An assembled steel-concrete composite beam bridge and construction method

Abstract

This invention discloses a prefabricated steel-concrete composite beam bridge for traffic control and its construction method, comprising several steel pipe piles and a main beam frame; a positioning seat is installed above the steel pipe piles, and an I-beam load-bearing beam is slidably installed inside the positioning seat, with a support structure and a positioning structure installed on the I-beam load-bearing beam; During the construction of the traffic control bridge, the main beam frame can be welded to two erected U-shaped support platforms, using the U-shaped support platforms to provide support for the main beam frame. If the spacing between two adjacent main beam frames is inconsistent, the U-shaped support platforms can be pushed and pulled by activating a push-pull hydraulic cylinder, causing the U-shaped support platforms to move the main beam frame, allowing for fine-tuning of the main beam frame's position without being affected by wind, making the fine-tuning process more convenient and precise, while ensuring the stability and safety of the main beam frame. During subsequent dismantling of the main beam frame, the spacing can also be adjusted to leave sufficient space on both sides for hoisting operations.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a prefabricated steel-concrete composite beam bridge for maintaining traffic flow and its construction method. Background Technology

[0002] Prefabricated steel-concrete composite beam bridges are a new type of bridge construction method. They use prefabricated steel-concrete composite beam components and are quickly assembled on site. The superstructure of this type of bridge is composed of two materials, steel and concrete, which work together through shear connectors.

[0003] Chinese Patent Publication No. CN109778660A discloses a steel bridge constructed using prefabricated abutments, comprising prefabricated abutments, a main beam, a bridge deck, and steel pipe piles. The prefabricated abutments include support columns, the upper ends of which have lateral support extending towards the land side; the lower ends of the support columns are fixed to a connecting beam, which is connected to and supported by the steel pipe piles; both ends of the main beam are supported by steel pipe piles, and the bridge deck is located above the main beam and supported by it.

[0004] In the aforementioned prior art, the support effect of the concrete bridge deck is achieved by setting the main beam, but no fine-tuning measures for the main beam are set. In the construction of prefabricated bridges, there are strict requirements for the installation position of the main beam. Therefore, the main beam needs to be hoisted and adjusted to a suitable installation position. However, during the hoisting and adjustment of the main beam position, it is easily affected by the wind, which can cause the main beam to sway and affect the position adjustment of the main beam. Therefore, a prefabricated steel-concrete composite beam bridge and its construction method are needed to meet people's needs. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated steel-concrete composite beam bridge for traffic maintenance and a construction method thereof, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the first aspect of this application provides a prefabricated steel-concrete composite beam bridge for traffic control, comprising a plurality of steel pipe piles and a main beam frame; a positioning seat is installed above the steel pipe piles, an I-beam load-bearing beam is slidably installed inside the positioning seat, a support structure and a positioning structure are installed on the I-beam load-bearing beam, the main beam frame is installed on the support structure, a plurality of U-shaped blocks are movably installed on the I-beam load-bearing beam, a reinforcing structure is installed on the U-shaped blocks, a roller frame is slidably installed on the support structure, and a fine-tuning structure is installed on the roller frame.

[0007] Preferably, the support structure includes several L-shaped support seats, which are evenly installed on both sides of the I-beam load-bearing beam. A U-shaped support platform is movably installed on the L-shaped support seats, and a welding plate is installed on the top of the U-shaped support platform. The main beam frame is movably installed on the top of the U-shaped support platform.

[0008] Preferably, the positioning structure includes a T-shaped positioning hole, which is opened inside the positioning seat. An I-beam is movably installed in the T-shaped positioning hole. Several connecting holes are opened inside the I-beam, and a positioning screw is movably installed in the connecting holes. A threaded hole is opened inside the positioning seat, and one end of the positioning screw is threaded into the threaded hole.

[0009] Preferably, the reinforcement structure includes fixed diagonal braces, which are installed on one side of the U-shaped block. Each of the two fixed diagonal braces is equipped with a movable sleeve, which is respectively fitted onto two corresponding steel pipe piles. The same reinforcement rod is installed between two adjacent movable sleeves. Several reinforcement inclined plates are installed on the I-beam load-bearing beam, and the reinforcement inclined plates are installed on corresponding positioning seats.

