CN111254840B - Integral girder falling structure and girder falling method for steel box girder bridge - Google Patents
Integral girder falling structure and girder falling method for steel box girder bridge Download PDFInfo
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- CN111254840B CN111254840B CN202010197161.XA CN202010197161A CN111254840B CN 111254840 B CN111254840 B CN 111254840B CN 202010197161 A CN202010197161 A CN 202010197161A CN 111254840 B CN111254840 B CN 111254840B
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- box girder
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 143
- 239000010959 steel Substances 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 claims 4
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of steel structure bridge construction, in particular to an integral girder falling structure and girder falling method of a steel box girder bridge, wherein a fixed support system and a movable support system are arranged between the steel box girder bridge and a steel frame platform structure, the fixed support system comprises a backing beam and a first cushion block structure arranged on the backing beam, the movable support system comprises a pushing equipment jack, a second cushion block structure, an auxiliary jack and a third cushion block structure, and the auxiliary jack and the third cushion block structure are only used for supporting the pushing equipment jack; the steel box girder bridge can be integrally jacked by the jack of the jacking equipment, the height of a first cushion block structure under the steel box girder is reduced layer by layer, and meanwhile, a girder dropping cycle is realized by a method of reducing the jack of the jacking equipment layer by the auxiliary jack; the steel box girder can be lowered to the design requirement elevation through the cyclic operation of a plurality of girder falling, and the girder falling construction method has the characteristics of high construction efficiency, safety, reliability and good economical efficiency.
Description
Technical Field
The invention relates to the technical field of steel structure bridge construction, in particular to an integral girder falling structure of a steel box girder bridge and a girder falling method.
Background
When the pushing method is adopted to construct the steel box girder, firstly, the steel box girder bridge is segmented or wholly pre-assembled at the pre-assembling position of the bridge head (or the bridge tail), then the pre-assembled steel box girder bridge is vertically lifted upwards by a certain distance by pushing equipment, then horizontally pushed for a certain distance towards the installation position of the bridge, then the jack of the pushing equipment descends to return to the initial position in a no-load manner, and then the bridge is circularly moved according to the method to be gradually pushed to advance; because the bridge bottom plate is not necessarily horizontal in the length direction, but has a certain radian, the bridge bottom plate needs to be pushed at a position higher than the actual installation height, so that the bridge bottom plate can not collide with pushing equipment in the pushing process; the bridge bottom plate is pushed to the upper part of the installation position, so that the bridge needs to be subjected to girder falling construction; the traditional girder falling mode is to increase a plurality of steel column supports below a steel box girder bridge and pushing equipment, and gradually reduce the heights of the pushing equipment and the steel box girder bridge by a method of cutting the supporting heights of the steel columns in batches, wherein the method has the following defects: 1) The supporting heights of the steel columns are cut in batches, the consistency of the heights of the steel columns is not easy to grasp, and when the whole steel box girder bridge falls down, the contact part of the steel box girder bottom plate and the jack of the pushing equipment is easy to be emptied, so that the steel box girder bottom plate is locally deformed; 2) The supporting speed of the high-altitude or water cutting steel column is low, the labor intensity is high, and the safety is poor; 3) After the steel columns are cut, the upper section steel column and the lower section steel column are welded together again to be used as an integral steel support for working, so that the workload of beam falling is greatly increased, and the construction efficiency is reduced; these are not desirable to those skilled in the art.
Disclosure of Invention
Aiming at the problems, the invention discloses an integral girder falling structure of a steel box girder bridge, which comprises the following components: the steel frame platform structure, the movable support system and the fixed support system;
The steel box girder bridge is arranged above the steel frame platform structure, the movable supporting system and the fixed supporting system are arranged between the steel frame platform structure and the steel box girder bridge, and the fixed supporting systems are arranged on two sides of the movable supporting system;
The fixed support system comprises a bolster arranged on the steel frame platform structure and a first cushion block structure arranged on the bolster, the first cushion block structure comprises a plurality of first cushion blocks which are overlapped up and down in sequence, the movable support system comprises a pushing equipment jack, a second cushion block structure, an auxiliary jack and a third cushion block structure, the second cushion block structure comprises a plurality of second cushion blocks which are overlapped up and down, the third cushion block structure comprises a plurality of third cushion blocks which are overlapped up and down, the pushing equipment jack is arranged between the steel box girder bridge and the second cushion block structure, the second cushion block structure is arranged on the steel frame platform structure, the auxiliary jack is arranged between the pushing equipment jack and the third cushion block structure, and the third cushion block structure is arranged on the steel frame platform structure.
