CN110924311A - Large-span steel box girder side span folding device and folding method - Google Patents
Large-span steel box girder side span folding device and folding method Download PDFInfo
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- CN110924311A CN110924311A CN201911302689.2A CN201911302689A CN110924311A CN 110924311 A CN110924311 A CN 110924311A CN 201911302689 A CN201911302689 A CN 201911302689A CN 110924311 A CN110924311 A CN 110924311A
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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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Abstract
The invention belongs to the technical field of highway construction, and relates to a large-span steel box girder side span folding device and a folding method, which comprise the following steps: the adjusting device comprises an upper adjusting piece arranged at the bottom of the steel box girder and an adjusting base which is arranged on the bottom girder and is matched with the upper adjusting piece; the adjusting base can move up and down along the bottom beam, and the height of the adjusting base is greater than or equal to that of the upper adjusting piece; the bottom of the steel box girder is sequentially provided with a connecting piece, a telescopic piece and a rolling piece from top to bottom; the folding device reduces the impact force of the steel box girder on the bottom girder and reduces the damage under the buffer action of the telescopic piece when the steel box girder falls down; and the steel box girder is moved by the rolling piece to be accurately positioned, and is driven to move downwards by the adjusting base to fall onto the bottom beam and be aligned and folded with the side span of the adjacent steel box girder. The invention reduces the impact force when the steel box girder falls, prevents the steel box girder and the bottom girder from being locally damaged, is convenient to move and accurately positions the steel box girder, and saves time and labor.
Description
Technical Field
The invention belongs to the technical field of highway construction, and relates to a side span folding device and a folding method, in particular to a side span folding device and a folding method for a long-span steel box girder.
Background
When a modern highway bridge is constructed, a steel plate box girder is a structural form commonly adopted in engineering, in a large-span cable supported bridge, the span of a steel box girder reaches hundreds of meters to thousands of meters, and a plurality of sections of steel box girders are arranged on the girder to form the bridge during construction; the steel box girder is generally formed by connecting a top plate, a bottom plate, a web plate, a transverse partition plate, a longitudinal partition plate, a stiffening rib and the like in a full welding mode, when the steel box girder is installed, the steel box girder is lifted from one end of a bridge by a crane and placed at a corresponding position on a main girder, but when the steel box girder is lifted and placed down, particularly when the steel box girder is placed down, a hard-to-hard rigid contact exists on a contact surface of the steel box girder and the main girder, the steel box girder and the main girder can be locally damaged, the steel box girder is integrally deformed, the next step of work is not facilitated, the steel box girder is deformed, the stress is not uniform, and the safety risk exists; meanwhile, when the lower back of the steel box girder is folded with the side span of the adjacent steel box girder, the steel box girder needs to be moved to position the steel box girder, and the steel box girder is heavy and is not easy to move, so that the positioning is not easy to control when the steel box girder is moved by a crane; the manual moving construction amount is large, and time and labor are wasted.
Disclosure of Invention
In order to solve the problems that stress is uneven due to damage generated during steel box girder installation and the steel box girder is not easy to move during folding, the invention provides a large-span steel box girder side span folding device and a folding method, which can reduce impact force when the steel box girder falls down, prevent the steel box girder and a bottom girder from local damage, conveniently move the steel box girder and accurately position the steel box girder when the side span is folded, and save time and labor.
In order to achieve the purpose, the invention adopts the technical scheme that:
a large-span steel box girder side span closure device includes: the adjusting device comprises an upper adjusting piece arranged at the bottom of the steel box girder and an adjusting base which is arranged on the bottom girder and is matched with the upper adjusting piece; the height of the adjusting base is greater than or equal to that of the upper adjusting piece;
the upper adjusting piece comprises a connecting piece, a telescopic piece and a rolling piece which are sequentially arranged from top to bottom; the adjusting base is arranged on the bottom beam and can move up and down along the bottom beam under the pushing action of the upper adjusting piece.
Further, the connecting piece comprises a fixing block and a fixing plate; the fixed block is fixed with the steel box girder base, and the fixed plates are fixed on two sides of the fixed block through screws; the fixed block is connected with the telescopic piece and the rolling piece in sequence.
