Bridge fixing structure for steel structure truss arch bridge

Abstract

The invention relates to the technical field of bridge engineering, and discloses a bridge fixing structure for a steel structure truss arch bridge, which comprises a bridge floor, a truss bridge, a truss tail beam and a fixing ring, a mounting part is mounted below the bridge floor and is used for mounting a butt joint tool and a compensation tool, and a butt joint part is mounted on the mounting part and is used for mounting the butt joint tool and the compensation tool. The compensation part is mounted on the mounting part, an automatic emergency compensation mechanism is adopted, the inclination offset of the bridge can be compensated automatically and emergently, the pressure sensors on the two sides of the top of the lower bearing plate monitor pressure in real time, and once the bridge inclines and deviates due to various loads, the compensation part can automatically and emergently compensate the inclination offset of the bridge. The pressure sensor rapidly captures pressure changes, when the pressure difference value exceeds a set threshold value, a compensation program is triggered immediately, a signal is sent to the hydraulic rod, the hydraulic rod acts to push the compensation column, the compensation column drives the adjusting arm to rotate, meanwhile, the steel cable is pulled to generate tension, the offset of the truss bridge is corrected, and the bridge structure is rapidly recovered to be stable.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and particularly to a bridge fixing structure for a steel truss arch bridge. Background Art

[0002] Steel truss arch bridges have been widely used in bridge construction due to their unique advantages. They have the characteristics of saving material consumption, large span, and beautiful shape. Since the main load-bearing members have a small cross-section and mainly bear compression, they can give full play to the mechanical properties of steel. Therefore, they have obvious technical and economic advantages when crossing complex terrains such as large rivers and valleys. At the same time, their beautiful appearance also makes them one of the common forms of urban landscape bridges, which can blend with the surrounding environment and enhance the overall image of the city.

[0003] In the structural system of a steel truss arch bridge, the bridge fixing structure plays a crucial role. It is mainly used to achieve a reliable connection between the bridge structure and the foundation, transfer the load of the upper bridge structure to the foundation, and at the same time limit the displacement and deformation of the bridge structure under various loads to ensure the stability and safety of the bridge structure. For example, as an important part of the bridge fixing structure, the bearing not only has to bear the vertical load of the bridge but also has to adapt to the horizontal displacement and angular deformation of the bridge caused by factors such as temperature change, concrete shrinkage and creep, and vehicle load.

[0004] Generally, the existing bridge bearings and truss bridges are tightly connected at the connection parts of the bearings and truss bridges through high-strength bolts. This method has the advantages of reliable connection, convenient installation and disassembly, and can better adapt to various deformations and displacements of the bridge during use. At the same time, the bolt connection can ensure the tightness and stability of the connection by controlling the pre-tightening force of the bolts.

[0005] However, during the use of the bridge, it continuously bears dynamic loads such as vehicle loads and wind loads, resulting in the structure vibrating. Over time, this vibration will continuously weaken the pre-tightening force of the bolt connection, and ultimately cause the bolts to loosen. Once the bolt loosening occurs, the bridge will immediately be in a risk state. Currently, the bridge lacks automatic pre-treatment safety emergency measures, and during the period before the maintenance personnel arrive, the bridge safety is difficult to guarantee, there are potential safety hazards, and serious accidents may be triggered. Therefore, a bridge fixing structure for a steel truss arch bridge is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a bridge fixing structure for a steel truss arch bridge, which solves the problems that the bridge lacks automatic pre-treatment safety emergency measures, and during the period before the maintenance personnel arrive, the bridge safety is difficult to guarantee and there are potential safety hazards.

[0007] (2) Technical solution To achieve the above object, the present invention provides the following technical solution: A bridge fixing structure for a steel structure truss arch bridge, including a bridge deck, a truss bridge, a truss tail beam and a fixing ring. The installation part is installed below the bridge deck and is used for installing docking tools and compensation tools. The docking part is installed on the installation part and is used for adaptively adjusting the balance between the truss bridge and the truss tail beam. The compensation part is installed on the installation part and is used for automatically compensating the tilt offset of the bridge emergently. The support part is installed at the bottom of the installation part and is used for positioning and supporting the truss bridge.

[0008] Preferably, a truss bridge is installed on the bridge deck, and truss tail beams are fixedly connected to both ends of the truss bridge. Fixing rings are fixedly connected to the two truss tail beams.

