CN112359701A - Steel box girder - Google Patents
Steel box girder Download PDFInfo
- Publication number
- CN112359701A CN112359701A CN202011204069.8A CN202011204069A CN112359701A CN 112359701 A CN112359701 A CN 112359701A CN 202011204069 A CN202011204069 A CN 202011204069A CN 112359701 A CN112359701 A CN 112359701A
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- girder
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- steel box
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 107
- 239000010959 steel Substances 0.000 title claims abstract description 107
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000002955 isolation Methods 0.000 claims 1
- 230000002349 favourable effect Effects 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 230000001965 increasing effect Effects 0.000 description 6
- 238000010008 shearing Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
Abstract
The invention relates to a steel box girder which comprises a girder bottom splice plate (1), a girder web splice plate (2), a central partition plate (3) and a girder top splice plate (4), wherein a plurality of L-shaped stiffening ribs (5) are longitudinally distributed on the girder web splice plate (2), a plurality of U-shaped stiffening ribs (6) are longitudinally distributed on the girder bottom splice plate, the girder web splice plate extends upwards to exceed the girder top splice plate and is fixedly connected with the bottom of a shear connector, one side of the shear connector (7) positioned in a girder section is supported by an inner wall side plate (9), the inner wall side plate is fixedly connected on the girder bottom splice plate, an inner wall bottom plate (10) is arranged between the two inner wall side plates, the inner wall bottom plate (10) is positioned above the U-shaped stiffening ribs, a diagonal brace (12) is also arranged between the inner wall bottom plate (10) and the inner wall side plate, and a spring (11) is arranged between the inner wall. The invention can reduce the steel consumption, has good economical efficiency and is convenient for arching the bridge deck.
Description
Technical Field
The invention relates to a steel box girder which comprises a girder bottom splicing plate and inclined girder web splicing plates fixedly connected to two ends of the girder bottom splicing plate.
Background
Chinese utility model patent publication CN210827081U discloses a space curved surface dysmorphism steel box girder bridge section, solves the problem that prior art beam bridge face appears bulging easily, warp and the space curved surface is not smooth. The utility model comprises a horizontally distributed steel box girder bridge bottom plate, two steel box girder bridge webs vertically and transversely welded and fixed at the two ends of the top surface of the steel box girder bridge bottom plate, two steel box girder bridge two-side arc lower seal plates welded and fixed on the end surfaces of the two ends of the steel box girder bridge bottom plate, a steel box girder bridge top plate and two steel box girder bridge overhanging seal plates; the steel box girder bridge roof includes first steel box girder bridge roof and the second steel box girder bridge roof that all slope distributes. The steel consumption can not be reduced, the arching of the bridge deck is inconvenient, the beam top is easily influenced by the bridge deck, the arching and the arching cannot be freely stretched and deformed, and the rigid collision is easily caused to crack.
Disclosure of Invention
The invention aims to provide a steel box girder which can reduce the steel consumption, has good economy, is provided with a gap between a bridge deck and a girder top, is convenient for arching and supporting a formwork, and ensures that the bridge deck is not easy to crack, the girder top is not easy to be influenced by the bridge deck, the bridge deck and the girder top can freely stretch and deform, have less contact, and are not easy to cause rigid collision and cracking during simultaneous contraction or expansion.
Another object of the present invention is to provide a steel box girder bridge, which can reserve a space between girders and plates of the steel box girder bridge, facilitate arching when a bridge deck is supported, have a sufficient space between the girders and the plates to generate free deformation, reduce cracks of the bridge deck, and facilitate transmission of vibration on the bridge deck to the girders, thereby reducing vibration cracks of the bridge deck.
The steel box girder comprises a girder bottom splicing plate, inclined girder web splicing plates fixedly connected to two ends of the girder bottom splicing plate, a central clapboard fixedly connected between the girder bottom splicing plate and the two girder web splicing plates, and a girder bottom splicing plate fixedly connected to the central clapboard, the beam top splice plate on two roof beam web splice plates and the central baffle, be equipped with on the roof beam web splice plate along its longitudinal distribution's multichannel L shape stiffening rib, be equipped with on the splice plate of the bottom of the beam along its longitudinal distribution's multichannel U-shaped stiffening rib, the roof beam web splice plate upwards extends beyond roof beam splice plate, rigid coupling shear connector's bottom again, shear connector is located the inside one side of roof beam section and is supported by the inner wall curb plate, inner wall curb plate rigid coupling is on the splice plate of the bottom of the beam, be equipped with the inner wall bottom plate between two inner wall curb plates, the inner wall bottom plate is located on the U-shaped stiffening rib, still be equipped with the bracing between inner wall bottom plate and the inner wall curb plate, be provided with.
