Installation method of steel truss girder

Abstract

The invention relates to a mounting method of a steel truss girder, and relates to the technical field of steel truss girder construction.The mounting method of the steel truss girder comprises the following steps that a supporting structure is constructed, specifically, a first support, a second support, a first cross beam and a second cross beam are erected; assembling the steel truss girder: assembling the steel truss girder on the first cross beam, and reversely pushing the steel truss girder to be far away from the second cross beam; butting the guide beams; the steel truss girder is moved, specifically, the steel truss girder is dragged by a driving mechanism to be placed on the second cross beam; beam dismounting and beam falling are conducted, specifically, the guide beam is dismounted, and the steel truss beam falls and is placed on the bridge piers; and dismantling: dismantling the first bracket and the second bracket to finish the construction of the steel truss girder. The supporting structures are arranged on the two sides of the provincial road, then the steel truss girder is assembled on the supporting structures, and one end of the steel truss girder is dragged and driven to move to the pier on the other side, so that the safety in the construction process is improved, and the adverse effect on the life of residents is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of steel truss construction, and in particular to a method for installing a steel truss. Background Art

[0002] Steel trusses not only provide strong load-bearing capacity in bridge construction, but also have the advantages of convenient construction, beautiful appearance, and environmental protection. They are an indispensable structural form in modern bridge construction.

[0003] The existing technology often encounters the situation of being close to the provincial road when installing steel trusses. As the main passage of the city, the provincial road has heavy traffic. In addition, there is ultra-high voltage electricity (500KV) above the steel truss construction site, which is close to the ground. The traditional truss installation adopts the large-span bridge segment construction technology, which requires the use of lifting equipment for lifting construction. The operation of the lifting equipment will interfere with the provincial road or high voltage electricity, posing a safety risk. It will also affect the traffic of vehicles on the provincial road and have an adverse impact on residents' lives. Summary of the invention

[0004] In order to improve the safety during the installation of steel trusses and reduce the adverse effects on residents' lives, the present application provides a method for installing steel trusses.

[0005] The present application provides a method for installing a steel truss beam, which adopts the following technical solution: A method for installing a steel truss beam comprises the following steps: Support structure construction: erecting a first bracket at the bridge pier on one side of the provincial road and erecting a second bracket at the bridge pier on the other side of the provincial road, erecting a first crossbeam on the first bracket and erecting a second crossbeam flush with the first crossbeam on the second bracket; Assembling the steel truss beam: assemble the steel truss beam on the first cross beam, and then push the steel truss beam in the opposite direction away from the second cross beam through the driving mechanism; Guide beam docking: assemble the guide beam on the first cross beam and connect it with the steel truss beam so that the guide beam is located on the side of the steel truss beam close to the second cross beam; Moving the steel truss beam: the driving mechanism drags the steel truss beam and the guide beam toward the second cross beam, so that the front end of the guide beam rests on the second cross beam for support and positioning, and the steel truss beam and the guide beam continue to be dragged forward until the steel truss beam rests on the second cross beam; Beam removal and beam drop: Remove the guide beam, lift the steel truss beam upwards through the telescopic support members set on the bridge pier, remove the first cross beam and the second cross beam, and retract the telescopic support members to make the steel truss beam drop down and be placed on the bridge pier; Demolition: Remove the first and second supports to complete the construction of the steel truss.

[0006] By adopting the above technical scheme, the first bracket and the second bracket are firstly set up at the bridge piers on both sides of the provincial road, and then the first beam and the second beam are respectively set up on the first bracket and the second bracket, and the steel truss is assembled on the first beam, and the steel truss is pushed in the opposite direction away from the second beam by the driving mechanism, and the guide beam is assembled on the first beam and connected with the steel truss so that the guide beam is located on the side of the steel truss close to the second beam; the driving mechanism drags the steel truss and the guide beam toward the second beam, so that the front end of the guide beam is first placed on the second beam for support and positioning, and the steel truss and the guide beam continue to be dragged forward until the steel truss is placed on the second beam, the guide beam is removed, the steel truss is lifted upward by the telescopic support, and then the first beam and the second beam are removed, and the telescopic support is retracted so that the steel truss falls and is placed on the bridge pier, and the first bracket and the second bracket are removed, thereby completing the construction of the steel truss.

[0007] By setting up supporting structures on both sides of the provincial road, assembling steel trusses on the supporting structures, and then guiding them through guide beams, one end of the steel trusses is dragged and driven to the bridge pier on the other side. After the guide beams are removed, the steel trusses are installed on the bridge piers on both sides of the provincial road, and finally the supporting structures are removed. This allows the lifting equipment to be away from the provincial road and the ultra-high voltage electricity above the provincial road during the entire construction process, thereby reducing the probability of contact with the ultra-high voltage electricity and the impact on the traffic of vehicles on the provincial road, improving the safety of the construction process, and reducing the adverse effects on residents' lives.

[0008] The guide beam is light in weight, so the center of gravity moves toward the steel truss during the movement. Therefore, when the guide beam moves in the air, the gravity of the steel truss can support and position the guide beam. After the guide beam moves to the second crossbeam, it can support the steel truss, making the entire movement process more stable and improving the safety of construction.

