CN112112078A - Construction method of viaduct steel structure - Google Patents
Construction method of viaduct steel structure Download PDFInfo
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- CN112112078A CN112112078A CN202011064075.8A CN202011064075A CN112112078A CN 112112078 A CN112112078 A CN 112112078A CN 202011064075 A CN202011064075 A CN 202011064075A CN 112112078 A CN112112078 A CN 112112078A
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- modified epoxy
- epoxy asphalt
- asphalt
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/182—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect solely for depositing
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method of a steel structure of a viaduct, wherein the steel structure of the viaduct comprises a main beam plate, a bearing steel frame is arranged in the middle of the bottom of the main beam plate, two groups of parallel supporting steel frames are respectively arranged at two sides of the bearing steel frame at the bottom of the main beam plate, each supporting steel frame comprises a bottom steel beam, inclined steel beams are respectively arranged at two ends of the top of each bottom steel beam, a top supporting plate is arranged between the tops of the two groups of inclined steel beams, a plurality of clamping seats are arranged at the top of each top supporting plate, a plurality of group of butt-joint seats are arranged at the bottom of the main beam plate, a welding beam is arranged on the central line of the bottom of the main beam plate, a plurality of groups of supporting beams are arranged at two sides of the welding beam; the invention improves the connection firmness between the main beam plate and the support steel frame, effectively shares the stress of the main beam plate and prolongs the service life of the whole steel structure.
Description
Technical Field
The invention relates to the field of bridges, in particular to a viaduct steel structure.
Background
The main heart bone of overpass is regarded as to the overpass steel construction, and its main part composition as whole overpass structure forms the indispensable structure of overpass, adopts the overpass that the steel construction formed, and efficiency of construction is fast, the efficiency of construction of effectual improvement overpass, nevertheless has the problem:
1. the existing viaduct steel structure main beam plate and the bottom structure are basically welded, so that the firmness degree is general, and the stability is not outstanding enough;
2. the bottom structure of the main beam plate of the existing viaduct steel structure is simple, the bearing capacity is limited, and pressure sharing cannot be carried out between the bottom joints, so that the pressure-resistant effect of the whole viaduct steel structure is general.
In order to solve the above problems, the present invention provides an elevated bridge steel structure.
Disclosure of Invention
The invention aims to provide a viaduct steel structure, and mainly aims to solve the following problems:
1. the existing viaduct steel structure main beam plate and the bottom structure are basically welded, so that the firmness degree is general, and the stability is not outstanding enough;
2. the bottom structure of the main beam plate of the existing viaduct steel structure is simple, the bearing capacity is limited, and pressure sharing cannot be carried out between the bottom joints, so that the pressure-resistant effect of the whole viaduct steel structure is general.
The purpose of the invention can be realized by the following technical scheme:
a viaduct steel structure comprises a main beam plate, wherein a bearing steel frame is arranged in the middle of the bottom of the main beam plate, and two groups of parallel supporting steel frames are respectively arranged on two sides of the bottom of the main beam plate close to the bearing steel frame;
the supporting steel frame comprises a bottom steel beam, inclined steel beams are mounted on the top of the bottom steel beam close to two ends, a top supporting plate is mounted between the tops of the two groups of inclined steel beams, and a plurality of groups of clamping seats are mounted on the top of the top supporting plate;
the bottom of the main beam plate is provided with a plurality of group butt-joint seats, the central line of the bottom of the main beam plate is provided with a welded beam, and two sides of the welded beam are provided with a plurality of groups of supporting beams;
the inner side of the bearing steel frame is provided with a plurality of parallel reinforcing steel rods, a connecting crossbeam is arranged between the inner sides of the plurality of reinforcing steel rods, the bottom and the bottom of the connecting crossbeam are respectively connected with connecting vertical beams between the two ends of the inner part of the bearing steel frame, the outer side of each reinforcing steel rod is sleeved with a sleeving ring by the bottom, a fixing hole is formed in the outer part of each sleeving ring, and pin rods are arranged on the two sides of the sleeving ring;
the viaduct sequentially comprises a steel structure bridge, an epoxy asphalt carbon fiber protective layer, an epoxy asphalt macadam shear layer, an epoxy asphalt concrete layer, a modified epoxy waterproof reinforcing layer and a modified epoxy macadam micro-surfacing layer from bottom to top;
the epoxy asphalt carbon fiber protective layer consists of a first epoxy asphalt resin layer arranged on the bridge surface of the steel structure bridge and a carbon fiber cloth layer bonded on the first epoxy asphalt resin layer;
the epoxy asphalt macadam shear layer consists of a second epoxy asphalt resin layer arranged on the carbon fiber cloth layer and a macadam shear layer paved on the second epoxy asphalt resin layer;
the epoxy asphalt concrete layer is formed by solidifying a mixture which is arranged on the epoxy asphalt macadam shear layer and consists of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber;
the modified epoxy waterproof reinforcing layer consists of a first modified epoxy resin layer arranged on the epoxy asphalt concrete layer and a grid anti-cracking cloth layer adhered on the first modified epoxy resin layer;
the modified epoxy macadam micro-surfacing layer consists of a second modified epoxy resin layer arranged on the modified epoxy waterproof reinforcing layer and a macadam micro-surfacing layer paved on the second modified epoxy resin layer;
the construction method of the viaduct structure comprises the following steps:
the method comprises the following steps: performing shot blasting cleaning and rust removing treatment on the bridge deck of the steel structure bridge, so that the cleanliness reaches Sa2.5 grade, and the roughness reaches 60-100 um;
step two: laying epoxy asphalt resin on the bridge surface of the cleaned steel structure bridge, wherein the laying amount is 0.4-0.6 kg per square meter, so as to form a first epoxy asphalt resin layer, and simultaneously fully sticking 3K200g carbon fiber cloth on the first epoxy asphalt resin layer for reinforcement, so as to form an epoxy asphalt carbon fiber protective layer;
step three: before the epoxy asphalt carbon fiber protective layer is uncured, epoxy asphalt resin is paved on the surface of the epoxy asphalt carbon fiber protective layer, the paving amount is 1.2-1.5 kg/square meter, a second epoxy asphalt resin layer is formed, meanwhile, crushed stone with the particle size of 4-6 mm is spread on the second epoxy asphalt resin layer, the crushed stone accounts for 20-30% of the surface area of the second epoxy asphalt resin layer, and an epoxy asphalt crushed stone shear layer is formed after curing;
step four: paving a mixture on the epoxy asphalt macadam shear layer to form an epoxy asphalt concrete layer;
step five: performing shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer, removing dust, paving modified epoxy resin with the paving amount of 0.4-0.6 kg per square meter to form a first modified epoxy resin layer, and attaching grid anti-cracking cloth on the first modified epoxy resin layer to form a modified epoxy waterproof reinforcing layer;
step six: laying modified epoxy resin as a cementing material on the modified epoxy waterproof reinforcing layer, wherein the laying amount is 0.8-1.2 kg/square meter to form a second modified epoxy resin layer, spreading crushed stone with the particle size of 4-6 mm on the second modified epoxy resin layer to form a modified epoxy crushed stone micro-surfacing layer, and finishing the construction of the viaduct steel structure after the modified epoxy crushed stone micro-surfacing layer is cured.
