Tie bar modified anchoring structure and tied arch bridge

Abstract

The utility model discloses a tie bar transformation anchoring structure and a tied arch bridge, the tie bar transformation anchoring structure is applied to the tied arch bridge, the tied arch bridge comprises a main arch rib and side arch ribs connected to the two ends of the main arch rib, and the end of an existing tie bar is fixedly connected to the side arch ribs; the tie bar transformation anchoring structure comprises an on-arch reinforcing structure, an anchor box structure and a new tie bar, the on-arch reinforcing structure is arranged on a top plate of a side arch rib, the on-arch reinforcing structure is provided with a first tie bar channel, the anchor box structure is connected to the end, away from a main arch rib, of the side arch rib, and the anchor box structure is connected to the on-arch reinforcing structure; the anchor box structure is provided with a second tie bar channel communicated with the channel of the first tie bar, the new tie bar sequentially penetrates through the first tie bar channel and the second tie bar channel, and the end of the new tie bar is connected to the anchor box structure. Therefore, the stress tie bar of the tied-arch bridge can be replaced, the service life of the tied-arch bridge is prolonged, and the safety of the tied-arch bridge is improved. The method is widely applied to the technical field of tied-arch bridges.

Description

Technical Field

[0001] This application relates to the field of tied-arch bridge technology, and in particular to a tie-arch bridge with a modified anchoring structure. Background Technology

[0002] A tied-arch bridge is a composite structure bridge consisting of an arch, tie rods (or tie beams), suspenders, and bridge deck working in concert, characterized by the tie rods (or tie beams) bearing the horizontal thrust at the arch foot. Due to its aesthetically pleasing structure, strong span capacity, good site adaptability, and excellent economic and technical indicators, it has experienced rapid development and widespread application in my country since the 1990s. However, limited by design concepts and technological advancements, early tied-arch structures were often designed as non-replaceable permanent components. This meant the tie rods were anchored within the arch rib structure using ordinary group anchors with parallel steel strands, and grouting was applied to the anchorage section to rigidly connect the tie rods to the anchorage section, without reserving the necessary ducts and operating space for replacing the tie rods.

[0003] As the tie rod structure is one of the most important load-bearing components of a tied arch bridge, it bears most of the horizontal thrust of the main span, and its reliability plays a decisive role in the overall safety of the arch bridge. When the tie rod itself suffers serious damage or reaches its 20-year design service life, the tie rod should be replaced. However, the commonly used permanently anchored tie rod structure makes tie rod replacement very difficult. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a tie-rod modification anchoring structure and a tie-rod arch bridge, which can replace the load-bearing tie rods of the tie-rod arch bridge, extend the service life of the tie-rod arch bridge, and improve the safety of the tie-rod arch bridge.

[0005] According to a first aspect embodiment of this application, a tie rod modified anchoring structure is applied to a tie rod arch bridge, the tie rod arch bridge including a main arch rib and side arch ribs connected to both ends of the main arch rib, the ends of existing tie rods being fixedly connected to the side arch ribs, the tie rod modified anchoring structure including:

[0006] An arch-reinforcing structure is provided on the top plate of the side arch rib, and the arch-reinforcing structure is provided with a first tie rod channel;

[0007] An anchor box structure is connected to the end of the side arch rib away from the main arch rib, and the anchor box structure is connected to the arch reinforcement structure. The anchor box structure is provided with a second tie rod channel that connects to the channel of the first tie rod.

[0008] The new tie rod is sequentially inserted through the first tie rod channel and the second tie rod channel, and the end of the new tie rod is connected to the anchor box structure.

[0009] The tie rod modification anchoring structure according to the embodiments of this application has at least the following beneficial effects: by setting an arch-reinforcing structure on the top plate of the side arch rib of the tie rod arch bridge, setting an anchor box structure at the end of the side arch rib away from the main arch rib, and setting the arch-reinforcing structure to have a first tie rod channel, and the anchor box structure to have a second tie rod channel connecting the first tie rod channel, the new tie rod passes through the first tie rod channel and the second tie rod channel, and the end of the new tie rod is connected to the anchor box structure, thereby achieving a stable connection of the new tie rod. The new tie rod bears the force and force transmission of the existing tie rod, so as to unload the force of the existing tie rod, thereby realizing the replacement and modification of the load-bearing tie rod of the tie rod arch bridge, extending the service life of the tie rod arch bridge, and improving the safety of the tie rod arch bridge.

