CN112112078A - Construction method of viaduct steel structure - Google Patents

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

A kind of viaduct steel structure construction method

technical field

The invention relates to the field of bridges, in particular to a viaduct steel structure.

Background technique

As the backbone of the viaduct, the steel structure of the viaduct, as the main component of the entire viaduct structure, is an indispensable structure for the formation of the viaduct. The viaduct formed by the steel structure has fast construction efficiency and effectively improves the construction efficiency of the viaduct, but there are the following problems:

1. The main beam plate of the existing viaduct steel structure and the bottom structure are basically welded, the firmness is average, 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 load-bearing capacity is relatively limited, and the pressure cannot be shared between the bottom nodes, resulting in a relatively general compressive effect of the entire viaduct steel structure.

In order to solve the above problems, the present invention provides a viaduct steel structure.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a kind of viaduct steel structure, and the main purpose of the present invention is to solve the following problems:

1. The main beam plate of the existing viaduct steel structure and the bottom structure are basically welded, the firmness is average, 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 load-bearing capacity is relatively limited, and the pressure cannot be shared between the bottom nodes, resulting in a relatively general compressive effect of the entire viaduct steel structure.

The object of the present invention can be realized through the following technical solutions:

A viaduct steel structure comprises a main girder plate, a load-bearing steel frame is installed in the middle of the bottom of the main girder plate, and two groups of parallel supporting steel frames are respectively installed on both sides of the bottom of the main girder plate against the load-bearing steel frame;

The supporting steel frame includes a bottom steel beam, and the top of the bottom steel beam is installed with inclined steel beams at both ends, and a top support plate is installed between the tops of the two groups of the inclined steel beams, and the top of the top support plate is installed There are several groups of card sockets;

The bottom of the main beam plate is provided with several groups of docking seats, and the bottom centerline of the main beam plate is provided with a welded beam, and both sides of the welded beam are provided with several groups of support beams;

The inner side of the load-bearing steel frame is provided with several parallel reinforcing steel rods, and connecting beams are arranged between the inner sides of the several reinforcing steel rods. A connecting vertical beam is connected between them, a sleeve ring is sleeved on the outer side of the reinforcing steel rod at the bottom, and the outer part of the sleeve ring is provided with a fixing hole, and both sides of the sleeve ring are provided with pin rods;

From bottom to top, the viaduct includes steel structure bridge, epoxy asphalt carbon fiber protective layer, epoxy asphalt crushed stone shear layer, epoxy asphalt concrete layer, modified epoxy waterproof reinforcement layer and modified epoxy crushed stone micro-surface treatment layer. ;

The epoxy pitch carbon fiber protective layer is composed of a first epoxy pitch resin layer arranged on the steel structure bridge deck and a carbon fiber cloth layer bonded to the first epoxy pitch resin layer;

The epoxy asphalt crushed stone shear layer is composed of a second epoxy asphalt resin layer arranged on the carbon fiber cloth layer and a crushed stone shear layer laid on the second epoxy asphalt resin layer;

The epoxy asphalt concrete layer is formed by the solidification of a mixture consisting of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber, which is arranged on the epoxy asphalt crushed stone shear layer;

The modified epoxy waterproof reinforcement layer is composed of a first modified epoxy resin layer arranged on the epoxy asphalt concrete layer and a mesh anti-cracking cloth layer bonded to the first modified epoxy resin layer. constitute;

The modified epoxy crushed stone micro-surface treatment layer is composed of a second modified epoxy resin layer arranged on the modified epoxy waterproof reinforcement layer and a crushed stone micro-surface layer laid on the second modified epoxy resin layer. The composition of the processing layer;

The construction method of the viaduct structure includes the following steps:

Step 1: Carry out shot blasting cleaning and rust removal on the steel structure bridge deck, so that the cleanliness can reach Sa2.5 level and the roughness can reach 60-100um;

Step 2: Lay epoxy asphalt resin on the cleaned steel structure bridge deck with a laying amount of 0.4-0.6kg/m2 to form a first epoxy asphalt resin layer, and at the same time fully stick on the first epoxy asphalt resin layer 3K200g carbon fiber cloth is reinforced to form epoxy pitch carbon fiber protective layer;

Step 3: Before the epoxy asphalt carbon fiber protective layer is cured, lay epoxy asphalt resin on its surface, and the laying amount is 1.2-1.5kg/㎡ to form a second epoxy asphalt resin layer. Crushed stone with a particle size of 4 to 6 mm is sprinkled on the layer, and the crushed stone accounts for 20 to 30% of the surface area of the second epoxy asphalt resin layer, and the epoxy asphalt gravel shear layer is formed after curing;

Step 4: Lay the mixture on the epoxy asphalt crushed stone shear layer to form an epoxy asphalt concrete layer;

Step 5: Carry out shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer, remove dust, and lay the modified epoxy resin with a laying amount of 0.4-0.6 kg/m2 to form the first modified epoxy resin layer. The first modified epoxy resin layer is pasted with a mesh anti-cracking cloth to form a modified epoxy waterproof reinforcement layer;

Step 6: Lay the modified epoxy resin as a cementing material on the modified epoxy waterproof reinforcement layer, and the laying amount is 0.8-1.2 kg/m2 to form a second modified epoxy resin layer. The resin layer is sprinkled with crushed stones with a particle size of 4-6 mm to form a modified epoxy crushed stone micro-surface treatment layer, and after it is cured, the construction of the viaduct steel structure is completed.

