CN112482243B - Large cantilever steel truss transverse dragging construction fabricated deviation rectifying device and construction method - Google Patents
Large cantilever steel truss transverse dragging construction fabricated deviation rectifying device and construction method Download PDFInfo
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- CN112482243B CN112482243B CN202011421309.XA CN202011421309A CN112482243B CN 112482243 B CN112482243 B CN 112482243B CN 202011421309 A CN202011421309 A CN 202011421309A CN 112482243 B CN112482243 B CN 112482243B
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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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
- E01D6/00—Truss-type 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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses a large cantilever steel truss transverse dragging construction assembled deviation correcting device and a construction method. The invention relates to a transverse dragging construction method of a large cantilever steel truss girder, which adopts an assembled deviation correcting device for transverse dragging construction of the large cantilever steel truss girder. The invention can correct the deviation by the horizontal deviation correcting jack no matter which side the large cantilever steel truss girder deviates, and the large cantilever steel truss girder can be dragged smoothly in the transverse direction.
Description
Technical Field
The invention relates to a deviation correcting device for transverse dragging construction of a steel truss girder and a construction method.
Background
The steel truss girder is another bridge engineering structure form which is widely applied after reinforced concrete bridges and steel box girders, and has the advantages of strong spanning capability, small influence on existing lines, high altitude operation to ground operation, high installation speed, convenience in transportation, high economic benefit and the like. The technology suitable for steel truss girder construction comprises pushing construction, hoisting and splicing construction, dragging construction and the like, wherein the dragging construction can be well suitable for structures such as railways, urban roads, riverways and the like with limited upper clear height, the influence on traffic lines under bridges is small, and the construction speed is high. The transverse dragging construction is a construction method that temporary supports are erected along the bridge direction, manufactured steel truss girder sections are assembled at a high position, then transverse slideways are installed, and finally a dragging rope drags the whole steel truss girder to a designed bridge position under the pushing of a jack.
However, with the large number of applications of the drag construction, the hidden defects of the construction process appear successively. Traditional construction process does not set up special spacing deviation correcting device, and in the construction process of dragging, because reasons such as temporary structure construction errors such as jack oil pressure is unstable, slides are big, the coefficient of friction changes always, leads to a plurality of jack atresss asynchronous, and the deviation that steel longeron appears in the sideslip is more and more big, will stop the operation when serious and rectify the adjustment, seriously influences the efficiency of construction. In addition, the intelligent limit deviation rectifying research is relatively few at present, the intelligent control is realized, the remote control can be realized, a large amount of manpower and material resources are saved, the continuous construction operation of the steel truss girder can be mainly carried out, and the construction efficiency is greatly improved. The above problems have not been studied yet.
Patent with publication number CN206143637U proposes a longitudinal and transverse movement adjusting device for a steel truss, which is provided with longitudinal and transverse jacks respectively and cooperates with a counterforce seat, a copy backing plate and the like to work together to realize attitude adjustment in the pushing process of the steel truss, however, when sliding friction between the jacks and a beam body is too large, the movement of the steel truss will be greatly influenced; the patent with publication number CN209584863U provides a limiting or deviation rectifying structure for pushing a steel truss, and the purpose of real-time deviation rectifying of the steel truss in the pushing process is achieved by arranging a jack, a limiting box and deviation rectifying wheels in a deviation rectifying groove.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides an assembled deviation correcting device for transverse dragging construction of a large cantilever steel truss girder, which can smoothly drag the large cantilever steel truss girder transversely and can longitudinally correct the deviation on two sides.
In order to solve the technical problem, the assembled deviation correcting device for the transverse dragging construction of the large cantilever steel truss girder comprises a slide way, a slide block and two horizontal deviation correcting jacks, wherein the slide block is arranged on the slide way in a sliding mode, one ends of the two horizontal deviation correcting jacks are fixed to the two sides of the slide block respectively, the other ends of the two horizontal deviation correcting jacks are supported on the two side faces of the slide way respectively, an adjusting base plate is placed at the top of the slide block, one end, supported on the slide way, of each horizontal deviation correcting jack is provided with a roller, and each horizontal deviation correcting jack is supported on the side face of the slide way through the roller.
