An arch rib vertical assembly and rotation and positioning system and its application

Abstract

The present invention provides a vertical assembly and rotation-in-place system for arch ribs and its application. The system includes: a lowering cable fixing foundation, which includes a vertical rotation tower, and a tensioning jack is fixed at the top of the vertical rotation tower; a rear anchor device, which includes a second bearing platform, and a rear anchor jack is fixed at the top of the second bearing platform; a guy cable fixing foundation, which includes a third bearing platform, and a front anchor jack is fixed at the top of the third bearing platform; a lowering cable, one end of which is connected to the tensioning jack, and the other end is used to connect to the arch rib; an anchor cable, one end of which is connected to the rear anchor jack, and the other end is connected to the lowering cable fixing foundation; a guy cable, one end of which is connected to the front anchor jack, and the other end is used to connect to the arch rib; a rotatable structure, which is used to realize the rotatable connection between the arch rib segment and the arch seat. This system can be applied to the vertical assembly and rotation-in-place construction of arch ribs. The present invention provides a system for the rotation-in-place of arch ribs, which can complete the rotation construction without setting up a scaffold in water, avoiding the influence on the navigation of the waterway and flood discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a vertical assembly and rotation-in-place system for arch ribs and its application. Background Art

[0002] As a classic architectural form in bridges, Chinese arch bridges are widely known for their unique stress structure and beautiful and rhythmically changing bridge shapes. Among arch bridges, a bridge with an arch rib and a bridge deck as a common load-bearing structure is called an arch rib bridge, and the arch rib mostly adopts a concrete-filled steel tube structure.

[0003] At present, the vertical rotation construction of concrete-filled steel tube arch bridges mostly uses the horizontal assembly and direct lifting method. When assembling, a horizontal assembly support needs to be erected. For example, the invention patent application of CN118375076 A discloses a construction method for vertical rotation of arch ribs using rigid jacking. It is necessary to pre-install a main beam support, a main beam, an arch foot, and an arch rib support, place a pair of arch ribs on the corresponding arch rib supports on each side to support the arch ribs, and then the corresponding vertical rotation construction operations can be carried out. After the operation is completed, the main beam support and the arch rib support also need to be removed. However, if the bridge site is located in a river area and a support needs to be erected in the water, it will affect the navigation and flood discharge of the waterway to a certain extent. Moreover, if the bridge site is exactly located in a valley area, there will also be a problem that the support height is too high, resulting in difficult erection, and further extending the construction period. Therefore, to solve the above problems, it is very necessary to study a rotation-in-place system for arch ribs that can complete the rotation construction without erecting a support in the water. Summary of the Invention

[0004] The present invention provides a vertical assembly and rotation-in-place system for arch ribs and its application, providing a system that can complete the rotation construction without erecting a support in the water for the arch rib to be in place, avoiding the influence on the navigation and flood discharge of the waterway, and effectively shortening the construction period at the same time.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A vertical assembly and rotation-in-place system for arch ribs, comprising:

[0007] A lowering cable fixing foundation, which is arranged behind the arch rib abutment and at least includes one vertical rotation tower, and a tension jack is fixed on the top of the vertical rotation tower;

[0008] A rear anchor device, which is arranged behind the lowering cable fixing foundation and at least includes two second bearing platforms, and a rear anchoring jack is fixed on the top of each of the two second bearing platforms;

[0009] A guy wire fixing foundation, which is arranged in front of the arch rib abutment and at least includes two third bearing platforms, and a front anchoring jack is fixed on the top of each of the two third bearing platforms;

[0010] Lowering cable, one end of which is connected to the tensioning jack, and the other end is used to connect to the arch rib;

[0011] Anchoring cable, one end of which is connected to the rear anchoring jack, and the other end is connected to the top of the fixed foundation of the lowering cable;

[0012] Guy cable, one end of which is connected to the front anchoring jack, and the other end is used to connect to the arch rib;

[0013] Rotatable structure, which is used to realize the rotatable connection between the arch rib segment closest to the arch seat and the arch seat.

[0014] Preferably, it further includes a ladder cage, the ladder cage includes a plurality of ladder cage segments, a welding operation platform is arranged on one side of the top of each ladder cage segment, and the position of the welding operation platform matches the height position of the top of each arch rib segment during the vertical assembly of the arch rib.