As a further solution of the present invention, the length of the top of the main beam plate is smaller than the length of the top, and the top of the main beam plate is provided with several groups of strip grooves.

As a further solution of the present invention, the clamping seat and the docking seat are both arranged in the form of cylinders, and the top of the clamping seat is provided with a cross groove and a circular groove. Four-sided location.

As a further solution of the present invention, the bottom of the docking seat is connected with cross bars and four steel cylinders, the four steel cylinders are respectively fitted with four sets of circular grooves, and the cross bars and the cross grooves are clamped.

As a further solution of the present invention, the opposite ends of the two sets of inclined steel beams are connected with cross beams, 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 solution of the present invention, the load-bearing steel frame is arranged in a rectangular frame shape, and the top of the load-bearing steel frame is welded and fixed to the bottom of the main beam plate.

As a further scheme of the present invention: the laying epoxy asphalt resin, laying mixture and laying modified epoxy resin are all laid by bridge deck laying construction equipment, and the bridge deck laying construction equipment includes an asphalt laying mechanism and an asphalt flat pressing mechanism, An asphalt flat pressing mechanism is installed at the bottom of the asphalt laying mechanism;

Wherein, the asphalt laying mechanism includes an installation frame, a feeding pipe, an outer casing, a discharge hopper, a support frame, a rotating drum, a driving motor, a track, a spindle-shaped tank body, a conveying and shearing blade, and an auxiliary roller. The bottom of the installation frame is two A rotating wheel is installed on the side through the rotating shaft, two support frames are installed on the top of the mounting frame, and a rotating cylinder is rotatably installed on the top of the two supporting frames. A shielding cover is installed, a triangular bracket is installed on the top of one end of the installation frame, a limit bracket is installed on the side of the support frame away from the triangular bracket, a support base is installed in the inner cavity of the limit bracket, and the bottom end of the outer shell is installed It is connected with the limit bracket and the tops of the two support brackets, the bottom sides of the shielding cover are respectively connected to the tops on both sides of the triangular bracket, and the middle position of the top of the triangular bracket is installed with a discharge hopper, and the discharge hopper is located at the bottom of the shielding cover. Directly below;

Wherein, the asphalt flat pressing mechanism includes a counterweight balance block, a support rod, a lifting cylinder, a flat pressing roller, and a reinforcement rod. Both ends of one side of the counterweight balance block are installed with support rods, and two of the support rods are installed. A flat pressing roller is rotatably installed between one end away from the counterweight balance block, a number of reinforcement rods are installed between the two support rods, a number of lifting cylinders are installed on the top of the two support rods, and a number of the lifting cylinders are installed are mounted on the bottom of the mounting bracket.

As a further solution of the present invention: a mounting base is installed on both sides of the top of the mounting frame, an auxiliary roller is installed on the mounting base through a rotating shaft, and the two auxiliary rollers are respectively connected to the two sides of the bottom of the track in a rolling connection, and the track is sleeved. On the spindle-shaped tank, the spindle-shaped tank is installed in the inner cavity of the rotating cylinder, a number of conveying and shearing blades are installed on the inner wall of the spindle-shaped tank, and one end of the spindle-shaped tank is provided with a discharge material The discharge port is located between the discharge hopper and the shielding cover, the other end of the spindle-shaped tank is installed with a feeding cylinder, and a number of feeding ports are opened on the outer wall of the feeding cylinder. A linkage shaft is installed at one end away from the spindle-shaped tank body, and the end of the linkage shaft away from the feed cylinder is connected to the output shaft of the drive motor, and the drive motor is installed on the top of the support base.

As a further solution of the present invention: a feeding tube is movably sleeved on the feeding cylinder, the bottom end of the feeding tube is fixedly installed on one of the support frames, the top of the feeding tube penetrates the outer shell, and one side of the feeding tube is A stirring motor is installed on the top, and a splitting stirring wheel is installed on the output shaft of the stirring motor, and the splitting stirring wheel is located in the inner cavity of the feeding pipe.

As a further scheme of the present invention: the laying process of the bridge deck laying construction equipment is as follows:

Step 1: The bridge deck laying construction equipment is hung on the carrier through the installation frame, and the hanging angle of the installation frame can be adjusted through the air cylinder on the carrier;

Step 2: start the drive motor, the drive motor rotates through the linkage shaft and the feeding barrel to drive the spindle-shaped tank to rotate, start the stirring motor to run, and the stirring motor drives the diversion stirring wheel to rotate;

Step 3: The epoxy asphalt resin or mixture or modified epoxy resin is transported into the feeding pipe by the transfer pump. The mouth enters the feeding barrel, and then falls into the spindle-shaped tank;

Step 4: The rotating spindle-shaped tank continuously shears the epoxy asphalt resin or the mixture or the modified epoxy resin through the conveying and shearing blade;

Step 5: Move the bridge deck construction equipment to the bridge deck of the steel structure bridge through the carrier, adjust the hanging angle of the mounting frame through the air cylinder, and transport the epoxy asphalt resin or mixture or modified ring through the conveying shear blade. The oxygen resin is output from the discharge port to the spindle-shaped tank, and the epoxy asphalt resin or mixture or modified epoxy resin falls to the bridge deck of the steel structure bridge through the discharge hopper;

Step 6: Start the lift cylinder, the lift cylinder extends to drive the support rod down, thereby driving the height of the flat pressing roller to drop, and the epoxy asphalt resin or mixture or modified epoxy resin is spread on the bridge deck of the steel structure bridge.

