Bridge fixing structure for steel structure truss arch bridge

Abstract

The application 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 deck, a truss bridge, a truss tail beam and a fixing ring, a mounting part is arranged below the bridge deck and is used for mounting butt joint tools and compensation tools, a butt joint part is arranged on the mounting part and is used for adaptively adjusting the balance degree of the truss bridge and the truss tail beam, a compensation part is arranged on the mounting part, an automatic emergency compensation mechanism is adopted, the bridge inclination offset can be automatically compensated, pressure sensors on the top of both sides of an underlying pressure bearing plate can monitor the pressure in real time, once the bridge inclines and deviates due to various loads, the pressure sensors can rapidly capture the pressure change, when the pressure difference exceeds a set threshold value, the compensation program is triggered immediately, a signal is sent to a hydraulic rod, the hydraulic rod acts to push a compensation column, the compensation column drives a regulating arm to rotate, simultaneously, the steel cable is pulled to generate tension, and then the offset of the truss bridge is corrected, so that the bridge structure can be quickly restored to stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge engineering, in particular to a bridge fixing structure for steel truss arch bridge. BACKGROUND

[0002] Steel truss arch bridge has been widely used in bridge construction due to its unique advantages. It has the characteristics of material saving, large span, and beautiful shape. Because the main load-bearing component has a small cross-section and mainly bears pressure, it can fully utilize the mechanical properties of steel, so it has obvious technical and economic advantages when crossing large rivers, valleys and other complex terrains. At the same time, its beautiful appearance also makes it one of the common forms of urban landscape bridges, which can blend in with the surrounding environment and enhance the overall image of the city.

[0003] In the structural system of steel truss arch bridge, the bridge fixing structure plays a crucial role. It is mainly used to realize the reliable connection between the bridge structure and the foundation, transfer the load of the bridge superstructure to the foundation, and limit the displacement and deformation of the bridge structure under various loads to ensure the stability and safety of the bridge structure. For example, the support, as an important part of the bridge fixing structure, not only bears the vertical load of the bridge, but also adapts to the horizontal displacement and angular deformation of the bridge due to temperature changes, concrete shrinkage and creep, vehicle loads and other factors.

[0004] The existing bridge support and truss bridge are generally connected by high-strength bolts at the connection part of the support and the truss bridge. 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 bolt.

[0005] However, during the use of the bridge, it continuously bears dynamic loads such as vehicle load and wind load, causing the structure to vibrate. Over time, this vibration will continuously weaken the pre-tightening force of the bolt connection, eventually causing the bolt to loosen. Once the bolt loosening phenomenon occurs, the bridge is immediately at risk. At present, the bridge lacks automatic pre-treatment safety emergency measures, and the bridge safety cannot be guaranteed during the time before the maintenance personnel arrive, which poses a safety hazard and may cause serious accidents. Therefore, a bridge fixing structure for steel truss arch bridge is proposed to solve the above-mentioned problems. SUMMARY

[0006] (I) Technical problems solved

[0007] In view of the deficiencies of the prior art, the bridge fixing structure for steel structure truss arch bridge is provided, which solves the problem of lack of automatic pretreatment safety emergency measures, and the bridge safety is difficult to guarantee and there are potential safety hazards during the time before the maintenance personnel arrive.

[0008] (II) Technical solutions

[0009] To achieve the above object, the present application provides the following technical scheme: a bridge fixing structure for steel structure truss arch bridge, comprising a bridge deck, a truss bridge and a truss tail beam and a fixing ring, an installation part is installed below the bridge deck, used for installing a butt joint part and a compensation part, the butt joint part is installed on the installation part, used for self-adapting adjustment of the balance degree of the truss bridge and the truss tail beam, the compensation part is installed on the installation part, used for automatic emergency compensation of the bridge inclination offset, a support part is installed at the bottom of the installation part, used for positioning and supporting the truss bridge.

[0010] Preferably, the bridge deck is provided with a truss bridge, two truss tail beams are fixedly connected to the two tail ends of the truss bridge, and a fixing ring is fixedly connected to the two truss tail beams.

