CN111395164B - Steel box girder pushing structure for bridge construction - Google Patents
Steel box girder pushing structure for bridge construction Download PDFInfo
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- CN111395164B CN111395164B CN202010047838.1A CN202010047838A CN111395164B CN 111395164 B CN111395164 B CN 111395164B CN 202010047838 A CN202010047838 A CN 202010047838A CN 111395164 B CN111395164 B CN 111395164B
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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
- 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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- 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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Abstract
The invention discloses a steel box girder pushing structure for bridge construction, and aims to overcome the defects that the steel box girder pushing deviation rectifying operation is inconvenient and the deviation rectifying effect is poor in the construction process of a cable-stayed bridge. The steel box girder temporary pier comprises a plurality of temporary piers, a steel box girder and a pushing assembly arranged on the temporary piers, wherein two pier columns are arranged on the temporary piers, support columns which are used for supporting the steel box girder are arranged on the pier columns, a pushing assembly is arranged between the two support columns on the pier columns, and the pushing assembly comprises a lifting oil cylinder, a lifting seat, a translation oil cylinder, a pushing seat and a translation seat; be equipped with the guide seat of rectifying on the steel box girder lower surface, the lower extreme both sides of the guide seat of rectifying all are equipped with the baffle that leans out the setting, and the guide pulley of rectifying is installed on the translation seat, and the seat is pressed in the installation of translation seat upper end, presses installation reset spring between seat and the translation seat, and articulated two ejector pins of rectifying that lean out the setting from top to bottom on pressing the seat, and the ejector pin of rectifying rotates to be installed on the translation seat, and two ejector pin outer ends of rectifying are laminated respectively on the guide seat left and right sides wall of rectifying.
Description
Technical Field
The invention relates to a bridge construction technology, in particular to a steel box girder pushing structure for bridge construction.
Background
In the bridge construction process, various different working condition environments such as crossing roads, railways, rivers and the like can be met, and different types of bridges are designed according to the different working condition environments of construction positions. A cable-stayed bridge is generally selected for a large-span bridge, the cable-stayed bridge consists of a beam, a cable-stayed cable and a tower column, the beam is pulled on the tower column by a plurality of cable-stayed cables, the cable-stayed bridge belongs to a self-anchored system, and the horizontal force of the cable-stayed cable is borne by the beam. In the construction process, the main span of the cable-stayed bridge needs to adopt a steel box girder structure, the assembled steel box girder is pushed to construct, and the influence on the existing roads and railways is reduced as much as possible. The deviation rectifying operation is needed to be carried out on the assembled steel box girder in the pushing process, so that the steel box girder can be accurately pushed to a set position, but the deviation rectifying operation is inconvenient and the deviation rectifying effect is poor in the actual construction process.
Disclosure of Invention
The invention overcomes the defects of inconvenient steel box girder pushing and deviation rectifying operation and poor deviation rectifying effect in the construction process of a cable-stayed bridge, provides the steel box girder pushing and deviation rectifying structure for bridge construction, greatly facilitates the steel box girder pushing and deviation rectifying operation in the construction process of the cable-stayed bridge, and has good deviation rectifying effect.
In order to solve the technical problems, the invention adopts the following technical scheme: a steel box girder pushing structure for bridge construction comprises a plurality of temporary piers, a steel box girder and pushing assemblies arranged on the temporary piers, wherein two pier columns are arranged on the temporary piers, support columns which are used for supporting the steel box girder are arranged on the pier columns, one pushing assembly is arranged between the two support columns on each pier column, each pushing assembly comprises a lifting oil cylinder, a lifting seat, a translation oil cylinder, a pushing seat and a translation seat, the translation seat can be arranged on the pushing seat in a front-back deflection mode, the lifting oil cylinders are arranged on the pier columns, the lifting seats are connected with telescopic rods of the lifting oil cylinders, the translation oil cylinders are arranged on the lifting seats, and the pushing seats are connected with the telescopic rods of the translation oil cylinders; the steel box girder lower surface is equipped with two U-shaped's of opening down guide seats that rectify along front and back length direction on, the lower extreme both sides of the guide seat that rectifies all are equipped with the baffle that leans out the setting, install two guide pulleys that rectify that respectively towards the guide seat left and right sides wall that rectifies setting on the translation seat, translation seat upper end installation pressure seat, press and install reset spring between the seat, press articulated two ejector pins that rectify that lean out the setting from top to bottom on the seat, the ejector pin that rectifies rotates and installs on the translation seat, two ejector pin outer ends of rectifying are laminated respectively on the guide seat left and right sides wall that rectifies.