In order to reduce the friction force of the sliding block on the sliding way, a sliding plate is fixed on the sliding way, and the sliding block is in sliding contact with the sliding plate.
Preferably, the sliding plate is a fiber resin sliding plate.
For the convenience of manufacturing at high altitude, the slider include roof and two half sliders, half slider includes slide and jack support, the slide slides and sets up on the slide, the jack support is fixed on the side of slide, the level jack of rectifying is installed on the bottom surface of jack support, the level jack of rectifying is provided with the jack protective housing of fixing on the jack support outward, the level jack of rectifying supports the one end outside the slide and stretches out outside the jack protective housing, bolted connection is passed through with the top surface of two slides to the roof, bolted connection is passed through to the side that two slides are adjacent.
In order to realize intelligent control, including the master control platform, the both sides of slide respectively be provided with a laser displacement sensor who is used for measuring the horizontal distance with the side that the slide is adjacent, laser displacement sensor and jack protective housing fixed connection, laser displacement sensor and level jack of rectifying all connect the master control platform, the master control platform is used for receiving laser displacement sensor's detected data and according to laser displacement sensor's detected data control level jack of rectifying.
In order to facilitate the installation of the sliding block, the top plate is connected with the edge of one side, close to the outside, of the top surface of each sliding seat through two first bolts, the four first bolts are arranged into a rectangle, the first installation holes for connecting the first bolts on the top plate are formed by intersecting concentric semicircular holes and fan-shaped holes, the radius of each fan-shaped hole is larger than that of each semicircular hole, filling blocks are arranged in the fan-shaped holes, the semicircular holes are located on the outer sides of the fan-shaped holes, the holes for installing the first bolts on the sliding seats are second installation holes, the first bolts comprise nuts, a polished rod and a stud which are coaxially connected in sequence, the filling blocks are fixed on the polished rod of the first bolts and tightly attached to the nuts, the outer diameter of the stud is not larger than the diameter of the polished rod, the height of the polished rod is equal to the sum of the heights of the first installation holes and the second installation holes, nuts are connected to the lower side threads of the first bolts, gaskets are arranged between the first bolts and the nuts, and the polished rod is located in the first installation holes and the second installation holes.
The invention discloses a transverse dragging construction method of a large cantilever steel truss girder, which adopts any one of the assembled deviation correcting devices for the transverse dragging construction of the large cantilever steel truss girder, and comprises the following steps: the method comprises the following steps of (1) fixing a slide way on an assembly support and a bridge pier of the large cantilever steel truss girder, (2) installing a sliding block on the slide way, (3) placing an adjusting base plate on the sliding block, placing the large cantilever steel truss girder on the adjusting base plate on the sliding block, and (4) dragging the large cantilever steel truss girder to an installation position on the bridge pier by dragging the sliding block on the slide way, and correcting the position of the large cantilever steel truss girder, which is perpendicular to the guide direction of the slide way, by two horizontal deviation rectifying jacks in the dragging process.
In order to install the slide block rapidly, the invention large cantilever steel truss girder transverse dragging construction method, the step (2) includes the step (2-1) to place two slide bases on the slideway, and make the adjacent side of two slide bases close together, two horizontal deviation rectifying jacks face the corresponding side on the slideway; (2-2) placing the top plate on the two sliding seats, connecting the top plate with the two sliding seats through four first bolts, wherein the first bolts are loosely fixed, the top plate can slide on the sliding seats, and the filling block is positioned above one side of the top plate where the fan-shaped holes are located; (2-3) starting the two horizontal deviation-rectifying jacks to enable the horizontal deviation-rectifying jacks to slowly extend out to be supported on the side faces of the slide ways until the two slide bases are separated, enabling the four first bolts to enter and be attached to semicircular holes of the first mounting holes in the top plate, and enabling the filling block to move right above the fan-shaped holes; (2-4) dropping the filling block into the fan-shaped hole of the first mounting hole, applying force to screw down a nut at the lower end of the first bolt, fixing the top plate and the sliding seats, and connecting two adjacent sides of the two sliding seats through second bolts; and (2-5) starting the two horizontal deviation rectifying jacks to adjust the position of the sliding block on the slideway so that the detection distance of the two laser displacement sensors is equal to the set distance.