[0010] According to some embodiments of this application, the arch reinforcement structure is welded to the top plate of the side arch rib, and the anchor box structure is welded to the end of the side arch rib away from the main arch rib.

[0011] According to some embodiments of this application, the anchor box structure includes a first partition plate located inside the anchor box structure and dividing the anchor box structure into an upper box section and a lower box section. The upper box section is welded to the arch reinforcement structure, and the lower box section is welded to the side arch rib.

[0012] According to some embodiments of this application, the anchor box structure includes a pressure plate, which is disposed at one end of the anchor box structure away from the side arch rib. The pressure plate has an installation hole that communicates with the second tie rod channel. The new tie rod passes through the installation hole, and an anchor is provided at the end of the new tie rod. The new tie rod is installed on the pressure plate through the anchor.

[0013] According to some embodiments of this application, the pressure plate is disposed at the end of the lower box that is away from the side arch rib, the first partition is provided with a first positioning hole, the upper box is provided with a tie rod guide tube, the tie rod guide tube extends downward at an incline along the length direction of the tie rod arch bridge, the tie rod guide tube is a hollow tube, and the new tie rod is sequentially inserted through the tie rod guide tube, the first positioning hole and the mounting hole.

[0014] According to some embodiments of this application, the lower box section is provided with a second partition and an anchoring rib plate. The second partition is spaced apart from the bearing plate, and the anchoring rib plate is located between the second partition and the bearing plate. One end of the anchoring rib plate is connected to the second partition, and the other end of the anchoring rib plate is connected to the bearing plate. The anchoring rib plate extends downward at an incline along the length direction of the tie-rod arch bridge. The number of anchoring rib plates is at least two, and the at least two anchoring rib plates are spaced apart along the height direction of the tie-rod arch bridge so that an installation space is formed between two adjacent anchoring rib plates. The second partition is provided with a second positioning hole. The new tie rod is sequentially passed through the tie rod guide tube, the first positioning hole, the second positioning hole, the installation space, and the installation hole.

[0015] According to some embodiments of this application, the arch-reinforcing structure includes an arch-side box, the anchor box structure includes an anchor box side box, the arch-side box and the anchor box side box are correspondingly arranged, the arch-side box is located above the side box of the side arch rib, and concrete is poured into the arch-side box and the anchor box side box respectively.

[0016] According to some embodiments of this application, the number of the arch-top side boxes is two, the arch-top reinforcing structure further includes an arch-top mounting box, the two arch-top side boxes are respectively disposed on both sides of the arch-top mounting box, the first tie rod channel is disposed inside the arch-top mounting box, the number of the anchor box side boxes is two, the anchor box structure further includes an anchor box mounting box, the two anchor box side boxes are respectively disposed on both sides of the anchor box mounting box, and the second tie rod channel is partially disposed inside the anchor box mounting box.

[0017] According to some embodiments of this application, the arch-reinforcing structure further includes a plurality of arch-mounted partitions, which are spaced apart in the arch-mounted mounting box along the length of the tie-rod arch bridge. Each arch-mounted partition is provided with a third positioning hole, through which the new tie rod passes.

[0018] According to a second aspect of this application, a tied arch bridge includes a main arch rib, at least two side arch ribs, existing tie rods, and a tie rod modification anchoring structure as described in the first aspect above. The at least two side arch ribs are located at both ends of the main arch rib and connected to the main arch rib. The end of the existing tie rod is fixedly connected to the side arch rib. The arch reinforcement structure is disposed on the top plate of the side arch rib. The anchor box structure is connected to the end of the side arch rib away from the main arch rib.