[0010] Preferably, a T-shaped positioning block is movably installed below the U-shaped locking block, and a positioning pin is movably installed inside the T-shaped positioning block. The positioning pin is installed below the I-beam load-bearing beam, and one end of a fixing screw is movably installed inside the T-shaped positioning block. The other end of the fixing screw passes through the T-shaped positioning block and the U-shaped locking block and is threaded into the inside of the I-beam load-bearing beam. The inside of the I-beam load-bearing beam has several screw holes that are compatible with the fixing screw.

[0011] Preferably, the fine-tuning structure includes several pulleys, which are rotatably installed inside the roller frame. The roller frame is slidably installed on the inner wall of the U-shaped support platform. A lifting hydraulic cylinder is installed above the U-shaped support platform. The output end of the lifting hydraulic cylinder passes through the U-shaped support platform and is installed above the roller frame. A push-pull hydraulic cylinder for pushing and pulling the U-shaped support platform is installed above the I-beam.

[0012] Preferably, a plurality of mounting screws are movably mounted on the push-pull hydraulic cylinder. The mounting screws are threaded inside the I-beam load-bearing beam. The I-beam load-bearing beam has a plurality of threaded holes that are compatible with the mounting screws. A push-pull plate is mounted on the output end of the push-pull hydraulic cylinder. The push-pull plate is slidably mounted inside the U-shaped support platform. Mounting inclined plates are mounted on both sides of the U-shaped support platform.

[0013] Preferably, the U-shaped support platform has a T-shaped groove inside, and a T-shaped slider is slidably installed in the T-shaped groove. The T-shaped slider is installed on one side of the push-pull plate.

[0014] Preferably, the L-shaped support base has a guide hole inside, and a guide rod is movably installed in the guide hole. The guide rod is installed below the U-shaped support platform.

[0015] The second aspect of this application provides a construction method for a prefabricated steel-concrete composite beam bridge for traffic maintenance. The method uses the prefabricated steel-concrete composite beam bridge described in any of the above embodiments and includes the following steps:

[0016] S1. Fit the movable sleeve onto the steel pipe pile and weld the positioning seat to one end of the steel pipe pile. Insert the steel pipe pile into the designated location so that the T-shaped positioning holes in the same row face the same direction. Then insert the I-beam load-bearing beam into each T-shaped positioning hole at one time. Then pass the positioning screw through the connecting hole and screw it into the corresponding threaded hole to complete the initial fixing of the I-beam load-bearing beam.

[0017] S2. Weld two fixed diagonal braces to the U-shaped clips and fit the U-shaped clips onto the horizontal plate on the underside of the I-beam. Then weld the other end of the two fixed diagonal braces to two adjacent movable sleeves. Weld a reinforcing rod between the two movable sleeves. At this time, place the T-shaped positioning block between the two U-shaped clips and use the fixing screw to fix the position of the T-shaped positioning block and the U-shaped clips to complete the installation of the support part.

[0018] S3. Hoist the U-shaped support platform above the I-beam and insert the guide rod into the guide sliding hole. At the same time, make the pulley contact the top of the I-beam. Use the pulley and the lifting hydraulic cylinder to temporarily support the U-shaped support platform. Then hoist the main beam frame above the two U-shaped support platforms and weld it in place.

[0019] S4. If the spacing between adjacent main beam frames is different, the push-pull plate can be opened to extend and retract its output end, and the U-shaped support platform can be pulled to move above the I-beam load-bearing beam, thereby driving the main beam frame to move and fine-tune the position of the main beam frame.

[0020] S5. After fine-tuning the position of the main beam frame, control the lifting hydraulic cylinder to drive the U-shaped support platform to descend, so that the U-shaped support platform contacts the surface of the L-shaped support seat and the I-beam load-bearing beam. At this time, the contact position can be welded to fix the position of the U-shaped support platform and the main beam frame, thus completing the erection operation of the main beam frame. Finally, a horizontal steel frame is erected above the main beam frame and a concrete bridge deck is laid on top of the horizontal steel frame to complete the construction of the bridge for maintaining traffic flow.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) In the construction of the bridge, the main beam can be welded to two U-shaped support platforms. The U-shaped support platforms provide support for the main beam. If the distance between two adjacent main beams is inconsistent, the U-shaped support platforms can be pushed and pulled by opening the hydraulic cylinder, so that the U-shaped support platforms can drive the main beam to move and make fine adjustments to the position of the main beam. It will not be affected by wind and the fine adjustment process is more convenient and accurate. At the same time, it can ensure the stability and safety of the main beam. When disassembling the main beam in the future, the distance between them can also be adjusted to leave enough room for movement on both sides so that the workers can carry out hoisting operations.