As a further scheme of the invention, the length of the top of the main beam plate is smaller than that of the top of the main beam plate, and the top of the main beam plate is provided with a plurality of groups of strip-shaped grooves.
As a further scheme of the invention, the clamping seat and the butt joint seat are both arranged in a cylinder shape, the top of the clamping seat is provided with four groups of cross grooves and four circular grooves, and the four positions of the cross grooves are respectively arranged on the four groups of circular grooves.
As a further scheme of the invention, the bottom of the butt joint seat is connected with a cross bar and four steel cylinders, the four steel cylinders are respectively matched with the four groups of circular grooves, and the cross bar is clamped with the cross groove.
As a further scheme of the invention, the opposite ends of the two groups of inclined steel beams are connected with a cross beam, and two parallel vertical beams are connected between the bottom of the cross beam and the top of the bottom steel beam.
As a further scheme of the invention, the bearing steel frame is arranged in a rectangular frame shape, and the top of the bearing steel frame is welded and fixed with the bottom of the main beam plate.
As a further scheme of the invention: the epoxy asphalt resin, the mixed material and the modified epoxy resin are paved by bridge deck paving construction equipment, wherein the bridge deck paving construction equipment comprises an asphalt paving mechanism and an asphalt flat pressing mechanism, and the asphalt flat pressing mechanism is installed at the bottom of the asphalt paving mechanism;
wherein the asphalt laying mechanism comprises a mounting rack, a feeding pipe, an outer shell, a discharging hopper, supporting frames, a rotary drum, a driving motor, a track, a spindle-shaped tank body, a conveying shearing blade and an auxiliary roller, rotating wheels are arranged on two sides of the bottom of the mounting rack through rotating shafts, two supporting frames are arranged on the top of the mounting rack, the rotary drum is rotatably arranged on the tops of the two supporting frames, the outer shell is arranged right above the rotary drum, a shielding cover is arranged at one end of the outer shell, a triangular support is arranged on the top of one end of the mounting rack, a limiting support is arranged on one side of the supporting frame far away from the triangular support, a supporting base is arranged in an inner cavity of the limiting support, the bottom end of the outer shell is connected with the limiting support and the top ends of the two supporting frames, two sides of the bottom of, the discharge hopper is positioned right below the shielding cover;
the asphalt flat pressing mechanism comprises a balance weight balance block, a supporting rod, a lifting cylinder, a flat pressing roller and a reinforcing rod, wherein the supporting rod is installed at two ends of one side face of the balance weight balance block, the supporting rod is far away from the space between one end of the balance weight balance block and is rotatably installed with the flat pressing roller, the supporting rod is installed between the supporting rods, the reinforcing rod is installed between the supporting rods, the supporting rod top is installed with the lifting cylinder, and the lifting cylinder is installed at the top of the supporting rod and is provided with the lifting cylinder.
As a further scheme of the invention: the utility model discloses a rotary drum, including installing frame, pivot, spindle-shaped jar body, shear blade, universal driving shaft, linkage shaft, mounting bracket, installation base, install the auxiliary roller through the pivot on the installation base, two auxiliary rollers respectively with track bottom both sides roll connection, the track cup joints on the spindle-shaped jar body, the spindle-shaped jar body is installed in the inner chamber of a rotatory section of thick bamboo, install a plurality of on the internal wall of spindle-shaped jar and carry the shear blade, spindle-shaped jar body one end is provided with the bin outlet, the bin outlet is located out between hopper and the shield cover, a feeding section of thick bamboo is installed to the spindle-shaped jar body other end, a plurality of feed inlet has been seted up on the feeding section of thick bamboo outer wall, a feeding section of thick bamboo is kept away.
As a further scheme of the invention: the feeding tube is movably sleeved on the feeding cylinder, the bottom end of the feeding tube is fixedly installed on one of the supporting frames, the top end of the feeding tube penetrates through the outer shell, the stirring motor is installed on one side of the feeding tube, a shunting stirring wheel is installed on an output shaft of the stirring motor, and the shunting stirring wheel is located in an inner cavity of the feeding tube.
