Steel box girder splicing device and construction method

Abstract

The invention relates to the technical field of bridge engineering, in particular to a steel box girder splicing device and a construction method. Comprising a jig frame, a moving mechanism, a jacking mechanism and a web supporting plate, the jig frame comprises two symmetrically-arranged frame body structures, a notch is reserved between the two frame body structures, and the jig frame is used for supporting assembly of a steel box girder; the jacking mechanism is used for supporting the web supporting plate and adjusting the inclination angle of the web supporting plate, one end of the jacking mechanism is connected with the moving mechanism, and the other end of the jacking mechanism is connected with the web supporting plate; the moving mechanism is used for adjusting the relative position of the web supporting plate on the jig frame, and the moving mechanism is connected to the frame beam; the web supporting plates are used for supporting webs of the steel box girders when the steel box girders are assembled. According to the invention, a large floating crane or large gantry crane hoisting equipment is not needed to carry out tire unloading on the steel box girder, and the tire unloading operation of the steel box girder can be realized only through a simple bracket structure.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a steel box girder assembling device and a construction method. Background Art

[0002] In the field of modern bridge engineering technology, steel box girder structures have been widely used. Compared with traditional concrete structures, they can effectively give play to the advantages of steel tensile strength and concrete compressive strength, while realizing factory manufacturing to the greatest extent and improving economic and social benefits.

[0003] The steel box girder structure is generally welded from the upper flange plate, the bottom plate and the web plate units. In coastal areas, the steel box girder structure is processed as a whole at the base and needs to be transported to the site for installation by large floating cranes and transport ships. The transportation cost of large floating cranes and transport ships is high, and the lifting is cumbersome. In inland areas, the assembly plant needs to use large gantry cranes to carry out the lowering work, which leads to a large number of lifting and hoisting of large components and a greater safety risk. After the steel box girder structure is assembled, the bottom plate and the web plate are fixedly connected, and there is a shear force between the two, which causes the steel box girder to deform due to the shear force during long-term transportation or use, affecting its function and aesthetics. To this end, we propose a steel box girder assembly device and construction method to solve the above problems. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a steel box girder assembly device and construction method. Compared with the traditional steel box girder lowering method, the present invention does not require large floating cranes or large gantry crane lifting equipment to lower the steel box girder, but can achieve the steel box girder lowering operation only through a simple support structure.

[0005] The technical solution of the present invention is: a steel box girder assembly device, comprising:

[0006] The tire frame is composed of two symmetrically arranged frame structures with a gap in the middle of the two frame structures. The tire frame includes a frame beam, a support column, a bottom plate tooth plate and an embedded part. The embedded part is fixed on the ground and connected to the support column above; the support column is connected to the frame beam above; the frame beam is connected to the bottom plate tooth plate above;

[0007] A moving mechanism, a pressing mechanism and a web support plate, wherein the pressing mechanism is used to support the web support plate and adjust the inclination angle of the web support plate, one end of which is connected to the moving mechanism, and the other end is connected to the web support plate; the moving mechanism is used to adjust the relative position of the web support plate on the tire frame, and the moving mechanism is connected to the frame beam; the web support plate is used to support the web of the steel box girder when the steel box girder is assembled.

[0008] According to a steel box girder assembly device provided by the present invention, the width of the notch is smaller than the width of the bottom plate of the steel box girder to be assembled, and larger than the width of the large hydraulic cylinder.

[0009] According to a steel box girder assembly device provided by the present invention, the height of the support column is greater than the height of the steel box girder transport vehicle, and the spacing between the two rows of support columns closest to the notch is greater than the width of the steel box girder transport vehicle.

[0010] According to a steel box girder assembly device provided by the present invention, the moving mechanism includes a connecting frame, a driving motor, a transmission threaded rod, a sliding rod and a top pressure support plate, the connecting frame is connected to the frame beam; the driving motor is fixedly connected to the connecting frame; the transmission threaded rod is threadedly connected to the top pressure support plate, one end of which is connected to the output end of the driving motor, and the other end passes through the support plate and is rotatably connected to the connecting frame; the two ends of the sliding rod are respectively fixed to the connecting frame; the support plate can slide on the sliding rod.