[0019] The tied arch bridge according to the embodiments of this application has at least the following beneficial effects: it enables the replacement of the load-bearing tie rods of the tied arch bridge, extends the service life of the tied arch bridge, and improves the safety of the tied arch bridge.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a structural schematic diagram of the tied-arch bridge disclosed in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the anchoring structure disclosed in the embodiments of this application;

[0024] Figure 3 This is a partial cross-sectional view of the anchoring structure disclosed in the embodiments of this application from a top view perspective;

[0025] Figure 4 This is a partial cross-sectional view of the anchoring structure disclosed in the embodiments of this application in a three-dimensional state;

[0026] Figure 5 This is a schematic cross-sectional view of the anchoring structure disclosed in the embodiment of this application at the anchor box structure;

[0027] Figure 6 This is a schematic cross-sectional view of the anchoring structure disclosed in the embodiments of this application at the arch reinforcement structure.

[0028] Figure label:

[0029] 1. Tie rod modification and anchoring structure; 11. Arch reinforcement structure; 111. Arch side box; 112. Arch mounting box; 113. Arch diaphragm; 1130. Third positioning hole; 12. Anchor box structure; 121. First diaphragm; 1210. First positioning hole; 122. Upper box section; 1221. Anchor box side box; 1222. Anchor box mounting box; 123. Lower box section; 124. Bearing plate; 1240. Mounting hole; 125. Tie rod guide tube; 126. Second diaphragm; 1260. Second positioning hole; 127. Anchor reinforcement plate; 1270. Installation space; 13. New tie rod; 131. Anchor; 14. Inspection manhole;

[0030] 2. Tied arch bridge; 21. Main arch rib; 22. Side arch rib; 23. Existing tie rod. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0033] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In the description of this application, the use of terms such as "as one implementation," "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] This application discloses a tie rod modification and anchoring structure, which can be applied to tie rod arch bridges to facilitate the replacement of the load-bearing tie rods in tie rod arch bridges.

[0037] To facilitate understanding of the tie-rod modification anchorage structure and the structure of the tie-rod arch bridge, the following description, in conjunction with embodiments and accompanying drawings, will further illustrate the tie-rod modification anchorage structure and the tie-rod arch bridge. It should be noted that the following description is merely illustrative and not intended to limit the scope of this application.

[0038] Please refer to the following: Figures 1 to 6 This application provides a tied arch bridge 2, including a main arch rib 21, at least two side arch ribs 22, and existing tie rods 23 (see...). Figure 6 The system includes a tie rod modification anchoring structure 1, at least two side arch ribs 22 located at both ends of the main arch rib 21 and connected to the main arch rib 21, the end of the existing tie rod 23 fixedly connected to the side arch rib 22, and the tie rod modification anchoring structure 1 connected to the side arch rib 22. Specifically, the tie rod modification anchoring structure 1 includes an arch-top reinforcement structure 11, an anchor box structure 12, and a new tie rod 13. The arch-top reinforcement structure 11 is set on the top plate of the side arch rib 22 and has a first tie rod channel. The anchor box structure 12 is connected to the end of the side arch rib 22 away from the main arch rib 21 and is connected to the arch-top reinforcement structure 11. The anchor box structure 12 has a second tie rod channel that connects to the first tie rod. The new tie rod 13 passes through the first tie rod channel and the second tie rod channel in sequence, and the end of the new tie rod 13 is connected to the anchor box structure 12.

[0039] The tie rod modification anchoring structure 1 and tie rod arch bridge 2 provided in this application embodiment are achieved by setting an arch reinforcement structure 11 on the top plate of the side arch rib 22 of the tie rod arch bridge 2, setting an anchor box structure 12 at the end of the side arch rib 22 away from the main arch rib 21, and setting the arch reinforcement structure 11 to have a first tie rod channel, and the anchor box structure 12 to have a second tie rod channel connecting the first tie rod channel. The new tie rod 13 passes through the first tie rod channel and the second tie rod channel, and the end of the new tie rod 13 is connected to the anchor box structure 12, thereby achieving a stable connection of the new tie rod 13. The new tie rod 13 bears the force and force transmission of the existing tie rod 23, so as to unload the force of the existing tie rod 23, thereby realizing the replacement and modification of the load tie rod of the tie rod arch bridge 2, so as to extend the service life of the tie rod arch bridge 2 and improve the safety of the tie rod arch bridge 2.

