Auxiliary mounting and adjusting device for front section of arch rib of concrete-filled steel tube arch bridge

Abstract

The invention discloses an auxiliary mounting and adjusting device for a first section of an arch rib of a concrete-filled steel tube arch bridge, which belongs to the technical field of bridge construction equipment and comprises a hinge shaft component, a bilateral positioning support assembly and a multi-dimensional posture adjusting mechanism. Wherein the articulated shaft assembly is fixedly arranged at the end part of the first section; the double-side positioning support assembly is rotationally connected to the two ends of the hinge shaft in a sleeving mode and comprises a supporting shell and a pressure-bearing bottom plate; the multi-dimensional posture adjusting mechanism is connected between the supporting shell and the pressure-bearing bottom plate and used for driving the pressure-bearing bottom plate to generate vertical displacement and multi-directional inclination movement relative to the supporting shell. Traditional manual jack passive adjustment is replaced by the integrated mechanical active adjustment mechanism, in-situ fine adjustment of the arch rib first section under the heavy load working condition is achieved, the problems that in traditional construction, adjustment efficiency is low, precision control is difficult and safety risks are high are solved, and the prefabricated construction level is improved.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction equipment technology, specifically relating to an auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge. Background Technology

[0002] Long-span steel-concrete composite arch bridges are widely used in transportation construction in complex terrains such as canyons and rivers due to their advantages of strong span capacity, high load-bearing potential, and aesthetic appeal. These bridges typically employ cable-stayed construction systems for segmental assembly. The first segment of the arch rib, serving as the foundation for the entire arch, directly determines the alignment quality of all subsequent segments and the stress state of the completed bridge through the accuracy of its installation position and orientation. In conventional construction, the first segment of the arch rib is hoisted to the arch abutment pit by a cable crane. After adjusting its approximate orientation using a system of guy ropes and slings, it is lowered onto the pre-cast arch abutment foundation. Once positioned, the spatial coordinates and three-dimensional orientation angles of the first segment are precisely adjusted until they meet design accuracy requirements. Subsequently, reinforcement is tied and concrete is poured to permanently bond it to the arch abutment.

[0003] Existing technologies for installing and adjusting the first segment of the arch rib have significant limitations, primarily relying on a "passive manual adjustment" mode. Specifically, after the first segment is positioned, fine-tuning its posture typically requires multiple construction workers to operate multiple hydraulic jacks in deep foundation pits or at high altitudes, coordinating the lifting and adjusting the elevation and inclination by adding or removing steel shims. This traditional method is inefficient and labor-intensive. The placement, lifting, and shim replacement of the jacks are extremely cumbersome, and the adjustments between the various support points exhibit a coupling effect, often requiring repeated iterations to approximate the design position. Construction workers must operate for extended periods in the confined space beneath the heavy-load component; any jack depressurization or slippage could lead to a serious safety accident. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge, which solves the technical problems of low efficiency and difficulty in precision control of manual adjustment in the traditional installation of the first segment of the arch rib.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a hinge shaft assembly, a double-sided adjusting support assembly, and a multi-dimensional attitude adjustment mechanism; the hinge shaft assembly includes a transverse rotating shaft fixed at the middle of the end of the first segment of the arch rib, the transverse rotating shaft extending horizontally and serving as the pitch adjustment core of the first segment; the double-sided adjusting support assembly includes two symmetrically distributed adjusting units, the two adjusting units being rotatably sleeved at both ends of the transverse rotating shaft, each adjusting unit including a support housing and a pressure-bearing base plate located below the support housing; the multi-dimensional attitude adjustment mechanism is connected between the support housing and the pressure-bearing base plate, and is used to drive the pressure-bearing base plate to produce vertical displacement and multi-directional tilting relative to the support housing.

[0006] Optionally, the side wall of the support housing is provided with a rotary shaft hole, and the two ends of the transverse rotating shaft are respectively pivotally connected to the corresponding rotary shaft hole; the device also includes a spacer rod, which is transversely arranged between the two support housings, and its two ends are respectively connected to the opposite side walls of the two support housings through threaded fasteners to lock the axial distance between the two adjustment units.