[0011] Preferably, the installation part comprises a pier body, two inclined surfaces are symmetrically arranged on the top of the pier body, two butt joint grooves are formed in one side of the inclined surface of the pier body, two adjusting channels are formed in one side of the pier body, the two adjusting channels are in communication with the two butt joint grooves, a groove is formed in the other side of the inclined surface of the pier body, two positioning rings are installed on the top of the pier body, four protective plates are installed on the top of the inclined surface of the pier body, the four protective plates are symmetrically arranged on both sides of the groove, and a hydraulic rod is hingedly connected between the two protective plates on the same side.

[0012] Preferably, one side of the inner wall of the two butt joint grooves is an arc surface structure, the other two tail ends of the truss bridge are respectively inserted into the two butt joint grooves, and the arc surface of the tail end of the truss bridge is attached to the arc surface of the butt joint groove.

[0013] Preferably, the butt joint part comprises a compensation arm, the compensation arm is inserted into the butt joint groove and abuts against the tail end of the truss bridge adjacent to the compensation arm, 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 a U-shaped structure, the tail end of the compensation arm is attached 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 adjusting channel and is wound on the fixing ring on the same plane, and the wound end of the steel cable continues to extend and is fixed on the positioning ring on the same plane.

[0014] Preferably, the number of the butt joint parts is two, the other butt joint part is arranged in the other butt joint groove, and the two butt joint parts are symmetrically arranged with respect to each other.

[0015] Preferably, the compensation part comprises two triangular plates, the two triangular plates are fixedly connected to the two sides of the inner wall of the groove respectively, an adjusting arm is hinged between the two triangular plates, an 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 guide discs are fixedly sleeved on the outer wall of the compensation column, and a bottom sealing plate is fixedly connected between the two guide discs on the same side.

[0016] Preferably, the support part comprises two pressure bearing plates, the top of the upper pressure bearing plate is fixedly connected with a reinforcing plate, a spherical cap is fixedly connected between the two pressure bearing plates, and a bolt is connected between the two pressure bearing plates; the pier body is fixedly connected to the top of the upper pressure bearing plate through the reinforcing plate.

[0017] Preferably, the two triangular plates are fixedly connected to the top of the upper pressure bearing plate, the inner rod end of each hydraulic rod is hingedly connected between the two hinge blocks on the same side, the two steel cables in the two butt joints pass around the outer wall of the compensation column, and each steel cable passes through between the two guide discs and the bottom sealing plate on the same side.

[0018] Preferably, the top of the lower pressure bearing plate is provided with a detection table on each side, a detection device is installed on each detection table and is in contact with the bottom of the upper pressure bearing plate through the detection device, the two detection devices are pressure sensors, and the two detection devices are electrically connected with the two hydraulic rods.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the present application provides a bridge fixing structure for a steel truss arch bridge, which has the following beneficial effects:

[0021] 1. The bridge fixing structure for the steel truss arch bridge adopts an automatic emergency compensation mechanism, can automatically compensate for the inclination and deviation of the bridge, the pressure sensors on the two sides of the top of the lower pressure bearing plate monitor the pressure in real time, once the bridge inclines and deviates due to various loads, the pressure sensors quickly capture the pressure change, when the pressure difference exceeds the set threshold value, the compensation program is triggered immediately, a signal is sent to the hydraulic rod, the hydraulic rod acts to drive the compensation column, the compensation column drives the adjusting arm to rotate, simultaneously pulls the steel cable to generate tension, and then corrects the deviation of the truss bridge, so that the bridge structure quickly recovers to be stable.

[0022] 2. The bridge fixing structure for steel structure truss arch bridge adopts a self-adaptive balance adjusting mechanism, can self-adaptively adjust the balance degree of the truss bridge and the truss tail beam, the compensation arm of the butt joint part abuts against the tail end of the truss bridge, the steel cable is wound on the fixing ring and the positioning ring, when the compensation column moves, the tension of the steel cable changes, the compensation arm is pulled to abut against the tail end of the truss bridge, the angle correction of the truss bridge is realized, the balance is automatically adjusted according to the inclination and deviation of the bridge, and the overall stability of the bridge is improved.