When the steel box girder is pushed to be constructed, an assembling platform is firstly erected at one end of the cable-stayed bridge, the steel box girder is arranged on the assembling platform to be assembled, and the steel box girder is pushed forwards while being assembled. During pushing, firstly, the hydraulic system drives the lifting oil cylinder to work, the lifting seat is jacked upwards, the translation seat is supported on the lower surface of the steel box girder to jack the steel box girder to be separated from the supporting column, and the translation seat can be installed on the jacking seat in a front-back deflection mode, so that the translation seat can be attached to the lower surface of the steel box girder in a self-adaptive mode even if the steel box girder is obliquely arranged, and the contact area is increased. And then the hydraulic system drives the translation oil cylinder to work, so that the translation seat and the pushing seat move forwards together for a certain distance, and the steel box girder moves forwards. And then the lifting oil cylinder returns, the steel box beam is supported on the support column, the translation oil cylinder returns, and the actions are repeated continuously, so that the steel box beam moves forwards slowly. When the deviation rectifying guide seat moves to the position above the top pushing assembly, if the steel box girder deviates, the lifting seat is upwards lifted, the deviation rectifying guide wheel is attached to the guide plate to conduct first-stage deviation rectifying, and the deviation rectifying guide wheel upwards lifts along with the lifting seat and simultaneously pushes the deviation rectifying guide seat and the steel box girder to move together to conduct left-right fine adjustment deviation rectifying. And the lifting seat continues to move upwards, and after the pressing seat is abutted to the lower surface of the steel box girder, the pressing seat moves downwards relative to the translation seat, so that the deviation correcting ejector rod is driven to rotate, the end part of the deviation correcting ejector rod is abutted to the inner wall of the deviation correcting guide seat, and the deviation correcting guide seat and the steel box girder are pushed to move together to carry out second-stage deviation correction. And each deviation rectifying guide seat is subjected to deviation rectification once when passing through each pushing assembly, so that the deviation rectifying effect is good. The steel box girder pushing structure for bridge construction greatly facilitates the operation of steel box girder pushing deviation rectification in the construction process of a cable-stayed bridge, and the deviation rectification effect is good.
Preferably, the deviation-correcting ejector rod is provided with a long-strip-shaped sliding groove, the translation seat is provided with a positioning column, and the positioning column and the sliding groove are inserted and connected together. The deviation correcting ejector rod rotates and moves outwards at the same time, and the structure arrangement is convenient for the deviation correcting ejector rod to move and rotate.
Preferably, the translation seat is provided with an articulated shaft, the articulated shaft is articulated on the pushing seat, the articulated shaft is arranged on the left and right sides, the front end and the rear end of the translation seat are connected with positioning springs, and the positioning springs are connected on the pushing seat. The translation seat is connected on the top pushing seat through the articulated shaft, so that the translation seat can deflect front and back, and the positioning spring plays a good positioning role in the translation seat.
Preferably, the front part of the deviation rectifying guide seat is provided with a guide opening, and the width of the guide opening is gradually reduced from front to back. The structure is convenient for the deviation-rectifying guide seat to slide over the pushing assembly.
