Construction method for installing steel cover beam on arch of concrete-filled steel tubular arch bridge

Abstract

The invention discloses a construction method for installing a steel cover beam on the arch of a concrete-filled steel tube arch bridge, belonging to the technical field of design and manufacturing processes of bridge engineering structures. A construction method for installing a steel cover beam on the arch of a concrete-filled steel tube arch bridge is provided, which has relatively high construction efficiency and can relatively ensure the construction quality, especially the linear quality of the arch bridge. In the construction method, when preparing the steel cover beam on the arch, the bottom connection column head assembly at the bottom is not welded first. After the welding of other parts except the integral connection column head assembly is completed and the inspection is qualified, the bottom connection column head assembly is constructed on it, and the bottom connection column head assembly is arranged at the bottom of the steel cover beam on the arch through a fixed cross beam in a movable manner. Then, the steel cover beam on the arch is hoisted onto the concrete-filled steel tube arch bridge by a lifting device and connected into a whole with the corresponding position of the concrete-filled steel tube arch bridge through the movable bottom connection column head assembly during the adjustment process.

Description

Technical Field

[0001] The present invention relates to a construction method, in particular to a construction method for installing the upper steel cover beam of a concrete-filled steel tube arch bridge, belonging to the technical field of the design and manufacturing process of bridge engineering structures. Background Technique

[0002] Arch bridges have a long development history in China. There were many types in ancient times and it was one of the most common bridge types at that time. Because arch bridges have many good structural characteristics, such as: large spanning capacity, relatively high bearing capacity compared to other bridge types, beautiful shape, relatively economical, and there are many types of materials for building bridges, such as: masonry materials, concrete materials, steel materials, etc. Therefore, in the long river of history, arch bridges have endured because of their unique status.

[0003] With the rapid development of China's economy, bridges have shown a blowout development. In the new era of rapid development, all industries regard industry innovation as the focus of development. Our bridge structures also place innovation at the top priority. Therefore, based on long-term learning and on-site construction experience, during the closure construction of the main span of a long-span concrete-filled steel tube arch bridge, there will be errors between the main span linear control and the design. Therefore, there will be errors in the dimensions and heights of the columns and steel cover beams on the arch, etc. The existing traditional construction is to measure the transverse, longitudinal and top elevations after construction is completed, and then carry out in-site prefabrication production after determining the specific parts. However, the entire construction seriously affects the construction period. Therefore, it is necessary to study these technical problems that have long troubled us, and finding a technical solution to solve the problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a construction method for installing the upper steel cover beam of a concrete-filled steel tube arch bridge with relatively high construction efficiency and relatively guaranteed construction quality, especially the linear quality of the arch bridge.

[0005] The technical solution adopted to solve the above technical problem is: a construction method for installing the upper steel cover beam of a concrete-filled steel tube arch bridge, the construction method includes the following steps,

[0006] Step 1: According to the requirements of the drawings, first process and manufacture each component of the upper steel cover beam of the arch bridge in the processing factory, and do not process the bottom connection column head assembly. After the other parts of the steel cover beam are processed, conduct acceptance;

[0007] Step 2: Assemble the upper steel cover beam of the arch bridge according to the construction plan and design drawings, and inspect each welding part and welding quality during the assembly welding process;

[0008] Step 3: After the welding of the upper-arch steel cover beam is completed, the construction of the bottom connection column head assembly is carried out. Before the construction of the bottom connection column head assembly, use a steel ruler to measure the designed position of the bottom connection column head assembly.

[0009] Step 4: After the designed position is determined, weld the sliding column head and the fixed cross beam of the bottom connection column head assembly according to the relevant geometric dimensions at the determined position. During the welding process of the fixed cross beam, first determine the position and the sliding range of the sliding column head. The bottom sliding column head adopts the same material and size as the steel pier column.