[0009] Preferably, the installation part includes a pier body. Two inclined plane structures are symmetrically arranged at the top of the pier body. Two docking grooves are formed on one inclined plane of the pier body. Two adjustment channels are formed on one side of the pier body. The two adjustment channels are communicated with the two docking grooves. A groove is formed on the other inclined plane of the pier body. Two positioning rings are installed on the top of the pier body. Four protective plates are installed on the inclined plane at the top of the pier body. The four protective plates are symmetrically arranged on both sides of the groove. Hydraulic rods are hinged between the two protective plates on the same side.

[0010] Preferably, one side of the inner wall of each of the two docking grooves is an arc surface structure. The other two ends of the truss bridge are respectively inserted into the two docking grooves. The arc surface at the end of the truss bridge fits with the arc surface of the docking groove.

[0011] Preferably, the docking part includes a compensation arm. The compensation arm is inserted into the docking groove and abuts against the adjacent end of the truss bridge. A connecting ring is fixedly connected to the bottom end of the compensation arm. A limiting plate is fixedly connected to the top of the compensation arm, and the limiting plate is of a U-shaped structure. The end of the compensation arm fits between the two ear ends of the limiting plate. A steel cable is fixedly connected to the connecting ring. The movable end of the steel cable extends out of the adjustment channel and is wound around the fixing ring on the same plane. The winding end of the steel cable continues to extend and is fixed on the positioning ring on the same plane.

[0012] Preferably, the number of the docking parts is two. The other docking part is arranged in the other docking groove. The two docking parts are symmetrically arranged with each other.

[0013] Preferably, the compensation part includes two triangular plates which are respectively fixedly connected to both sides of the inner wall of the groove. An adjusting arm is hinged between the two triangular plates. The end of the adjusting arm is fixedly connected with a compensation column. Four hinge blocks are fixedly connected to the outer wall of the compensation column. Four guiding disks are fixedly sleeved on the outer wall of the compensation column. A bottom sealing plate is fixedly connected between two guiding disks on the same side.

[0014] Preferably, the supporting part includes two bearing plates. A reinforcing plate is fixedly connected to the top of the upper bearing plate. A spherical crown is fixedly connected between the two bearing plates. A bolt is connected between the two bearing plates. The pier body is fixedly connected to the top of the upper bearing plate through the reinforcing plate.

[0015] Preferably, the two triangular plates are fixedly connected to the top of the upper bearing plate. The inner rod ends of each hydraulic rod are respectively hinged between two hinge blocks on the same side. The two steel cables in the two docking parts both bypass the outer wall of the compensation column. Each steel cable respectively passes through between two guiding disks and the bottom sealing plate on the same side.

[0016] Preferably, detection platforms are installed on both sides of the top of the lower bearing plate. Detection devices are installed on the two detection platforms and are in contact with the bottom of the upper bearing plate through the detection devices. The two detection devices are both pressure sensors. The two detection devices are both electrically connected to the two hydraulic rods.

[0017] (III) Beneficial effects Compared with the prior art, the present invention provides a bridge fixing structure for a steel truss arch bridge, having the following beneficial effects: 1. The bridge fixing structure for the steel truss arch bridge adopts an automatic emergency compensation mechanism, which can automatically compensate the bridge tilt offset. The pressure sensors on both sides of the top of the lower bearing plate monitor the pressure in real time. Once the bridge tilts and offsets due to various loads, the pressure sensors quickly capture the pressure change. When the pressure difference exceeds the set threshold, the compensation program is immediately triggered to send a signal to the hydraulic rod. The hydraulic rod acts to push the compensation column, and the compensation column drives the adjusting arm to rotate, while pulling the steel cable to generate tension, thereby correcting the offset of the truss bridge and quickly restoring the stability of the bridge structure.

[0018] 2. The bridge fixing structure for the steel truss arch bridge adopts an adaptive balance adjustment mechanism, which can adaptively adjust the balance between the truss bridge and the truss tail beam. The compensation arm of the docking part abuts against the tail end of the truss bridge. The steel cable is wound around the fixed ring and the positioning ring. When the compensation column moves, the tension of the steel cable changes, pulling the compensation arm to abut tightly against the tail end of the truss bridge, realizing the angle correction of the truss bridge, and automatically adjusting the balance according to the tilt and offset of the bridge, improving the overall stability of the bridge.

