CN211772865U - Device for adjusting transverse pre-camber of steel box girder - Google Patents
Device for adjusting transverse pre-camber of steel box girder Download PDFInfo
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- CN211772865U CN211772865U CN201922145630.9U CN201922145630U CN211772865U CN 211772865 U CN211772865 U CN 211772865U CN 201922145630 U CN201922145630 U CN 201922145630U CN 211772865 U CN211772865 U CN 211772865U
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Abstract
The invention relates to the technical field of steel box girders, in particular to a device for adjusting the transverse pre-camber of a steel box girder, which comprises an upper chord, a lower cross bar, a short diagonal, a long diagonal, a ring chain electric hoist and an adjusting block, wherein the device can be regarded as a truss formed by adding a rod piece on a basic triangular frame, a constructor can select the outer surface gradient of an adjusting plate according to the pre-camber of the steel box girder required by a design drawing, the device is made of Q345 steel, the rod piece is an open-web round rod, the structure is light, the performance of the material is fully exerted, the investment cost of people, materials and machines is greatly reduced, and the economic benefit is obvious. The device also meets the requirement of quickly and accurately adjusting the transverse pre-camber of the steel box girders with different shapes, ensures the strength of welding seams among the individual units of the steel box girders, and is greatly helpful for the safe operation of bridge structures.
Description
Technical Field
The invention relates to the technical field of steel box girders, in particular to a device for adjusting the transverse pre-camber of a steel box girder.
Background
The steel box girder is a structural style commonly used by large-span bridges at present, is generally formed by connecting a top plate, a bottom plate, a web plate, a transverse clapboard, a longitudinal clapboard, a stiffening rib and the like in a full-welding mode, and has the advantages of high strength, light structure, high industrial production degree, easiness in repair, recoverability and the like, so that the steel box girder is applied more and more widely.
When a large-span continuous steel box girder is constructed, because the section of the steel box girder is large and the transverse and longitudinal lengths are large, the construction method of manufacturing, assembling on site and welding on site of a factory sectional framing unit module is generally adopted, and before the assembling and welding of the individual units of the steel box girder, the transverse pre-camber of the steel box girder can be ensured only by accurately positioning the plane and the elevation. Meanwhile, the assembling and welding process is also easily interfered by factors such as external environment, the dislocation between each unit of the assembled and welded steel box girder is caused, the thickness of the welding seam between adjacent unit is seriously insufficient, and the normal operation of the whole steel box girder bridge is finally influenced.
Chinese patents with application publication number CN110172925A and application publication number 2019, 8.27 disclose a simple device for adjusting the height of a steel box girder or a steel box cornice and an installation method, the simple device comprises two sets of jacks, two long I-shaped steels, two short I-shaped steels and a crane, the crane lifts the steel box girder with the elevation to be adjusted to be tightly attached to the fixed steel box girder, the elevation is lower than the fixed steel box girder, and each long I-shaped steel and one short I-shaped steel are welded into an L-shaped I-shaped steel; the long I-shaped steel ends of the two L-shaped I-shaped steels are respectively welded on the steel box girder to be adjusted in elevation, the two sets of jacks are respectively placed on the fixed steel box girder, and each set of jack is positioned below the short I-shaped steel of the L-shaped I-shaped steel. The method has simple processing procedure, realizes the purpose of adjusting and controlling the splicing elevation of the steel box girder or the steel box cornice by jacking the steel box girder or the steel box cornice through the jack, has simple and convenient field construction operation, safety and reliability, can be used repeatedly, greatly reduces the cost investment of people, materials and machines, saves the cost, and is easy to adjust the elevation position when the steel box girder or the steel box cornice is spliced. However, the device can only roughly adjust the elevation position during splicing of the steel box girder or the steel box cornice, cannot quickly and accurately adjust the transverse pre-camber of the steel box girder, and cannot meet the construction requirement of the high-precision steel box girder.
