Arch bridge arch structure

Abstract

This utility model relates to the field of bridge engineering technology, and in particular to an arch bridge arch ring structure. The arch ring structure includes an arch base and an arch ring assembly. The arch base is located on the mountainside on both sides of a valley. Both ends of the arch ring assembly are fixed to the arch base. The arch ring assembly includes multiple prefabricated arch ring units and a post-cast structural layer. The multiple prefabricated arch ring units are arranged along the longitudinal and transverse directions of the bridge. The prefabricated arch ring units along the longitudinal direction form an arch ring, while the prefabricated arch ring units along the transverse direction are oriented opposite each other and connected in rows. The post-cast structural layer is disposed between the prefabricated arch ring units to connect the arch ring assembly into a single unit. This utility model eliminates the need for temporary facilities such as full-span scaffolding and inclined cable ties required in conventional arch bridges. The prefabricated structure of the arch ring eliminates the need for additional formwork construction and removal, simplifying the construction process of the arch bridge arch ring and significantly shortening the construction period.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to an arch ring structure for an arch bridge. Background Technology

[0002] With the increasing demand for tourism, pedestrian bridges and cable cars are common crossing methods when traversing valleys and rivers in natural scenic areas due to pedestrian transportation needs. Because cable cars have limited capacity and are suitable for a limited number of people, pedestrian bridges remain the preferred option when the budget is relatively sufficient. Arch bridges have a long history of application, and due to their beautiful shapes, they still have good application prospects, especially in the field of pedestrian bridges where aesthetic and design requirements are high, even with the maturity of various modern bridge structure technologies.

[0003] Currently, there are three main conventional methods for constructing arch bridges:

[0004] One approach is to erect a full-span scaffolding structure before performing in-situ casting. However, this method is poorly applicable in situations where large-scale scaffolding is not feasible under the bridge, such as deep canyons or navigable waterways, greatly limiting the application scenarios for arch bridges.

[0005] The second method is the inclined cable-stayed method, which involves casting the arch section by section and erecting a temporary steel tower above the arch base. The arch is then hung on the steel tower by inclined cables. This method requires the construction of a complex steel tower and large anchor blocks, resulting in a large amount of temporary construction work, a long structural construction period, and a significant environmental impact.

[0006] The third method is the steel-concrete composite rigid frame method. This method involves first closing the steel-concrete composite arch, then erecting formwork and pouring concrete on top of the arch to form the concrete arch ring. This method has a complex construction process and a long construction period, and is only suitable for ultra-large span concrete arch bridges.

[0007] Therefore, it is necessary to propose an arch ring structure for arch bridges to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0008] The main purpose of this utility model is to provide an arch ring structure for arch bridges to solve the technical problems of complex construction process and long construction period of arch bridges in the prior art.

[0009] To achieve the above objectives, this utility model provides an arch bridge arch ring structure, including an arch base and an arch ring assembly. The arch base is set on the mountainside on both sides of a valley. The two ends of the arch ring assembly are respectively fixed to the corresponding arch base. The arch ring assembly includes multiple prefabricated arch ring units and a post-cast structural layer. The multiple prefabricated arch ring units are connected to each other in a row along the transverse direction of the bridge. The post-cast structural layer is cast between two adjacent prefabricated arch ring units so that the arch ring assembly is connected as a whole.

[0010] Furthermore, the arch assembly includes multiple intermediate precast arch units, a first side precast arch unit, and a second side precast arch unit. The intermediate precast arch units are connected side-by-side along the transverse bridge direction. The first side precast arch unit and the second side precast arch unit are located on both sides of the intermediate precast arch unit, respectively. The first side precast arch unit, the second side precast arch unit, and the intermediate precast arch unit are connected side-by-side along the transverse bridge direction.

[0011] Furthermore, the post-cast structural layer is formed by concrete pouring, and the post-cast structural layer includes a first post-cast structural layer, a second post-cast structural layer, and a third post-cast structural layer. A first concrete pouring space is formed between the intermediate precast arch unit and the first edge precast arch unit, a second concrete pouring space is formed between the intermediate precast arch unit and the second edge precast arch unit, and a third concrete pouring space is formed between two adjacent intermediate precast arch units. The first post-cast structural layer is disposed in the first concrete pouring space, the second post-cast structural layer is disposed in the second concrete pouring space, and the third post-cast structural layer is disposed in the third concrete pouring space.