[0009] After the steel truss is assembled, it is pushed in the opposite direction and away from the second cross beam to leave space for the guide beam to be spliced, so that the lifting equipment can be concentrated in one place when lifting the steel truss and the guide beam. At the same time, the requirements for the operating radius of the lifting equipment are reduced, the convenience of the construction process is improved, the construction efficiency is improved, and as the operating radius is reduced, the probability of contact with ultra-high voltage electricity is further reduced, further improving the safety of the construction process.

[0010] Optionally, the guide beam is formed by splicing multiple internodes, the bottoms of the multiple internodes are kept flush and the internode height gradually decreases as the distance from the steel truss increases, and when there are two internodes in contact with the second crossbeam, the internode farthest from the steel truss is removed.

[0011] By adopting the above technical scheme, the number of connected intervals can be reduced, so that a guide beam of the required length can be obtained, which improves the convenience during the construction process, and makes the guide beam of moderate length. It will not be too long to increase the weight of the guide beam and make it inconvenient to move the guide beam, or it will not be too short to reduce the guiding effect of the guide beam and reduce the safety during the construction process, thereby further improving the convenience and safety of the construction process at the same time.

[0012] After the two first internodes are placed on the second crossbeam, one internode can be removed, leaving only one internode for supporting and positioning the steel truss. At the same time, as the movement occurs, the next internode contacts the second crossbeam, and the above internode removal action is repeated. This can gradually reduce the force required to move the guide beam and the steel truss, shortening the time spent on the moving process and improving construction efficiency while satisfying the need to guide and support the steel truss.

[0013] The heights of multiple inter-nodes are gradually reduced, which reduces the weight of the inter-nodes and also makes the center of gravity move toward the steel truss during the movement of the guide beam and the steel truss, making the movement more stable and improving the safety during the construction process.

[0014] Optionally, a deviation correction component is provided on the first bracket, and the deviation correction component includes: A plurality of detectors are arranged on the first bracket and located on both sides of the steel truss and are used to detect the distance between the steel truss and the steel truss; A plurality of deflection-correcting oil cylinders are arranged on the first bracket and are located on both sides of the steel truss and are arranged at intervals along the moving direction of the steel truss. The deflection-correcting oil cylinders are electrically connected to the detector and are used to push the steel truss to move for deflection correction.

[0015] By adopting the above technical solution, the steel truss is prone to deviation during movement, thereby reducing the safety during construction; multiple detectors are used to detect the distance between the steel truss and the detector. When a certain steel truss approaches the detector, the detector detects that the distance is less than the specified data, so the correction cylinder is started to push the detector away so that the steel truss continues to maintain a certain distance from the detector, thereby reducing the probability of the steel truss deflecting and improving the safety during construction.

[0016] Optionally, the driving mechanism includes: A driving block is slidably arranged on the first cross beam along the sliding direction of the steel truss beam; A fixed block, arranged on the first crossbeam and located on a side of the driving block close to the second crossbeam; An adjusting block is placed on the first cross beam and abuts against the driving block and the fixing block for positioning; A pushing cylinder is placed on the first cross beam and the cylinder body abuts against the steel truss beam, the piston rod of the pushing cylinder abuts against the driving block and the adjusting blocks of different lengths or numbers are replaced in sequence to push the steel truss beam away from the second cross beam; The pulling assembly is arranged on the second bracket and is used for pulling the steel truss beam close to the second cross beam.

[0017] By adopting the above technical scheme, when the steel truss is pushed back, the fixed block and the pushing cylinder are installed on the first beam, so that the pushing cylinder body abuts against the steel truss and the piston rod is in a retracted state, the adjusting block is slidably installed on the first beam, and then the adjusting block is placed on the first beam and abuts against the driving block and the fixed block, the pushing cylinder piston rod is extended to push the steel truss away from the second beam, and then the pushing cylinder piston rod is retracted, and then a longer adjusting block is replaced, or the adjusting block of the same length is continued to be placed, so that the adjusting block abuts against the pushing cylinder piston rod, and then the process is repeated to drive the steel truss to move, thereby realizing the movement of the steel truss, improving the stability and convenience of the steel truss during the movement, and improving the construction efficiency and safety of the steel truss.

[0018] After the reverse push of the steel truss is completed, the pushing cylinder, driving block, fixing block and adjusting block are removed, and then the guide beam is connected to the steel truss. The towing assembly is started to drive the steel truss and the guide beam toward the second cross beam, thereby driving the steel truss to move, thereby improving the construction efficiency and safety of the steel truss.

[0019] Optionally, the dragging component includes: The rear anchor point is set on the steel truss; Anchor cable, set on the rear anchor point; The dragging jack is arranged on the second bracket and is used for reciprocatingly clamping the anchor cable to drive the anchor cable to move.

