Modular high-strength steel structure trestle and construction method thereof

Abstract

The invention discloses a modular high-strength steel structure trestle and a construction method thereof, and relates to the field of steel structure trestles, the modular high-strength steel structure trestle comprises two supporting plates and supporting columns arranged on the surfaces of the supporting plates, prefabricated bridge frames are fixed to the surfaces of the supporting columns, supporting units are arranged on the side faces of the supporting columns, and the number of the supporting plates and the number of the supporting columns are both two. The two supporting columns are symmetrically arranged on the two sides of the prefabricated bridge frame, the prefabricated bridge frame is connected with the supporting plate through the supporting unit, and the supporting column is connected with the other supporting column through the supporting unit. By means of the supporting plates, the supporting columns and the prefabricated bridge frame, the steel structure trestle can be installed in a modularized mode, so that the trestle has higher flexibility and can be adjusted and changed according to requirements, meanwhile, if dismantling or moving is needed in the future, dismantling of the modularized structure is relatively simple, meanwhile, all components can be manufactured in advance through the modularized design, and the construction cost is reduced. Only assembling is needed on site, the construction period is remarkably shortened, and interference to the surrounding environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure trestles, in particular to a modular high-strength steel structure trestles and a construction method thereof. Background Art

[0002] A trestle is a temporary bridge structure used for loading and unloading goods or passengers, or for construction site traffic, machinery layout and overhead operations. It is divided into wooden trestle and steel trestle according to the materials used, and is widely used in stations, ports, mines or factories. The trestle in the prior art is inconvenient to install when in use, which not only takes time and effort to install the trestle, affecting the working speed, but also has poor structural stability and is prone to structural fractures due to vibration and impact. To this end, we provide a modular high-strength steel structure trestle and its construction method to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a modular high-strength steel structure trestle and a construction method thereof, which solves the problems that the installation of the existing steel structure trestle is time-consuming, the trestle structure is poor in stability, and the structure is prone to fracture when subjected to vibration and impact.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a modular high-strength steel structure trestle, comprising a support plate and a support column arranged on the surface of the support plate, a prefabricated bridge frame is fixed on the surface of the support column, a support unit is arranged on the side of the support column, the support plate and the support column each have two and are symmetrically arranged on both sides of the prefabricated bridge frame, the prefabricated bridge frame is connected to the support plate through the support unit, and the support column is connected to another support column through the support unit; A first fixing groove is provided on the surface of the support plate, the support unit comprises a first connecting rod and a second connecting rod, the lower end of the second connecting rod is clamped in the first fixing groove, a first groove corresponding to the second connecting rod is provided on the lower surface of the prefabricated bridge frame, and the upper end of the second connecting rod is clamped in the first groove; The support column comprises a fixing member, a second fixing bolt and a second fixing groove, one end of the first connecting rod is clamped in the second fixing groove, and the first connecting rod is fixed to the surface of the support column by the second fixing bolt, a second groove corresponding to the first connecting rod is formed on the lower surface of the support column, and the upper end of the first connecting rod is clamped in the second groove; The surface of the support unit is provided with a fixing component and a connecting component, and the second connecting rod is fixed to the surface of the support plate through the fixing component.

[0005] Furthermore, the prefabricated bridge frame is clamped on the surface of the support column, and the prefabricated bridge frame is fixed on the surface of the support column through a fixing piece, the support column is clamped on the surface of the support plate, and the support column is fixed on the surface of the support plate through a first fixing bolt, there are two first connecting rods and two second connecting rods, both are arranged on the side of the support column, and the first connecting rod is connected to another first connecting rod through a connecting assembly.

[0006] Furthermore, the fixing assembly includes a first knob and a first threaded rod, a threaded tube, a pushing block and a fixing rod arranged on the side of the first knob, a first transmission compartment is opened inside the second connecting rod, the first knob is arranged on the surface of the second connecting rod, the upper end of the first threaded rod is fixed to the lower surface of the first knob, the lower end of the first threaded rod passes through the first transmission compartment through a bearing, the threaded tube is threadedly connected to the surface of the first threaded rod, and the pushing block is fixed to the lower end of the threaded tube.