[0015] Preferably, it further includes a temporary fixing structure; the temporary fixing structure is used to fixedly connect between the arch rib segment closest to the arch seat and the arch seat during the vertical assembly of the arch rib;

[0016] The rotatable structure includes an upper rotating hinge, a lower rotating hinge and a rotating shaft. The upper part of the upper rotating hinge is used to connect to the lower end of the arch rib segment closest to the arch seat, the lower rotating hinge is used to connect to the arch seat, and the upper rotating hinge and the lower rotating hinge are rotationally connected through the rotating shaft.

[0017] Preferably, the fixed foundation of the lowering cable includes a vertical rotation tower, a first bearing platform and a first pile foundation. The top of the first pile foundation is fixed with the first bearing platform. There are at least two first bearing platforms, and a vertical rotation tower is fixed on them. The vertical rotation tower includes columns and cross braces. There are at least two columns, which are respectively connected to one of the first bearing platforms, and the columns are arranged along the width direction of the arch rib, and at least two cross braces are connected at intervals between adjacent columns.

[0018] Preferably, the tensioning jack includes a first tensioning jack and a second tensioning jack. Two groups of first tensioning jacks and second tensioning jacks are symmetrically fixed on the top of the two columns; the lowering cable includes a first lowering cable and a second lowering cable; the two groups of first tensioning jacks are respectively connected to one end of the first lowering cable, and the other end of the first lowering cable is used to respectively connect to the upper middle part of the arch ring on the same side in the arch rib segment; the two groups of second tensioning jacks are respectively connected to one end of the second lowering cable, and the other end of the second lowering cable is used to respectively connect to the lower middle part of the arch ring on the same side in the arch rib segment.

[0019] Preferably, the rear anchor device includes a second bearing platform and second pile foundations. The top of each second pile foundation is fixed with a second bearing platform. Each post-anchoring jack on the top of the second bearing platform is connected to the top on the same side in the wind cable fixing foundation through the anchor cable. Generally, a ground anchor is adopted for the rear anchor device, which is lower than the connection position between the lowering cable and the arch rib segment.

[0020] Preferably, the wind cable fixing foundation includes a third bearing platform and third pile foundations. The top of each third pile foundation is fixed with a third bearing platform, and the third bearing platform is lower than the connection position between the lowering cable and the arch rib segment;

[0021] The front anchor jacks include two groups of first front anchor jacks and two groups of second front anchor jacks. The wind cables include a first wind cable and a second wind cable; on the top of each third bearing platform, a group of the first front anchor jacks and a group of the second front anchor jacks are fixed. The two groups of the first front anchor jacks are respectively connected to one end of the first wind cable, and the other end of the first wind cable is used to be respectively connected to the upper middle part of the arch ring on the same side in the arch rib segment; the two groups of the second front anchor jacks are respectively connected to one end of the second wind cable, and the other end of the second wind cable is used to be respectively connected to the lower middle part of the arch ring on the same side in the arch rib segment.

[0022] Preferably, a monitoring system is further included. The monitoring system includes a 4D laser point cloud acquisition device and a lowering control system. The lowering control system is electrically connected to the 4D laser point cloud acquisition device, the tensioning jacks, the rear anchor jacks and the front anchor jacks. The 4D laser point cloud acquisition device is installed in front of and behind the arch rib segment, and is used to collect data including the position coordinates and the line type of the arch rib segment, and transmit the data to the lowering control system. The lowering control system is used to control the operations of the tensioning jacks, the rear anchor jacks and the front anchor jacks.

[0023] The present invention also provides an application of the above-mentioned vertical assembly and rotation-in-place system of the arch rib in the construction of the arch rib, including the following steps:

[0024] S1. Complete the construction of the rear anchor device, the lowering cable fixing foundation and the wind cable fixing foundation, and pre-tighten the anchor cable between the rear anchor device and the lowering cable fixing foundation;

[0025] S2. Assemble the arch rib segments and install the lowering cables and the wind cables: Connect the arch rib segment closest to the arch seat to the arch seat through a rotatable structure, and fix the arch rib segment closest to the arch seat to the arch seat; then sequentially vertically assemble the arch rib segments on one side of the arch rib until the designed length is reached; during the vertical assembly process, or after the vertical assembly is completed, install the lowering cables and the guy cables and pre-tighten them;

[0026] S3. Swing construction: Release the fixed connection between the arch rib segment closest to the arch seat and the arch seat, and coordinately adjust the lengths of the lowering cables and guy cables through the tensioning jacks and the front anchoring jacks, so that the lower end of the arch rib segment rotates downward with the rotatable structure as the axis until it reaches the designed position.