[0010] Step 5: After the position measurement is completed, compare it with the existing construction procedures and the construction specifications to ensure that the overall sliding range of the sliding column head is within the possibility of the entire construction.

[0011] Step 6: After the position is determined and the welding of the sliding column head and the fixed cross beam is completed, then carry out the construction of installing the fixed cross beam and the sliding column head into the upper-arch steel cover beam.

[0012] Step 7: After the construction of the fixed cross beam, the sliding column head and the upper-arch steel cover beam is completed, conduct the construction acceptance again, and inspect the key parts such as the top block, the sliding column head and the stiffening plate again. After meeting the design requirements, carry out the docking hoisting construction of the upper-arch steel cover beam and the steel pier column.

[0013] Step 8: After all the acceptance is completed, carry out the construction of the buckling lock. Before the construction of the buckling lock, confirm the upper-arch steel cover beam, confirm the overall center of gravity and the hoisting point position of the upper-arch steel cover beam to ensure the smoothness of the overall hoisting process.

[0014] Step 9: After the overall construction is completed, conduct the overall acceptance of the hoisting points and the upper-arch steel cover beam, and inspect the hoisting points and the upper-arch steel cover beam as a whole. After passing the inspection, put it into use.

[0015] Furthermore, when assembling the upper-arch steel cover beam according to the design drawings, assemble the hoisting connection components on the upper-arch steel cover beam at the same time. The hoisting connection components include at least two groups of connecting ear sets, and each group of the connecting ear sets is fixedly installed in the upper middle part of the upper-arch steel cover beam along the long direction; during the assembly process of the upper-arch steel cover beam, the lower ends of the hoisting components are respectively fixedly connected with each of the connecting ear sets.

[0016] The preferred method of the above solution is that each group of the connecting ear sets respectively includes two connecting ears. The two connecting ears of each group are symmetrically arranged on the webs at the upper middle parts on both sides of the upper-arch steel cover beam. Stiffening plates are respectively arranged on both sides of each connecting ear, and reinforcing plates are also arranged outside the hoisting holes of each connecting ear.

[0017] Furthermore, when hoisting the fabricated steel capping beam on the arch onto the steel pier column, the hoisting connection assembly uses the hoisting assembly to hoist the steel capping beam on the arch onto the steel pier column with the cooperation of an external hoisting device, and connects it to the corresponding part of the steel pier column through the slidable column head of the connection column head assembly.

[0018] The preferred mode of the above solution is that the hoisting assembly includes multiple sets of hoisting balance connecting piece groups with the same quantity as the connection lug groups. The external hoisting equipment is respectively connected to the steel capping beam on the arch through the corresponding hoisting balance connecting piece groups in cooperation with the corresponding connection lug groups.

[0019] Furthermore, each set of the hoisting balance connecting piece groups includes a rigid shoulder pole beam, two shackles, two connecting steel ropes, and a set of hoisting connecting pieces. The two ends of the rigid shoulder pole beam are respectively connected to two connection lugs of a set of connection lug groups through one of the shackles and one of the connecting steel ropes. The external hoisting equipment is connected to one of the rigid shoulder pole beams through the hoisting connecting pieces.

[0020] The preferred mode of the above solution is that each set of the hoisting connecting pieces includes a hoisting steel wire rope and two shackles. The two ends of the rigid shoulder pole beam are respectively fixedly connected to the two ends of the hoisting steel wire rope through the two shackles. The external hoisting equipment is connected to the hoisting steel wire rope. Each rigid shoulder pole beam is respectively connected to the external hoisting equipment through the hoisting steel wire rope under the running car hanging parts and the hoisting cable.

[0021] Furthermore, when fabricating the slidable column head, a slidable column head with a truss structure is formed by welding a slidable base, a slidable column head body, and a movable crossbeam rod. An active positioning hole is provided at the lower end of the slidable column head body, and a positioning steel plate is provided on the slidable base to complete the fabrication of the slidable column head.