As a further scheme of the invention: the paving process of the bridge deck paving construction equipment is as follows:
the method comprises the following steps: the bridge deck paving construction equipment is hung on the carrier through the mounting frame, and the hanging angle of the mounting frame can be adjusted through the air cylinder on the carrier;
step two: starting a driving motor, wherein the driving motor runs to drive the spindle-shaped tank body to rotate through the linkage shaft and the feeding cylinder, and a stirring motor is started to run to drive a shunting stirring wheel to rotate;
step three: conveying the epoxy asphalt resin or the mixture or the modified epoxy resin into a feeding pipe through a conveying pump, and after the epoxy asphalt resin or the mixture or the modified epoxy resin is shunted by a shunting and stirring wheel, entering a feeding cylinder through a feeding hole and further falling into a spindle-shaped tank body;
step four: the rotating spindle-shaped tank body continuously shears the epoxy asphalt resin or the mixture or the modified epoxy resin by conveying the shearing blades;
step five: moving the bridge deck paving construction equipment to the bridge deck of the steel structure bridge through a carrier, adjusting the hanging angle of the mounting frame through a cylinder, outputting the epoxy asphalt resin or the mixture or the modified epoxy resin from a discharge port through a conveying shearing blade to form a fusiform tank body, and dropping the epoxy asphalt resin or the mixture or the modified epoxy resin onto the bridge deck of the steel structure bridge through a discharge hopper;
step six: and starting the lifting cylinder, wherein the lifting cylinder extends to drive the supporting rod to descend, so that the height of the flat pressing roller is driven to descend, and the epoxy asphalt resin or the mixture or the modified epoxy resin is tiled on the bridge deck of the steel structure bridge.
The invention has the beneficial effects that:
according to the invention, the clamping seats are matched with the butt-joint seats, the top supporting plates at the tops of two groups of inclined steel beams are in butt joint with the bottoms of the main beam plates, a plurality of groups of clamping seats correspond to the butt-joint seats one by one, cross bars and steel cylinders at the bottoms of the butt-joint seats are respectively clamped with cross grooves and circular grooves at the tops of the clamping seats, and the welding beams and the supporting beams are positioned in gaps among the plurality of clamping seats and are welded and fixed with the tops of the top supporting plates, so that the main beam plates and the top supporting plates are convenient to install, and a clamping and re-welding mode is adopted, so that the installation firmness and stability of the main beam plates are improved;
through setting up the bottom of bearing steelframe at the girder board, at first set up the multiunit in the bearing steelframe and consolidate the steel pole and combine to connect crossbeam and many to connect the perpendicular roof beam and improve and support intensity, can connect the down tube card simultaneously on each supports the steelframe and go into each and consolidate the fixed orifices that the steel pole outlying cup jointed the ring outside and offered, and adopt the pin rod chucking fixed, thereby can utilize and consolidate the steel pole and share the pressure that girder board both ends received, and then improve the bearing capacity of whole overpass steel construction, improve the life of whole steel construction, make the compressive capacity of whole steel construction stronger.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a side view of the overpass steel structure of the present invention;
FIG. 2 is a structural view of the bottom steel beam of the present invention;
FIG. 3 is a bottom view of the main beam panel of the present invention;
fig. 4 is a front view of the load-bearing steel frame of the present invention.
FIG. 5 is a schematic representation of a deck structure according to the present invention;
FIG. 6 is a schematic structural view of an epoxy pitch carbon fiber armor layer according to the present invention;
FIG. 7 is a schematic structural view of the shear bed of epoxy asphalt macadam of the present invention;
FIG. 8 is a schematic structural view of a modified epoxy waterproof reinforcing layer according to the present invention;
FIG. 9 is a schematic structural view of a modified epoxy macadam micro-surfacing layer according to the present invention;
FIG. 10 is a schematic structural view of a deck pavement construction apparatus according to the present invention;
FIG. 11 is a schematic view of the construction of the asphalt paving mechanism of the present invention;
FIG. 12 is a schematic view showing the internal structure of the outer case of the present invention;
FIG. 13 is a schematic view showing the internal structure of a side view of a rotary cylinder in the present invention;
FIG. 14 is a view showing the connection of the stirring motor and the divided stirring wheel in the present invention;
FIG. 15 is a schematic view showing an internal structure of a rotary cylinder according to the present invention;
FIG. 16 is a schematic view showing the internal structure of a fusiform tank in accordance with the present invention;
FIG. 17 is an enlarged schematic view taken at A in FIG. 12 of the present invention;
FIG. 18 is a schematic structural view of an asphalt flattening mechanism according to the present invention;
FIG. 19 is a view showing the connection of the weight balance, the support rod, and the platen roller according to the present invention;
