Fabricated steel-concrete composite beam unobstructed bridge and construction method

Abstract

The invention discloses a fabricated steel-concrete composite beam unobstructed bridge and a construction method. The fabricated steel-concrete composite beam unobstructed bridge comprises a plurality of steel pipe piles and a main beam frame. A positioning seat is mounted above the steel pipe pile, an I-shaped bearing beam is mounted in the positioning seat in a sliding manner, and a supporting structure and a positioning structure are mounted on the I-shaped bearing beam; according to the invention, during bridge construction, the main beam frames can be welded on the two erected U-shaped supporting tables, the U-shaped supporting tables are utilized to support the main beam frames, and if the distance between the two adjacent main beam frames is not consistent, the U-shaped supporting tables can be pushed and pulled by starting the push-pull hydraulic cylinders, so that the U-shaped supporting tables drive the main beam frames to move; the position of the main beam frame is finely adjusted without being affected by wind power, the fine adjustment process is more convenient and accurate, meanwhile, the stability and safety of the main beam frame can be guaranteed, and when the main beam frame is disassembled subsequently, enough moving space can be reserved on the two sides by adjusting the distance between the main beam frame and the main beam frame, so that workers can conduct hoisting operation conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to an assembled steel-concrete composite beam bridge and a construction method. Background Art

[0002] The assembled steel-concrete composite beam Baotong Bridge is a new type of bridge construction method. It uses prefabricated steel-concrete composite beam components and is quickly assembled on site. The superstructure of this bridge is composed of a combination of steel and concrete materials, which work together through shear connectors.

[0003] Chinese patent publication number CN109778660A discloses a steel bridge installed with prefabricated abutments, including prefabricated abutments, main beams, bridge decks, and steel pipe piles. The prefabricated abutments include support columns, the upper ends of the support columns have lateral support portions extending toward the land side; the lower ends of the support columns are fixed to connecting beams, the connecting beams are connected to the steel pipe piles and supported by the steel pipe piles; both ends of the main beams are respectively supported by steel pipe piles, and the bridge deck is arranged above the main beams and supported by the main beams.

[0004] In the above-mentioned prior art, the supporting effect of the concrete bridge deck is achieved by setting up a main beam, but no fine-tuning measures are set for the main beam. During the construction of the assembled bridge, there are strict requirements on 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 process of hoisting and adjusting the position of the main beam, it is easily affected by the wind and causes the main beam to shake, affecting the position adjustment of the main beam. Therefore, an assembled steel-concrete composite beam bridge and a construction method are needed to meet people's needs. Summary of the invention

[0005] The object of the present invention is to provide an assembled steel-concrete composite beam bridge and a construction method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application provides an assembled steel-concrete composite beam maintenance bridge, including a plurality of steel pipe piles and a main beam frame; a positioning seat is installed above the steel pipe pile, an I-beam load-bearing beam is slidably installed inside the positioning seat, a supporting structure and a positioning structure are installed on the I-beam load-bearing beam, the main beam frame is installed on the supporting structure, a plurality of U-shaped blocks are movably installed on the I-beam load-bearing beam, a reinforcement structure is installed on the U-shaped blocks, a roller frame is slidably installed on the supporting structure, and a fine-tuning structure is installed on the roller frame.

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

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

[0009] Preferably, the reinforcement structure includes a fixed diagonal brace, which is installed on one side of the U-shaped block. Movable sleeves are installed on the two fixed diagonal braces. The two movable sleeves are respectively sleeved on the corresponding two steel pipe piles. The same reinforcement rod is installed between two adjacent movable sleeves. A number of reinforcing inclined plates are installed on the I-beam load-bearing beam, and the reinforcing inclined plates are installed on the corresponding positioning seats.

[0010] Preferably, a T-shaped positioning block is movably installed below the U-shaped block, a positioning pin is movably installed inside the T-shaped positioning block, the positioning pin is installed below the I-beam, 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 block and is threadedly installed inside the I-beam, and a plurality of screw holes matching the fixing screw are provided inside the I-beam.