Beneficial effects of the present invention:

In the present invention, the clamping seat is arranged to cooperate with the docking seat, the top support plates at the top of the two sets of inclined steel beams are butted with the bottom of the main beam plate, several groups of clamping seats are in one-to-one correspondence with the docking seats, and the cross bars and steel cylinders at the bottom of the docking seats The cross groove, the cross groove and the circular groove at the top of the clamping seat are respectively clamped, and the welding beam and the support beam are in the gap between several clamping seats and are welded and fixed with the top of the top support plate, which is convenient for the main The installation between the beam plate and the top support plate adopts the method of clamping and welding, which improves the installation firmness and stability of the main beam plate;

By arranging the load-bearing steel frame at the bottom of the main beam plate, firstly, multiple sets of reinforced steel rods are arranged in the load-bearing steel frame to combine the connecting beams and multiple connecting vertical beams to improve the support strength. The fixing holes opened on the outer side of the socket ring on the periphery of each reinforced steel rod are clamped and fixed by pin rods, so that the reinforced steel rods can be used to share the pressure on both ends of the main girder plate, thereby improving the load-bearing capacity of the entire viaduct steel structure , to improve the service life of the entire steel structure, making the entire steel structure more compressive.

Description of drawings

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

Fig. 1 is the side view of the viaduct steel structure of the present invention;

Fig. 2 is the structural drawing of the bottom steel beam of the present invention;

Fig. 3 is the bottom view of the main beam plate of the present invention;

4 is a front view of the load-bearing steel frame of the present invention.

Fig. 5 is the bridge deck structure schematic diagram in the present invention;

Fig. 6 is the structural representation of epoxy pitch carbon fiber protective layer in the present invention;

Fig. 7 is the structural representation of epoxy asphalt crushed stone shear layer in the present invention;

Fig. 8 is the structural representation of modified epoxy waterproof reinforcement layer in the present invention;

Fig. 9 is the structural representation of modified epoxy crushed stone micro-surface treatment layer in the present invention;

Fig. 10 is the structural representation of bridge deck laying construction equipment in the present invention;

11 is a schematic structural diagram of the asphalt laying mechanism in the present invention;

12 is a schematic diagram of the internal structure of the outer casing in the present invention;

Fig. 13 is the internal structure schematic diagram of the side view of the rotating drum in the present invention;

Figure 14 is the connection view of the stirring motor and the split stirring wheel in the present invention;

15 is a schematic diagram of the internal structure of the rotating drum in the present invention;

16 is a schematic diagram of the internal structure of a spindle-shaped tank in the present invention;

Fig. 17 is the enlarged schematic diagram of the place A in Fig. 12 in the present invention;

18 is a schematic structural diagram of the asphalt flattening mechanism in the present invention;

Fig. 19 is the connection view of the counterweight balance block, the support rod and the flat pressing roller in the present invention;

In the figure: 1. Main beam plate; 2. Bearing steel frame; 3. Supporting steel frame; 4. Bottom steel beam; 5. Inclined steel beam; 6. Top support plate; 9. Welded beam; 10. Support beam; 11. Reinforced steel rod; 12. Connecting beam; 13. Connecting vertical beam; 14. Socket ring; 15. Fixing hole; 16. Pin rod; 17. Steel structure bridge; 18 , epoxy asphalt carbon fiber protective layer; 19, epoxy asphalt gravel shear layer; 20, epoxy asphalt concrete layer; 21, modified epoxy waterproof reinforcement layer; 22, modified epoxy gravel micro-surface treatment layer; 181, the first epoxy asphalt resin layer; 182, the carbon fiber cloth layer; 191, the second epoxy asphalt resin layer; 192, the crushed stone shear layer; 211, the first modified epoxy resin layer; Cracked cloth layer; 221, Second modified epoxy resin layer; 222, Gravel micro-surface treatment layer; 300, Asphalt laying mechanism; 400, Asphalt flat pressing mechanism; 301, Mounting frame; 302, Feeding pipe; 303, Shell body; 304, shielding cover; 305, discharge hopper; 306, triangular bracket; 307, support frame; 308, rotating wheel; 309, rotary drum; 310, support base; 311, limit bracket; 312, drive motor; 313, Track; 314, stirring motor; 315, feeding drum; 316, linkage shaft; 317, splitting stirring wheel; 318, spindle-shaped tank; 319, feeding port; 320, conveying shearing blade; 321, discharging port; 322, installation base; 323, auxiliary roller; 401, counterweight balance block; 402, support rod; 403, lift cylinder; 404, flat pressure roller; 405, reinforcement rod.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-4, a viaduct steel structure includes a main beam plate 1, a load-bearing steel frame 2 is installed in the middle of the bottom of the main beam plate 1, and the bottom of the main beam plate 1 is adjacent to the two sides of the load-bearing steel frame 2 respectively. Two sets of parallel supporting steel frames 3 are installed, and the main beam plate 1 is supported by the supporting steel frames 3 combined with the load-bearing steel frame 2;