[0012] More preferably, the first edge prefabricated arch unit includes a first base plate, a first web plate, and a first transverse diaphragm plate, wherein the first web plate is connected to the top of the first base plate, the bottom surface of the first transverse diaphragm plate is connected to the top surface of the first base plate, and the side surface of the first transverse diaphragm plate is connected to the side wall of the first web plate.

[0013] The second prefabricated arch unit includes a second base plate, a second web plate, and a second transverse diaphragm plate, wherein the second web plate is connected to the top of the second base plate, the bottom surface of the second transverse diaphragm plate is connected to the top surface of the second base plate, and the side surface of the second transverse diaphragm plate is connected to the side wall of the second web plate.

[0014] Each of the intermediate precast arch units includes a third base plate, a third web plate, and two third and fourth transverse diaphragms respectively connected to the two sides of the third web plate. The bottom surfaces of the third and fourth transverse diaphragms are connected to the top surface of the third base plate.

[0015] The first post-cast structural layer is disposed between the first web and the third web, the second post-cast structural layer is disposed between the second web and the third web, and the third post-cast structural layer is disposed between two adjacent third webs.

[0016] More preferably, it also includes a plurality of flow holes for concrete to pass through, the plurality of flow holes being respectively disposed on the first transverse diaphragm, the second transverse diaphragm, the third transverse diaphragm and / or the fourth transverse diaphragm.

[0017] More preferably, the middle portions of the first web, the second web, and the third web are recessed inward to form a groove, and the two sides of the first post-cast structural layer, the second post-cast structural layer, and the third post-cast structural layer are accommodated in the groove.

[0018] More preferably, it also includes a first shear keyway and a second shear keyway, the first shear keyway being disposed on the side wall of the first base plate near the adjacent third base plate, and the second shear keyway being disposed on the side wall of the third base plate near the adjacent second base plate;

[0019] It also includes a first shear key and a second shear key, wherein the first shear key is disposed on the side wall of the second base plate near the adjacent third base plate, and the second shear key is disposed on the side wall of the third base plate near the adjacent first base plate;

[0020] The first shear key tooth and the second shear keyway are arranged in a one-to-one correspondence, the second shear key tooth and the first shear keyway are arranged in a one-to-one correspondence, the second shear key tooth is inserted into the corresponding first shear keyway, and the first shear key tooth is inserted into the corresponding second shear keyway.

[0021] More preferably, it also includes structural adhesive, which is applied to the first shear keyway and the second shear keyway.

[0022] Preferably, the arch seat further includes a toothed ledge, the stepped surface of which faces into the mountain body, and the extension direction of the toothed ledge is perpendicular to the force direction of the arch seat.

[0023] Preferably, the system further includes temporary tie rods, which are arranged along the transverse direction of the bridge. The first and second precast arch units on the sides are respectively provided with anchor blocks, and the two ends of the temporary tie rods are connected to the first and second precast arch units on the sides through the anchor blocks.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The precast arch ring unit of this invention can be prefabricated in the factory in advance. On the construction site, the precast arch ring unit only needs to be assembled. After assembly, a concrete pouring space is formed inside the precast arch ring unit. A post-cast structural layer is set in the concrete pouring space to connect the precast arch ring units into one piece, thus completing the construction of the arch ring component. This invention eliminates the need for temporary facilities such as full-span scaffolding and inclined tie rods required in conventional arch bridges. It also eliminates the need for additional formwork construction and dismantling, simplifying the construction process of the arch ring of the arch bridge and significantly shortening the construction cycle. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic cross-sectional view of the arch assembly in one embodiment of this application before assembly;

[0028] Figure 2 This is a schematic cross-sectional view of the arch ring assembly at the arch top cable saddle in one embodiment of this application;

[0029] Figure 3 This is a schematic cross-sectional view of the arch assembly at the location corresponding to the arch seat in one embodiment of this application;

[0030] Figure 4 This is a cross-sectional schematic diagram of the arch assembly in one embodiment of the present application, which is fixed by temporary tie rods before the pouring of shrinkage-compensating concrete.

[0031] Figure 5 This is a schematic cross-sectional view of the arch assembly in one embodiment of this application after the shrinkage-compensating concrete has been poured.