[0023] 3. The bridge fixing structure for steel structure truss arch bridge adopts the support part to provide stable positioning support for the truss bridge, the two pressure bearing plates are connected through a spherical cap and bolts, the reinforcing plate at the top of the upper pressure bearing plate is fixed with the pier body of the mounting part, the structure effectively disperses and transmits the bridge load, enhances the overall structural stability, and better maintains the stability of the bridge with the butt joint part and the compensation part.

[0024] 4. The bridge fixing structure for steel structure truss arch bridge is equipped with an independent oil pump and an accumulator for each hydraulic rod, when the main circuit fails, the standby circuit can maintain 70% compensation capacity for at least two hours, so that time is gained for emergency response, and the safety of the bridge under sudden conditions is improved.

[0025] 5. The bridge fixing structure for steel structure truss arch bridge integrates a displacement sensor inside the compensation column, monitors the displacement in real time, compares with the theoretical value, automatically adjusts the output power of the hydraulic rod when the deviation exceeds a certain range, realizes accurate control, at the same time, the compensation arm adopts a composite sandwich structure, polyurethane buffer blocks are arranged at both ends, overloading of the steel cable is prevented, and the reliability and durability of the structure are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The overall structure diagram of the bridge fixing structure for steel structure truss arch bridge is provided.

[0027] Figure 2 The bottom side shaft view of the bridge fixing structure for steel structure truss arch bridge is provided.

[0028] Figure 3 The bridge fixing structure for steel structure truss arch bridge is provided. Figure 2 The enlarged view of A in the bridge fixing structure for steel structure truss arch bridge is provided.

[0029] Figure 4 The enlarged view of B in the bridge fixing structure for steel structure truss arch bridge is provided. Figure 2 The enlarged view of B in the bridge fixing structure for steel structure truss arch bridge is provided.

[0030] Figure 5 The connection diagram of the mounting part, the support part and the compensation part of the bridge fixing structure for steel structure truss arch bridge is provided.

[0031] Figure 6A steel structure truss arch bridge bridge fixing structure installation part structure diagram is provided for the present application.

[0032] Figure 7 A steel structure truss arch bridge bridge fixing structure pier sectional view is provided for the present application.

[0033] Figure 8 A steel structure truss arch bridge bridge fixing structure support part and compensation part structure diagram is provided for the present application.

[0034] In the figure: 1, deck; 2, truss bridge; 3, truss tail beam; 4, fixed ring; 5, installation part; 51, pier; 52, butt joint groove; 53, adjusting channel; 54, groove; 55, positioning ring; 56, guard plate; 57, hydraulic rod; 6, butt joint part; 61, compensation arm; 62, connecting ring; 63, limiting plate; 64, cable; 7, compensation part; 71, triangular plate; 72, adjusting arm; 73, compensation column; 74, hinge block; 75, guide disc; 76, bottom sealing plate; 8, support part; 81, pressure plate; 82, reinforcing plate; 83, spherical cap; 9, detection platform; 10, detection equipment. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] Please refer to Figures 1-8 The present application provides a technical solution: a steel structure truss arch bridge bridge fixing structure, comprising a deck 1, a truss bridge 2 and a truss tail beam 3 and a fixed ring 4, the installation part 5 of the present case is installed below the deck 1, used for installing the butt joint part 6 and the compensation part 7, the butt joint part 6 of the present case is installed on the installation part 5, used for self-adaptive adjustment of the balance degree of the truss bridge 2 and the truss tail beam 3, the compensation part 7 of the present case is installed on the installation part 5, used for automatic emergency compensation of bridge inclination offset, the support part 8 of the present case is installed at the bottom of the installation part 5, used for positioning and supporting the truss bridge 2.

[0037] In the present embodiment, the truss bridge 2 is installed on the deck 1, and the truss tail beam 3 is fixedly connected to both tail ends of the truss bridge 2, and the fixed ring 4 is fixedly connected to the two truss tail beams 3.