The supporting steel frame 3 includes a bottom steel beam 4, and the top of the bottom steel beam 4 is installed with an inclined steel beam 5 at both ends, and a top support plate 6 is installed between the tops of the two groups of inclined steel beams 5, and the top support plate 6 There are several groups of card sockets 7 installed on the top of the ;

The bottom of the main beam plate 1 is provided with several groups of docking seats 8, and the bottom center line of the main beam plate 1 is provided with a welding beam 9, and both sides of the welding beam 9 are provided with several groups of supporting beams 10. The docking seat 8 and the clamping seat 7-phase connection;

The inner side of the load-bearing steel frame 2 is provided with a number of parallel reinforcing steel rods 11, and a connecting beam 12 is arranged between the inner sides of the several reinforcing steel rods 11. The connecting vertical beams 13 are connected between the ends, and the outer side of the reinforcing steel rod 11 is sleeved with a sleeve ring 14 at the bottom. Pin rod 16.

The length of the top of the main beam plate 1 is smaller than the length of the top, and several groups of strip grooves are opened on the top of the main beam plate 1, and the strip grooves are arranged to facilitate the later pouring.

The clamping seat 7 and the docking seat 8 are both cylindrical, and the top of the clamping seat 7 is provided with a cross groove and a circular groove.

The bottom of the docking seat 8 is connected with a cross bar and four steel cylinders, the four steel cylinders are respectively fitted with four groups of circular grooves, and the cross bars and the cross grooves are clamped.

The opposite ends of the two sets of inclined steel beams 5 are connected with cross beams, and two parallel vertical beams are connected between the bottom of the cross beam and the top of the bottom steel beam 4, and vertical beams are arranged to reinforce the cross beams.

The load-bearing steel frame 2 is arranged in a rectangular frame shape, and the top of the load-bearing steel frame 2 is welded and fixed to the bottom of the main beam plate 1 .

When the present invention is in use, firstly, the main beam plate 1 is fixed with the load-bearing steel frame 2 and the supporting steel frame 3, the top support plates 6 on the top of the two sets of inclined steel beams 5 are butted with the bottom of the main beam plate 1, and several groups are clamped. The seat 7 corresponds to the docking seat 8 one-to-one, the cross bar and the steel cylinder at the bottom of the docking seat 8 are respectively clamped with the cross groove, the cross groove and the circular groove on the top of the clamping seat 7, and the welding beam 9 and the supporting beam 10 are in several positions. The four sets of supporting steel frames 3 are all supported at the bottom of the main beam plate 1, and the load-bearing steel frames 2 are arranged at the bottom of the main beam plate 1 in the gaps between the clamping seats 7 and are fixed by welding with the top of the top support plate 6. At the bottom, in the load-bearing steel frame 2, firstly, multiple sets of reinforcing steel rods 11 are arranged in combination with the connecting beams 12 and the multiple connecting vertical beams 13 to improve the support strength, and at the same time, the inclined rods can be connected on each supporting steel frame 3 and clipped into each reinforcing steel rod 11. In the fixing hole 15 opened on the outer side of the outer sleeve ring 14, and the pin rod 16 is used for clamping and fixing, so that the reinforced steel rod 11 can be used to share the pressure on both ends of the main girder plate 1, thereby improving the load-bearing of the entire viaduct steel structure. ability to improve the service life of the entire steel structure.

In the present invention, the clamping seat 7 is arranged to cooperate with the docking seat 8, the top support plates 6 at the top of the two sets of inclined steel beams 5 are butted with the bottom of the main beam plate 1, and several groups of clamping seats 7 are in one-to-one correspondence with the docking seats 8, and the docking seats 8. The cross bar and steel cylinder at the bottom are respectively clamped with the cross groove, the cross groove and the circular groove at the top of the clamping seat 7. The welding beam 9 and the supporting beam 10 are in the gaps between several clamping seats 7 and are connected with each other. The top of the top support plate 6 is welded and fixed, which facilitates the installation between the main beam plate 1 and the top support plate 6, and adopts the method of clamping and re-welding, which improves the installation firmness and stability of the main beam plate 1; By arranging the load-bearing steel frame 2 at the bottom of the main beam plate 1, firstly, multiple sets of reinforcing steel rods 11 are arranged in the load-bearing steel frame 2 in combination with the connecting beams 12 and the multiple connecting vertical beams 13 to improve the support strength, and at the same time, the supporting steel frames 3 The upper connecting oblique rod is snapped into the fixing hole 15 opened on the outer side of the socket ring 14 on the periphery of each reinforced steel rod 11, and the pin rod 16 is used for clamping and fixing, so that the reinforced steel rod 11 can be used to share the two ends of the main beam plate 1. The pressure received, thereby improving the load-bearing capacity of the entire viaduct steel structure, improving the service life of the entire steel structure, and making the entire steel structure more resistant to compression.