[0032] Figure 6 This is a plan view of the third U-shaped embedded steel bar, the fourth U-shaped embedded steel bar, and the third steel mesh in one embodiment of this application;

[0033] Figure 7 This is a cross-sectional schematic diagram of the arch ring structure of the arch bridge in one embodiment of this application applied to a pedestrian catenary arch bridge.

[0034] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] Explanation of icon numbers:

[0036] 220. Arch assembly; 221. Intermediate precast arch unit; 2211. Third base plate; 2212. Second shear key; 2213. Second shear keyway; 2214. Third web; 2215. Third diaphragm; 2216. Fourth diaphragm; 2217. Third U-shaped embedded steel bar; 2218. Fourth U-shaped embedded steel bar; 2219. Third steel mesh; 2220. Fifth positioning key; 222. First edge precast arch unit; 2221. First base plate; 2222. First shear keyway; 2223. First web; 2224. First diaphragm; 2225. First U-shaped embedded steel bar 2226. Reinforcing bar; 223. Third positioning key; 223. Second side precast arch unit; 2231. Second base plate; 2232. First shear key; 2233. Second web; 2234. Second transverse diaphragm; 2235. Second U-shaped embedded reinforcing bar; 2236. Fourth positioning key; 224. First concrete pouring space; 2241. First post-cast structural layer; 225. Second concrete pouring space; 2251. Second post-cast structural layer; 226. Third concrete pouring space; 2261. Third post-cast structural layer; 227. Temporary tie rod; 228. Anchor block; 230. Arch seat; 231. Pit. Detailed Implementation

[0037] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0041] Please see Figures 1 to 7 This embodiment provides an arch bridge arch ring structure, including an arch base 230 and an arch ring assembly 220. The arch base 230 is disposed on the mountainside on both sides of a valley. The two ends of the arch ring assembly 220 are fixed to the arch base 230. The arch ring assembly 220 includes multiple precast arch ring units and a post-cast structural layer. The multiple precast arch ring units are arranged along the longitudinal and transverse directions of the bridge, respectively. The precast arch ring units in the longitudinal direction are arranged to form an arch ring. The precast arch ring units in the transverse direction are oriented opposite to each other and connected in rows. The post-cast structural layer is disposed between the precast arch ring units so that the arch ring assembly 220 is connected as a whole.

[0042] In this embodiment, the prefabricated arch unit in the longitudinal direction of the bridge can be prefabricated as a whole or it can be spliced ​​together from multiple prefabricated arch units.

[0043] In this embodiment, the prefabricated arch ring units can be prefabricated in the factory in advance. On the construction site, the prefabricated arch ring units only need to be assembled. After assembly, a concrete pouring space is formed inside the prefabricated arch ring units. A post-cast structural layer is set in the concrete pouring space to connect the prefabricated arch ring units into one piece, thus completing the construction of the arch ring component 220. This eliminates the need for temporary facilities such as full-span scaffolding and inclined tie rods required in conventional arch bridges. There is no need to build or dismantle additional formwork, which simplifies the construction process of the arch ring of the arch bridge and can significantly shorten the construction cycle.

[0044] In a preferred embodiment, the arch assembly 220 includes a plurality of intermediate precast arch units 221 connected side by side along the transverse direction of the bridge, and two first side precast arch units 222 and second side precast arch units 223 located on both sides of the intermediate precast arch units 221 respectively. The first side precast arch units 222, the second side precast arch units 223 and the intermediate precast arch units 221 are connected side by side along the transverse direction of the bridge. The arch tops of the first side precast arch units 222, the second side precast arch units 223 and the intermediate precast arch units 221 are all fixed with cable saddles, which facilitate the connection with the cables of the catenary arch bridge.

[0045] Specifically, a first concrete pouring space 224 is formed between the intermediate precast arch unit 221 and the first side precast arch unit 222, a second concrete pouring space 225 is formed between the intermediate precast arch unit 221 and the second side precast arch unit 223, and a third concrete pouring space 226 is formed between two adjacent intermediate precast arch units 221. Shrinkage-compensating concrete is poured in the first concrete pouring space 224 to form a first post-cast structural layer 2241, shrinkage-compensating concrete is poured in the second concrete pouring space 225 to form a second post-cast structural layer 2251, and shrinkage-compensating concrete is poured in the third concrete pouring space 226 to form a third post-cast structural layer 2261.