[0038] The installation part 5 includes a pier body 51, two inclined surfaces are symmetrically arranged at the top of the pier body 51, two butt grooves 52 are arranged on one side of the inclined surface of the pier body 51, two adjusting channels 53 are arranged on one side of the pier body 51, the two adjusting channels 53 are in communication with the two butt grooves 52, a groove 54 is arranged on the other side of the inclined surface of the pier body 51, two positioning rings 55 are arranged on the top of the pier body 51, four protective plates 56 are arranged on the top of the inclined surface of the pier body 51, the four protective plates 56 are symmetrically arranged on the two sides of the groove 54, and a hydraulic rod 57 is hinged between the two protective plates 56 on the same side, each hydraulic rod 57 is provided 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, so as to gain time for emergency response, the inner walls of the two butt grooves 52 are arc surfaces away from one side of the two compensation arms 61 respectively, the other two tail ends of the truss bridge 2 are arc structures and are inserted into the two butt grooves 52 respectively, and the inner arc surfaces of the two arc tail ends of the truss bridge 2 are respectively attached to the arc surfaces of the butt grooves 52.

[0039] It is worth noting that the butt joint part 6 includes the compensation arm 61, adopts a composite material sandwich structure, polyurethane buffer blocks are arranged at both ends of the compensation arm 61, when the displacement exceeds the designed maximum value (usually ±50mm), the movement range is limited, and the steel cable 64 is prevented from being overloaded and broken, the compensation arm 61 is inserted into the butt groove 52 and abuts against the tail end of the truss bridge 2 adjacent to the compensation arm 61, the bottom end of the compensation arm 61 is fixedly connected with the connecting ring 62, the top of the compensation arm 61 is fixedly connected with the limiting plate 63 which is a U-shaped structure, the tail end of the compensation arm 61 is attached between the two ear ends of the limiting plate 63, the connecting ring 62 is fixedly connected with the steel cable 64, the movable end of the steel cable 64 extends out of the adjusting channel 53 and is wound on the fixed ring 4 on the same plane, the wound 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 butt joint parts 6 is two, the other butt joint part 6 is arranged in the other butt groove 52, and the two butt joint parts 6 are symmetrically arranged.

[0040] The compensation part 7 includes two triangular plates 71, the two triangular plates 71 are fixedly connected with the inner walls on the two sides of the groove 54 respectively, an adjusting arm 72 is hinged between the two triangular plates 71, a compensation column 73 is fixedly connected with the end of the adjusting arm 72, a pull-wire type displacement sensor is integrated in the compensation column 73, an MPS-M explosion-proof pull-wire type displacement sensor is adopted, four hinge blocks 74 are fixedly connected with the outer wall of the compensation column 73, four guide discs 75 are fixedly sleeved on the outer wall of the compensation column 73, and a bottom sealing plate 76 is fixedly connected between the two guide discs 75 on the same side.

[0041] It is worth noting that the support part 8 includes two pressure plates 81, the top of the upper pressure plate 81 is fixedly connected with a reinforcing plate 82, the two pressure plates 81 are fixedly connected with a spherical cap 83, the two pressure plates 81 are connected with bolts, the pier 51 is fixedly connected on the top of the upper pressure plate 81 through the reinforcing plate 82, the two triangular plates 71 are fixedly connected on the top of the upper pressure plate 81, the inner rod end of each hydraulic rod 57 is respectively hinged between the two hinge blocks 74 on the same side, the piston rod of the hydraulic rod 57 is accurately telescopic in a PWM pulse width modulation mode, pushes the compensation column 73 to curve, the displacement direction of the compensation column 73 is opposite to the inclination direction, if the bridge inclines to the left, the compensation column moves to the right, the two steel cables 64 in the two abutments 6 are all around the outer wall of the compensation column 73, and each steel cable 64 respectively passes between the two guide discs 75 and the bottom sealing plate 76 on the same side.

[0042] The top of the lower pressure plate 81 is provided with a detection table 9 on both sides, the detection table 9 is provided with a detection device 10, and the detection device 10 is in contact with the bottom of the upper pressure plate 81, the two detection devices 10 are pressure sensors, and the ZC2101L type IEPE piezoelectric pressure sensor is adopted, and the two detection devices 10 are electrically connected with the two hydraulic rods 57.