[0020] By adopting the above technical scheme, the dragging jack clamps the anchor cable and moves forward to drive the anchor cable to move, and the movement of the anchor cable drives the rear anchor point and the steel truss to move. The dragging jack releases the clamping and moves back, and then the dragging jack continues to clamp the anchor cable and moves forward, so as to repeat the small distance pulling of the steel truss and guide beam in sequence, thereby improving the safety and efficiency of the movement of the steel truss and guide beam, and improving the safety and efficiency of the steel truss construction.

[0021] Optionally, the driving mechanism includes: Two guide wheels are rotatably arranged on the first bracket and the second bracket; Two sets of driving jacks are respectively arranged on the first bracket and the second bracket and located between the two guide wheels; The steel wire rope passes through two sets of driving jacks and around two guide wheels and is connected to the steel truss through a connecting assembly. The two sets of driving jacks respectively reciprocately clamp the steel wire rope to drive the steel wire rope to move and are respectively used to make the steel truss girder approach or move away from the second cross beam.

[0022] By adopting the above technical scheme, the two guide wheels are first rotatably installed on the first bracket and the second bracket respectively, and then the two groups of driving jacks are fixedly installed on the first bracket and the second bracket and located between the two guide wheels. The steel wire rope passes through the two groups of driving jacks and then bypasses the two guide wheels. When the steel truss is assembled, the steel wire rope is connected to the steel truss through the connecting component. After the steel truss is assembled, one group of driving jacks drives the steel wire rope to move, so that the steel truss is away from the second beam. Conversely, the other group of driving jacks drives the steel truss to approach the second beam, thereby simultaneously achieving reverse pushing of the steel truss and pushing the steel truss to approach the second beam to complete the construction. After the construction is completed, the steel wire rope and the steel truss are removed, so that there is no need to remove other structures during the entire construction process, which greatly improves the convenience and safety of the construction process and improves the efficiency and safety of the construction.

[0023] Two sets of driving jacks are arranged between two guide wheels, that is, the two guide wheels can limit the position when driving the steel truss to move. Therefore, the two guide wheels can be designed within the maximum moving range, and the driving jack is located within the moving range, that is, the driving jack can be installed on the first bracket and the second bracket that have been installed, without installing other auxiliary structures. At the same time, the movement of the steel truss in two directions can be achieved through a steel wire rope, and the installation of the steel wire rope is also very convenient and safe, which greatly improves the convenience of the construction process and improves the construction efficiency and safety.

[0024] Optionally, the connection component includes: A fixed anchor is arranged on the steel truss and has through holes for the two ends of the steel wire rope to pass through; The fixing parts are arranged on both ends of the steel wire rope and are used to fix the steel wire rope.

[0025] By adopting the above technical solution, the two ends of the wire rope are passed through the two through holes on both sides of the fixed anchor respectively, and then the two ends of the wire rope are fixed by the fixing parts. In addition, it is also convenient to tension the wire rope during the installation process, thereby realizing the fixed connection between the wire rope and the steel truss, improving the convenience and installation quality during the connection process, and improving the construction efficiency and safety.

[0026] Optionally, the steel truss beam and the guide beam are both slidably arranged on the first bracket and the second bracket through a sliding mechanism, and the sliding mechanism includes: A supporting steel plate is arranged on the first cross beam and the second cross beam and has a length direction parallel to the sliding direction of the steel truss beam, and the supporting steel plate is provided with a plurality of receiving holes for filling lubricating grease along its length direction; A plurality of sliding shoes are arranged on the steel truss beam or the guide beam through a fixing assembly and are slidably arranged on the supporting steel plate along the length direction of the supporting steel plate.

[0027] By adopting the above technical solution, the supporting steel plates are first fixedly installed on the top of the first bracket and the second bracket, and then a layer of lubricating grease is applied on the surface of the supporting steel plate, and the lubricating grease can be filled into the receiving hole, and then the sliding shoe is placed on the supporting steel plate, and then the steel truss is placed on the sliding shoe, and then the fixing assembly fixes the sliding shoe to the steel truss, thereby realizing the fixed installation of the steel truss on multiple sliding shoes, the movement of the steel truss drives multiple sliding shoes to move on the supporting steel plate, and at the same time, the guide is fixedly installed on multiple sliding shoes by the same method, thereby greatly reducing the resistance of the steel truss and the guide during movement, and improving construction efficiency and safety.

[0028] Optionally, the fixing component includes: The fixed frame is buckled on the steel truss; A fixing rod is arranged on the sliding shoe and extends obliquely upward to the fixing frame; A fixing plate, which is arranged on the fixing rod and is positioned against the lower surface of the steel truss; The fixing screw rod is arranged on the fixing frame, passes through the fixing plate and is threadedly connected with a fixing nut which abuts against the fixing plate for positioning.

[0029] By adopting the above technical solution, the fixing frame is buckled onto the steel truss, and the fixing screw passes through the fixing plate, and then the fixing nut is threadedly connected to the fixing screw and rests on the fixing plate for positioning, thereby achieving fixed connection between the sliding shoe and the steel truss. At the same time, the fixing nut is twisted to disengage the fixing screw, and the fixing frame can be removed, so that the fixing screw is disengaged from the fixing plate, thereby achieving the separation of the steel truss and the sliding shoe.