[0019] 3. The bridge fixing structure for the steel structure truss arch bridge uses the support part to provide stable positioning support for the truss bridge. The two bearing plates are connected by a spherical crown and bolts. The reinforcement plate on the top of the upper bearing plate is fixed to the pier body of the installation part. This structure effectively disperses and transmits the bridge load, enhances the overall structural stability, and assists the docking part and the compensation part to better maintain the bridge stability.

[0020] 4. The bridge fixing structure for the steel structure truss arch bridge is such that each hydraulic rod is equipped with an independent oil pump and accumulator. When the main circuit fails, the standby circuit can maintain 70% compensation capacity for at least two hours, buying time for emergency response and improving the safety of the bridge under sudden situations.

[0021] 5. The bridge fixing structure for the steel structure truss arch bridge integrates a displacement sensor inside the compensation column to monitor the displacement in real time and compare it with the theoretical value. When the deviation exceeds a certain range, the output power of the hydraulic rod is automatically adjusted to achieve precise control. At the same time, the compensation arm adopts a composite material sandwich structure, and polyurethane buffer blocks are set at both ends to prevent the steel cable from being overloaded and broken, further enhancing the reliability and durability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is the overall structure diagram of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention; Figure 2 FIG. is the bottom side axonometric view of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention; Figure 3 FIG. is a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention Figure 2 The enlarged view of A in; Figure 4 FIG. is a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention Figure 2 The enlarged view of B in; Figure 5 FIG. is the connection diagram of the installation part, the support part and the compensation part of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention; Figure 6 FIG. is the structure diagram of the installation part of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention; Figure 7 FIG. is the cross-sectional view of the pier body of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention; Figure 8 FIG. is the schematic diagram of the structure of the support part and the compensation part of a bridge fixing structure for a steel structure truss arch bridge proposed by the present invention.

[0023] In the figure: 1, bridge deck; 2, truss bridge; 3, truss tail beam; 4, fixing ring; 5, installation part; 51, pier body; 52, docking groove; 53, adjustment channel; 54, groove; 55, positioning ring; 56, protective plate; 57, hydraulic rod; 6, docking part; 61, compensation arm; 62, connecting ring; 63, limiting plate; 64, steel cable; 7, compensation part; 71, triangular plate; 72, adjustment arm; 73, compensation column; 74, hinge block; 75, guide disk; 76, bottom sealing plate; 8, support part; 81, bearing plate; 82, reinforcement plate; 83, spherical crown; 9, inspection platform; 10, inspection equipment. Detailed implementation manner

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-8 , the present invention provides a technical solution: a bridge fixing structure for a steel structure truss arch bridge, including a bridge deck 1, a truss bridge 2, a truss tail beam 3, and a fixing ring 4. In this case, the installation part 5 is installed below the bridge deck 1 and is used to install docking tools and compensation tools. In this case, the docking part 6 is installed on the installation part 5 and is used to adaptively adjust the balance between the truss bridge 2 and the truss tail beam 3. In this case, the compensation part 7 is installed on the installation part 5 and is used to automatically and emergently compensate for the inclination and offset of the bridge. In this case, the support part 8 is installed at the bottom of the installation part 5 and is used to position and support the truss bridge 2.

[0026] In this embodiment, a truss bridge 2 is installed on the bridge deck 1 of this case. Truss tail beams 3 are fixedly connected to both ends of the truss bridge 2, and a fixing ring 4 is fixedly connected to the two truss tail beams 3.

[0027] The installation part 5 of this case includes a pier body 51. Two inclined plane structures are symmetrically arranged at the top of the pier body 51. Two docking grooves 52 are formed in one inclined plane of the pier body 51. Two adjusting channels 53 are formed in one side of the pier body 51. The two adjusting channels 53 are communicated with the two docking grooves 52. A groove 54 is formed in the other inclined plane of the pier body 51. Two positioning rings 55 are installed at the top of the pier body 51. Four protection plates 56 are installed on the top inclined plane of the pier body 51. The four protection plates 56 are symmetrically arranged on both sides of the groove 54. A hydraulic rod 57 is hinged between the two protection plates 56 on the same side. Each hydraulic rod 57 is equipped with an independent oil pump and an accumulator. When the main circuit fails, the standby circuit can maintain 70% compensation capacity for at least two hours to gain time for emergency response. The inner walls of the two docking grooves 52 on the sides away from the two compensation arms 61 are both arc-shaped structures. The other two ends of the truss bridge 2 are arc-shaped structures and are respectively inserted into the two docking grooves 52. The inner arc surfaces of the two arc-shaped ends of the truss bridge 2 are respectively in contact with the arc surfaces of the corresponding docking grooves 52. The outer arc surfaces of the two arc-shaped ends of the truss bridge 2 are respectively abutted against the adjacent compensation arms 61.