[0007] Furthermore, the fixing rod is inserted into the first transmission warehouse, and the fixing rod and the pushing block are perpendicular to each other, a spring is sleeved on the surface of the fixing rod, a limiting groove is provided on the surface of the first fixing groove, one end of the fixing rod is clamped in the limiting groove, there are two fixing rods and springs, and they are symmetrically arranged on both sides of the pushing block, a slider is fixed to the side of the threaded tube, a sliding groove is provided on the surface of the first transmission warehouse, the slider is slidably connected in the sliding groove, the threaded tube is movably connected in the first transmission warehouse through the slider and the sliding groove, there are two sliders and sliding grooves, and they are symmetrically arranged on both sides of the threaded tube.

[0008] Furthermore, the connecting assembly includes a shell and a second transmission compartment opened inside the shell, and the second transmission compartment is also provided with a first bevel gear, a rotating shaft, a second bevel gear, a second threaded rod, a third threaded rod, a threaded cap and a connecting plate. A second knob is provided on the surface of the shell, and the first bevel gear is fixed to the lower surface of the second knob through a rotating shaft and a bearing, and the second bevel gear is fixed to the surface of the rotating shaft, and the first bevel gear is meshed with the second bevel gear.

[0009] Furthermore, one end of the second threaded rod is fixed to one end of the rotating shaft, and the other end of the second threaded rod is rotatably connected to the inner wall of the second transmission warehouse through a bearing, one end of the third threaded rod is fixed to the other end of the rotating shaft, and the other end of the third threaded rod is rotatably connected to the inner wall of the second transmission warehouse through a bearing, the thread directions of the second threaded rod and the third threaded rod are opposite, the threaded nut is threadedly connected to the surface of the second threaded rod, the connecting plate is fixed to the surface of the threaded nut, the side of the connecting plate is rotatably connected with a fixed plate through a rotating shaft and a bearing, and the surface of the fixed plate is provided with connecting grooves corresponding to the first connecting rod and the second connecting rod.

[0010] Furthermore, the construction method of the modular high-strength steel structure trestle is as follows: First, place the support plate in the construction area, insert the lower end of the support column into the surface of the support plate, and fix it with the first fixing bolt, then overlap the prefabricated bridge frame on the surface of the support column, and fix the prefabricated bridge frame on the surface of the support column with the fixing piece, then clamp one end of the first connecting rod in the second fixing groove, and clamp the other end in the second groove opened on the lower surface of the support column, and fix it with the second fixing bolt, then clamp one end of the second connecting rod in the first fixing groove, and clamp the other end in the first groove opened on the lower surface of the prefabricated bridge frame, and fix it with the fixing assembly, and after the fixing is completed, fix the two first connecting rods and the two second connecting rods respectively through the connecting assembly; When the second connecting rod needs to be fixed, it is only necessary to turn the first knob to drive the first threaded rod to rotate, the first threaded rod drives the threaded tube to move, and the threaded tube drives the pushing block fixed at one end thereof to move. Since the pushing block and the fixed rod surfaces are both provided with inclined surfaces, all the pushing blocks can push the fixed rods on both sides to move synchronously during the movement process. When one end of the fixed rod is engaged in the limit groove, the knob can be stopped from being turned. When the two first connecting rods need to be connected and fixed, it is only necessary to place the shell above the first connecting rod, and then turn the second knob to drive the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the rotating shaft and the second threaded rod and the third threaded rod fixed at both ends of the rotating shaft to rotate synchronously, the second threaded rod and the third threaded rod drive the threaded cap to move, the threaded cap drives the connecting plate fixed on its surface to move, thereby driving the fixing plate connected to the side of the connecting plate to move, and then the first connecting rod is clamped in the connecting groove on the surface of the fixing plate.

[0011] Compared with the prior art, the modular high-strength steel structure trestle and its construction method have the following beneficial effects: 1. The present invention can modularly install the steel structure trestle through support plates, support columns and prefabricated bridge frames, so that the trestle has greater flexibility and can be adjusted and modified according to needs. At the same time, if it needs to be dismantled or moved in the future, the disassembly of the modular structure is relatively simple. At the same time, the modular design allows each component to be pre-manufactured and only needs to be assembled on site, which significantly shortens the construction period and reduces interference with the surrounding environment.