[0022] The beneficial effects of the present invention are as follows: In the technical solution provided by this application, when fabricating the steel cover beam on the arch, the bottom connection column head assembly at the bottom is not welded first. After the welding of other parts except the integral connection column head assembly is completed and the inspection is qualified, the bottom connection column head assembly is constructed on it, and the bottom connection column head assembly is movably arranged at the bottom of the steel cover beam on the arch through the fixed cross beam. Then, the steel cover beam on the arch is hoisted onto the concrete-filled steel tube arch bridge by a hoisting device and connected to the corresponding position of the concrete-filled steel tube arch bridge as a whole during the adjustment process through the movable bottom connection column head assembly. Since this application realizes the connection with the concrete-filled steel tube arch bridge by movably arranging the bottom connection column head assembly at the bottom of the steel cover beam on the arch, it is possible not to measure the lateral, longitudinal, and top elevation of the completed concrete-filled steel tube arch bridge in advance, but to adjust through the bottom connection column head assembly and then fix it after passing the inspection. This can not only make the construction efficiency relatively high, but also relatively ensure the construction quality, especially the linear quality of the arch bridge.

[0023] Through long-term research and efforts, the technical solution of this application has finally solved the problems that have long troubled us. First, it solves the long-term problem of the plane position. Through years of construction and learning, we have improved the bottom connection part of the steel cover beam to make it movable, capable of planar movement on the plane, and movable to any position on the plane, ultimately achieving the goals of high construction quality and fast construction speed. The lifting points during the construction of the steel cover beam are also a major problem, so through improvement, we have ultimately achieved the goal of fast construction on the premise of ensuring safety and quality. Through the above innovative improvements, we have well solved the technical problems of slow construction speed, poor construction quality, and high safety risks during the construction process. The innovative design also plays a crucial role in our construction management and construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the front view of the construction method for installing the steel cover beam on the arch of the concrete-filled steel tube arch bridge of the present invention;

[0025] Figure 2 is Figure 1 the side view of.

[0026] In the figure, the markings are: the steel cover beam body on the arch 1, the hoisting connection assembly 3, the hoisting assembly 4, the fixed cross beam 5, the slidable base 7, the slidable column head 8, the movable cross beam rod 9, the movable positioning hole 10, the positioning steel plate 11, the connection ear group 12, the connection ear 13, the stiffening plate 14, the reinforcing plate 15, the lifting balance connection assembly group 16, the rigid shoulder beam 17, the shackle 18, the connection steel rope 19, the lifting connection piece 20, the lifting steel wire rope 21, the under-hanging part of the trolley 22, the hoisting cable 23. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] As Figure 1 , Figure 2 shown, the present invention provides a construction method for installing the steel cover beam on the arch of a concrete-filled steel tube arch bridge, which has relatively high construction efficiency and can relatively ensure the construction quality, especially the linear quality of the arch bridge. The construction method includes the following steps,

[0028] Step 1: According to the requirements of the drawings, first process and manufacture each component of the steel cover beam 1 on the arch in the processing factory, without processing the bottom connection column head assembly, and conduct acceptance after the other parts of the steel cover beam are processed;

[0029] Step 2: Assemble the steel cover beam 1 on the arch according to the construction plan and design drawings, and inspect each welding part and welding quality during the assembly welding process;

[0030] Step 3: After the steel cover beam 1 on the arch is welded, then carry out the construction of the bottom connection column head assembly. Before the construction of the bottom connection column head assembly, use a steel ruler to measure the designed position of the bottom connection column head assembly;

[0031] Step 4: After the designed position is determined, weld the sliding column head 8 and the fixed cross beam 5 of the bottom connection column head assembly respectively according to the relevant geometric dimensions at the determined position. During the welding process of the fixed cross beam 5, first determine the position and the sliding range of the sliding column head 8. The sliding column head 8 adopts the same material and size as the steel pier column;