[0027] Preferably, during the process of vertically assembling the arch rib segments on one side until the designed length is reached, a ladder cage is also erected in cooperation for welding between the arch rib segments;

[0028] The ladder cage includes a plurality of ladder cage segments, and a welding operation platform is arranged on one side of the top of each ladder cage segment;

[0029] After one arch rib segment is welded, erect a ladder cage segment to match the assembling height of the arch rib segment, then install the welding operation platform, and then hoist the next arch rib segment. Conduct the welding operation of adjacent arch rib segments on the highest welding operation platform that has been erected. After welding is completed, repeat the above steps until the arch rib segments reach the designed height.

[0030] The above-mentioned vertical assembly and swing-in-place system of the arch rib has the following advantages:

[0031] (1) The system of the present invention combines the use of a rotatable structure and a cable system of anchoring cables, guy cables and lowering cables to complete the vertical installation of the arch rib segments. Therefore, there is no need to erect a scaffold in the water, avoiding the influence on the navigation of the waterway and flood discharge, and also solving the problem that the scaffold is too high and difficult to erect in the valley area. At the same time, it can effectively shorten the construction period and reduce the construction cost of erecting the scaffold.

[0032] (2) By adopting a cable system combining anchoring cables, guy cables and lowering cables, and pre-tightening each cable in advance, the present invention can prevent the arch rib from tilting backward under the longitudinal wind load during the lowering instant, and increase the stability of its vertical assembly.

[0033] (3) By further combining the use of a temporary fixing structure and a ladder cage, the present invention can further ensure the stability and safety during the process of vertically assembling the arch rib segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of building the rear anchor device, the fixing foundation of the lowering cable and the fixing foundation of the guy cable in the construction method of the present invention.

[0035] Figure 2 It is a schematic diagram of installing a rotatable structure at the lower end of the arch rib segment closest to the arch seat and connecting it to the arch seat in the construction method of the present invention.

[0036] Figure 3 It is a schematic diagram of one side of the arch rib segment being assembled to reach the designed length in the construction method of the present invention.

[0037] Figure 4 It is a schematic diagram after removing the temporary fixing structure in the construction method of the present invention.

[0038] Figure 5 It is a schematic diagram when the arch rib segment rotates to reach the designed position in the construction method of the present invention.

[0039] Figure 6 It is Figure 3 an enlarged structural schematic diagram of the lowering cable fixing foundation in

[0040] Figure 7 It is Figure 6 a right view structural schematic diagram of

[0041] Figure 8 It is Figure 3 an enlarged structural schematic diagram of the rear anchor device in

[0042] Figure 9 It is Figure 8 a right view structural schematic diagram of

[0043] Figure 10 It is Figure 3 a left view enlarged structural schematic diagram of the guy cable fixing foundation in

[0044] [[ID=z39]]In the figure, there are rear anchor device 100, second bearing platform 101, second pile foundation 102, lowering cable fixing foundation 200, first bearing platform 210, first pile foundation 220, vertical rotation tower 230, column 231, cross bracing 232, arch seat 300, rotatable structure 400, lower hinge 401, upper hinge 402, rotating shaft 403, guy cable fixing foundation 500, third bearing platform 501, third pile foundation 502, temporary fixing structure 600, arch rib segment 700, cage 800, arch rib support 900, tensioning jack 1000, first tensioning jack 1001, second tensioning jack 1002, rear anchoring jack 1100, front anchoring jack 1200, first front anchoring jack 1201, second front anchoring jack 1202, lowering cable 1300, first lowering cable 1301, second lowering cable 1302, guy cable 1400, first guy cable 1401, second guy cable 1402, anchoring cable 1500. Specific Embodiments