Preferably, an electromagnet is installed on the translation seat near the upper end. The electromagnet is electrified after the translation seat is attached to the steel box girder, so that the attraction force between the translation seat and the steel box girder is increased, and the pushing process is more reliable.
Preferably, the front end of the steel box girder is provided with a guide girder, the lower surface of the guide girder is provided with two rows of deviation-correcting guide seats, and the deviation-correcting guide seats on the guide girder are correspondingly aligned with the deviation-correcting guide seats on the steel box girder. The guide beam plays a good role in guiding and protecting the steel box girder.
As preferred, the support column upper end articulates there is the supporting seat that can deflect around, and self-adaptation spring is all connected to both sides around the supporting seat, and self-adaptation spring coupling is on the support column. The supporting seat can deflect front and back, and after the supporting seat was supported to the steel box girder, even the steel box girder slope was laid the supporting seat and also can the self-adaptation laminate to the steel box girder lower surface, area of contact is big.
Preferably, a pressing plug and a translation block are slidably mounted on the supporting seat, the pressing plug extends out of the upper end of the supporting seat, the translation block extends out of the side surface of the supporting seat, which faces to the deviation-correcting guide seat, a conical surface is arranged at the lower end of the pressing plug, a pushing surface which is obliquely arranged is arranged on the end surface of the translation block, the conical surface is matched and attached to the pushing surface, the pressing plug moves downwards to push the translation block to move transversely outwards, a piston cavity and an oil pressure cavity are arranged on the translation block, a telescopic piston is matched and mounted in the piston cavity, the telescopic piston extends outwards and is attached to the outer wall of the deviation-correcting guide seat, a butt spring is mounted between the telescopic piston and the translation block, an oil inlet channel, an oil, an oil inlet channel and an oil filling channel are arranged between the abutting spring and the oil through groove and are close to the oil through groove; the push rod of rectifying is installed to oil pressure intracavity adaptation, the push rod of rectifying stretches out outwards, the oil pressure intracavity is equipped with the location bulge loop, the push rod tip of rectifying is equipped with the piston head, the distance of push rod outer end to the guide outer wall of rectifying is the same with the distance of piston head to the location bulge loop, intercommunication notes oil pipe between notes oil passage and the oil pressure chamber, communicate the oil pipe of arranging between oil passage and the notes oil pipe, arrange the one-way oil drain valve of oil pipe upper installation, location bulge loop position installation slidable unblock pole, unblock pole one end is extended and is fixed a position bulge loop tip, the unblock pole other end is stretched out translation piece and tip position and is equipped with the unblock portion that the slope set up, the translation piece is gone up and is installed the locking pole with the locking groove correspondence, connect the locking spring between locking pole and the translation piece, the locking pole lower extreme is equipped with and.
After the steel box girder supports the supporting seat, the pressing plug is pressed downwards, so that the translation block is pushed towards the direction of the deviation-correcting guide seat, and after the pressing plug is pressed in place under normal conditions, the end part of the telescopic piston is just attached to the outer wall of the deviation-correcting guide seat. When the steel box girder deviates, the telescopic piston on one side of the deviation-correcting guide seat is pressed towards the abutting spring, after a certain distance is pressed, the oil through groove reaches the position of the oil inlet channel and the oil injection channel, so that the oil inlet channel and the oil injection channel are mutually communicated, high-pressure oil of a hydraulic system is injected into an oil pressure cavity through the oil inlet channel, the oil injection channel and the oil injection pipe, the deviation-correcting push rod is pushed to move towards the deviation-correcting guide seat, and the end part of the deviation-correcting push rod abuts against the side wall of the deviation-correcting guide seat to push the deviation-correcting guide seat and the steel box girder to carry out left-right fine adjustment and deviation correction. At this time, the locking groove slides over the locking rod, and the locking rod limits the telescopic piston. After the deviation rectifying push rod moves to the bottom, the deviation rectifying guide seat is just moved to an accurate position, the unlocking rod is pushed out outwards by the piston head, the unlocking part is abutted to the pushing column to drive the locking rod to move downwards and slide away from the locking groove, the piston is extended and retracted under the action of the abutting spring, and the oil discharge channel is communicated with the oil return channel. The deviation rectifying push rod returns under the action of the locking spring, and oil in the oil pressure cavity is discharged into an oil groove through the oil injection pipe, the oil discharge channel and the oil return channel. Through the structure, the process that the supporting column supports the steel box girder and the process that the pushing assembly pushes the steel box girder are both subjected to deviation rectifying operation, so that the deviation rectifying effect is greatly improved.
