CN115404783A - Sliding construction method for super-wide separated steel box girder of super-large cable-stayed bridge - Google Patents
Sliding construction method for super-wide separated steel box girder of super-large cable-stayed bridge Download PDFInfo
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- CN115404783A CN115404783A CN202211141337.5A CN202211141337A CN115404783A CN 115404783 A CN115404783 A CN 115404783A CN 202211141337 A CN202211141337 A CN 202211141337A CN 115404783 A CN115404783 A CN 115404783A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 108
- 239000010959 steel Substances 0.000 title claims abstract description 108
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 19
- 230000002411 adverse Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 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
- 238000007689 inspection Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- 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
-
- 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
-
- 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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a sliding construction method of an ultra-wide separating type steel box girder of an extra-large cable-stayed bridge, which is characterized in that the ultra-wide separating type steel box girder is hoisted to a placing pier of a supporting structure on the side of a river by a floating crane, an upper beam body and a lower beam body slide through a main tower by a sliding device and then are hoisted by the floating crane, the beams are connected with the upper beam body and the lower beam body by matching pieces and code plates, a left box body, a right box body and the beams synchronously slide to design positions, the line shape is adjusted to meet the monitoring and design requirements, and the realization of the sliding construction comprises the following steps: the device comprises a supporting structure, a steel longitudinal beam, a sliding device, a placing pier and a tensioning structure; the steel longitudinal beam and the placing pier are arranged on the supporting structure and are rigidly connected with the supporting structure; the sliding device consists of a steel rail, a sliding shoe, a jacking oil cylinder, a lateral oil cylinder, a distribution beam, a pushing oil cylinder and a rail clamping device. Compared with the prior art, the ultra-wide separation type steel box girder has the advantages of simple structure, high efficiency, accuracy, safety, synchronous sliding erection, high working efficiency, low labor intensity and safe construction.
Description
Technical Field
The invention relates to the technical field of steel structure bridge construction, in particular to a sliding construction method for an ultra-wide separating type steel box girder of an extra-large cable-stayed bridge.
Background
The extra-large double-tower cable-stayed bridge consists of a side span and a main span, wherein the side span steel box girder is positioned on the shore side and has a longer distance, and the steel box girder is generally transported by a waterway due to larger sections and heavier weight. When the water level is shallow, the floating crane cannot be hoisted, the steel box girder parts are prefabricated, the quantity of supports needed to be erected at bridge positions is large, the field installation period is long, the bridge is affected by adverse environments such as strong wind and rain, and the welding quality of the steel box girder is not easy to guarantee. Therefore, a large quantity of spare parts are not suitable for being installed, and the sliding construction method is a new solution for ensuring the manufacturing quality of the steel box girder and completing the erection of the steel box girder.
The sliding method construction in the prior art adopts one end to set up the hoist engine as traction equipment, and the towed girder steel slides for the girder steel is towed and is advanced, and this method needs to set up the reaction point, and there is counter-force influence steel box girder lower part to support, and it is unfavorable to the lower part support atress, can only realize vertically antedisplacement moreover, can't realize the line type and the position control of roof beam body fast, and the process stability and the synchronism of sliding are poor, and the interval accuracy that slides is low, and the girder segment is crossed the king tower difficulty.
Disclosure of Invention
The invention aims to provide a sliding construction method of an ultra-wide separating type steel box girder of an ultra-wide cable-stayed bridge aiming at the defects of the prior art, a sliding device of a hydraulic self-locking mechanism is adopted to realize the position and linear rapid adjustment of the steel box girder, the sliding device is clamped with a sliding rail through the hydraulic self-locking mechanism, the forward pushing counterforce of the steel box girder is an internal force, the horizontal counterforce of a supporting structure of the steel box girder is smaller, the influence of the horizontal force on a support is greatly reduced, the transverse, longitudinal and height adjustment of the steel box girder is realized, the pushing and falling integrated device is simple in structure, convenient to use and small in support quantity, shortens the field installation period, is slightly influenced by adverse environments such as strong wind, rain and the like, the welding quality of the steel box girder is further ensured, the high-efficiency and high-quality erection of the ultra-wide separating type steel box girder of the ultra-wide cable-stayed bridge is ensured, and the application prospect is good.
The specific technical scheme for realizing the aim of the invention is as follows: a sliding construction method for an ultra-wide separating type steel box girder of an extra-large cable-stayed bridge is characterized in that the ultra-wide separating type steel box girder is hoisted to a placing pier of a supporting structure on the side of a river through a floating crane, an upper beam body and a lower beam body slide through a main tower through a sliding device, then a cross beam is hoisted through the floating crane, the cross beam is connected with the upper beam body and the lower beam body through matching pieces and code plates, a left box body, a right box body and the cross beam synchronously slide to a design position, and the adjustment line shape meets monitoring and design requirements.