[0023] (2) When installing the I-beam load-bearing beam, it can be slid into the corresponding T-shaped positioning hole. Then, the positioning screw is passed through the I-beam load-bearing beam and screwed into the T-shaped positioning hole. This will allow for the initial positioning and fixing of the I-beam load-bearing beam, ensuring that the I-beam load-bearing beam can be accurately placed in the predetermined position during the installation process, thus providing a safety guarantee for subsequent welding or permanent fixing.

[0024] (3) After the I-beam is installed, the U-shaped clip can be placed on the I-beam and the fixed diagonal brace can be welded on one side of the U-shaped clip and the movable sleeve. Then, the position of the U-shaped clip on the I-beam can be fixed by the T-shaped positioning block. The installation of the fixed diagonal brace can be completed. As an additional support component, the fixed diagonal brace can effectively prevent the structure from tilting or collapsing when subjected to external forces, thus improving the scientificity and practicality of the structure. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a prefabricated steel-concrete composite beam bridge for traffic control and its construction method proposed in this invention;

[0026] Figure 2 This is a partial structural schematic diagram of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0027] Figure 3 This is a schematic diagram of the I-beam connection structure of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0028] Figure 4 This is a schematic diagram of the U-shaped card block connection structure of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0029] Figure 5 This is a schematic diagram of the positioning screw structure of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0030] Figure 6 This is a schematic diagram of a T-shaped positioning block structure for a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0031] Figure 7 This is a schematic diagram of the positioning seat structure for a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0032] Figure 8 This is a schematic diagram of the side structure of the U-shaped support platform of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0033] Figure 9 This is a schematic diagram of the internal structure of the U-shaped support platform of a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0034] Figure 10 This is a schematic diagram of the position and structure of the push-pull hydraulic cylinder in a prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0035] Figure 11 This is a cross-sectional schematic diagram of the U-shaped support platform of the prefabricated steel-concrete composite beam bridge and its construction method proposed in this invention.

[0036] In the diagram: 100, steel pipe pile; 101, main beam frame; 200, positioning seat; 201, I-beam load-bearing beam; 202, L-shaped support seat; 203, U-shaped support platform; 204, welded plate; 205, T-shaped positioning hole; 206, connecting hole; 207, positioning screw; 208, threaded hole; 300, U-shaped locking block; 301, T-shaped positioning block; 302, positioning pin; 303, fixed diagonal brace; 304, movable sleeve; 305, reinforcing rod; 306, reinforcing inclined plate; 307, fixed screw; 400, roller frame; 401, pulley; 402, lifting hydraulic cylinder; 403, push-pull hydraulic cylinder; 404, mounting screw; 405, push-pull plate; 406, T-shaped slide groove; 407, T-shaped slider; 408, guide slide hole; 409, guide rod; 410, mounting inclined plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1-11 The first aspect of this invention provides a prefabricated steel-concrete composite beam bridge, comprising a plurality of steel pipe piles 100 and a main beam frame 101; a positioning seat 200 is installed above the steel pipe piles 100, and an I-beam load-bearing beam 201 is slidably installed inside the positioning seat 200; a support structure and a positioning structure are installed on the I-beam load-bearing beam 201; the main beam frame 101 is installed on the support structure, which supports the main beam frame 101 and the bridge; the positioning structure facilitates the installation of the support structure; a plurality of U-shaped clips 300 are movably installed on the I-beam load-bearing beam 201, and a reinforcing structure is installed on the U-shaped clips 300; the reinforcing structure is used to reinforce the support structure and improve the support stability of the support structure; a roller frame 400 is slidably installed on the support structure, and a fine-tuning structure is installed on the roller frame 400; the fine-tuning structure can fine-tune the erection position of the main beam frame 101.