As shown in Figures 5-9, the viaduct deck of the present invention includes, from bottom to top, a steel structure bridge 17, an epoxy asphalt carbon fiber protective layer 18, an epoxy asphalt crushed stone shear layer 19, an epoxy asphalt concrete layer 20, and a modified epoxy asphalt concrete layer 20. Epoxy waterproof reinforcement layer 21 and modified epoxy gravel micro-surface treatment layer 22;

The epoxy pitch carbon fiber protective layer 18 is composed of a first epoxy pitch resin layer 181 disposed on the bridge deck of the steel structure bridge 17 and a carbon fiber cloth layer 182 bonded to the first epoxy pitch resin layer 181;

The epoxy asphalt crushed stone shear layer 19 is composed of a second epoxy asphalt resin layer 191 arranged on the carbon fiber cloth layer 182 and a crushed stone shear layer 192 laid on the second epoxy asphalt resin layer 191;

The epoxy asphalt concrete layer 20 is formed by the solidification of a mixture consisting of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber, which is arranged on the epoxy asphalt crushed stone shear layer 19;

The modified epoxy waterproof reinforcement layer 21 is composed of a first modified epoxy resin layer 211 disposed on the epoxy asphalt concrete layer 20 and a grid bonded to the first modified epoxy resin layer 211 The anti-cracking cloth layer 212 is formed;

The modified epoxy gravel micro-surface treatment layer 22 is composed of a second modified epoxy resin layer 221 arranged on the modified epoxy waterproof reinforcement layer 21 and a second modified epoxy resin layer 221 laid on the second modified epoxy resin layer 221. The gravel micro-surface treatment layer 222 is formed;

The viaduct steel structure construction method includes the following steps:

Step 1: Carry out shot blasting cleaning and rust removal treatment on the bridge deck 17 of the steel structure bridge, so that the cleanliness can reach Sa2.5 level and the roughness can reach 60-100um;

Step 2: Lay epoxy asphalt resin on the cleaned steel structure bridge 17 with a laying amount of 0.4 to 0.6 kg/m2 to form a first epoxy asphalt resin layer 181, and at the same time on the first epoxy asphalt resin layer 181 It is reinforced with 3K200g carbon fiber cloth on it to form an epoxy pitch carbon fiber protective layer 18;

Step 3: Before the epoxy pitch carbon fiber protective layer 18 is cured, lay epoxy pitch resin on its surface with a laying amount of 1.2-1.5 kg/m2 to form a second epoxy pitch resin layer 191. The asphalt resin layer 191 is sprinkled with crushed stones with a particle size of 4 to 6 mm, and the crushed stones account for 20 to 30% of the surface area of the second epoxy asphalt resin layer 191. After curing, the epoxy asphalt crushed stone shear layer 19 is formed;

Step 4: Lay the mixture on the epoxy asphalt crushed stone shear layer 19 to form the epoxy asphalt concrete layer 20;

Step 5: Carry out shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer 20, remove dust, and lay modified epoxy resin with a laying amount of 0.4-0.6 kg/m2 to form a first modified epoxy resin layer 211. A grid anti-cracking cloth is attached on the first modified epoxy resin layer 211 to form a modified epoxy waterproof reinforcement layer 21;

Step 6: Lay the modified epoxy resin on the modified epoxy waterproof reinforcement layer 21 as a cementing material, and the laying amount is 0.8-1.2 kg/m2 to form the second modified epoxy resin layer 221. In the second modified epoxy resin layer 221 The epoxy resin layer 221 is sprinkled with crushed stones with a particle size of 4-6 mm to form the modified epoxy crushed stone micro-surface treatment layer 22. After curing, the construction of the viaduct steel structure is completed.

As shown in Figure 10-19, laying epoxy asphalt resin, laying mixture and laying modified epoxy resin are all laid by bridge deck laying construction equipment. The bridge deck laying construction equipment includes asphalt laying mechanism 300 and asphalt flat pressing mechanism 400, an asphalt flat pressing mechanism 400 is installed at the bottom of the asphalt laying mechanism 300;

The asphalt laying mechanism 300 includes a mounting frame 301, a feeding pipe 302, an outer casing 303, a discharging hopper 305, a supporting frame 307, a rotating drum 309, a driving motor 312, a rail 313, a spindle-shaped tank 318, and a conveying and shearing blade 320. Auxiliary rollers 323, rotating wheels 308 are installed on both sides of the bottom of the mounting frame 301 through rotating shafts, two supporting frames 307 are installed on the top of the mounting frame 301, and rotating drums are installed on the tops of the two supporting frames 307. 309, an outer casing 303 is provided just above the rotating cylinder 309, a shielding cover 304 is installed at one end of the outer casing 303, and a triangular bracket 306 is installed on the top of one end of the mounting frame 301, wherein the supporting frame 307 away from the triangular bracket 306 is one. A limit bracket 311 is installed on the side, a support base 310 is installed in the inner cavity of the limit bracket 311, and the bottom end of the outer casing 303 is connected with the limit bracket 311 and the top ends of the two support brackets 307. The shielding cover The two sides of the bottom of 304 are respectively connected to the top ends of the two sides of the triangular support 306, and a discharge hopper 305 is installed in the middle position of the top of the triangle support 306, and the discharge hopper 305 is located directly below the shielding cover 304;