[0030] Optionally, the length of the second bracket is smaller than the length of the first bracket.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up supporting structures on both sides of the provincial road, assembling steel trusses on the supporting structures, and then guiding them through guide beams, one end of the steel trusses is dragged and driven to the bridge pier on the other side. After removing the guide beams, the steel trusses are installed on the bridge piers on both sides of the provincial road. Finally, the supporting structures are removed. This allows the lifting equipment to be away from the provincial road and the ultra-high voltage electricity above the provincial road during the entire construction process, thereby reducing the probability of contact with ultra-high voltage electricity and the impact on the traffic of vehicles on the provincial road, improving the safety of the construction process, and reducing the adverse effects on residents' lives.

[0032] 2. The guide beam is used to make the center of gravity move toward the steel truss during the movement. Therefore, when the guide beam moves in the air, the gravity of the steel truss can support and position the guide beam. After the guide beam moves to the second crossbeam, it can support the steel truss, making the entire movement process more stable and improving the safety of construction.

[0033] 3. After the steel truss is assembled, it is pushed in the opposite direction away from the second cross beam to leave space for the guide beam to be spliced, so that the lifting equipment can be concentrated in one place when lifting the steel truss and the guide beam. At the same time, the requirements for the operating radius of the lifting equipment are reduced, the convenience of the construction process is improved, the construction efficiency is improved, and as the operating radius is reduced, the probability of contact with ultra-high voltage electricity is further reduced, further improving the safety of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the first embodiment of the installation method; Figure 2 It is a partial structural schematic diagram of the first embodiment of the installation method; Figure 3 yes Figure 2 The enlarged schematic diagram of the middle A part; Figure 4 is a schematic diagram of the structure of the drag assembly in the first embodiment of the installation method; Figure 5 It is a structural schematic diagram of the driving mechanism in the second embodiment of the installation method.

[0035] Figure numerals: 1. Bridge pier; 11. First bracket; 12. Second bracket; 13. First crossbeam; 14. Second crossbeam; 15. Steel truss; 16. Guide beam; 17. Internode; 2. Sliding mechanism; 21. Support steel plate; 22. Sliding shoe; 23. Receiving hole; 3. Fixing assembly; 31. Fixing frame; 32. Fixing rod; 33. Fixing plate; 34. Fixing screw; 4. Driving mechanism; 41. Driving block; 42. Fixing block; 43. Adjusting block; 44. Pushing cylinder; 5. Towing assembly; 51. Rear anchor point; 52. Anchor cable; 53. Towing jack; 61. Guide wheel; 62. Driving jack; 63. Wire rope; 7. Connecting assembly; 71. Fixed anchor; 72. Fixing part. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The embodiment of the present application discloses a method for installing a steel truss.

[0038] Embodiment 1 Reference Figure 1 and Figure 2 , the installation method of the steel truss beam comprises the following steps: Support structure construction: erect a first support 11 at the pier 1 on one side of the provincial road and erect a second support 12 at the pier 1 on the other side of the provincial road, the length directions of the first support 11 and the second support 12 are parallel and the length of the first support 11 is greater than the length of the second support 12, the tops of the first support 11 and the second support 12 are flush and located below the top of the pier 1; erect a first beam 13 on the top of the first support 11 and erect a second beam 14 flush with the first beam 13 on the top of the second support 12, the upper surface of the first beam 13 is located above the pier 1, and the length directions of the first beam 13 and the second beam 14 are parallel.

[0039] Construction of the steel truss beam 15: assemble the steel truss beam 15 on the first cross beam 13, and push the steel truss beam 15 in the opposite direction away from the second cross beam 14 through the driving mechanism 4; Construction of the guide beam 16: Assemble the guide beam 16 on the first cross beam 13 and connect it with the steel truss beam 15, so that the guide beam 16 is located on the side of the steel truss beam 15 close to the second cross beam 14; Moving the steel truss beam 15: the driving mechanism 4 drags the steel truss beam 15 and the guide beam 16 toward the second cross beam 14, so that the front end of the guide beam 16 rests on the second cross beam 14 for support and positioning, and the steel truss beam 15 and the guide beam 16 continue to be dragged forward until the steel truss beam 15 rests on the second cross beam 14; Beam removal and beam drop: remove the guide beam 16, and lift the steel truss beam 15 upwards by means of a telescopic support member provided on the pier 1. The telescopic support member is a telescopic oil cylinder and multiple telescopic supports are provided at intervals; then remove the first cross beam 13 and the second cross beam 14, and retract the telescopic support member so that the steel truss beam 15 drops and is placed on the pier 1; Dismantling: The first bracket 11 and the second bracket 12 are dismantled to complete the construction of the steel truss 15 .

[0040] Reference Figure 1 and Figure 2 The steel truss 15 is formed by splicing multiple sections, and the guide beam 16 is formed by splicing multiple internodes 17. The connection between the steel trusses 15, the connection between the multiple internodes 17, and the connection between the steel trusses 15 and the internodes 17 are all existing technologies and will not be repeated here; the bottoms of the multiple internodes 17 remain flush and the height of the internode 17 gradually decreases as the distance from the steel truss 15 increases, so that the weight of the multiple internodes 17 gradually decreases as the distance from the steel truss 15 increases, and the internode 17 connected to the steel truss 15 is the heaviest and the internode 17 farthest from the steel truss 15 is the lightest.

