A double-sided balanced traction device and method for a steel structure frame bridge

Abstract

The invention discloses a bilateral balanced traction device and method for a steel structure frame bridge, which belongs to the field of bridge construction, and includes a temporary support, a bridge pier, a tank wheel, a bridge steel frame, a guide bridge, a guide bridge tension wire, a traction gantry, a contraction tension wire, a winder and a fixed pulley device. The invention reduces the construction work on the river surface, has better safety, and the cost of using a winch for traction is also low. The bilateral balanced traction technology for steel structure frame bridge is a relatively simple and safe construction method, which has the characteristics of simple equipment and process, on-shore assembly, large operating space, wide operating surface, fast construction speed, low cost, etc. This device is used for the traction construction of Daxin Shuolong steel structure frame bridge, which ensures the construction quality, reduces the cost, completes the main bridge erection task half a month ahead of schedule, and achieves good economic and social benefits.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to a double-sided balanced traction device for a steel structure frame bridge and a method thereof. Background Art

[0002] Existing steel frame bridges are all installed using large cranes, but cranes can only be used to lift some small steel frame bridges. For some large steel frame bridges, the weight is large, reaching thousands of tons, and it is impossible to use a crane to lift them. Especially for some rivers that are more than 50 or 60 meters long, it is impossible to use a crane to directly lift them, which increases the difficulty of construction. The shore is set up to install the gantry cableway parts, and the construction work is carried out on the river surface, which is generally safe; the gantry is set up, the suspension cable is installed, and the parts are installed, and the construction period is long; the parts are installed on the river surface, and the assembly and welding quality cannot be guaranteed. It is necessary to use a large-tonnage crane, the market resources are limited, the entry and exit are cumbersome, and the shift fee is high. Therefore, it is necessary to design a bilateral balanced traction device and method for a steel structure frame bridge to further simplify the installation and construction of large steel frame bridges and improve the efficiency of construction. Summary of the invention

[0003] The purpose of the present invention is to provide a bilateral balanced traction device and method for a steel structure frame bridge, so as to solve the technical problem that the existing large steel frame bridges over wide rivers cannot be hoisted.

[0004] A bilateral balanced traction device for a steel structure frame bridge comprises a temporary support, a bridge pier, a tank wheel, a bridge steel frame, a guide bridge, a guide bridge tension wire, a traction gantry, a contraction tension wire, a winch and a fixed pulley device. The bridge piers are arranged on both sides of a river channel, and the temporary support is arranged between the bridge piers. The tank wheel is arranged at the top of the temporary support and the bridge piers. The bridge steel frame is welded and formed on the tank wheel on the river bank on one side of the river channel. The guide bridge is hoisted and arranged on the river channel, one end of which is fixedly connected to the bridge steel frame and the other end is arranged on the tank wheel on the river bank on one side of the river channel. The traction gantry is arranged at the rear side of the bridge pier, the fixed pulley device is arranged at the rear side of the traction gantry, and the winch is arranged at the bottom of the traction gantry. The traction gantry is connected to the guide bridge tension wire through the contraction tension wire via the fixed pulley device, and the other end of the guide bridge tension wire is connected to one end of the guide bridge and spans over the traction gantry.

[0005] Furthermore, the fixed pulley device includes a tension positioning plate, a concrete buried pier, a concrete base pier and a fully buried ground anchor, the concrete base pier is arranged under the ground surface, the fully buried ground anchor is fixed on the concrete base pier, the concrete buried pier is buried on the fully buried ground anchor, one end of the tension positioning plate is connected to the fully buried ground anchor, and the other end is slidably connected to the contraction tension steel wire.

[0006] Furthermore, a fixed pulley is provided on the tension positioning plate, the fixed pulley is fixedly arranged at one end of the tension positioning plate, and the contraction tension steel wire passes through the fixed pulley and is slidably arranged.

[0007] Furthermore, the fully buried ground anchor includes a bottom plate, a side fixing plate and a transverse axis, the bottom plate is fixedly arranged on the concrete foundation pier, the side fixing plate is arranged on the bottom plate, and the transverse axis spans between the side fixing plates.