[0012] 2. Through the joint action of the first connecting rod and the second connecting rod, the present invention enables the prefabricated bridge frame, support columns and support plates to form a stable support system, thereby enhancing the strength of the overall structure, improving the bending and shear resistance, effectively dispersing the load applied to the bridge frame and the support columns, and reducing the impact of concentrated force on a single component, thereby improving safety. At the same time, through the multiple connection points of the first connecting rod and the second connecting rod, it is ensured that the bridge frame remains stable during use and will not be displaced or tilted.

[0013] 3. The present invention can connect the two first connecting rods and the two second connecting rods respectively through the connecting assembly, so that the interaction between the various components is closer, and the overall strength is further improved. The connecting assembly can make the first connecting rod and the second connecting rod share the load, ensuring the uniform distribution of the load in the overall structure, reducing local stress concentration, and extending the service life. It effectively improves the stress characteristics of the bridge under dynamic loads and enhances seismic resistance and stability.

[0014] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the support column in the present invention; Figure 4 It is a structural schematic diagram of the support unit of the present invention; Figure 5 It is a schematic diagram of the structure of the fixing component in the present invention; Figure 6 It is a schematic diagram of the structure of the connection component in the present invention.

[0016] In the figure: 1. Support plate; 101. First fixing bolt; 102. First fixing groove; 103. Limiting groove; 2. Support column; 201. Fixing piece; 202. Second fixing bolt; 203. Second fixing groove; 3. Prefabricated bridge; 4. Support unit; 401. First connecting rod; 402. Second connecting rod; 403. First transmission compartment; 5. Fixing assembly; 501. First knob; 502. First threaded rod; 503. Threaded tube; 504. Push block; 505. Fixing rod; 506. Spring; 507. Sliding block; 6. Connecting assembly; 601. Housing; 602. Second transmission compartment; 603. Second knob; 604. First bevel gear; 605. Rotating shaft; 606. Second bevel gear; 607. Second threaded rod; 608. Threaded cap; 609. Connecting plate; 610. Fixing plate; 611. Third threaded rod. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-6 The present invention provides a technical solution: a modular high-strength steel structure trestle, comprising a support plate 1 and a support column 2 arranged on the surface of the support plate 1, a prefabricated bridge frame 3 is fixed on the surface of the support column 2, and a support unit 4 is arranged on the side of the support column 2, there are two support plates 1 and two support columns 2, and they are symmetrically arranged on both sides of the prefabricated bridge frame 3, the prefabricated bridge frame 3 is connected to the support plate 1 through the support unit 4, and the support column 2 is connected to another support column 2 through the support unit 4; the present invention can modularly install the steel structure trestle through the support plate 1, the support column 2 and the prefabricated bridge frame 3, so that the trestle has greater flexibility and can be adjusted and modified according to needs. At the same time, if it needs to be dismantled or moved in the future, the disassembly of the modular structure is relatively simple. At the same time, the modular design allows each component to be pre-manufactured, and only assembly is required on site, which significantly shortens the construction period and reduces interference with the surrounding environment.

[0019] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4A first fixing groove 102 is provided on the surface of the support plate 1, and the support unit 4 includes a first connecting rod 401 and a second connecting rod 402, the lower end of the second connecting rod 402 is clamped in the first fixing groove 102, and a first groove corresponding to the second connecting rod 402 is provided on the lower surface of the prefabricated bridge frame 3, and the upper end of the second connecting rod 402 is clamped in the first groove; the support column 2 includes a fixing piece 201, a second fixing bolt 202 and a second fixing groove 203, one end of the first connecting rod 401 is clamped in the second fixing groove 203, and the first connecting rod 401 is fixed to the surface of the support column 2 by the second fixing bolt 202, and a second groove corresponding to the first connecting rod 401 is provided on the lower surface of the support column 2, and the upper end of the first connecting rod 401 is clamped in the second groove; the prefabricated bridge frame 3 is clamped on the surface of the support column 2, and the prefabricated bridge frame 3 is fixed to the support column by the fixing piece 201 2 surface, the support column 2 is clamped on the surface of the support plate 1, and the support column 2 is fixed to the surface of the support plate 1 by the first fixing bolt 101, and there are two first connecting rods 401 and second connecting rods 402, both of which are arranged on the side of the support column 2, and the first connecting rod 401 is connected to another first connecting rod 401 by a connecting assembly 6; the present invention forms a stable support system with the prefabricated bridge frame 3, the support column 2 and the support plate 1 through the joint action of the first connecting rod 401 and the second connecting rod 402, thereby enhancing the strength of the overall structure, improving the bending and shearing resistance, effectively dispersing the load applied to the bridge frame and the support column 2, reducing the influence of concentrated force on a single component, thereby improving safety, and at the same time, through the multiple connection points of the first connecting rod 401 and the second connecting rod 402, it is ensured that the bridge frame remains stable during use and will not be displaced or tilted A fixing component 5 and a connecting component 6 are provided on the surface of the supporting unit 4 , and the second connecting rod 402 is fixed to the surface of the supporting plate 1 through the fixing component 5 .