Compared with the prior art, the invention has the beneficial effects that: a steel case roof beam top pushes away the operation of rectifying in the steel case roof beam top greatly has made things convenient for cable-stay bridge work progress for the steel case roof beam top pushes away of bridge construction, and it is effectual to rectify.
Drawings
FIG. 1 is a schematic view of the construction of the present invention;
fig. 2 is a schematic view of a connection structure of the upper end position of the temporary pier of the present invention;
FIG. 3 is a schematic structural diagram of the pushing assembly of the present invention;
FIG. 4 is an enlarged, fragmentary view of the invention at location I of FIG. 3;
FIG. 5 is an enlarged, fragmentary, schematic view of the location II of FIG. 3 of the present invention;
in the figure: 1. temporary piers, 2, steel box girders, 3, pushing components, 4, piers, 5, support columns, 6, lifting cylinders, 7, lifting seats, 8, translation cylinders, 9, pushing seats, 10, translation seats, 11, deviation-correcting guide seats, 12, guide plates, 13, deviation-correcting guide wheels, 14, pressing seats, 15, reset springs, 16, deviation-correcting ejector rods, 17, sliding chutes, 18, positioning columns, 19, articulated shafts, 20, positioning springs, 21, electromagnets, 22, guide beams, 23, supporting seats, 24, adaptive springs, 25, pressing plugs, 26, translation blocks, 27, conical surfaces, 28, pushing surfaces, 29, piston cavities, 30, oil pressure cavities, 31, telescopic pistons, 32, abutting springs, 33, oil inlet channels, 34, oil injection channels, 35, oil return channels, 36, oil discharge channels, 37, oil through channels, 38, locking grooves, 39, push rods, 40, positioning convex rings, 41 and piston heads, 42. the oil filling pipe, 43, oil discharging pipe, 44, one-way oil discharging valve, 45, unlocking rod, 46, unlocking part, 47, locking rod, 48, locking spring, 49, pushing column, 50, mounting groove, 51, rotating shaft, 52, slotted hole, 53, pre-tightening spring, 54, guide surface, 55 and assembling platform.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): a steel box girder pushing structure for bridge construction (see attached figures 1 to 5) comprises a plurality of temporary piers 1, a steel box girder 2 and a pushing assembly 3 arranged on the temporary piers, wherein two pier columns 4 are arranged on the temporary piers, support columns 5 which are used for supporting the steel box girder are arranged on the pier columns, a pushing assembly is arranged between the two support columns on each pier column, the pushing assembly comprises a lifting oil cylinder 6, a lifting seat 7, a translation oil cylinder 8, a pushing seat 9 and a translation seat 10, the translation seat can be arranged on the pushing seat in a front-back deflection mode, the lifting oil cylinder is arranged on the pier columns, the lifting seat is connected with a telescopic rod of the lifting oil cylinder, the translation oil cylinder is arranged on the lifting seat, and the pushing seat is connected with the telescopic rod of the translation oil cylinder; be equipped with two U-shaped's of opening down guide holder 11 of rectifying along front and back length direction on the steel box girder lower surface, the lower extreme both sides of the guide holder of rectifying all are equipped with the baffle 12 that leans out the setting, install two guide pulleys 13 of rectifying towards the guide holder left and right sides wall setting of rectifying respectively on the translation seat, translation seat upper end installation pressure seat 14, install reset spring 15 between pressure seat and the translation seat, it leans out the ejector pin 16 of rectifying that sets up to articulate two from top to bottom on the pressure seat, the ejector pin rotation of rectifying is installed on the translation seat, two ejector pin outer ends of rectifying laminate respectively on the guide holder left and right sides wall of rectifying. The two deviation-correcting ejector rods are arranged in bilateral symmetry, the deviation-correcting ejector rods are provided with long-strip-shaped sliding grooves 17, the translation seat is provided with positioning columns 18, and the positioning columns and the sliding grooves are inserted together. The translation seat upper end is equipped with mounting groove 50, presses the seat lower part to arrange in the mounting groove. The reset spring is arranged between the bottom surface of the mounting groove and the lower end of the pressing seat.