In order to ensure that the two sliding seats are connected more reliably, the second bolt is sleeved with a backing plate on the part between the two sliding seats.
The invention has the beneficial effects that: according to the invention, the horizontal deviation rectifying jacks are arranged on the two sides of the slideway, the deviation can be rectified by the horizontal deviation rectifying jacks no matter which side the large cantilever steel truss girder deflects, the jacks do not directly act on the large cantilever steel truss girder, the jacks are not required to support the large cantilever steel truss girder, the movement resistance of the jacks is small, the transverse dragging of the large cantilever steel truss girder is hardly influenced, and the large cantilever steel truss girder is smoothly dragged transversely.
Drawings
FIG. 1 is a schematic structural view of a large cantilever steel truss girder of the invention in a transverse dragging state;
FIG. 2 is a schematic top view of the slider (with the top plate removed) according to the present invention;
FIG. 3 is a schematic structural view of the slideway of the present invention;
FIG. 4 is a schematic view of the connection structure of the sliding base and the horizontal deviation rectifying jack according to the present invention;
FIG. 5 is a schematic view of the top plate and the slide base after initial positioning;
FIG. 6 is a schematic view of the positions of the first bolt, the filler block and the first mounting hole in the initial positioning of the top plate and the slide base according to the present invention;
FIG. 7 is a schematic view of the positions of the first bolt, the filler block and the first mounting hole in the state where the positioning of the top plate and the slide base is completed according to the present invention;
FIG. 8 is a schematic view of the connection structure of the first bolt with the top plate and the slide carriage according to the present invention;
FIG. 9 is a schematic view of a vertical structure of a horizontal deviation correcting jack;
FIG. 10 is a schematic cross-sectional view of the horizontal deviation rectifying jack;
in the figure: 1, a sliding plate; 2, a main control console; 3, a large cantilever steel truss girder; 4, adjusting the base plate; 5, a top plate; 6 a first bolt; 7 vertically penetrating stiffening ribs; 8 a second bolt; 9 transversely assembling bolt holes; 10, a slide block; 10-1 slide seat, 10-2 jack support seat and 11 slideway; 12 laser displacement sensor; 13 a bottom stiffener; 14, a back stiffening rib of the jack; 15 jack protective shell; 16 horizontal deviation rectifying jack; 17 a jack housing; 18 ejector rods; a 19U-shaped frame; 20 rollers; 21 a roller shaft; 22 filling blocks; 23 a first mounting hole; 24 second mounting holes, 25 washers, 26 nuts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, figure 2 and figure 3, the large cantilever steel truss girder transverse dragging construction fabricated deviation correcting device comprises a main control console 2, a slide rail 11, a slide block 10 and two horizontal deviation correcting jacks 16, wherein the slide rail 11 is fixedly arranged, the top surface of the slide rail 11 is fixedly provided with a slide plate 1, the slide plate 1 can adopt a fiber resin slide plate (MEG plate), the slide block is arranged on the slide plate 1 in a sliding manner, one ends of the two horizontal deviation correcting jacks 16 are respectively fixed on two sides of the slide block 10, and an adjusting base plate 4 is placed at the top of the slide block. The two sides of the slideway are respectively provided with a laser displacement sensor 12 for measuring the horizontal distance of the side surface adjacent to the slideway 11, the laser displacement sensors 12 and the horizontal deviation rectifying jacks 16 are both connected with the main control platform 2, and the main control platform 2 is used for receiving the detection data of the laser displacement sensors 12 and controlling the horizontal deviation rectifying jacks 16 according to the detection data of the laser displacement sensors 12.