Disclosure of Invention
The invention aims to provide a device for adjusting the transverse pre-camber of a steel box girder aiming at the problems in the prior art, the device can accurately position the transverse bridge deck to ensure the transverse pre-camber of the bridge deck, ensure the accurate welding of each unit body for splicing and welding, is not easily interfered by factors such as external environment and the like, and is simple and convenient to operate.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a device for adjusting the transverse pre-camber of a steel box girder comprises an upper chord, a lower cross bar, a short inclined bar, a long inclined bar, a ring chain electric hoist and an adjusting block, wherein the device can be regarded as a truss formed by adding a rod piece on a basic triangular frame. The upper chord is positioned at the top end of the basic triangular frame, the lower chords are positioned at the two bottom ends of the basic triangular frame, the lower cross rod is horizontally placed and welded with the two lower chords, the short oblique rods and the lower cross rod form a basic triangle, one end of each short oblique rod is welded at the welding position of the lower cross rod and the lower chord, the other end of each short oblique rod is welded with the upper chord, one end of each long oblique rod is welded at the welding position of the lower cross rod and the lower chord, and the other end of each long oblique rod is welded at the welding position of the upper chord and the adjacent short oblique rods.
Specifically, the diameters of the upper chord and the lower chord are 0.2m, the diameters of the lower cross rod, the short diagonal rod and the long diagonal rod are 0.1m, and the wall thickness of each rod piece is 3 cm. The rod pieces are all hollow round rods, the material is Q345 steel, the lower cross rods are respectively arranged at the positions 0.3m away from the two ends of the lower chord along the rod length direction of the lower chord, and the lower cross rods in the middle are arranged at intervals of 1m along the rod length direction of the lower chord.
Specifically, the distance between two lower chords is 1m, the distance between the lower chords and the upper chords is 1m, and the rod pieces are symmetrically arranged along the length direction of the upper chords.
Specifically, the upper chord vertically hangs the electric chain hoist with the tonnage of 20t, and the electric chain hoist has the advantages of advanced performance structure, small size, light weight, reliable performance, convenient operation and wide application range, and is favorable for adjusting the transverse pre-camber of the steel box girder. The distance between every two electric chain hoists along the length direction of the upper chord is 0.8m, and the lifting lugs are arranged at the corresponding positions of the upper surface of the steel box girder, so that the pre-camber of the steel box girder can be adjusted conveniently.
Specifically, the adjusting block includes rectangular plate, adjusting plate and right angle board, and the material adopts Q345 steel, and the size of rectangular plate is 0.5 mx 0.5m, and thickness is 5cm, and center round hole diameter is 21 cm.
Specifically, the adjusting plate includes an adjusting plate, No. two adjusting plates, No. three adjusting plates and No. four adjusting plates, and the size is 0.4m, and thickness is 4cm, and No. one adjusting plate, No. two adjusting plates, No. three adjusting plates and No. four adjusting plates surface central line department weld with the rectangular plate to respectively weld two right angle boards in every welding position middle part both sides, the size is 0.1m, and thickness is 3cm, totally eight right angle boards.
The welding surface of adjusting plate is the plane, and the surface is the inclined plane of taking certain slope, an adjusting plate surface slope is 0%, No. two adjusting plate surface slopes are 1%, No. three adjusting plate surface slopes are 2%, No. four adjusting plate surface slopes are 5%, and constructor can be according to the horizontal surface slope of selecting the adjusting plate of camber in advance of steel box girder that design drawing required.
The steel box girder is formed by welding a first body unit of the steel box girder, a second body unit of the steel box girder and a third body unit of the steel box girder.