[0008] Furthermore, the bottom plate is provided with a plurality of bolt holes, and is fixed on the concrete foundation pier by bolts passing through the bolt holes.

[0009] Furthermore, the tank wheel includes a fixed base plate, a support column and a rotating wheel, wherein the fixed base plate is fixed to the top of the bridge pier and the temporary support, the support column is vertically fixed to the fixed base plate, and the rotating wheel is rotatably arranged between the two support columns.

[0010] Furthermore, the guide bridge has the same size as the bridge steel frame, one end of the guide bridge is placed in a relatively fixed position relative to one end of the bridge steel frame, and is fixed by welding with a steel plate.

[0011] A bilateral balanced traction method for a steel structure frame bridge, the method comprising the following steps:

[0012] Step 1: Construct the bridge piers according to the design drawings, then set up temporary brackets between the piers, and install fixed tank wheels on the top of the temporary brackets and the piers;

[0013] Step 2: Assemble and weld the load-bearing truss beams on both sides of the steel frame of the river-crossing bridge on the temporary supports and piers on the bank of one side of the river. After assembling and welding the load-bearing truss beams on both sides of the axis, connect the cross beams to form an overall stable bridge frame structure;

[0014] Step 3: Calculate the required traction force according to the weight of the bridge structure and the friction factor with the tank wheel, then design the guide bridge according to the traction force and the width of the river, weld the guide bridge on both sides, and then use a crane to hoist it on the river. One end of the guide bridge is fixedly connected to one end of the bridge steel frame, and the other end is placed on the top of the temporary support and bridge pier on the other side to install and fix the tank wheel;

[0015] Step 4: Install the traction gantry, bury the pulley device, install the guide bridge tension wire and the contraction tension wire, calculate the traction force required for the frame bridge traction according to the traction weight and the static friction coefficient of each support point, and then determine the specifications and quantity of the winch, and use the box-type steel column to make the traction gantry;

[0016] Step 5: Start the winch to pull the guide bridge toward the shore, and the guide bridge drives the bridge steel frame to move toward the other shore until the bridge steel frame spans the piers on both sides of the river;

[0017] Step 6: Use a jack to remove the tank wheels, then disassemble the guide bridge and traction gantry to complete the bridge steel frame traction installation.

[0018] Furthermore, in step 5, the winch is started at the lowest gear, the guide bridge starts to move forward, and stops after moving 100mm in front to check according to the content of the monitoring item standard. During the traction process, the center line of the steel beam, the longitudinal horizontal displacement of the pier top, and the guide beam deflection are monitored. The center line of the steel beam and the longitudinal horizontal displacement of the pier top are observed every half an hour. The center line of the steel beam is monitored by a total station, and the limiter is corrected; the longitudinal horizontal displacement of the pier top is monitored by hanging a plumb bob on the extension line of the pier top axis, and the deflection of the cantilever end is monitored by a level. When the offset value of the center line of the beam body is greater than 20mm, the deviation is corrected to make the bridge correct. If the longitudinal horizontal displacement of the pier top is close to the calculated value, adjust the tension of the steel hinge wires before and after the pier to reduce its horizontal displacement, make traction records and stress monitoring, test the internal force of the beam section every 4m of traction, and deal with abnormalities in time until the bridge is pulled into place.

[0019] Furthermore, in step 4, a main control console is set up next to the main bridge pier to control the two winches to start and stop at the same time to achieve synchronization, thereby realizing centralized control and synchronous operation of two-point traction. They can also be started and work independently. The fully buried ground anchor is made of C25 grade concrete and mainly bears the reaction force of traction and upward pull-out resistance.

[0020] The present invention adopts the above technical solution, and the present invention has the following technical effects:

[0021] The present invention improves safety by reducing construction work on the river surface, and the cost of using a winch for traction is also low. The bilateral balanced traction technology of the steel structure frame bridge is a relatively simple and safe construction method, which has the characteristics of simple equipment and process, onshore assembly, large operating space, wide working area, fast construction speed and low cost. This device is used in the traction construction of the Daxin Shuolong steel structure frame bridge, which ensures construction quality, reduces costs, completes the main bridge erection task half a month ahead of schedule, and achieves good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the traction device of the present invention.