As shown in fig. 1 and 2, the sliding block 10 is of an assembly type structure, the sliding block 10 comprises a top plate 5 and two half sliding blocks, each half sliding block comprises a sliding seat 10-1 and a jack support 10-2, each sliding seat 10-1 and each jack support 10-2 are square bodies formed by welding steel plates, and vertical through stiffening ribs 7 and bottom surface stiffening ribs 13 are welded in each sliding seat 10-1 and each jack support 10-2. The sliding base 10-1 is arranged on the sliding plate 1 of the slideway 11 in a sliding mode, the jack support 10-2 is fixed on the side face of the sliding base 10-1, the horizontal deviation rectifying jack 16 is installed on the bottom face of the jack support 10-2, a jack protective shell 15 fixed on the jack support 10-2 is arranged outside the horizontal deviation rectifying jack 16, and in order to prevent the horizontal deviation rectifying jack 16 from generating a stress concentration phenomenon, a certain number of jack back stiffening ribs 14 are welded on the outer side of the jack protective shell 15. As shown in fig. 9 and 10, the horizontal deviation-correcting jack 16 includes a jack housing 17, a push rod 18, a U-shaped frame 19, a roller 20 and a roller rotating shaft 21, one end of the push rod 18 is inserted into the jack housing 17, the other end extends out, the U-shaped frame 19 is fixed on the end of the push rod 18 extending out, and the roller 20 is rotatably disposed on the U-shaped frame 19 through the roller rotating shaft 21. The horizontal deviation-correcting jack 16 is supported on the side face of the slide rail 11 through a roller 20, the ejector rod 18 extends out of the jack protective shell 15, the top plate 5 is connected with the top faces of the two slide bases 10-1 through four first bolts 6, and the adjacent side faces of the two slide bases 10-1 are connected through second bolts 8. The laser displacement sensor 12 is fixedly connected with the jack protective shell 15.
As shown in fig. 1, 2, 5 and 8, the top plate 5 and the edge of the outer side of the top surface of each sliding seat 10-1 are respectively connected through two first bolts 6, four first bolts 6 are arranged in a rectangle, a first mounting hole 23 for connecting the first bolt 6 on the top plate 5 is formed by intersecting concentric semicircular holes and fan-shaped holes, the radius of each fan-shaped hole is larger than that of the semicircular hole, a filling block 22 is arranged in each fan-shaped hole, the semicircular holes are positioned on the outer sides of the fan-shaped holes, the hole for mounting the first bolt 6 on the sliding seat 10-1 is a second mounting hole 24, the first bolt 6 comprises a nut 6-1, a polished rod 6-2 and a stud 6-3 which are coaxially connected in sequence, the filling block 22 is fixed on the polished rod 6-2 of the first bolt 6 and tightly attached to the polished rod 6-1, the outer diameter of the stud 6-2 is not larger than the diameter of the polished rod 6-2, the height of the polished rod 6-2 is equal to the sum of the heights of the first mounting hole 23 and the second mounting hole 24, a nut 26 is positioned between the sliding seat 6-1 and the second mounting hole 26, and the nut 24 are positioned in the first bolt 6-2.
A construction method for transversely dragging a large cantilever steel truss girder adopts the fabricated deviation correcting device for the transverse dragging construction of the large cantilever steel truss girder, and comprises the following steps:
(1) Fixing the slide way on an assembly support and a pier of the large cantilever steel truss girder 3;
(2) Mounting the slider 10 to the slideway 11;
the installation of the slide block 10 is in the high-altitude operation, because the slide block 10 should bear the weight of the steel truss beam with the big cantilever, therefore the volume and the weight are bigger, make two parts splice, connect the two parts together through the bolt of roof and both sides, can reduce the difficulty of making and installing, because it is difficult to align four locating holes once when connecting roof and slide, therefore, the conventional installation mode is time-consuming and laborious, step (2) can realize utilizing two horizontal deviation rectifying jacks 16 of the deviation rectifying device to install the slide block 10 fast, and the machining precision requirement to the slide block 10-1 is smaller, only after two slide blocks 10-1 draw close together, the second installation hole can enter the scope where the first installation hole locates, do not need the hole of the same size to align completely, it is more favorable to make the slide block 10-1 and install the slide block at the high altitude scene.