[0046] Specifically, the arch assembly 220 in this embodiment includes a central precast arch unit 221, a first side precast arch unit 222, and a second side precast arch unit 223 connected side-by-side along the transverse direction of the bridge, forming a symmetrical layout of the middle and both sides. The cable saddle can convert part of the bridge deck load into pressure on the arch assembly 220, achieving multi-point stress distribution. The first concrete pouring space 224, the second concrete pouring space 225, and the third concrete pouring space 226 are filled with shrinkage-compensating concrete to form a first post-cast structural layer 2241, a second post-cast structural layer 2251, and a third post-cast structural layer 2261, which are integrated with the arch assembly 220 as a whole, improving the transverse bending stiffness of the bridge and effectively resisting the torsional effect caused by eccentric loading. The arch assembly 220 converts the bridge deck load into axial pressure, which is transmitted to the foundation through the arch seat 230. The post-cast layers ensure continuous pressure distribution and avoid stress concentration.

[0047] Furthermore, in this embodiment, the intermediate precast arch unit 221, the first side precast arch unit 222, and the second side precast arch unit 223 all adopt precast UHPC stiffened body structures, forming a concrete pouring space after assembly, eliminating the need for additional hoisting formwork and subsequent dismantling. The post-cast shrinkage-compensating concrete is significantly offset from the top and bottom plates of the longitudinal joints of the precast UHPC stiffened body structure, avoiding the risk of the joints penetrating through and affecting durability. The arch component 220 is precast in sections in the transverse direction, with a wall thickness relatively large compared to the steel structure and relatively thin compared to the concrete structure, avoiding the problem of local instability in thin-walled steel structures and significantly reducing the structural load. The post-cast shrinkage-compensating concrete only bears the secondary dead load and live load; the load generated by its own weight is entirely transferred to the precast UHPC stiffened body structure before the concrete initially sets, improving the structural bearing capacity. Precast UHPC stiffened structures bear their own weight and the self-weight of cast-in-place concrete. Compared with ordinary concrete, they bear a greater load per unit area, fully demonstrating the ultra-high performance of precast UHPC stiffened structures.

[0048] In other embodiments, the number of intermediate precast arch units 221 may be one, and the number of intermediate precast arch units 221 may be adjusted according to the width of the bridge.

[0049] In a preferred embodiment, the first edge prefabricated arch unit 222 includes a first base plate 2221, a first web plate 2223, and a first transverse diaphragm 2224. The first web plate 2223 is connected to the top of the first base plate 2221, the bottom surface of the first transverse diaphragm 2224 is connected to the top surface of the first base plate 2221, and the side surface of the first transverse diaphragm 2224 is connected to the side wall of the first web plate 2223.

[0050] The second prefabricated arch unit 223 includes a second base plate 2231, a second web plate 2233, and a second transverse diaphragm 2234. The second web plate 2233 is connected to the top of the second base plate 2231, the bottom surface of the second transverse diaphragm 2234 is connected to the top surface of the second base plate 2231, and the side surface of the second transverse diaphragm 2234 is connected to the side wall of the second web plate 2233.

[0051] Each of the intermediate precast arch units 221 includes a third base plate 2211, a third web plate 2214, and two third transverse diaphragms 2215 and a fourth transverse diaphragm 2216 respectively connected to both sides of the third web plate 2214. The bottom surfaces of the third transverse diaphragm 2215 and the fourth transverse diaphragm 2216 are connected to the top surface of the third base plate 2211.

[0052] The first post-cast structural layer 2241 is cast between the first web 2223 and the third web 2214, the second post-cast structural layer 2251 is cast between the second web 2233 and the third web 2214, and the third post-cast structural layer 2261 is cast between two adjacent third webs 2214.

[0053] Specifically, it also includes multiple flow holes for concrete to pass through, which are respectively disposed on the first transverse diaphragm 2224, the second transverse diaphragm 2234, the third transverse diaphragm 2215 and / or the fourth transverse diaphragm 2216. Concrete can flow through the flow holes and, after solidification, is trapped within the flow holes to form a post-cast structural layer, improving the integrity of the post-cast structural layer and the precast arch unit, thereby increasing the strength of the post-cast structural layer.

[0054] Specifically, the middle portions of the first web 2223, the second web 2233, and the third web 2214 are recessed inward to form a groove, and the sides of the first post-cast structural layer 2241, the second post-cast structural layer 2251, and the third post-cast structural layer 2261 are accommodated within the groove. The edges of the post-cast structural layers are engaged within the groove, further improving the integrity of the post-cast structural layers and the precast arch unit.