[0041] When there are two internodes 17 in contact with the second cross beam 14, the internode 17 farthest from the steel truss 15 is removed, and the steel truss 15 and the guide beam 16 continue to move and then the internode 17 is removed, so as to support the steel truss 15 and reduce the resistance generated during the movement, and make the center of gravity of the steel truss 15 and the guide beam 16 move toward the steel truss 15, further improving the safety and efficiency during the movement.

[0042] Reference Figure 1 , Figure 2 The steel truss beam 15 and the guide beam 16 are both slidably arranged on the first cross beam 13 and the second cross beam 14 through the sliding mechanism 2. The sliding mechanism 2 connected to the steel truss beam 15 is taken as an example for explanation below.

[0043] Reference Figure 2 and Figure 3 The sliding mechanism 2 includes a supporting steel plate 21 and a plurality of sliding shoes 22. The plurality of supporting steel plates 21 are respectively fixedly mounted on the upper surfaces of the first cross beam 13 and the second cross beam 14. The length direction of the supporting steel plates 21 is parallel to the length direction of the first bracket 11. Two supporting steel plates 21 are arranged on the first bracket 11 and the second bracket 12 along the length direction perpendicular to the first bracket 11. Receiving holes 23 penetrating through both ends of the steel plates are opened on the upper surface of the supporting steel plates 21, and a plurality of receiving holes 23 are arranged at intervals along the length direction perpendicular to the supporting steel plates 21.

[0044] Multiple sliding shoes 22 are connected to the steel truss 15 through the fixing component 3. The bottom of the sliding shoe 22 is placed on the supporting steel plate 21 and slides along the length direction of the supporting steel plate 21. Before placing the sliding shoe 22, lubricating grease is first applied to the supporting steel plate 21 so that the lubricating grease is filled into the receiving hole 23 for storage. The lubricating grease in the receiving hole 23 achieves a lubricating effect when the sliding shoe 22 moves, thereby reducing the resistance of the sliding shoe 22 when moving.

[0045] After applying lubricating grease, multiple sliding shoes 22 are placed on the supporting steel plate 21, and then the steel truss 15 is placed on the multiple sliding shoes 22 for assembly. During the assembly, the sliding shoes 22 and the steel truss 15 are fixedly connected through the fixing component 3; alternatively, the steel truss 15 can be assembled first and the steel truss 15 is supported by temporary support blocks from below during assembly. During the assembly, multiple sliding shoes 22 are placed on the supporting steel plate 21, and then multiple temporary oil cylinders are placed on the first crossbeam 13 to lift the steel truss 15 upwards, the multiple temporary support blocks are removed, and the temporary oil cylinders are started to place the steel truss 15 on the multiple sliding shoes 22, and finally the sliding shoes 22 and the steel truss 15 are connected through the fixing component 3.

[0046] The fixing assembly 3 includes a fixing frame 31, a fixing rod 32, a fixing plate 33, and a fixing screw 34. The fixing frame 31 is a steel frame structure with an opening facing downward and in a C shape. The fixing frame 31 is buckled downward on the frame of the steel truss 15 and is located on one side of the sliding shoe 22. The fixing rod 32 is fixedly installed on the side wall of the sliding shoe 22 and extends upwardly to the bottom of the sliding shoe 22; the fixing plate 33 is fixedly installed on the top of the fixing rod 32 and is in a horizontal state and rests on the lower surface of the steel truss 15. The fixing screw 34 is fixedly installed on the fixing rod 32 and is vertically arranged downward. At the same time, two fixing screws 34 are provided and are located on both sides of the connection between the fixing frame 31 and the steel truss 15. The two fixing screws 34 are slidably passed through the fixing plate 33 and are threadedly connected with fixing nuts that are pressed against the lower surface of the fixing plate 33 for positioning.

[0047] Reference Figure 1 and Figure 3 , buckle the fixing frame 31 onto the steel truss 15 frame, so that the two fixing screws 34 slide through the fixing plate 33, and then thread the fixing nuts onto the fixing screws 34, so that the fixing nuts are pressed against the lower surface of the fixing plate 33 for positioning, so as to achieve the fixed connection of multiple sliding shoes 22 to the steel truss 15. At the same time, the same method can be used to fix multiple sliding shoes 22 to the guide beam 16. Therefore, when the steel truss 15 and the guide beam 16 move, the multiple sliding shoes 22 are driven to move, thereby greatly reducing the resistance generated by the movement and improving the construction efficiency and safety; and after the fixing nuts are twisted to disengage from the fixing screws 34, the sliding shoes 22 can be separated from the steel truss 15 or the guide beam 16.