The invention has the beneficial effects that: the device of the horizontal pre-camber of adjustment steel box girder includes chord member, lower chord member, sheer pole, short down tube, long down tube, ring chain electric block and adjusting block, the device material is the Q345 steel, and the member is open-web round bar, and the structure is slim and graceful, the performance of full play material, people, material, machine input cost reduce greatly, and economic benefits is obvious. The device also meets the requirement of quickly and accurately adjusting the transverse pre-camber of the steel box girders with different shapes, ensures the flatness of joints among all unit bodies of the steel box girders in the welding process, and is greatly helpful for the safe operation of bridge structures. The beneficial effects can make certain contribution to the technical field of the steel box girder and obtain better economic benefit and social benefit.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic front view of the structure of FIG. 1;
FIG. 3 is a schematic front view of the adjusting block;
FIG. 4 is a schematic cross-sectional view of an adjustment plate;
in the figure:
1. the steel box girder comprises a steel box girder, 2 parts of an upper chord, 3 parts of a lower chord, 4 parts of a lower cross bar, 5 parts of a short diagonal bar, 6 parts of a long diagonal bar, 7 parts of a chain electric hoist, 8 parts of an adjusting block, 9 parts of a lifting lug, 10 parts of a rectangular plate, 11 parts of a first adjusting plate, 12 parts of a second adjusting plate, 13 parts of a third adjusting plate, 14 parts of a fourth adjusting plate, 15 parts of a right-angle plate, 16 parts of a first steel box girder body unit, 17 parts of a second steel box girder body unit and 18 parts of a third steel box girder body unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
Fig. 1-4 show a schematic structural diagram of an apparatus for adjusting the transverse pre-camber of a steel box girder according to an exemplary embodiment of the present invention, which includes an upper chord 2, a lower chord 3, a lower cross bar 4, a short diagonal bar 5, a long diagonal bar 6, a chain hoist 7 and an adjusting block 8. The upper chord 2 of the device is horizontally arranged at the top end of the basic triangular frame, the lower chord 3 is horizontally arranged at the two bottom ends of the basic triangular frame, the lengths of the rod pieces of the upper chord 2 and the lower chord 3 are correspondingly prefabricated according to the transverse width of the steel box girder 1, under the general condition, the length of the rod pieces of the upper chord 2 and the lower chord 3 is 4m longer than the transverse width of the steel box girder 1, the exposed length of the two ends of the upper chord 2 and the lower chord 3 is 2m, the lower cross rod 4 is perpendicularly welded with the two lower chords 3, the short inclined rods 5 and the lower cross rod 4 form a basic triangle, one ends of the short inclined rods 5 are welded at the positions where the lower cross rod 4 and the lower chords 3 are welded, the other ends of the short inclined rods 5 are welded with the upper chords 2, one ends of the long inclined rods 6 are welded at the positions where the lower cross rod 4 and the lower chords 3 are welded, and the other ends of the long inclined rods 6 are welded with the positions where the upper chords 2 and the adjacent short inclined rods 5 are welded.
The diameters of the upper chord 2 and the lower chord 3 are 0.2m, the diameters of the lower cross rod 4, the short oblique rods 5 and the long oblique rods 6 are 0.1m, and the wall thickness of each rod piece is 3 cm. The member be the hollow round bar, the material adopts Q345 steel, the interval between two lower chords 3 is 1m, the distance between lower chord 3 and upper chord 2 is 1m, lower horizontal pole 4 respectively arranges one along the pole length direction of lower chord 3 apart from lower chord 3 both ends 0.3m department, the lower horizontal pole 4 in middle part arranges one along the pole length direction of lower chord 3 at every interval 1 m. The rod pieces are symmetrically arranged along the length direction of the upper chord 2.
Pre-camber, which is a correction value opposite to the displacement direction and reserved in construction or manufacture for offsetting the deflection of the steel box girder 1 under the action of load, the transverse pre-camber of the steel box girder 1 is the highest point generally at the midpoint of the transverse width direction of the steel box girder 1, and the two ends of the transverse width direction of the steel box girder 1 are zero and are distributed according to a straight line.