Be equipped with articulated shaft 19 on the translation seat, articulated shaft both ends position all is equipped with articulated seat on the top pushes away the seat, and the articulated shaft articulates on articulated seat on the top pushes away the seat, thereby lay about the articulated shaft and make the translation seat can deflect around, and positioning spring 20 is connected at both ends around the translation seat, and positioning spring connects on the top pushes away the seat. An electromagnet 21 is arranged on the translation seat near the upper end. The front end of the steel box girder is provided with a guide beam 22, the lower surface of the guide beam is provided with two rows of deviation-rectifying guide seats, and the deviation-rectifying guide seats on the guide beam are correspondingly aligned with the deviation-rectifying guide seats on the steel box girder. Support column upper end articulates there is supporting seat 23 that can deflect around, and self-adaptation spring 24 is all connected to both sides around the supporting seat, and self-adaptation spring coupling is on the support column. The supporting seat lower extreme is equipped with the pivot 51 of controlling the setting, and the equal rotatable installation in support column upper end in pivot both ends.
A pressing plug 25 and a translation block 26 are slidably arranged on the supporting seat, the pressing plug extends out of the upper end of the supporting seat, the translation block extends out of the side surface of the supporting seat facing to the deviation-rectifying guide seat, an L-shaped slotted hole 52 is arranged at the upper end of the supporting seat, the pressing plug is arranged at the vertical position of the slotted hole, the translation block is arranged at the horizontal position of the slotted hole, a return spring is arranged between the pressing plug and the supporting seat, the lower end of the pressing plug is provided with a conical surface 27, the end surface of the translation block is provided with a pushing surface 28 which is obliquely arranged, the conical surface is in fit joint with the pushing surface, the pressing plug moves downwards to push the translation block to move transversely outwards, a pre-tightening spring 53 is arranged between the translation block and the supporting seat, the pre-tightening spring is arranged in the slotted hole, the translation block is provided with a piston cavity 29 and an oil pressure cavity 30, a telescopic piston 31 is in fit with the piston cavity, the telescopic piston extends outwards and is in fit with the outer wall of the deviation-rectifying guide seat, and a butt spring 32 is arranged between the telescopic piston and the translation block, the translation block is provided with an oil inlet channel 33, an oil filling channel 34, an oil return channel 35 and an oil discharge channel 36 which are communicated with the inner wall of the piston cavity, the outer wall of the telescopic piston is provided with an oil through groove 37 and a locking groove 38, the oil return channel and the oil discharge channel are both communicated with the oil through groove, and the oil inlet channel and the oil filling channel are arranged between the abutting spring and the oil through groove and are close to the oil through groove; the oil pressure intracavity adaptation installation push rod 39 of rectifying, the push rod of rectifying stretches out outwards, the oil pressure intracavity is equipped with location bulge loop 40, the push rod tip of rectifying is equipped with piston head 41, the distance of the push rod outer end of rectifying to the guide seat outer wall of rectifying is the same with the distance of piston head to location bulge loop, intercommunication oiling pipe 42 between oiling passageway and the oil pressure