The steel box girder bridge integral girder falling structure comprises a steel pipe pile, a distribution girder and a track girder, wherein the distribution girder is arranged on the steel pipe pile, the track girder is paved on the distribution girder along the longitudinal direction of the steel box girder bridge, and the bolster, the second cushion block structure and the auxiliary jack are all arranged on the track girder.
The steel box girder bridge integral girder falling structure is characterized in that the distribution girders and the track girders are all box structures welded by double-spliced H-shaped steel.
The steel box girder bridge integral girder falling structure comprises a first cushion block, a second cushion block and a third cushion block, wherein the first cushion block, the second cushion block and the third cushion block are all box steel structures.
The steel box girder bridge integral girder falling structure is characterized in that the heights of the first cushion block, the second cushion block and the third cushion block are smaller than the maximum vertical lifting stroke of the jack of the pushing equipment and the maximum vertical lifting stroke of the auxiliary jack.
The whole girder construction that falls of foretell steel case girder bridge, wherein, the bottom of steel case girder bridge is provided with the lug, just hang on the lug and be equipped with the chain block, the hole has all been seted up at the edge of first cushion, second cushion and third cushion.
The integral girder falling structure of the steel box girder bridge is characterized in that the adjacent first cushion blocks, the adjacent second cushion blocks, the adjacent third cushion blocks and the first cushion block structure are all connected with the girder through bolt pairs.
The invention also discloses a steel box girder bridge integral girder falling method based on the steel box girder bridge integral girder falling structure, wherein the girder falling method comprises the following steps:
step S1, after the steel box girder bridge is lifted by using a jack of a pushing device so that the first cushion block structure and the steel box girder bridge are separated from each other, removing the first cushion block of the first cushion block structure, which is positioned at the uppermost part;
S2, lowering the jack of the pushing equipment so that the whole weight of the steel box girder bridge falls on the first cushion block structure, and taking off the steel box girder bridge and the jack of the pushing equipment;
Step S3, after the auxiliary jack is used for lifting the third cushion block structure so as to enable the jack of the pushing device to be separated from the second cushion block structure, removing the second cushion block positioned at the uppermost position in the second cushion block structure;
s4, the auxiliary jack is lowered, so that the pushing equipment jack is lowered onto the second cushion block structure, the third cushion block structure and the pushing equipment jack are separated from each other, and the third cushion block located at the uppermost position in the third cushion block structure is removed;
And S5, repeating the steps S1 to S4 until the height of the steel box girder bridge is reduced to the design requirement elevation, and stopping to finish the girder falling construction of the steel box girder bridge.
Said invention has the following advantages or beneficial effects:
The invention discloses an integral girder falling structure and girder falling method of a steel box girder bridge, wherein a fixed support system and a movable support system are arranged between the steel box girder bridge and a steel frame platform structure, the fixed support system comprises a backing girder and a first cushion block structure arranged on the backing girder, the movable support system comprises a pushing equipment jack, a second cushion block structure, an auxiliary jack and a third cushion block structure, and the auxiliary jack and the third cushion block structure are only used for supporting the pushing equipment jack; the steel box girder bridge can be integrally jacked by the jack of the jacking equipment, the height of a first cushion block structure under the steel box girder is reduced layer by layer, and meanwhile, a girder dropping cycle is realized by a method of reducing the jack of the jacking equipment layer by the auxiliary jack; the steel box girder can be lowered to the elevation required by design through a plurality of girder falling circulation operations, and the girder falling construction method has the characteristics of high construction efficiency, small workload, stable whole falling of the steel box girder bridge, safe and reliable construction, repeated use of materials and good economy, and can be widely applied to the construction operation of the whole girder falling of the steel box girder bridge.
Drawings
The invention and its features, aspects and advantages will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings. Like numbers refer to like parts throughout. The drawings may not be to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a front view of an overall girder dropping structure of a steel box girder bridge before girder dropping in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at AA in FIG. 1;
FIG. 3 is a front view of an integral girder dropping structure of a steel box girder bridge after girder dropping in an embodiment of the present invention
FIG. 4 is a flow chart of an integral girder dropping method of a steel box girder bridge in an embodiment of the present invention;
In the figure: the steel pipe pile is characterized in that the steel pipe pile is 1, the distribution beam is 2, the track beam is 3, the bolster is 4, the first cushion block structure is 5, the second cushion block structure is 6, the third cushion block structure is 7, the bolt pair is 8, the pushing equipment jack is 9, the auxiliary jack is 10, the lifting lug is 11, the chain block is 12, and the steel box girder bridge is 13.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention.