(2-1) placing the two sliding seats 10-1 on the slideway 11, enabling the adjacent side surfaces of the two sliding seats 10-1 to be close, and enabling the two horizontal deviation rectifying jacks 16 to be right opposite to the corresponding side surfaces on the slideway 11;
(2-2) placing a top plate 5 on the two sliding seats 10-1, connecting the top plate 5 with the two sliding seats 10-1 through four first bolts 6, wherein the first bolts 6 are loosely fixed, the top plate 5 can slide on the sliding seats 10-1, and a filling block 22 is positioned above one side of the top plate 5 where the fan-shaped holes are positioned;
(2-3) starting the two horizontal deviation-correcting jacks 16 to enable ejector rods 18 of the horizontal deviation-correcting jacks 16 to slowly extend out to enable the rollers 20 to be supported on the side surfaces of the slide ways 11 until the two slide bases 10-1 are separated, enabling the four first bolts 6 to enter and be attached to semicircular holes of first mounting holes 23 in the top plate 5, and enabling the filling block 22 to move right above the fan-shaped hole;
(2-4) dropping the filling block 22 into the fan-shaped hole of the first mounting hole 23, if the filling block 22 does not slide in place on the top plate 5 and then automatically drops into the fan-shaped hole, pressing or slightly rotating the first bolt 6 by external force until the filling block 22 drops into the fan-shaped hole, at the moment, limiting the first bolt 6 by the filling block 22 and preventing the first bolt from rotating, applying force to tighten a nut at the lower end of the first bolt 6, fixing the top plate 5 and the sliding seat 10-1, and then installing and tightening the second bolt 8; the adjacent side surfaces of the two sliding seats 10-1 are provided with support lugs, the support lugs are provided with transverse assembling bolt holes 9, a base plate is arranged between the two support lugs, and a second bolt 8 penetrates through the support lugs and the base plate and is tightened by a nut. Thereby firmly connecting the top plate 5 and the two sliders 10-1 into a whole.
And (2-5) starting the two horizontal deviation rectifying jacks 16 to adjust the position of the sliding block 10 on the slideway 11 until the detection distance of the two laser displacement sensors 12 is equal to the set distance.
(3) Placing an adjusting base plate 4 on the sliding block 10, and placing the large cantilever steel truss girder 3 on the adjusting base plate 4 on the sliding block 10;
(4) The large cantilever steel truss girder 3 is dragged to the installation position on the pier by the dragging of the sliding block 10 on the slideway 11 through the dragging rope, and the two horizontal deviation rectifying jacks 16 are controlled to rectify the position of the large cantilever steel truss girder 3 vertical to the guiding direction of the slideway 11 according to the detection data of the laser displacement sensor 12 in the dragging process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a big cantilever steel longeron transversely drags construction assembled deviation correcting device which characterized in that: the device comprises a slide way, a slide block and two horizontal deviation rectifying jacks, wherein the slide block is arranged on the slide way in a sliding manner, one ends of the two horizontal deviation rectifying jacks are respectively fixed on two sides of the slide block, the other ends of the two horizontal deviation rectifying jacks are respectively supported on two side surfaces of the slide way, an adjusting base plate is arranged at the top of the slide block, one end of the horizontal deviation rectifying jack, which is supported on the slide way, is provided with a roller, and the horizontal deviation rectifying jack is supported on the side surface of the slide way through the roller; the sliding blocks comprise a top plate and two half sliding blocks, each half sliding block comprises a sliding seat and a jack support, the sliding seats are arranged on the sliding ways in a sliding mode, the jack supports are fixed on the side faces of the sliding seats, the horizontal deviation correcting jack is installed on the bottom face of the jack support, a jack protective shell fixed on the jack support is arranged outside the horizontal deviation correcting jack, one end, supported outside the sliding ways, of the horizontal deviation correcting jack extends out of the jack protective shell, the top plate is connected with the top faces of the two sliding seats through bolts, and the adjacent side faces of the two sliding seats are connected through bolts; the top plate is connected with the edge of one side, close to the outside, of the top surface of each sliding seat through two first bolts, the four first bolts are arranged into a rectangle, the first mounting holes, used for being connected with the first bolts, on the top plate are formed by intersecting concentric semicircular holes and fan-shaped holes, the radius of each fan-shaped hole is larger than that of the corresponding semicircular hole, a filling block is arranged in each fan-shaped hole, the semicircular holes are located on the outer sides of the corresponding fan-shaped holes, the holes, used for mounting the first bolts, in the sliding seats are second mounting holes, the first bolts comprise nuts, polished rods and screw bolts which are coaxially connected in sequence, the filling blocks are fixed on the polished rods of the first bolts and tightly attached to the nuts, the outer diameters of the screw bolts are not larger than the diameters of the polished rods, the heights of the polished rods are equal to the sum of the heights of the first mounting holes and the second mounting holes, nuts are connected to the lower sides, located in the second mounting holes, of the first bolts, nuts are connected with the nuts through threads, gaskets are arranged between the sliding seats and the nuts, and the polished rods are located in the first mounting holes and the second mounting holes;
the laser displacement sensor is fixedly connected with the jack protective shell, the laser displacement sensor and the horizontal deviation rectifying jack are both connected with the main control console, and the main control console is used for receiving detection data of the laser displacement sensor and controlling the horizontal deviation rectifying jack according to the detection data of the laser displacement sensor; a sliding plate is fixed on the slide way, and the sliding block is in sliding contact with the sliding plate; the sliding plate is a fiber resin sliding plate;
the side surfaces of the two sliding seats adjacent to each other are provided with support lugs, the support lugs are provided with transverse assembling bolt holes, a base plate is arranged between the two support lugs, and a second bolt penetrates through the support lugs and the base plate.