[0011] According to a steel box girder assembly device provided by the present invention, the jacking mechanism includes a support rod, a first hydraulic rod and a second hydraulic rod, one end of the support rod is rotatably connected to the jacking support plate, and the other end is rotatably connected to the web support plate; one end of the first hydraulic rod is connected to the jacking support plate, and the other end is connected to the support rod; one end of the second hydraulic rod is connected to the web support plate, and the other end is connected to the support rod.

[0012] According to a steel box girder assembly device provided by the present invention, a web tooth plate is also connected to the web support plate.

[0013] Based on the same concept, the present invention also provides a construction method for assembling a steel box girder, which is applicable to any of the above-mentioned steel box girder assembly devices, and comprises the following steps:

[0014] Install the tire frame: ensure that the bearing capacity meets the requirements and construct the tire frame foundation;

[0015] Install the bottom plate of the steel box beam: start the driving motor to make the top pressure support plate slide with the web support plate in the direction away from the notch, and drive the web support plate to be in a horizontal state; drive the crane to hoist the bottom plate of the steel box beam onto the bottom plate tooth plate of the tire frame;

[0016] Installing the web of the steel box girder: driving the crane to hoist the web of the steel box girder onto the web support plate, and driving the web support plate to be in an inclined state to roughly adjust the inclination angle of the web of the steel box girder;

[0017] Assembling the steel box girder: starting the driving motor to move the top pressure support plate with the web support plate in the direction close to the notch, so that one end of the steel box girder web located on both sides of the tire frame is respectively against the two ends of the steel box girder bottom plate, and the steel box girder bottom plate and the steel box girder web are preliminarily connected;

[0018] Adjusting the angle: adjusting the pressing mechanism and controlling the position and angle of the web teeth, so that the angle between the web of the steel box beam and the bottom plate of the steel box beam meets the design angle, and the web of the steel box beam and the bottom plate of the steel box beam are fixedly connected according to the adjusted angle;

[0019] Install the upper flange plate of the steel box girder: drive the crane to hoist the upper flange plate of the steel box girder onto the web plate of the steel box girder;

[0020] Steel box girder lowering tire: lift the large hydraulic cylinder to lift the assembled steel box girder upward and away from the tire frame, drive the steel box girder transport vehicle to move the steel box girder transport vehicle away from the tire frame, and retract the large hydraulic cylinder to make the assembled steel box girder rest on the top of the steel box girder transport vehicle.

[0021] According to a construction method for assembling a steel box girder provided by the present invention, in the step of installing the tire frame, according to the manufacturing line shape of the steel box girder, the bottom plate teeth of different heights are welded above the frame beam to control the bottom plate elevation of the steel box girder.

[0022] According to a construction method for assembling a steel box girder provided by the present invention, when the web support plate is in a horizontal state, the first hydraulic rod and the second hydraulic rod need to be driven to extend; when the web support plate is in an inclined state, the first hydraulic rod and the second hydraulic rod need to be driven to contract.

[0023] According to a construction method for assembling a steel box girder provided by the present invention, in the angle adjustment step, the position and angle of the web tooth plate are controlled to adjust the angle between the web of the steel box girder and the web support plate.

[0024] The advantages of the present invention are:

[0025] 1. Compared with the traditional method of lowering the steel box girder, the present invention does not require large floating cranes or large gantry cranes to lower the steel box girder, but only uses a simple support structure to achieve the lowering operation of the steel box girder;

[0026] 2. The present invention is highly safe: the steel box beam unit components used in the present invention are processed at the base and transported to the construction site by car for assembly, which reduces the risks brought by the transportation of super-large components. At the same time, a steel box beam transport vehicle is used for unloading the steel beam, and the gantry crane has a small tonnage, which avoids multiple large-segment steel beam hoisting work and ensures safety during the construction process;

[0027] 3. The present invention has good economic efficiency: compared with the traditional steel box girder assembly method, the present invention adopts the production mode of "unit component back-field modular production + on-site mobile factory rapid assembly", which reduces the transportation of large components, reduces transportation costs and the investment in large gantry equipment, improves the efficiency of steel box girder installation, shortens the construction period, facilitates construction, and has significant economic benefits;

[0028] 4. The present invention has a wide range of applications: the moving mechanism of the present invention can adjust the spacing of the web support plates to be suitable for the assembly and manufacture of steel box girders with different spans;