[0045] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0046] An arch rib vertical assembly and rotation-in-place system, comprising a lowering cable fixing foundation 200, a rear anchor device 100, a guy wire fixing foundation 500, a lowering cable 1300, an anchoring cable 1500, a guy wire 1400, and a rotatable structure 400, wherein: The lowering cable fixing foundation 200 is arranged behind the arch rib abutment 300 and at least includes a vertical rotation tower 230, and a tensioning jack 1000 is fixed at the top of the vertical rotation tower 230; The rear anchor device 100 is arranged behind the lowering cable fixing foundation 200 and at least includes two second bearing platforms 101, and rear anchoring jacks 1100 are fixed at the tops of the two second bearing platforms 101; The guy wire fixing foundation 500 is arranged in front of the arch rib abutment 300 and at least includes two third bearing platforms 501, and front anchoring jacks 1200 are fixed at the tops of the two third bearing platforms 501; One end of the lowering cable 1300 is connected to the tensioning jack 1000, and the other end is used to connect to the arch rib. The length of the lowering cable 1300 can be adjusted by the tensioning jack 1000. Gradually increasing the length of the lowering cable 1300 can cause the arch rib to rotate downward; One end of the anchoring cable 1500 is connected to the rear anchoring jack 1100, and the other end is connected to the top of the lowering cable fixing foundation 200. By pre-tightening the anchoring cable 1500, the stability of the vertical rotation tower 230 during the tensioning process of the lowering cable 1300 can be better ensured; One end of the guy wire 1400 is connected to the front anchoring jack 1200, and the other end is used to connect to the arch rib. The length of the guy wire 1400 can be adjusted by the front anchoring jack 1200. During the downward rotation of the arch rib, the length of the guy wire 1400 gradually shortens, which can better stabilize the arch rib and prevent its position deviation caused by the influence of air flow; The rotatable structure 400 is used to realize the rotatable connection between the arch rib segment 700 closest to the abutment 300 and the abutment 300, and helps the arch rib segment 700 to complete the rotation-in-place operation.

[0047] Preferably, it further includes a cage 800. The cage 800 includes multiple cage segments. A welding operation platform is arranged on one side of the top of each cage segment. The position of the welding operation platform matches the height position of the top of each arch rib segment 700 during the vertical assembly of the arch rib, and it is installed around the periphery of the top of the arch rib segment 700. The cage 800 has stairs for construction workers to climb up and down conveniently, and there are fences around to prevent construction workers from falling. The construction workers walk to a certain height and then move to the construction operation platform, which can facilitate the welding operation in all directions of the arch rib segment 700.

[0048] Preferably, it further includes a temporary fixing structure 600; The temporary fixing structure 600 is used to fixedly connect between the arch rib segment 700 closest to the abutment 300 and the abutment 300 during the vertical assembly of the arch rib; The temporary fixing structure 600 is preferably installed at the front and rear of the lower end of the arch rib segment 700 closest to the abutment 300, that is, as Figure 2In the shown direction, on the left and right sides of the bottom end of the arch rib segment 700, the arch rib segment 700 is generally fixed to the arch abutment 300 by welding steel pipes. Of course, the arch abutment 300 is provided with corresponding embedded parts for connecting with the steel pipes. After the arch rib assembly is completed and before the rotation construction, the temporary fixing structure 600 needs to be removed so that the arch rib can rotate relative to the arch abutment 300. The rotatable structure 400 includes an upper rotating hinge 402, a lower rotating hinge 401, and a rotating shaft 403. The upper part of the upper rotating hinge 402 is used to connect to the lower end of the arch rib segment 700 closest to the arch abutment 300. The lower rotating hinge 401 is used to connect to the arch abutment 300. The upper rotating hinge 402 and the lower rotating hinge 401 are rotatably connected by the rotating shaft 403. To facilitate the installation of the lower rotating hinge 401, corresponding embedded parts are also provided in the arch abutment 300 for connecting with the arch abutment 300. In this embodiment, two sets of rotatable structures 400 are provided, and are respectively installed in Figure 2 the front and back of the middle part of the bottom end of the arch rib segment 700 in the shown direction, that is, corresponding to the middle positions of the bottom ends of the left and right arch rings respectively.