[0048] A correction component is provided on the first bracket 11, and multiple correction components are arranged at intervals along the length direction of the first bracket 11. The correction component includes multiple detectors and multiple correction cylinders. Multiple detectors are fixedly installed on the first bracket 11 and are located on both sides of the steel truss 15, so as to detect the distance between the detector and the steel truss 15; multiple correction cylinders are fixedly installed on the first bracket 11 and are located on both sides of the steel truss 15, the piston rods of the correction cylinders are horizontally extended to the side close to the steel truss 15, and the movement direction of the correction cylinder piston rods is perpendicular to the movement direction of the steel truss 15; a controller for controlling the correction cylinder is fixedly installed on the first bracket 11, the detector detects the distance between itself and the steel truss 15 and transmits it to the controller, and the controller controls the correction cylinder according to the distance to start and push the steel truss 15 to move, so as to realize the correction of the steel truss 15, so that the steel truss 15 can move along the planned route.

[0049] Reference Figure 1 and Figure 3 , two driving mechanisms 4 are arranged along the direction perpendicular to the moving direction of the steel truss 15, and the driving mechanism 4 includes a driving block 41, a fixed block 42, an adjusting block 43, a pushing cylinder 44 and a pulling assembly 5. The driving block 41 is slidably installed on the upper surface of the supporting steel plate 21 along the length direction of the supporting steel plate 21, and the driving block 41 is located on the side of the steel truss 15 close to the second crossbeam 14; a plug-in hole is opened on the first crossbeam 13 on the outside of the supporting steel plate 21, and the fixed block 42 is plugged into the plug-in hole and fixed by screws or plug-ins, and the fixed block 42 extends above the supporting steel plate 21; the adjusting block 43 is placed on the first crossbeam 13 and rests on the driving block 41 and the fixed block 42 for positioning, the cylinder body of the pushing cylinder 44 is placed on the supporting steel plate 21 and the cylinder body rests on the steel truss 15 for positioning, and at the same time, the piston rod of the pushing cylinder 44 rests on the driving block 41 for positioning.

[0050] The pushing cylinder 44 starts the piston rod to extend, thereby pushing the steel truss 15 away from the second bracket 12, and the piston rod of the pushing cylinder 44 retracts away from the driving block 41, and replaces the adjusting block 43 with a longer length, or reinserts an adjusting block 43, at which time the length of the adjusting block 43 is just the stroke of the pushing cylinder 44, and the piston rod of the pushing cylinder 44 continues to extend to push the steel truss 15 away from the second bracket 12, and continues to repeat, so as to achieve reverse pushing of the steel truss 15 away from the second bracket 12, so as to leave a position for the guide beam 16 to be spliced, and then it is necessary to remove the driving block 41, the fixing block 42, the adjusting block 43, and the pushing cylinder 44, and then connect the guide beam 16 to the steel truss 15, so that after the guide beam 16 is spliced, it can be slidably installed on the supporting steel plate 21 located on the first crossbeam 13 through the sliding shoe 22.

[0051] Reference Figure 1 and Figure 4The towing assembly 5 is arranged on the second cross beam 14 and is used to drag the steel truss 15 close to the second cross beam 14. The towing assembly 5 includes a rear anchor point 51, an anchor cable 52 and a towing jack 53. The rear anchor point 51 is fixedly installed at the bottom of the steel truss 15; a plurality of anchor cables 52 are arranged at intervals and the anchor is anchored on the rear anchor point 51. The fixed connection method adopts the anchor anchoring method in the prior art, or other fixing methods can be adopted to achieve fixed connection. For example, the clamping sleeve used when using the pre-tightened steel strand is tower-shaped and elastic. The clamping sleeve is arranged on the anchor cable 52. When the anchor cable 52 moves, the clamping sleeve is pulled to clamp the anchor cable 52, so that the anchor cable 52 and the rear anchor point 51 are fixedly connected. When the anchor cable 52 is not under force, the clamping sleeve can be easily removed to realize the disassembly of the anchor cable 52 and the rear anchor point 51.

[0052] The dragging jack 53 is fixedly installed on the second bracket 12, and multiple anchor cables 52 all pass through the dragging jack 53. The dragging jack 53 has the same structure as the tensioning jack in the prior art. The dragging jack 53 cooperates with the oil pump. The dragging jack 53 is divided into a front jack and a rear jack. The front jack first clamps and pushes multiple anchor cables 52 forward, and then the front jack releases the clamping of the anchor cables 52 and moves back. At the same time, the rear jack clamps the anchor cables 52 forward, so as to alternately pull the steel truss 15 step by step to move, so as to realize the movement of the steel truss 15 to the second bracket 12.

[0053] The working principle of the embodiment of the present application is as follows: The first bracket 11, the second bracket 12, the first beam 13 and the second beam 14 are sequentially erected, the steel truss 15 is assembled on the first beam 13, and the driving mechanism 4 is installed at the same time, and the steel truss 15 is pushed in the reverse direction away from the second beam 14 by the driving mechanism 4; the guide beam 16 is assembled on the first beam 13 and connected to the steel truss 15; the dragging assembly 5 drags the steel truss 15 and the guide beam 16 toward the second beam 14 and onto the second beam 14; the guide beam 16 is removed, the telescopic support lifts the steel truss 15 upward, and then the first beam 13 and the second beam 14 are removed, the telescopic support retracts to make the steel truss 15 fall and be placed on the pier 1, and the first bracket 11 and the second bracket 12 are removed, thereby completing the construction of the steel truss 15, thereby improving the safety and efficiency of the construction process.