[0011] Preferably, the fine-tuning structure includes a plurality of pulleys, which are rotatably mounted inside a roller frame, and the roller frame is slidably mounted on the inner wall of a U-shaped support platform. A lifting hydraulic cylinder is mounted above the U-shaped support platform, and the output end of the lifting hydraulic cylinder passes through the U-shaped support platform and is mounted above the roller frame, and 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 screw rods are movably mounted on the push-pull hydraulic cylinder, the mounting screw rods are threadedly mounted inside the I-beam, a plurality of thread holes matching the mounting screw rods are opened inside the I-beam, 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, and mounting inclined plates are mounted on both sides of the U-shaped support platform.

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

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

[0015] A second aspect of the embodiments of the present application provides a method for constructing a prefabricated steel-concrete composite beam bridge, the method using the prefabricated steel-concrete composite beam bridge according to any of the above embodiments, comprising the following steps:

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

[0017] S2. Weld two fixed diagonal braces to the U-shaped block and sleeve the U-shaped block on the horizontal plate on the lower side of the I-shaped load-bearing beam. Then weld the other ends of the two fixed diagonal braces to two adjacent movable sleeves. Weld a reinforcement rod between the two movable sleeves. At this time, place a T-shaped positioning block between the two U-shaped blocks, and use a fixing screw to fix the position of the T-shaped positioning block and the U-shaped block to complete the installation of the support part.

[0018] S3, hoist the U-shaped support platform above the I-shaped load-bearing beam and insert the guide rod into the guide sliding hole, and at the same time make the pulley contact with the top of the I-shaped load-bearing beam, use the pulley and the lifting hydraulic cylinder to temporarily provide support for the U-shaped support platform, and then hoist the main beam frame above the two U-shaped support platforms and weld and fix them;

[0019] S4. If the distances between adjacent main beams are different, the push-pull plate can be opened to extend and retract the output end, and the U-shaped support platform can be pulled to move above the I-beam, thereby driving the main beam to move and fine-tune the position of the main beam;

[0020] S5. After fine-tuning the position of the main beam, control the lifting hydraulic cylinder to drive the U-shaped support platform down so that the U-shaped support platform contacts the surface of the L-shaped support seat and the I-beam. At this time, the contact position can be welded to fix the position of the U-shaped support platform and the main beam, completing the erection operation of the main beam. Finally, erect a horizontal steel frame above the main beam and lay the concrete bridge deck above the horizontal steel frame to realize the construction of the bridge to ensure smooth traffic.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) According to the present invention, during the construction of the bridge, the main beam frame can be welded to two U-shaped support platforms that have been erected, and the U-shaped support platforms can be used to provide support for the main beam frame. If the distances between two adjacent main beam frames are inconsistent, the U-shaped support platforms can be pushed and pulled by opening the push-pull hydraulic cylinder, so that the U-shaped support platforms can drive the main beam frame to move, and the position of the main beam frame can be fine-tuned without being affected by wind force. The fine-tuning process is more convenient and accurate, and the stability and safety of the main beam frame can be guaranteed at the same time. When the main beam frame is subsequently disassembled, the distance between them can also be adjusted to leave enough space for movement on both sides for the staff to perform lifting operations.

[0023] (2) When installing the I-beam, it can be slid into the corresponding T-shaped positioning hole. Then, the positioning screw can be passed through the I-beam and screwed into the inside of the T-shaped positioning hole to preliminarily locate and fix the position of the I-beam, ensuring that the I-beam can be accurately placed in the predetermined position during the installation process, providing safety for subsequent welding or permanent fixation.