[0029] 5. The present invention has high adaptability: the top pressing mechanism of the present invention can adjust the inclination angle of the web support plate to be suitable for the assembly and manufacture of steel box girders with different structural forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the steel box girder assembly device of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the tire frame of the present invention;

[0032] Figure 3 It is the structural schematic diagram of the steel box girder;

[0033] Figure 4 It is a structural schematic diagram of the mobile mechanism of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the top pressing mechanism and the web support plate of the present invention;

[0035] Among them: 1- tire frame; 101- frame beam; 102- support column; 103- bottom plate tooth plate; 104- embedded parts; 105- notch; 2- moving mechanism; 201- connecting frame; 202- driving motor; 203- transmission threaded rod; 204- sliding rod; 205- top pressure support plate; 3- top pressure mechanism; 4- web support plate; 401- web tooth plate. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0039] The present invention relates to a steel box girder assembling device and a construction method. Compared with the traditional steel box girder lowering method, the present invention does not require large floating cranes or large gantry cranes to lower the steel box girder, but can achieve the steel box girder lowering operation only through a simple support structure.

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0041] A steel box girder assembly device, specifically, Figure 1 , 2As shown, it includes a tire frame 1, a moving mechanism 2, a pressing mechanism 3 and a web support plate 4. The tire frame 1 is two symmetrically arranged frame structures, and a gap 105 is left between the two frame structures. The tire frame 1 includes a frame beam 101, a support column 102, a bottom plate tooth plate 103 and an embedded part 104. The embedded part 104 is fixed on the ground, and the upper part thereof is connected to the support column 102; the upper part of the support column 102 is connected to the frame beam 101; the upper part of the frame beam 101 is connected to the bottom plate tooth plate 103; the pressing mechanism 3 is used to support the web support plate 4 and adjust the inclination angle of the web support plate 4, one end of which is connected to the moving mechanism 2, and the other end is connected to the web support plate 4; the moving mechanism 2 is used to adjust the upper relative position of the web support plate 4 on the tire frame 1, and the moving mechanism 2 is connected to the frame beam 101; the web support plate 4 is used to support the web of the steel box beam when the steel box beam is assembled.

[0042] During actual assembly, the tire frame 1 is used to bear the overall weight of the steel box girder during assembly, wherein bottom plate teeth 103 of different heights can be installed to control the elevation of the bottom plate of the steel box girder, thereby controlling the overall line shape of the steel box girder; the web support plate 4 is used to support the web of the steel box girder, and the top pressing mechanism 3 controls the inclination angle of the web support plate 4 by adjusting the inclination angle of the web support plate 4, so that the angle between the web of the steel box girder and the bottom plate meets the design angle; the moving mechanism 2 controls the distance between the web support plates 4 located on both sides of the tire frame to adapt to steel box girders of different sizes, thereby improving the adaptability of the steel box girder assembly device.

[0043] In some embodiments, Figure 1 , 2 As shown, the above-mentioned notch 105 is optimized. In this embodiment, the width of the notch 105 is smaller than the bottom plate width of the steel box girder to be assembled, and larger than the width of the large hydraulic cylinder.

[0044] When the steel box beam is assembled, the width of the notch 105 is smaller than the bottom plate width of the steel box beam to be assembled, so that the bottom plate teeth 103 located on both sides of the tire frame 1 can jointly support the bottom plate of the steel box beam, thereby preventing the bottom plate of the steel box beam from overturning during the crane hoisting;

[0045] After the steel box girder is assembled, the width of the notch 105 is greater than the width of the large hydraulic cylinder, which facilitates the large hydraulic cylinder to lift the assembled steel box girder away from the support of the tire frame 1, and then transport the assembled steel box girder to the construction site by a steel box girder transport vehicle.

[0046] In some embodiments, Figure 1 , 2 As shown, the support column 102 is optimized. In this embodiment, the height of the support column 102 is greater than the height of the steel box girder transport vehicle, and the distance between the two rows of support columns 102 closest to the gap 105 is greater than the width of the steel box girder transport vehicle.

[0047] In fact, the space between the two rows of support columns 102 closest to the gap 105 is sufficient to accommodate the steel box girder transport vehicle entering and exiting the bottom of the tire frame 1, so that after the assembly of the steel box girder is completed, the steel box girder transport vehicle enters the bottom of the tire frame 1 and transports the steel box girder out of the processing site.