in the figure: 1. a main beam panel; 2. a load-bearing steel frame; 3. supporting the steel frame; 4. a bottom steel beam; 5. an oblique steel beam; 6. a top bracing plate; 7. a clamping seat; 8. a docking station; 9. welding a beam; 10. supporting a beam; 11. reinforcing the steel rod; 12. connecting the cross beam; 13. connecting the vertical beams; 14. a sleeving connection ring; 15. a fixing hole; 16. a pin rod; 17. a steel structural bridge; 18. an epoxy asphalt carbon fiber protective layer; 19. an epoxy asphalt macadam shear layer; 20. an epoxy asphalt concrete layer; 21. a modified epoxy waterproof reinforcing layer; 22. a modified epoxy macadam micro-surfacing layer; 181. a first epoxy asphalt resin layer; 182. a carbon fiber cloth layer; 191. a second epoxy asphalt resin layer; 192. a gravel shear layer; 211. a first modified epoxy resin layer; 212. a grid anti-cracking cloth layer; 221. a second modified epoxy resin layer; 222. a macadam micro-surfacing layer; 300. an asphalt laying mechanism; 400. an asphalt flat pressing mechanism; 301. a mounting frame; 302. a feed tube; 303. an outer housing; 304. a shield cover; 305. a discharge hopper; 306. a triangular bracket; 307. a support frame; 308. a rotating wheel; 309. a rotary drum; 310. a support base; 311. a limiting bracket; 312. a drive motor; 313. a track; 314. a stirring motor; 315. a feeding cylinder; 316. a linkage shaft; 317. a flow dividing and stirring wheel; 318. a fusiform tank body; 319. a feed inlet; 320. conveying the cut leaves; 321. a discharge outlet; 322. installing a base; 323. an auxiliary roller; 401. a counterweight balance block; 402. a support bar; 403. a lifting cylinder; 404. a flat pressing roll; 405. and a reinforcing rod.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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 fig. 1-4, a viaduct steel structure comprises a main beam plate 1, wherein a bearing steel frame 2 is installed in the middle of the bottom of the main beam plate 1, two parallel groups of supporting steel frames 3 are respectively installed at two sides of the bottom of the main beam plate 1 close to the bearing steel frame 2, and the main beam plate 1 is supported by combining the supporting steel frames 3 with the bearing steel frame 2;
the supporting steel frame 3 comprises a bottom steel beam 4, inclined steel beams 5 are mounted at the top of the bottom steel beam 4 close to two ends, a top supporting plate 6 is mounted between the tops of the two groups of inclined steel beams 5, and a plurality of groups of clamping seats 7 are mounted at the top of the top supporting plate 6;
the bottom of the main beam plate 1 is provided with a plurality of groups of butt-joint seats 8, the central line of the bottom of the main beam plate 1 is provided with a welding beam 9, two sides of the welding beam 9 are provided with a plurality of groups of supporting beams 10, and the butt-joint seats 8 are connected with the clamping seats 7;
the inboard of bearing steelframe 2 is provided with the reinforcement steel pole 11 of a plurality of parallels, run through and be provided with between the inboard of a plurality of reinforcement steel poles 11 and connect crossbeam 12, the bottom of connecting crossbeam 12 and the bottom all are connected with between the inside both ends of bearing steelframe 2 respectively and are connected perpendicular roof beam 13, the outside of reinforcing steel pole 11 has cup jointed the grafting ring 14 by the bottom, and the outside of grafting ring 14 is seted up fixed orifices 15, the both sides that run through the grafting ring 14 all are provided with pin 16.
The top length of girder slab 1 is less than its top length, and a plurality of groups bar groove have been seted up at the top of girder slab 1, sets up the bar groove and is convenient for the later stage and pour.
The clamping seat 7 and the butt joint seat 8 are both arranged in a cylinder shape, the top of the clamping seat 7 is provided with four groups of cross grooves and four circular grooves, and the four positions of the cross grooves are respectively arranged.
The bottom of the butt joint seat 8 is connected with a cross bar and four steel cylinders, the four steel cylinders are respectively matched with the four groups of circular grooves, and the cross bar is clamped with the cross groove.
The relative one end of two sets of oblique girder steels 5 is connected with the crossbeam, is connected with two parallel perpendicular roof beams between the bottom of crossbeam and the top of end girder steel 4, sets up perpendicular roof beam and consolidates the crossbeam.
The bearing steel frame 2 is arranged in a rectangular frame shape, and the top of the bearing steel frame 2 is welded and fixed with the bottom of the main beam plate 1.
When the invention is used, firstly, a main beam plate 1 is fixed with a bearing steel frame 2 and a supporting steel frame 3, a top supporting plate 6 at the top of two groups of inclined steel beams 5 is butted with the bottom of the main beam plate 1, a plurality of groups of clamping seats 7 are in one-to-one correspondence with the butting seats 8, cross bars and steel cylinders at the bottom of the butting seats 8 are respectively clamped with cross grooves and circular grooves at the top of the clamping seats 7, a welding beam 9 and a supporting beam 10 are positioned in a gap between the clamping seats 7 and are welded and fixed with the top of the top supporting plate 6, four groups of supporting steel frames 3 are all arranged at the bottom of the main beam plate 1, the bearing steel frame 2 is arranged at the bottom of the main beam plate 1, a plurality of groups of reinforcing steel rods 11 are firstly arranged in the bearing steel frame 2 to be combined with connecting cross beams 12 and a plurality of connecting vertical beams 13 to improve the supporting strength, and meanwhile, the connecting inclined rods on each supporting steel frame 3 can be clamped into fixing holes 15, and the pin rods 16 are adopted for clamping and fixing, so that the pressure on two ends of the main beam plate 1 can be shared by the reinforcing steel rods 11, the bearing capacity of the whole viaduct steel structure is improved, and the service life of the whole steel structure is prolonged.