[0020] Please refer to Figure 5The fixing assembly 5 includes a first knob 501 and a first threaded rod 502, a threaded tube 503, a push block 504 and a fixing rod 505 arranged on the side of the first knob 501. The second connecting rod 402 has a first transmission compartment 403 opened inside. The first knob 501 is arranged on the surface of the second connecting rod 402. The upper end of the first threaded rod 502 is fixed to the lower surface of the first knob 501. The lower end of the first threaded rod 502 passes through the first transmission compartment 403 through a bearing. The threaded tube 503 is threadedly connected to the surface of the first threaded rod 502. The push block 504 is fixed to the lower end of the threaded tube 503. The fixing rod 505 is inserted into the first transmission compartment 403, and the fixing rod 505 and the push block 504 are perpendicular to each other. A spring 506 is sleeved on the surface of the rod 505, and a limiting groove 103 is provided on the surface of the first fixing groove 102. One end of the fixing rod 505 is clamped in the limiting groove 103. There are two fixing rods 505 and springs 506, and they are symmetrically arranged on both sides of the pushing block 504. A slider 507 is fixed to the side of the threaded tube 503. A sliding groove is provided on the surface of the first transmission compartment 403. The slider 507 is slidably connected in the sliding groove. The threaded tube 503 is movably connected to the first transmission compartment 403 through the slider 507 and the sliding groove. There are two sliders 507 and the sliding groove, and they are symmetrically arranged on both sides of the threaded tube 503. Through the fixing component 5, the installation process of the second connecting rod 402 is faster and more convenient, which helps to improve construction efficiency.

[0021] Please refer to Figure 4 and Figure 6The connecting component 6 includes a shell 601 and a second transmission chamber 602 opened inside the shell 601. A first bevel gear 604, a rotating shaft 605, a second bevel gear 606, a second threaded rod 607, a third threaded rod 611, a threaded cap 608 and a connecting plate 609 are also provided inside the second transmission chamber 602. A second knob 603 is provided on the surface of the shell 601. The first bevel gear 604 is fixed to the lower surface of the second knob 603 through a rotating shaft and a bearing. The second bevel gear 606 is fixed to the surface of the rotating shaft 605. The first bevel gear 604 is meshed with the second bevel gear 606; one end of the second threaded rod 607 is fixed to one end of the rotating shaft 605, and the other end of the second threaded rod 607 is rotatably connected to the inner wall of the second transmission chamber 602 through a bearing. One end of the third threaded rod 611 is fixed to the other end of the rotating shaft 605, and the other end of the third threaded rod 611 is rotatably connected to the second transmission chamber 60 2 inner wall, the thread directions of the second threaded rod 607 and the third threaded rod 611 are opposite, the threaded cap 608 is threadedly connected to the surface of the second threaded rod 607, the connecting plate 609 is fixed to the surface of the threaded cap 608, and the side of the connecting plate 609 is rotatably connected with a fixing plate 610 through a rotating shaft and a bearing, and the surface of the fixing plate 610 is provided with a connecting groove corresponding to the first connecting rod 401 and the second connecting rod 402; the present invention can connect the two first connecting rods 401 and the two second connecting rods 402 respectively through the connecting assembly 6, so that the interaction between the various components is closer, and the overall strength is further improved, and the connecting assembly 6 can make the first connecting rod 401 and the second connecting rod 402 share the load, ensure the uniform distribution of the load in the overall structure, reduce local stress concentration, prolong the service life, effectively improve the stress characteristics of the bridge under dynamic load, and enhance the seismic resistance and stability.