[0055] Specifically, in this embodiment, the intermediate precast arch unit 221, the first side precast arch unit 222, and the second side precast arch unit 223 all adopt precast structures (bottom plate + web plate + diaphragm). After standardized production in the factory, they are transported to the site and connected by post-cast structural layers. The first post-cast structural layer 2241, the second post-cast structural layer 2251, and the third post-cast structural layer 2261 serve as concrete connectors cast on site, bonding the precast units into a whole to form a continuous load-bearing system. Preferably, the diaphragm adopts a hollow diaphragm, which effectively avoids the problem of insufficient compaction of the post-cast shrinkage compensating concrete. At the same time, the hollow diaphragm reduces the local span of the thin-walled bottom plate and strengthens the bottom plate and web plate.

[0056] Furthermore, the first base plate 2221 has a first shear keyway 2222 recessed on the side wall near the adjacent third base plate 2211, the second base plate 2231 has a first shear key tooth 2232 protruding on the side wall near the adjacent third base plate 2211, the side wall of the third base plate 2211 adjacent to the first base plate 2221 has a second shear key tooth 2212 protruding and arranged in a one-to-one correspondence with the first shear keyway 2222, and the side wall of the third base plate 2211 adjacent to the second base plate 2231 has a second shear keyway 2213 recessed and arranged in a one-to-one correspondence with the first shear key tooth 2232. The second shear key tooth 2212 is inserted into the corresponding first shear keyway 2222, and the first shear key tooth 2232 is inserted into the corresponding second shear keyway 2213. In this embodiment, structural adhesive is applied between the keyway and key teeth in the first shear keyway 2222 and the second shear keyway 2213 to improve the stability of the connection.

[0057] Specifically, in this embodiment, the first shear keyway 2222 of the first base plate 2221 engages with the second shear key tooth 2212 of the adjacent third base plate 2211, and the first shear key tooth 2232 of the second base plate 2231 engages with the second shear keyway 2213 of the adjacent third base plate 2211, forming a shear force transmission channel. When the structure is under load, the shear force is transmitted through the contact surface between the key tooth and the keyway, avoiding stress concentration at a single planar connection and enhancing the connection strength.

[0058] Furthermore, two adjacent third base plates 2211 can also be laterally connected by keyways and key teeth, thereby improving the overall shear resistance and connection strength.

[0059] In a preferred embodiment, the first edge precast arch unit 222 further includes a first U-shaped embedded steel bar 2225, one end of which is connected to the top of the first web 2223, and the other end is located in the first concrete pouring space 224; the second edge precast arch unit 223 further includes a second U-shaped embedded steel bar 2235, one end of which is connected to the top of the second web 2233, and the other end is located in the second concrete pouring space 225.

[0060] Each of the intermediate precast arch units 221 further includes a third U-shaped embedded steel bar 2217 and a fourth U-shaped embedded steel bar 2218. One end of the third U-shaped embedded steel bar 2217 near the first edge precast arch unit 222 is connected to the top of the third web 2214, and the other end is located in the first concrete pouring space 224. One end of the fourth U-shaped embedded steel bar 2218 near the second edge precast arch unit 223 is connected to the top of the third web 2214, and the other end is located in the second concrete pouring space 225. The fourth U-shaped embedded steel bar 2218 of the previous intermediate precast arch unit 221 and the third U-shaped embedded steel bar 2217 of the next intermediate precast arch unit 221 are both located in the third concrete pouring space 226.

[0061] Specifically, in this embodiment, one end of the first U-shaped embedded steel bar 2225 of the first side precast arch unit 222 is anchored to the top of the first web 2223, and the other end extends into the first concrete pouring space 224. Similarly, the second U-shaped embedded steel bar 2235 of the second side precast arch unit 223 is anchored to the second web 2233 and extends into the second concrete pouring space 225. The third U-shaped embedded steel bar 2217 and the fourth U-shaped embedded steel bar 2218 of the intermediate precast arch unit 221 extend to both sides. The fourth U-shaped embedded steel bar 2218 and the third U-shaped embedded steel bar 2217 of adjacent intermediate precast arch units 221 are located within the third concrete pouring space 226. Shrinkage-compensating concrete is poured into the first concrete pouring space 224, the second concrete pouring space 225, and the third concrete pouring space 226, encasing the U-shaped embedded steel bars to form a high-strength post-cast structural layer.