[0039] Furthermore, the support structure includes several L-shaped support seats 202, which are evenly installed on both sides of the I-beam load-bearing beam 201. A U-shaped support platform 203 is movably installed on the L-shaped support seats 202, and a welded plate 204 is installed on the top of the U-shaped support platform 203. The main beam frame 101 is movably installed on the top of the U-shaped support platform 203. The U-shaped support platform 203 can be used to provide support for the main beam frame 101, while the L-shaped support seats 202 and the I-beam load-bearing beam 201 can provide support for the U-shaped support platform 203.

[0040] Furthermore, the positioning structure includes a T-shaped positioning hole 205, which is located inside the positioning seat 200. The I-beam load-bearing beam 201 is movably installed inside the T-shaped positioning hole 205. Several connecting holes 206 are provided inside the I-beam load-bearing beam 201. A positioning screw 207 is movably installed in the connecting hole 206. A threaded hole 208 is provided inside the positioning seat 200. One end of the positioning screw 207 is threaded into the threaded hole 208. During installation, the connecting hole 206 is aligned with the threaded hole 208, and then the positioning screw 207 is inserted into the connecting hole 206 and screwed into the threaded hole 208, thereby achieving the initial positioning of the I-beam load-bearing beam 201.

[0041] Example 2: Figure 1-7 To improve the support stability of the steel pipe piles 100, a reinforcement structure is arranged on the U-shaped clamp 300. The reinforcement structure includes fixed diagonal braces 303, which are installed on one side of the U-shaped clamp 300. Each of the two fixed diagonal braces 303 is equipped with a movable sleeve 304, which is respectively fitted onto the two corresponding steel pipe piles 100. The same reinforcement rod 305 is installed between two adjacent movable sleeves 304. Several reinforcement inclined plates 306 are installed on the I-beam 201, and the reinforcement inclined plates 306 are installed on the corresponding positioning seats 200.

[0042] A T-shaped positioning block 301 is movably installed below the U-shaped locking block 300. A positioning pin 302 is movably installed inside the T-shaped positioning block 301. The positioning pin 302 is installed below the I-beam load-bearing beam 201. One end of a fixing screw 307 is movably installed inside the T-shaped positioning block 301. The other end of the fixing screw 307 passes through the T-shaped positioning block 301 and the U-shaped locking block 300 and is threaded inside the I-beam load-bearing beam 201. Several screw holes that are compatible with the fixing screw 307 are opened inside the I-beam load-bearing beam 201.

[0043] Weld one end of each of the two fixed diagonal braces 303 to the U-shaped clip 300, then fit the U-shaped clip 300 onto the horizontal plate near the bottom of the I-beam 201. Weld the other ends of the two fixed diagonal braces 303 to two adjacent movable sleeves 304 respectively. After welding, install the T-shaped positioning block 301 on the two positioning pins 302 and fix it in place using the fixing screw 307. This can be used to increase the support stability of the steel pipe pile 100. The remaining features are the same as in Example 1.

[0044] Example 3: As Figure 2-11 To facilitate fine-tuning of the position of the main beam frame 101, a fine-tuning structure is arranged on the roller frame 400. The fine-tuning structure includes several pulleys 401, which are rotatably installed inside the roller frame 400. The roller frame 400 is slidably installed on the inner wall of the U-shaped support platform 203. A lifting hydraulic cylinder 402 is installed above the U-shaped support platform 203. The output end of the lifting hydraulic cylinder 402 passes through the U-shaped support platform 203 and is installed above the roller frame 400.

[0045] A push-pull hydraulic cylinder 403 is installed above the I-beam load-bearing beam 201. Several mounting screws 404 are movably installed on the push-pull hydraulic cylinder 403. The mounting screws 404 are threaded inside the I-beam load-bearing beam 201. Several threaded holes that are compatible with the mounting screws 404 are opened inside the I-beam load-bearing beam 201. A push-pull plate 405 is installed at the output end of the push-pull hydraulic cylinder 403. The push-pull plate 405 is slidably installed inside the U-shaped support platform 203.