[0022] The construction method of the modular high-strength steel structure trestle is as follows: First, place the support plate 1 in the construction area, insert the lower end of the support column 2 into the surface of the support plate 1, and fix it with the first fixing bolt 101, then overlap the prefabricated bridge frame 3 on the surface of the support column 2, and fix the prefabricated bridge frame 3 on the surface of the support column 2 with the fixing piece 201, then clamp one end of the first connecting rod 401 in the second fixing groove 203, and clamp the other end in the second groove opened on the lower surface of the support column 2, and fix it with the second fixing bolt 202, then clamp one end of the second connecting rod 402 in the first fixing groove 102, and clamp the other end in the first groove opened on the lower surface of the prefabricated bridge frame 3, and fix it with the fixing assembly 5, and after the fixing is completed, fix the two first connecting rods 401 and the two second connecting rods 402 respectively through the connecting assembly 6; When the second connecting rod 402 needs to be fixed, it is only necessary to turn the first knob 501 to drive the first threaded rod 502 to rotate, the first threaded rod 502 drives the threaded tube 503 to move, and the threaded tube 503 drives the pushing block 504 fixed at one end thereof to move. Since the pushing block 504 and the fixed rod 505 are provided with inclined surfaces on the surfaces, all the pushing blocks 504 can push the fixed rods 505 on both sides to move synchronously during the movement process. When one end of the fixed rod 505 is clamped in the limiting groove 103, the knob can be stopped from being turned. When the two first connecting rods 401 need to be connected and fixed, it is only necessary to place the shell 601 above the first connecting rod 401, and then turn the second knob 603 to drive the first bevel gear 604 to rotate, and the first bevel gear 604 drives the second bevel gear 606 to rotate, and the second bevel gear 606 drives the rotating shaft 605 and the second threaded rod 607 and the third threaded rod 611 fixed at both ends of the rotating shaft 605 to rotate synchronously, the second threaded rod 607 and the third threaded rod 611 drive the threaded cap 608 to move, and the threaded cap 608 drives the connecting plate 609 fixed on its surface to move, thereby driving the rotating fixed plate 610 connected to the side of the connecting plate 609 to move, and then the first connecting rod 401 is clamped in the connecting groove on the surface of the fixed plate 610.

[0023] This method reduces the required manual intervention through simplified operation and design, thereby reducing labor costs and improving economic benefits. The fixing measures between the support plate 1, the support column 2, the prefabricated bridge frame 3 and the connecting rod ensure the overall stability of the structure, greatly enhance the earthquake resistance and bearing capacity, and through the limit mechanism and synchronous movement design, ensure that all connecting parts are stable and reliable, reduce the safety hazards caused by improper assembly, and during later maintenance, construction personnel can easily adjust or replace the connecting component 6 without the need for a complicated disassembly process, reducing the difficulty and cost of subsequent maintenance.

