A construction device and method for low-position closure of circular arc arch ribs

Abstract

This invention relates to a construction device and method for low-level closure of an arc-shaped arch rib. The arc-shaped arch rib construction device includes: an arch rib support, which includes multiple guide support devices spaced apart along the arch axis; a traction device for pulling arch rib segments, the traction device being supported above the guide support devices; and a driving device connected to the traction device, the driving device being able to pull the arch rib segments to move along the arch axis. During construction, no additional tower structure is required, resulting in lower construction costs. Furthermore, the guide support devices restrict the movement direction of the arch rib segments, ensuring their displacement trajectory and eliminating the need for external adjustment of the arch rib segments' movement direction, thus reducing construction difficulty.

Description

Technical Field

[0001] This invention relates to the field of bridge construction, and in particular to a construction device and method for low-position closure of a circular arc arch rib. Background Technology

[0002] Currently, the commonly used construction methods for circular arc arch ribs include the anchoring method, the rotation construction method, the lifting method, and the jacking method.

[0003] The construction methods include: anchoring, which requires a tall anchoring tower at the arch foot; rotation, which requires a tall vertical rotation tower at the arch foot; lifting, which requires a lifting support with high vertical stiffness; and jacking, which requires jacking equipment to adjust the position of the arch rib.

[0004] The anchoring method, rotation construction method, and lifting method all require additional auxiliary frames, resulting in high construction costs. The jacking method is difficult to construct because it is hard to control the direction of the front end of the arch rib during the jacking process. Summary of the Invention

[0005] This invention provides a low-position closure arc-shaped arch rib construction device and method to solve the problems of high cost or high construction difficulty in related technologies.

[0006] In a first aspect, a low-position closure arc-shaped arch rib construction device is provided, comprising: an arch rib support, the arch rib support including a plurality of guide support devices spaced apart along the arch axis; a traction device for traction of arch rib segments, the traction device being supported above the guide support devices; and a drive device connected to the traction device, the drive device being capable of traction of the traction device to move along the arch axis.

[0007] In some embodiments, the arch rib support includes arch foot supports located at both ends along the arch axis, and a drag zone support located between the two arch foot supports; the traction device is supported above the drag zone support.

[0008] In some embodiments, the traction device includes a stranded wire and a guide beam, one end of the stranded wire being connected to the drive device and the other end of the stranded wire being connected to the guide beam; the drag zone bracket includes a plurality of spaced-apart support columns; the guide beam is supported above at least two of the support columns.

[0009] In some embodiments, the guide support device includes an upward-opening steering groove that extends in a curved direction along the arch axis and is used to receive the stranded wire.

[0010] In some embodiments, the guide support device includes rolling elements with rolling axes arranged horizontally and perpendicular to the arch axis, the rolling elements being used to support arch rib segments.

[0011] In some embodiments, the arch rib support is also provided with a locking device.

[0012] Secondly, a low-level closure construction method is provided, which includes the following steps: constructing the aforementioned low-level closure arc-shaped arch rib construction device; connecting the arch rib segment to the end of the traction device away from the drive device; using the drive device to pull the traction device and the connected arch rib segment along the arch axis, and sequentially connecting the arch rib segment to be connected to the previous connected arch rib segment, so that the arch rib segments are connected end to end to form the main body of the arch rib.

[0013] In some embodiments, the arch rib support includes arch foot supports at both ends and a drag zone support located between the two arch foot supports. The traction device is supported above the drag zone support. The construction method further includes: installing the two arch foot segments onto the corresponding arch foot supports; traction of the arch rib body and connecting the arch rib body to the arch foot segment near the end of the driving device; and assembling a closure segment at the closure joint between the arch rib body and the other arch foot segment to form a bridge arch rib.

[0014] In some embodiments, the traction device includes a stranded wire connected to a drive device and a guide beam. After the arch foot segment is installed on the corresponding arch foot support, the construction method includes: pulling the stranded wire along the arch axis, causing the stranded wire to drag the arch rib segment through the guide beam until the distance between the guide beam and the arch foot segment near the drive device is less than a first distance; removing the guide beam and connecting the arch rib body by the stranded wire.

[0015] In some embodiments, the traction device is locked before each arch rib segment to be connected, and unlocked after the arch rib segment to be connected is connected to the previous connected arch rib segment.