[0048] In some embodiments, Figure 4 As shown, the moving mechanism 2 is optimized. In this embodiment, the moving mechanism 2 includes a connecting frame 201, a driving motor 202, a transmission threaded rod 203, a sliding rod 204 and a top pressure support plate 205. The connecting frame 201 is connected to the frame beam 101; the driving motor 202 is fixedly connected to the connecting frame 201; the transmission threaded rod 203 is threadedly connected to the top pressure support plate 205, one end of which is connected to the output end of the driving motor 202, and the other end passes through the support plate 205 and is rotatably connected to the frame 201; the two ends of the sliding rod 204 are respectively fixed to the connecting frame 201; the support plate 205 can slide on the sliding rod 204.

[0049] During actual operation, after the driving motor 202 is started, its output end will drive the transmission threaded rod 203 to rotate. Since the top pressure support plate 205 is connected to the transmission threaded rod 203 through threads, the top pressure support plate 205 will move along the axial direction of the transmission threaded rod 203, and the sliding rod 204 provides support for the movement of the top pressure support plate 205.

[0050] When the crane hoists the web of the steel box girder on the web support plate 4, the driving motor 202 drives the top pressure support plate 205 to move in a direction away from the notch 105, thereby expanding the spacing between the web support plates 4 on both sides of the tire frame, making it easier to hoist the web of the steel box girder;

[0051] When the web of the steel box girder needs to be connected to the bottom plate of the steel box girder, the driving motor 202 drives the top pressure support plate 205 to move in the direction close to the notch 105, thereby reducing the spacing between the web support plates 4 located on both sides of the tire frame, making it easier to connect the web of the steel box girder to the bottom plate of the steel box girder.

[0052] In some embodiments, Figure 5 As shown, the jacking mechanism 3 is optimized. In this embodiment, the jacking mechanism 3 includes a support rod 301, a first hydraulic rod 302 and a second hydraulic rod 303. One end of the support rod 301 is rotatably connected to the jacking support plate 205, and the other end is rotatably connected to the web support plate 4; one end of the first hydraulic rod 302 is connected to the jacking support plate 205, and the other end is connected to the support rod 301; one end of the second hydraulic rod 303 is connected to the web support plate 4, and the other end is connected to the support rod 301.

[0053] During actual operation, when the first hydraulic rod 302 contracts, the angle between the support rod 301 and the top pressure support plate 205 can be reduced, and when the first hydraulic rod 302 extends, the angle between the support rod 301 and the top pressure support plate 205 can be increased; when the second hydraulic rod 303 contracts, the angle between the support rod 301 and the web support plate 4 can be reduced, and when the second hydraulic rod 303 extends, the angle between the support rod 301 and the web support plate 4 can be increased; the first hydraulic rod 302 and the second hydraulic rod 303 work together to accurately control the inclination angle of the web support plate 4.

[0054] When the crane hoists the web of the steel box girder on the web support plate 4, the first hydraulic rod 302 and the second hydraulic rod 303 are controlled to extend so that the web support plate 4 is in a horizontal state, so that the web of the steel box girder can stably fall on the web support plate 4;

[0055] When it is necessary to connect the web of the steel box girder with the bottom plate of the steel box girder, the first hydraulic rod 302 and the second hydraulic rod 303 are controlled to contract, so that the web support plate 4 is in an inclined state, so that one end of the web of the steel box girder located on both sides of the tire frame 1 is respectively in contact with the two ends of the bottom plate of the steel box girder, so as to facilitate the subsequent connection of the web of the steel box girder with the bottom plate of the steel box girder.

[0056] In some embodiments, Figure 5 As shown, the web support plate 4 is optimized, and in this embodiment, a web tooth plate 401 is also connected to the web support plate 4.

[0057] In actual operation, the angle between the web of the steel box girder and the web support plate 4 can be controlled by adjusting the position and angle of the web tooth plate 401, so as to control the inclination of the web of the steel box girder after the inclination of the web support plate 4 is fixed.