[0007] Optionally, the multi-dimensional attitude adjustment mechanism includes a vertically arranged central lifting rod and a ball joint; a first internally threaded hole is provided at the center of the support housing, the central lifting rod is threaded into the first internally threaded hole, and its bottom end extends to the bottom of the support housing; a spherical groove is provided at the center of the upper surface of the pressure-bearing base plate, the ball joint is connected to the bottom end of the central lifting rod, and is rotatably fitted in the spherical groove.

[0008] Optionally, the multi-dimensional attitude adjustment mechanism further includes at least three circumferentially distributed edge attitude adjustment rods; a vertically penetrating second internal threaded hole is correspondingly opened at the edge position of the support housing, and the edge attitude adjustment rod is threaded into the corresponding second internal threaded hole; the bottom end of the edge attitude adjustment rod is provided with a hemispherical contact, and the hemispherical contact abuts against the upper surface of the pressure-bearing base plate.

[0009] Optionally, the top end faces of both the central lifting rod and the edge attitude adjustment rod are provided with non-circular driven slots.

[0010] Optionally, a detachable drive power module is also included; the detachable drive power module is covered on the top of the support housing, and includes a motor mounting bracket, a guide cover plate, a transmission sleeve, and a servo motor assembly; the servo motor assembly is mounted on the motor mounting bracket and is used to independently drive the central lifting rod and the edge attitude adjustment rod to rotate through the transmission components in the transmission sleeve.

[0011] Optionally, the transmission sleeve is fixedly connected between the motor mounting bracket and the guide cover plate; the detachable drive power module further includes a rotating inner sleeve and a telescopic drive shaft, the rotating inner sleeve is rotatably disposed inside the transmission sleeve and is connected to the servo motor assembly for transmission, the telescopic drive shaft is axially slidably disposed inside the rotating inner sleeve and rotates synchronously with it; the bottom end of the telescopic drive shaft is provided with a non-circular drive head, the non-circular drive head can be inserted into and cooperate with the driven slot.

[0012] Optionally, the upper part of the telescopic drive shaft is provided with a radial limiting flange; the inner cavity of the rotating inner sleeve is provided with a pre-tightening spring, which abuts against the inner wall of the rotating inner sleeve and the radial limiting flange; in the natural state, the non-circular drive head extends out of the bottom end of the transmission sleeve under the biasing force of the pre-tightening spring.

[0013] Optionally, the bottom of the guide cover is provided with a groove that matches the shape of the top of the support housing; the guide cover and the side wall of the support housing are respectively provided with corresponding locking mounting holes, and the detachable drive power module is rigidly fixed to the support housing by passing a locking bolt through the locking mounting hole.

[0014] Optionally, it also includes a suspension operation system; the suspension operation system includes a main load-bearing sling and a secondary auxiliary sling, the main load-bearing sling being connected to the truss structure of the first segment of the arch rib; the top of the motor mounting frame is provided with a lifting lug, and the secondary auxiliary sling is connected to the lifting lug, for synchronously lifting the detachable drive power module along with the first segment of the arch rib.

[0015] The beneficial effects of this invention are as follows: This invention integrates a multi-dimensional attitude adjustment mechanism between the supporting shell and the pressure-bearing base plate, internalizing the adjustment function as part of the device itself. This design allows the device to still drive the pressure-bearing base plate to produce precise vertical displacement and multi-directional tilting relative to the supporting shell through the internal movement of the mechanism, even under arch rib load conditions. This achieves a shift from manual assisted adjustment to mechanized active adjustment, not only reducing reliance on temporary equipment such as jacks on-site and lowering the labor intensity of workers, but also ensuring precise control of the spatial position and attitude angle of the first segment through the deterministic movement of the mechanism, significantly improving construction efficiency and installation quality.

