Reinforcing structure of solid-web arch bridge
By introducing arch rib components and transverse reinforcement components into solid-web arch bridges, combined with lightweight foamed concrete filler, the problems of unclear reinforcement quality and complex construction in existing reinforcement methods are solved, achieving the effects of improved load-bearing capacity and convenient construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-07
AI Technical Summary
Among the existing methods for reinforcing solid-web arch bridges, the quality of the arch bottom reinforcement is not obvious and it encroaches on the clearance under the bridge, resulting in high costs, especially for bridges crossing water where construction is difficult.
The reinforcement structure adopts a combination of arch rib components and transverse reinforcement components, including longitudinal arch ribs, transverse arch ribs, transverse tie rods and side wall stiffening ribs, combined with lightweight foamed concrete filler, to increase the cross section of the main arch and improve the transverse integrity. The existing main arch ring is used as a construction platform to avoid erecting scaffolding in the water.
It significantly improves the load-bearing capacity and overall structural strength of the arch bridge, reduces construction complexity and cost, keeps the clearance under the bridge unaffected, and enhances construction convenience and safety.
Smart Images
Figure CN224092300U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge reinforcement technology, and in particular to a reinforcement structure for a solid-web arch bridge. Background Technology
[0002] After years of operation, the drainage system within the solid-web slab arch has deteriorated, leading to chronic water accumulation and increased weight on the arch fill material. Combined with natural factors such as material aging and corrosion, most arch bridges have developed varying degrees of damage, with some even becoming dangerous structures posing significant safety hazards. Demolishing and rebuilding all solid-web slab arches with safety concerns would require disrupting traffic and is prohibitively costly. Therefore, based on assessments, structural reinforcement is typically chosen to improve their load-bearing capacity and extend their service life.
[0003] Conventional methods for reinforcing solid-web arches generally include: replacing the filler material on the arch, increasing the cross-section at the arch base, bonding steel plates to the arch base, and bonding fiber composite materials to the arch base. Bonding steel plates or fiber cloth has little effect on improving the performance of arches primarily subjected to compression. Increasing the cross-section at the arch base increases the weight of the arch and requires the construction of a support structure at the arch base to provide a construction platform. This is especially problematic for bridges in water, where the construction of supports in the water is difficult and costly, and the quality of the arch base construction is hard to control. Furthermore, the reinforcement will encroach on the clearance under the bridge.
[0004] Therefore, it is necessary to propose a reinforcement structure for solid-web arch bridges to solve or at least alleviate the above-mentioned defects. Utility Model Content
[0005] The main purpose of this utility model is to provide a reinforcement structure for a solid-web arch bridge to solve the problems of insufficient reinforcement quality at the bottom of the arch and encroachment on the clearance under the bridge in the existing solid-web slab arch reinforcement structure.
[0006] To achieve the above objectives, this utility model provides a reinforcement structure for a solid-web arch bridge, including an arch rib assembly, a transverse reinforcement assembly, and an arch bridge structure; wherein,
[0007] The arch bridge structure includes a bridge deck and multiple existing main arch rings and pier units spaced apart along the longitudinal direction of the bridge. The two arch feet of the existing main arch rings are respectively connected to two adjacent pier units. The arch rib assembly is connected around the top side of the existing main arch ring, and a filling space filled with arch filler is formed between each two adjacent arch rib assemblies. The transverse reinforcement assembly is placed horizontally in the filling space, and the bridge deck is laid on top of the filling space.
[0008] Preferably, the arch rib assembly includes a plurality of longitudinal arch ribs arranged at transverse intervals, the longitudinal arch ribs extending circumferentially along the existing main arch ring, and a plurality of the longitudinal arch ribs are connected to one side of the top of each existing main arch ring.
[0009] Preferably, the arch rib assembly further includes a plurality of transverse arch ribs, which are arranged at circumferential intervals along the longitudinal arch ribs, and a transverse arch rib is provided between every two adjacent longitudinal arch ribs.
[0010] Preferably, the transverse reinforcement assembly includes multiple transverse tie rod units spaced apart along the longitudinal direction of the bridge, each transverse tie rod unit including multiple transverse tie rods spaced apart vertically, and the arch bridge structure also includes two side walls arranged opposite each other in the transverse direction; wherein,
[0011] The horizontal tie rod is placed horizontally in the filling space, and the two ends of the horizontal tie rod are respectively connected to the inner sides of the two side walls.
[0012] Preferably, it further includes side wall stiffening ribs, which are connected to the inner side of the side wall.
[0013] Preferably, it also includes a drainage pipe, which is provided at the arch foot of each of the existing main arch rings. The drainage pipe is located at the top of the pier unit, with one end of the drainage pipe communicating with the filling space and the other end of the drainage pipe passing through and extending out of the existing main arch ring.