Embodiment one:
As shown in fig. 1 to 3, the present invention discloses an integral girder falling structure of a steel box girder bridge, and in particular, the integral girder falling structure of the steel box girder bridge includes: the steel frame platform structure, the movable support system and the fixed support system; the steel box girder bridge 13 is arranged on the steel frame platform structure, the movable supporting system and the fixed supporting system are arranged between the steel frame platform structure and the steel box girder bridge 13, and the fixed supporting systems are arranged on two sides of the movable supporting system; the fixed supporting system comprises a bolster 4 arranged on a steel frame platform structure and a first cushion block structure 5 arranged on the bolster 4, wherein the first cushion block structure 5 comprises a plurality of first cushion blocks which are overlapped up and down in sequence, the movable supporting system comprises a pushing equipment jack 9, a second cushion block structure 6, an auxiliary jack 10 and a third cushion block structure 7, the second cushion block structure 6 comprises a plurality of second cushion blocks which are overlapped up and down, the third cushion block structure 7 comprises a plurality of third cushion blocks which are overlapped up and down, the pushing equipment jack 9 is arranged between a steel box girder bridge 13 and the second cushion block structure 6, the second cushion block structure 6 is arranged on the steel frame platform structure, the auxiliary jack 10 is arranged between the pushing equipment jack 9 and the third cushion block structure 7, the third cushion block structure 7 is arranged on the steel frame platform structure, and the auxiliary jack 10 and the third cushion block structure 7 are only used for supporting the pushing equipment jack 9.
In a preferred embodiment of the present invention, the steel frame platform structure includes steel pipe piles 1, distribution beams 2 and track beams 3 to provide sufficient supporting force to support the weight of each structure; the distribution beam 2 is arranged on the steel pipe pile 1, and the distribution beam 2 is of a box structure welded by double-spliced H-shaped steel so as to distribute gravity transmitted from the upper part onto the steel pipe pile 1 in a balanced manner; the track beam 3 is paved on the distribution beam 2 along the longitudinal direction of the steel box girder bridge 13, the steel frame platform structure is provided with two track beams 3, the track beam 3 is a box structure welded by double-spliced H-shaped steel, and the cushion beam 4, the second cushion block structure 6 and the auxiliary jack 10 are all arranged on the track beam 3.
In a preferred embodiment of the present invention, the first cushion block, the second cushion block and the third cushion block are all box-shaped steel structures, and the first cushion block, the second cushion block and the third cushion block are all welded box-shaped steel structures, so that the cushion beam 4 has great rigidity and bearing capacity, and the elevation of the cushion beam 4 is smaller than the elevation of the steel box girder bridge 13 after the final girder falling, so that the steel box girder bridge 13 can be completely lowered onto the permanent bridge pier.
In a preferred embodiment of the present invention, the heights of the first pad, the second pad and the third pad are smaller than the maximum vertical lifting stroke of the jack 9 of the pushing device, and the heights of the first pad, the second pad and the third pad are also smaller than the maximum vertical lifting stroke of the auxiliary jack 10, so that one pad can be smoothly taken out in each stroke of the jack 9 of the pushing device and the auxiliary jack 10.
In a preferred embodiment of the invention, a lifting lug 11 is arranged at the bottom of a steel box girder bridge 13, a chain block 12 is hung on the lifting lug 11, and holes are formed at the edges of the first cushion block, the second cushion block and the third cushion block; specifically, the lifting lug 11 is welded below the bottom plate of the steel box girder bridge 13; and the edges of the first cushion block, the second cushion block and the third cushion block are all cut with round holes so as to be used as connecting holes for bolting the chain 12, and the first cushion block, the second cushion block and the third cushion block are convenient to dismantle through the chain 12.
In a preferred embodiment of the present invention, the adjacent first cushion blocks, the adjacent second cushion blocks, the adjacent third cushion blocks and the first cushion block structure 5 and the cushion beams 4 are all connected through the bolt pairs 8, so that the integrity between the cushion blocks and the high slip property in the construction process are increased, and the disassembly is convenient.