[0046] Both sides of the U-shaped support platform 203 are equipped with mounting inclined plates 410. The interior of the U-shaped support platform 203 is provided with a T-shaped slide groove 406. A T-shaped slider 407 is slidably installed in the T-shaped slide groove 406. The T-shaped slider 407 is installed on one side of the push-pull plate 405. The interior of the L-shaped support base 202 is provided with a guide slide hole 408. A guide rod 409 is movably installed in the guide slide hole 408. The guide rod 409 is installed below the U-shaped support platform 203. If the position of the main beam frame 101 is offset, the U-shaped support platform 203 can be moved by opening the push-pull hydraulic cylinder 403, thereby fine-tuning the placement position of the main beam frame 101.

[0047] After adjustment, control the lifting hydraulic cylinder 402 to retract its output end, which will drive the U-shaped support platform 203 to descend. The descending U-shaped support platform 203 will contact the surfaces of the I-beam load-bearing beam 201 and the L-shaped support seat 202, using the I-beam load-bearing beam 201 and the L-shaped support seat 202 to provide support for the U-shaped support platform 203. At this time, the contact points between the U-shaped support platform 203 and the I-beam load-bearing beam 201 and the L-shaped support seat 202 can be welded and fixed. Then, the mounting inclined plate 410 is welded to the I-beam load-bearing beam 201, which can completely fix the position of the U-shaped support platform 203. The remaining features are the same as in Embodiment 1.

[0048] Please see Figure 1-11 The second aspect of this invention provides a construction method for a prefabricated steel-concrete composite beam bridge, comprising the following steps:

[0049] S1. Fit the movable sleeve 304 onto the steel pipe pile 100 and weld the positioning seat 200 to one end of the steel pipe pile. Insert the steel pipe pile 100 into the designated location so that the T-shaped positioning holes 205 in the same row face the same direction. Insert the I-beam load-bearing beam 201 into each T-shaped positioning hole 205 at one time. Then, pass the positioning screw 207 through the connecting hole 206 and screw it into the corresponding threaded hole 208 to complete the initial fixing of the I-beam load-bearing beam 201.

[0050] S2. Weld two fixed diagonal braces 303 onto the U-shaped clip 300 and fit the U-shaped clip 300 onto the horizontal plate on the lower side of the I-beam 201. Then weld the other end of the two fixed diagonal braces 303 onto two adjacent movable sleeves 304. Weld a reinforcing rod 305 between the two movable sleeves 304. At this time, place the T-shaped positioning block 301 between the two U-shaped clips 300 and use the fixing screw 307 to fix the position of the T-shaped positioning block 301 and the U-shaped clip 300 to complete the installation of the support part.

[0051] S3. Hoist the U-shaped support platform 203 above the I-beam 201 and insert the guide rod 409 into the guide sliding hole 408. At the same time, make the pulley 401 contact the top of the I-beam 201. Use the pulley 401 and the lifting hydraulic cylinder 402 to temporarily support the U-shaped support platform 203. Then hoist the main beam frame 101 above the two U-shaped support platforms 203 and weld them in place.

[0052] S4. If the spacing between adjacent main beam frames 101 is different, the push-pull plate 405 can be opened to extend and retract its output end, and the U-shaped support platform 203 can be pulled to move above the I-beam load-bearing beam 201, thereby driving the main beam frame 101 to move and finely adjust the position of the main beam frame 101.

[0053] S5. After fine-tuning the position of the main beam frame 101, control the lifting hydraulic cylinder 402 to drive the U-shaped support platform 203 to descend, so that the U-shaped support platform 203 contacts the surface of the L-shaped support seat 202 and the I-beam load-bearing beam 201. At this time, the contact position can be welded to fix the position of the U-shaped support platform 203 and the main beam frame 101, thus completing the erection operation of the main beam frame 101. Finally, a horizontal steel frame is erected above the main beam frame 101 and a concrete bridge deck is laid on top of the horizontal steel frame to realize the construction of the bridge for maintaining traffic flow.

[0054] The working principle is as follows: First, the movable sleeve 304 is fitted onto the steel pipe pile 100. Then, the positioning seat 200 is welded to one end of the steel pipe pile 100. Next, the steel pipe pile 100 is inserted into the designated location, ensuring that each positioning seat 200 faces the same direction. Then, the positioning seat 200 is hoisted and inserted into the T-shaped positioning hole 205 on the positioning seat 200, connecting it to each positioning seat 200. Simultaneously, the connecting hole 206 is aligned with the threaded hole 208. Finally, the positioning screw 207 is inserted into the connecting hole 206 and screwed into the threaded hole 208.