[0049] Preferably, the lowering cable fixing foundation 200 includes a vertical rotating tower 230, a first bearing platform 210, and a first pile foundation 220. The top of the first pile foundation 220 is fixed with the first bearing platform 210. There are at least two first bearing platforms 210, and the vertical rotating tower 230 is fixed on them. The vertical rotating tower 230 includes columns 231 and cross braces 232. There are at least two columns 231, which are respectively connected to one of the first bearing platforms 210. The columns 231 are arranged along the width direction of the arch rib. At least two cross braces 232 are connected at intervals between adjacent columns 231. Since the vertical rotating tower 230 bears a large load, in this embodiment, the first pile foundation 220 matched with each first bearing platform 210 uses 4 reinforced concrete pile foundations, which are located at the four corners of the bottom of the first bearing platform 210, and can be constructed in a conventional manner. The reinforced concrete pile foundations partially penetrate into the first bearing platform 210; embedded parts are provided in the first bearing platform 210 for connecting with the vertical rotating tower 230 to ensure the stability of the vertical rotating tower 230. For the columns 231, combined with Figure 6 and Figure 7 as shown, a steel pipe structure can be used to build a three-dimensional shape. Horizontal steel pipes and diagonal steel pipes are connected between the vertical steel pipes to form a stable triangular connection structure; the positions of the two columns respectively correspond to the positions of the left and right arch rings of the arch rib segment, and the spacing is matched with the spacing between the left and right arch rings, that is, the same or slightly larger or slightly smaller than the spacing between the left and right arch rings. The two columns are connected by cross braces, and the cross braces make the vertical rotating tower 230 an integral whole. The cross braces can adopt a truss structure.

[0050] Preferably, the tensioning jack 1000 includes a first tensioning jack 1001 and a second tensioning jack 1002. At the tops of the two columns 231, two sets of the first tensioning jack 1001 and the second tensioning jack 1002 are symmetrically fixed, that is, at the top of each column 231, a set of the first tensioning jack 1001 and a set of the second tensioning jack 1002 are fixed, which are symmetrically arranged with respect to the vertical center line of the vertical rotation tower 230; the lowering cable 1300 includes a first lowering cable 1301 and a second lowering cable 1302; the two sets of the first tensioning jacks 1001 are respectively connected to one end of the first lowering cable 1301, and the other end of the first lowering cable 1301 is used to be respectively connected to the upper middle part of the arch ring on the same side in the arch rib segment 700; the two sets of the second tensioning jacks 1002 are respectively connected to one end of the second lowering cable 1302, and the other end of the second lowering cable 1302 is used to be respectively connected to the lower middle part of the arch ring on the same side in the arch rib segment 700. In each set of the tensioning jacks 1000, one or more jacks can be included, which are set according to the load-bearing requirements. The first tensioning jack 1001 and the second tensioning jack 1002 can be fixed through an anchor box. The anchor box is welded or bolt-connected or pin-connected to the vertical rotation tower 230. If bolt connection or pin connection is adopted, the angle of the anchor box can be better adjusted, and then the angle of the tensioning jack 1000 can be adjusted. The connection between the first lowering cable 1301 and the second lowering cable 1302 and the arch ring can also be realized through anchor fittings.

[0051] Preferably, the rear anchor device 100 includes a second bearing platform 101 and a second pile foundation 102. As shown in Figure 8 and Figure 9 , at the top of the second pile foundation 102, the second bearing platform 101 is fixed. Each post-anchoring jack 1100 on the top of each second bearing platform 101 is connected to the top on the same side in the wind cable fixing foundation 500 through an anchoring cable 1500. In this embodiment, for each second bearing platform 101, the matching second pile foundation 102 adopts two reinforced concrete pile foundations. Embedded parts are arranged in the second bearing platform 101 for convenient connection with the post-anchoring jack 1100. Each post-anchoring jack 1100 arranged on the top of each second bearing platform 101 is respectively connected to the top of the column 231 on the same side. The post-anchoring jack 1100 can be fixed through an anchor box. Embedded parts are arranged in the second bearing platform 101, which are welded or bolt-connected or pin-connected to the anchor box. If bolt connection or pin connection is adopted, the angle of the anchor box can be better adjusted, and then the angle of the post-anchoring jack 1100 can be adjusted. The other end of the anchoring cable 1500 can also be connected to the wind cable fixing foundation 500 through anchor fittings.

[0052] Preferably, the rear anchor device 100 is lower than the connection position of the lowering cable 1300 and the arch rib segment 700. Generally, a ground anchor device is adopted, so that the stability of the rear anchor device 100 can be better ensured.