In a preferred embodiment of the present invention, the plurality of jack 9 of the pushing device in the girder falling structure can realize unified action through computer control and hydraulic driving, so as to realize uniform stress on all supporting points of the steel box girder bridge 13, and the whole descending height, and avoid deformation caused by unbalanced local stress on the steel box girder bridge 13.
Embodiment two:
As shown in fig. 3 and fig. 4, the invention also discloses a method for integrally dropping a steel box girder bridge, which is based on the integral girder dropping structure of the steel box girder bridge in the first embodiment, and specifically comprises the following steps:
Step S1, after the steel box girder bridge 13 is lifted by the jack 9 of the pushing device so that the first cushion block structure 5 and the steel box girder bridge 13 are separated, the steel box girder bridge 13 supports weight by the jack 9 of the pushing device, and the first cushion block of the first cushion block structure 5 at the uppermost position is removed by the chain block 12.
And S2, lowering the jack 9 of the pushing equipment so that the whole weight of the steel box girder bridge 13 falls on the first cushion block structure 5, and emptying the steel box girder bridge 13 and the jack 9 of the pushing equipment.
Step S3, the auxiliary jack 10 is started, and after the third cushion block structure 7 is lifted by the auxiliary jack 10 to enable the jacking equipment jack 9 to be separated from the second cushion block structure 6 (at this time, the weight of the jacking equipment jack 9 is supported by the auxiliary jack 10 and the third cushion block structure 7), the second cushion block positioned at the uppermost position in the second cushion block structure 6 is removed by the chain block 12.
And S4, the auxiliary jack 10 is lowered, so that the jacking equipment jack 9 is lowered onto the second cushion block structure 6, the third cushion block structure 7 is separated from the jacking equipment jack 9, and the third cushion block positioned at the uppermost part of the third cushion block structure 7 is removed.
S5, repeating the steps S1-S4 (restarting the jack 9 of the pushing equipment, integrally jacking the steel box girder bridge 13, starting the girder dropping circulation of the lower wheel) until the height of the steel box girder bridge 13 is reduced to the design required elevation, and stopping to finish girder dropping construction of the steel box girder bridge 13; specifically, in each beam falling cycle process, the first cushion block structure 5, the second cushion block structure 6 and the third cushion block structure 7 are respectively detached to form a cushion block, and when the height of the steel box girder bridge 13 is reduced to the design requirement elevation, the jack 9 of the pushing equipment is stopped to work, so that beam falling construction is completed, and the structure shown in fig. 3 is shown.
It is not difficult to find that this embodiment is an embodiment of a method corresponding to the embodiment of the steel box girder bridge integral girder dropping structure described above, and this embodiment may be implemented in cooperation with the embodiment of the steel box girder bridge integral girder dropping structure described above. The details of the related technology mentioned in the above embodiment of the integral girder dropping structure of the steel box girder bridge are still valid in this embodiment, and in order to reduce repetition, a description thereof is omitted here. Accordingly, the related technical details mentioned in the present embodiment can also be applied in the embodiment of the above-described steel box girder bridge integral girder dropping structure.
Those skilled in the art will understand that the skilled person can implement the modification in combination with the prior art and the above embodiments, and this will not be repeated here. Such modifications do not affect the essence of the present invention, and are not described herein.
The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention, using the methods and technical contents disclosed above, without affecting the essential content of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1.A steel box girder bridge integral girder construction, comprising: the steel frame platform structure, the movable support system and the fixed support system;
The steel box girder bridge is arranged above the steel frame platform structure, the movable supporting system and the fixed supporting system are arranged between the steel frame platform structure and the steel box girder bridge, and the fixed supporting systems are arranged on two sides of the movable supporting system;
The fixed support system comprises a bolster arranged on the steel frame platform structure and a first cushion block structure arranged on the bolster, the first cushion block structure comprises a plurality of first cushion blocks which are overlapped up and down in sequence, the movable support system comprises a pushing equipment jack, a second cushion block structure, an auxiliary jack and a third cushion block structure, the second cushion block structure comprises a plurality of second cushion blocks which are overlapped up and down, the third cushion block structure comprises a plurality of third cushion blocks which are overlapped up and down, the pushing equipment jack is arranged between the steel box girder bridge and the second cushion block structure, the second cushion block structure is arranged on the steel frame platform structure, the auxiliary jack is arranged between the pushing equipment jack and the third cushion block structure, and the third cushion block structure is arranged on the steel frame platform structure;
The steel frame platform structure comprises a steel pipe pile, a distribution beam and a track beam, wherein the distribution beam is arranged on the steel pipe pile, the track beam is paved on the distribution beam along the longitudinal direction of the steel box girder bridge, and the bolster, the second cushion block structure and the auxiliary jack are all arranged on the track beam;
The first cushion block, the second cushion block and the third cushion block are all box-type steel structures.