[0023] Figure 2 It is a schematic diagram of the guide bridge structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the fully buried ground anchor structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the tank wheel structure of the present invention.

[0026] Figure 5 yes Figure 1 A is an enlarged view.

[0027] Figure 6 It is the guide bridge verification analysis diagram of the present invention.

[0028] Figure 7 It is a flow chart of the bridge steel frame installation process of the present invention.

[0029] Numbers in the figure: 1. Temporary support; 2. Bridge pier; 3. Tank wheel; 3.1. Fixed bottom plate; 3.2. Support column; 3.3. Rotating wheel; 4. Bridge steel frame; 5. Guide bridge; 6. Guide bridge tension wire; 7. Traction gantry; 8. Contraction tension wire; 9. Tension positioning plate; 10. Concrete landfill pier; 11. Concrete foundation pier; 12. Fully buried ground anchor; 12.1. Bottom plate; 12.2. Bolt hole; 12.3. Side fixing plate; 12.4. Horizontal axis; 13. Winch; 14. River channel. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, preferred embodiments are given to further describe the present invention in detail. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0031] like Figure 1 As shown, a bilateral balanced traction device for a steel structure frame bridge of the present invention comprises a temporary support 1, a bridge pier 2, a tank wheel 3, a bridge steel frame 4, a guide bridge 5, a guide bridge tension wire 6, a traction gantry 7, a contraction tension wire 8, a winch 13 and a fixed pulley device. The bridge piers 2 are arranged on both sides of the river channel 14, and the temporary support 1 is arranged between the bridge piers 2 and the bridge piers 2. The tank wheel 3 is arranged on the top of the temporary support 1 and the bridge pier 2. The bridge steel frame 4 is welded on the tank wheel 3 on the river bank on one side of the river channel 14. The guide bridge 5 is hoisted and arranged on the river channel 14, one end of which is fixedly connected to the bridge steel frame 4, and the other end is arranged on the tank wheel 3 on the river bank on one side of the river channel 14. The traction gantry 7 is arranged on the rear side of the bridge pier 2, the fixed pulley device is arranged on the rear side of the traction gantry 7, and the winch 13 is arranged at the bottom of the traction gantry 7. The traction gantry 7 is connected to the guide bridge tension wire 6 through the fixed pulley device by contracting the tension wire 8, and the other end of the guide bridge tension wire 6 is connected to one end of the guide bridge 5 and spans the traction gantry 7.

[0032] The bridge steel frame 4 is welded on one side of the river channel 14. The bridge steel frame 4 is about 750 tons and cannot be hoisted by a crane. Then the guide bridge 5 directly spans the river channel. The guide bridge 5 is about 32 tons and can be directly installed on both sides using a general crane. There are multiple guide bridge tension wires 6, which are then gathered on a hook and then spanned across the traction gantry 7. The traction gantry 7 is used to maintain the pulling of the guide bridge 5. It is a horizontal lateral force. The height of the traction gantry 7 is similar to the height of the temporary support 1 and the bridge pier 2. The fixed pulley device acts as a reaction force and is also equivalent to a stator, so that when the winch 13 rotates, the tension wire 8 shrinks and the fixed pulley device remains fixed.

[0033] In the embodiment of the present invention, the fixed pulley device includes a tension positioning plate 9, a concrete buried pier 10, a concrete foundation pier 11 and a fully buried anchor 12. The concrete foundation pier 11 is set under the ground surface, the fully buried anchor 12 is fixed on the concrete foundation pier 11, the concrete buried pier 10 is buried on the fully buried anchor 12, one end of the tension positioning plate 9 is connected to the fully buried anchor 12, and the other end is slidably connected to the shrink tension wire 8. The concrete foundation pier 11 is set two meters above the ground surface and poured with concrete. The side of the concrete foundation pier 11 is larger than the fully buried anchor 12. After the fully buried anchor 12 is fixed, concrete is poured from top to bottom to form the concrete buried pier 10. Two tension positioning plates 9 can be set or one of them as a backup to prevent breakage or something during the pulling process.