This sliding device of steel box girder construction of sliding arranges with cable-stay bridge central line symmetry, and the facility that realizes the construction of steel box girder sliding includes: the device comprises a supporting structure, a steel longitudinal beam, a sliding device, a placing pier and a tensioning structure; the steel longitudinal beam and the placing pier are arranged on the supporting structure and are rigidly connected with the supporting structure; the sliding device consists of a steel rail, a sliding shoe, a jacking oil cylinder, a lateral oil cylinder, a distribution beam, a pushing oil cylinder and a rail clamping device; the steel rails are arranged on the steel longitudinal beams and clamped and pressed by the clamping plates, and the steel rails under the same sliding shoe are arranged in parallel according to the structure of the sliding shoe; the sliding shoes are arranged on the steel rails, and lubricating oil is coated on the steel rails to reduce the friction coefficient; the jacking oil cylinder is arranged on the sliding shoe, and the upper part of the jacking oil cylinder is provided with a distribution beam; the lateral oil cylinder is bolted and fixed with the sliding shoe lateral bracket; four sliding shoes are arranged at the lower part of the steel box girder; the distribution beams and the steel box beams are connected through tension structures, so that the synchronous sliding of the steel box beams is better realized; the tensioning structure is tensioned and fastened through deformed steel bars; the shelving piers are arranged on two sides of the sliding device and are connected with the supporting structure in a welding mode and used for falling the steel box girder, the sliding shoe device is moved out, and the follow-up girder body can slide circularly.
The pushing oil cylinder, the jacking oil cylinder and the lateral oil cylinder of the sliding device adopt a hydraulic synchronous control technology to realize forward movement, linear adjustment and beam falling of the steel box beam.
The steel box girder sliding line shape is determined by an oblique straight line determined by the girder bottom elevation h1 of the sliding starting point and the girder bottom elevation h2 of the sliding terminal point.
The laying piers are symmetrically arranged and supported at the position with good rigidity of the steel box girder diaphragm, and the elevation of the laying piers is determined by linear interpolation of sliding.
And the elevation of the jacking oil cylinder is smaller than that of the laying pier when the cylinder is completely contracted so as to realize the beam falling of the beam body.
The clear distance between the lateral oil cylinder and the placing pier is not less than 50mm, and interference between the lateral oil cylinder and the placing pier is avoided when the sliding shoe deviates.
The tensioning structure realizes no displacement between the sliding device and the beam body, so that the beam body slides longitudinally and synchronously.
Compared with the prior art, the invention has the advantages of high efficiency, accuracy, safety, synchronous sliding erection of the ultra-wide separation type steel box girder, simple structure, convenient use, less support quantity erected at a bridge position, shortening the field installation period, realizing river side hoisting and synchronous sliding towards the shore side of the span separation type steel box girder of the cable-stayed bridge, accurately adjusting the transverse position of the girder section, accurately connecting the crossbeam with the box bodies at two sides and solving the problem that the girder section passes through the main tower. The steel box girders and the cross beams on the two sides are hoisted by the crane ship, large hoisting equipment is not needed on the shore side, the position of the girder section and the linear quick adjustment can be realized, the service cycle of the large hoisting equipment is shortened, the linear adjustment efficiency of the girder section is high, the girder section falls onto the shelving pier after sliding to the design position, the utilization rate of the sliding device is improved, the labor intensity is low, and the steel box girders and the cross beams are economical, efficient and safe and have good application prospects.
Drawings
FIG. 1 is a floor plan of the overall construction of the embodiment;
FIG. 2 is a schematic view of a skid supporting a steel box girder;
FIG. 3 is a schematic view of a slip line;
FIG. 4 is a schematic view of a jacking cylinder and a support structure and a tensioning structure;
FIG. 5 is a schematic view of the structure of the sliding device.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments.
Example 1
Referring to fig. 1-3, support structures 1 are arranged on two sides of a central line of a bridge, ultra-wide separated steel box girders (girder sections) 6 prefabricated in large sections in a factory are transported to a bridge site and hoisted to shelving piers 4 of the support structures 1 on the river side through a floating crane, upper and lower beam bodies slide through a main tower by adopting a sliding device 3, a cross beam 7 is hoisted by the floating crane, the cross beam 7, the upper and lower beam bodies are connected with left and right box bodies of the girder sections 6 through matching pieces and code plates, and the cross beam 7 synchronously slides to a designed position, and the sliding construction of the steel box girders 6 is symmetrically arranged on the central line of a cable-stayed bridge. The unilateral steel box girder 6 is hoisted to the pier 4 of shelving of river side supporting structure 1 through the floating crane, hoists crossbeam 7 after sliding the main tower, and crossbeam 7 slides to the design position with upper and lower walking beam body accordant connection synchronous and falls the roof beam to shelving the pier on, specifically includes following steps:
s1, prefabricating the ultra-wide steel box girder in sections in a factory.