[0054] Embodiment 2 Reference Figure 1 and Figure 5The difference between this embodiment and embodiment 1 is that the driving mechanism 4 includes two guide wheels 61, two groups of driving jacks 62 and a wire rope 63. The two guide wheels 61 are rotatably mounted on the first bracket 11 and the second bracket 12 respectively and are in a horizontal state. The axis of the guide wheel 61 is perpendicular to the length direction of the first bracket 11; the two groups of driving jacks 62 are fixedly mounted between the first bracket 11 and the second bracket 12 respectively and are located between the two guide wheels 61. The driving jack 62 located on the first bracket 11 is arranged below the driving jack 62 located on the second bracket 12. At the same time, each group of driving jacks 62 can have only one or multiple driving jacks 62 are arranged at intervals along the moving direction of the steel truss 15.

[0055] The steel wire rope 63 passes through two sets of driving jacks 62 in sequence and around two guide wheels 61, and then both ends are connected to the steel truss 15 through the connecting assembly 7. The two guide wheels 61 are used to guide the steel wire rope 63 when it moves, and multiple steel wire ropes 63 are arranged at intervals.

[0056] Reference Figure 1 , Figure 4 and Figure 5 The structure of the driving jack 62 is the same as that of the dragging jack 53. The driving jack 62 located on the first bracket 11 starts to continuously clamp the driving wire rope 63 and move it close to the second bracket 12, so that the wire rope 63 located below the axis of the guide wheel 61 moves close to the second bracket 12. The wire rope 63 changes direction through the guide wheel 61, so that the wire rope 63 located above the guide wheel 61 moves away from the second bracket 12, that is, the steel truss 15 is driven away from the second bracket 12, so as to achieve the reverse push of the steel truss 15 to move. Conversely, the driving jack 62 located on the second bracket 12 starts to continuously clamp the driving wire rope 63 and move it close to the second bracket 12, so that the wire rope 63 located above the guide wheel 61 moves close to the second bracket 12, that is, the steel truss 15 is driven close to the second bracket 12, so as to achieve the dragging of the steel truss 15 to the second crossbeam 14.

[0057] The connecting assembly 7 includes a fixing anchor 71 and a fixing member 72. The fixing anchor 71 is fixedly installed on the lower surface of the steel truss 15 and is provided with through holes for the two ends of the steel wire rope 63 to pass through. After the two ends of the steel wire rope 63 pass through the two through holes, the fixing member 72 is fixedly installed on the steel wire rope 63 to fix it. The structure of the fixing member 72 is the same as the anchor structure for fixing the anchor cable 52 to the rear anchor point 51. The steel wire rope 63 can be fixedly installed on the fixing anchor 71 and can be removed later. After the construction is completed, the steel wire rope 63 can be separated from the fixing anchor 71 after removing the two fixing members 72, thereby realizing the separation of the driving mechanism 4 from the steel truss 15.

[0058] The working principle of the embodiment of the present application is as follows: After the first bracket 11 and the second bracket 12 are erected, the two sets of driving jacks 62 are fixedly installed on the first bracket 11 and the second bracket 12 respectively, and the two guide wheels 61 are installed on the first bracket 11 and the second bracket 12 at the same time. When assembling the steel truss 15, the fixing anchor 71 is fixedly installed on the steel truss 15, and the steel wire rope 63 passes through the two sets of driving jacks 62 and then bypasses the two guide wheels 61 and passes through the two connecting holes. The fixing parts 72 fix the two ends of the steel wire rope 63, and the two sets of driving jacks 62 are respectively started to reverse the steel truss 15 and drive the steel truss 15 to be placed on the second crossbeam 14. Therefore, the reverse and forward movements of the steel truss 15 can be achieved through one structure, which improves the convenience of construction and improves the construction efficiency and safety.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for installing a steel truss, characterized in that: The following steps are involved: Support structure construction: erecting a first bracket (11) at a bridge pier (1) located on one side of the provincial road and erecting a second bracket (12) at a bridge pier (1) located on the other side of the provincial road, erecting a first crossbeam (13) on the first bracket (11) and erecting a second crossbeam (14) flush with the first crossbeam (13) on the second bracket (12); Assembling the steel truss beam (15): assembling the steel truss beam (15) on the first cross beam (13), and then pushing the steel truss beam (15) in the opposite direction away from the second cross beam (14) through the driving mechanism (4); Guide beam (16) docking: assembling the guide beam (16) on the first cross beam (13) and connecting it to the steel truss beam (15) so that the guide beam (16) is located on the side of the steel truss beam (15) close to the second cross beam (14); Moving the steel truss beam (15): the driving mechanism (4) drags the steel truss beam (15) and the guide beam (16) toward the second cross beam (14), so that the front end of the guide beam (16) rests on the second cross beam (14) for support and positioning, and the steel truss beam (15) and the guide beam (16) continue to be dragged forward until the steel truss beam (15) rests on the second cross beam (14); Beam removal and beam drop: the guide beam (16) is removed, the steel truss beam (15) is lifted upwards by a telescopic support member arranged on the bridge pier (1), the first cross beam (13) and the second cross beam (14) are removed, and the telescopic support member is retracted so that the steel truss beam (15) is dropped and placed on the bridge pier (1); Dismantling: The first support (11) and the second support (12) are dismantled to complete the construction of the steel truss (15).

