Installation method of steel truss bridge across river

Abstract

The present application relates to a method for installing a river-crossing steel truss bridge, which relates to the field of bridge construction and aims to solve the problem of low installation efficiency of steel truss bridges. The method comprises the following steps: constructing piles in the middle of a river channel, transporting steel truss bridges from both sides of the river channel to the piles, and providing a calibration mechanism at the top of the piles for accurately docking two sets of steel truss bridges; step two: constructing a scaffolding on both sides of the river channel, with a detachable conveying mechanism provided on the scaffolding, and transporting the steel truss bridges via the conveying mechanism; step three: hoisting the steel truss bridge via a hoisting machine, so that the steel truss bridge is placed on the conveying mechanism; step four: accurately docking the two sets of steel truss bridges on the piles via the calibration mechanism. After the steel truss bridge is installed, the conveying mechanism is disassembled and the steel truss bridge is fixed. The present application has the effect of making the steel truss bridge more stable during installation, thereby improving installation efficiency.

Description

Technical Field

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

[0002] With increasing attention paid to bridge construction speed and environmental impact in China, steel bridges are becoming widely used. Steel truss bridges offer advantages such as light weight, low height, compact member sizes, convenient transportation, high-quality construction, rapid erection, minimal impact on navigation, and a rational, safe, and feasible structural form. They are also easy to modify and maintain during operation, resulting in significant economic and social benefits.

[0003] At present, the construction of steel truss bridge structures across rivers usually adopts large-scale lifting machinery. Generally, piles are built in the river first. After the truss sections are assembled on site, large-scale lifting machinery is used to stand on the river bank or the constructed structure to lift the steel truss bridge.

[0004] Regarding the above-mentioned related technologies, the inventors found the following defects: when the lifting machinery lifts the assembled steel truss bridge, the steel truss bridge will swing in the air, making it difficult to accurately place it on the piles in the river channel. Multiple adjustments and manual docking are required, which is complicated to operate and affects construction efficiency. Summary of the Invention

[0005] In order to improve the installation efficiency of steel truss bridges, the present application provides an installation method for a river-spanning steel truss bridge.

[0006] This application provides a method for installing a river-crossing steel truss bridge, which adopts the following technical solution:

[0007] A method for installing a river-spanning steel truss bridge comprises the following steps:

[0008] Step 1: Build piles in the middle of the river channel, and transport steel truss bridges from both sides of the river channel to the piles, so that one end of the steel truss bridge is placed on the piles and the other end is placed on the river bank. A calibration mechanism is installed at the top of the piles to ensure that the two sets of steel truss bridges are accurately connected;

[0009] Step 2: Build a scaffolding on both sides of the river. A detachable conveying mechanism is provided on the scaffolding to convey the steel truss bridge, ensuring that the steel truss bridge remains horizontal during the conveying process.

[0010] Step 3: Use a lifting machine to lift the steel truss bridge, place the steel truss bridge on the conveying mechanism, and transport the steel truss bridge to the erection piles through the conveying mechanism;

[0011] Step 4: Use the calibration mechanism to accurately connect the two sets of steel truss bridges on the piles. After the installation of the steel truss bridge is completed, dismantle the conveying mechanism and fix the steel truss bridge.

[0012] Optionally, the calibration mechanism includes a fixed frame and limiting components arranged on both sides of the fixed frame, the fixed frame is fixedly connected to the top of the erection pile, the fixed frame is arranged along a conveying direction perpendicular to the conveying mechanism, and a space for placing a steel truss bridge is formed between the two limiting components.

[0013] By adopting the above technical solution, one end of the steel truss bridge is moved to the erection pile and then placed on the fixed frame. The end position of the steel truss bridge is positioned by the limit components on both sides of the fixed frame, so that the position of the steel truss bridge after transportation is more accurate, thereby facilitating the docking and installation of the two groups of steel truss bridges.

[0014] Optionally, the limiting assembly includes a connecting rod and a positioning seat, the fixing frame is provided with a sliding groove that is slidably adapted to the connecting rod, the positioning seat is arranged at one end of the connecting rod, and the fixing frame is provided with a positioning assembly for fixing the connecting rod.

[0015] By adopting the above technical solution, the positioning seat is pulled to drive the connecting rod to move in the slide groove on the fixed frame, thereby maintaining the stability of the positioning seat during movement. In addition, a positioning component is set on the fixed frame to fix the position of the connecting rod, so that the position of the positioning seat is accurately fixed after movement.