[0014] Preferably, the top surface of the longitudinal arch rib is coated with a waterproof layer.
[0015] Preferably, the filler material on the arch in the filled space is lightweight foamed concrete.
[0016] Preferably, each of the existing main arch rings has five longitudinal arch ribs, which are arranged laterally at intervals on one side of the top of the existing main arch ring.
[0017] Preferably, the interval between any two adjacent longitudinal arch ribs is 3m to 3.5m.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] This utility model provides a reinforcement structure for a solid-web arch bridge, comprising an arch rib assembly, a transverse reinforcement assembly, and an arch bridge structure. The arch bridge structure includes a bridge deck and multiple existing main arch rings and pier units spaced apart along the longitudinal direction. The two arch feet of the existing main arch rings are respectively connected to two adjacent pier units. The arch rib assembly is connected to the top side of the existing main arch ring, and a filling space filled with arch filler is formed between each pair of adjacent arch rib assemblies. The transverse reinforcement assembly is placed horizontally within the filling space, and the bridge deck is laid on top of the filling space. This method increases the cross-section of the main arch by using the arch rib assembly, improving its load-bearing capacity. Furthermore, the arch rib assembly's placement on the top side of the existing main arch ring does not affect the clearance under the bridge. Combined with the transverse reinforcement assembly and the arch filler, it enhances the transverse integrity, significantly strengthening the overall structural strength. Moreover, the entire reinforcement structure can utilize the existing main arch ring as a construction platform during construction, greatly improving construction convenience. Attached Figure Description
[0020] 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.
[0021] Figure 1 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present utility model, illustrating an application scenario.
[0022] Figure 2 for Figure 1 A cross-sectional view along the AA direction;
[0023] Figure 3 for Figure 1 A cross-sectional view along the BB direction.
[0024] 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.
[0025] Explanation of icon numbers:
[0026] 10. Arch rib assembly; 110. Longitudinal arch rib; 120. Transverse arch rib; 20. Transverse reinforcement assembly; 210. Transverse tie rod; 30. Arch bridge structure; 310. Bridge deck; 311. Bridge deck pavement layer; 312. Cast-in-place bridge deck layer; 320. Existing main arch ring; 330. Pier unit; 331. Abutment; 332. Pile foundation; 340. Side wall; 341. Infill space; 350. Side wall stiffening rib; 360. Drainage pipe; 370. Waterproof layer. Detailed Implementation
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] Please see the appendix Figure 1-3 This utility model provides a reinforcement structure for a solid-web arch bridge in one embodiment, comprising an arch rib assembly 10, a transverse reinforcement assembly 20, and an arch bridge structure 30. First, it should be noted that in this application, the longitudinal direction refers to the extension direction of the bridge, and the transverse direction refers to the width direction of the bridge. This differs from existing technologies where pasting steel plates or fiber cloth has little effect on improving the performance of the primarily compression-bearing arch ring. Increasing the cross-section under the arch increases the weight of the arch ring and requires the erection of supports at the arch base to provide a construction platform, especially for bridges crossing water, where the erection of supports in the water is difficult and costly, and the construction quality at the arch base is difficult to control. Furthermore, after reinforcement, it also encroaches on the clearance under the bridge. This application addresses the above-mentioned defects in the prior art by providing a reinforcement structure for a solid-web arch bridge, as detailed below:
[0032] The arch bridge structure 30 includes a bridge deck 310 and multiple existing main arch rings 320 and pier units 330 spaced apart along the longitudinal direction of the bridge. The two arch feet of the existing main arch rings 320 are respectively connected to two adjacent pier units 330. The arch rib assembly 10 is connected around the top side of the existing main arch rings 320, and a filling space 341 filled with arch filler is formed between each two adjacent arch rib assemblies 10. The transverse reinforcement assembly 20 is placed horizontally in the filling space 341, and the bridge deck 310 is laid on top of the filling space 341.