[0032] Step 5: After the position measurement is completed, compare with the existing construction procedures and construction specifications to ensure that the overall sliding range of the sliding column head 8 is within the possibilities existing in the whole construction;

[0033] Step 6: After the position is determined and the sliding column head 8 and the fixed cross beam 5 are welded, then carry out the construction of installing the bottom fixed cross beam 5 and the sliding column head 8 into the steel cover beam 1 on the arch;

[0034] Step 7: After the construction of the bottom fixed cross beam 5, the sliding column head and the steel cover beam 1 on the arch is completed, conduct construction acceptance again, and inspect the key parts such as the top block, the sliding column head 8 and the stiffening plate 14 again. After meeting the design requirements, carry out the docking hoisting construction of the steel cover beam 1 on the arch and the steel pier column;

[0035] Step 8: After all the acceptance is completed, carry out the construction of the buckle lock. Before the construction of the buckle lock, confirm the steel cover beam 1 on the arch, confirm the overall center of gravity and the hoisting point position of the steel cover beam 1 on the arch to ensure the smoothness of the whole hoisting process;

[0036] Step 9: After the overall construction is completed, conduct an acceptance inspection on the overall lifting points and the steel cover beam 1 above the arch, and inspect the overall lifting points and the steel cover beam 1 above the arch. After passing the inspection, it can be put into use. The technical solution provided by this application is that when preparing the steel cover beam above the arch, the bottom connection column head assembly at the bottom is not welded first. After the welding of other parts except the integral connection column head assembly is completed and the inspection is qualified, then construct the bottom connection column head assembly on it, and arrange the bottom connection column head assembly to the bottom of the steel cover beam above the arch through the fixed cross beam in a movable manner. Then, use the lifting equipment to hoist the steel cover beam above the arch onto the concrete-filled steel tube arch bridge and connect it as a whole with the corresponding position of the concrete-filled steel tube arch bridge through the movable bottom connection column head assembly during the adjustment process. Since this application realizes the connection with the concrete-filled steel tube arch bridge by arranging the bottom connection column head assembly at the bottom of the steel cover beam above the arch in a movable manner, it is possible not to measure the lateral, longitudinal, and top elevation of the completed concrete-filled steel tube arch bridge in advance, but to adjust it through the bottom connection column head assembly and then fix it after passing the inspection. This can not only make the construction efficiency relatively high, but also relatively ensure the construction quality, especially the linear quality of the arch bridge.

[0037] The technical solution of this application has finally solved the problems that have long troubled us through long-term research and efforts. First, solve the problem of the plane position that has long troubled us. Through years of construction and learning, we have improved the bottom connection part of the steel cover beam to make it movable, so that it can move horizontally on the plane and can be moved to any position on the plane, ultimately achieving the goals of high construction quality and fast construction speed. The lifting points during the construction of the steel cover beam are also a major problem. Therefore, through improvement, we have also achieved the goal of fast construction on the premise of ensuring safety and quality. Through the above innovative improvements, we have well solved the technical problems of slow construction speed, poor construction quality, and high safety risks during the construction process. The innovative design is also crucial for our construction management and construction progress.