The U-shaped stiffening ribs are arranged, so that the steel consumption can be reduced without increasing the thickness of a mother plate, the welding construction difficulty of a thick plate can be avoided, the economy is good, and the equivalent thickness of the beam bottom splicing plate is good
t is the thickness of the beam bottom splicing plate, AstThe thickness of 1U-shaped stiffening rib, b the width of the beam bottom splice plate, L-shaped stiffening rib only used to enhance the buckling bearing capacity of the beam web splice plate, and not "increase" the thickness of the web, and the U-shaped stiffening rib participates in bearing the normal stress, so as to take the contribution of the normal stress into consideration, so the area of the U-shaped stiffening rib is "spread" to the width of the whole bottom plate, the beam web splice plate extends upwards to exceed the beam top splice plate, and then the bottom of the shear connector is fixedly connected, so that the space exists on the beam top splice plate to arrange a template support system, the bottom die arch camber is convenient, the bridge deck is poured, the bridge deck is prevented from being directly poured on the beam top splice plate, the downward bending deformation of the beam top splice plate is caused, the bridge deck is cracked, the bottom of the bridge deck is arranged on the shear connector, the shear connector can increase the contact area with the bridge deck, and the steel box girder is tightly connected with the, the transmission of the force is convenient, and the occurrence of shearing damage is prevented. One side of the shear connector, which is positioned in the beam section, is supported by the inner wall side plate, so that the shear connector is favorably cushioned and stabilized, and is prevented from being bent under the influence of the load of the bridge deck. The inner wall bottom plate between the two inner wall side plates can enhance the transverse direction of the inner wall side platesRigidity, preventing the inner wall side plates from extruding towards the U-shaped stiffening ribs. The inclined strut arranged between the inner wall bottom plate and the inner wall side plate can further improve the rigidity of the inner wall side plate, so that the anti-shearing connecting piece is convenient to cushion, and the deformation of the inner wall side plate is reduced. The spring arranged between the inner wall bottom plate and the U-shaped stiffening rib helps to adapt to the downward bending deformation of the inner wall side plate, helps the inner wall side plate to have certain capacity of restoring deformation, and can provide certain capacity of reducing vibration, and the compression of the spring can absorb a part of energy to enhance the stability.
As a further improvement of the steel box girder, a plurality of transverse T-shaped stiffening ribs are distributed on the plurality of U-shaped stiffening ribs at intervals, and the T-shaped stiffening ribs are fixedly connected between two girder web splicing plates.
The T-shaped stiffening ribs further enhance the integrity of the U-shaped stiffening ribs, so that the U-shaped stiffening ribs and the U-shaped stiffening ribs are integrated, and the rigidity of the bottom of the steel box girder is further enhanced.
As a further improvement of the steel box girder, the shear connector comprises a substrate fixed on a girder web splicing plate, an angle plate is arranged at the joint of the substrate and the girder web splicing plate, a cylindrical head bolt is arranged on the substrate, the top end of the cylindrical head bolt is sleeved with a nut, the bottom surface of the nut is fixedly connected with a wave-shaped steel plate, and the bottom surface of the wave-shaped steel plate is provided with a central hole which is penetrated by the cylindrical head bolt.
The base plate is the bottom surface of the waterproof layer of follow-up decking of pouring or will mating formation, its fixed height is favorable to erecting the template, improve the template precision, base plate cylinder head bolt will bury underground in subsequent decking, it is inseparabler to make shear connector be connected with the decking, prevent that decking and shear connector from taking place the slippage, the base plate has increased area of contact, be favorable to reducing shear stress, the decking that makes the position department of encorbelmenting is littleer, in order to reduce the load of the position of encorbelmenting, be favorable to the concrete of the shear connector department of being the support to prevent the fracture. Nut on the cylinder head bolt to and the wave steel sheet of nut bottom surface rigid coupling all by when being favorable to taking place the vibration, can guarantee that the vibration of bridge deck plate can transmit for shear connector, with transmission vibration to bottom steel box girder, prevent the decking fracture, its surface of buckling of wave steel sheet and bridge deck plate are in the same place, are favorable to increasing area of contact, the more loads of conduction are to the base plate on, thereby reduce the shear stress of base plate edge, be favorable to shearing, prevent the fracture, the wave steel sheet bottom surface is equipped with centre bore easy to assemble.