[0016] Optionally, both ends of the positioning seat are provided with inclined surfaces on their sides close to each other, and the inclined surfaces at the same end of the two positioning seats form an opening, and the diameter of the opening is larger than the distance between the two positioning seats.

[0017] By adopting the above technical solution, the steel truss bridge is inserted between the two positioning seats from the opening after transportation, and then placed on the fixed frame. Since the diameter of the opening is larger than the distance between the two positioning seats, the steel truss bridge can enter between the two positioning seats more accurately during the transportation process, avoiding multiple adjustments to the transportation angle of the steel truss bridge, which affects the construction efficiency.

[0018] Optionally, the positioning assembly includes a plug-in block and a sliding rod, the sliding rod is slidably set on the fixed frame, the plug-in block is set on the sliding rod, a slot is opened on the connecting rod, and the plug-in block is plugged into and adapted to the slot.

[0019] By adopting the above technical solution, the sliding rod slides on the fixing frame to disengage the plug-in block from the slot. When the connecting rod slides, the plug-in block is inserted into the slot on the connecting rod, thereby fixing the position of the connecting rod. The structure is simple and the operation is convenient.

[0020] Optionally, the conveying mechanism includes a connecting frame and a sliding frame, the connecting frame is detachably connected to the mounting frame, the sliding frame is slidably connected to the connecting frame, both the connecting frame and the sliding frame are provided with conveying rollers, and the sliding frame is provided with a driving motor for driving the conveying rollers to rotate.

[0021] By adopting the above technical solution, when transporting a steel truss bridge, the connecting frame is first connected to the erection frame, and then the steel truss bridge is placed on the conveying rollers on the connecting frame and the sliding frame to keep the steel truss bridge horizontal. The drive motor is started to drive the conveying rollers to rotate, so that the steel truss bridge can be transported with high transportation efficiency, and the sliding frame can slide and extend to maintain the stability of the steel truss bridge during transportation.

[0022] Optionally, the conveying rollers on the connecting frame are evenly arranged along the length direction of the connecting frame, the rotation axes of the multiple groups of conveying rollers are perpendicular to the length direction of the connecting frame, toothed belts are arranged between the multiple groups of conveying rollers, and a drive connection assembly is provided between the toothed belts and the drive motor.

[0023] By adopting the above technical solution, the toothed belt is arranged between multiple groups of conveyor rollers, connecting the multiple groups of conveyor rollers on the connecting frame into a whole. The driving motor drives the toothed belt to rotate by driving the connecting assembly, thereby driving the multiple groups of conveyor rollers on the connecting frame to rotate. The conveyor rollers on the connecting frame and the sliding frame convey the steel truss bridge at the same time, thereby improving the conveying effect of the steel truss bridge.

[0024] Optionally, the drive connection assembly includes gears and connecting belts, and the gears are provided in two groups. Both groups of gears are rotatably connected to the sliding frame and mesh with each other. The connecting belt is sleeved on the conveying roller and a group of gears on the sliding frame, and the other group of gears meshes with the toothed belt.

[0025] By adopting the above technical solution, the driving motor drives the conveying roller on the sliding frame to rotate, thereby driving the connecting belt and gear on the sliding frame to rotate, and the gear drives the toothed belt on the connecting frame to rotate, thereby realizing the rotation of the conveying roller on the connecting frame, and keeping the rotation directions of the conveying rollers on the sliding frame and the connecting frame the same, further improving the conveying effect of the steel truss bridge.

[0026] Optionally, a power assembly for driving the sliding frame to move is provided on the connecting frame.

[0027] By adopting the above technical solution, during the erection of the steel truss bridge, the power component drives the sliding frame to slide on the connecting frame, thereby extending the overall length of the connecting frame and the sliding frame to ensure that both ends of the steel truss bridge remain level during transportation, thereby improving the stability of transportation.

[0028] Optionally, the power assembly includes a threaded rod, a threaded sleeve and a rotating motor, the rotating motor is arranged on the connecting frame, the threaded rod is coaxially fixedly connected to the output shaft of the rotating motor, the axis of the output shaft is the same as the sliding direction of the sliding frame, the threaded sleeve is fixedly connected to the sliding frame, and the threaded sleeve is sleeved on the threaded rod and is threadedly connected to the threaded rod.