[0024] Working principle: First, the staff places the support plate 1 in the construction area, inserts the lower end of the support column 2 into the surface of the support plate 1, and fixes it with the first fixing bolt 101. Then, the staff overlaps the prefabricated bridge frame 3 on the surface of the support column 2, and fixes the prefabricated bridge frame 3 to the surface of the support column 2 with the fixing piece 201. Subsequently, one end of the first connecting rod 401 is clamped in the second fixing groove 203, and the other end is clamped in the second groove opened on the lower surface of the support column 2, and fixed with the second fixing bolt 202. Then, the staff clamps one end of the second connecting rod 402 in the first fixing groove 102, and the other end is clamped in the first groove opened on the lower surface of the prefabricated bridge frame 3, and fixed with the fixing assembly 5. After the fixing is completed, the two first connecting rods 401 and the two second connecting rods 402 are respectively fixedly connected by the connecting assembly 6; When the second connecting rod 402 needs to be fixed, the staff only needs to turn the first knob 501 to drive the first threaded rod 502 to rotate, the first threaded rod 502 drives the threaded tube 503 to move, and the threaded tube 503 drives the pushing block 504 fixed at one end thereof to move. Since the pushing block 504 and the fixed rod 505 are provided with inclined surfaces on the surfaces, all the pushing blocks 504 can push the fixed rods 505 on both sides to move synchronously during the movement process. When one end of the fixed rod 505 is clamped in the limiting groove 103, the staff can stop turning the knob; When it is necessary to connect and fix the two first connecting rods 401, the staff only needs to place the shell 601 above the first connecting rod 401, and then turn the second knob 603 to drive the first bevel gear 604 to rotate, and the first bevel gear 604 drives the second bevel gear 606 to rotate, and the second bevel gear 606 drives the rotating shaft 605 and the second threaded rod 607 and the third threaded rod 611 fixed at both ends of the rotating shaft 605 to rotate synchronously, the second threaded rod 607 and the third threaded rod 611 drive the threaded cap 608 to move, and the threaded cap 608 drives the connecting plate 609 fixed on its surface to move, thereby driving the rotating fixed plate 610 connected to the side of the connecting plate 609 to move, and then the first connecting rod 401 is clamped in the connecting groove on the surface of the fixed plate 610.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A modular high-strength steel structure trestle, comprising a support plate (1) and a support column (2) arranged on the surface of the support plate (1), characterized in that: A prefabricated bridge frame (3) is fixed on the surface of the support column (2); a support unit (4) is arranged on the side of the support column (2); there are two support plates (1) and two support columns (2), which are symmetrically arranged on both sides of the prefabricated bridge frame (3); the prefabricated bridge frame (3) is connected to the support plate (1) via the support unit (4); and the support column (2) is connected to another support column (2) via the support unit (4); The support plate (1) has a first fixing groove (102) formed on its surface, the support unit (4) comprises a first connecting rod (401) and a second connecting rod (402), the lower end of the second connecting rod (402) being clamped in the first fixing groove (102), the lower surface of the prefabricated bridge frame (3) having a first groove corresponding to the second connecting rod (402), the upper end of the second connecting rod (402) being clamped in the first groove; The support column (2) comprises a fixing member (201), a second fixing bolt (202) and a second fixing groove (203); one end of the first connecting rod (401) is clamped in the second fixing groove (203), and the first connecting rod (401) is fixed to the surface of the support column (2) by the second fixing bolt (202); a second groove corresponding to the first connecting rod (401) is formed on the lower surface of the support column (2), and the upper end of the first connecting rod (401) is clamped in the second groove; A fixing component (5) and a connecting component (6) are provided on the surface of the support unit (4), and the second connecting rod (402) is fixed to the surface of the support plate (1) via the fixing component (5).

2. A modular high-strength steel structure trestle according to claim 1, characterized in that: The prefabricated bridge frame (3) is clamped on the surface of the support column (2), and the prefabricated bridge frame (3) is fixed to the surface of the support column (2) via a fixing member (201); the support column (2) is clamped on the surface of the support plate (1), and the support column (2) is fixed to the surface of the support plate (1) via a first fixing bolt (101); there are two first connecting rods (401) and two second connecting rods (402), both of which are arranged on the side of the support column (2); the first connecting rod (401) is connected to another first connecting rod (401) via a connecting assembly (6).

3. The modular high-strength steel structure trestle according to claim 1, characterized in that: The fixing assembly (5) comprises a first knob (501) and a first threaded rod (502), a threaded tube (503), a pushing block (504) and a fixing rod (505) arranged on the side of the first knob (501); a first transmission compartment (403) is provided inside the second connecting rod (402); the first knob (501) is arranged on the surface of the second connecting rod (402); the upper end of the first threaded rod (502) is fixed to the lower surface of the first knob (501); the lower end of the first threaded rod (502) passes through the first transmission compartment (403) via a bearing; the threaded tube (503) is threadedly connected to the surface of the first threaded rod (502); and the pushing block (504) is fixed to the lower end of the threaded tube (503).

4. The modular high-strength steel structure trestle according to claim 3, characterized in that: The fixing rod (505) is inserted into the first transmission bin (403), and the fixing rod (505) and the pushing block (504) are perpendicular to each other. A spring (506) is sleeved on the surface of the fixing rod (505). A limiting groove (103) is provided on the surface of the first fixing groove (102). One end of the fixing rod (505) is clamped in the limiting groove (103). There are two fixing rods (505) and two springs (506), which are symmetrically arranged on both sides of the pushing block (504). A slider (507) is fixed to the side of the threaded tube (503). A sliding groove is provided on the surface of the first transmission bin (403). The slider (507) is slidably connected in the sliding groove. The threaded tube (503) is movably connected to the first transmission bin (403) through the slider (507) and the sliding groove. There are two sliders (507) and two sliding grooves, which are symmetrically arranged on both sides of the threaded tube (503).