[0016] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 A schematic diagram of the device construction for this invention embodiment; Figure 2 A schematic diagram of the first segment structure of the arch rib in this embodiment of the invention; Figure 3 A schematic diagram of the installation of the double-sided adjustable support assembly according to an embodiment of the present invention; Figure 4 A schematic diagram of the support shell structure of this invention embodiment; Figure 5 A schematic diagram of the double-sided adjustable support assembly of this invention is provided. Figure 6 A schematic diagram of the multi-dimensional attitude adjustment mechanism of this invention is provided. Figure 7 A cross-sectional view of the double-sided adjusting support assembly and the multi-dimensional attitude adjustment mechanism of the present invention; The following markings are used in the attached diagram: 1. First segment of arch rib; 21. Transverse rotating shaft; 31. Support housing; 311. Rotary shaft hole; 312. First internal threaded hole; 313. Second internal threaded hole; 32. Pressure-bearing base plate; 321. Spherical groove; 33. Fixed-distance tie rod; 41. Central lifting rod; 411. Ball joint; 42. Edge attitude adjustment rod; 421. Hemispherical contact; 43. Driven slot; 51. Motor mounting bracket; 52. Guide cover plate; 521. Embedded groove; 53. Transmission sleeve; 54. Servo motor assembly; 55. Rotating inner sleeve; 56. Telescopic drive shaft; 561. Non-circular drive head; 562. Radial limiting flange; 57. Preload spring; 61. Main load-bearing sling; 62. Secondary auxiliary sling; 63. Lifting lug. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0019] Please see Figure 1-7It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0020] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0021] This invention provides an auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge, such as... Figure 1 and Figure 2 As shown, the main working object of this invention is the first segment 1 of the arch rib. As the foundation of an arch bridge, the first segment typically adopts a rectangular four-tube truss structure, which is internally welded into a spatial structural system with extremely high rigidity through multiple web members and transverse connecting pipes. To achieve the hinged installation of the first segment and the arch abutment foundation, this device is equipped with a hinge shaft assembly at the end of the first segment. The core component of this hinge shaft assembly is a transverse rotating shaft 21 that runs horizontally through the arch. This transverse rotating shaft 21 has sufficient bending strength and surface hardness. The transverse rotating shaft 21 is rigidly fixed to the center line of the end face of the first segment by welding or high-strength bolts, and its axis is horizontally set and completely coincides with the theoretical hinge axis of the arch bridge design. To reduce the frictional resistance during subsequent rotation adjustment, the surface of the transverse rotating shaft 21 can be finely ground and coated with a molybdenum disulfide lubricating layer or embedded with self-lubricating graphite pillars.

[0022] Specifically, such as Figure 3 , Figure 4 and Figure 5As shown, it also includes a double-sided adjusting support assembly. The adjusting support assembly contains two symmetrical adjusting units, which are respectively fitted onto the left and right ends of the transverse rotating shaft 21. Each adjusting unit mainly consists of two parts: a support housing 31 and a pressure-bearing base plate 32. The support housing 31 is a rigid component with a box-shaped structure. A large-diameter rotating shaft hole 311 is opened on the inner side wall of the support housing 31. A bearing bush is installed in this shaft hole, and the two ends of the transverse rotating shaft 21 are pivotally connected to this shaft hole. This fit allows the support housing 31 to rotate freely around the transverse rotating shaft 21, thereby ensuring that no matter what angle the first segment 1 of the arch rib is tilted, the support housing 31 can always maintain a vertical posture under the action of gravity, which is convenient for subsequent positioning. In order to prevent relative displacement or outward expansion of the two support housings 31 during hoisting or stress, one or more spaced tie rods 33 are transversely arranged between the two support housings 31. The two ends of the spacer rod 33 are threaded. After passing through the reserved holes in the side wall of the support housing 31, it is locked in place using double nuts, thereby locking the two independent adjustment units into a stable portal frame structure. Located below the support housing 31 is the bearing base plate 32. This is a large rectangular thick steel plate used to directly contact the concrete surface of the arch foundation, evenly distributing the upper load. The bearing base plate 32 is suspended below the support housing 31 by an adjustment mechanism, which provides room for subsequent attitude adjustments.