Furthermore, the telescopic part comprises an outer protective cylinder, a spring and an inner shaft, wherein the spring and the inner shaft are arranged in the outer protective cylinder from top to bottom, the outer protective cylinder is connected with the fixed block, one end of the spring is in contact with the fixed block, the other end of the spring is in contact with the inner shaft, and the inner shaft is provided with a rolling part.
Further defined, the rolling member is a ball or a roller.
Furthermore, the adjusting base comprises an adjusting plate, an adjusting limiting block and an adjusting screw rod; the bottom beam is provided with an opening; the adjusting limiting blocks are respectively arranged on the two side walls in the opening, and the adjusting plate is arranged above the adjusting limiting blocks; the adjusting screw rod respectively penetrates through the adjusting limiting block to be in contact with the lower surface of the adjusting plate.
Further, the sum of the heights of the adjusting plate and the adjusting limit plate is larger than or equal to the sum of the heights of the connecting piece, the telescopic piece and the rolling piece.
A folding method of a large-span steel box girder side span folding device is characterized by comprising the following steps: the folding method comprises the following steps:
1) adjusting the adjusting base to enable the top end of the adjusting base to be flush with the surface of the bottom beam; the steel box girder is lifted up and is placed at a corresponding position above the bottom girder, the steel box girder falls down, and the impact force of the steel box girder on the bottom girder is reduced under the double actions of the buffering action of the telescopic piece and the point contact of the rolling piece and the upper surface of the adjusting device;
2) the steel box girder is moved through the rolling piece, and is accurately positioned to be aligned with the position of the adjacent steel box girder;
3) the adjusting base is adjusted to move downwards, so that the adjusting base drives the steel box girder to continuously move downwards, the height of the adjusting base is larger than or equal to that of the upper adjusting piece, and when the upper adjusting piece falls into the adjusting base, the steel box girder can just fall onto the bottom girder and is aligned and folded with the side span of the adjacent steel box girder.
Further, the step 1) specifically comprises: in the opening, an adjusting screw rod on the adjusting limiting block is screwed, so that the adjusting screw rod pushes an adjusting plate upwards, and the adjusting plate in the opening is aligned with the upper surface of the bottom beam; the steel box girder is lifted, when the steel box girder is placed at the corresponding position above the bottom girder, the steel box girder is placed, the spring at the bottom of the steel box girder is pressed, the impact force generated when the steel box girder is placed is reduced through buffering, the rolling piece is slowly contacted with the upper surface of the adjusting plate, the impact of the steel box girder on the bottom girder is reduced, and the local damage is avoided.
Further, the step 3) is specifically: and adjusting the adjusting screw rod to enable the adjusting plate to move downwards so as to drive the whole steel box girder to move downwards, enable the bottom of the steel box girder to fall onto the bottom girder, align and fold the side span of the adjacent steel box girder, and reduce local damage caused by rigid collision in the process of lowering the steel box girder.
Further, when falling down the steel box girder through adjusting the lead screw, because the height between the adjusting plate and the adjusting limiting plate is more than or equal to the sum of the heights between the connecting piece, the telescopic piece and the rolling piece, the connecting piece, the telescopic piece and the rolling piece that set up at the bottom of the steel box girder fall in the opening, and the steel box girder can just fall on the floorbar, the bottom surface of the steel box girder contacts with the upper surface of the floorbar, and the steel box girder is aligned with the side span of the adjacent steel box girder and folded.
The invention has the beneficial effects that:
1. according to the invention, the upper adjusting part and the adjusting base which is arranged at the bottom of the steel box girder and is matched with the upper adjusting part are arranged, the adjusting base can move up and down along the bottom girder under the pushing action of the upper adjusting part, the upper adjusting part comprises the connecting part, the telescopic part and the rolling part which are sequentially arranged from top to bottom, the impact force of the falling of the steel box girder is buffered through the telescopic part, the steel box girder is prevented from generating rigid collision with the bottom girder, the local damage is caused, the stress is not uniform, meanwhile, the steel box girder is moved through the rolling part, the steel box girder can be accurately positioned, and finally, the steel box girder falls onto the bottom girder through the adjusting base to carry out side span folding, the operation process is simple and reasonable, and the time is saved.