[0016] The beneficial effects of the technical solution provided by this invention include:

[0017] This invention provides a low-position closure construction device and method for an arc-shaped arch rib. During construction, a driving device pulls a traction device, connecting the arch rib segment to the traction device to achieve traction of the arch rib segment. This allows for convenient adjustment of the arch rib segment's position. By setting guide support devices at intervals along the arch axis and supporting the traction device on these guide support devices, the traction device can move along the arch axis, ensuring the arch rib segment moves along the arch axis direction. This method eliminates the need for additional tower erection during construction, resulting in lower construction costs. Furthermore, the guide support devices restrict the movement direction of the arch rib segment, ensuring its displacement trajectory and eliminating the need for external adjustment, thus reducing construction difficulty. Therefore, this method reduces both the construction cost and difficulty of arch rib construction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an arch rib support built on the main beam, provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of the construction device for building a low-level closure arc-shaped arch rib on the main beam, provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the traction device provided in an embodiment of the present invention when it pulls a section of an arch rib.

[0022] Figure 4 This is a schematic diagram of the traction device for pulling two-stage arch rib segments according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure provided in an embodiment of the present invention when the distance between the guide beam and the arch foot segment near the driving device is less than a first distance;

[0024] Figure 6 This is a structural schematic diagram of the removal of the guide beam provided in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure when the main body of the arch rib is connected to the side arch foot segment of the driving device after the guide beam is removed, according to an embodiment of the present invention.

[0026] Figure 8 A schematic diagram of the structure of the bridge arch rib placed on the arch rib support before closure, provided in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the bridge arch rib after closure provided in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the main structure of the guide support device provided in an embodiment of the present invention;

[0029] Figure 11 A schematic diagram of the cross-sectional structure of the guide support device provided in an embodiment of the present invention;

[0030] Figure 12 A flowchart of a low-level closure construction method provided in an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Arch rib support; 11. Arch foot support; 12. Traction area support; 121. Support column; 122. Connecting beam;

[0033] 2. Traction device; 21. Stranded wire; 22. Guide beam;

[0034] 3. Drive unit;

[0035] 4. Guide support device; 41. Steering groove; 42. Rolling element;

[0036] 5. Crane;

[0037] 6. Main beam;

[0038] 7. Bridge arch rib; 71. Arch rib main body; 711. Arch rib segment; 72. Arch foot segment; 73. Closure segment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] This invention provides a low-position closure circular arc arch rib construction device and method, which can solve the problems of high cost or high construction difficulty in related technologies.

[0041] See also Figures 1 to 11As shown in the figure, a low-position closure arc-shaped arch rib construction device provided by an embodiment of the present invention may include: an arch rib support 1, the arch rib support 1 including a plurality of guide support devices 4 spaced apart along the arch axis; a traction device 2, the traction device 2 being used to traction arch rib segments 711, the traction device 2 being supported above the guide support devices 4; and a drive device 3, the drive device 3 being connected to the traction device 2, the drive device 3 being able to pull the traction device 2 to move along the arch axis. That is, by arranging the guide support devices 4 spaced apart along the arch axis, the traction device 2 can be moved along the arch axis during the process of the drive device 3 pulling the traction device 2. The traction process can be guided by the guide support devices 4, thus guiding the arch rib segments 711 dragged by the traction device 2. Dragging the arch rib segments 711 by traction, compared to the jacking method, allows for easier control of the movement direction of the arch rib segments 711, reduces the difficulty of construction, and facilitates long strokes. Furthermore, since the movement of the arch rib segment 711 is achieved by traction through the drive device 3, it is not necessary to build supports at both ends of the arch rib support 1, which reduces construction costs and improves construction efficiency.

[0042] Since the arch axis of the arc-shaped arch rib is arc-shaped, and the curvature of each arch rib segment 711 is the same, the arch rib segment 711 can be kept in contact with the arch rib support 1 during the dragging process by pulling the arch rib segment 711. In this embodiment, the drive device 3 is set at the arch foot segment 72. In other embodiments, the drive device 3 can be set on the main beam 6, and the drive device 3 is connected to the traction device 2 set on the guide support device 4 by means of a rope and roller. The drive device 3 can be a drag jack, which is used to pull the traction device 2. The drive device 3 can also be a winding wheel. In this embodiment, the traction device 2 includes a stranded wire 21 and a guide beam 22 connected to the stranded wire 21. In other embodiments, the arch rib segment 711 can be pulled directly by the stranded wire 21.