[0053] Preferably, the guy wire fixing foundation 500 includes a third bearing platform 501 and third pile foundations 502. The top of the third pile foundations 502 is fixed with the third bearing platform 501, and the third bearing platform 501 is lower than the connection position of the lowering cable 1300 and the arch rib segment 700. In this embodiment, for the arch rib segment on the other side of the arch rib, that is, in the direction as shown in Figure 3 the right arch rib segment in the right side has been pre-installed on the arch rib support 900. The construction of the right arch rib segment 700 is basically carried out on land, except that the arch rib segment farthest from the right arch seat is located above the river. In order to build the arch rib support 900 corresponding to support this arch rib segment, the third bearing platform 501 and the third pile foundations 502 need to be pre-installed. In this embodiment, the existing third bearing platform 501 and third pile foundations 502 are used as the guy wire fixing foundation 500. Each third bearing platform 501 is matched with corresponding third pile foundations 502, and 2 or 4 underwater concrete steel pipe piles are adopted. A front anchoring jack 1200 is arranged on the top of the third bearing platform 501. The front anchoring jack 1200 includes two groups of first front anchoring jacks 1201 and two groups of second front anchoring jacks 1202. The guy wire 1400 includes a first guy wire 1401 and a second guy wire 1402. A group of first front anchoring jacks 1201 and a group of second front anchoring jacks 1202 are fixed on the top of each third bearing platform 501. The two groups of first front anchoring jacks 1201 are respectively connected with one end of the first guy wire 1401, and the other end of the first guy wire 1401 is respectively connected with the middle upper part of the arch ring on the same side in the arch rib segment 700; the two groups of second front anchoring jacks 1202 are respectively connected with one end of the second guy wire 1402, and the other end of the second guy wire 1402 is respectively connected with the middle lower part of the arch ring on the same side in the arch rib segment 700. By arranging two layers of guy wires 1400, it can better prevent the arch rib from tilting backward under the longitudinal wind load during the lowering instant.

[0054] Preferably, it further includes a monitoring system, which includes a 4D laser point cloud acquisition device and a lowering control system. The lowering control system is electrically connected to the 4D laser point cloud acquisition device, the tensioning jack 1000, the rear anchoring jack 1100, and the front anchoring jack 1200. The 4D laser point cloud acquisition device is installed in front of and behind the arch rib segment 700. If it is used in a river-crossing bridge, generally, 4D laser point cloud acquisition devices are installed on both banks of the river to collect data including the position coordinates and line type of the arch rib segment 700 and transmit it to the lowering control system. The lowering control system is used to control the operation of the tensioning jack 1000, the rear anchoring jack 1100, and the front anchoring jack 1200. For the picture collected by the 4D laser point cloud acquisition device, the coordinate system needs to be converted after collection to obtain the position coordinates of the arch rib segment 700, and this conversion can be achieved by existing technologies. During the process of assembling the arch rib segment 700, the hoisting position of the arch rib segment 700 can be understood through the 4D laser point cloud acquisition device to assist in adjusting the hoisting position. During the rotation construction process, according to the feedback of the 4D laser point cloud acquisition device, the lowering control system can control the opening, closing, and cable force magnitude of the tensioning jack 1000, the rear anchoring jack 1100, and the front anchoring jack 1200 to control the lowering position of the arch rib segment 700 within the error range. The present invention also provides the application of the above arch rib vertical assembly and rotation positioning system in arch rib construction, including the following steps:

[0055] S1. As Figure 1 and Figure 2 shown, complete the construction of the rear anchor device 100, the lowering cable fixing foundation 200, and the guy wire fixing foundation 500, and pre-tighten the anchoring cable 1500 between the rear anchor device 100 and the lowering cable fixing foundation 200.

[0056] S2. Assemble the arch rib segment 700 and install the lowering cable 1300 and the guy wire 1400: As Figure 2 shown, connect the arch rib segment 700 closest to the arch seat 300 to the arch seat 300 through the rotatable structure 400, and fix the arch rib segment 700 closest to the arch seat 300 to the arch seat 300 through the temporary fixing structure 600; combined with Figure 3 shown, then use a large crane to sequentially vertically assemble the arch rib segments 700 on one side of the arch rib until the design length is reached; during the vertical assembly process, or after the vertical assembly is completed, install the lowering cable 1300 and the guy wire 1400 and pre-tighten them, where: one end of the lowering cable 1300 is connected to the tensioning jack 1000, and the other end is connected to the arch rib segment 700; one end of the guy wire 1400 is connected to the front anchoring jack 1200, and the other end is connected to the arch rib segment 700.