chamber, intercommunication oil drain pipe 43 between oil drain pipe and the oiling pipe, install one-way oil drain valve 44 on the oil drain pipe, location bulge loop position installation slidable unblock pole 45, unblock pole one end is extended out the location bulge loop tip, the unblock pole other end is stretched out translation piece and the tip position and is equipped with the unblock portion 46 that the slope set up, install coupling spring between unblock pole and the translation piece, on the translation piece with the locking groove correspond and install locking pole 47, connect locking spring 48 between locking pole and the translation piece, the locking pole lower extreme is equipped with and promotes post 49, unblock pole outwards remove and make unblock portion butt drive on the promotion post and drive the locking pole downwards move and slide away from the locking groove. The upper end of the locking rod is provided with a guide surface 54 which is arranged towards the deviation-rectifying guide seat and is obliquely arranged. The oil return channel is communicated with the oil groove, and the oil inlet channel is communicated with the hydraulic system. The front part of the deviation-rectifying guide seat is provided with a guide opening, and the width of the guide opening is gradually reduced from the front to the back. The guide opening position of the deviation-rectifying guide seat is provided with an avoidance notch for avoiding the telescopic piston and the deviation-rectifying push rod.
When the steel box girder is pushed, an assembling platform 55 is firstly erected at one end of the cable-stayed bridge, the steel box girder is arranged on the assembling platform to be assembled, and the steel box girder is pushed forwards while being assembled. During pushing, firstly, the hydraulic system drives the lifting oil cylinder to work, the lifting seat is jacked upwards, the translation seat is supported on the lower surface of the steel box girder to jack the steel box girder to be separated from the supporting column, and the translation seat can be installed on the jacking seat in a front-back deflection mode, so that the translation seat can be attached to the lower surface of the steel box girder in a self-adaptive mode even if the steel box girder is obliquely arranged, and the contact area is increased. And then the hydraulic system drives the translation oil cylinder to work, so that the translation seat and the pushing seat move forwards together for a certain distance, and the steel box girder moves forwards. And then the lifting oil cylinder returns, the steel box beam is supported on the support column, the translation oil cylinder returns, and the actions are repeated continuously, so that the steel box beam moves forwards slowly. When the deviation rectifying guide seat moves to the position above the top pushing assembly, if the steel box girder deviates, the lifting seat is upwards lifted, the deviation rectifying guide wheel is attached to the guide plate to conduct first-stage deviation rectifying, and the deviation rectifying guide wheel upwards lifts along with the lifting seat and simultaneously pushes the deviation rectifying guide seat and the steel box girder to move together to conduct left-right fine adjustment deviation rectifying. And the lifting seat continues to move upwards, and after the pressing seat is abutted to the lower surface of the steel box girder, the pressing seat moves downwards relative to the translation seat, so that the deviation correcting ejector rod is driven to rotate, the end part of the deviation correcting ejector rod is abutted to the inner wall of the deviation correcting guide seat, and the deviation correcting guide seat and the steel box girder are pushed to move together to carry out second-stage deviation correction.