According to the invention, the clamping seats 7 are matched with the butt-joint seats 8, the top supporting plates 6 at the tops of two groups of inclined steel beams 5 are butted with the bottoms of the main beam plates 1, the clamping seats 7 correspond to the butt-joint seats 8 one by one, cross bars and steel cylinders at the bottoms of the butt-joint seats 8 are respectively clamped with cross grooves and circular grooves at the tops of the clamping seats 7, and the welding beams 9 and the supporting beams 10 are positioned in gaps among the clamping seats 7 and are welded and fixed with the tops of the top supporting plates 6, so that the main beam plates 1 and the top supporting plates 6 are conveniently installed, and a clamping and re-welding mode is adopted, so that the installation firmness and stability of the main beam plates 1 are improved; through setting up the bottom of bearing steelframe 2 at girder board 1, at first set up multiunit reinforcement steel pole 11 combination connection crossbeam 12 and many in the bearing steelframe 2 and connect perpendicular roof beam 13 and improve support intensity, can connect the down tube card simultaneously on each support steelframe 3 and go into each and consolidate in the fixed orifices 15 that 11 outlying cup joint the ring 14 outsides of steel pole was seted up, and adopt 16 chucking of pin rod to fix, thereby can utilize reinforcement steel pole 11 to share the pressure that girder board 1 both ends received, and then improve the bearing capacity of whole overpass steel construction, improve the life of whole steel construction, make the compressive capacity of whole steel construction stronger.
As shown in fig. 5-9, the deck of the viaduct bridge of the present invention sequentially comprises, from bottom to top, a steel structure bridge 17, an epoxy asphalt carbon fiber protective layer 18, an epoxy asphalt macadam shear layer 19, an epoxy asphalt concrete layer 20, a modified epoxy waterproof reinforcing layer 21, and a modified epoxy macadam micro-surfacing layer 22;
the epoxy asphalt carbon fiber protective layer 18 is composed of a first epoxy asphalt resin layer 181 arranged on the bridge deck of the steel structure bridge 17 and a carbon fiber cloth layer 182 bonded on the first epoxy asphalt resin layer 181;
the epoxy asphalt macadam shear layer 19 is composed of a second epoxy asphalt resin layer 191 arranged on the carbon fiber cloth layer 182 and a macadam shear layer 192 laid on the second epoxy asphalt resin layer 191;
the epoxy asphalt concrete layer 20 is formed by solidifying a mixture which is arranged on the epoxy asphalt macadam shear layer 19 and consists of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber;
the modified epoxy waterproof reinforcing layer 21 is composed of a first modified epoxy resin layer 211 arranged on the epoxy asphalt concrete layer 20 and a grid anti-cracking cloth layer 212 adhered on the first modified epoxy resin layer 211;
the modified epoxy macadam micro-surfacing layer 22 consists of a second modified epoxy resin layer 221 arranged on the modified epoxy waterproof reinforcing layer 21 and a macadam micro-surfacing layer 222 paved on the second modified epoxy resin layer 221;
the construction method of the viaduct steel structure comprises the following steps:
the method comprises the following steps: performing shot blasting cleaning and rust removing treatment on the bridge deck of the steel structure bridge 17 to ensure that the cleanliness reaches Sa2.5 grade and the roughness reaches 60-100 um;
step two: paving epoxy asphalt resin on the bridge surface of the cleaned steel structure bridge 17, wherein the paving amount is 0.4-0.6 kg per square meter, so as to form a first epoxy asphalt resin layer 181, and meanwhile, sticking 3K200g carbon fiber cloth on the first epoxy asphalt resin layer 181 for reinforcement, so as to form an epoxy asphalt carbon fiber protective layer 18;
step three: before the epoxy asphalt carbon fiber protective layer 18 is not cured, epoxy asphalt resin is laid on the surface of the epoxy asphalt carbon fiber protective layer, the laying amount is 1.2-1.5 kg/square meter, a second epoxy asphalt resin layer 191 is formed, meanwhile, crushed stone with the particle size of 4-6 mm is spread on the second epoxy asphalt resin layer 191, the crushed stone accounts for 20-30% of the surface area of the second epoxy asphalt resin layer 191, and an epoxy asphalt crushed stone shear layer 19 is formed after curing;
step four: laying a mixture on the epoxy asphalt macadam shear layer 19 to form an epoxy asphalt concrete layer 20;
step five: performing shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer 20, removing dust, paving modified epoxy resin with the paving amount of 0.4-0.6 kg per square meter to form a first modified epoxy resin layer 211, and attaching grid anti-cracking cloth on the first modified epoxy resin layer 211 to form a modified epoxy waterproof reinforcing layer 21;
step six: laying modified epoxy resin as a cementing material on the modified epoxy waterproof reinforcing layer 21 in an amount of 0.8-1.2 kg per square meter to form a second modified epoxy resin layer 221, spreading crushed stone with the particle size of 4-6 mm on the second modified epoxy resin layer 221 to form a modified epoxy crushed stone micro-surfacing layer 22, and after the layer is cured, completing the construction of the viaduct steel structure.