[0040] It should be noted that the new tie rod 13 mentioned in the embodiments of this application refers to a tie rod added compared to the existing tie rod 23. Its purpose is to replace the existing tie rod 23 in bearing the tension load, so as to facilitate the subsequent unloading of the force on the existing tie rod 23. This way, the existing tie rod 23, which has defects or has reached the end of its service life, will no longer serve as the supporting force transmission structure of the tie rod arch bridge 2, thereby extending the service life of the tie rod arch bridge 2 and improving the safety of the tie rod arch bridge 2.

[0041] In some embodiments, the arch reinforcement structure 11 is welded to the top plate of the side arch rib 22, and the anchor box structure 12 is welded to the end of the side arch rib 22 away from the main arch rib 21. This allows the existing side arch rib 22 of the tied arch bridge 2 to provide stable support for the tie-rod modified anchoring structure 1, and improves the connection stability between the tie-rod modified anchoring structure 1 and the side arch rib 22, thereby enhancing the structural reliability of the tied arch bridge 2.

[0042] Understandably, in other embodiments, the top plate of the arch reinforcement structure 11 and the side arch rib 22 can also be connected by anchoring or threaded locking, and the anchor box structure 12 and the side arch rib 22 can also be connected by anchoring or threaded locking.

[0043] Optionally, the anchor box structure 12 includes a first partition 121, which is located inside the anchor box structure 12 and divides the anchor box structure 12 into an upper box portion 122 and a lower box portion 123. The upper box portion 122 is welded to the arch reinforcement structure 11, and the lower box portion 123 is welded to the side arch rib 22.

[0044] In this way, the anchor box structure 12 adopts a single-box, double-cell structure with upper and lower sections. The upper box 122 and lower box 123 of the anchor box structure 12 are respectively connected to the arch reinforcement structure 11 and the side arch rib 22. This allows the new tie rod 13 to have two force transmission paths under tension load, including: new tie rod 13 tensioning → anchor box structure 12 → side arch rib 22, and new tie rod 13 tensioning → anchor box structure 12 → arch reinforcement structure → side arch rib 22. This ensures that the tension load on the new tie rod 13 can be transferred to the side arch rib 22, thus ensuring the force transmission effect of the new tie rod 13 and improving the overall structural reliability of the tie-arch bridge 2.

[0045] Optionally, the first partition plate 121 is aligned with the top plate of the side arch rib 22, so that the lower box part 123 of the anchor box structure 12 corresponds to the side arch rib 22, and the upper box part 122 corresponds to the upper arch reinforcing structure 11. That is, the upper box part 122 and the lower box part 123 of the anchor box structure 12 are welded with different structures, which is beneficial to increase the welding area between the anchor box structure 12 and the side arch rib 22 and the upper arch reinforcing structure 11, and improve the connection reliability of the tie rod modified anchoring structure 1.

[0046] Optionally, the arch-reinforcing structure 11 includes an arch-side box 111, and the upper box portion 122 of the anchor box structure 12 includes an anchor box side box 1221. The arch-side box 111 and the anchor box side box 1221 are correspondingly arranged, with the arch-side box 111 located above the side box of the side arch rib 22. Concrete is poured into both the arch-side box 111 and the anchor box side box 1221. This allows the concrete-filled arch-side box 111 and anchor box side box 1221 to transmit forces to the side arch rib 22, which helps to transfer the tension load on the new tie rod 13 to the existing side arch rib 22 of the tied arch bridge 2, thereby improving the structural reliability of the tied arch bridge 2.

[0047] Optionally, the walls of the arch-top side box 111 and the anchor box side box 1221 are formed by steel plates. The inner wall of the steel plate is provided with shear studs that extend into the concrete, thereby connecting the concrete and the steel plate through the shear studs. This allows the concrete to be better integrated with the box wall, which is beneficial to improving the structural stability of the arch-top side box 111 and the anchor box side box 1221.

[0048] Optionally, there are two arch-top side boxes 111, and the arch-top reinforcing structure 11 also includes an arch-top mounting box 112. The two arch-top side boxes 111 are respectively arranged on both sides of the arch-top mounting box 112. The first tie rod channel is arranged inside the arch-top mounting box 112. There are two anchor box side boxes 1221, and the anchor box structure 12 also includes an anchor box mounting box 1222. The two anchor box side boxes 1221 are respectively arranged on both sides of the anchor box mounting box 1222. The first partition 121 is arranged inside the anchor box mounting box 1222, and the second tie rod channel is partially arranged inside the anchor box mounting box 1222.