2. According to the invention, the telescopic piece is arranged on the steel box girder base, so that the impact force generated when the steel box girder falls down can be well buffered, the steel box girder is slowly contacted with the bottom girder, and the safety risk caused by uneven stress due to the fact that the steel box girder and the bottom girder are subjected to rigid collision and local damage is avoided.
3. According to the invention, the rolling piece is arranged on the base of the steel box girder, the rolling piece is a ball or a roller, the rolling piece is contacted with the upper surface of the adjusting plate after the steel box girder is placed down, and the steel box girder is driven by the rolling piece to roll on the upper surface of the adjusting plate in the horizontal direction to accurately position the adjusting plate, so that the adjusting plate is aligned with the adjacent steel box girder, the side span folding is convenient, and the alignment position is easy to control by adopting the rolling piece, so that the time and the labor are saved.
4. According to the invention, the upper adjusting piece is matched with the adjusting base, the sum of the heights of the adjusting plate and the adjusting limiting plate is greater than or equal to the sum of the heights of the connecting piece, the telescopic piece and the rolling piece, the adjusting screw rod is adjusted to control the adjusting plate to move up and down, so that when the upper adjusting piece falls into the opening of the bottom beam, the aligned steel box beam moves downwards and just falls onto the bottom beam, the position determined in the horizontal direction cannot be changed after falling, and the steel box beam is convenient to fold along the side span.
Drawings
FIG. 1 is a schematic structural view of a folding device according to the present invention;
FIG. 2 is a schematic diagram of the state of the closure device in construction according to the present invention;
FIG. 3 is a schematic diagram of the closure device according to the present invention in a post-construction state;
wherein:
1-steel box girder; 2, fixing blocks; 3, fixing a plate; 4-screws; 5, an outer protective cylinder; 6, an inner shaft; 7-a spring; 8-a ball; 9, adjusting plates; 10-adjusting a limiting block, 11-adjusting a lead screw; 12-bottom beam.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Example 1
The invention provides a large-span steel box girder side span folding device, which comprises: the steel box girder comprises a steel box girder 1 and a bottom girder 12, wherein an upper adjusting part is arranged at the bottom of the steel box girder 1, and an adjusting base matched with the upper adjusting part is arranged on the bottom girder 12; the height of the adjusting base is greater than or equal to that of the upper adjusting piece; the adjustment base can move up and down along the bottom beam 12 under the pushing action of the upper adjustment member.
Referring to fig. 1, in this embodiment, the steel box girder 1 is rectangular in structure, the upper adjusting member includes a connecting member, an expansion member, and a rolling member sequentially arranged from top to bottom, the bottom girder 12 is provided with an opening, and an adjusting base capable of moving up and down is arranged in the opening.
The connecting piece includes fixed block 2 and fixed plate 3, be provided with fixed block 2 on the 1 bottom surface of steel box girder, the fixed block is the rectangle, the mutually perpendicular of long limit and steel box girder bottom surface, fixed plate 3 is arranged in on the side on two long limits of fixed block 2 and is fixed locking through screw 4 and fixed block 2, it can make fixed block 2 add to hold between the fixed plate 3 of relative setting and dismantle the convenience to fasten the cooperation through the screw, fixed block 2 links to each other with extensible member and rolling member in proper order.
Referring to fig. 1, in this embodiment, the telescopic member includes an outer protective sleeve 5, and a spring 7 and an inner shaft 6 which are disposed in the outer protective sleeve 5 from top to bottom, specifically, the outer protective sleeve 5 is a hollow cylinder, the outer protective sleeve 5 is fixed on the bottom surface of the fixed block 2, the spring 7 and the inner shaft 6 are disposed in the outer protective sleeve 5, one end of the spring 7 contacts with the bottom surface of the fixed block 2, the other end of the spring 7 contacts with the upper surface of the inner shaft 6, the inner shaft 6 is T-shaped, a step is disposed at the bottom of the outer protective sleeve 5, when the inner shaft 6 is stretched under the action of the spring 7, the inner shaft 6 is prevented from falling off, a rolling member is disposed at the bottom.