2. A large cantilever steel truss transverse dragging construction method, which adopts the large cantilever steel truss transverse dragging construction fabricated deviation correcting device as claimed in claim 1, and comprises the following steps:
(1) The slideway is fixed on an assembly bracket and a pier of the large cantilever steel truss girder,
(2) The slide block is arranged on the slide way,
(3) Placing an adjusting base plate on a sliding block, placing the large cantilever steel truss girder on the adjusting base plate on the sliding block, (4) dragging the large cantilever steel truss girder to the installation position on a bridge pier by sliding the dragging sliding block on a slideway, and correcting the position of the large cantilever steel truss girder, which is vertical to the guiding direction of the slideway, by two horizontal deviation-correcting jacks in the dragging process;
the step (2) comprises the following steps:
(2-1) placing the two sliding seats on the slideway, enabling the adjacent side surfaces of the two sliding seats to be close, and enabling the two horizontal deviation rectifying jacks to face the corresponding side surfaces on the slideway;
(2-2) placing the top plate on the two sliding seats, connecting the top plate with the two sliding seats through four first bolts, wherein the first bolts are loosely fixed, the top plate can slide on the sliding seats, and the filling block is positioned above one side of the top plate where the fan-shaped holes are located;
(2-3) starting the two horizontal deviation-rectifying jacks to enable the horizontal deviation-rectifying jacks to slowly extend out to be supported on the side faces of the slide ways until the two slide bases are separated, enabling the four first bolts to enter and be attached to semicircular holes of the first mounting holes in the top plate, and enabling the filling block to move right above the fan-shaped holes;
(2-4) dropping the filling block into the fan-shaped hole of the first mounting hole, applying force to screw down a nut at the lower end of the first bolt, fixing the top plate and the sliding seats, and connecting two adjacent sides of the two sliding seats through second bolts;
and (2-5) starting the two horizontal deviation rectifying jacks to adjust the positions of the sliding blocks on the slide ways so that the detection distance of the two laser displacement sensors is equal to the set distance.
3. The large cantilever steel truss girder transverse dragging construction method according to claim 2, characterized in that: the second bolt is sleeved with a backing plate at the part between the two sliding seats.
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| CN202011421309.XA CN112482243B (en) | 2020-12-08 | 2020-12-08 | Large cantilever steel truss transverse dragging construction fabricated deviation rectifying device and construction method |
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| CN113123250B (en) * | 2021-05-10 | 2023-03-14 | 南通帆森能源科技有限公司 | Precise assembling and adjusting device for steel truss girder and assembling construction method |
| CN114000440A (en) * | 2021-12-13 | 2022-02-01 | 中铁一局集团有限公司 | Truss base installation cantilever structure device and method |
| CN114753266A (en) * | 2022-05-13 | 2022-07-15 | 中铁十六局集团路桥工程有限公司 | Real-time deviation rectifying device and method for steel truss girder dragging construction |
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| CN102041782B (en) * | 2010-12-10 | 2013-01-23 | 合肥中铁钢结构有限公司 | Multi-point pushing system of large-span steel truss girders and pushing process thereof |
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