[0038] In the above-described embodiments, according to the actual production situation and combined with the force-bearing situation of the arch bridge, in order to improve the operability of installation and increase production efficiency, when assembling the upper-arch steel cover beam 1 according to the design drawings in the present application, a hoisting connection assembly 3 is assembled on the upper-arch steel cover beam 1 at the same time. The hoisting connection assembly 3 includes at least two groups of connecting lug groups 12, and each group of the connecting lug groups 12 is fixedly installed in the upper-middle part of the upper-arch steel cover beam 1 in sequence along the long direction; during the assembly process of the upper-arch steel cover beam 1, the lower ends of the hoisting assemblies 4 are respectively fixedly connected to each of the connecting lug groups 12. Specifically, each group of the connecting lug groups 12 respectively includes two connecting lugs, and the two connecting lugs of each group are symmetrically arranged on the webs of the upper-middle parts on both sides of the upper-arch steel cover beam 1. Stiffening plates 14 are respectively arranged on both sides of each connecting lug 13, and reinforcing plates 15 are arranged outside the hanging holes of each connecting lug 13. Then, when hoisting the fabricated upper-arch steel cover beam 1 onto the steel pier column, the upper-arch steel cover beam 1 is hoisted onto the steel pier column by using the hoisting assembly 4 through the hoisting connection assembly 3 with the cooperation of an external hoisting device, and is connected to the corresponding part of the steel pier column through the slidable column head 8 of the connecting column head assembly. Considering the actual situation, the hoisting assembly 4 described in the present application includes multiple sets of hoisting balance connecting member groups 16 with the same number as the number of the connecting lug groups 12, and the external hoisting equipment is respectively connected to the upper-arch steel cover beam 1 through the corresponding hoisting balance connecting member groups 16 in cooperation with the corresponding connecting lug groups 12. At this time, each set of the hoisting balance connecting member groups 16 preferably includes a rigid carrying beam 17, two shackles 18, two connecting steel ropes 19, and a set of hoisting connecting members 20. The two ends of the rigid carrying beam 17 are respectively connected to the two connecting lugs 13 of a set of connecting lug groups 12 through a shackle 18 and a connecting steel rope 19, and the external hoisting equipment is connected to a rigid carrying beam 17 through the hoisting connecting members 20. Each set of the hoisting connecting members 20 preferably includes a hoisting steel wire rope and two shackles 18. The two ends of the rigid carrying beam 17 are respectively fixedly connected to the two ends of the movable crossbeam rod 21 through two shackles 18. The external hoisting equipment is connected to the movable crossbeam rod 21, and each rigid carrying beam 17 is respectively connected to the external hoisting equipment through the movable crossbeam rod 21 under the running car hanging member 22 and the hoisting cable 23.

[0039] Furthermore, when manufacturing the slidable column head 8 in the present application, the slidable base 7, the slidable column head 8 body, and the movable crossbeam rod 9 are welded into a truss-structured slidable column head 8, and a movable positioning hole 10 is provided at the lower end of the slidable column head body 8, and a positioning steel plate 11 is provided on the slidable base 7 to complete the manufacturing of the slidable column head 8.

[0040] In summary, when using the construction method provided by this application to install the deck girders on the arch of a long-span concrete-filled steel tube arch bridge, not only is the construction fast, the installation convenient, and the reliability high, but also the construction time can be significantly reduced. Through the innovative design of the sliding column head at the bottom of the steel deck girder for planar movement and the lifting point structure, the on-site construction is efficient, occupies less land, and is economical and practical. Specific Embodiment

[0042] The assembly structure of this application consists of 12 parts.

[0043] 1) Hoisting cable, 2) Steel wire rope, 3) Rigid ribbon beam, 4) Shackle, 5) Hanging part under the trolley, 6) Buckle lock, 7) Top reinforcement rib plate, 8) Fixed cross beam, 9) Sliding column head, 10) Stiffening plate, 11) Reinforcing plate, 12) Ear plate.

[0044] The raw materials of the above-mentioned parts are all simple and easy to obtain, the construction is convenient, the operation is simple, the mechanical properties are good, the cost is low, it is convenient and practical, and it is safe and environmentally friendly.

[0045] Embodiment 1

[0046] A flexible interface is adopted at the bottom of the steel deck girder, and the interface position can be moved up, down, left, and right. Since there are certain differences between the line shape and the plane position after the construction of the concrete-filled steel tube arch bridge and the designed line shape and plane position, through the improvement of the adjustable positioning device at the bottom of the steel deck girder, it not only ensures that no internal stress will be increased due to line shape and plane position problems during the later installation of the steel deck girder, but also greatly improves the construction efficiency and reduces the cost. In traditional construction, the bottom of the steel deck girder is not processed, and after the concrete-filled steel tube is closed, it is confirmed according to the closed line shape and then produced. This not only has slow construction efficiency, but also plays a crucial role in reducing the later line shape of the arch bridge.