[0024] (3) After the I-beam is installed, the U-shaped block can be put on the I-beam, and a fixed diagonal brace can be welded on one side of the U-shaped block and the movable sleeve. Then, the T-shaped positioning block can be used to fix the position of the U-shaped block on the I-beam to complete the installation of the fixed diagonal brace. The fixed diagonal brace serves as an additional supporting member, which can effectively prevent the structure from tilting or collapsing when subjected to external forces, thereby improving the scientificity and practicality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structural schematic diagram of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0026] Figure 2 A schematic diagram of the partial structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0027] Figure 3 A schematic diagram of an I-beam connection structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0028] Figure 4 A schematic diagram of a U-shaped block connection structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0029] Figure 5 A schematic diagram of a positioning screw structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0030] Figure 6 A schematic diagram of a T-shaped positioning block structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0031] Figure 7 A schematic diagram of a positioning seat structure of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0032] Figure 8 A schematic diagram of the side structure of a U-shaped support platform of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0033] Fig. 9 A schematic diagram of the internal structure of a U-shaped support platform of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0034] Fig.10 A schematic diagram of the position structure of a push-pull hydraulic cylinder of an assembled steel-concrete composite beam bridge and a construction method proposed by the present invention;

[0035] Fig.11 The present invention provides a schematic cross-sectional structure diagram of a U-shaped support platform for an assembled steel-concrete composite beam bridge and a construction method.

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

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1-11 According to a first aspect of the present invention, there is provided an assembled 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 pile 100, an I-shaped load-bearing beam 201 is slidably installed inside the positioning seat 200, a supporting structure and a positioning structure are installed on the I-shaped load-bearing beam 201, the main beam frame 101 is installed on the supporting structure, the supporting structure is used to support the main beam frame 101 and the bridge, and the positioning structure can be used to facilitate the installation of the supporting structure, a plurality of U-shaped blocks 300 are movably installed on the I-shaped load-bearing beam 201, a reinforcement structure is installed on the U-shaped block 300, and the reinforcement structure is used to reinforce the supporting structure and improve the supporting stability of the supporting structure, a roller frame 400 is slidably installed on the supporting structure, and a fine-tuning structure is installed on the roller frame 400, and the fine-tuning structure can fine-tune the erection position of the main beam frame 101.

[0039] Furthermore, the supporting structure includes a plurality of L-shaped support seats 202, and the plurality of L-shaped support seats 202 are evenly installed on both sides of the I-beam 201. A U-shaped support platform 203 is movably installed on the L-shaped support seat 202, and a welding plate 204 is installed above the U-shaped support platform 203. The main beam frame 101 is movably installed above the U-shaped support platform 203. The U-shaped support platform 203 can be used to provide support for the main beam frame 101, and the L-shaped support seat 202 and the I-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 provided inside the positioning seat 200. The I-beam load-bearing beam 201 is movably installed in the T-shaped positioning hole 205. A plurality of 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 threadedly installed in 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, so as to achieve preliminary positioning of the I-beam load-bearing beam 201.

[0041] Example 2: Figure 1-7 In order to improve the supporting stability of the steel pipe pile 100, a reinforcement structure is arranged on the U-shaped block 300, wherein the reinforcement structure includes a fixed diagonal brace 303, the fixed diagonal brace 303 is installed on one side of the U-shaped block 300, and movable sleeves 304 are installed on the two fixed diagonal braces 303, and the two movable sleeves 304 are respectively sleeved on the corresponding two steel pipe piles 100, and the same reinforcement rod 305 is installed between the two adjacent movable sleeves 304, and a plurality of 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 clamping 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 clamping block 300 and is threadedly installed inside the I-beam load-bearing beam 201, and a plurality of screw holes compatible with the fixing screw 307 are opened inside the I-beam load-bearing beam 201.

[0043] One end of the two fixed diagonal braces 303 is welded to the U-shaped block 300, and the U-shaped block 300 is sleeved on the horizontal plate near the bottom of the I-shaped load-bearing beam 201. The other ends of the two fixed diagonal braces 303 are respectively welded to two adjacent movable sleeves 304. After welding is completed, the T-shaped positioning block 301 is installed on the two positioning pins 302 and fixedly positioned by the fixing screw 307, which can be used to increase the supporting stability of the steel pipe pile 100. The remaining features are the same as those in Example 1.