Referring to fig. 1, in the embodiment, the adjusting base includes an adjusting plate 9, an adjusting limiting block 10 and an adjusting screw rod 11; the adjusting limiting blocks 10 are two, the adjusting limiting blocks 10 are respectively arranged on two symmetrical side walls in the opening, the adjusting plate 9 is arranged above the adjusting limiting blocks, the left length and the right length of the adjusting plate 9 are equal to the left length and the right length of the opening, the adjusting screw 11 respectively penetrates through the adjusting limiting blocks 10 from the bottom end face of the adjusting limiting plate 10 and contacts with the lower surface of the adjusting plate 9, and during implementation, the sum of the heights of the adjusting plate 9 and the adjusting limiting plate 10 is larger than or equal to the sum of the heights of the fixing block 2, the telescopic piece and the.
Example 2
The invention provides a folding method of a large-span steel box girder side span folding device, which comprises the following steps:
1) adjusting the adjusting base to make the top end of the adjusting base flush with the surface of the bottom beam 12; the steel box girder 1 is lifted up, when the steel box girder 1 is placed at a corresponding position above the bottom girder 12, the steel box girder 1 falls down, under the buffer action of the telescopic piece, the impact force of the steel box girder 1 in the falling process is reduced, the rolling piece is slowly contacted with the upper surface of the adjusting base and is in point contact with the upper surface of the adjusting base, the impact force of the steel box girder 1 on the bottom girder is reduced under the double actions, and the damage is reduced;
2) the steel box girder 1 is moved through the rolling piece, and is accurately positioned to be aligned with the position of the adjacent steel box girder;
3) the adjusting base is adjusted to move downwards, so that the adjusting base drives the steel box girder 1 to continuously move downwards, the height of the adjusting base is larger than or equal to that of the upper adjusting piece, and when the upper adjusting piece falls into the adjusting base, the steel box girder 1 can just fall onto the bottom girder 12 and is aligned with the side span of the adjacent steel box girder to be folded.
Referring to fig. 2, in this embodiment, the specific operation process of step 1) is: in the opening, an adjusting screw rod on the adjusting limiting block is screwed, so that the adjusting screw rod pushes the adjusting plate 9 upwards, and the upper surface of the adjusting plate 9 in the opening is flush with the upper surface of the bottom beam 12; the steel box girder 1 is lifted, when the steel box girder 1 is placed at a corresponding position above the bottom girder 12, the steel box girder 1 is placed downwards, the spring 7 arranged at the bottom of the steel box girder 1 plays a role in buffering, the impact force generated when the steel box girder 1 is placed downwards is reduced, the rolling piece is slowly contacted with the upper surface of the adjusting plate 9 and is in point contact with the upper surface of the adjusting plate 9, and the local damage of the steel box girder 1 to the bottom girder 12 can be reduced under the dual functions.
Referring to fig. 3, in this embodiment, the specific operation process of step 3) is: and screwing the adjusting screw rod to enable the adjusting plate to move downwards so as to drive the steel box girder 1 to move downwards integrally, finally, the bottom of the steel box girder 1 falls onto the bottom beam 12, and the side span of the steel box girder adjacent to the bottom beam is aligned and folded, so that the local damage caused by rigid collision in the process of lowering the steel box girder 1 is reduced.
Meanwhile, after the steel box girder 1 falls down, the adjusting plate 9 is taken down in the opening, the screws are loosened, and the connecting piece, the telescopic piece and the rolling piece arranged at the bottom of the steel box girder are detached for recycling.