After the steel box girder supports the supporting seat, the pressing plug is pressed downwards, so that the translation block is pushed towards the direction of the deviation-correcting guide seat, and after the pressing plug is pressed in place under normal conditions, the end part of the telescopic piston is just attached to the outer wall of the deviation-correcting guide seat. When the steel box girder deviates, the telescopic piston on one side of the deviation-correcting guide seat is pressed towards the abutting spring, after a certain distance is pressed, the oil through groove reaches the position of the oil inlet channel and the oil injection channel, so that the oil inlet channel and the oil injection channel are mutually communicated, high-pressure oil of a hydraulic system is injected into an oil pressure cavity through the oil inlet channel, the oil injection channel and the oil injection pipe, the deviation-correcting push rod is pushed to move towards the deviation-correcting guide seat, and the end part of the deviation-correcting push rod abuts against the side wall of the deviation-correcting guide seat to push the deviation-correcting guide seat and the steel box girder to carry out left-right fine adjustment and deviation correction. At this time, the locking groove slides over the locking rod, and the locking rod limits the telescopic piston. After the deviation rectifying push rod moves to the bottom, the deviation rectifying guide seat is just moved to an accurate position, the unlocking rod is pushed out outwards by the piston head, the unlocking part is abutted to the pushing column to drive the locking rod to move downwards and slide away from the locking groove, the piston is extended and retracted under the action of the abutting spring, and the oil discharge channel is communicated with the oil return channel. The deviation rectifying push rod returns under the action of the locking spring, and oil in the oil pressure cavity is discharged into an oil groove through the oil injection pipe, the oil discharge channel and the oil return channel. And each deviation rectifying guide seat is subjected to deviation rectification once when passing through each pushing assembly, so that the deviation rectifying effect is good. Through the structure, the process that the supporting column supports the steel box girder and the process that the pushing assembly pushes the steel box girder are both subjected to deviation rectifying operation, so that the deviation rectifying effect is greatly improved.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (7)
1. A steel box girder pushing structure for bridge construction is characterized by comprising a plurality of temporary piers, steel box girders and pushing assemblies arranged on the temporary piers, wherein the temporary piers are provided with two pier columns, the pier columns are provided with support columns which are used for supporting the steel box girders, a pushing assembly is arranged between the two support columns on the pier columns, the pushing assembly comprises a lifting oil cylinder, a lifting seat, a translation oil cylinder, a pushing seat and a translation seat, the translation seat can be arranged on the pushing seat in a front-back deflection mode, the lifting oil cylinder is arranged on the pier columns, the lifting seat is connected with a telescopic rod of the lifting oil cylinder, the translation oil cylinder is arranged on the lifting seat, and the pushing seat is connected with the telescopic rod of the translation oil cylinder; two rows of U-shaped deviation-rectifying guide seats with downward openings are arranged on the lower surface of the steel box girder along the front-rear length direction, guide plates which are obliquely arranged outwards are arranged on two sides of the lower end of each deviation-rectifying guide seat, two deviation-rectifying guide wheels which are respectively arranged towards the left side wall and the right side wall of each deviation-rectifying guide seat are arranged on each translation seat, a pressing seat is arranged at the upper end of each translation seat, a reset spring is arranged between each pressing seat and each translation seat, two deviation-rectifying ejector rods which are obliquely arranged from top to bottom are hinged on each pressing seat, the deviation-rectifying ejector rods are rotatably arranged on the translation seats, and the outer ends of the two deviation-rectifying ejector rods are respectively attached to the left side wall and the right side wall of each deviation-rectifying guide seat; the deviation-correcting ejector rod is provided with a long-strip-shaped sliding groove, the translation seat is provided with a positioning column, and the positioning column and the sliding groove are inserted together.
2. The pushing structure of steel box girder according to claim 1, wherein the translation seat is provided with a hinge shaft hinged to the pushing seat, the hinge shaft is disposed at left and right sides, and the front and rear ends of the translation seat are connected to the positioning springs connected to the pushing seat.
3. The incremental launching structure for steel box girders of claim 1, wherein the front part of the deviation-rectifying guide seat is provided with a guide opening, and the width of the guide opening is gradually reduced from front to back.
4. The steel box girder incremental launching structure for bridge construction as recited in claim 1, wherein an electromagnet is installed on the translation seat near the upper end.
5. The incremental launching structure of a steel box girder for bridge construction as recited in claim 1, wherein the front end of the steel box girder is provided with a guide beam, the lower surface of the guide beam is provided with two rows of deviation-rectifying guide seats, and the deviation-rectifying guide seats on the guide beam are aligned with the deviation-rectifying guide seats on the steel box girder correspondingly.