A mounting base 322 is installed on both sides of the top of the mounting frame 301 , and auxiliary rollers 323 are mounted on the mounting base 322 through a rotating shaft. On the spindle-shaped tank body 318, the spindle-shaped tank body 318 is installed in the inner cavity of the rotating drum 309, and several conveying and shearing blades 320 are installed on the inner wall of the spindle-shaped tank body 318. The spindle-shaped tank body 318 One end of 318 is provided with a discharge port 321, the discharge port 321 is located between the discharge hopper 305 and the shielding cover 304, and the other end of the spindle-shaped tank 318 is installed with a feeding cylinder 315, which is on the outer wall of the feeding cylinder 315. A plurality of feeding ports 319 are provided, and a linkage shaft 316 is installed at one end of the feeding cylinder 315 away from the spindle-shaped tank body 318. The drive motor 312 is installed on the top of the support base 310;

The feeding tube 315 is movably sleeved with a feeding tube 302 , the bottom end of the feeding tube 302 is fixedly installed on one of the support frames 307 , the top of the feeding tube 302 penetrates the outer casing 303 , and one side of the feeding tube 302 is A stirring motor 314 is installed on the top, and a splitting stirring wheel 317 is installed on the output shaft of the stirring motor 314, and the splitting stirring wheel 317 is located in the inner cavity of the feeding pipe 302;

The asphalt flattening mechanism 400 includes a counterweight balance block 401, a support rod 402, a lifting cylinder 403, a flattening roller 404, and a reinforcement rod 405. Both ends of one side of the counterweight balance block 401 are installed with support rods 402, a flat pressing roller 404 is rotatably installed between one end of the two support rods 402 away from the counterweight balance block 401, a number of reinforcement rods 405 are installed between the two support rods 402, and the two support rods 402 Several lifting cylinders 403 are mounted on the top, and the tops of the several lifting cylinders 403 are all mounted on the bottom of the mounting frame 301 .

The laying process of bridge deck laying construction equipment is as follows:

Step 1: The bridge deck laying construction equipment is hung on the carrier through the mounting frame 301, and the hanging angle of the mounting frame 301 can be adjusted through the air cylinder on the carrier;

Step 2: start the drive motor 312, the drive motor 312 drives the spindle-shaped tank 318 to rotate through the linkage shaft 316 and the feeding cylinder 315, starts the stirring motor 314 to run, and the stirring motor 314 drives the shunt stirring wheel 317 to rotate;

Step 3: The epoxy asphalt resin or the mixture or the modified epoxy resin is transported to the feeding pipe 302 by the delivery pump. The feeding port 319 enters the feeding barrel 315, and then falls into the spindle-shaped tank 318;

Step 4: The rotating spindle-shaped tank 318 continuously shears the epoxy asphalt resin or the mixture or the modified epoxy resin through the conveying and shearing blade 320;

Step 5: Move the bridge deck construction equipment to the bridge deck of the steel structure bridge 17 by the carrier, adjust the hanging angle of the mounting frame 301 by the air cylinder, and transport the epoxy asphalt resin or mixture or The modified epoxy resin is output from the discharge port 321 to the spindle-shaped tank 318, and the epoxy asphalt resin or mixture or modified epoxy resin falls to the bridge deck of the steel structure bridge 17 through the discharge hopper 105;

Step 6: Activate the lift cylinder 403, the lift cylinder 403 extends to drive the support rod 402 to descend, thereby driving the height of the flat pressing roller 404 to drop, and the epoxy asphalt resin or mixture or modified epoxy resin is spread on the steel structure bridge 17 on the bridge.

The above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments do not exhaust all the details, nor do they limit the invention to only such specific embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. These embodiments are selected and described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is to be limited only by the claims and their full scope and equivalents.

Claims (10)