In this embodiment, because the height sum between adjusting plate 9 and the regulation limiting plate 10 is more than or equal to the height sum of fixed block 2, extensible member and ball 8 three, when falling steel box girder 1 through adjusting lead screw 11 like this, when connecting piece, extensible member and ball 8 that steel box girder 1 bottom set up can fall in the opening, steel box girder 1 just falls on floorbar 12, the bottom surface of steel box girder 1 contacts with the upper surface of floorbar 12, steel box girder 1 aligns with the side span of adjacent steel box girder and folds.
According to the invention, the spring 7 with a buffering effect is additionally arranged on the steel box girder 1, so that when the steel box girder 1 is put down, the contact between the steel box girder 1 and the bottom girder 12 is elastic contact, and the ball 8 and the bottom girder 12 are in point contact, and the double buffering effect is achieved, thereby effectively avoiding the phenomenon that stress is not concentrated due to damage and deformation of the steel box girder 1 and the bottom girder 12 caused by rigid collision; the ball 8 can drive the steel box girder 1 to move in any direction on the bottom beam 12, so that the accurate positioning of the steel box girder 1 is realized, time and energy are saved, and finally the steel box girder 1 falls downwards to a corresponding position and is folded with the side span of the adjacent steel box girder by adjusting the screw rod 11.
Claims (10)
1. The utility model provides a device is foldd to large-span steel box girder side span which characterized in that: the large-span steel box girder side span folding device comprises: the adjusting device comprises an upper adjusting piece arranged at the bottom of the steel box girder (1) and an adjusting base which is arranged on the bottom beam (12) and is matched with the upper adjusting piece; the height of the adjusting base is greater than or equal to that of the upper adjusting piece;
the upper adjusting piece comprises a connecting piece, a telescopic piece and a rolling piece which are sequentially arranged from top to bottom; the adjusting base is arranged on the bottom beam (12) and can move up and down along the bottom beam (12) under the pushing action of the upper adjusting piece.
2. The large-span steel box girder side span folding device according to claim 1, characterized in that: the connecting piece comprises a fixed block (2) and a fixed plate (3); the fixed block (2) is fixed with the bottom of the steel box girder (1), and the fixed plate (3) is fixed on two sides of the fixed block (2) through screws (4); the fixed block (2) is sequentially connected with the telescopic piece and the rolling piece.
3. The large-span steel box girder edge-span folding device according to claim 1 or 2, characterized in that: the telescopic part comprises an outer protective cylinder (5), a spring (7) and an inner shaft (6), wherein the spring (7) and the inner shaft (6) are arranged in the outer protective cylinder (5) from top to bottom, the outer protective cylinder (5) is connected with the fixed block (2), one end of the spring (7) is in contact with the fixed block (2), the other end of the spring (7) is in contact with the inner shaft (6), and a rolling part is arranged at the bottom of the inner shaft (6).
4. The large-span steel box girder edge-span folding device of claim 3, characterized in that: the rolling parts are balls (8) or rollers.
5. The large-span steel box girder side span folding device according to claim 1, characterized in that: the adjusting base comprises an adjusting plate (9), an adjusting limiting block (10) and an adjusting screw rod (11); the bottom beam (12) is provided with an opening; the size of the opening is matched with that of the adjusting plate (9); the adjusting limiting blocks (10) are respectively arranged on two side walls in the opening, and the adjusting plate (9) is arranged above the adjusting limiting blocks (10); the adjusting screw rods (11) respectively penetrate through the adjusting limiting blocks (10) to be in contact with the lower surfaces of the adjusting plates (9).
6. The large-span steel box girder edge-span folding device of claim 5, characterized in that: the sum of the heights of the adjusting plate (9) and the adjusting limit plate (10) is greater than or equal to the sum of the heights of the connecting piece, the telescopic piece and the rolling piece.