As a further improvement of the steel box girder, a vertical slide bar is arranged in the spring and penetrates through the U-shaped stiffening rib in a sliding manner, the spring is fixedly connected with the top end of the vertical slide bar, a roller is arranged between the sliding plate and the inner wall bottom plate, and the roller is arranged on the sliding plate.
The vertical sliding rod prevents the transverse displacement of the spring and generates slippage, and the rollers arranged between the sliding plate and the inner wall bottom plate facilitate the relative displacement between the inner wall bottom plate and the sliding plate, facilitate the free deformation or arching of the inner wall bottom plate, and facilitate the reduction of the influence generated by temperature.
As a further improvement of the steel box girder, the inner wall bottom plate is an arched plate which is arched downwards.
When the arched plate arched downwards deforms, the arched plate is not easy to arch upwards, and the inner wall bottom plate can be ensured to compress the spring all the time, so that the spring can play a role all the time.
As a further improvement of the steel box girder, a first steel plate is embedded at one side of the base plate far away from the inner part of the girder section. The two first steel plates are welded together, so that the adjacent steel box girders are connected more tightly.
As a further improvement of the steel box girder, the girder web splicing plates are also fixedly connected with end transverse partition plates, and second steel plates are embedded at one sides of the end transverse partition plates.
As a further improvement of the steel box girder, the end diaphragm plates are convenient for splicing the adjacent steel box girders, and the second steel plates enhance the splicing effect.
As a further improvement of the steel box girder, the girder top splice plate is also provided with a shockproof cushion block which can be cushioned below the bridge deck plate, preferably a rubber cushion block which can adapt to the free deformation of the bridge deck plate and has good shock absorption effect.
Aiming at the steel box girder bridge, the invention comprises main girders formed by longitudinally splicing the steel box girders; a beam body formed by transversely splicing a plurality of main beams; the sidewalk cantilever beams are positioned on two sides of the beam body; the sidewalk board is positioned on the sidewalk cantilever beam; a bridge deck located between the sidewalk boards; the bridge comprises a bridge pier positioned below a beam body and a support base stone positioned on the bridge pier; the support is positioned between the support base cushion stone and the main beam; the end diaphragm plate is positioned between the adjacent main beams; and the anti-seismic stop blocks are positioned on two sides of the beam pier.
The steel box girder bridge is characterized in that a space is reserved between the beam and the plate of the steel box girder bridge, arching is facilitated when the bridge deck plate is supported, enough space for generating free deformation is formed between the beam and the plate, cracks of the bridge deck plate can be reduced, vibration on the bridge deck plate is convenient to transmit to the beam, vibration cracking of the bridge deck plate is reduced, the support is convenient to mount on the support base stone, and the steel box girder is convenient to mount on the support.
As a further improvement of the steel box girder bridge, a second steel plate is embedded at one side adjacent to the diaphragm plates at the two ends, and a shockproof cushion block is arranged between the bridge deck and the beam top splicing plate. The second steel sheet is convenient for splice adjacent end cross slab together, adopts the welded mode, also can strengthen the wholeness, and the cushion that takes precautions against earthquakes can prevent that the steel box girder from slipping from the pier.
As a further improvement of the steel box girder bridge, longitudinally extending water collecting grooves are formed in the two sides of the bridge deck, the bottom of each water collecting groove is communicated with a water drainage pipeline, and the water drainage pipeline extends to a position between the bridge deck and the beam top splicing plate and then extends to the side edge of the beam body to extend out.
Still be convenient for install the drain pipe between decking and the roof beam splice plate, convenient maintenance, the rivers discharge in the water catch bowl is favorable to the bridge drainage to the drain pipe.