S1, constructing a supporting structure 1, and pre-pressing the supporting structure 1 by 1.1 times of load.
And S2, installing the steel rail 31 after the measuring position, the line shape and the elevation of the construction steel longitudinal beam 2 meet the requirements.
S3, manufacturing a sliding shoe 32, installing a jacking oil cylinder 33, a lateral oil cylinder 34, a pushing oil cylinder 36 and a rail clamping device 37.
S4, according to the sliding line shape determined by the beam bottom elevation h1 of the sliding starting point and the beam bottom elevation h2 of the sliding end point, as shown in detail in the figure 3, the elevation of the resting pier 4 is determined through interpolation, and the resting pier 4 is arranged below the partition plate of the beam section 6 to wrap the gravity center of the beam section.
And S5, lofting to determine the position of the sliding device 3, so that the sliding device is supported on the diaphragm plate of the steel box girder 6.
And S6, installing an oil receiving pipe, a control wire, a cable, a sensor and the like by the sliding device, debugging a pump station and a control system after the inspection is qualified, and debugging in a no-load mode.
And S7, monitoring the axial line of the steel box girder 6, the clamping condition of the sliding shoe 32 and the steel rail 31, the clamping condition of the rail clamping device 37, the load and synchronism of each point and the deformation condition of the supporting structure in the formal sliding process.
And S8, after the steel box girder 6 is slid in place, the steel box girder falls on the laying pier 4, and transverse position, longitudinal position and elevation fine positioning is carried out by using a sliding device, so that welding of a circumferential weld is completed.
And S9, dragging the steel box girder to a hoisting area of the steel box girder on the river side by using a winch to prepare for sliding operation of the lower section girder section.
Referring to fig. 4 to 5, the facility for implementing the sliding construction of the steel box girder includes: the device comprises a supporting structure 1, a steel longitudinal beam 2, a sliding device 3, a laying pier 4 and a tension structure 5; the steel longitudinal beam 2 and the laying pier 4 are arranged on the support structure 1 and are rigidly connected with the support structure 1; the sliding device 3 is composed of a steel rail 31, a sliding shoe 32, a jacking cylinder 33, a lateral cylinder 34, a distribution beam 35, a jacking cylinder 36 and a rail clamping device 37. The steel rails 31 are arranged on the steel longitudinal beam 2 and clamped and pressed by the clamping plates, and the steel rails 31 under the same sliding shoes 32 are arranged in parallel according to the structure of the sliding shoes 32; the sliding shoes 32 are arranged on the steel rails 31, and lubricating oil is coated on the steel rails 31 to reduce the friction coefficient; the jacking oil cylinder 33 is arranged on the skid shoe 32, and the upper part of the jacking oil cylinder 33 is provided with a distribution beam 35; the lateral oil cylinder 34 is bolted and fixed with the sliding shoe 32 through a bracket; four sliding shoes 32 are arranged at the lower part of the steel box girder 6; the distribution beams 35 and the steel box beams 6 and the distribution beams 35 are connected through the tension structures 5, so that the synchronous sliding of the steel box beams 6 is better realized; the tensioning structure 5 is tensioned and fastened through deformed steel bars 51; the shelving piers 4 are arranged on two sides of the sliding device 3 and are connected with the supporting structure 1 in a welding mode and used for falling the steel box girder 6 to move the sliding device 3 out, so that the follow-up girder body can slide circularly.
The invention has been described in further detail in order to avoid limiting the scope of the invention, and it is intended that all such equivalent embodiments be included within the scope of the following claims.