7. The folding method of the long-span steel box girder side span folding device according to claim 1, characterized in that: the folding method comprises the following steps:
1) adjusting the adjusting base to enable the top end of the adjusting base to be flush with the surface of the bottom beam (12); the steel box girder (1) is lifted, when the steel box girder is placed at a corresponding position above the bottom girder (12), the steel box girder (1) falls down, and the impact force of the steel box girder (1) on the bottom girder (12) is reduced under the double actions of the buffering action of the telescopic piece and the point contact of the rolling piece and the upper surface of the adjusting device;
2) the steel box girder (1) is moved through the rolling piece, and is accurately positioned to be aligned with the adjacent steel box girder (1);
3) adjusting the adjusting base to move downwards along the bottom beam (12), wherein the height of the adjusting base is greater than or equal to that of the upper adjusting piece; therefore, the base is adjusted to drive the steel box girder (1) to continuously move downwards, and finally the steel box girder (1) falls onto the bottom beam (12) and is aligned and folded with the side span of the adjacent steel box girder (1).
8. The long-span steel box girder side span folding method according to claim 6, characterized in that: the step 1) is specifically as follows: in the opening, an adjusting screw rod (11) on an adjusting limiting block (10) is screwed, so that the adjusting screw rod (11) pushes an adjusting plate (9) upwards, and the adjusting plate (9) in the opening is aligned with the upper surface of a bottom beam (12); the steel box girder (1) is lifted, when the steel box girder (1) is placed at a corresponding position above the bottom girder (12), the steel box girder (1) is placed, a spring (7) at the bottom of the steel box girder (1) is pressed, impact force generated when the steel box girder (1) is placed is reduced through buffering, the rolling piece slowly contacts with the upper surface of the adjusting plate, impact of the steel box girder (1) on the bottom girder (12) is reduced, and local damage is avoided.
9. The long-span steel box girder side span folding method according to claim 6, characterized in that: the step 3) is specifically as follows: adjusting the adjusting screw rod (11) to enable the adjusting plate (9) to move downwards, so that the steel box girder (1) is driven to move downwards integrally, the bottom of the steel box girder (1) falls onto the bottom beam (12), the side spans of the adjacent steel box girders (1) are aligned and folded, and local damage caused by rigid collision in the process of lowering the steel box girder (1) is reduced.
10. The long-span steel box girder side span folding method according to claim 8, characterized in that: when falling steel box girder (1) through adjusting lead screw (11), because the height between regulating plate (9) and regulation limiting plate (10) is more than or equal to the sum of the height between connecting piece, extensible member and the rolling member, the connecting piece that steel box girder (1) bottom set up, extensible member and rolling member fall in the opening, and steel box girder (1) can fall on floorbar (12) just, the bottom surface of steel box girder (1) contacts with the upper surface of floorbar (12), align steel box girder (1) and the side span of adjacent steel box girder and fold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911302689.2A CN110924311A (en) | 2019-12-17 | 2019-12-17 | Large-span steel box girder side span folding device and folding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911302689.2A CN110924311A (en) | 2019-12-17 | 2019-12-17 | Large-span steel box girder side span folding device and folding method |
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| CN110924311A true CN110924311A (en) | 2020-03-27 |
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| CN201911302689.2A Pending CN110924311A (en) | 2019-12-17 | 2019-12-17 | Large-span steel box girder side span folding device and folding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026522A (en) * | 2021-03-22 | 2021-06-25 | 北京市政建设集团有限责任公司 | Bridge steel box girder installation structure and construction process |
-
2019
- 2019-12-17 CN CN201911302689.2A patent/CN110924311A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026522A (en) * | 2021-03-22 | 2021-06-25 | 北京市政建设集团有限责任公司 | Bridge steel box girder installation structure and construction process |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210917 Address after: Room 1-9, 22 / F, building B, science and technology complex building, 145 Hong Kong Road, Jiang'an District, Wuhan City, Hubei Province, 430015 Applicant after: CCCC-SHB FIRST ENGINEERING Co.,Ltd. Applicant after: CCCC SECOND HIGHWAY ENGINEERING Co.,Ltd. Applicant after: CCCC HIGHWAY BRIDGES NATIONAL ENGINEERING RESEARCH CENTER Co.,Ltd. Address before: Room 1-9, 22 / F, building B, science and technology complex building, 145 Hong Kong Road, Jiang'an District, Wuhan City, Hubei Province, 430015 Applicant before: CCCC-SHB FIRST ENGINEERING Co.,Ltd. |
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Application publication date: 20200327 |
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