As shown in fig. 10-19, the epoxy asphalt resin, the mixed material and the modified epoxy resin are paved by using a bridge deck paving construction device, wherein the bridge deck paving construction device comprises an asphalt paving mechanism 300 and an asphalt flat pressing mechanism 400, and the asphalt flat pressing mechanism 400 is installed at the bottom of the asphalt paving mechanism 300;
wherein, the asphalt paving mechanism 300 comprises a mounting frame 301, a feeding pipe 302, an outer shell 303, a discharging hopper 305, supporting frames 307, a rotary cylinder 309, a driving motor 312, a track 313, a fusiform tank 318, a conveying shearing blade 320 and an auxiliary roller 323, wherein two sides of the bottom of the mounting frame 301 are respectively provided with a rotating wheel 308 through a rotating shaft, the top of the mounting frame 301 is provided with two supporting frames 307, the top of the two supporting frames 307 is rotatably provided with the rotary cylinder 309, the outer shell 303 is arranged right above the rotary cylinder 309, one end of the outer shell 303 is provided with a shielding cover 304, the top of one end of the mounting frame 301 is provided with a triangular bracket 306, one side of the supporting frame 307 far away from the triangular bracket 306 is provided with a limiting bracket 311, the inner cavity of the limiting bracket 311 is provided with a supporting base 310, the bottom end of the, two sides of the bottom of the shielding cover 304 are respectively connected to the top ends of two sides of a triangular bracket 306, a discharge hopper 305 is installed in the middle of the top of the triangular bracket 306, and the discharge hopper 305 is located right below the shielding cover 304;
the two sides of the top of the mounting frame 301 are both provided with mounting bases 322, the mounting bases 322 are provided with auxiliary rollers 323 through rotating shafts, the two auxiliary rollers 323 are respectively connected with the two sides of the bottom of the track 313 in a rolling way, the track 313 is sleeved on the fusiform tank 318, the fusiform tank 318 is arranged in the inner cavity of the rotary cylinder 309, a plurality of conveying shearing blades 320 are arranged on the inner wall of the fusiform tank body 318, one end of the fusiform tank body 318 is provided with a discharge port 321, the discharge port 321 is located between the discharge hopper 305 and the shielding cover 304, the other end of the fusiform tank 318 is provided with a feed cylinder 315, a plurality of feed inlets 319 are arranged on the outer wall of the feed cylinder 315, a linkage shaft 316 is arranged at one end of the feed cylinder 315 far away from the fusiform tank body 318, one end of the linkage shaft 316, which is far away from the feeding cylinder 315, is connected to an output shaft of a driving motor 312, and the driving motor 312 is installed at the top of the supporting base 310;
a feed pipe 302 is movably sleeved on the feed cylinder 315, the bottom end of the feed pipe 302 is fixedly mounted on one of the support frames 307, the top end of the feed pipe 302 penetrates through the outer shell 303, a stirring motor 314 is mounted on one side of the feed pipe 302, a shunting stirring wheel 317 is mounted on an output shaft of the stirring motor 314, and the shunting stirring wheel 317 is positioned in an inner cavity of the feed pipe 302;
wherein, pitch concora crush mechanism 400 includes counter weight balancing piece 401, bracing piece 402, lift cylinder 403, concora crush roller 404, anchor strut 405, bracing piece 402, two are all installed at the both ends of 401 side of counter weight balancing piece the bracing piece 402 is kept away from to rotate between 401 one end of counter weight balancing piece and is installed concora crush roller 404, two install a plurality of anchor strut 405, two between the bracing piece 402 a plurality of lift cylinder 403, a plurality of are installed at bracing piece 402 top the bottom at mounting bracket 301 is all installed at the top of lift cylinder 403.
The laying process of the bridge deck laying construction equipment is as follows:
the method comprises the following steps: the bridge deck paving construction equipment is hung on a carrier through a mounting rack 301, and the hanging angle of the mounting rack 301 can be adjusted through an air cylinder on the carrier;
step two: starting a driving motor 312, wherein the driving motor 312 drives a spindle-shaped tank body 318 to rotate through a linkage shaft 316 and a feeding cylinder 315 in a running mode, starting a stirring motor 314 to run, and the stirring motor 314 drives a shunting stirring wheel 317 to rotate;
step three: conveying the epoxy asphalt resin or the mixture or the modified epoxy resin into the feeding pipe 302 through a conveying pump, shunting the epoxy asphalt resin or the mixture or the modified epoxy resin by a shunting stirring wheel 317, and then entering a feeding cylinder 315 through a feeding hole 319 to fall into a spindle-shaped tank body 318;
step four: the rotating spindle-shaped tank 318 continuously shears the epoxy asphalt resin or the mixture or the modified epoxy resin through the conveying shearing blade 320;
step five: moving the bridge deck paving construction equipment to the bridge deck of the steel structure bridge 17 through a carrier, adjusting the hanging angle of the mounting rack 301 through a cylinder, outputting the epoxy asphalt resin or the mixture or the modified epoxy resin from the discharge port 321 to the spindle-shaped tank body 318 through the conveying shearing blade 320, and dropping the epoxy asphalt resin or the mixture or the modified epoxy resin onto the bridge deck of the steel structure bridge 17 through the discharge hopper 105;
step six: and starting the lifting cylinder 403, wherein the lifting cylinder 403 extends to drive the support rod 402 to descend, so that the height of the flat pressing roller 404 is driven to descend, and the epoxy asphalt resin or the mixture or the modified epoxy resin is paved on the bridge surface of the steel structure bridge 17.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The construction method of the steel structure of the viaduct is characterized in that the steel structure of the viaduct comprises a main beam plate (1), a bearing steel frame (2) is installed in the middle of the bottom of the main beam plate (1), and two groups of parallel supporting steel frames (3) are respectively installed on two sides, close to the bearing steel frame (2), of the bottom of the main beam plate (1);