[0034] In the embodiment of the present invention, a fixed pulley is arranged on the tension positioning plate 9, and the fixed pulley is fixedly arranged at one end of the tension positioning plate 9, and the contraction tension steel wire 8 passes through the fixed pulley and is slidably arranged. The end of the tension positioning plate 9 where the fixed pulley is arranged is arranged as a forked structure, and the fixed pulley is arranged in the middle of the forked structure to form a fixed pulley structure.

[0035] In an embodiment of the present invention, the fully buried ground anchor 12 includes a bottom plate 12.1, a side fixing plate 12.3 and a transverse axis 12.4. The bottom plate 12.1 is fixedly arranged on the concrete foundation pier 11, the side fixing plate 12.3 is arranged on the bottom plate 12.1, and the transverse axis 12.4 spans between the side fixing plates 12.3. The fixing plate 12.3 serves as an integral output structure, and the transverse axis 12.4 can adjust the specific angle of the tension positioning plate 9 during installation to better meet the pulling requirements. The bottom plate 12.1 is provided with a plurality of bolt holes 12.2, and is fixed to the concrete foundation pier 11 by passing bolts through the bolt holes 12.2. The bolt holes 12.2 are used to pass bolts to increase the force of the bottom plate 12.1 in the vertical direction.

[0036] In the embodiment of the present invention, the tank wheel 3 includes a fixed base plate 3.1, a support column 3.2 and a rotating wheel 3.3. The fixed base plate 3.1 is fixed to the top of the bridge pier 2 and the temporary support 1, the support column 3.2 is vertically fixed to the fixed base plate 3.1, and the rotating wheel 3.3 is rotatably arranged between the two supporting columns 3.2. The fixed base plate 3.1 is fixed to the bridge pier 2 and the temporary support 1 by bolts and screws, and a position for installing a jack later is reserved on the side. The rotating wheel 3.3 acts as a rotating wheel of sliding friction, and the supporting column 3.2 mainly acts as a supporting force in the vertical direction.

[0037] In the embodiment of the present invention, the guide bridge 5 is the same size as the bridge steel frame 4, one end of the guide bridge 5 is placed relatively fixed to one end of the bridge steel frame 4, and is fixed by welding with a steel plate. Since the guide bridge 5 is relatively arranged with the bridge steel frame 4, during the pulling process, the guide bridge 5 and the bridge steel frame 4 are relatively supported by force, and will not fall down, which well solves the problem of installing a large steel frame bridge across a long distance river surface.

[0038] A bilateral balanced traction method for a steel structure frame bridge, the method comprising the following steps:

[0039] Step 1: According to the design drawings, construct the bridge pier 2, then set up temporary brackets 1 between the bridge piers 2, and install fixed tank wheels 3 on the top of the temporary brackets 1 and the bridge piers 2. The design drawings are set according to the relevant national standards and requirements.

[0040] Step 2: Assemble and weld the load-bearing truss beams on both sides of the steel frame 4 of the river-crossing bridge on the temporary support 1 and the bridge pier 2 on the bank of one side of the river channel 14. After the load-bearing truss beams on both sides of the axis are assembled and welded, the cross beams are connected to form an overall stable bridge frame structure. The main beam of the frame is a truss structure with a large span. Based on the site conditions and road transportation conditions, the frame structure is processed in sections in the factory and then transported to the site for assembly and installation in sections. Frames 71HJ1 and 72HJ1 are manufactured as a whole in the workshop and transported to the site in sections. After being welded together on the ground, they are laid horizontally on the column pier as an assembly platform and an auxiliary platform. A sliding trolley (a flat tank wheel trolley) is installed on the south bank pier and the temporary pillar platform to assemble and weld the load-bearing truss beams 73HJ1 and 73HJ2 on both sides of the river-crossing frame beam. The load-bearing truss beams on both sides of the axis are assembled and welded, and the cross beams are connected to form an overall stable structure. The overall structural dimensions of the component are 60.65 meters long, 5.1 meters wide and 16 meters high, with a total weight of about 400 tons to 450 tons. It adopts a structure with a light head and a heavy tail.