[0058] A construction method applicable to any of the above-mentioned steel box girder assembly devices, specifically, as follows:

[0059] Install the tire frame 1: ensure that the bearing capacity meets the requirements, construct the foundation of the tire frame 1, first install multiple embedded parts 104 on the ground, preferably, divide the multiple embedded parts 104 into two parts, and the spacing between the parts is greater than the width of the steel box girder transport vehicle; then connect multiple support columns 102 and multiple embedded parts 104 one by one, preferably, the height of the support column 102 is greater than the height of the steel box girder transport vehicle; then connect the frame beam 101 above the support column 102, and finally, according to the manufacturing line shape of the steel box girder, weld bottom plate teeth 103 of different heights above the frame beam 101 to control the bottom plate elevation of the steel box girder. Preferably, the spacing between the bottom plate teeth 103 closest to the two sides of the notch 105 is less than the bottom plate width of the steel box girder to be assembled, and greater than the width of the large hydraulic cylinder;

[0060] Install the bottom plate of the steel box beam: start the driving motor 202 to make the top pressure support plate 205 slide on the sliding rod 204 in the direction away from the notch 105, control the first hydraulic rod 302 and the second hydraulic rod 303 to extend, so that the web support plate 4 is in a horizontal state; drive the crane to hoist the bottom plate of the steel box beam onto the bottom plate tooth plate 103 of the tire frame 1;

[0061] Install the web of the steel box girder: drive the crane to hoist the web of the steel box girder onto the web support plate 4, control the first hydraulic rod 302 and the second hydraulic rod 303 to contract, so that the web support plate 4 is inclined, and the inclination angle of the web of the steel box girder is close to the design angle;

[0062] Assembling the steel box girder: starting the driving motor 202, so that the web support plate 4 moves on the slide bar 204 in the direction close to the notch 105, so that one end of the steel box girder web located on both sides of the tire frame 1 is respectively against the two ends of the steel box girder bottom plate, and the steel box girder bottom plate and the steel box girder web are preliminarily connected;

[0063] Adjusting the angle: repeatedly adjusting the extension and retraction of the first hydraulic rod 302 and the second hydraulic rod 303, coordinating with the position and angle of the web plate tooth plate 401, so that the angle between the web plate of the steel box beam and the bottom plate of the steel box beam meets the design angle, and the web plate of the steel box beam and the bottom plate of the steel box beam are fixedly connected according to the adjusted angle;

[0064] Install the upper flange plate of the steel box girder: drive the crane to install the upper flange plate of the steel box girder on the web of the steel box girder, adjust the pressure of the upper flange plate on the web and bottom plate of the steel box girder, and fix the upper flange plate of the steel box girder to the web;

[0065] Lowering the steel box girder: Lifting the large hydraulic cylinder to lift the assembled steel box girder upward and away from the tire frame 1, driving the steel box girder transport vehicle to move the steel box girder transport vehicle away from the tire frame 1, and retracting the large hydraulic cylinder to make the assembled steel box girder rest against the top of the steel box girder transport vehicle.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A steel box girder assembly device, characterized in that: include: A tire frame (1), wherein the tire frame (1) is two symmetrically arranged frame structures, a gap (105) is left between the two frame structures, and the tire frame (1) comprises a frame beam (101), a support column (102), a bottom plate tooth plate (103) and an embedded part (104), wherein the embedded part (104) is fixed on the ground and connected to the support column (102) at its top; the support column (102) is connected to the frame beam (101) at its top; and the frame beam (101) is connected to the bottom plate tooth plate (103) at its top; A moving mechanism (2), a pressing mechanism (3) and a web support plate (4); the pressing mechanism (3) is used to support the web support plate (4) and adjust the inclination angle of the web support plate (4); one end of the pressing mechanism (3) is connected to the moving mechanism (2), and the other end is connected to the web support plate (4); the moving mechanism (2) is used to adjust the relative position of the web support plate (4) on the tire frame (1); the moving mechanism (2) is connected to the frame beam (101); the web support plate (4) is used to support the web of the steel box beam when the steel box beam is assembled.

2. A steel box girder assembly device according to claim 1, characterized in that: The width of the notch (105) is smaller than the width of the bottom plate of the steel box beam to be assembled, and larger than the width of the large hydraulic cylinder.