[0047] Step 1: According to the requirements of the drawings, first process each component of the steel deck girder in the processing factory. The sliding column head part at the bottom is not processed, and after the other parts of the steel deck girder are processed, they are inspected.

[0048] Step 2: Assemble the steel deck girder according to the construction plan and design drawings, and inspect each welding part and welding quality during the assembly welding process.

[0049] Step 3: After the steel deck girder is welded, construct the bottom movable column head. Before constructing the bottom movable column head, use a steel ruler to measure the designed position.

[0050] Step 4: After the designed position is determined, weld the sliding column head. During the welding of the slideway, first determine the position and the sliding range.

[0051] After the position is determined, compare it with the previous construction and the construction specifications to ensure that the overall sliding range is within the possibilities existing in the whole construction.

[0052] Step 6: After the position determination is completed, construct the bottom slidable column head. The bottom slidable column head uses the same materials and dimensions as the steel pier column.

[0053] Step 7: After the construction of the movable steel cover beam column head is completed, conduct the construction acceptance again. Re-inspect the key parts such as the top stop block, slidable column head, and stiffening plate. After meeting the design requirements, carry out the subsequent construction.

[0054] Step 8: After all the acceptance is completed, carry out the construction of the buckle lock. Before the construction of the buckle lock, confirm the steel cover beam, confirm the overall center of gravity and the hoisting point position of the steel cover beam to ensure the overall smoothness of the hoisting process.

[0055] Step 9: After the overall construction is completed, conduct the acceptance of the overall hoisting point and the steel cover beam, and inspect the overall hoisting point and the steel cover beam. After passing the inspection, put it into use.

Claims

1. Construction method for installing steel cover beam on arch of concrete-filled steel tube arch bridge, characterized in that: The described construction method includes the following steps: Step 1: According to the requirements of the drawings, first process and manufacture each component of the upper-arch steel cover beam (1) in the processing factory. The bottom connection column head assembly is not processed and will be inspected after the other parts of the steel cover beam are processed. Step 2: Assemble the upper-arch steel cover beam (1) according to the construction plan and design drawings, and inspect each welding part and welding quality during the assembly welding process. Step 3: After the welding of the upper-arch steel cover beam (1) is completed, then carry out the construction of the bottom connection column head assembly. Before the construction of the bottom connection column head assembly, use a steel ruler to measure the design position of the bottom connection column head assembly. Step 4: After the design position is determined, weld the sliding column head (8) and the fixed cross beam (5) of the bottom connection column head assembly respectively according to the relevant geometric dimensions at the determined position. During the welding process of the fixed cross beam (5), first determine the position and the sliding range of the sliding column head (8). The sliding column head (8) uses the same material and size as the steel pier column. Step 5: After the position measurement is completed, compare with the existing construction procedures and construction specifications to ensure that the overall sliding range of the sliding column head (8) is within the possibility of the entire construction. Step 6: After the position is determined and the welding of the sliding column head (8) and the fixed cross beam (5) is completed, then carry out the construction of installing the bottom fixed cross beam (5) and the sliding column head (8) into the upper-arch steel cover beam (1). Step 7: After the construction of the fixed cross beam (5), the sliding column head, and the upper-arch steel cover beam (1) is completed, conduct a construction acceptance again. Re-inspect the key parts such as the top stop block, the sliding column head (8), and the stiffening plate (14). After meeting the design requirements, carry out the docking hoisting construction of the upper-arch steel cover beam (1) and the steel pier column. Step 8: After all the acceptance is completed, carry out the construction of the buckle lock. Before the construction of the buckle lock, confirm the upper-arch steel cover beam (1), confirm the overall center of gravity and the hoisting point position of the upper-arch steel cover beam (1) to ensure the overall smoothness of the hoisting process. Step 9: After the overall construction is completed, conduct an overall acceptance of the hoisting points and the upper-arch steel cover beam (1), and inspect the hoisting points and the upper-arch steel cover beam (1) as a whole. After passing the inspection, it can be put into use. Among them, when hoisting the manufactured upper-arch steel cover beam (1) onto the steel pier column, the upper-arch steel cover beam (1) is hoisted onto the steel pier column through the cooperation of the hoisting connection assembly (3) and the hoisting assembly (4) with an external hoisting device, and is connected to the corresponding part of the steel pier column through the sliding column head (8) of the connection column head assembly. When manufacturing the sliding column head (8), weld the sliding base (7), the sliding column head body, and the movable cross beam rod (9) into a truss-structured sliding column head (8), and set an activity positioning hole (10) at the lower end of the sliding column head body, and set a positioning steel plate (11) on the sliding base (7) to complete the manufacture of the sliding column head (8).