[0044] Example 3: Figure 2-11 In order to facilitate fine-tuning the position of the main beam frame 101, a fine-tuning structure is arranged on the roller frame 400, wherein the fine-tuning structure includes a plurality of pulleys 401, and the pulleys 401 are rotatably installed inside the roller frame 400, and 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, and 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 201, and a plurality of mounting screw rods 404 are movably installed on the push-pull hydraulic cylinder 403. The mounting screw rods 404 are threadedly installed inside the I-beam 201. A plurality of thread holes matching the mounting screw rods 404 are opened inside the I-beam 201. A push-pull plate 405 is installed at the output end of the push-pull hydraulic cylinder 403, and the push-pull plate 405 is slidably installed inside the U-shaped support platform 203.

[0046] Mounting inclined plates 410 are installed on both sides of the U-shaped support platform 203, a T-shaped slide groove 406 is provided inside the U-shaped support platform 203, 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, a guide slide hole 408 is provided inside the L-shaped support seat 202, a guide rod 409 is movably installed in the guide slide hole 408, and 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 driven to move by opening the push-pull hydraulic cylinder 403, so that the placement position of the main beam frame 101 can be fine-tuned.

[0047] After adjustment, control the lifting hydraulic cylinder 402 to retract its output end, which can drive the U-shaped support platform 203 to descend. The descending U-shaped support platform 203 will contact the surface of the I-beam load-bearing beam 201 and the L-shaped support seat 202. The I-beam load-bearing beam 201 and the L-shaped support seat 202 are used 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. When the mounting inclined plate 410 is welded to the I-beam load-bearing beam 201, the position of the U-shaped support platform 203 can be completely fixed. The remaining features are the same as those in Example 1.

[0048] See also Figure 1-11 The second aspect of the present invention provides a method for constructing a prefabricated steel-concrete composite beam bridge, comprising the following steps:

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

[0050] S2, weld the two fixed diagonal braces 303 to the U-shaped block 300 and sleeve the U-shaped block 300 on the horizontal plate at the lower side of the I-shaped load-bearing beam 201, then weld the other ends of the two fixed diagonal braces 303 to two adjacent movable sleeves 304, weld the reinforcing rod 305 between the two movable sleeves 304, then place the T-shaped positioning block 301 between the two U-shaped blocks 300, and use the fixing screw 307 to fix the positions of the T-shaped positioning block 301 and the U-shaped block 300, and complete the installation of the support part;

[0051] S3, hoist the U-shaped support platform 203 above the I-shaped load-bearing beam 201 and insert the guide rod 409 into the guide slide hole 408, and at the same time make the pulley 401 contact with the top of the I-shaped load-bearing beam 201, use the pulley 401 and the lifting hydraulic cylinder 402 to temporarily provide support for the U-shaped support platform 203, and then hoist the main beam frame 101 above the two U-shaped support platforms 203 and weld them to fix;

[0052] S4. If the distances between adjacent main beams 101 are 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 201, thereby driving the main beam 101 to move and fine-tune the position of the main beam 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 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, completing the erection operation of the main beam frame 101. Finally, erect a horizontal steel frame above the main beam frame 101 and lay a concrete bridge deck above the horizontal steel frame to realize the construction of the bridge to ensure smooth passage.

[0054] The working principle is as follows: when in use, first put the movable sleeve 304 on the steel pipe pile 100, weld the positioning seat 200 to one end of the steel pipe pile 100, and then insert the steel pipe pile 100 at the designated location. When inserting, it is necessary to ensure that each positioning seat 200 faces the same direction. Then, hoist the positioning seat 200 and insert it from the T-shaped positioning hole 205 on the positioning seat 200, connect it to each positioning seat 200, align the connecting hole 206 with the threaded hole 208, and then insert the positioning screw 207 into the connecting hole 206 and screw it into the threaded hole 208.