The method for manufacturing the steel box girder bridge comprises the steps of placing the steel box girders on a support of a pier, splicing the steel box girders into a plurality of main bridge sections along the transverse direction, continuously splicing the steel box girders on the main bridge sections on the pier until the bridge is closed, and after the bridge is closed, formwork pouring a sidewalk cantilever beam, a sidewalk plate and a bridge deck between the sidewalk plates on a beam top splicing plate.
A plurality of main bridge sections are spliced on the plurality of piers 22 along the transverse direction, integral forming is facilitated, and then the main bridge sections longitudinally extend to the bridge closure, and the main bridge sections have larger installation surfaces, are convenient to butt, and can also have wider working faces, so that construction is facilitated.
The invention is beneficial to reducing the steel consumption, has good economy, is convenient for arching and supporting the bridge deck slab due to the spacing between the bridge deck slab and the beam top, ensures that the bridge deck slab is not easy to crack, the beam top is not easy to be influenced by the bridge deck slab, the bridge deck slab and the beam top are free to stretch and deform and have less contact, and the bridge deck slab is not easy to crack due to rigid collision caused by simultaneous contraction or expansion.
Drawings
Fig. 1 is a schematic structural view of a steel box girder.
Fig. 2 is a partially enlarged structural schematic diagram of the steel box girder.
FIG. 3 is a schematic structural diagram of a corrugated steel plate.
Fig. 4 is a schematic structural view of the steel box girder bridge.
Reference numerals: 1. a beam bottom splice plate; 2. a web splice plate; 3. a central partition; 4. a beam top splice plate; 5. an L-shaped stiffener; 6. a U-shaped stiffener; 7. a shear connector; 71. a substrate; 72. a cylindrical head bolt; 73. a gusset; 74. a nut; 75. a wave-shaped steel plate; 751. a central bore; 76. a first steel plate; 8. a T-shaped stiffener; 9. an inner wall side plate; 10. an inner wall floor; 11. a spring; 12. bracing; 13. a slide bar; 14. a slide plate; 15. a roller; 16. a main beam; 17. a beam body; 18. a sidewalk cantilever beam; 19. a support base cushion stone; 20. a sidewalk board; 21. a bridge deck; 22. a bridge pier; 23. a support; 24. a transverse end diaphragm; 25. an anti-seismic stop block; 26. a second steel plate; 27. a water drainage pipe; 28. a water collection tank.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
FIGS. 1-3 show a steel box girder, which comprises a bottom splice plate 1, oblique web splice plates fixedly connected to both ends of the bottom splice plate 1, a central partition plate 3 fixedly connected between the bottom splice plate 1 and two web splice plates 2, a top splice plate 4 fixedly connected to the bottom splice plate 1, two web splice plates 2 and the central partition plate 3, a plurality of L-shaped stiffening ribs 5 longitudinally distributed along the web splice plate 2, a plurality of U-shaped stiffening ribs 6 longitudinally distributed along the web splice plate 1, the web splice plate 2 extending upward beyond the top splice plate 4, and a bottom part fixedly connected to a shear connector 7, wherein one side of the shear connector 7 located inside a beam section is supported by an inner wall side plate 9, the inner wall side plate 9 is fixedly connected to the bottom splice plate 1, an inner wall bottom plate 10 is arranged between the two inner wall side plates 9, the inner wall bottom plate 10 is located above the U-shaped stiffening ribs 6, an inclined strut 12 is further arranged between the inner wall bottom plate 10 and the inner wall side plate 9, and a spring 11 is arranged between the inner wall bottom plate 10 and the U-shaped stiffening rib 6.