[0029] By adopting the above technical solution, the rotating motor drives the threaded rod to rotate, the threaded sleeve is threadedly connected to the threaded rod, and the threaded sleeve is fixedly connected to the sliding frame. After the threaded rod rotates, it can drive the threaded sleeve and the sliding frame to move along the axial direction of the threaded rod, which is easy to operate.

[0030] In summary, this application includes at least the following beneficial technical effects:

[0031] 1. The end positions of the steel truss bridge are positioned by the limit assemblies on both sides of the fixed frame, so that the position of the steel truss bridge after transportation is more accurate, thereby facilitating the docking and installation of two sets of steel truss bridges;

[0032] 2. When transporting a steel truss bridge, first connect the connecting frame to the erection frame, then place the steel truss bridge on the connecting frame and the conveying rollers on the sliding frame, keep the steel truss bridge level, start the drive motor to drive the conveying rollers to rotate, so that the steel truss bridge can be transported with high transportation efficiency, and the sliding frame can slide and extend to maintain the stability of the steel truss bridge during transportation;

[0033] 3. During the erection of the steel truss bridge, the power assembly drives the sliding frame to slide on the connecting frame, thereby extending the overall length of the connecting frame and the sliding frame to ensure that both ends of the steel truss bridge remain level during transportation, thereby improving transportation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the overall structure of the calibration mechanism and the conveying mechanism of an embodiment of the present application;

[0036] Figure 3 yes Figure 2 A magnified schematic diagram of the middle part A;

[0037] Figure 4 This is a schematic diagram of the overall structure of the power assembly of an embodiment of the present application;

[0038] Figure 5 It is a schematic diagram of the overall structure of the positioning component of an embodiment of the present application.

[0039] Figure numerals: 1. Steel truss bridge; 2. Erection piles; 3. Erection frame; 4. Calibration mechanism; 41. Fixing frame; 411. Slide; 42. Limiting assembly; 421. Connecting rod; 4211. Slot; 422. Positioning seat; 4221. Inclined surface; 423. Opening; 43. Positioning assembly; 431. Plug-in block; 432. Sliding rod; 5. Conveying mechanism; 51. Connecting frame; 52. Sliding frame; 53. Conveying roller; 54. Driving motor; 55. Toothed belt; 6. Drive connection assembly; 61. Gear; 62. Connecting belt; 7. Power assembly; 71. Threaded rod; 72. Threaded sleeve; 73. Rotating motor. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-5 This application is described in further detail.

[0041] An embodiment of the present application discloses a method for installing a river-spanning steel truss bridge.

[0042] A method for installing a river-spanning steel truss bridge comprises the following steps:

[0043] Step 1: Build piles 2 in the middle of the river channel, transport steel truss bridges 1 onto the piles 2 from both sides of the river channel, so that one end of the steel truss bridge 1 is placed on the piles 2 and the other end is placed on the river bank. A calibration mechanism 4 is set at the top of the piles 2 to accurately align the two sets of steel truss bridges 1;

[0044] Step 2: Build a scaffolding 3 on both sides of the river channel. A conveying mechanism 5 is detachably provided on the scaffolding 3. The steel truss bridge 1 is conveyed by the conveying mechanism 5 to ensure that the steel truss bridge 1 remains horizontal during the conveying process.

[0045] Step 3: Use a lifting machine to lift the steel truss bridge 1, place the steel truss bridge 1 on the conveying mechanism 5, and convey the steel truss bridge 1 to the erection piles 2 through the conveying mechanism 5;

[0046] Step 4: Use the calibration mechanism 4 to accurately connect the two sets of steel truss bridges 1 on the erection piles 2. After the installation of the steel truss bridges 1 is completed, the conveying mechanism 5 is disassembled and the steel truss bridges 1 are fixed.

[0047] Reference Figure 1-3 Before constructing the steel truss bridge 1, first construct the erection piles 2 in the middle of the river channel and construct the erection frames 3 on both sides of the river channel so that the erection piles 2 and the two erection frames 3 are located in the same straight line;

[0048] In order to facilitate the transportation of the steel truss bridge 1 from both sides of the river channel to one end and to be erected on the erection piles 2, the conveying mechanism 5 includes a connecting frame 51 and a sliding frame 52. The connecting frame 51 is detachably connected to the erection frame 3 by bolts, and the connecting frame 51 extends in the direction of the erection piles 2. The sliding frame 52 is slidably connected to the connecting frame 51. The connecting frame 51 and the sliding frame 52 are both rotatably connected with conveying rollers 53. The steel truss bridge 1 is hoisted and placed on the conveying rollers 53 on the connecting frame 51 and the sliding frame 52 by a hoisting device. A driving motor 54 is fixedly installed on the sliding frame 52. The conveying rollers 53 are coaxially fixedly connected to the output shaft of the driving motor 54. The driving motor 54 drives the conveying rollers 53 to rotate to transport the steel truss bridge 1.