the supporting steel frame (3) comprises a bottom steel beam (4), inclined steel beams (5) are mounted on the top of the bottom steel beam (4) close to two ends, a top supporting plate (6) is mounted between the tops of the two groups of inclined steel beams (5), and a plurality of clamping seats (7) are mounted on the top of the top supporting plate (6);
the bottom of the main beam plate (1) is provided with a plurality of groups of butt-joint seats (8), the center line of the bottom of the main beam plate (1) is provided with a welding beam (9), and two sides of the welding beam (9) are provided with a plurality of groups of supporting beams (10);
a plurality of parallel reinforcing steel rods (11) are arranged on the inner side of the bearing steel frame (2), a connecting cross beam (12) is arranged between the inner sides penetrating through the reinforcing steel rods (11), connecting vertical beams (13) are respectively connected between the bottom of the connecting cross beam (12) and the two ends of the inner part of the bearing steel frame (2), a sleeving ring (14) is sleeved on the outer side of each reinforcing steel rod (11) close to the bottom, a fixing hole (15) is formed in the outer part of each sleeving ring (14), and pin rods (16) are arranged on the two sides penetrating through the sleeving rings (14);
the viaduct bridge deck sequentially comprises a steel structure bridge (17), an epoxy asphalt carbon fiber protective layer (18), an epoxy asphalt macadam shear layer (19), an epoxy asphalt concrete layer (20), a modified epoxy waterproof reinforcing layer (21) and a modified epoxy macadam micro-surfacing layer (22) from bottom to top;
the epoxy asphalt carbon fiber protective layer (18) is composed of a first epoxy asphalt resin layer (181) arranged on the bridge surface of the steel structure bridge (17) and a carbon fiber cloth layer (182) bonded on the first epoxy asphalt resin layer (181);
the epoxy asphalt macadam shear layer (19) is composed of a second epoxy asphalt resin layer (191) arranged on the carbon fiber cloth layer (182) and a macadam shear layer (192) laid on the second epoxy asphalt resin layer (191);
the epoxy asphalt concrete layer (20) is formed by solidifying a mixture consisting of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber and arranged on the epoxy asphalt macadam shear layer (19);
the modified epoxy waterproof reinforced layer (21) is composed of a first modified epoxy resin layer (211) arranged on the epoxy asphalt concrete layer (20) and a grid anti-cracking cloth layer (212) adhered on the first modified epoxy resin layer (211);
the modified epoxy macadam micro-surfacing layer (22) consists of a second modified epoxy resin layer (221) arranged on the modified epoxy waterproof reinforcing layer (21) and a macadam micro-surfacing layer (222) paved on the second modified epoxy resin layer (221);
the construction method of the viaduct steel structure comprises the following steps:
the method comprises the following steps: performing shot blasting cleaning and rust removing treatment on the bridge deck of the steel structure bridge (17), so that the cleanliness reaches Sa2.5 level and the roughness reaches 60-100 um;
step two: paving epoxy asphalt resin on the bridge surface of the cleaned steel structure bridge (17), wherein the paving amount is 0.4-0.6 kg per square meter, forming a first epoxy asphalt resin layer (181), and simultaneously adhering 3K200g carbon fiber cloth on the first epoxy asphalt resin layer (181) for reinforcement to form an epoxy asphalt carbon fiber protective layer (18);
step three: before the epoxy asphalt carbon fiber protective layer (18) is not cured, epoxy asphalt resin is paved on the surface of the epoxy asphalt carbon fiber protective layer, the paving amount is 1.2-1.5 kg/square meter, a second epoxy asphalt resin layer (191) is formed, meanwhile, broken stone with the particle size of 4-6 mm is spread on the second epoxy asphalt resin layer (191), the broken stone accounts for 20-30% of the surface area of the second epoxy asphalt resin layer (191), and an epoxy asphalt broken stone shear layer (19) is formed after curing;
step four: laying a mixture on the epoxy asphalt macadam shear layer (19) to form an epoxy asphalt concrete layer (20);
step five: performing shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer (20), removing dust, paving modified epoxy resin with the paving amount of 0.4-0.6 kg per square meter to form a first modified epoxy resin layer (211), and attaching grid anti-cracking cloth on the first modified epoxy resin layer (211) to form a modified epoxy waterproof reinforcing layer (21);
step six: laying modified epoxy resin as a cementing material on the modified epoxy waterproof reinforcing layer (21), wherein the laying amount is 0.8-1.2 kg per square meter to form a second modified epoxy resin layer (221), spreading crushed stone with the particle size of 4-6 mm on the second modified epoxy resin layer (221) to form a modified epoxy crushed stone micro-surfacing layer (22), and after the modified epoxy crushed stone micro-surfacing layer is cured, completing the construction of the viaduct steel structure.
2. The construction method of the viaduct steel structure according to claim 1, wherein the length of the top of the main beam plate (1) is less than the length of the top of the main beam plate, and the top of the main beam plate (1) is provided with a plurality of groups of strip-shaped grooves.
3. The construction method of the viaduct steel structure according to claim 1, wherein the clamping seats (7) and the docking seats (8) are arranged in a cylinder shape, and the top of the clamping seats (7) is provided with four groups of cross grooves and four groups of circular grooves, wherein the four groups of circular grooves are respectively provided with four sides of the cross grooves.
4. The construction method of the viaduct steel structure according to claim 3, wherein the bottom of the butt joint seat (8) is connected with a cross bar and four steel cylinders, the four steel cylinders are respectively matched with the four groups of circular grooves, and the cross bar is clamped with the cross groove.
5. The construction method of the viaduct steel structure according to claim 1, wherein the opposite ends of the two sets of oblique steel beams (5) are connected with a cross beam, and two parallel vertical beams are connected between the bottom of the cross beam and the top of the bottom steel beam (4).
6. The construction method of the viaduct steel structure according to claim 1, wherein the bearing steel frame (2) is arranged in a rectangular frame shape, and the top of the bearing steel frame (2) is welded and fixed with the bottom of the main beam plate (1).