[0033] Specifically, the reinforcement structure of the solid-web arch bridge in this application includes an arch rib assembly 10, a transverse reinforcement assembly 20, and an arch bridge structure 30. The arch bridge structure 30 is the existing structure of the bridge to be reinforced, which includes a bridge deck 310 and multiple existing main arch rings 320 and pier units 330 spaced apart along the longitudinal direction of the bridge. The pier units 330 are used to support the arch feet of the arch bridge, such that the two arch feet of the existing main arch rings 320 are respectively connected to two adjacent pier units 330. Typically, the pier unit 330 includes a pile cap 331 and a pile foundation 332. The pile cap 331 is connected to the pile foundation 332, and the arch feet of the existing main arch rings 320 are connected to the pile cap 331. The arch rib assembly 10 is used to increase the cross-section of the main arch and improve the load-bearing capacity. It is connected around the top of the existing main arch rings 320. On the side, this avoids increasing the clearance under the bridge due to its placement below the existing main arch ring 320; while the arch rib components 10 are spaced apart to form filling spaces 341 for filling the arch top filler. This arch top filler is a newly filled arch top filler, preferably lightweight foamed concrete. Lightweight foamed concrete can reduce the dead load and further improve the bearing capacity. It has a lower density than conventional filler, which can reduce the self-weight of the overall structure, improve the bearing capacity of the components, reduce the pressure on the load-bearing components below, and has good waterproof performance. After the arch top filler has solidified to a sufficient strength, the bridge deck 310 is laid on top of the filling space 341; the transverse reinforcement component 20 is used to cooperate with the filled arch top filler to strengthen the transverse integrity of the structure. Therefore, the transverse reinforcement component 20 is set in the filling space 341.
[0034] In a preferred embodiment of the present invention, the arch rib assembly 10 includes a plurality of longitudinal arch ribs 110 arranged at intervals along the transverse direction. The longitudinal arch ribs 110 extend circumferentially along the existing main arch ring 320, and a plurality of longitudinal arch ribs 110 are connected to one side of the top of each existing main arch ring 320.
[0035] It should be noted that the cross-sectional shape of the longitudinal arch rib 110 is consistent with that of the existing main arch ring 320, which facilitates its surrounding arrangement on one side of the top of the existing main arch ring 320. Furthermore, each existing main arch ring 320 is provided with multiple longitudinal arch ribs 110 spaced laterally, thereby increasing the main arch cross-section and improving the load-bearing capacity to achieve a reinforcement effect. Further, each existing main arch ring 320 has five longitudinal arch ribs 110, and the interval between any two adjacent longitudinal arch ribs 110 can be set to 3m to 3.5m. The specific number and interval can be selected by those skilled in the art based on construction costs and the required reinforcement strength of the structure. Preferably, the longitudinal arch ribs 110 can be made of UHPC concrete, which has the advantages of low density, high strength, and good durability.
[0036] In a preferred embodiment of the present invention, the arch rib assembly 10 further includes a plurality of transverse arch ribs 120, which are arranged at intervals along the circumference of the longitudinal arch ribs 110, and a transverse arch rib 120 is provided between each two adjacent longitudinal arch ribs 110.
[0037] It should be noted that the transverse arch ribs 120 strengthen the transverse strength between the longitudinal arch ribs 110. Multiple transverse arch ribs 120 are arranged at intervals along the circumference of the longitudinal arch ribs 110, thus forming a grid rib with the multiple longitudinal arch ribs 110. This increases the cross section of the main arch while ensuring the overall structural strength of the arch rib assembly 10, achieving a good reinforcement function. It is understood that, similar to the longitudinal arch ribs 110, the transverse arch ribs 120 can also be made of UHPC material.
[0038] In a preferred embodiment of this utility model, the transverse reinforcement component 20 includes a plurality of transverse tie rod units spaced apart along the longitudinal direction of the bridge, and each transverse tie rod unit includes a plurality of transverse tie rods 210 spaced apart along the vertical direction. The arch bridge structure 30 also includes two side walls 340 arranged laterally opposite each other.
[0039] The horizontal tie rod 210 is placed horizontally in the filling space 341, and the two ends of the horizontal tie rod 210 are respectively connected to the inner sides of the two side walls 340.
[0040] It is worth noting that the transverse tie rod 210, placed horizontally in the filling space 341, can significantly enhance the transverse integrity of the structure. Typically, the arch bridge structure 30 has side walls 340 on both sides, and the transverse tie rod 210 connects the two side walls 340. Setting multiple transverse tie rods 210 can ensure the uniform distribution of the enhanced integrity and ensure that the overall integrity is enhanced in place. In particular, the transverse tie rods 210 in each of two adjacent transverse tie rod units can be staggered, thereby further improving the rationality and uniformity of the distribution.
[0041] As a preferred embodiment of the present invention, it further includes a side wall stiffening rib 350, which is connected to the inner side of the side wall 340.
[0042] It is worth noting that the side wall stiffening rib 350 is used to improve the structural strength of the side wall 340. It is also worth mentioning that the transverse tie rod 210, which is located at the position of the side wall stiffening rib 350, is connected at both ends between the side wall stiffening ribs 350 on both sides.
[0043] Furthermore, it also includes a drainage pipe 360, which is provided at the arch foot of each of the existing main arch rings 320. The drainage pipe 360 is located at the top of the pier unit. One end of the drainage pipe 360 is connected to the filling space 341, and the other end of the drainage pipe 360 extends through and out of the existing main arch ring 320.