[0055] By rotating the positioning screw 207 and observing its descent, it is determined whether the connecting hole 206 and the threaded hole 208 are aligned. If they are not aligned, the position of the I-beam load-bearing beam 201 can be finely adjusted. Due to the restriction of the T-shaped positioning hole 205, the I-beam load-bearing beam 201 can only move in one direction, which can prevent offset. After installing the positioning screw 207, the initial positioning of the I-beam load-bearing beam 201 can be achieved. Then, the reinforcing inclined plate 306 is welded between the I-beam load-bearing beam 201 and the positioning seat 200 to reinforce and fix the positioning seat 200 and the I-beam load-bearing beam 201.

[0056] Then, weld one end of each of the two fixed diagonal braces 303 to the U-shaped clip 300. Next, fit the U-shaped clip 300 onto the lower horizontal plate of the I-beam 201. Then, weld the other ends of each of the two fixed diagonal braces 303 to two adjacent movable sleeves 304. After welding, install the T-shaped positioning block 301 onto the two positioning pins 302, with the T-shaped positioning block 301 positioned below the U-shaped clip 300. Then, pass the fixing screw 307 through the corresponding holes in the T-shaped positioning block 301 and the U-shaped clip 300, and screw it into the lower interior of the I-beam 201 using the thread, thus fixing the position of the U-shaped clip 300.

[0057] Multiple intersecting diagonal braces can be welded between two adjacent steel pipe piles 100 to increase stability. Then, the L-shaped support 202 is welded to the I-beam 201, positioning it between the corresponding two reinforcing inclined plates 306. The push-pull hydraulic cylinder 403 is placed above the I-beam 201, and the mounting screw 404 is passed through the mounting seat of the push-pull hydraulic cylinder 403 and screwed into the interior of the I-beam 201 to fix its position. At this point, the U-shaped support platform 203 is hoisted above the push-pull hydraulic cylinder 403, and its descent is controlled to enclose the cylinder. At the same time, the T-shaped slide groove 406 inside the push-pull hydraulic cylinder 403 slides onto the T-shaped slider 407, and while the U-shaped support platform 203 is lowered, it can drive the guide rod 409 to insert into the guide slide hole 408, and make the pulley 401 contact the top of the I-beam load-bearing beam 201. The pulley 401 and the lifting hydraulic cylinder 402 support the U-shaped support platform 203, and lift the U-shaped support platform 203.

[0058] Then, the main beam 101 is hoisted above the two corresponding U-shaped support platforms 203, so that both ends of the main beam 101 contact the two corresponding welding plates 204 respectively. The two ends of the main beam 101 are then welded to the two welding plates 204 and the U-shaped support platforms 203 respectively. If the position of the main beam 101 shifts, the output end of the push-pull hydraulic cylinder 403 can be extended or retracted. During the extension of the output end of the push-pull hydraulic cylinder 403, it pushes the inner wall of the U-shaped support platform 203 through the push-pull plate 405, causing the U-shaped support platform 203 to move. When the output end of the push-pull hydraulic cylinder 403 retracts, it can drive the push-pull plate 405 and the T-shaped slider 407 to move in the direction of the push-pull hydraulic cylinder 403. The T-shaped slider 407, in turn, can pull the U-shaped support platform 203 by cooperating with the T-shaped slide groove 406.

[0059] During movement, the U-shaped support platform 203 drives the guide rod 409 to slide within the guide hole 408, thus restricting the direction of movement of the U-shaped support platform 203 and preventing it from slipping off the I-beam 201. The moving U-shaped support platform 203 drives the roller frame 400 and pulley 401 to move, allowing the pulley 401 to roll above the I-beam 201, resulting in smoother movement of the U-shaped support platform 203. Adjusting the position of the U-shaped support platform 203 allows it to move the main beam frame 101, enabling fine-tuning of its placement. After adjustment, controlling the lifting hydraulic cylinder 402 to retract its output end lowers the U-shaped support platform 203; conversely, extending the output end of the lifting hydraulic cylinder 402 raises the U-shaped support platform 203.