[0043] Working principle, the pressure sensor installed on the detection table 9 on both sides of the top of the lower pressure plate 81 continuously monitors the pressure data transmitted by the upper pressure plate 81, once the bridge vibrates, inclines or deviates due to dynamic load such as vehicle load and wind load, the pressure distribution of the upper pressure plate 81 changes, the pressure sensor can quickly capture these changes, and when the pressure difference ΔP detected by the pressure sensors on both sides exceeds a threshold value (such as 5% of the design load), the compensation program is triggered, the sensor transmits the ΔP signal to the controller of the hydraulic rod 57, and the required compensation displacement δ is calculated through a built-in algorithm (formula: δ=K・ΔP・L² / (EA), wherein K is a structural stiffness coefficient, L is a span, and EA is a cable tensile stiffness).

[0044] When the pressure sensor detects pressure abnormalities, it is judged that the bridge inclines and deviates, and immediately sends a signal to the hydraulic rod 57 electrically connected thereto, after the hydraulic rod 57 receives the signal, starts to act according to the preset program, the hydraulic rod 57 telescopes to push the compensation column 73, drives the adjusting arm 72 to rotate around the hinge point of the triangular plate 71, synchronously pulls the steel cable 64 through the guide disc 75 and the bottom sealing plate 76 and provides tension, and corrects the deviation of the truss bridge 2.

[0045] The compensation arm 61 of the docking part 6 abuts against the tail end of the truss bridge 2, and the steel cable 64 on the bottom end connecting ring 62 is wound around the fixed ring 4 and the positioning ring 55. When the compensation column 73 moves to one side of the curve, the steel cable 64 is tensioned under tension, and the compensation arm 61 is pulled to further abut against the tail end of the truss bridge 2 inserted into the docking groove 52, and the angle correction of the truss bridge 2 is realized through the tension of the fixed ring 4, and the automatic emergency treatment is carried out. According to the inclination and deviation of the bridge, the balance degree of the truss bridge 2 and the truss tail beam 3 is adjusted adaptively, so that the bridge structure is restored to stability.

[0046] The four guide discs 75 on the compensation column 73 form a steel cable guide system with the bottom sealing plate 76, which ensures that the steel cable 64 maintains a stable included angle (usually designed as 120°-150°) when the compensation column is displaced, and maximizes the tension conversion efficiency. When the compensation column 73 moves by δ distance, the effective length change ΔL of the steel cable 64 is 2δ・sinθ (θ is the included angle between the steel cable and the compensation column axis, usually 30°-45°), and according to Hooke's law, additional tension ΔT=EA・ΔL / L0 (L0 is the original length of the steel cable) is generated.

[0047] By adjusting the elastic modulus of the compensation arm 61, the stiffness of the compensation arm 61 and the stiffness of the tail end of the truss bridge 2 form a proportional relationship of 1:3-1:5, which ensures that the compensation force is transmitted in a flexible manner, avoids excessive secondary internal force, and integrates a cable displacement sensor inside the compensation column 73 to monitor the displacement δ in real time and compare it with the theoretical calculation value. When the deviation exceeds ±2mm, the controller automatically adjusts the output power of the hydraulic rod.

[0048] Through this differential compensation mechanism that converts the displacement of the compensation column 73 into the tension of the steel cable 64, the fixed structure realizes active, accurate 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.

[0049] The two pressure plates 81 of the support part 8 are connected through the spherical crown 83 and the bolts, and the reinforcing plate 82 on the top of the upper pressure plate 81 is fixed with the pier 51 of the mounting part 5. This structure provides stable positioning support for the truss bridge 2, disperses and transmits the bridge load, enhances the stability of the overall structure, and helps the docking part 6 and the compensation part 7 maintain the stability of the bridge.

[0050] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Similarly, the terms "one" and "the" do not exclude the presence of more than one item, unless the context clearly indicates otherwise. Further, the terminology "an" and "one" are used in the detailed description and claims only to mean one or more, at least one, or "at least one." Finally, the words "comprise," "comprises," and "comprising" and the like, are to be construed in their broadest, intended, and open ended form to encompass events that would otherwise prevent a process, method, article, or apparatus from being encompassed by the claim.