2. The steel box girder bridge integral girder construction of claim 1, wherein said distribution girder and said track girder are both box structures welded by double-spliced H-section steel.
3. The steel box girder bridge integral girder construction of claim 1, wherein the heights of the first cushion block, the second cushion block and the third cushion block are smaller than the maximum vertical lifting stroke of the jack of the pushing device and the maximum vertical lifting stroke of the auxiliary jack.
4. The steel box girder bridge integral girder construction of claim 1, wherein a lifting lug is arranged at the bottom of the steel box girder bridge, a chain block is hung on the lifting lug, and holes are formed in edges of the first cushion block, the second cushion block and the third cushion block.
5. The steel box girder bridge integral girder construction of claim 1, wherein adjacent ones of said first spacer blocks, adjacent ones of said second spacer blocks, adjacent ones of said third spacer blocks, and said first spacer block construction and said girder blocks are connected by bolt pairs.
6. A steel box girder bridge integral girder dropping method based on the steel box girder bridge integral girder dropping structure as claimed in any one of claims 1 to 5, wherein the girder dropping method comprises the following steps:
step S1, after the steel box girder bridge is lifted by using a jack of a pushing device so that the first cushion block structure and the steel box girder bridge are separated from each other, removing the first cushion block of the first cushion block structure, which is positioned at the uppermost part;
S2, lowering the jack of the pushing equipment so that the whole weight of the steel box girder bridge falls on the first cushion block structure, and taking off the steel box girder bridge and the jack of the pushing equipment;
Step S3, after the auxiliary jack is used for lifting the third cushion block structure so as to enable the jack of the pushing device to be separated from the second cushion block structure, removing the second cushion block positioned at the uppermost position in the second cushion block structure;
s4, the auxiliary jack is lowered, so that the pushing equipment jack is lowered onto the second cushion block structure, the third cushion block structure and the pushing equipment jack are separated from each other, and the third cushion block located at the uppermost position in the third cushion block structure is removed;
And S5, repeating the steps S1 to S4 until the height of the steel box girder bridge is reduced to the design requirement elevation, and stopping to finish the girder falling construction of the steel box girder bridge.
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| CN202010197161.XA CN111254840B (en) | 2020-03-19 | 2020-03-19 | Integral girder falling structure and girder falling method for steel box girder bridge |
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| CN202010197161.XA CN111254840B (en) | 2020-03-19 | 2020-03-19 | Integral girder falling structure and girder falling method for steel box girder bridge |
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| CN111764288A (en) * | 2020-06-22 | 2020-10-13 | 中铁十八局集团有限公司 | Rack falling device and rack falling method |
| CN112359729A (en) * | 2020-10-23 | 2021-02-12 | 浙江毕姆信息科技有限公司 | Subway-striding walking type pushing construction method for single-hole large-span steel box girder |
| CN112431140A (en) * | 2020-12-03 | 2021-03-02 | 武汉思力特种工程机械施工有限公司 | Construction method for performing high-position beam falling of large bridge by means of walking machine |
| CN114790696B (en) * | 2022-04-27 | 2023-10-27 | 中铁重工有限公司 | Construction method for erecting and falling curved steel box girder |
| CN114892540B (en) * | 2022-06-13 | 2024-10-22 | 中交第二公路工程局有限公司 | Walking type pushing device and method for actively adjusting steel truss girder |
| CN115404782A (en) * | 2022-09-13 | 2022-11-29 | 中铁一局集团有限公司 | Steel box girder jacking and girder falling construction method |
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| CN212025933U (en) * | 2020-03-19 | 2020-11-27 | 中国五冶集团有限公司 | Integral beam falling structure of steel box girder bridge |
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| JP4395090B2 (en) * | 2005-03-25 | 2010-01-06 | 株式会社千代田コンサルタント | Replacement method for multi-function bearings on existing bridges |
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