1. a viaduct steel structure construction method, is characterized in that, the viaduct steel structure comprises the main girder plate (1), the bottom middle of the described main girder plate (1) is installed with the load-bearing steel frame (2), and the main girder plate ( Two sets of parallel supporting steel frames (3) are respectively installed on both sides of the bottom of 1) against the load-bearing steel frame (2); The supporting steel frame (3) includes a bottom steel beam (4), and inclined steel beams (5) are installed on both ends of the top of the bottom steel beam (4), and the tops of the two groups of the inclined steel beams (5) are installed A top support plate (6) is installed therebetween, and several groups of snap seats (7) are installed on the top of the top support plate (6); The bottom of the main beam plate (1) is provided with several groups of docking seats (8), and the center line of the bottom of the main beam plate (1) is provided with a welding beam (9), both sides of the welded beam (9) are provided There are several groups of support beams (10); The inner side of the load-bearing steel frame (2) is provided with a plurality of parallel reinforcing steel rods (11), and connecting beams (12) are arranged between the inner sides of the plurality of reinforcing steel rods (11), and the connecting beams (12) ) are connected with connecting vertical beams (13) between the bottom and bottom of the load-bearing steel frame (2) respectively, and the outer side of the reinforcing steel rod (11) is sleeved with a sleeve ring (14) near the bottom. , and a fixing hole (15) is provided on the outside of the socket ring (14), and pin rods (16) are provided on both sides of the socket ring (14); The viaduct deck includes, from bottom to top, a steel structure bridge (17), an epoxy asphalt carbon fiber protective layer (18), an epoxy asphalt crushed stone shear layer (19), an epoxy asphalt concrete layer (20), and a modified epoxy a waterproof reinforcement layer (21) and a modified epoxy gravel micro-surface treatment layer (22); The epoxy pitch carbon fiber protective layer (18) consists of a first epoxy pitch resin layer (181) arranged on the deck of the steel structure bridge (17) and is bonded to the first epoxy pitch resin layer (181) composed of carbon fiber cloth layer (182); The epoxy asphalt crushed stone shear layer (19) is composed of a second epoxy asphalt resin layer (191) arranged on the carbon fiber cloth layer (182) and a second epoxy asphalt resin layer (191) laid on the second epoxy asphalt resin layer (191). Crushed stone shear layer (192) is formed; The epoxy asphalt concrete layer (20) is formed by the solidification of a mixture consisting of epoxy asphalt resin, concrete aggregate, concrete filler and concrete fiber, which is arranged on the epoxy asphalt crushed stone shear layer (19); The modified epoxy waterproof reinforcement layer (21) consists of a first modified epoxy resin layer (211) arranged on the epoxy asphalt concrete layer (20) and a first modified epoxy resin layer (211) bonded to the first modified epoxy resin The mesh anti-cracking cloth layer (212) on the layer (211) is formed; The modified epoxy gravel micro-surface treatment layer (22) is composed of a second modified epoxy resin layer (221) arranged on the modified epoxy waterproof reinforcement layer (21) and a second modified epoxy resin layer (221) laid on the second modified ring composed of a micro-surface treatment layer (222) of crushed stone on the oxygen resin layer (221); The viaduct steel structure construction method includes the following steps: Step 1: Carry out shot blasting cleaning and rust removal treatment on the deck of the steel structure bridge (17), so that the cleanliness can reach Sa2.5 level and the roughness can reach 60-100um; Step 2: Lay epoxy asphalt resin on the bridge deck of the cleaned steel structure bridge (17), with a laying amount of 0.4 to 0.6 kg/m2, to form a first epoxy asphalt resin layer (181), and at the same time, on the first epoxy resin layer (181) The asphalt resin layer (181) is fully affixed with 3K200g carbon fiber cloth for reinforcement to form an epoxy pitch carbon fiber protective layer (18); Step 3: Before the epoxy pitch carbon fiber protective layer (18) is cured, lay epoxy pitch resin on its surface, and the laying amount is 1.2-1.5 kg/m2 to form a second epoxy pitch resin layer (191). The second epoxy asphalt resin layer (191) is sprinkled with crushed stones with a particle size of 4 to 6 mm, and the crushed stones account for 20 to 30% of the surface area of the second epoxy asphalt resin layer (191). stone shear layer (19); Step 4: laying a mixture on the epoxy asphalt crushed stone shear layer (19) to form an epoxy asphalt concrete layer (20); Step 5: Carry out shot blasting cleaning on the surface of the cured epoxy asphalt concrete layer (20), remove dust and dust, and lay modified epoxy resin with a laying amount of 0.4-0.6 kg/m2 to form a first modified epoxy resin layer (211), adding a mesh anti-cracking cloth on the first modified epoxy resin layer (211) to form a modified epoxy waterproof reinforcement layer (21); Step 6: Lay the modified epoxy resin as a cementing material on the modified epoxy waterproof reinforcement layer (21), and the laying amount is 0.8-1.2 kg/m2 to form the second modified epoxy resin layer (221). The second modified epoxy resin layer (221) is sprinkled with crushed stones with a particle size of 4-6 mm to form a modified epoxy crushed stone micro-surface treatment layer (22). After curing, the viaduct steel structure is completed. construction. 2. A viaduct steel structure construction method according to claim 1, characterized in that the top length of the main girder plate (1) is less than the top length thereof, and the top of the main girder plate (1) is provided with several groups Bar slot. 3. A method for constructing a viaduct steel structure according to claim 1, characterized in that, the snap seat (7) and the docking seat (8) are both arranged in a cylindrical shape, and the top of the snap seat (7) The opening consists of a cross groove and a circular groove. The number of the circular grooves is four groups, and the four sides of the cross groove are respectively set. 4. A kind of viaduct steel structure construction method according to claim 3, is characterized in that, the bottom of described docking seat (8) is connected with cross bars and four steel cylinders, and the four steel cylinders are respectively connected with four groups of circular The slot is adapted, and the cross bar is snapped with the cross slot. 5. A kind of viaduct steel structure construction method according to claim 1, is characterized in that, the opposite ends of two groups of described inclined steel beams (5) are connected with cross beams, and the bottom of the cross beam and the top of the bottom steel beam (4) There are two parallel vertical beams connected between them. 6. A method for constructing a viaduct steel structure according to claim 1, wherein the load-bearing steel frame (2) is arranged in a rectangular frame shape, and the top of the load-bearing steel frame (2) is connected to the main girder plate (1). ) is welded to the bottom. 