adjusting the closure of the steel truss girder according to claim 1, wherein the supporting seat (4) and the connecting plate (3) are connected with the closure steel truss girder in a welding manner.
5. A steel truss closure adjusting jacking device as claimed in any one of claims 1 to 4, wherein the jack (5) is a 200t jack.
6. A top pulling method for adjusting a closure opening of a steel truss girder is realized by adopting the device of any one of claims 1 to 5, and is characterized in that at least one pair of top pulling devices are symmetrically arranged on the surface of the steel truss girder to be closed; one end of the connecting plate (3) is arranged on the surface of the second steel truss girder rod piece (2), and the other end of the connecting plate extends to the surface of the first steel truss girder rod piece (1) but is not connected with the first steel truss girder rod piece; the supporting seat (4) passes through a long hole on the connecting plate (3) and is installed on the first steel truss girder rod piece (1); during pushing operation, the jack (5) faces the top-pull seat at one end of the connecting plate (3) and pushes the top-pull seat to realize pushing; when the connecting plate is pulled back, the jack (5) faces the top pulling seat at the other end of the connecting plate (3) and pushes the top pulling seat to realize pulling back.
7. The jacking method for adjusting the closure of the steel truss girder according to claim 6, wherein during jacking and pulling back, the mounting direction of the supporting seat (4) needs to be changed to make the supporting surface face the jacking seat to be pushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922655.XA CN112030764A (en) | 2020-09-04 | 2020-09-04 | Top-pulling device and method for adjusting closure opening of steel truss girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922655.XA CN112030764A (en) | 2020-09-04 | 2020-09-04 | Top-pulling device and method for adjusting closure opening of steel truss girder |
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| Publication Number | Publication Date |
|---|---|
| CN112030764A true CN112030764A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010922655.XA Pending CN112030764A (en) | 2020-09-04 | 2020-09-04 | Top-pulling device and method for adjusting closure opening of steel truss girder |
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| CN (1) | CN112030764A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295225A (en) * | 2000-04-18 | 2001-10-26 | Maeda Corp | Auxiliary jig for assembling/installing precast panel |
| JP2005155060A (en) * | 2003-11-21 | 2005-06-16 | Kayaba Ind Co Ltd | Interval adjusting device between opposed members |
| CN101139820A (en) * | 2007-08-13 | 2008-03-12 | 中铁大桥勘测设计院有限公司 | Steel truss bridge closing jacking-drawing device |
| CN201077957Y (en) * | 2007-08-13 | 2008-06-25 | 中铁大桥勘测设计院有限公司 | Steel truss bridge closure top-pulling device |
| CN201486156U (en) * | 2009-05-15 | 2010-05-26 | 中国十七冶建设有限公司 | Accurate adjustment device for adjusting gap between large-sized steel members |
| CN104929054A (en) * | 2015-06-03 | 2015-09-23 | 中交第二航务工程局有限公司 | Method for rapid closure and position adjustment of steel trussed cable-stayed bridge |
| CN106437181A (en) * | 2016-09-09 | 2017-02-22 | 国网江苏省电力公司经济技术研究院 | Splicing seam adjusting device for steel structure assembling |
| CN206143636U (en) * | 2016-10-14 | 2017-05-03 | 中交一公局第五工程有限公司 | Closure of steel longeron is turned over and is pushed up fine tuning device |
| CN109778708A (en) * | 2019-03-05 | 2019-05-21 | 中铁四局集团有限公司 | Mid-span closure longitudinal deviation rectifying device of large-span continuous steel truss cable-stayed bridge |
-
2020
- 2020-09-04 CN CN202010922655.XA patent/CN112030764A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295225A (en) * | 2000-04-18 | 2001-10-26 | Maeda Corp | Auxiliary jig for assembling/installing precast panel |
| JP2005155060A (en) * | 2003-11-21 | 2005-06-16 | Kayaba Ind Co Ltd | Interval adjusting device between opposed members |
| CN101139820A (en) * | 2007-08-13 | 2008-03-12 | 中铁大桥勘测设计院有限公司 | Steel truss bridge closing jacking-drawing device |
| CN201077957Y (en) * | 2007-08-13 | 2008-06-25 | 中铁大桥勘测设计院有限公司 | Steel truss bridge closure top-pulling device |
| CN201486156U (en) * | 2009-05-15 | 2010-05-26 | 中国十七冶建设有限公司 | Accurate adjustment device for adjusting gap between large-sized steel members |
| CN104929054A (en) * | 2015-06-03 | 2015-09-23 | 中交第二航务工程局有限公司 | Method for rapid closure and position adjustment of steel trussed cable-stayed bridge |
| CN106437181A (en) * | 2016-09-09 | 2017-02-22 | 国网江苏省电力公司经济技术研究院 | Splicing seam adjusting device for steel structure assembling |
| CN206143636U (en) * | 2016-10-14 | 2017-05-03 | 中交一公局第五工程有限公司 | Closure of steel longeron is turned over and is pushed up fine tuning device |
| CN109778708A (en) * | 2019-03-05 | 2019-05-21 | 中铁四局集团有限公司 | Mid-span closure longitudinal deviation rectifying device of large-span continuous steel truss cable-stayed bridge |
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Application publication date: 20201204 |
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| RJ01 | Rejection of invention patent application after publication |