2. The method for installing a steel truss according to claim 1, characterized in that: The guide beam (16) is formed by splicing a plurality of internodes (17), the bottoms of the plurality of internodes (17) remain flush and the height of the internodes (17) gradually decreases as the distance from the steel truss (15) increases; when there are two internodes (17) in contact with the second cross beam (14), the internode (17) farthest from the steel truss (15) is removed.

3. The method for installing a steel truss according to claim 1, characterized in that: The first bracket (11) is provided with a deviation correction component, and the deviation correction component comprises: A plurality of detectors, arranged on the first bracket (11) and located on both sides of the steel truss (15) and used to detect the distance between the steel truss (15); A plurality of deflection correction oil cylinders are arranged on the first bracket (11) and are located on both sides of the steel truss (15) and are arranged at intervals along the moving direction of the steel truss (15); the deflection correction oil cylinders are electrically connected to the detector and are used to push the steel truss (15) to move for deflection correction.

4. The method for installing a steel truss according to claim 1, characterized in that: The driving mechanism (4) comprises: A driving block (41) is slidably disposed on the first cross beam (13) along a sliding direction of the steel truss beam (15); A fixed block (42) is arranged on the first crossbeam (13) and is located on a side of the driving block (41) close to the second crossbeam (14); An adjusting block (43) is placed on the first crossbeam (13) and abuts against the driving block (41) and the fixing block (42) for positioning; A pushing cylinder (44) is placed on the first cross beam (13) and the cylinder body abuts against the steel truss beam (15); the piston rod of the pushing cylinder (44) abuts against the driving block (41) and the adjusting blocks (43) of different lengths or numbers are replaced in sequence to achieve pushing the steel truss beam (15) away from the second cross beam (14); A dragging assembly (5) is arranged on the second bracket (12) and is used to drag the steel truss beam (15) close to the second cross beam (14).

5. The method for installing a steel truss according to claim 4, characterized in that: The pulling assembly (5) comprises: A rear anchor point (51) is arranged on the steel truss (15); An anchor cable (52) is arranged on the rear anchor point (51); The towing jack (53) is arranged on the second bracket (12) and is used to reciprocately clamp the anchor cable (52) to drive the anchor cable (52) to move.

6. The method for installing a steel truss according to claim 1, characterized in that: The driving mechanism (4) comprises: Two guide wheels (61) rotatably disposed on the first bracket (11) and the second bracket (12); Two sets of driving jacks (62) are respectively arranged on the first bracket (11) and the second bracket (12) and are located between the two guide wheels (61); The steel wire rope (63) passes through two sets of driving jacks (62) and around two guide wheels (61), and is connected to the steel truss (15) through a connecting assembly (7). The two sets of driving jacks (62) respectively reciprocately clamp the steel wire rope (63) to drive the steel wire rope (63) to move and are respectively used to achieve the steel truss (15) approaching or moving away from the second cross beam (14).

7. The method for installing a steel truss according to claim 6, characterized in that: The connection component (7) comprises: A fixed anchor (71) is arranged on the steel truss (15) and is provided with through holes for passing two ends of the steel wire rope (63); The fixing members (72) are arranged on both ends of the steel wire rope (63) and are used to fix the steel wire rope (63).

8. The method for installing a steel truss according to claim 1, characterized in that: The steel truss beam (15) and the guide beam (16) are both slidably arranged on the first bracket (11) and the second bracket (12) via a sliding mechanism (2), wherein the sliding mechanism (2) comprises: A support steel plate (21) is arranged on the first crossbeam (13) and the second crossbeam (14) and has a length direction parallel to the sliding direction of the steel truss (15); the support steel plate (21) is provided with a plurality of receiving holes (23) for filling lubricating grease along its length direction; A plurality of sliding shoes (22) are all arranged on the steel truss (15) or the guide beam (16) through a fixing assembly (3) and are slidably arranged on the supporting steel plate (21) along the length direction of the supporting steel plate (21).

9. The method for installing a steel truss according to claim 8, characterized in that: The fixing component (3) comprises: A fixing frame (31) is buckled on the steel truss (15); A fixing rod (32) is disposed on the sliding shoe (22) and extends obliquely upward to the fixing frame (31); A fixing plate (33) is arranged on the fixing rod (32) and abuts against the lower surface of the steel truss (15) for positioning; A fixing screw rod (34) is disposed on the fixing frame (31), passes through the fixing plate (33), and is threadedly connected to a fixing nut that abuts against the fixing plate (33) for positioning.

10. The method for installing a steel truss according to claim 1, characterized in that: The length of the second bracket (12) is shorter than the length of the first bracket (11).

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