7. The construction method for the viaduct steel structure according to claim 1, wherein the epoxy asphalt resin, the mixed epoxy resin and the modified epoxy resin are paved by bridge deck paving construction equipment, the bridge deck paving construction equipment comprises an asphalt paving mechanism (300) and an asphalt flattening mechanism (400), and the asphalt flattening mechanism (400) is installed at the bottom of the asphalt paving mechanism (300);
wherein, the asphalt paving mechanism (300) comprises a mounting rack (301), a feeding pipe (302), an outer shell (303), a discharging hopper (305), a support frame (307), a rotating cylinder (309), a driving motor (312), a track (313), a spindle-shaped tank body (318), conveying shearing blades (320) and auxiliary rollers (323), rotating wheels (308) are installed on two sides of the bottom of the mounting rack (301) through rotating shafts, two support frames (307) are installed on the top of the mounting rack (301), the rotating cylinder (309) is installed on the top of the two support frames (307), the outer shell (303) is arranged right above the rotating cylinder (309), a shielding cover (304) is installed at one end of the outer shell (303), a triangular support (306) is installed at the top of one end of the mounting rack (301), and a limiting support (311) is installed on one side of the support frame (307) far away from, a supporting base (310) is installed in an inner cavity of the limiting support (311), the bottom end of the outer shell (303) is connected with the limiting support (311) and the top ends of the two supporting frames (307), two sides of the bottom of the shielding cover (304) are respectively connected to the top ends of two sides of the triangular support (306), a discharging hopper (305) is installed in the middle of the top of the triangular support (306), and the discharging hopper (305) is located right below the shielding cover (304);
wherein, pitch concora crush mechanism (400) is including counter weight balancing piece (401), bracing piece (402), lift cylinder (403), concora crush roller (404), anchor strut (405), bracing piece (402) are all installed, two at both ends of counter weight balancing piece (401) side bracing piece (402) are kept away from to rotate between counter weight balancing piece (401) one end and are installed concora crush roller (404), two install a plurality of anchor strut (405) between bracing piece (402), two a plurality of lift cylinder (403), a plurality of are installed at bracing piece (402) top the bottom at mounting bracket (301) is all installed at the top of lift cylinder (403).
8. The construction method of the viaduct steel structure according to claim 7, wherein the installation bases (322) are installed on both sides of the top of the installation frame (301), the installation bases (322) are installed with auxiliary rollers (323) through rotating shafts, the two auxiliary rollers (323) are respectively connected with both sides of the bottom of the rail (313) in a rolling manner, the rail (313) is sleeved on the fusiform tank body (318), the fusiform tank body (318) is installed in the inner cavity of the rotating cylinder (309), the inner wall of the fusiform tank body (318) is installed with a plurality of conveying shear blades (320), one end of the fusiform tank body (318) is provided with a discharge port (321), the discharge port (321) is located between the discharge hopper (305) and the shielding cover (304), the other end of the fusiform tank body (318) is installed with a feeding cylinder (315), the outer wall of the feeding cylinder (315) is provided with a plurality of feeding ports (319), one end, far away from the fusiform tank body (318), of the feeding barrel (315) is provided with a linkage shaft (316), one end, far away from the feeding barrel (315), of the linkage shaft (316) is connected to an output shaft of a driving motor (312), and the driving motor (312) is installed at the top of the supporting base (310).
9. The viaduct steel structure construction method according to claim 8, wherein a feeding pipe (302) is movably sleeved on the feeding cylinder (315), the bottom end of the feeding pipe (302) is fixedly installed on one of the supporting frames (307), the top end of the feeding pipe (302) penetrates through the outer shell (303), a stirring motor (314) is installed on one side of the feeding pipe (302), a shunting stirring wheel (317) is installed on an output shaft of the stirring motor (314), and the shunting stirring wheel (317) is located in an inner cavity of the feeding pipe (302).
10. The construction method of the overpass steel structure according to claim 7, wherein the construction equipment for paving the bridge deck is laid as follows:
the method comprises the following steps: the bridge deck paving construction equipment is hung on a carrier through a mounting rack (301), and the hanging angle of the mounting rack (301) can be adjusted through an air cylinder on the carrier;
step two: starting a driving motor (312), wherein the driving motor (312) runs to drive a spindle-shaped tank body (318) to rotate through a linkage shaft (316) and a feeding cylinder (315), starting a stirring motor (314) to run, and the stirring motor (314) drives a shunting stirring wheel (317) to rotate;
step three: conveying the epoxy asphalt resin or the mixture or the modified epoxy resin into a feeding pipe (302) through a conveying pump, shunting the epoxy asphalt resin or the mixture or the modified epoxy resin by a shunting stirring wheel (317), and then entering a feeding cylinder (315) through a feeding hole (319) so as to fall into a spindle-shaped tank body (318);
step four: the rotating spindle-shaped tank body (318) continuously shears the epoxy asphalt resin or the mixture or the modified epoxy resin through the conveying shearing blade (320);
step five: moving the bridge deck paving construction equipment to the bridge deck of the steel structure bridge (17) through a carrier, adjusting the hanging angle of the mounting rack (301) through a cylinder, outputting epoxy asphalt resin or mixture or modified epoxy resin from a discharge port (321) through a conveying shearing blade (320) to form a fusiform tank body (318), and dropping the epoxy asphalt resin or mixture or modified epoxy resin onto the bridge deck of the steel structure bridge (17) through a discharge hopper (305);
step six: and starting the lifting cylinder (403), wherein the lifting cylinder (403) extends to drive the supporting rod (402) to descend, so that the height of the flat pressing roller (404) is reduced, and the epoxy asphalt resin or the mixture or the modified epoxy resin is tiled on the bridge deck of the steel structure bridge (17).
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| CN202011064075.8A CN112112078A (en) | 2020-09-30 | 2020-09-30 | Construction method of viaduct steel structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112663505A (en) * | 2020-12-22 | 2021-04-16 | 上海绿地建设(集团)有限公司 | Construction method of main bridge steel structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112663505A (en) * | 2020-12-22 | 2021-04-16 | 上海绿地建设(集团)有限公司 | Construction method of main bridge steel structure |
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