[0060] As the U-shaped support platform 203 rises and falls, it slides on the T-shaped slider 407 via the T-shaped groove 406, thus avoiding interference between the U-shaped support platform 203 and the push-pull plate 405 during the rising and falling process. The continuously descending U-shaped support platform 203 will contact the surfaces of the I-beam load-bearing beam 201 and the L-shaped support base 202, providing support for the U-shaped support platform 203. Simultaneously, during the descent of the U-shaped support platform 203, the mounting inclined plate 410 will contact the surface of the I-beam load-bearing beam 201. At this point, the contact points between the U-shaped support platform 203 and the I-beam load-bearing beam 201 and the L-shaped support base 202 can be welded and fixed. By welding the mounting inclined plate 410 onto the I-beam load-bearing beam 201, the position of the U-shaped support platform 203 can be completely fixed.

[0061] During the subsequent disassembly of the main beam frame 101, the position of the main beam frame 101 can be adjusted by the cooperation of the lifting hydraulic cylinder 402 and the pushing and pulling hydraulic cylinder 403, so that the main beam frame 101 can have enough room to move on both sides, which is convenient for workers to carry out binding or hoisting operations.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated steel-concrete composite beam bridge for traffic control, comprising a plurality of steel pipe piles (100) and a main beam frame (101); characterized in that: A positioning seat (200) is installed above the steel pipe pile (100). An I-beam load-bearing beam (201) is slidably installed inside the positioning seat (200). A support structure and a positioning structure are installed on the I-beam load-bearing beam (201). Several U-shaped blocks (300) are movably installed on the I-beam load-bearing beam (201). A reinforcing structure is installed on the U-shaped blocks (300). A roller frame (400) is slidably installed on the support structure. A fine-tuning structure is installed on the roller frame (400). The supporting structure includes several L-shaped support seats (202), which are evenly installed on both sides of the I-beam load-bearing beam (201). A U-shaped support platform (203) is movably installed on the L-shaped support seat (202). The U-shaped support platform (203) is an inverted U-shaped structure. A welding plate (204) is installed on the top of the U-shaped support platform (203). The main beam frame (101) is movably installed on the top of the U-shaped support platform (203). The fine-tuning structure includes several pulleys (401), which are rotatably mounted inside the roller frame (400). The roller frame (400) is slidably mounted on the inner wall of the U-shaped support platform (203). A lifting hydraulic cylinder (402) is installed above the U-shaped support platform (203). The output end of the lifting hydraulic cylinder (402) passes through the U-shaped support platform (203) and is installed above the roller frame (400). A push-pull hydraulic cylinder (403) for pushing and pulling the U-shaped support platform (203) is installed above the I-beam (201).

2. The prefabricated steel-concrete composite beam bridge for traffic control according to claim 1, characterized in that: The positioning structure includes a T-shaped positioning hole (205), which is opened inside the positioning seat (200). An I-beam load-bearing beam (201) is movably installed inside the T-shaped positioning hole (205). Several connecting holes (206) are opened inside the I-beam load-bearing beam (201). A positioning screw (207) is movably installed in the connecting hole (206). A threaded hole (208) is opened inside the positioning seat (200). One end of the positioning screw (207) is threaded into the threaded hole (208).

3. A prefabricated steel-concrete composite beam bridge for maintaining traffic flow according to claim 2, characterized in that: The reinforcement structure includes fixed diagonal braces (303), which are installed on one side of the U-shaped block (300). Each of the two fixed diagonal braces (303) is equipped with a movable sleeve (304), which is respectively sleeved on the two corresponding steel pipe piles (100). The same reinforcement rod (305) is installed between two adjacent movable sleeves (304). Several reinforcement inclined plates (306) are installed on the I-beam (201), and the reinforcement inclined plates (306) are installed on the corresponding positioning seats (200).