The upper chord 2 vertically hangs the ring chain electric hoist 7 with the tonnage of 20t, the ring chain electric hoist 7 has advanced performance structure, small volume, light weight, reliable performance, convenient operation and wide application range, and is beneficial to adjusting the transverse pre-camber of the steel box girder 1. The distance between every two electric chain hoists 7 along the length direction of the upper chord 2 is 0.8m, and the lifting lugs 9 are arranged at the corresponding positions of the upper surface of the steel box girder 1 so as to adjust the pre-camber of the steel box girder 1.
Specifically, the adjusting block 8 comprises a rectangular plate 10, an adjusting plate and a right-angle plate 15, the material is Q345 steel, the size of the rectangular plate 10 is 0.5m multiplied by 0.5m, the thickness is 5cm, and the diameter of a central circular hole is 21 cm.
Specifically, the adjusting plate includes No. one adjusting plate 11, No. two adjusting plates 12, No. three adjusting plates 13 and No. four adjusting plates 14, and the size is 0.4m x 0.4m, and thickness is 4cm, and No. one adjusting plate 11, No. two adjusting plates 12, No. three adjusting plates 13 and No. four adjusting plates 14 surface center line department and rectangular plate 10 weld to respectively weld two right angle boards 15 in every welding position middle part both sides, and the size is 0.1m x 0.1m, and thickness is 3cm, totally eight right angle boards 15.
Specifically, the welding surface of adjusting plate is the plane, and the surface is the inclined plane of taking certain slope, 11 surface slopes of adjusting plate are 0%, 12 surface slopes of adjusting plate are 1%, 13 surface slopes of adjusting plate are 2%, 14 surface slopes of adjusting plate are 5%, and constructor can select the surface slope of adjusting plate according to the 1 horizontal pre-camber of steel box girder that design drawing required.
The steel box girder 1 is formed by welding a first steel box girder body unit 16, a second steel box girder body unit 17 and a third steel box girder body unit 18.
The working principle of the invention is as follows:
s1, a constructor hoists a first steel box girder body unit 16, a second steel box girder body unit 17 and a third steel box girder body unit 18 to a specified height, and the device is in place at the specified height;
s2, a constructor rotates the adjusting block 8 and selects an adjusting plate with a required gradient to enable the outer surface of the adjusting plate to face downwards;
s3, a constructor uses a chain electric hoist 7 to hang the lifting lugs 9 of the first body unit 16, the second body unit 17 and the third body unit 18 of the steel box girder, and the upper surfaces of the first body unit 16, the second body unit 17 and the third body unit 18 of the steel box girder are adjusted to be in close contact with the lower surface of an adjusting plate with a required gradient;
s4, welding the spliced parts of the first body unit 16 of the steel box girder, the second body unit 17 of the steel box girder and the third body unit 18 of the steel box girder by constructors;
s5, repeating S1-S4 to adjust the transverse pre-camber of the subsequent section of the steel box girder 1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The device for adjusting the transverse pre-camber of the steel box girder is characterized by comprising an upper chord (2), a lower chord (3), a lower cross bar (4), short diagonal rods (5), long diagonal rods (6) and adjusting blocks (8), wherein the device can be regarded as a truss formed by adding rod pieces on a basic triangular frame, the upper chord (2) of the device is horizontally positioned at the top end of the basic triangular frame, and the two lower chord (3) are horizontally positioned at the two bottom ends of the basic triangular frame; the two lower chords (3) are fixedly connected through the lower cross rod (4), and the lower cross rod (4) is perpendicular to the lower chords (3); the lower chord (3) is fixedly connected with the upper chord (2) through a short inclined rod (5), and the short inclined rod (5) is vertical to the lower chord (3) and the upper chord (2); two ends of the long inclined rod (6) are respectively connected with the connecting positions of the lower cross rod (4) and the lower chord (3) and the upper chord (2) and the short inclined rod (5);
a ring chain electric hoist (7) is hung on the upper chord (2);
the lower chord (3) is provided with an adjusting block (8), and the adjusting block (8) comprises a rectangular plate (10), an adjusting plate and a right-angle plate (15); the rectangular plate (10) and the adjusting plate form a certain included angle for adjusting the angle of the steel box girder body unit.