[0043] See also Figure 1 and Figure 2 As shown, in some optional embodiments, the arch rib support 1 includes arch foot supports 11 respectively located at both ends along the arch axis, and a drag zone support 12 located between the two arch foot supports 11; the traction device 2 is supported above the drag zone support 12. That is, by setting the arch foot supports 11, the arch foot segments 72 can be directly installed on the arch foot supports 11, reducing the number of arch rib segments 711 that need to be dragged, thereby reducing the load on the drive device 3. In this embodiment, the drive device 3 is connected to one of the arch foot segments 72, and before traction, the guide beam of the traction device 2 is located at the end of the drag zone support 12 away from the drive device 3.

[0044] See also Figure 1 and Figure 2 As shown, in some optional embodiments, the traction device 2 includes a stranded wire 21 and a guide beam 22. One end of the stranded wire 21 is connected to the drive device 3, and the other end of the stranded wire 21 is connected to the guide beam 22. The dragging area bracket 12 includes a plurality of spaced support columns 121. The guide beam 22 is supported above at least two of the support columns 121. That is, by supporting the guide beam 22 above two support columns 121, when dragging the arch rib segment 711, it can be ensured that the bottom of the whole formed by the guide beam 22 and the arch rib segment 711 has at least two fulcrums, avoiding excessive cantilever during the dragging process, which would cause the whole formed by the guide beam 22 and the arch rib segment 711 to deflect. In this embodiment, to avoid the arch rib segment 711 deflecting, a lighter material is used to make the guide beam 22, avoiding the center of gravity of the whole formed by the guide beam 22 and the arch rib segment 711 being at the front cantilever, which would cause the arch rib segment 711 to deflect and make it difficult to drag the arch rib segment 711. In this embodiment, the end of the guide beam 22 closest to the drive device 3 is set as a tapered structure so that the center of gravity of the straight body of the guide beam 22 is located at the end away from the drive device 3, thus avoiding the front end of the guide beam 22 from deflecting downwards during the dragging process.

[0045] See also Figure 1 , Figure 2 , Figure 10 as well as Figure 11 As shown, in some optional embodiments, the guide support device 4 includes an upward-opening steering groove 41 that bends and extends along the extension direction of the arch axis. The steering groove 41 is used to receive the stranded wire 21. That is, the traction device 2 moves along the arch axis by guiding the stranded wire 21 through the steering groove 41 that bends and extends along the extension direction of the arch axis. Figure 11 As shown, each guide support device 4 includes two steering grooves 41 spaced apart along the transverse direction of the bridge to guide the two strands 21. By setting the two strands 21 to simultaneously guide the guide beam 22 and the arch rib segment 711, the misalignment of the arch rib segment 711 can be reduced.

[0046] See also Figure 10 as well as Figure 11 As shown, in some optional embodiments, the guide support device 4 includes a rolling element 42, the rolling axis of which is horizontally arranged and perpendicular to the arch axis. The rolling element 42 is used to support the arch rib segment 711. That is, the rolling of the rolling element 42 makes dragging the arch rib segment 711 easier and reduces the load on the drive device 3.

[0047] In some optional embodiments, the arch rib support 1 is also provided with a locking device. The locking device can lock the arch rib segment 711 to provide a more stable installation environment for subsequent arch rib segments 711 to be connected. Specifically, the arch rib segment 711 can be locked by using the pulling jack of the locking drive device 3, or by using the locking cable 21, or by using a lifting device on the arch rib support 1 to lift the installed arch rib segment 711 and disengage it from the rolling element 42, thus achieving the locking of the arch rib segment 711.