[0041] Step 3: Calculate the required traction force according to the weight of the bridge structure and the friction factor with the tank wheel 3, then design the guide bridge 5 according to the traction force and the width of the river channel 14, weld the guide bridge 5 on both sides, and then use a crane to lift it on the river channel 14, one end of the guide bridge 5 is fixedly connected to one end of the bridge steel frame 4, and the other end is placed on the top of the temporary support 1 and the bridge pier 2 on the other bank and installed on the fixed tank wheel 3.

[0042] Step 4: Install the traction gantry 7, bury the set pulley device, install the guide bridge tension wire 6 and the contraction tension wire 8, and calculate the traction force required for the frame bridge traction according to the traction weight and the static friction coefficient of each support point traction, so as to determine the specifications and quantity of the winch 13, and use the box-type steel column to make the traction gantry 7. A main control console is set up next to the main bridge pier to control the two winches to start and stop at the same time to achieve synchronization, realize the centralized control and synchronous operation of two-point traction, and can also be started and worked independently. The fully buried ground anchor is made of C25 grade concrete, which mainly bears the reaction force of traction and the upward pull-out force.

[0043] Step 5: Start the winch 13 to pull the guide bridge 5 to move toward the shore, and the guide bridge 5 drives the bridge steel frame 4 to move toward the other shore until the bridge steel frame 4 spans the bridge piers 2 on both sides of the river channel 14.

[0044] Start the winch 13 at the lowest gear, and the guide bridge 5 starts to move forward. After moving 100mm in front, stop and check according to the content of the monitoring item standard. During the traction process, monitor the center line of the steel beam, the longitudinal horizontal displacement of the pier top, and the guide beam deflection. The center line of the steel beam and the longitudinal horizontal displacement of the pier top are observed every half an hour. The center line of the steel beam is monitored by a total station, and the limiter is corrected; the longitudinal horizontal displacement of the pier top is monitored by hanging a plumb bob on the extension line of the pier top axis, and the deflection of the cantilever end is monitored by a level. When the offset value of the center line of the beam body is greater than 20mm, correct the deviation to make the bridge correct. If the longitudinal horizontal displacement of the pier top is close to the calculated value, adjust the tension of the steel hinge wires before and after the pier to reduce its horizontal displacement, make traction records and stress monitoring, test the internal force of the beam section every 4m of traction, and deal with abnormalities in time until the bridge is pulled into place.

[0045] Step 6: Use a jack to remove the tank wheel 3, then disassemble the guide bridge 5 and the traction gantry 7 to complete the traction installation of the bridge steel frame 4.

[0046] The practice project is located in Shuolong Town, Daxin County, Guangxi. The main channel is divided into two parts, of which the riverside part is a steel frame structure. The design reference period of the structure of this project is 50 years, the structural design service life is 50 years, and the safety level of the steel structure is level 2. This bridge is a continuous steel structure system, with a whole layout and a frame structure.

[0047] This project is a classical bridge, with the main structure being a river-crossing frame bridge, with a span of 60.65m, a width of 16m, and a total weight of more than 750 tons. The traction installation process and welding quality control will be one of the key points of the project.

[0048] After the frame beams on the south bank are assembled and welded, they are connected to form an overall stable structure and then led to the pier foundation on the north bank. The entire traction and installation process is the difficult part of the project.

[0049] According to the site conditions, the scheme design analysis is carried out: if the shore is used to erect the gantry cableway and the parts are installed, the construction work will be carried out on the river surface, and the safety is general; the gantry is erected, the suspension cable is installed, and the parts are installed, the construction period is long; the parts are installed on the river surface, and the assembly and welding quality cannot be guaranteed. It is necessary to use a large-tonnage crane, the market resources are limited, the entry and exit are cumbersome, and the shift fee is high. Finally, the main bridge is assembled and manufactured on the south bank, and then towed to the north bank as a whole, reducing the construction work on the river surface, and the safety is better. The cost of using a winch for traction is also low. The bilateral balanced traction technology of the steel structure frame bridge is a relatively simple and safe construction method. It has the characteristics of simple equipment and process, on-shore assembly, large operating space, wide operating area, fast construction speed, and low cost. This method is used in the traction construction of the Daxin Shuolong steel structure frame bridge, which ensures the construction quality, reduces costs, completes the main bridge erection task half a month ahead of schedule, and achieves good economic and social benefits.