[0023] Specifically, such as Figure 5 , Figure 6 and Figure 7As shown, it also includes a multi-dimensional attitude adjustment mechanism, which adopts a mechanical screw drive structure to ensure construction safety by utilizing the self-locking characteristics of the thread. This mechanism mainly includes a central lifting rod 41 and an edge attitude adjustment rod 42. The central lifting rod 41 is located at the geometric center of the support housing 31 and vertically passes through the first internal threaded hole 312 on the top plate of the support housing 31. The threaded hole is machined with trapezoidal or rectangular threads to withstand enormous axial pressure. The bottom end of the central lifting rod 41 is designed with a high-precision ball joint 411. Correspondingly, a matching spherical groove 321 is milled at the center of the upper surface of the pressure-bearing base plate 32. The ball joint 411 is embedded in the spherical groove 321, forming a universal ball joint. This allows the pressure-bearing base plate 32 to not only rise and fall with the central lifting rod 41 to adjust its height, but also to tilt and swing in any direction around the center of this ball joint, thereby adapting to attitude deviations of the arch rib in various directions. To control this tilting and swaying, four edge adjustment rods 42 are respectively installed at the four corners of the support housing 31. These rods also pass through the second internal threaded hole 313 on the support housing 31 via threaded engagement. The bottom end of the edge adjustment rod 42 is machined into a smooth hemispherical contact 421, which directly abuts against the upper surface of the pressure base plate 32. By independently adjusting the length of these four edge adjustment rods 42 extending out of the support housing 31, the included angle between the support housing 31 and the pressure base plate 32 can be forcibly changed, thereby achieving fine adjustment of the lateral and longitudinal tilt of the first segment 1 of the arch rib. To facilitate external power drive, the top end faces of the central lifting rod 41 and all edge adjustment rods 42 are milled with uniformly sized driven slots 43, preferably internal hexagonal deep holes or internal octagonal deep holes.

[0024] Specifically, such as Figure 6 and Figure 7As shown, it also includes a detachable drive power module. The main frame of this module consists of an upper motor mounting bracket 51, a lower guide cover plate 52, and a transmission sleeve 53 connected in the middle. Five servo motor sets 54 are integrated and installed on the motor mounting bracket 51. Inside the transmission sleeve 53, a rotating inner sleeve 55 connected to the motor output shaft is provided. The rotating inner sleeve 55 has splined grooves or polygonal holes machined inside, in which a telescopic drive shaft 56 is slidably fitted. The bottom end of the telescopic drive shaft 56 is machined into a non-circular drive head 561 that matches the driven slot 43 at the top of the adjusting rod. A strong preload spring 57 is provided in the internal cavity of the rotating inner sleeve 55. The upper end of the spring abuts against the inner wall of the rotating inner sleeve 55, and the lower end abuts against the radial limiting flange 562 on the upper part of the telescopic drive shaft 56, always giving the telescopic drive shaft 56 a downward pop-out tendency. When the drive module is hoisted onto the support housing 31, if the non-circular drive head 561 is not aligned with the slot below, the drive head will be lifted and the spring will be compressed, preventing damage to the equipment from a hard collision. Once the motor starts and drives the drive head to rotate, the spring's restoring force will quickly push the drive head into the slot at the moment of alignment, achieving automatic engagement transmission. In addition, to ensure the stability of the drive module during operation, the bottom of the guide cover plate 52 is provided with a groove 521, which is adapted to the shape of the top of the support housing 31. The guide cover plate 52 and the side wall of the support housing 31 are respectively provided with locking mounting holes, and the two are rigidly connected by locking bolts.

[0025] Finally, as Figure 1 As shown, the device is also equipped with a suspension operation system. This system fully considers the installation conditions of each component. In addition to the main load-bearing sling 61 used for lifting the first section 1 of the arch rib, a lifting lug 63 is specially welded to the top of the motor mounting frame 51 of the drive power module for connecting the auxiliary sling 62. This dual-sling design allows the drive module to be lifted together with the arch rib, or to be lifted and retrieved separately after construction, realizing the reuse of valuable equipment.

[0026] refer to Figures 1-7 The specific construction steps of this invention are as follows: First, the truss welding of the first segment 1 of the arch rib is completed. During the welding process, the transverse rotating shaft 21 is precisely welded to the predetermined position at the end of the first segment, followed by ground assembly. The two double-sided adjusting support assemblies are respectively fitted into the two ends of the transverse rotating shaft 21. The two adjusting support assemblies are fixed by adjusting the distance tie rod 33, and the two detachable drive power modules are respectively hoisted above the support housing 31. After rough alignment by relying on the groove 521 at the bottom of the guide cover plate 52, it is lowered. After alignment, the locking bolts on the side are tightened to complete the mechanical fixation. Then, the power is turned on, and all motors are controlled to run at low speed. The elastic force of the pre-tension spring 57 is used to make all drive heads automatically spring into the driven slot 43 to complete the power engagement.