4. A prefabricated steel-concrete composite beam bridge for maintaining traffic flow according to claim 3, characterized in that: A T-shaped positioning block (301) is movably installed below the U-shaped locking block (300). A positioning pin (302) is movably installed inside the T-shaped positioning block (301). The positioning pin (302) is installed below the I-beam load-bearing beam (201). One end of a fixing screw (307) is movably installed inside the T-shaped positioning block (301). The other end of the fixing screw (307) passes through the T-shaped positioning block (301) and the U-shaped locking block (300) and is threaded into the inside of the I-beam load-bearing beam (201). Several screw holes that are compatible with the fixing screw (307) are opened inside the I-beam load-bearing beam (201).

5. A prefabricated steel-concrete composite beam bridge for traffic control according to claim 4, characterized in that: The push-pull hydraulic cylinder (403) is movably mounted with several mounting screws (404). The mounting screws (404) are threaded inside the I-beam load-bearing beam (201). The I-beam load-bearing beam (201) has several threaded holes that are compatible with the mounting screws (404). The output end of the push-pull hydraulic cylinder (403) is equipped with a push-pull plate (405). The push-pull plate (405) is slidably mounted inside the U-shaped support platform (203). Both sides of the U-shaped support platform (203) are equipped with mounting inclined plates (410).

6. A prefabricated steel-concrete composite beam bridge for traffic control according to claim 5, characterized in that: The U-shaped support platform (203) has a T-shaped groove (406) inside, and a T-shaped slider (407) is slidably installed in the T-shaped groove (406). The T-shaped slider (407) is installed on one side of the push-pull plate (405).

7. A prefabricated steel-concrete composite beam bridge for traffic control according to claim 6, characterized in that: The L-shaped support base (202) has a guide slide hole (408) inside, and a guide rod (409) is movably installed in the guide slide hole (408). The guide rod (409) is installed below the U-shaped support platform (203).

8. A construction method for a prefabricated steel-concrete composite beam bridge for traffic control, characterized in that, The method uses the prefabricated steel-concrete composite beam bridge for traffic control as described in claim 7, and includes the following steps: S1. Fit the movable sleeve (304) onto the steel pipe pile (100) and weld the positioning seat (200) to one end of the steel pipe pile. Insert the steel pipe pile (100) into the designated location so that the T-shaped positioning holes (205) in the same row face the same direction. Insert the I-beam load-bearing beam (201) into each T-shaped positioning hole (205) at one time. Then, pass the positioning screw (207) through the connecting hole (206) and screw it into the corresponding threaded hole (208) to complete the initial fixing of the I-beam load-bearing beam (201). S2. Weld two fixed diagonal braces (303) onto the U-shaped clip (300) and fit the U-shaped clip (300) onto the horizontal plate on the lower side of the I-beam (201). Then weld the other end of the two fixed diagonal braces (303) onto two adjacent movable sleeves (304). Weld a reinforcing rod (305) between the two movable sleeves (304). At this time, place the T-shaped positioning block (301) between the two U-shaped clips (300) and use the fixing screw (307) to fix the position of the T-shaped positioning block (301) and the U-shaped clip (300) to complete the installation of the support part. S3. Hoist the U-shaped support platform (203) above the I-beam (201) and insert the guide rod (409) into the guide sliding hole (408). At the same time, make the pulley (401) contact the top of the I-beam (201). Use the pulley (401) and the lifting hydraulic cylinder (402) to temporarily support the U-shaped support platform (203). Then, hoist the main beam frame (101) above the two U-shaped support platforms (203) and weld it in place. S4. If the spacing between adjacent main beam frames (101) is different, the push-pull plate (405) can be opened to extend and retract its output end, and the U-shaped support platform (203) can be pulled to move above the I-beam load-bearing beam (201), thereby driving the main beam frame (101) to move and finely adjust the position of the main beam frame (101). S5. After fine-tuning the position of the main beam frame (101), control the lifting hydraulic cylinder (402) to drive the U-shaped support platform (203) to descend, so that the U-shaped support platform (203) contacts the surface of the L-shaped support seat (202) and the I-beam load-bearing beam (201). At this time, the contact position can be welded to fix the position of the U-shaped support platform (203) and the main beam frame (101), thus completing the erection operation of the main beam frame (101). Finally, a horizontal steel frame is erected above the main beam frame (101), and a concrete bridge deck is laid on top of the horizontal steel frame to realize the construction of the bridge for maintaining traffic flow.

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