[0050] A. Stopping position of traction winch on the north bank: Determine the hoisting work position according to the hoisting design requirements of the frame bridge traction. After positioning, install the clamps and pads before carrying out the hoisting work.

[0051] B. Obtain the regular weather forecast within 24 hours before lifting to ensure that the weather conditions are acceptable. Observe the changes in the river water in combination with the weather conditions to ensure that the wind and wave conditions are acceptable.

[0052] C. Ensure the safety of frame bridge hoisting: All equipment and components are fixed and safety railings are installed around. Any additional weight on the beam section, such as counterweights and components, must be checked to confirm that they are evenly distributed and within the safe hoisting capacity of the winch.

[0053] D. Check whether the safety devices and protective devices of the lifting machinery are complete, whether the operating system and braking system are normal. Check whether the rope clamps and fixtures are deformed, cracked, worn, and other abnormal conditions.

[0054] E. Check that the installation and correction of the support platform and sliding bearings are completed, and the on-site elevation and axis verification and correction are completed to meet the installation and construction requirements.

[0055] F. Fix the winch and related pulleys according to the actual situation on site. The traction wire rope should be parallel to the bottom end beam when under stress. The tank wheel trolley should be lubricated with grease as much as possible.

[0056] G. All measuring instruments and tools should be sent to relevant departments for inspection according to relevant quality management regulations before use, and can only be used after obtaining the certificate of qualification from the relevant quality inspection department. During use, relevant personnel should frequently conduct self-inspection and self-calibration of the instruments and tools used to keep them in good condition.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bilateral balanced traction method for a steel structure frame bridge, characterized in that: The balanced traction method is used for a bilateral balanced traction device of a steel structure frame bridge, the balanced traction device comprising a temporary support (1), a bridge pier (2), a tank wheel (3), a bridge steel frame (4), a guide bridge (5), a guide bridge tension wire (6), a traction gantry (7), a contraction tension wire (8), a winch (13) and a fixed pulley device, the bridge pier (2) is arranged on both sides of a river channel (14), and the temporary support (1) is arranged between the bridge piers (2) and the bridge piers (2), the tank wheel (3) is arranged at the top of the temporary support (1) and the bridge pier (2), and the bridge steel frame (4) is welded on the tank wheel (3) on the river bank on one side of the river channel (14) The guide bridge (5) is hoisted and arranged on the river channel (14), one end of which is fixedly connected to the bridge steel frame (4), and the other end is arranged on the tank wheel (3) on the river bank of one side of the river channel (14); the traction gantry (7) is arranged on the rear side of the bridge pier (2); the fixed pulley device is arranged on the rear side of the traction gantry (7); the hoist (13) is arranged at the bottom of the traction gantry (7); the hoist (13) is connected to the guide bridge tension wire (6) through the fixed pulley device by contracting the tension wire (8); the other end of the guide bridge tension wire (6) is connected to one end of the guide bridge (5) and spans over the traction gantry (7); The fixed pulley device comprises a tension positioning plate (9), a concrete buried pier (10), a concrete foundation pier (11) and a fully buried ground anchor (12); the concrete foundation pier (11) is arranged below the ground surface; the fully buried ground anchor (12) is fixed on the concrete foundation pier (11); the concrete buried pier (10) is buried on the fully buried ground anchor (12); one end of the tension positioning plate (9) is connected to the fully buried ground anchor (12); and the other end is slidably connected to the contraction tension steel wire (8); The tension positioning plate (9) is provided with a fixed pulley, the fixed pulley is fixedly arranged at one end of the tension positioning plate (9), and the contraction tension steel wire (8) passes through the fixed pulley and is slidably arranged; The fully buried ground anchor (12) comprises a bottom plate (12.1), a side fixing plate (12.3) and a transverse axis (12.4); the bottom plate (12.1) is fixedly arranged on the concrete foundation pier (11); the side fixing plate (12.3) is arranged on the bottom plate (12.1); and the transverse axis (12.4) spans between the side fixing plates (12.3); The bottom plate (12.1) is provided with a plurality of bolt