Claims

1. A bridge fixing structure for a steel truss arch bridge, characterized in that, Include: Bridge deck (1); Truss bridge (2) and truss tail beam (3); Fixed ring (4); Mounting portion (5) mounted below the bridge deck (1) for mounting butt joint portion (6) and compensation portion (7); The mounting portion (5) comprises a pier body (51), two inclined surfaces are symmetrically arranged on the top of the pier body (51), two butt joints (52) are arranged on one side of the inclined surface of the pier body (51), two adjusting channels (53) are arranged on one side of the pier body (51), the two adjusting channels (53) are communicated with the two butt joints (52), a groove (54) is arranged on the other side of the inclined surface of the pier body (51), two positioning rings (55) are mounted on the top of the pier body (51), four protective plates (56) are mounted on the top of the inclined surface of the pier body (51), four protective plates (56) are symmetrically arranged on both sides of the groove (54), and two hydraulic rods (57) are hinged between the two protective plates (56) on the same side. Butt joint portion (6) is installed on the mounting portion (5) for self-adaptive adjustment of the balance of the truss bridge (2) and the truss tail beam (3). The butt joint portion (6) comprises a compensation arm (61), the compensation arm (61) is inserted into the butt joint (52) and abuts against the tail end of the truss bridge (2) adjacent to itself, the bottom end of the compensation arm (61) is fixedly connected with a connecting ring (62), the top of the compensation arm (61) is fixedly connected with a limiting plate (63) which is a U-shaped structure, the tail end of the compensation arm (61) is fitted between the two ear ends of the limiting plate (63), the connecting ring (62) is fixedly connected with a steel cable (64), the movable end of the steel cable (64) extends out of the adjusting channel (53) and is wound on the fixed ring (4) on the same plane, and the wound end of the steel cable (64) continues to extend and is fixed on the positioning ring (55) on the same plane. The compensation portion (7) is installed on the mounting portion (5) for automatic emergency compensation of the bridge inclination deviation. The compensation portion (7) comprises two triangular plates (71), the inner walls of the two triangular plates (71) are fixedly connected with the two sides of the groove (54), respectively, and an adjusting arm (72) is hinged between the two triangular plates (71), the end of the adjusting arm (72) is fixedly connected with a compensation column (73), the outer wall of the compensation column (73) is fixedly connected with four hinge blocks (74), the outer wall of the compensation column (73) is fixedly sleeved with four guide discs (75), and the bottom sealing plate (76) is fixedly connected between the two guide discs (75) on the same side. The support portion (8) is installed at the bottom of the mounting portion (5) for positioning and supporting the truss bridge (2).

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

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

4. The bridge fixation structure for a steel structure truss arch bridge according to claim 3, characterized in that: The number of the butt joint parts (6) is two, and the other butt joint part (6) is arranged in the other butt groove (52), and the two butt joint parts (6) are arranged symmetrically.

5. The bridge fixation structure for a steel structure truss arch bridge according to claim 1, characterized in that: The support part (8) comprises two pressure plates (81), the top of the upper pressure plate (81) is fixedly connected with a reinforcing plate (82), the two pressure plates (81) are fixedly connected with a spherical cap (83), the two pressure plates (81) are connected with bolts, and the pier (51) is fixedly connected on the top of the upper pressure plate (81) through the reinforcing plate (82).

6. The bridge fixation structure for a steel structure truss arch bridge according to claim 5, characterized in that: The two triangular plates (71) are fixedly connected with the top of the upper pressure plate (81), the inner rod end of each hydraulic rod (57) is hingedly connected between two hinge blocks (74) on the same side, and the two steel wires (64) in the two butt joint parts (6) pass around the outer wall of the compensation column (73).

7. The bridge fixation structure for a steel structure truss arch bridge according to claim 6, characterized in that: The top of the lower pressure plate (81) is provided with a detection table (9) on both sides, the detection table (9) is provided with a detection device (10), and the bottom of the upper pressure plate (81) is in contact with the detection device (10), the two detection devices (10) are pressure sensors, and the two detection devices (10) are electrically connected with the two hydraulic rods (57).

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