2. The construction method for installing the steel cover beam above the arch of a concrete-filled steel tubular arch bridge according to claim 1, characterized in that: When assembling the upper-arch steel cover beam (1) according to the design drawings, the hoisting connection assembly (3) is assembled on the upper-arch steel cover beam (1) at the same time. The hoisting connection assembly (3) includes at least two groups of connecting lug groups (12), and each group of the connecting lug groups (12) is fixedly installed on the upper-middle part of the upper-arch steel cover beam (1) in sequence along the long direction; during the assembly process of the upper-arch steel cover beam (1), the lower ends of the hoisting assemblies (4) are respectively fixedly connected to each of the connecting lug groups (12).

3. The construction method for installing the steel cover beam on the arch of a concrete-filled steel tube arch bridge according to claim 2, characterized in that: Each group of the connecting lug groups (12) respectively includes two connecting lugs. The two connecting lugs of each group are symmetrically arranged on the webs of the upper-middle parts on both sides of the upper-arch steel cover beam (1). Stiffening plates (14) are respectively arranged on both sides of each connecting lug (13), and reinforcing plates (15) are arranged outside the hanging holes of each connecting lug (13).

4. The construction method for installing the steel cover beam on the arch of a concrete-filled steel tubular arch bridge according to claim 1, 2 or 3, characterized in that: The hoisting assembly (4) includes multiple sets of hoisting balance connecting piece groups (16) with the same quantity as that of the connecting lug groups (12). External hoisting equipment is respectively connected to the upper-arch steel cover beam (1) through the corresponding hoisting balance connecting piece groups (16) in cooperation with the corresponding connecting lug groups (12).

5. The construction method for installing the upper steel cover beam of a concrete-filled steel tubular arch bridge according to claim 4, characterized in that: Each set of the hoisting balance connecting piece groups (16) includes a rigid balance beam (17), two shackles (18), two connecting steel ropes (19) and a group of hoisting connecting pieces (20). The two ends of the rigid balance beam (17) are respectively connected to the two connecting lugs (13) of a group of connecting lug groups (12) through one of the shackles (18) and one of the connecting steel ropes (19). External hoisting equipment is connected to one of the rigid balance beams (17) through the hoisting connecting pieces (20).

6. The construction method for installing the steel cover beam above the arch of a concrete-filled steel tubular arch bridge according to claim 5, characterized in that: Each group of the hoisting connecting pieces (20) includes a hoisting steel wire rope and two of the shackles (18). The two ends of the rigid balance beam (17) are respectively fixedly connected to the two ends of the movable crossbeam rod (21) through the two shackles (18). External hoisting equipment is connected to the movable crossbeam rod (21). Each of the rigid balance beams (17) is respectively connected to external hoisting equipment through the movable crossbeam rod (21) under the running car hanging parts (22) and the hoisting ropes (23).

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