3. A steel box girder assembly device according to claim 1, characterized in that: The height of the support column (102) is greater than the height of the steel box beam transport vehicle, and the distance between the two rows of support columns (102) closest to the notch (105) is greater than the width of the steel box beam transport vehicle.

4. A steel box girder assembly device according to claim 1, characterized in that: The moving mechanism (2) comprises a connecting frame (201), a driving motor (202), a transmission threaded rod (203), a sliding rod (204) and a top-pressure support plate (205); the connecting frame (201) is connected to the frame beam (101); the driving motor (202) is fixedly connected to the connecting frame (201); the transmission threaded rod (203) is threadedly connected to the top-pressure support plate (205), one end of which is connected to the output end of the driving motor (202), and the other end passes through the support plate (205) and is rotatably connected to the connecting frame (201); the two ends of the sliding rod (204) are respectively fixed to the connecting frame (201); and the support plate (205) can slide on the sliding rod (204).

5. The steel box girder assembly device according to claim 1, characterized in that: The pressing mechanism (3) comprises a support rod (301), a first hydraulic rod (302) and a second hydraulic rod (303); one end of the support rod (301) is rotatably connected to the pressing support plate (205), and the other end is rotatably connected to the web support plate (4); one end of the first hydraulic rod (302) is connected to the pressing support plate (205), and the other end is connected to the support rod (301); one end of the second hydraulic rod (303) is connected to the web support plate (4), and the other end is connected to the support rod (301).

6. A steel box girder assembly device according to claim 1 or 5, characterized in that: The web support plate (4) is also connected to a web tooth plate (401).

7. A construction method for assembling a steel box girder, characterized in that: The construction method is applicable to a steel box girder assembly device as described in any one of claims 1 to 6, comprising the following steps: Installing the tire frame (1): ensuring that the bearing capacity meets the requirements, and constructing the foundation of the tire frame (1); Installing the bottom plate of the steel box beam: starting the driving motor (202) so that the top pressure support plate (205) and the web support plate (4) slide in a direction away from the notch (105), driving the web support plate (4) to be in a horizontal state; driving the crane to hoist the bottom plate of the steel box beam onto the bottom plate tooth plate (103) of the tire frame (1); Installing the web of the steel box beam: driving the crane to hoist the web of the steel box beam onto the web support plate (4), and driving the web support plate (4) to be in an inclined state to roughly adjust the inclination angle of the web of the steel box beam; Assembling the steel box girder: starting the driving motor (202) to move the top pressure support plate (205) with the web support plate (4) in a direction close to the notch (105), so that one end of the steel box girder web located on both sides of the tire frame (1) is respectively against the two ends of the steel box girder bottom plate, and the steel box girder bottom plate and the steel box girder web are preliminarily connected; Adjusting the angle: adjusting the pressing mechanism (3) and controlling the position and angle of the web tooth plate (401) so that the angle between the web of the steel box beam and the bottom plate of the steel box beam meets the design angle, and the web of the steel box beam and the bottom plate of the steel box beam are fixedly connected according to the adjusted angle; Install the upper flange plate of the steel box girder: drive the crane to hoist the upper flange plate of the steel box girder onto the web plate of the steel box girder; Lowering the steel box girder: lifting the large hydraulic cylinder to lift the assembled steel box girder upward and away from the tire frame (1), driving the steel box girder transport vehicle to move the steel box girder transport vehicle away from the tire frame (1), and retracting the large hydraulic cylinder to make the assembled steel box girder rest against the top of the steel box girder transport vehicle.

8. A construction method for assembling a steel box girder according to claim 7, characterized in that: In the step of installing the tire frame (1), according to the manufacturing line shape of the steel box beam, the bottom plate teeth (103) of different heights are welded above the frame beam (101) to control the bottom plate elevation of the steel box beam.

9. A construction method for assembling a steel box girder according to claim 7, characterized in that: When the web support plate (4) is in a horizontal state, the first hydraulic rod (302) and the second hydraulic rod (303) need to be driven to extend; when the web support plate (4) is in an inclined state, the first hydraulic rod (302) and the second hydraulic rod (303) need to be driven to contract.

10. A construction method for assembling a steel box girder according to claim 7, characterized in that: In the angle adjustment step, the position and angle of the web tooth plate (401) are controlled to adjust the angle between the web of the steel box beam and the web support plate (4).

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