holes (12.2), and is fixed to the concrete foundation pier (11) by bolts passing through the bolt holes (12.2); The tank wheel (3) comprises a fixed bottom plate (3.1), a support column (3.2) and a rotating wheel (3.3); the fixed bottom plate (3.1) is fixed to the top of the bridge pier (2) and the temporary support (1); the support column (3.2) is vertically fixed to the fixed bottom plate (3.1); and the rotating wheel (3.3) is rotatably arranged between the two support columns (3.2); The method comprises the following steps: Step 1: construct the bridge pier (2) according to the design drawings, then set up temporary brackets (1) between the bridge piers (2) and the bridge piers (2), and install fixed tank wheels (3) on the top of the temporary brackets (1) and the bridge piers (2); Step 2: Assemble and weld the load-bearing truss beams on both sides of the river-crossing bridge steel frame (4) on the temporary support (1) and the bridge pier (2) on one side of the river channel (14); after the load-bearing truss beams on both sides of the axis are assembled and welded, connect the cross beams to form an integral stable bridge frame structure; Step 3: Calculate the required traction force according to the weight of the bridge structure and the friction factor with the tank wheel (3), then design the guide bridge (5) according to the traction force and the width of the river channel (14), weld the guide bridge (5) on both sides, and then use a crane to hoist it on the river channel (14), one end of the guide bridge (5) is fixedly connected to one end of the bridge steel frame (4), and the other end is placed on the top of the temporary support (1) and the bridge pier (2) on the other side and fixed on the tank wheel (3); Step 4: Install the traction gantry (7), bury the pulley device, install the guide bridge tension wire (6) and the contraction tension wire (8), calculate the traction force required for the frame bridge traction according to the traction weight and the static friction coefficient of each support point, thereby determining the specifications and quantity of the winch (13), and use the box-type steel column to make the traction gantry (7); Step 5: Start the winch (13) to pull the guide bridge (5) toward the shore, and the guide bridge (5) drives the bridge steel frame (4) to move toward the other shore until the bridge steel frame (4) spans the bridge piers (2) on both sides of the river channel (14); Step 6: Use a jack to remove the tank wheel (3), then disassemble the guide bridge (5) and the traction gantry (7), and complete the traction installation of the bridge steel frame (4); In step 5, the winch (13) is started at the lowest gear, and the guide bridge (5) begins to move forward. After moving 100 mm in front, the winch is stopped and checked according to the contents of the monitoring item standard. During the traction process, the center line of the steel beam, the longitudinal horizontal displacement of the pier top, and the guide beam deflection are monitored. The center line of the steel beam and the longitudinal horizontal displacement of the pier top are observed every half an hour. The center line of the steel beam is monitored by a total station, and the limiter is corrected. The longitudinal horizontal displacement of the pier top is monitored by hanging a plumb bob on the extension line of the pier top axis, and the deflection of the cantilever end is monitored by a level. When the center line offset value of the beam body is greater than 20 mm, the deviation is corrected to make the bridge in the right position. If the longitudinal horizontal displacement of the pier top is close to the calculated value, the tension of the steel hinge wires before and after the pier is adjusted to reduce its horizontal displacement. The traction record and stress monitoring are made. The internal force of the beam section is tested every 4 m of traction. If abnormalities are found, they are handled in time until the bridge is pulled into place.

2. The method for bilateral balanced traction of a steel structure frame bridge according to claim 1, characterized in that: The guide bridge (5) is the same size as the bridge steel frame (4). One end of the guide bridge (5) is placed in a fixed position relative to one end of the bridge steel frame (4) and is fixed by welding with a steel plate.

3. The method for bilateral balanced traction of a steel frame bridge according to claim 1, characterized in that: In step 4, a main control console is set up next to the main bridge pier to control the two winches to start and stop at the same time to achieve synchronization, thereby realizing centralized control and synchronous operation of two-point traction. They can also be started and work independently. The fully buried ground anchor is made of C25 grade concrete and mainly bears the reaction force of traction and upward pull-out resistance.

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