[0055] By rotating the positioning screw 207 to check its descending degree, it can be judged whether the connecting hole 206 and the threaded hole 208 are aligned. If they are not aligned, the position of the I-beam 201 can be fine-tuned. The I-beam 201 can only move in a single direction due to the limitation of the T-shaped positioning hole 205, which can avoid deviation. After installing the positioning screw 207, the initial positioning of the I-beam 201 can be achieved. Then, the reinforcement inclined plate 306 is welded between the I-beam 201 and the positioning seat 200 in sequence to reinforce and fix the positioning seat 200 and the I-beam 201.

[0056] Then, one end of the two fixed diagonal braces 303 is welded to the U-shaped block 300, and the U-shaped block 300 is sleeved on the horizontal plate near the bottom of the I-shaped load-bearing beam 201, and the other ends of the two fixed diagonal braces 303 are respectively welded to two adjacent movable sleeves 304. After welding is completed, the T-shaped positioning block 301 is installed on the two positioning pins 302, and the T-shaped positioning block 301 will be located below the U-shaped block 300. At this time, the fixing screw 307 is passed through the corresponding holes of the T-shaped positioning block 301 and the U-shaped block 300 and screwed into the lower interior of the I-shaped load-bearing beam 201 by using a thread, so that the position of the U-shaped block 300 can be fixed.

[0057] A plurality of cross-slanting rods can be welded between two adjacent steel pipe piles 100 to increase stability. At this time, the L-shaped support seat 202 is welded to the I-shaped load-bearing beam 201 so that it is located between the corresponding two reinforcement inclined plates 306. The push-pull hydraulic cylinder 403 is placed above the I-shaped load-bearing beam 201, and the installation screw 404 is passed through the installation seat of the push-pull hydraulic cylinder 403 and screwed into the inside of the I-shaped load-bearing beam 201 to fix the position of the push-pull hydraulic cylinder 403. At this time, the U-shaped support platform 203 is hoisted above the push-pull hydraulic cylinder 403, and the U-shaped support platform 203 is controlled to descend and wrap the push-pull hydraulic cylinder 403. 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 lowering the U-shaped support platform 203, it can drive the guide rod 409 to insert into the guide slide hole 408, and make the pulley 401 contact with the top of the I-beam 201, and use the pulley 401 and the lifting hydraulic cylinder 402 to support the U-shaped support platform 203 and lift the U-shaped support platform 203.

[0058] Then the main beam frame 101 is hoisted above the corresponding two U-shaped support platforms 203, so that the two ends of the main beam frame 101 are respectively in contact with the corresponding two welding plates 204, and then the two ends of the main beam frame 101 are respectively welded to the two welding plates 204 and the U-shaped support platform 203. If the position of the main beam frame 101 is offset, the output end of the push-pull hydraulic cylinder 403 can be opened to extend and retract. During the extension of the output end of the push-pull hydraulic cylinder 403, the inner wall of the U-shaped support platform 203 will be pushed through the push-pull plate 405, driving 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 toward the direction of the push-pull hydraulic cylinder 403, and the T-shaped slider 407 can pull the U-shaped support platform 203 to move by cooperating with the T-shaped slide 406.

[0059] During the movement of the U-shaped support platform 203, the guide rod 409 can be driven to slide in the guide slide hole 408, thereby limiting the movement direction of the U-shaped support platform 203 and preventing the U-shaped support platform 203 from slipping off the top of the I-shaped load-bearing beam 201. The moving U-shaped support platform 203 can drive the roller frame 400 and the pulley 401 to move, so that the pulley 401 can roll on the top of the I-shaped load-bearing beam 201, thereby making the U-shaped support platform 203 move more smoothly. By adjusting the position of the U-shaped support platform 203, it can drive the main beam frame 101 to move, and then the placement position of the main beam frame 101 can be fine-tuned. After adjustment, the lifting hydraulic cylinder 402 is controlled to retract its output end, which can drive the U-shaped support platform 203 to descend. Conversely, when the output end of the lifting hydraulic cylinder 402 is extended, the U-shaped support platform 203 can be driven to rise.