7. The viaduct steel structure construction method according to claim 1, wherein the laying epoxy asphalt resin, laying mixture and laying modified epoxy resin are all laid by bridge deck laying construction equipment, and bridge deck laying The construction equipment includes an asphalt laying mechanism (300) and an asphalt flat pressing mechanism (400), and an asphalt flat pressing mechanism (400) is installed at the bottom of the asphalt laying mechanism (300); Wherein, the asphalt laying mechanism (300) includes a mounting frame (301), a feeding pipe (302), an outer casing (303), a discharging hopper (305), a supporting frame (307), a rotating drum (309), a driving motor ( 312), a track (313), a spindle-shaped tank (318), a conveying and shearing blade (320), an auxiliary roller (323), and rotating wheels (308) are installed on both sides of the bottom of the mounting frame (301) through rotating shafts , two supporting frames (307) are installed on the top of the mounting frame (301), and a rotating cylinder (309) is rotatably installed on the top of the two supporting frames (307), and a casing is provided directly above the rotating cylinder (309). body (303), a shield (304) is installed at one end of the outer body (303), and a triangular bracket (306) is installed at the top of one end of the mounting bracket (301), wherein the support bracket (307) is far away from the triangular bracket (306). ) a limit bracket (311) is installed on one side, a support base (310) is installed in the inner cavity of the limit bracket (311), and the bottom end of the outer shell (303) is connected to the limit bracket (311), two The top ends of the support frames (307) are connected, and both sides of the bottom of the shielding cover (304) are respectively connected to the top ends of the two sides of the triangular bracket (306), and a discharge hopper (305) is installed in the middle position of the top of the triangular bracket (306), The discharging hopper (305) is located just below the shielding cover (304); Wherein, the asphalt flattening mechanism (400) includes a counterweight balance block (401), a support rod (402), a lifting cylinder (403), a flattening roller (404), and a reinforcement rod (405), and the counterweight balances Support rods (402) are installed on both ends of one side of the block (401), and a flat pressing roller (404) is rotatably installed between one end of the two support rods (402) away from the counterweight balance block (401). Several reinforcement rods (405) are installed between the support rods (402), and several lifting cylinders (403) are installed on the tops of the two supporting rods (402), and the tops of the several lifting cylinders (403) are installed are installed at the bottom of the mounting bracket (301). 8. The viaduct steel structure construction method according to claim 7, wherein a mounting base (322) is installed on both sides of the top of the mounting frame (301), and a rotating shaft is mounted on the mounting base (322). Auxiliary rollers (323), two auxiliary rollers (323) are respectively connected to both sides of the bottom of the track (313) in rolling connection, the track (313) is sleeved on the spindle-shaped tank body (318), and the spindle-shaped tank body ( 318) is installed in the inner cavity of the rotating drum (309), a plurality of conveying shearing blades (320) are installed on the inner wall of the spindle-shaped tank (318), and one end of the spindle-shaped tank (318) is provided with a row The discharge port (321) is located between the discharge hopper (305) and the shielding cover (304), and the other end of the spindle-shaped tank (318) is provided with a feeding cylinder (315), so A plurality of feeding ports (319) are opened on the outer wall of the feeding cylinder (315), and a linkage shaft (316) is installed at one end of the feeding cylinder (315) away from the spindle-shaped tank body (318), and the linkage shaft ( 316) One end away from the feeding cylinder (315) is connected to the output shaft of the driving motor (312), and the driving motor (312) is mounted on the top of the supporting base (310). 9 . The method for constructing a viaduct steel structure according to claim 8 , wherein a feeding tube ( 302 ) is movably sleeved on the feeding cylinder ( 315 ), and the bottom end of the feeding tube ( 302 ) is fixedly installed on the On one of the support frames (307), the top of the feeding pipe (302) penetrates the outer casing (303), and a stirring motor (314) is installed on one side of the feeding pipe (302). A split-flow stirring wheel (317) is installed on the output shaft, and the split-flow stirring wheel (317) is located in the inner cavity of the feeding pipe (302). 10. viaduct steel structure construction method according to claim 7, is characterized in that, the laying process of described bridge deck laying construction equipment is as follows: Step 1: The bridge deck laying construction equipment is hung on the carrier through the mounting frame (301), and the hanging angle of the mounting frame (301) can be adjusted by the air cylinder on the carrier; Step 2: start the drive motor (312), the drive motor (312) rotates through the linkage shaft (316) and the feeding cylinder (315) to drive the spindle-shaped tank (318) to rotate, start the stirring motor (314) to run, and the stirring motor ( 314) drive the diversion stirring wheel (317) to rotate; Step 3: The epoxy asphalt resin or the mixture or the modified epoxy resin is transported to the feeding pipe (302) by the transfer pump, and the epoxy asphalt resin or the mixture or the modified epoxy resin is passed through the diversion stirring wheel (317). After the diversion, it enters the feeding cylinder (315) through the feeding port (319), and then falls into the spindle-shaped tank (318); Step 4: 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 5: Move the construction equipment for laying the bridge deck to the deck of the steel structure bridge (17) by means of a carrier, adjust the hanging angle of the mounting frame (301) by the air cylinder, and transport the epoxy resin by the shearing blade (320). The asphalt resin or mixture or modified epoxy resin is output from the discharge port (321) to the spindle-shaped tank (318), and the epoxy asphalt resin or mixture or modified epoxy resin falls to the steel structure through the discharge hopper (305). the deck of the bridge (17); Step 6: Activate the lift cylinder (403), the lift cylinder (403) extends to drive the support rod (402) to descend, thereby driving the height of the flat pressing roller (404) to drop, and the epoxy asphalt resin or mixture or modified epoxy resin is lowered. The resin is laid flat on the deck of the steel structure bridge (17).

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