[0048] See also Figure 12 As shown, this embodiment of the invention provides a low-level closure construction method, which may include: setting up the aforementioned construction device; connecting an arch rib segment 711 to the end of the traction device 2 away from the drive device 3; using the drive device 3 to pull the traction device 2 and the connected arch rib segment 711 along the arch axis, and sequentially connecting the arch rib segment 711 to be connected to the previous connected arch rib segment 711, so that the arch rib segments 711 are connected end to end to form the arch rib body 71. Figure 1 and Figure 2 As shown, the arch rib support 1 can be erected by hoisting the crane 5 located on the main beam 6, and the traction device 2's strand 21 and guide beam 22 can be hoisted into place by the crane 5. Figures 3 to 7 As shown, the process of sequentially connecting arch rib segments 711 using the traction device 2 to form the arch rib body 71 is as follows: Initially, the guide beam 22 and the drive device 3 are respectively positioned on opposite sides of the highest point of the arch rib support 1. The drive device 3 gradually pulls the guide beam 22 to lift it. When the distance between the guide beam 22 and the main beam 6 is longer than the length of one segment, the arch rib segment 711 is connected to the end of the guide beam 22. Whenever the distance between the entire connection between the guide beam 22 and the arch rib segment 711 and the main beam 6 is longer than the length of one segment, the next arch rib segment 711 to be installed is connected to the previously connected arch rib segment 711. This continues until the arch rib body 71 is formed.

[0049] In this embodiment, since the drive device 3 is fixed to the arch foot support 11, it is impossible to drag the main body 71 of the arch rib to the main beam 6 by traction. The arch foot segments 72 at both ends of the bridge arch rib 7 are suspended on the arch foot support 11. In other embodiments, the drive device 3 can also be fixed to the main beam 6, and the drive device 3 and the arch foot support 11 can be spaced apart. By adding a roller steering mechanism to connect the drive device 3 to the traction device 2, the dragging stroke can be extended while ensuring that the traction direction is tangential to the arch axis.

[0050] See also Figures 6 to 9 as well as Figure 12As shown, in some optional embodiments, the arch rib support 1 includes arch foot supports 11 at both ends and a drag zone support 12 located between the two arch foot supports 11. The traction device 2 is supported above the drag zone support 12. The construction method further includes: installing two arch foot segments 72 onto corresponding arch foot supports 11; pulling the arch rib body 71 and connecting the arch rib body 71 to the arch foot segment 72 near the end of the driving device 3; assembling the closure segment 73 at the closure joint between the arch rib body 71 and the other arch foot segment 72 to form the bridge arch rib 7. In other words, by using the drive device 3 to pull the main body 71 of the arch rib, the main body 71 of the arch rib is connected to the arch foot segment 72 set on the arch foot support 11. After the main body 71 of the arch rib is connected to the arch foot segment 72 near the drive device 3, there will be a closure opening between the main body 71 of the arch rib and another arch foot segment 72. Compared with the closure opening being located at a high position, by dragging the arch rib segment 711, the closure opening can be placed at a low position, which makes it easier for construction workers to assemble and form the closure segment 73, thus completing the construction of the bridge arch rib 7.

[0051] See also Figures 6 to 9 as well as Figure 12 As shown, in some optional embodiments, the traction device 2 includes a stranded wire 21 connected to the drive device 3 and a guide beam 22. After the arch foot segment 72 is installed on the corresponding arch foot support 11, the construction method includes: pulling the stranded wire 21 along the arch axis, so that the stranded wire 21 drags the arch rib segment 711 through the guide beam 22 until the distance between the guide beam 22 and the arch foot segment 72 near the drive device 3 is less than a first distance; removing the guide beam 22 and connecting the arch rib body 71 by the stranded wire 21. That is, in the early stage of dragging, the guide beam 22 guides the traction process to avoid the arch rib segment 711 from deflecting due to excessive cantilever length during dragging. In the later stage of dragging, the length of the arch rib body 71 formed by the connected arch rib segments 711 is long enough to prevent the center of gravity of the dragging unit from being at the cantilever. The dragging unit will not deflect during dragging, and the guide beam 22 can be disassembled so that the arch rib segment 711 can be connected to the arch foot segment 72. In this embodiment, the guide beam 22 is disassembled by gradually cutting it.

[0052] Preferably, the traction device 2 is locked before each arch rib segment 711 to be connected, and the traction device 2 is unlocked after the arch rib segment 711 to be connected is connected to the previously connected arch rib segment 711. By locking the traction device 2, the arch rib segment 711 can be prevented from shaking and making docking difficult during the connection process, thus reducing the difficulty of docking the arch rib segment 711.