[0060] The U-shaped support platform 203 can slide on the T-shaped slide block 407 through the T-shaped slide groove 406 during the lifting process, thereby avoiding interference between the U-shaped support platform 203 and the push-pull plate 405 during the lifting process. The continuously descending U-shaped support platform 203 will contact the surface of the I-shaped load-bearing beam 201 and the L-shaped support seat 202, and the I-shaped load-bearing beam 201 and the L-shaped support seat 202 provide support for the U-shaped support platform 203. At the same time, the U-shaped support platform 203 will drive the installation inclined plate 410 to contact the surface of the I-shaped load-bearing beam 201 during the descent process. At this time, the contact points between the U-shaped support platform 203 and the I-shaped load-bearing beam 201 and the L-shaped support seat 202 can be welded and fixed. After the installation inclined plate 410 is welded to the I-shaped load-bearing beam 201, the position of the U-shaped support platform 203 can be completely fixed.

[0061] When the main beam frame 101 is subsequently disassembled, the position of the main beam frame 101 can be adjusted by the cooperation of the lifting hydraulic cylinder 402 and the push-pull hydraulic cylinder 403, so that sufficient activity space can be left on the left and right of the main beam frame 101, which is convenient for the staff to perform bundling or lifting operations.

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

Claims

1. An assembled steel-concrete composite beam bridge, 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-shaped load-bearing beam (201) is slidably installed inside the positioning seat (200), a support structure and a positioning structure are installed on the I-shaped load-bearing beam (201), a main beam frame (101) is installed on the support structure, a plurality of U-shaped clamping blocks (300) are movably installed on the I-shaped load-bearing beam (201), a reinforcement structure is installed on the U-shaped clamping block (300), a roller frame (400) is slidably installed on the support structure, and a fine-tuning structure is installed on the roller frame (400).

2. The assembled steel-concrete composite beam bridge according to claim 1, characterized in that: The support structure comprises a plurality of L-shaped support seats (202), wherein the plurality of L-shaped support seats (202) are evenly installed on both sides of an I-shaped load-bearing beam (201), a U-shaped support platform (203) is movably installed on the L-shaped support seat (202), a welding plate (204) is installed above the U-shaped support platform (203), and a main beam frame (101) is movably installed above the U-shaped support platform (203).

3. The assembled steel-concrete composite beam bridge according to claim 1 is characterized in that: The positioning structure comprises a T-shaped positioning hole (205), the T-shaped positioning hole (205) is provided inside the positioning seat (200), an I-shaped load-bearing beam (201) is movably installed in the T-shaped positioning hole (205), a plurality of connecting holes (206) are provided inside the I-shaped 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), and one end of the positioning screw (207) is threadedly installed in the threaded hole (208).

4. The assembled steel-concrete composite beam bridge according to claim 1 is characterized in that: The reinforcement structure comprises a fixed diagonal brace (303), the fixed diagonal brace (303) is installed on one side of the U-shaped block (300), two fixed diagonal braces (303) are both installed with a movable sleeve (304), the two movable sleeves (304) are respectively sleeved on two corresponding steel pipe piles (100), a same reinforcement rod (305) is installed between two adjacent movable sleeves (304), a plurality of reinforcement inclined plates (306) are installed on the I-shaped load-bearing beam (201), and the reinforcement inclined plates (306) are installed on the corresponding positioning seats (200).

5. The assembled steel-concrete composite beam bridge according to claim 1 is characterized in that: A T-shaped positioning block (301) is movably mounted below the U-shaped clamping block (300), a positioning pin (302) is movably mounted inside the T-shaped positioning block (301), the positioning pin (302) is mounted below the I-shaped load-bearing beam (201), one end of a fixing screw (307) is movably mounted inside the T-shaped positioning block (301), the other end of the fixing screw (307) penetrates the T-shaped positioning block (301) and the U-shaped clamping block (300) and is threadedly mounted inside the I-shaped load-bearing beam (201), and a plurality of screw holes matching the fixing screw (307) are provided inside the I-shaped load-bearing beam (201).