Due to the U-shaped stiffening ribs, the steel consumption can be reduced without increasing the thickness of the mother plate, the welding construction difficulty of the thick plate can be avoided, the economy is good, and the equivalent thickness of the beam bottom splicing plate 1 is good
t is the thickness of the beam bottom splice plate 1, Ast is the thickness of 1U-shaped stiffening rib 6, b is the width of the beam bottom splice plate 1, L-shaped stiffening rib 5 is only used for enhancing the buckling bearing capacity of the beam web splice plate 2 and does not increase the thickness of the web, and the U-shaped stiffening rib participates in bearing normal stress, so as to consider the contribution, so the area of the U-shaped stiffening rib is spread to the width of the whole bottom plate, the beam web splice plate 2 extends upwards to exceed the beam top splice plate 4, and then the bottom of the shear connector 7 is fixedly connected, so that a space exists on the beam top splice plate 4 to set a template support system, the bottom die is convenient to arch, the bridge deck is poured, the bridge deck is prevented from being directly poured on the beam top splice plate 4, the beam top splice plate 4 is bent and deformed downwards, so as to cause the crack of the bridge deck, the bottom of the bridge deck is arranged on the shear connector 7, the shear connector 7 can increase the contact area with the bridge deck, and the steel box girder and the bridge deck are connected tightly, so that the force is conveniently conducted, and the shearing damage is prevented. One side of the shear connector 7, which is positioned in the beam section, is supported by the inner wall side plate 9, so that the shear connector 7 is favorably cushioned and stabilized, and is prevented from being bent under the influence of the load of the bridge deck. The inner wall bottom plate 10 between the two inner wall side plates 9 can enhance the transverse rigidity of the inner wall side plates 9 and prevent the inner wall side plates 9 from extruding towards the U-shaped stiffening rib 6. The inclined strut 12 arranged between the inner wall bottom plate 10 and the inner wall side plate 9 can further improve the rigidity of the inner wall side plate 9, so that the shear connector 7 is convenient to cushion, and the deformation of the inner wall side plate 9 is reduced. The springs 11 arranged between the inner wall bottom plate 10 and the U-shaped stiffening ribs 6 help to adapt to the downward bending deformation of the inner wall side plates 9, help to have certain capacity of restoring deformation, and can provide certain capacity of reducing vibration, and the compression of the springs 11 can absorb a part of energy, thereby enhancing the stability.
In this embodiment, a plurality of transverse T-shaped stiffening ribs 8 are distributed on the plurality of U-shaped stiffening ribs 6 at intervals, and the T-shaped stiffening ribs 8 are fixedly connected between the two web splicing plates 2.
The T-shaped stiffening ribs 8 further enhance the integrity of the U-shaped stiffening ribs 6, so that the two form a whole, and further enhance the rigidity of the bottom of the steel box girder.
In this embodiment, the shear connector 7 includes a base plate 71 fixed on the web splicing plate 2, an angle plate 73 is disposed at the joint of the base plate 71 and the web splicing plate 2, a cylindrical bolt 72 is disposed on the base plate 71, a nut 74 is sleeved on the top end of the cylindrical bolt 72, a wavy steel plate 75 is fixedly connected to the bottom surface of the nut 74, and a central hole 751 is disposed on the bottom surface of the wavy steel plate 75 and penetrated by the cylindrical bolt 72.
The base plate 71 is the bridge deck slab of follow-up pouring or the bottom surface of the waterproof layer that will mat formation, its fixed height is favorable to erecting the template, improve the template precision, base plate 71 cylinder head bolt 72 will bury underground in subsequent bridge deck slab, make shear connector 7 be connected more closely with the bridge deck slab, prevent that the bridge deck slab from taking place the slippage with shear connector 7, base plate 71 has increased area of contact, be favorable to reducing shear stress, make the bridge deck slab of position department of encorbelmenting littleer, with the load that reduces the position of encorbelmenting, the concrete that is favorable to the shear connector 7 department of support prevents the fracture. Nut 74 on the cylinder head bolt 72, and the wave steel sheet 75 of nut 74 bottom surface rigid coupling are all by when being favorable to taking place the vibration, can guarantee that the vibration of bridge deck plate can transmit shear connector 7 for to transmit the vibration to bottom steel box girder, prevent the decking fracture, the surface and the bridge deck plate of its buckling of wave steel sheet 75 are in the same place, be favorable to increasing area of contact, transmit more loads to base plate 71, thereby reduce the shear stress at base plate 71 edge, be favorable to shearing, prevent the fracture, wave steel sheet 75 bottom surface is equipped with centre bore 751 easy to assemble.
In the embodiment, a vertical slide rod 13 is arranged in the spring 11 and slides through the U-shaped stiffening rib 6, the top ends of the spring 11 and the vertical slide rod 13 are fixedly connected with a sliding plate 14, a roller 15 is arranged between the sliding plate 14 and the inner wall bottom plate 10, and the roller 15 is installed on the sliding plate 14.