[0062] Furthermore, a first steel mesh is laid above the first U-shaped embedded steel bar 2225 and the third U-shaped embedded steel bar 2217 located in the first concrete pouring space 224; a second steel mesh is laid above the second U-shaped embedded steel bar 2235 and the fourth U-shaped embedded steel bar 2218 located in the second concrete pouring space 225; and a third steel mesh 2219 is laid above the third U-shaped embedded steel bar 2217 and the fourth U-shaped embedded steel bar 2218 located in the third concrete pouring space 226.

[0063] In this embodiment, the steel mesh and U-shaped embedded steel bars form a three-dimensional steel skeleton, which significantly improves the shear and tensile strength of the post-cast structural layer.

[0064] In a preferred embodiment, the arch seat 230 is provided with a groove 231 within the range corresponding to the arch ring assembly 220. The bottom surface of the groove 231 is recessed with a third positioning keyway (not shown in the figure). The first web plate 2223 and / or the first bottom plate 2221 are provided with third positioning key teeth 2226 corresponding to the third positioning keyway. The second web plate 2233 and / or the second bottom plate 2231 are provided with fourth positioning key teeth 2236 corresponding to the third positioning keyway. The third web plate 2214 and / or the third bottom plate 2211 are provided with fifth positioning key teeth 2220 corresponding to the third positioning keyway. The third positioning key teeth 2226, the fourth positioning key teeth 2236, and the fifth positioning key teeth 2220 are all inserted into the corresponding third positioning keyway.

[0065] In this embodiment, the cooperation between the third positioning keyway and the third positioning key tooth 2226, the fourth positioning key tooth 2236, and the fifth positioning key tooth 2220 significantly improves the connection strength.

[0066] Furthermore, the arch seat 230 also includes a toothed sill, the stepped surface of which faces into the mountainside, and the extension direction of the toothed sill is perpendicular to the force direction of the arch seat 230. By increasing the contact area between the arch seat 230 and the mountainside through the toothed sill, the supporting capacity of the mountainside on the arch seat 230 is improved, preventing the arch seat 230 from settling and causing the arch bridge 230 to become unstable.

[0067] This embodiment also includes temporary tie rods 227, which are arranged along the transverse direction of the bridge. Anchor blocks 228 are respectively provided on the first side precast arch unit 222 and the second side precast arch unit 223. The two ends of the temporary tie rods 227 are connected to the first side precast arch unit 222 and the second side precast arch unit 223 through the anchor blocks 228. Temporary tie rods 227 are installed on the first side precast arch unit 222 and the second side precast arch unit 223, and the temporary tie rods 227 are tensioned from the middle to both sides to lock the shape of the arch assembly 220. Then, shrinkage-compensating concrete is poured in layers to form the first post-cast structural layer 2241, the second post-cast structural layer 2251, and the third post-cast structural layer 2261. After the shrinkage-compensating concrete reaches its design strength, the temporary tie rods 227 are removed, and the joint concrete of the arch seat 230 is poured.

[0068] The arch bridge arch ring structure of this embodiment, when applied to a pedestrian catenary arch bridge, can enhance the bridge's spanning capacity and is suitable for complex terrains such as deep canyons, greatly reducing the workload of temporary measures. In the initial construction phase, an arch bridge system with strong load-bearing capacity can be formed through the arch ring component 220, exhibiting good self-stability and eliminating the need for additional supports or other large-scale temporary facilities. This application eliminates the need for supporting columns on the arch and behind the arch seat 230, avoiding the impact of column foundation excavation and concrete pouring on surface vegetation and maximizing the protection of the ecological environment at the bridge site. Simultaneously, it exhibits good adaptability to the slope stability behind the arch seat 230, demonstrating excellent adaptability to situations where the foundation stability of arch bridges in mountainous areas is severely limited.

[0069] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An arch bridge arch ring structure comprising an arch seat and an arch ring assembly, the arch seat is arranged on the mountain on both sides of a valley, and two ends of the arch ring assembly are fixed on the corresponding arch seats respectively, characterized in that, The arch assembly includes multiple precast arch units and a post-cast structural layer. The multiple precast arch units are connected in a row along the transverse direction of the bridge. The post-cast structural layer is cast between two adjacent precast arch units so that the arch assembly is connected as a whole.