[0049] In this way, the new tie rod 13 is sequentially installed in the arch mounting box 112 and the anchor box mounting box 1222, which facilitates the disassembly, assembly, tensioning and adjustment of the new tie rod 13, and makes it easier to maintain the new tie rod 13. When the new tie rod 13 reaches its service life or develops defects, the first tie rod channel, the second tie rod channel and the tensioning allowable value space of the new tie rod 13 can be used to repeatedly replace the new tie rod 13, so as to greatly extend the service life of the tie-arch bridge 2 and ensure the safety of the tie-arch bridge 2.

[0050] In some embodiments, the anchor box structure 12 includes a pressure plate 124, which is disposed at one end of the anchor box structure 12 away from the side arch rib 22. The pressure plate 124 has a mounting hole 1240, which connects to the second tie rod channel. A new tie rod 13 passes through the mounting hole 1240, and an anchor 131 is provided at the end of the new tie rod 13. The new tie rod 13 is installed on the pressure plate 124 through the anchor 131.

[0051] In this way, the new tie rod 13 is securely installed on the bearing plate 124 via the anchor 131, and supported by the anchor box structure 12. Simultaneously, the tension load is transferred to the side arch ribs 22 via the anchor box structure 12 or the arch reinforcement structure 11, ensuring the structural stability and reliability of the tied arch bridge 2. The tension load of the new tie rod 13 can be adjusted by adjusting the anchor 131, facilitating its disassembly and installation.

[0052] Optionally, the anchor 131 can be an anchor head or a plug, etc.

[0053] Optionally, the bearing plate 124 is located at the end of the lower box section 123 away from the side arch rib 22. The first partition plate 121 is provided with a first positioning hole 1210. The upper box section 122 is provided with a tie rod guide tube 125, which extends downward at an incline along the length of the tie rod arch bridge 2. The tie rod guide tube 125 is a hollow tube. The new tie rod 13 is sequentially inserted through the tie rod guide tube 125, the first positioning hole 1210, and the mounting hole 1240. This allows the tie rod guide tube 125 to guide the new tie rod 13, enabling it to bend or tilt appropriately to adapt to the structural layout of the tie rod modified anchoring structure 1. This facilitates the transfer of the tensile load borne by the new tie rod 13 to the side arch rib 22 and ensures that the tensile load of the new tie rod 13 has two transmission paths, improving the structural reliability of the tie rod arch bridge 2. On the other hand, the tie rod guide tube 125 also supports the new tie rod 13, facilitating the force transmission of the new tie rod 13.

[0054] Optionally, the lower box portion 123 is provided with a second partition 126 and an anchoring rib 127. The second partition 126 is spaced apart from the bearing plate 124. The anchoring rib 127 is located between the second partition 126 and the bearing plate 124. One end of the anchoring rib 127 is connected to the second partition 126, and the other end of the anchoring rib 127 is connected to the bearing plate 124. The anchoring rib 127 extends downward at an incline along the length direction of the tie-rod arch bridge 2. There are at least two anchoring ribs 127. The at least two anchoring ribs 127 are spaced apart along the height direction of the tie-rod arch bridge 2 so that an installation space 1270 is formed between two adjacent anchoring ribs 127. The second partition 126 is provided with a second positioning hole 1260. The new tie rod 13 is sequentially passed through the tie rod guide tube 125, the first positioning hole 1210, the second positioning hole 1260, the installation space 1270, and the installation hole 1240.

[0055] In this way, by setting the second partition 126 and the anchoring rib plate 127, the new tie rod 13 can be supported and guided. The second tie rod channel is composed of tie rod guide tube 125, first positioning hole 1210, second positioning hole 1260 and installation space 1270. The tie rod guide tube 125, first partition 121, second partition 126, anchoring rib plate 127 and bearing plate 124 support the new tie rod 13, which can make the new tie rod 13 more stable in the anchor box structure 12, thereby improving the structural stability of the tie rod arch bridge 2 and facilitating the installation and force transmission of the new tie rod 13.