[0049] There are multiple groups of conveying rollers 53 on the connecting frame 51. The multiple groups of conveying rollers 53 are evenly distributed along the length direction of the connecting frame 51, and the rotation axes of the conveying rollers 53 are perpendicular to the length direction of the connecting frame 51. A toothed belt 55 is sleeved between the multiple groups of conveying rollers 53. A drive connection assembly 6 is provided between the toothed belt 55 and the drive motor 54. The drive motor 54 drives the toothed belt 55 to rotate through the drive connection assembly 6, thereby driving the conveying rollers 53 on the connecting frame 51 to rotate, thereby improving the conveying effect of the steel truss bridge 1;

[0050] Specifically, the driving connection assembly 6 includes a gear 61 and a connecting belt 62, wherein two groups of gears 61 are provided, both groups of gears 61 are rotatably connected to the sliding frame 52 and the two groups of gears 61 are meshed with each other, the connecting belt 62 is sleeved on the conveying roller 53 on the sliding frame 52 and one group of gears 61, and the other group of gears 61 is meshed with the toothed belt 55, the driving motor 54 drives the conveying roller 53 on the sliding frame 52 to rotate, thereby driving the connecting belt 62 and the gear 61 on the sliding frame 52 to rotate, the gear 61 drives the toothed belt 55 on the connecting frame 51 to rotate, thereby realizing the rotation of the conveying roller 53 on the connecting frame 51, and keeping the conveying rollers 53 on the sliding frame 52 and the connecting frame 51 in the same rotation direction.

[0051] Reference Figure 4The cam 72 is connected to the cam 71 and the cam 72 is connected to the cam 71, and the cam 72 is connected to the cam 71. The cam 72 is connected to the cam 71 and the cam 72 is connected to the cam 71.

[0052] Reference Figure 2 、 3 and 5. In order to accurately dock the steel truss bridges 1 on both sides of the river, the calibration mechanism 4 includes a fixing frame 41 and limiting assemblies 42 arranged on both sides of the fixing frame 41. The fixing frame 41 is fixedly connected to the top of the erection pile 2 and the fixing frame 41 is arranged along an extending direction perpendicular to the connecting frame 51. A space for placing the steel truss bridge 1 is formed between the two limiting assemblies 42.

[0053] The cam 422 is fixed to the fixing frame 41 so that the fixing frame 41 is fixed with a slot 411 that is slidably adapted to the connecting rod 421. The fixing frame 41 is provided with a slot 411 that is fixedly connected to one end of the connecting rod 421. When the fixing frame 422 moves, the connecting rod 421 is located in the slot 411 to maintain the stability of the fixing frame 422 during the movement. The two ends of the fixing frame 422 are close to each other on one side and an inclined surface 4221 is provided. The inclined surface 4221 at the same end of the two fixing frames 422 forms an opening 423. The diameter of the opening 423 is larger than the distance between the two fixing frames 422. After the steel truss bridge 1 is transported, it is inserted between the two fixing frames 422 from the opening 423, so that it is placed on the fixing frame 41. Since the diameter of the opening 423 is larger than the distance between the two fixing frames 422, the steel truss bridge 1 can more accurately enter between the two fixing frames 422 during the transportation process.