2. The arch ring structure of the arch bridge according to claim 1, characterized in that, The arch assembly includes multiple intermediate precast arch units, a first side precast arch unit, and a second side precast arch unit. The intermediate precast arch units are connected side-by-side along the transverse direction of the bridge. The first side precast arch unit and the second side precast arch unit are located on both sides of the intermediate precast arch unit, respectively. The first side precast arch unit, the second side precast arch unit, and the intermediate precast arch unit are connected side-by-side along the transverse direction of the bridge.

3. The arch bridge arch ring structure according to claim 2, characterized in that, The post-cast structural layer is formed by concrete pouring and includes a first post-cast structural layer, a second post-cast structural layer, and a third post-cast structural layer. A first concrete pouring space is formed between the intermediate precast arch unit and the first edge precast arch unit, a second concrete pouring space is formed between the intermediate precast arch unit and the second edge precast arch unit, and a third concrete pouring space is formed between two adjacent intermediate precast arch units. The first post-cast structural layer is disposed in the first concrete pouring space, the second post-cast structural layer is disposed in the second concrete pouring space, and the third post-cast structural layer is disposed in the third concrete pouring space.

4. The arch bridge arch ring structure according to claim 3, characterized in that, The first prefabricated arch unit at the edge includes a first base plate, a first web plate, and a first transverse diaphragm plate, wherein the first web plate is connected to the top of the first base plate, the bottom surface of the first transverse diaphragm plate is connected to the top surface of the first base plate, and the side surface of the first transverse diaphragm plate is connected to the side wall of the first web plate. The second prefabricated arch unit includes a second base plate, a second web plate, and a second transverse diaphragm plate, wherein the second web plate is connected to the top of the second base plate, the bottom surface of the second transverse diaphragm plate is connected to the top surface of the second base plate, and the side surface of the second transverse diaphragm plate is connected to the side wall of the second web plate. Each of the intermediate precast arch units includes a third base plate, a third web plate, and two third and fourth transverse diaphragms respectively connected to the two sides of the third web plate. The bottom surfaces of the third and fourth transverse diaphragms are connected to the top surface of the third base plate. The first post-cast structural layer is disposed between the first web and the third web, the second post-cast structural layer is disposed between the second web and the third web, and the third post-cast structural layer is disposed between two adjacent third webs.

5. The arch bridge arch ring structure according to claim 4, characterized in that, It also includes multiple flow holes for concrete to pass through, the multiple flow holes being respectively disposed on the first transverse diaphragm, the second transverse diaphragm, the third transverse diaphragm and / or the fourth transverse diaphragm.

6. The arch bridge arch ring structure according to claim 4, characterized in that, The middle portions of the first web, the second web, and the third web are recessed inward to form a groove, and the two sides of the first post-cast structural layer, the second post-cast structural layer, and the third post-cast structural layer are accommodated in the groove.

7. The arch bridge arch ring structure according to claim 4, characterized in that, It also includes a first shear keyway and a second shear keyway, wherein the first shear keyway is disposed on the side wall of the first base plate near the adjacent third base plate, and the second shear keyway is disposed on the side wall of the third base plate near the adjacent second base plate; It also includes a first shear key and a second shear key, wherein the first shear key is disposed on the side wall of the second base plate near the adjacent third base plate, and the second shear key is disposed on the side wall of the third base plate near the adjacent first base plate; The first shear key tooth and the second shear keyway are arranged in a one-to-one correspondence, the second shear key tooth and the first shear keyway are arranged in a one-to-one correspondence, the second shear key tooth is inserted into the corresponding first shear keyway, and the first shear key tooth is inserted into the corresponding second shear keyway.

8. The arch bridge arch ring structure according to claim 7, characterized in that, It also includes structural adhesive, which is applied to the first shear keyway and the second shear keyway.

9. The arch bridge arch ring structure of claim 2, wherein The arch support also includes a toothed ledge, the stepped surface of which faces into the mountain, and the extension direction of the toothed ledge is perpendicular to the force direction of the arch support.

10. The arch bridge arch ring structure of claim 2, wherein It also includes temporary tie rods, which are arranged along the transverse direction of the bridge. The first side precast arch unit and the second side precast arch unit are respectively provided with anchor blocks. The two ends of the temporary tie rods are connected to the first side precast arch unit and the second side precast arch unit through the anchor blocks.

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