[0056] It should be noted that the installation path of the new tie rod 13 needs to be adjusted according to the actual situation. For example, in some embodiments, when the outlet of the tie rod guide 125 extends to the first positioning hole 1210, the new tie rod 13 is sequentially inserted through the first tie rod channel, tie rod guide 125, first positioning hole 1210, second positioning hole 1260, installation space 1270, and installation hole 1240; when there is a certain distance between the outlet of the tie rod guide 125 and the first positioning hole 1210, the new tie rod 13 is installed through the first positioning hole 1260. A second partition 126 is provided between the tie rod 10 and the tie rod guide 125. The new tie rod 13 is sequentially inserted through the first tie rod channel, the tie rod guide 125, the second positioning hole 1260, the first positioning hole 1210, the second positioning hole 1260, the mounting space 1270, and the mounting hole 1240. When the tie rod guide 125 passes through the first partition 121, the new tie rod 13 is sequentially inserted through the first tie rod channel, the tie rod guide 125, the second positioning hole 1260, the mounting space 1270, and the mounting hole 1240 (see...). Figure 4 ).

[0057] Optionally, the arch reinforcement structure 11 also includes multiple arch partitions 113, which are spaced apart in the arch mounting box 112 along the length of the tie rod arch bridge 2. The arch partitions 113 are provided with a third positioning hole 1130, and the new tie rod 13 passes through the third positioning hole 1130.

[0058] In this way, the third positioning holes 1130 of the multiple arch diaphragms 113 can form a first tie rod channel. The new tie rod 13 is supported and guided by the arch diaphragms 113, which helps to make the new tie rod 13 more stable within the anchor box structure 12, thereby improving the structural stability of the tie rod arch bridge 2 and facilitating the installation and force transmission of the new tie rod 13. For example, the new tie rod 13 is sequentially inserted through the third positioning hole 1130, the tie rod guide tube 125, the second positioning hole 1260, the installation space 1270, and the installation hole 1240.

[0059] In some embodiments, the second partition 126 extends upward from the lower box 123 to the top plate of the upper box 122, the tie rod guide 125 is located in the upper box 122 and passes through the second partition 126, and the upper partition 113 and the second partition 126 are respectively provided with maintenance manholes 14 to facilitate operators to inspect and maintain the anchoring structure.

[0060] It should be noted that in some embodiments, the maintenance manhole 14 of the upper diaphragm 113 can also serve as a support and guide structure for the new tie rod 13. That is, the first tie rod channel can also be composed of the maintenance manhole 14. For example, the new tie rod 13 is sequentially passed through the maintenance manhole 14, tie rod guide 125, second positioning hole 1260, installation space 1270 and installation hole 1240 of the upper diaphragm 113 (see...). Figure 4 ).

[0061] In some embodiments, there are multiple new tie rods 13. For example, in the tie rod modification anchoring structure 1, there are four new tie rods 13. Correspondingly, there are four first tie rod channels and four second tie rod channels. The four new tie rods 13 are arranged at intervals along the height and width directions of the tie rod arch bridge 2. This improves the structural reliability of the tie rod arch bridge 2, reduces the load that a single new tie rod 13 needs to bear, helps ensure the force transmission performance and structural reliability of the new tie rod 13, and allows each new tie rod 13 to have its own tie rod channel, which is beneficial for the stable installation of the new tie rod 13 and for the disassembly and maintenance of the single new tie rod 13.

[0062] Optionally, as mentioned above, there are at least two side arch ribs 22. Based on this, there are multiple tie rod modified anchoring structures 1, with each tie rod modified anchoring structure 1 corresponding to at least two side arch ribs 22. For example, the number of side arch ribs 22 and tie rod modified structures can be four, the number of main arch ribs 21 is two, and the four tie rod modified anchoring structures 1 correspond to the four side arch ribs 22. This ensures the structural reliability of the tie-arch bridge 2.

[0063] It should be noted that multiple new tie rods 13 need to be installed one by one during installation. The new tie rods 13 are installed by a phased symmetrical tensioning method, while unloading the internal force of the existing tie rods 23 to complete the installation of a single new tie rod 13.