The vertical sliding rod 13 prevents the transverse displacement of the spring 11 from slipping, and the roller 15 arranged between the sliding plate 14 and the inner wall bottom plate 10 is convenient for the inner wall bottom plate 10 and the sliding plate 14 to generate relative displacement, so that the inner wall bottom plate 10 can deform or arch freely, and the influence caused by temperature can be reduced.
In this embodiment, the inner wall bottom panel 10 is a downwardly arched panel.
When the arched plate arched downwards deforms, the arched plate is not easy to arch upwards, and the inner wall bottom plate 10 can be ensured to compress the spring 11 all the time, so that the spring 11 can play a role all the time.
In this embodiment, a first steel plate 76 is embedded in the side of the base plate 71 remote from the interior of the beam section. The two first steel plates 76 are welded together to enable the adjacent steel box girders to be connected more tightly.
As shown in fig. 4, the web splicing plate 2 is further fixedly connected with an end diaphragm 24, and a second steel plate 26 is embedded in each of the end diaphragms 24.
The end diaphragms 24 facilitate splicing of adjacent steel box girders, and the second steel plates 26 enhance the splicing effect.
The roof beam splice plate is also provided with a shockproof cushion block 28, the shockproof cushion block 28 can be cushioned below the bridge deck plate, preferably is a rubber cushion block, can adapt to the free deformation of the bridge deck plate, and has a good shock absorption effect.
Example 2
Fig. 4 shows a steel box girder bridge comprising main girders 16 formed by longitudinally splicing the steel box girders; a beam body 17 formed by transversely splicing a plurality of main beams 16; sidewalk outriggers 18 positioned at both sides of the beam body 17; a sidewalk board 20 on the sidewalk outrigger 19; a bridge deck 21 between the sidewalk boards 20; a pier 22 located below the beam body 17, and a support pad 22 located on the pier 22; a support 23 located between the support cushion 22 and the main beam 16; end diaphragms 24 between adjacent main beams 16; seismic stops 25 on either side of the beam pier 22.
The space is reserved between the beams and the plates of the steel box girder bridge, arching is convenient when the bridge deck plates are supported, enough space for generating free deformation is reserved between the beams and the plates, cracks of the bridge deck plates can be reduced, vibration on the bridge deck plates 21 is convenient to transmit to the beams, vibration cracking of the bridge deck plates 21 is reduced, the mounting supports are convenient to mount on the support cushion stones 22, and the steel box girders are convenient to mount through the supports.
In this embodiment, a second steel plate 26 is embedded in each of the two adjacent end diaphragms 24, and a cushion pad 28 is disposed between the bridge deck 21 and the roof splice plate 4. The second steel plate 26 facilitates splicing the adjacent end diaphragms 24 together, and also enhances the integrity by welding, and the seismic blocks 28 prevent the steel box girders from slipping off the piers 22.
In this embodiment, the two sides of the bridge deck 21 are provided with longitudinally extending water collecting troughs 28, the bottoms of the water collecting troughs 28 are communicated with water drainage pipes 27, and the water drainage pipes 27 extend to the space between the bridge deck 21 and the roof splicing plate 4 and then extend to the side edges of the beam body 17 to extend out.
And a drain pipe 27 is convenient to install between the bridge deck slab 21 and the beam top splice plate 4, so that the maintenance is convenient, and the drain pipe 27 discharges water in the water collecting tank 28, thereby being beneficial to bridge drainage.
Example 3
The invention also relates to a manufacturing method of the steel box girder bridge, the steel box girder is placed on a support 23 of a pier 22 and is spliced into a plurality of main bridge sections along the transverse direction, the steel box girder is continuously spliced on the main bridge sections of the pier 22 in the longitudinal direction until the bridge is closed, and after the bridge is closed, the sidewalk outriggers 19, the sidewalk plates 20 and the bridge deck 21 among the sidewalk plates 20 are cast on the beam top splicing plates 4 in a mould mode.
A plurality of main bridge sections are spliced on the plurality of piers 22 along the transverse direction, integral forming is facilitated, and then the main bridge sections longitudinally extend to the bridge closure, and the main bridge sections have larger installation surfaces, are convenient to butt, and can also have wider working faces, so that construction is facilitated.