6. The assembled steel-concrete composite beam bridge according to claim 1 is characterized in that: The fine-tuning structure comprises a plurality of pulleys (401), wherein the pulleys (401) are rotatably mounted inside a roller frame (400), and the roller frame (400) is slidably mounted on the inner wall of a U-shaped support platform (203). A lifting hydraulic cylinder (402) is mounted above the U-shaped support platform (203), and an output end of the lifting hydraulic cylinder (402) passes through the U-shaped support platform (203) and is mounted above the roller frame (400). A push-pull hydraulic cylinder (403) for pushing and pulling the U-shaped support platform (203) is mounted above the I-shaped load-bearing beam (201).

7. The assembled steel-concrete composite beam bridge according to claim 6 is characterized in that: A plurality of mounting screw rods (404) are movably mounted on the push-pull hydraulic cylinder (403), the mounting screw rods (404) are threadedly mounted inside the I-shaped load-bearing beam (201), a plurality of thread holes matching the mounting screw rods (404) are provided inside the I-shaped load-bearing beam (201), a push-pull plate (405) is mounted on the output end of the push-pull hydraulic cylinder (403), the push-pull plate (405) is slidably mounted inside the U-shaped support platform (203), and mounting inclined plates (410) are mounted on both sides of the U-shaped support platform (203).

8. The assembled steel-concrete composite beam bridge according to claim 7 is characterized in that: The U-shaped support platform (203) is provided with a T-shaped slide groove (406) inside which a T-shaped slider (407) is slidably installed. The T-shaped slider (407) is installed on one side of the push-pull plate (405).

9. The assembled steel-concrete composite beam bridge according to claim 2 is characterized in that: A guide sliding hole (408) is provided inside the L-shaped support seat (202), a guide rod (409) is movably installed in the guide sliding hole (408), and the guide rod (409) is installed below the U-shaped support platform (203).

10. A method for constructing a prefabricated steel-concrete composite beam bridge, characterized in that: The method uses the assembled steel-concrete composite beam maintenance bridge according to any one of claims 1 to 9, comprising the following steps: S1, sleeve the movable sleeve (304) on the steel pipe pile (100) and weld the positioning seat (200) on one end of the steel pipe pile, insert the steel pipe pile (100) at a designated location so that the T-shaped positioning holes (205) in the same row face the same direction, insert the I-shaped load-bearing beam (201) into each T-shaped positioning hole (205) at one time, pass the positioning screw (207) through the connecting hole (206) and screw it into the corresponding threaded hole (208), and complete the preliminary fixation of the I-shaped load-bearing beam (201); S2, welding two fixed diagonal braces (303) to the U-shaped block (300) and sleeve the U-shaped block (300) on the horizontal plate at the lower side of the I-shaped load-bearing beam (201), then welding the other ends of the two fixed diagonal braces (303) to two adjacent movable sleeves (304), welding a reinforcing rod (305) between the two movable sleeves (304), placing a T-shaped positioning block (301) between the two U-shaped blocks (300), and fixing the positions of the T-shaped positioning block (301) and the U-shaped block (300) with a fixing screw (307), and completing the installation of the support part; S3, hoisting the U-shaped support platform (203) above the I-shaped load-bearing beam (201) and inserting the guide rod (409) into the guide sliding hole (408), while making the pulley (401) contact the top of the I-shaped load-bearing beam (201), using the pulley (401) and the lifting hydraulic cylinder (402) to temporarily provide support for the U-shaped support platform (203), and then hoisting the main beam frame (101) above the two U-shaped support platforms (203) and welding and fixing them; S4. If the distances between adjacent main beams (101) are different, the push-pull plate (405) can be opened to extend and retract the output end, and the U-shaped support platform (203) can be pulled to move above the I-beam (201), thereby driving the main beam (101) to move and fine-tune the position of the main beam (101); S5. After the position of the main beam frame (101) is fine-tuned, the lifting hydraulic cylinder (402) is controlled 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-shaped 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), and the erection operation of the main beam frame (101) is completed. Finally, a horizontal steel frame is erected above the main beam frame (101) and a concrete bridge deck is laid above the horizontal steel frame to realize the construction of the bridge to ensure smooth passage.

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