[0064] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A tie rod modification anchoring structure, characterized in that, This method is applied to tied-arch bridges, which include a main arch rib and side arch ribs connected to both ends of the main arch rib. The ends of existing tie rods are fixedly connected to the side arch ribs. The modified tie rod anchoring structure includes: An arch-reinforcing structure is provided on the top plate of the side arch rib, and the arch-reinforcing structure is provided with a first tie rod channel; An anchor box structure is connected to the end of the side arch rib away from the main arch rib, and the anchor box structure is connected to the arch reinforcement structure. The anchor box structure is provided with a second tie rod channel that connects to the channel of the first tie rod. The new tie rod is sequentially inserted through the first tie rod channel and the second tie rod channel, and the end of the new tie rod is connected to the anchor box structure.

2. The tie rod modification anchoring structure according to claim 1, characterized in that, The arch reinforcement structure is welded to the top plate of the side arch rib, and the anchor box structure is welded to the end of the side arch rib away from the main arch rib.

3. The tie rod modification anchoring structure according to claim 1 or 2, characterized in that, The anchor box structure includes a first partition plate, which is located inside the anchor box structure and divides the anchor box structure into an upper box section and a lower box section. The upper box section is welded to the arch reinforcement structure, and the lower box section is welded to the side arch rib.

4. The tie rod modification anchoring structure according to claim 3, characterized in that, The anchor box structure includes a pressure plate, which is located at the end of the anchor box structure away from the side arch rib. The pressure plate has an installation hole that connects to the second tie rod channel. The new tie rod passes through the installation hole, and the end of the new tie rod is provided with an anchor. The new tie rod is installed on the pressure plate through the anchor.

5. The tie rod modified anchoring structure according to claim 4, characterized in that, The pressure plate is located at the end of the lower box that is away from the side arch rib. The first partition is provided with a first positioning hole. The upper box is provided with a tie rod guide tube. The tie rod guide tube extends downward at an incline along the length of the tie rod arch bridge. The tie rod guide tube is a hollow tube. The new tie rod is sequentially inserted through the tie rod guide tube, the first positioning hole, and the mounting hole.

6. The tie rod modification anchoring structure according to claim 5, characterized in that, The lower box section is provided with a second partition and an anchoring rib. The second partition is spaced apart from the bearing plate. The anchoring rib is located between the second partition and the bearing plate. One end of the anchoring rib is connected to the second partition, and the other end is connected to the bearing plate. The anchoring rib extends downward at an incline along the length of the tied arch bridge. There are at least two anchoring ribs, which are spaced apart along the height of the tied arch bridge to form an installation space between adjacent anchoring ribs. The second partition is provided with a second positioning hole. The new tie rod is sequentially inserted through the tie rod guide tube, the first positioning hole, the second positioning hole, the installation space, and the installation hole.

7. The tie rod modification anchoring structure according to claim 1, characterized in that, The arch-reinforcing structure includes an arch-side box, and the anchor box structure includes an anchor box side box. The arch-side box and the anchor box side box are correspondingly arranged. The arch-side box is located above the side box of the side arch rib. Concrete is poured into the arch-side box and the anchor box side box respectively.

8. The tie rod modification anchoring structure according to claim 7, characterized in that, The number of the arch-top side boxes is two, and the arch-top reinforcing structure also includes an arch-top mounting box. The two arch-top side boxes are respectively arranged on both sides of the arch-top mounting box. The first tie rod channel is arranged inside the arch-top mounting box. The number of the anchor box side boxes is two, and the anchor box structure also includes an anchor box mounting box. The two anchor box side boxes are respectively arranged on both sides of the anchor box mounting box. The second tie rod channel is partially arranged inside the anchor box mounting box.

9. The tie rod modification anchoring structure according to claim 8, characterized in that, The arch reinforcement structure also includes multiple arch partitions, which are spaced apart in the arch mounting box along the length of the tie rod arch bridge. Each arch partition has a third positioning hole through it, and the new tie rod passes through the third positioning hole.

10. A tied-arch bridge, characterized in that, The structure includes a main arch rib, at least two side arch ribs, an existing tie rod, and a tie rod modification anchoring structure as described in any one of claims 1-9. The at least two side arch ribs are located at both ends of the main arch rib and connected to the main arch rib. The end of the existing tie rod is fixedly connected to the side arch rib. The arch reinforcement structure is disposed on the top plate of the side arch rib. The anchor box structure is connected to the end of the side arch rib away from the main arch rib.

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