[0027] Connect the main load-bearing sling 61 of the cable crane to the first segment 1 of the arch rib, and simultaneously connect the auxiliary sling 62 to the lifting lug 63 on top of the drive module. After verification, the entire assembly is lifted. During aerial transport, the operator controls the cable crane to adjust the longitudinal inclination angle of the first segment 1 of the arch rib to bring it close to the design posture. At this time, due to gravity, the support shell 31 will naturally droop around the transverse pivot 21, while the bearing base plate 32 will be suspended below the support shell 31. When the component reaches above the arch base pit, the crane is directed to lower it slowly. An installation slot is reserved in the arch base pit. With guidance, the left and right bearing base plates 32 are accurately placed into the predetermined positions in the pit slots to complete the initial positioning. At this time, the bearing base plates 32 are in contact with the base, but the spatial coordinates and posture of the arch rib usually have deviations. According to measurement feedback, if the arch rib elevation is too low, the control center lifting rod 41 and the four edge adjustment rods 42 will rotate and extend synchronously. Using the thrust of the threaded drive, the supporting housing 31, along with the arch rib, is lifted as a whole until the design elevation is reached. If unevenness or torsional deviation of the arch rib is detected, the ball joint 411 at the bottom of the central lifting rod 41 acts as a fulcrum by extending and shortening the edge adjustment rod 42. The pressure-bearing base plate 32 deflects relative to the supporting housing 31, thereby adjusting the posture of the upper supporting housing 31 and the arch rib without changing the landing point of the base plate. After the transverse rotating shaft 21 is adjusted to the precise position, the angle of the first segment 1 of the arch rib is adjusted by the main load-bearing sling 61.

[0028] Once the first segment 1 of the arch rib meets the design accuracy requirements, the device is kept locked by using the traction suspension rope, and the locking bolts connecting the drive module and the support housing 31 are removed. The auxiliary lifting cable 62 is then used to vertically lift the two detachable drive power modules and retrieve them to the bridge deck for maintenance, preparing them for the installation of the next segment. Construction workers enter the foundation pit and tie reinforcing bars in the gap between the bearing base plate 32 and the pit sidewalls, and weld shear keys or studs to the outer wall of the support housing 31. Concrete is then poured to completely enclose the support housing 31, the bearing base plate 32, and the spacer rods 33.

[0029] Compared to existing construction technologies, this invention effectively replaces traditional manual adjustment operations. In the construction of the first segment of a traditional long-span arch bridge, fine-tuning of the arch rib's posture typically relies on workers manually operating hydraulic jacks, adding or removing steel shims, or using chain hoists for traction in deep foundation pits or on high-altitude slopes. Due to the difficulty of manual exertion in confined spaces and the coupling interference between adjustment points, the adjustment process requires repeated iterations, is extremely time-consuming, and involves immense labor intensity. This invention, by setting a detachable drive power module, transforms the arduous manual adjustment into automated mechanical adjustment driven by a motor. Construction personnel do not need to enter narrow and dangerous adjustment areas; they only need to control the servo motor unit 54 to drive the lead screw to rotate, which can quickly complete the lifting and tilting movements of the first segment. This automated operation significantly shortens the installation and commissioning cycle of a single segment, effectively reducing on-site labor and time costs. This device can achieve independent fine-tuning of the first segment 1 of the arch rib in multiple dimensions, including vertical height, lateral roll angle, and longitudinal pitch angle, even with the bearing base plate 32 fixed. This adjustment method avoids the structural instability problems that are easily caused by traditional single-point jacking, effectively ensuring the millimeter-level alignment between the first segment and the design axis, and laying a high-precision benchmark for the subsequent assembly of arch rib segments.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge, characterized in that: The system includes a hinge shaft assembly, a double-sided adjustment support assembly, and a multi-dimensional attitude adjustment mechanism. The hinge shaft assembly includes a transverse rotating shaft (21) fixed at the middle of the end of the first segment (1) of the arch rib. The transverse rotating shaft (21) extends horizontally and serves as the pitch adjustment core of the first segment. The double-sided adjustment support assembly includes two symmetrically distributed adjustment units. The two adjustment units are respectively rotatably sleeved at both ends of the transverse rotating shaft (21). Each adjustment unit includes a support housing (31) and a pressure-bearing base plate (32) located below the support housing (31). The multi-dimensional attitude adjustment mechanism is connected between the support housing (31) and the pressure-bearing base plate (32) and is used to drive the pressure-bearing base plate (32) to generate vertical displacement and multi-directional tilting action relative to the support housing (31).

2. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 1, characterized in that: The side wall of the support housing (31) is provided with a rotary shaft hole (311), and the two ends of the transverse rotating shaft (21) are respectively pivotally connected to the corresponding rotary shaft hole (311); the device also includes a fixed-distance tie rod (33), which is transversely arranged between the two support housings (31), and its two ends are respectively connected to the opposite side walls of the two support housings (31) through threaded fasteners to lock the axial distance between the two adjustment units.

3. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 1, characterized in that: The multi-dimensional attitude adjustment mechanism includes a vertically arranged central lifting rod (41) and a ball joint (411); a vertically penetrating first internal threaded hole (312) is opened at the center of the support housing (31), the central lifting rod (41) is threaded into the first internal threaded hole (312), and its bottom end extends to the bottom of the support housing (31); a spherical groove (321) is opened at the center of the upper surface of the pressure base plate (32), the ball joint (411) is connected to the bottom end of the central lifting rod (41), and is rotatably fitted in the spherical groove (321).

4. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 3, characterized in that: The multi-dimensional attitude adjustment mechanism also includes at least three circumferentially distributed edge attitude adjustment rods (42); the edge of the support housing (31) is provided with a vertically penetrating second internal thread hole (313), and the edge attitude adjustment rod (42) is threaded into the corresponding second internal thread hole (313); the bottom end of the edge attitude adjustment rod (42) is provided with a hemispherical contact (421), and the hemispherical contact (421) abuts against the upper surface of the pressure base plate (32).

5. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 4, characterized in that: The top end faces of the central lifting rod (41) and the edge attitude adjustment rod (42) are both provided with non-circular driven slots (43).

6. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 5, characterized in that: It also includes a detachable drive power module; the detachable drive power module is covered on the top of the support housing (31), and includes a motor mounting bracket (51), a guide cover plate (52), a transmission sleeve (53) and a servo motor assembly (54); the servo motor assembly (54) is mounted on the motor mounting bracket (51) and is used to independently drive the center lifting rod (41) and the edge attitude adjustment rod (42) to rotate through the transmission components in the transmission sleeve (53).

7. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 6, characterized in that: The transmission sleeve (53) is fixedly connected between the motor mounting bracket (51) and the guide cover plate (52); the detachable drive power module also includes a rotating inner sleeve (55) and a telescopic drive shaft (56). The rotating inner sleeve (55) is rotatably disposed inside the transmission sleeve (53) and is connected to the servo motor group (54) for transmission. The telescopic drive shaft (56) is axially slidably disposed inside the rotating inner sleeve (55) and rotates synchronously with it. The bottom end of the telescopic drive shaft (56) is provided with a non-circular drive head (561), which can be inserted into and cooperate with the driven slot (43).

8. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 7, characterized in that: The upper part of the telescopic drive shaft (56) is provided with a radial limiting flange (562); the inner cavity of the rotating inner sleeve (55) is provided with a pre-tightening spring (57), which abuts against the inner wall of the rotating inner sleeve (55) and the radial limiting flange (562); in the natural state, the non-circular drive head (561) extends out of the bottom end of the transmission sleeve (53) under the biasing force of the pre-tightening spring (57).

9. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 6, characterized in that: The bottom of the guide cover (52) is provided with a groove (521), which is adapted to the top shape of the support housing (31); the guide cover (52) and the side wall of the support housing (31) are respectively provided with corresponding locking mounting holes, and the detachable drive power module is rigidly fixed to the support housing (31) by passing the locking bolt through the locking mounting hole.

10. The auxiliary installation and adjustment device for the first segment of the arch rib of a steel-concrete composite arch bridge according to claim 6, characterized in that: It also includes a suspension operation system; the suspension operation system includes a main load-bearing sling (61) and a secondary auxiliary sling (62), the main load-bearing sling (61) is connected to the truss structure of the first segment (1) of the arch rib; the top of the motor mounting frame (51) is provided with a lifting ear plate (63), the secondary auxiliary sling (62) is connected to the lifting ear plate (63), and is used to synchronously lift the detachable drive power module with the first segment (1) of the arch rib.

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