[0057] S3. Rotation construction: As Figure 4As shown, the fixed connection between the arch rib segment 700 closest to the arch abutment 300 and the arch abutment 300 is released, that is, the temporary fixing structure 600 is removed. The lengths of the lowering cable 1300 and the guy cable 1400 are coordinated and adjusted through the tensioning jack 1000 and the front anchoring jack 1200, so that the lower end of the arch rib segment 700 rotates downward with the rotatable structure 400 as the axis until it reaches the design position.

[0058] Subsequently, the alignment of the arch rib segments can be referred to the prior art. In this embodiment, the arch rib segments 700 on the other side have been installed in place. After the alignment of the arch rib segment 700 in place after rotation is completed, the welding and fixing with the arch rib segment 700 on the other side need to be completed, the connection between the arch rib segment 700 and the arch abutment 300 is completed, or the connection between the arch rib segment 700 in place after rotation and the arch abutment 300 is completed first, then the alignment connection between the two side arch beam segments 700 is completed, and finally the lowering cable 1300 is removed.

[0059] Preferably, during the process of vertically assembling the arch rib segments 700 on one side until the design length is reached, a ladder cage 800 is also erected in cooperation for welding between the arch rib segments 700; after one arch rib segment 700 is welded, a section of the ladder cage segment is erected to match the assembly height of the arch rib segment 700, then the welding operation platform is installed, and then the next arch rib segment 700 is hoisted, and the welding operation of the adjacent arch rib segments 700 is carried out on the highest welding operation platform that has been erected. After the welding is completed, the above steps are repeated until the arch rib segments 700 reach the design height.

Claims

1. An arch rib vertical assembly and rotation and positioning system, characterized in that Comprising: Lowering cable fixing foundation, which is arranged behind the arch rib abutment and includes at least one vertical rotation tower, and a tensioning jack is fixed at the top of the vertical rotation tower; Rear anchor device, which is arranged behind the lowering cable fixing foundation and includes at least two second bearing platforms, and rear anchoring jacks are fixed on the tops of the two second bearing platforms; Guy cable fixing foundation, which is arranged in front of the arch rib abutment and includes at least two third bearing platforms, and front anchoring jacks are fixed on the tops of the two third bearing platforms; Lowering cable, one end of which is connected to the tensioning jack and the other end is used to be connected to the arch rib; Anchoring cable, one end of which is connected to the rear anchoring jack and the other end is connected to the top of the lowering cable fixing foundation; Guy cable, one end of which is connected to the front anchoring jack and the other end is used to be connected to the arch rib; Rotatable structure, which is used to realize the rotatable connection between the arch rib segment closest to the abutment and the abutment; It further includes a temporary fixing structure; the temporary fixing structure is used to be fixedly connected between the arch rib segment closest to the abutment and the abutment during the vertical assembly of the arch rib; The rotatable structure includes an upper rotating hinge, a lower rotating hinge and a rotating shaft. The upper part of the upper rotating hinge is used to be connected to the lower end of the arch rib segment closest to the abutment, the lower rotating hinge is used to be connected to the abutment, and the upper rotating hinge and the lower rotating hinge are rotationally connected through the rotating shaft; The lowering cable and the guy cable are installed and pre-tightened during the vertical assembly process; The tensioning jack includes a first tensioning jack and a second tensioning jack, and two groups of first tensioning jacks and second tensioning jacks are symmetrically fixed at the top of the vertical rotation tower; the lowering cable includes a first lowering cable and a second lowering cable; the two groups of first tensioning jacks are respectively connected to one end of the first lowering cable, and the other end of the first lowering cable is used to be respectively connected to the upper middle part of the arch ring on the same side in the arch rib segment; the two groups of second tensioning jacks are respectively connected to one end of the second lowering cable, and the other end of the second lowering cable is used to be respectively connected to the lower middle part of the arch ring on the same side in the arch rib segment; The front anchoring jack includes two groups of first front anchoring jacks and two groups of second front anchoring jacks, and the guy cable includes a first guy cable and a second guy cable; one group of the first front anchoring jacks and one group of the second front anchoring jacks are fixed on the top of each third bearing platform. The two groups of first front anchoring jacks are respectively connected to one end of the first guy cable, and the other end of the first guy cable is used to be respectively connected to the upper middle part of the arch ring on the same side in the arch rib segment; the two groups of second front anchoring jacks are respectively connected to one end of the second guy cable, and the other end of the second guy cable is used to be respectively connected to the lower middle part of the arch ring on the same side in the arch rib segment; It further includes a monitoring system, which includes a 4D laser point cloud acquisition device and a lowering control system. The lowering control system is electrically connected to the 4D laser point cloud acquisition device, the tensioning jack, the rear anchoring jack and the front anchoring jack. The 4D laser point cloud acquisition device is installed in front of and behind the arch rib segment, and is used to collect data including the position coordinates and line type of the arch rib segment, and transmit the data to the lowering control system. The lowering control system is used to control the operations of the tensioning jack, the rear anchoring jack and the front anchoring jack.