2. The device for adjusting the transverse pre-camber of the steel box girder according to claim 1, wherein the length of the upper chord (2) and the lower chord (3) is 4m longer than the transverse width of the steel box girder (1), and the exposed length of the two ends of the upper chord (2) and the lower chord (3) is 2m each.
3. The device for adjusting the transverse pre-camber of the steel box girder according to claim 1, wherein the diameters of the upper chord (2) and the lower chord (3) are 0.2m, the diameters of the lower cross bar (4), the short diagonal bar (5) and the long diagonal bar (6) are 0.1m, and the wall thicknesses of the bars are all 3 cm; the rod pieces are all hollow round rods and are made of Q345 steel; the distance between the two lower chords (3) is 1m, the distance between the lower chords (3) and the upper chords (2) is 1m, the lower cross rods (4) are respectively arranged at the positions 0.3m away from the two ends of the lower chords (3) along the length direction of the lower chords (3), and the lower cross rods (4) in the middle are arranged at intervals of 1m along the length direction of the lower chords (3); the lower cross rod (4), the short inclined rod (5) and the long inclined rod (6) are symmetrically arranged along the rod length direction of the upper chord (2).
4. The device for adjusting the transverse pre-camber of a steel box girder according to claim 3, wherein the adjusting block is made of Q345 steel, the rectangular plate (10) has the size of 0.5m x 0.5m, the thickness of 5cm, and the diameter of the central circular hole is 21 cm.
5. The device for adjusting the transverse pre-camber of the steel box girder according to claim 4, wherein the adjusting plates comprise a first adjusting plate (11), a second adjusting plate (12), a third adjusting plate (13) and a fourth adjusting plate (14), the sizes of the first adjusting plate, the second adjusting plate, the third adjusting plate and the fourth adjusting plate are all 0.4m by 0.4m, and the thickness of the fourth adjusting plate is 4 cm; a first adjusting plate (11), a second adjusting plate (12), a third adjusting plate (13) and a fourth adjusting plate (14) are welded with a rectangular plate (10) at the surface center line, two right-angle plates (15) are respectively welded at the two sides of the middle part of each welding position, the size is 0.1m multiplied by 0.1m, the thickness is 3cm, and the total number of the eight right-angle plates (15) is eight.
6. The device for adjusting the transverse pre-camber of the steel box girder according to claim 5, wherein the welding surface of the adjusting plate is a plane, the outer surface of the adjusting plate is an inclined surface with a certain gradient, the outer surface gradient of the first adjusting plate (11) is 0%, the outer surface gradient of the second adjusting plate (12) is 1%, the outer surface gradient of the third adjusting plate (13) is 2%, the outer surface gradient of the fourth adjusting plate (14) is 5%, and the outer surface gradient of the adjusting plate is selected according to the transverse pre-camber of the steel box girder (1) required by design drawings.
7. The device for adjusting the transverse pre-camber of the steel box girder according to claim 1, wherein the upper chord (2) is vertically suspended with a 20t tonnage chain hoist (7), and the distance between every two chain hoists (7) along the length direction of the upper chord (2) is 0.8 m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922145630.9U CN211772865U (en) | 2019-12-04 | 2019-12-04 | Device for adjusting transverse pre-camber of steel box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922145630.9U CN211772865U (en) | 2019-12-04 | 2019-12-04 | Device for adjusting transverse pre-camber of steel box girder |
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| CN211772865U true CN211772865U (en) | 2020-10-27 |
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| CN201922145630.9U Active CN211772865U (en) | 2019-12-04 | 2019-12-04 | Device for adjusting transverse pre-camber of steel box girder |
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