[0028] It should be noted that the docking part 6 of this case includes a compensation arm 61, which adopts a composite material sandwich structure. Polyurethane buffer blocks are arranged at both ends of the compensation arm 61. When the displacement exceeds the design maximum value (usually ±50mm), its movement range is limited to prevent the steel cable 64 from being overloaded and broken. The compensation arm 61 is inserted into the docking groove 52 and abuts against the end of the adjacent truss bridge 2. A connecting ring 62 is fixedly connected to the bottom end of the compensation arm 61. A limiting plate 63 is fixedly connected to the top of the compensation arm 61 and the limiting plate 63 is of a U-shaped structure. The end of the compensation arm 61 is fitted between the two ears of the limiting plate 63. A steel cable 64 is fixedly connected to the connecting ring 62. The movable end of the steel cable 64 extends out of the adjusting channel 53 and is wound around the fixed ring 4 on the same plane. The winding end of the steel cable 64 continues to extend and is fixed on the positioning ring 55 on the same plane. The number of the docking parts 6 is two. The other docking part 6 is arranged in the other docking groove 52. The two docking parts 6 are symmetrically arranged with each other.

[0029] The compensation part 7 of this case includes two triangular plates 71. The two triangular plates 71 are respectively fixedly connected to both sides of the inner wall of the groove 54. An adjusting arm 72 is hinged between the two triangular plates 71. The end of the adjusting arm 72 is fixedly connected to a compensation column 73. A wire-pulling type displacement sensor is integrated inside the compensation column 73. An MPS-M explosion-proof wire-pulling type displacement sensor is adopted. Four hinge blocks 74 are fixedly connected to the outer wall of the compensation column 73. Four guide discs 75 are fixedly sleeved on the outer wall of the compensation column 73. A bottom sealing plate 76 is fixedly connected between the two guide discs 75 on the same side.

[0030] It should be noted that the support part 8 of this case includes two bearing plates 81. A reinforcement plate 82 is fixedly connected to the top of the upper bearing plate 81. A spherical crown 83 is fixedly connected between the two bearing plates 81. Bolts are connected between the two bearing plates 81. The pier body 51 is fixedly connected to the top of the upper bearing plate 81 through the reinforcement plate 82. The two triangular plates 71 are fixedly connected to the top of the upper bearing plate 81. The inner rod ends of each hydraulic rod 57 are respectively hinged between two hinge blocks 74 on the same side. The piston rod of the hydraulic rod 57 precisely expands and contracts in a PWM pulse width modulation manner, pushing the compensation column 73 to move in a curved motion. The displacement direction of the compensation column 73 is opposite to the inclination direction. For example, if the bridge tilts to the left, the compensation column moves to the right. The two steel cables 64 in the two docking parts 6 both bypass the outer wall of the compensation column 73, and each steel cable 64 respectively passes through between two guide discs 75 and a bottom sealing plate 76 on the same side.

[0031] In this case, detection platforms 9 are installed on both sides of the top of the lower bearing plate 81. Detection devices 10 are installed on the two detection platforms 9 and are in contact with the bottom of the upper bearing plate 81 through the detection devices 10. The two detection devices 10 are both pressure sensors, and ZC2101L model IEPE piezoelectric pressure sensors are used. The two detection devices 10 are both electrically connected to the two hydraulic rods 57.

[0032] Working principle: The pressure sensors installed on the detection platforms 9 on both sides of the top of the lower bearing plate 81 continuously monitor the pressure data transmitted by the upper bearing plate 81. Once the bridge vibrates, tilts or shifts due to dynamic loads such as vehicle loads and wind loads, the pressure distribution received by the upper bearing plate 81 will change. The pressure sensors can quickly capture these changes. When the pressure difference ΔP detected by the two pressure sensors exceeds the threshold (such as set to 5% of the design load), the compensation program is triggered. The sensors transmit the ΔP signal to the controller of the hydraulic rod 57, and the required compensation displacement δ is calculated through the built-in algorithm (formula: δ = K・ΔP・L² / (EA), where K is the structural stiffness coefficient, L is the span, and EA is the tensile stiffness of the steel cable).