2. The arch rib vertical assembly and rotation-in-place system according to claim 1, characterized in that: It further includes a ladder cage, which includes a plurality of ladder cage segments. A welding operation platform is provided on one side of the top of each ladder cage segment, and the position of the welding operation platform matches the height position of the top of each arch rib segment during the vertical assembly of the arch rib.

3. The arch rib vertical assembly and rotation-in-place system according to claim 1, characterized in that: The lowering cable fixing foundation includes a vertical rotation tower, a first bearing platform and a first pile foundation. The first pile foundation is fixed with the first bearing platform at the top. There are at least two first bearing platforms, and a vertical rotation tower is fixed on them. The vertical rotation tower includes columns and cross braces. There are at least two columns, which are respectively connected to one of the first bearing platforms. The columns are arranged along the width direction of the arch rib, and at least two cross braces are connected between adjacent columns at intervals.

4. The arch rib vertical assembly and rotation-in-place system according to claim 1, characterized in that: The rear anchor device includes a second bearing platform and a second pile foundation. The second pile foundation is fixed with the second bearing platform at the top. Each rear anchoring jack on the top of the second bearing platform is fixed to the top on the same side of the guy cable fixing foundation through the anchor cable.

5. The arch rib vertical assembly and rotation-in-place system according to claim 1, characterized in that: The guy cable fixing foundation includes a third bearing platform and a third pile foundation. The third pile foundation is fixed with the third bearing platform at the top. The third bearing platform is lower than the connection position of the lowering cable and the arch rib segment.

6. The application of the arch rib vertical assembly and rotation-in-place system according to any one of claims 1-5 in arch rib construction, including the following steps: S1. Complete the construction of the rear anchor device, the lowering cable fixing foundation and the guy cable fixing foundation, and pre-tighten the anchor cable between the rear anchor device and the lowering cable fixing foundation; S2. Assemble the arch rib segments and install the lowering cable and the guy cable: Connect the arch rib segment closest to the arch seat to the arch seat through a rotatable structure, and fix the arch rib segment closest to the arch seat to the arch seat; then sequentially vertically assemble the arch rib segments on one side of the arch rib upward until the design length is reached; during the vertical assembly process, install the lowering cable and the guy cable and pre-tighten them; S3. Rotation construction: Release the fixed connection between the arch rib segment closest to the arch seat and the arch seat, and coordinate and adjust the lengths of the lowering cable and the guy cable through the tensioning jack and the front anchoring jack, so that the lower end of the arch rib segment rotates downward with the rotatable structure as the axis until it reaches the design position.

7. Application of the vertical assembly and rotation-in-place system of arch ribs in arch rib construction according to claim 6, characterized in that: During the process of vertically assembling the arch rib segments on one side of the arch rib until the designed length is reached, a ladder cage is also assembled to facilitate welding between the arch rib segments; The ladder cage includes a plurality of ladder cage segments, and a welding operation platform is provided on one side of the top of each ladder cage segment; After one arch rib segment is welded, assemble one ladder cage segment to match the assembly height of the arch rib segment, then install the welding operation platform, and then hoist the next arch rib segment. Conduct welding operations on adjacent arch rib segments on the highest welding operation platform that has been assembled. After welding is completed, repeat the above steps until the arch rib segments reach the designed height.

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