5. The modular high-strength steel structure trestle according to claim 1, characterized in that: The connecting assembly (6) comprises a housing (601) and a second transmission chamber (602) opened inside the housing (601); a first bevel gear (604), a rotating shaft (605), a second bevel gear (606), a second threaded rod (607), a third threaded rod (611), a threaded cap (608) and a connecting plate (609) are also arranged inside the second transmission chamber (602); a second knob (603) is arranged on the surface of the housing (601); the first bevel gear (604) is fixed to the lower surface of the second knob (603) via a rotating shaft and a bearing; the second bevel gear (606) is fixed to the surface of the rotating shaft (605); and the first bevel gear (604) is meshed with the second bevel gear (606).

6. The modular high-strength steel structure trestle according to claim 5, characterized in that: One end of the second threaded rod (607) is fixed to one end of the rotating shaft (605), and the other end of the second threaded rod (607) is rotatably connected to the inner wall of the second transmission chamber (602) through a bearing. One end of the third threaded rod (611) is fixed to the other end of the rotating shaft (605), and the other end of the third threaded rod (611) is rotatably connected to the inner wall of the second transmission chamber (602) through a bearing. The thread directions of the second threaded rod (607) and the third threaded rod (611) are opposite. The threaded cap (608) is threadedly connected to the surface of the second threaded rod (607). The connecting plate (609) is fixed to the surface of the threaded cap (608). The side of the connecting plate (609) is rotatably connected to a fixed plate (610) through a rotating shaft and a bearing. The surface of the fixed plate (610) is provided with connecting grooves corresponding to the first connecting rod (401) and the second connecting rod (402).

7. The construction method of a modular high-strength steel structure trestle according to claim 1, characterized in that: The following steps are involved: First, the support plate (1) is placed in the construction area, the lower end of the support column (2) is inserted into the surface of the support plate (1) and fixed by a first fixing bolt (101), then the prefabricated bridge frame (3) is overlapped on the surface of the support column (2), and the prefabricated bridge frame (3) is fixed to the surface of the support column (2) by a fixing member (201), then one end of the first connecting rod (401) is clamped in the second fixing groove (203), and the other end is clamped in the second groove opened on the lower surface of the support column (2), and fixed by a second fixing bolt (202), then one end of the second connecting rod (402) is clamped in the first fixing groove (102), and the other end is clamped in the first groove opened on the lower surface of the prefabricated bridge frame (3), and fixed by a fixing assembly (5), and after the fixing is completed, the two first connecting rods (401) and the two second connecting rods (402) are respectively fixedly connected by a connecting assembly (6); When the second connecting rod (402) needs to be fixed, it is only necessary to turn the first knob (501) to drive the first threaded rod (502) to rotate, the first threaded rod (502) drives the threaded tube (503) to move, and the threaded tube (503) drives the pushing block (504) fixed at one end thereof to move. Since the pushing block (504) and the fixing rod (505) are provided with inclined surfaces on their surfaces, all the pushing blocks (504) can push the fixing rods (505) on both sides to move synchronously during the movement process. When one end of the fixing rod (505) is clamped in the limiting groove (103), the turning of the knob can be stopped. When it is necessary to connect and fix the two first connecting rods (401), it is only necessary to place the housing (601) above the first connecting rod (401), and then turn the second knob (603) to drive the first bevel gear (604) to rotate, the first bevel gear (604) drives the second bevel gear (606) to rotate, the second bevel gear (606) drives the rotating shaft (605) and the second threaded rod (607) and the third threaded rod (611) fixed at both ends of the rotating shaft (605) to rotate synchronously, the second threaded rod (607) and the third threaded rod (611) drive the threaded cap (608) to move, the threaded cap (608) drives the connecting plate (609) fixed on its surface to move, thereby driving the fixing plate (610) connected to the side of the connecting plate (609) to move, and then the first connecting rod (401) is clamped in the connecting groove on the surface of the fixing plate (610).

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