[0044] It should be noted that the drainage pipe 360 is used to improve the drainage performance of the bridge, thereby preventing water accumulation inside the bridge structure and increasing the weight of the filling material on the arch. Therefore, one end of the drainage pipe 360 is inserted into the filling space 341 for connection, while the other end of the drainage pipe 360 is set outside the main arch ring, so that the water generated in the filling space 341 can be discharged to the outside of the bridge, avoiding internal water accumulation. Preferably, the drainage pipe 360 can be set at the arch foot of each existing main arch ring 320 to improve the drainage capacity and ensure that there is a drainage effect at each location.
[0045] Furthermore, the top surface of the longitudinal arch rib 110 is coated with a waterproof layer 370.
[0046] It should be understood that the waterproof layer 370 is used to improve the waterproof capability of the arch rib assembly 10 and prevent the filler from seeping water into the arch rib assembly 10 and affecting the strength of the arch rib assembly 10.
[0047] It is worth mentioning that during construction, the railings were first removed, the bridge deck 310 (including the bridge deck pavement layer 311 and the bridge deck cast-in-place layer 312) was chiseled away, and the existing arch fill material was removed before construction of the arch rib assembly 10 and the transverse reinforcement assembly 20 began. In this way, all construction work was carried out on the arch, using the existing main arch ring 320 as a construction platform. There was no need to erect a large number of supports in the water, making construction simpler, shortening the construction period, and reducing costs. It did not reduce the clearance under the arch, did not affect navigation, and did not affect the overall shape. Then the arch fill material was replaced, and finally the bridge deck pavement and bridge deck cast-in-place layer 312 were restored, and the railings were installed.
[0048] 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. A reinforcement structure for a solid-web arch bridge, characterized in that, This includes arch rib components, lateral reinforcement components, and the arch bridge structure; among which, The arch bridge structure includes a bridge deck and multiple existing main arch rings and pier units spaced apart along the longitudinal direction of the bridge. The two arch feet of the existing main arch rings are respectively connected to two adjacent pier units. The arch rib assembly is connected around the top side of the existing main arch ring, and a filling space filled with arch filler is formed between each two adjacent arch rib assemblies. The transverse reinforcement assembly is placed horizontally in the filling space, and the bridge deck is laid on top of the filling space.
2. The reinforcement structure for a solid-web arch bridge according to claim 1, characterized in that, The arch rib assembly includes multiple longitudinal arch ribs arranged at transverse intervals. The longitudinal arch ribs extend circumferentially along the existing main arch ring, and multiple longitudinal arch ribs are connected to one side of the top of each existing main arch ring.
3. The reinforcement structure for a solid-web arch bridge according to claim 2, characterized in that, The arch rib assembly also includes a plurality of transverse arch ribs, which are arranged at circumferential intervals along the longitudinal arch ribs, and a transverse arch rib is provided between each two adjacent longitudinal arch ribs.
4. The reinforcement structure for a solid-web arch bridge according to claim 1, characterized in that, The transverse reinforcement assembly includes multiple transverse tie rod units spaced apart along the longitudinal direction of the bridge. Each transverse tie rod unit includes multiple transverse tie rods spaced apart vertically. The arch bridge structure also includes two side walls arranged laterally opposite each other. The horizontal tie rod is placed horizontally in the filling space, and the two ends of the horizontal tie rod are respectively connected to the inner sides of the two side walls.
5. The reinforcement structure for a solid-web arch bridge according to claim 4, characterized in that, It also includes side wall stiffening ribs, which are connected to the inner side of the side wall.
6. The reinforcement structure for a solid-web arch bridge according to claim 1, characterized in that, It also includes a drainage pipe, which is provided at the arch foot of each of the existing main arch rings. The drainage pipe is located at the top of the pier unit, with one end of the drainage pipe communicating with the filling space and the other end of the drainage pipe passing through and extending out of the existing main arch ring.
7. The reinforcement structure for a solid-web arch bridge according to claim 2, characterized in that, The top surface of the longitudinal arch rib is coated with a waterproof layer.
8. The reinforcement structure for a solid-web arch bridge according to claim 1, characterized in that, The arch filler in the filled space is made of lightweight foamed concrete.
9. The reinforcement structure for a solid-web arch bridge according to claim 2, characterized in that, The number of longitudinal arch ribs on each existing main arch ring is five, and the five longitudinal arch ribs are arranged laterally at intervals on one side of the top of the existing main arch ring.
10. The reinforcement structure for a solid-web arch bridge according to claim 9, characterized in that, The interval between any two adjacent longitudinal arch ribs is 3m to 3.5m.