Claims (5)
1. The utility model provides a super wide disconnect-type steel box girder's of super large cable-stay bridge construction method that slides, its characterized in that steel box girder's the construction that slides adopts big section prefabricated super wide disconnect-type steel box girder in the mill to transport to the bridge position, hoist to river side bearing structure through the floating crane on shelving the mound, adopt the displacement device will go up, the low reaches roof beam body slides and crosses the king tower, utilize the floating crane hoist and mount crossbeam, the crossbeam with go up, the low reaches roof beam body passes through matching piece, the left and right box of steel box girder is connected to the sign indicating number board, and the crossbeam slides to the design position in step, it is linear to the designing requirement to adjust, the concrete construction of sliding of steel box girder includes following step:
s1, prefabricating ultra-wide steel box girder sections in a factory;
s1, constructing a support structure, and performing 1.1-time load pre-pressing on the support structure;
s2, constructing a steel longitudinal beam, and installing a steel rail after the measured position, line shape and elevation meet the design requirements;
s3, the installation comprises: the sliding device consists of a sliding shoe, a jacking oil cylinder, a lateral oil cylinder, a pushing oil cylinder and a rail clamping device;
s4, determining the elevation of the resting pier by adopting an interpolation method according to the slippage line shape determined by the beam bottom elevation h1 of the slippage starting point and the beam bottom elevation h2 of the slippage finishing point;
s5, lofting to determine the position of the laying pier, and enabling the laying pier to be supported on the diaphragm plate of the beam section;
s6, installing an oil receiving pipe, a control wire and a sensor on the oil cylinder, and debugging a pump station and a control system;
s7, starting the sliding of the steel box girder after the no-load debugging is qualified, and monitoring the axial line of the steel box girder, the clamping condition of the sliding shoes and the steel rail, the clamping condition of a rail clamping device, the load and synchronism of each point and the deformation condition of a supporting structure in the sliding process;
s8, after the beam section slides in place, the beam section is placed on a placing pier, and transverse position, longitudinal position and elevation fine positioning is carried out by using a sliding device to complete welding of a circumferential weld;
and S9, dragging the steel box girder to a river side steel box girder hoisting area by using a winch to prepare for sliding operation of the next section of girder.
2. The slippage construction method for the ultra-wide separated steel box girder of the extra-large cable-stayed bridge according to claim 1, wherein the slippage device comprises: the steel rail is arranged on a steel longitudinal beam of the supporting structure and is clamped and pressed by a clamping plate; the sliding shoes are arranged on the steel rails to support the steel box girders on the upper parts of the steel rails, and the steel rails under the same sliding shoes are arranged in parallel according to the sliding shoe structure; the jacking oil cylinder is arranged on the sliding shoe; the distribution beam is arranged on the jacking oil cylinder; the lateral oil cylinder is arranged on the sliding shoe and is fixedly connected with the sliding shoe through a bracket and a sliding shoe bolt; four sliding shoes are arranged at the lower part of the steel box girder; the distribution beam is connected with the steel box beam through the tensioning structure, so that the sliding device and the beam body do not have displacement, and the beam body longitudinally slides synchronously; and the tensioning structure is tensioned and fastened through deformed steel bars.
3. The slipping construction method of the ultra-wide separating steel box girder of the extra-large cable-stayed bridge according to claim 1 or claim 2, characterized in that the laying piers are arranged at two sides of the slipping device and are symmetrically supported below a diaphragm plate of the steel box girder for the falling of the steel box girder and the moving out of the slipping device, the elevation of the laying piers is determined by the linear interpolation of slipping, and the laying piers and the supporting structure are welded.
4. The slippage construction method for the ultra-wide separate type steel box girder of the extra-large cable-stayed bridge according to claim 1 or claim 2, wherein the slippage line shape of the steel box girder is determined by an inclined straight line determined by a beam bottom elevation h1 of a slippage starting point and a beam bottom elevation h2 of a slippage ending point.
5. The ultra-wide separation type steel box girder sliding construction method for the extra-large cable-stayed bridge according to claim 1 or claim 2, wherein the jacking oil cylinder, the lateral oil cylinder and the jacking oil cylinder are hydraulically and synchronously controlled to realize forward movement, linear adjustment and girder falling of the steel box girder; the elevation of the jacking oil cylinder when the cylinder is completely contracted is smaller than the elevation of the laying pier so as to realize the beam falling of the beam body; the clear distance between the lateral oil cylinder and the placing pier is not less than 50mm, and interference between the lateral oil cylinder and the placing pier is avoided when the sliding shoe deviates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211141337.5A CN115404783A (en) | 2022-09-20 | 2022-09-20 | Sliding construction method for super-wide separated steel box girder of super-large cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211141337.5A CN115404783A (en) | 2022-09-20 | 2022-09-20 | Sliding construction method for super-wide separated steel box girder of super-large cable-stayed bridge |
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| CN115404783A true CN115404783A (en) | 2022-11-29 |
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| CN202211141337.5A Pending CN115404783A (en) | 2022-09-20 | 2022-09-20 | Sliding construction method for super-wide separated steel box girder of super-large cable-stayed bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286807A (en) * | 2023-11-01 | 2023-12-26 | 保利长大工程有限公司 | Bridge sliding equipment and bridge construction system |
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2022
- 2022-09-20 CN CN202211141337.5A patent/CN115404783A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286807A (en) * | 2023-11-01 | 2023-12-26 | 保利长大工程有限公司 | Bridge sliding equipment and bridge construction system |
| CN117286807B (en) * | 2023-11-01 | 2024-04-30 | 保利长大工程有限公司 | Bridge sliding equipment and bridge construction system |
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