[0054] The fixing frame 41 is provided with a positioning assembly 43 for fixing the connecting rod 421. The positioning assembly 43 includes a plug-in block 431 and a sliding rod 432. The sliding rod 432 is slidably connected to the fixing frame 41. The plug-in block 431 is fixedly connected to the sliding rod 432. A card slot 4211 is provided on the connecting rod 421. The plug-in block 431 is plugged and adapted to the card slot 4211. The sliding rod 432 slides on the fixing frame 41 to disengage the plug-in block 431 from the card slot 4211. When the connecting rod 421 slides, the plug-in block 431 is inserted into the card slot 4211 on the connecting rod 421, thereby fixing the position of the connecting rod 421, thereby achieving position fixation of the two positioning seats 422.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for installing a river-spanning steel truss bridge, characterized by: The steps include: Step 1: constructing piles (2) in the middle of the river channel, transporting steel truss bridges (1) from both sides of the river channel to the piles (2), so that one end of the steel truss bridge (1) is placed on the piles (2) and the other end is placed on the river bank, and a calibration mechanism (4) is set at the top of the piles (2) for accurately docking the two sets of steel truss bridges (1); Step 2: constructing a scaffolding frame (3) on both sides of the river channel, wherein a conveying mechanism (5) is detachably provided on the scaffolding frame (3), and the steel truss bridge (1) is conveyed by the conveying mechanism (5), ensuring that the steel truss bridge (1) remains horizontal during the conveying process; Step 3: hoisting the steel truss bridge (1) by a hoisting machine, placing the steel truss bridge (1) on the conveying mechanism (5), and conveying the steel truss bridge (1) to the erection pile (2) by the conveying mechanism (5); Step 4: The two sets of steel truss bridges (1) are accurately docked on the piles (2) through the calibration mechanism (4). After the steel truss bridges (1) are installed, the conveying mechanism (5) is disassembled and the steel truss bridges (1) are fixed; The calibration mechanism (4) includes a fixed frame (41) and a limiting assembly (42) arranged on both sides of the fixed frame (41), the fixed frame (41) is fixedly connected to the top of the erection pile (2), the fixed frame (41) is arranged along a conveying direction perpendicular to the conveying mechanism (5), and a space for placing the steel truss bridge (1) is formed between the two limiting assemblies (42); the limiting assembly (42) includes a connecting rod (421) and a positioning seat (422), the fixed frame (41) is provided with a sliding groove (411) that is slidably adapted to the connecting rod (421), the positioning seat (422) is arranged at one end of the connecting rod (421), and the fixed frame (41) is provided with a positioning assembly (43) for fixing the connecting rod (421); The positioning assembly (43) includes a plug-in block (431) and a sliding rod (432), wherein the sliding rod (432) is slidably arranged on the fixing frame (41), the plug-in block (431) is arranged on the sliding rod (432), and a card slot (4211) is provided on the connecting rod (421), and the plug-in block (431) is plugged and adapted to the card slot (4211); The conveying mechanism (5) comprises a connecting frame (51) and a sliding frame (52), wherein the connecting frame (51) is detachably connected to the mounting frame (3), and the sliding frame (52) is slidably connected to the connecting frame (51), and both the connecting frame (51) and the sliding frame (52) are provided with conveying rollers (53), and the sliding frame (52) is provided with a driving motor (54) for driving the conveying rollers (53) to rotate; The conveying rollers (53) on the connecting frame (51) are evenly arranged along the length direction of the connecting frame (51), the rotation axes of the multiple groups of conveying rollers (53) are perpendicular to the length direction of the connecting frame (51), a toothed belt (55) is sleeved between the multiple groups of conveying rollers (53), and a driving connection assembly (6) is provided between the toothed belt (55) and the driving motor (54); The driving connection assembly (6) includes gears (61) and connecting belts (62). The gears (61) are provided in two groups. The two groups of gears (61) are both rotatably connected to the sliding frame (52) and meshed with each other. The connecting belt (62) is sleeved on the conveying roller (53) on the sliding frame (52) and one group of gears (61). The other group of gears (61) meshes with the toothed belt (55).

2. The method for installing a river-crossing steel truss bridge according to claim 1, characterized in that: Both ends of the positioning seat (422) are provided with inclined surfaces (4221) on the sides close to each other, and the inclined surfaces (4221) at the same end of the two positioning seats (422) form an opening (423), and the diameter of the opening (423) is larger than the distance between the two positioning seats (422).

3. The method for installing a river-crossing steel truss bridge according to claim 1, characterized in that: The connecting frame (51) is provided with a power assembly (7) for driving the sliding frame (52) to move.

4. The method for installing a river-crossing steel truss bridge according to claim 3, characterized in that: The power assembly (7) comprises a threaded rod (71), a threaded sleeve (72) and a rotary motor (73); the rotary motor (73) is arranged on the connecting frame (51); the threaded rod (71) is coaxially fixedly connected to the output shaft of the rotary motor (73); the axis of the output shaft is in the same sliding direction as the sliding frame (52); the threaded sleeve (72) is fixedly connected to the sliding frame (52); the threaded sleeve (72) is sleeved on the threaded rod (71) and threadedly connected to the threaded rod (71).

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