[0053] The principle of the low-position closure arc-shaped arch rib construction device and construction method provided in this embodiment of the invention is as follows:

[0054] The traction device 2 is pulled by the driving device 3, which provides traction force. Since the traction device 2 is supported on the guide support device 4 located above the arch rib support 1, and the guide support device 4 is arranged at intervals along the arch axis, the traction direction of the traction device 2 can be guided. Compared with the incremental launching method, which controls the movement direction of the arch rib segment 711 by controlling the direction of thrust, this method is simpler, and the traction can achieve a greater stroke at a lower cost. Furthermore, it eliminates the need for high towers or supports, reducing construction costs.

[0055] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0056] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A construction device for a low-position closure of a circular arc arch rib, characterized in that, It includes: Arch rib support (1), the arch rib support (1) includes a plurality of guide support devices (4) arranged at intervals along the arch axis; The traction device (2) is used to traction the arch rib segment (711), and the traction device (2) is supported above the guide support device (4); The driving device (3) is connected to the traction device (2) and can pull the traction device (2) to move along the arch axis.

2. The construction device for the circular arc arch rib as described in claim 1, characterized in that: The arch rib support (1) includes arch foot supports (11) respectively located at both ends along the arch axis, and a drag zone support (12) located between the two arch foot supports (11). The traction device (2) is supported above the towing area bracket (12).

3. The construction device for the circular arc arch rib as described in claim 2, characterized in that: The traction device (2) includes a stranded wire (21) and a guide beam (22). One end of the stranded wire (21) is connected to the drive device (3), and the other end of the stranded wire (21) is connected to the guide beam (22). The drag zone bracket (12) includes a number of spaced support columns (121). The guide beam (22) is supported above at least two of the support columns (121).

4. The construction device for the circular arc arch rib as described in claim 3, characterized in that: The guide support device (4) includes an upward-opening steering groove (41) that extends in a curved direction along the arch axis and is used to receive the stranded wire (21).

5. The construction device for the circular arc arch rib as described in claim 1, characterized in that: The guide support device (4) includes a rolling element (42), the rolling shaft of the rolling element (42) is arranged horizontally and perpendicular to the arch axis, and the rolling element (42) is used to support the arch rib segment (711).

6. The construction device for the arc-shaped arch rib as described in claim 1, characterized in that: The arch rib support (1) is also equipped with a locking device.

7. A construction method for low-level closure, characterized in that, It includes the following steps: Construct the arc-shaped arch rib construction device as described in any one of claims 1-6; The arch rib segment (711) is connected to the end of the traction device (2) away from the drive device (3). The drive device (3) is used to pull the traction device (2) and the connected arch rib segment (711) along the arch axis, and the arch rib segment (711) to be connected is connected to the previous connected arch rib segment (711) in sequence, so that the arch rib segments (711) are connected end to end to form the arch rib body (71).

8. The construction method as described in claim 7, characterized in that, The arch rib support (1) includes arch foot supports (11) at both ends, and a drag zone support (12) located between the two arch foot supports (11). The traction device (2) is supported above the drag zone support (12). The construction method further includes: Install the two arch foot segments (72) onto the corresponding arch foot brackets (11) respectively. The arch rib body (71) is pulled and connected to the arch foot segment (72) near the end of the drive device (3); The closure segment (73) is assembled at the closure joint between the main body of the arch rib (71) and another arch foot segment (72) to form the bridge arch rib (7).

9. The construction method as described in claim 8, characterized in that, The traction device (2) includes a stranded wire (21) connected to the drive device (3) and a guide beam (22). After the arch foot segment (72) is installed on the corresponding arch foot support (11), the construction method includes: The strand (21) is pulled along the arch axis, so that the strand (21) drags the arch foot segment (72) through the guide beam (22) until the distance between the guide beam (22) and the arch foot segment (72) near the drive device (3) is less than the first distance; Remove the guide beam (22) and connect the arch rib body (71) with the stranded wire (21).

10. The construction method as described in claim 7, characterized in that: Before connecting each arch rib segment (711) to be connected, the traction device (2) is locked. After the arch rib segment (711) to be connected is connected to the previous arch rib segment (711), the traction device (2) is unlocked.

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