The invention is beneficial to reducing the steel consumption, has good economy, is convenient for arching and supporting the bridge deck slab due to the spacing between the bridge deck slab and the beam top, ensures that the bridge deck slab is not easy to crack, the beam top is not easy to be influenced by the bridge deck slab, the bridge deck slab and the beam top are free to stretch and deform and have less contact, and the bridge deck slab is not easy to crack due to rigid collision caused by simultaneous contraction or expansion.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (8)
1. A steel box girder comprises a girder bottom splice plate (1), oblique girder web splice plates (2) fixedly connected at two ends of the girder bottom splice plate (1), a central partition plate (3) fixedly connected between the girder bottom splice plate (1) and two girder web splice plates (2), and a girder top splice plate (4) fixedly connected on the girder bottom splice plate (1), two girder web splice plates (2) and the central partition plate (3), wherein a plurality of L-shaped stiffening ribs (5) longitudinally distributed along the girder web splice plate (2) are arranged on the girder bottom splice plate (1), the steel box girder is characterized in that a plurality of U-shaped stiffening ribs (6) longitudinally distributed along the girder bottom splice plate (1) are arranged on the girder bottom splice plate (1), the girder web splice plate (2) upwards extends over the girder top splice plate (4), the bottom of a shear connector (7) is fixedly connected, one side of the shear connector (7) positioned inside a girder section is supported by an inner wall side plate (9), the inner wall side plates (9) are fixedly connected to the beam bottom splicing plate (1), an inner wall bottom plate (10) is arranged between the two inner wall side plates (9), the inner wall bottom plate (10) is located on the U-shaped stiffening rib (6), an inclined strut (12) is further arranged between the inner wall bottom plate (10) and the inner wall side plates (9), and a spring (11) is arranged between the inner wall bottom plate (10) and the U-shaped stiffening rib (6).
2. The steel box girder according to claim 1, wherein a plurality of transverse T-shaped stiffening ribs (8) are distributed on the plurality of U-shaped stiffening ribs (6) at intervals, and the T-shaped stiffening ribs (8) are fixedly connected between the two web splicing plates (2).
3. The steel box girder according to claim 1, wherein the shear connector (7) comprises a base plate (71) fixed on the web splice plate (2), an angle plate (73) is arranged at the joint of the base plate (71) and the web splice plate (2), a cylindrical bolt (72) is arranged on the base plate (71), a nut (74) is sleeved at the top end of the cylindrical bolt (72), a wavy steel plate (75) is fixedly connected to the bottom surface of the nut (74), and a central hole (751) is formed in the bottom surface of the wavy steel plate (75) and is penetrated by the cylindrical bolt (72).
4. The steel box girder according to claim 1, wherein vertical sliding rods (13) are arranged in the springs (11) and slide through the U-shaped stiffening ribs (6), sliding plates (14) are fixedly connected to the top ends of the springs (11) and the vertical sliding rods (13), rollers (15) are arranged between the sliding plates (14) and the inner wall bottom plate (10), and the rollers (15) are installed on the sliding plates (14).
5. The steel box girder according to claim 1, wherein the inner wall bottom plate (10) is a downwardly arched plate.
6. Steel box girder according to claim 3, wherein a first steel plate (76) is embedded in the base plate (71) on the side facing away from the interior of the girder section.
7. The steel box girder according to claim 1, wherein the web splice plates (2) are further fixedly connected with end diaphragms (24), and a second steel plate (26) is embedded in each of the side of the end diaphragms (24).
8. The steel box girder according to claim 1, wherein the girder top splice plate is further provided with a seismic isolation pad (28).
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| CN202011204069.8A CN112359701B (en) | 2020-11-02 | 2020-11-02 | Steel box girder |
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| CN202011204069.8A CN112359701B (en) | 2020-11-02 | 2020-11-02 | Steel box girder |
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Effective date of registration: 20231218 Address after: No. 646, Zhongyi 1st Road, Yuhua District, Changsha City, Hunan Province Patentee after: CHINA RAILWAY WUJU GROUP THE FIRST ENGINEERING Co.,Ltd. Patentee after: Ningxia Jiaotou Engineering Construction Management Co.,Ltd. Address before: 410000 no.646 Zhongyi 1st Road, Yuhua District, Changsha City, Hunan Province Patentee before: CHINA RAILWAY WUJU GROUP THE FIRST ENGINEERING Co.,Ltd. |