[0033] When the pressure sensors detect abnormal pressure, that is, it is judged that the bridge has tilted and shifted, a signal will be immediately sent to the hydraulic rod 57 electrically connected to it. After receiving the signal, the hydraulic rod 57 starts to act according to the preset program. The hydraulic rod 57 expands and contracts to push the compensation column 73, driving the adjusting arm 72 to rotate around the hinge point of the triangular plate 71, and synchronously pulling the steel cable 64 and providing tension through the guide disc 75 and the bottom sealing plate 76 to correct the offset of the truss bridge 2.

[0034] The compensating arm 61 of the docking part 6 abuts against the end of the truss bridge 2, and the steel cable 64 on the bottom connecting ring 62 thereof is wound around the fixing ring 4 and the positioning ring 55. When the compensating column 73 moves in a curved manner to one side, the steel cable 64 is tensioned, and the compensating arm 61 is pulled to further tightly abut against the end of the truss bridge 2 inserted into the docking groove 52. At the same time, the angle correction of the truss bridge 2 is realized through the tension received by the fixing ring 4, and automatic emergency treatment is carried out. According to the inclination and offset of the bridge, the balance degree between the truss bridge 2 and the truss tail beam 3 is adaptively adjusted to make the bridge structure regain stability.

[0035] Four guiding discs 75 on the compensating column 73 and the bottom sealing plate 76 form a steel cable guiding system to ensure that the steel cable 64 maintains a stable wrap angle (usually designed to be 120°-150°) during the displacement of the compensating column, maximizing the tension conversion efficiency. When the compensating column 73 moves a distance of δ, the effective length change amount ΔL of the steel cable 64 = 2δ・sinθ (θ is the included angle between the steel cable and the axis of the compensating column, usually taken as 30°-45°), and an additional tension ΔT = EA・ΔL / L is generated according to Hooke's law. 0 (L 0 is the original length of the steel cable).

[0036] By adjusting the elastic modulus of the compensating arm 61, making its stiffness form a proportional relationship of 1:3 - 1:5 with the stiffness of the end of the truss bridge 2, ensuring that the compensating force is transmitted in a flexible manner and avoiding excessive secondary internal forces. A wire-pulling displacement sensor is integrated inside the compensating column 73 to monitor the displacement amount δ in real time and compare it with the theoretical calculated value. When the deviation exceeds ±2 mm, the controller automatically adjusts the output power of the hydraulic rod.

[0037] Through this differential compensation mechanism that converts the displacement of the compensating column 73 into the tension of the steel cable 64, this fixed structure realizes the active, precise, and rapid control of the bridge inclination, breaks through the limitations of the traditional passive connection method, and significantly improves the safety and durability of the bridge under complex loads.

[0038] The two bearing plates 81 of the supporting part 8 are connected by a spherical crown 83 and bolts, and the reinforcing plate 82 on the top of the upper bearing plate 81 is fixed to the pier body 51 of the installation part 5. This structure provides stable positioning support for the truss bridge 2, disperses and transmits the bridge load, enhances the overall structural stability, and assists the docking part 6 and the compensating part 7 to maintain the bridge stability.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A bridge fixing structure for a steel structure truss arch bridge, characterized in that: include: Bridge deck (1); Truss bridge (2) and truss tail beam (3); A fixing ring (4); A mounting portion (5) mounted below the bridge deck (1) and used for mounting a docking tool and a compensation tool; A docking portion (6) mounted on the mounting portion (5) and used for adaptively adjusting the balance between the truss bridge (2) and the truss tail beam (3); A compensation part (7) is mounted on the mounting part (5) and is used for automatically and urgently compensating for the tilt offset of the bridge; A support portion (8) is installed at the bottom of the installation portion (5) and is used to position and support the truss bridge (2).

2. The bridge fixing structure for a steel structure truss arch bridge according to claim 1, characterized in that: A truss bridge (2) is installed on the bridge deck (1), and truss tail beams (3) are fixedly connected to both tail ends of the truss bridge (2), and fixing rings (4) are fixedly connected to the two truss tail beams (3).