6. The incremental launching structure for steel box girders of claim 1 to 5, wherein the upper end of the supporting column is hinged with a supporting seat capable of deflecting back and forth, the front and back sides of the supporting seat are connected with adaptive springs, and the adaptive springs are connected with the supporting column.
7. The steel box girder pushing structure for bridge construction as claimed in claim 6, wherein the supporting seat is slidably mounted with a pressing plug and a translation block, the pressing plug extends out of the upper end of the supporting seat, the translation block extends out of the side of the supporting seat facing the deviation-correcting guide seat, the lower end of the pressing plug is provided with a conical surface, the end surface of the translation block is provided with a pushing surface which is obliquely arranged, the conical surface is fitted with the pushing surface, the pressing plug moves downwards to push the translation block to move transversely outwards, the translation block is provided with a piston cavity and an oil pressure cavity, a telescopic piston is fitted in the piston cavity, the telescopic piston extends outwards and is fitted with the outer wall of the deviation-correcting guide seat, a spring is mounted between the telescopic piston and the translation block, the translation block is provided with an oil inlet channel, an oil injection channel, an oil return channel and an oil discharge channel, the oil discharge channel is provided with an oil through groove and a locking groove, and the oil return channel is communicated with the inner wall of the piston cavity, The oil inlet channel and the oil filling channel are arranged between the abutting spring and the oil through groove and are close to the oil through groove; the push rod of rectifying is installed to oil pressure intracavity adaptation, the push rod of rectifying stretches out outwards, the oil pressure intracavity is equipped with the location bulge loop, the push rod tip of rectifying is equipped with the piston head, the distance of push rod outer end to the guide outer wall of rectifying is the same with the distance of piston head to the location bulge loop, intercommunication notes oil pipe between notes oil passage and the oil pressure chamber, communicate the oil pipe of arranging between oil passage and the notes oil pipe, arrange the one-way oil drain valve of oil pipe upper installation, location bulge loop position installation slidable unblock pole, unblock pole one end is extended and is fixed a position bulge loop tip, the unblock pole other end is stretched out translation piece and tip position and is equipped with the unblock portion that the slope set up, the translation piece is gone up and is installed the locking pole with the locking groove correspondence, connect the locking spring between locking pole and the translation piece, the locking pole lower extreme is equipped with and promotes the post, unblock pole outwards remove and make unblock portion butt drive locking pole downstream slip from the locking groove on promoting the post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047838.1A CN111395164B (en) | 2020-01-16 | 2020-01-16 | Steel box girder pushing structure for bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047838.1A CN111395164B (en) | 2020-01-16 | 2020-01-16 | Steel box girder pushing structure for bridge construction |
Publications (2)
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| JP3394026B2 (en) * | 2000-10-17 | 2003-04-07 | 株式会社大滝油圧 | Guide device for delivery and erection of bridge girder etc. |
| CN201678949U (en) * | 2010-03-23 | 2010-12-22 | 柳州欧维姆机械股份有限公司 | Walking type pushing device |
| CN102493348B (en) * | 2011-12-14 | 2014-12-10 | 中铁大桥局股份有限公司 | Transverse limitation and correction device for incremental launching of bridge |
| CN204676433U (en) * | 2015-05-22 | 2015-09-30 | 福建省工业设备安装有限公司 | The Hydraulic Deviation-correcting Device of steel box-girder traction slippage |
| CN207277217U (en) * | 2017-10-13 | 2018-04-27 | 南京交通工程有限公司 | The limiter of box beam pushing tow |
| CN208183537U (en) * | 2018-02-02 | 2018-12-04 | 武汉思力特种工程机械施工有限公司 | A kind of 450 tons of stride machine pushing tow systems |
| CN110344338A (en) * | 2019-08-13 | 2019-10-18 | 重庆恒庐钢结构工程有限公司 | A kind of bridge in-site installation jacking transferring equipment |
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