3. The bridge fixing structure for a steel structure truss arch bridge according to claim 2 is characterized in that: The mounting portion (5) comprises a pier body (51), the top of the pier body (51) being symmetrically provided with two inclined surface structures, one side inclined surface of the pier body (51) being provided with two docking grooves (52), one side inclined surface of the pier body (51) being provided with two adjustment channels (53), the two adjustment channels (53) being connected to the two docking grooves (52), the other side inclined surface of the pier body (51) being provided with a groove (54), the top of the pier body (51) being provided with two positioning rings (55), the top inclined surface of the pier body (51) being provided with four protective plates (56), the four protective plates (56) being symmetrically provided on both sides of the groove (54), and a hydraulic rod (57) being hinged between two protective plates (56) on the same side.

4. The bridge fixing structure for a steel structure truss arch bridge according to claim 3 is characterized in that: One side of the inner wall of the two docking grooves (52) is a curved surface structure, and the other two tail ends of the truss bridge (2) are respectively inserted into the two docking grooves (52), and the curved surface of the tail end of the truss bridge (2) fits with the curved surface of the docking groove (52).

5. The bridge fixing structure for a steel structure truss arch bridge according to claim 4 is characterized in that: The docking portion (6) comprises a compensation arm (61), the compensation arm (61) being inserted into the docking groove (52) and abutting against the rear end of the adjacent truss bridge (2), the bottom end of the compensation arm (61) being fixedly connected to a connecting ring (62), the top of the compensation arm (61) being fixedly connected to a limiting plate (63), and the limiting plate (63) being a U-shaped structure, the rear end of the compensation arm (61) being fitted between two ear ends of the limiting plate (63), the connecting ring (62) being fixedly connected to a steel cable (64), the movable end of the steel cable (64) extending out of the adjustment channel (53) and being wound around a fixed ring (4) on the same plane, and the wound end of the steel cable (64) continuing to extend and being fixed to a positioning ring (55) on the same plane.

6. The bridge fixing structure for a steel structure truss arch bridge according to claim 5, characterized in that: There are two docking portions (6), another docking portion (6) is arranged in another docking groove (52), and the two docking portions (6) are arranged symmetrically to each other.

7. The bridge fixing structure for a steel structure truss arch bridge according to claim 6, characterized in that: The compensation part (7) comprises two triangular plates (71), the two triangular plates (71) are respectively fixedly connected to the two sides of the inner wall of the groove (54), an adjustment arm (72) is hinged between the two triangular plates (71), the end of the adjustment arm (72) is fixedly connected to a compensation column (73), the outer wall of the compensation column (73) is fixedly connected to four hinge blocks (74), the outer wall of the compensation column (73) is fixedly sleeved with four guide plates (75), and a bottom sealing plate (76) is fixedly connected between the two guide plates (75) on the same side.

8. The bridge fixing structure for a steel structure truss arch bridge according to claim 7, characterized in that: The support portion (8) comprises two pressure-bearing plates (81); a reinforcing plate (82) is fixedly connected to the top of the pressure-bearing plate (81) located at the top; a spherical crown (83) is fixedly connected between the two pressure-bearing plates (81); bolts are connected between the two pressure-bearing plates (81); and the pier body (51) is fixedly connected to the top of the pressure-bearing plate (81) located at the top via the reinforcing plate (82).

9. The bridge fixing structure for a steel structure truss arch bridge according to claim 8, characterized in that: The two triangular plates (71) are fixedly connected to the top of the pressure plate (81) located above, the inner rod end of each hydraulic rod (57) is hinged between two hinge blocks (74) on the same side, the two steel cables (64) in the two docking parts (6) both bypass the outer wall of the compensation column (73), and each of the steel cables (64) passes through between two guide plates (75) and the bottom sealing plate (76) on the same side.

10. The bridge fixing structure for a steel structure truss arch bridge according to claim 9, characterized in that: Detection platforms (9) are installed on both sides of the top of the pressure plate (81) located below. Detection devices (10) are installed on the two detection platforms (9) and are arranged in contact with the bottom of the pressure plate (81) located above through the detection devices (10). The two detection devices (10) are pressure sensors and are electrically connected to the two hydraulic rods (57).

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