Structure of solid-web arch bridge deformation joint
By setting expansion joint structures at the arch crown and arch foot of the arch bridge unit, including reinforcement components and sealing sections, the problems of cracks and water leakage in solid-web arch bridges are solved, achieving waterproofing of the structure and ease of construction, and extending the service life of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-17
AI Technical Summary
Solid-web arch bridges are prone to cracking under the influence of live loads, temperature changes, or concrete shrinkage, leading to serious water leakage. Furthermore, existing expansion joints are complex in structure, cumbersome in construction, and costly.
Expansion joint structures are set at the arch crown and arch foot of the arch bridge unit, including reinforcement components, asphalt sections, first deformation sealing sections and second deformation sealing sections. The reinforcement components connect the asphalt sections and sealing sections, and the seals fill the sealing sections. The asphalt sections at the arch foot of adjacent arch bridge units are bonded together to form a continuous structure.
It effectively releases bridge deck stress, reduces crack formation, provides good waterproofing, has a simple structure, is easy to construct, and ensures the strength and service life of the bridge.
Smart Images
Figure CN224133551U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering technology, and in particular to the structure of a deformation joint for a solid-web arch bridge. Background Technology
[0002] In the early days, my country built a large number of solid-web arch bridges. After years of operation, it was found that under the influence of live loads, temperature changes, or concrete shrinkage, the main arch ring and the superstructure of solid-web arch bridges will deform. At this time, transverse cracks will appear at the connection between the arch crown or arch foot and the pier (abutment). These cracks are easily damaged by the impact of vehicles, which not only seriously affects the driving comfort, but also makes it easy for water to seep into the structural layer and filling material, further increasing the weight of the filling material, reducing its strength, and aggravating the development of arch bridge defects, thus affecting its load-bearing capacity and normal service life.
[0003] In the existing technology, most solid-web arch bridges do not have expansion joints, resulting in a large number of cracks and serious water leakage. Some bridges have expansion joints installed at the corresponding locations, which meet the expansion requirements, but they are complex in structure, cumbersome in construction, difficult to replace, and costly.
[0004] Therefore, it is necessary to propose a construction method for the expansion joint of a solid-web arch bridge 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 structure for the expansion joint of a solid-web arch bridge, so as to solve the problems of cracks and serious water leakage in existing solid-web arch bridges.
[0006] To achieve the above objectives, this utility model provides a structure for a solid-web arch bridge expansion joint, comprising an expansion joint structure and multiple arch bridge units arranged sequentially along the longitudinal direction of the bridge; wherein,
[0007] Each of the arch bridge units is provided with an expansion joint structure at the arch crown and at both arch feet along the longitudinal direction, the expansion joint structure extending vertically through the arch; wherein,
[0008] The expansion joint structure includes a reinforcement component and an asphalt section, a first deformation sealing section, and a second deformation sealing section arranged sequentially from top to bottom. Both the first deformation sealing section and the second deformation sealing section are filled with seals. The top end of the reinforcement component is connected to the asphalt section, and the bottom end of the reinforcement component extends into the first deformation sealing section. The asphalt sections at the arch foot between two adjacent arch bridge units are fitted together.
[0009] Preferably, each arch bridge unit includes a pavement layer, a cast-in-place layer, and a side wall arranged sequentially from top to bottom. The asphalt section is disposed in the pavement layer, the first deformation sealing section is disposed in the cast-in-place layer, and the second deformation sealing section is disposed in the side wall.
[0010] Preferably, the reinforcing component includes a steel plate and a plain round steel bar. The steel plate is laid at the bottom of the asphalt section, the top end of the plain round steel bar is welded to the steel plate, and the bottom end of the plain round steel bar extends downward into the first deformable sealing section.
[0011] Preferably, the longitudinal length of the asphalt section located at the arch foot is greater than the longitudinal length of the asphalt section located at the arch crown.
[0012] Preferably, the sealing element in the first deformable sealing section is a flexible sponge sealing strip.
[0013] Preferably, the sealing element in the second deformable sealing section is a lightweight foam board.
[0014] Preferably, the longitudinal length of the asphalt section located at the arch is 8cm to 9cm.
[0015] Preferably, the steel plate and the plain round steel bar are coated with an anti-rust layer.
[0016] Preferably, the longitudinal length of both the first deformable sealing section and the second deformable sealing section is 2cm to 3cm.
[0017] Preferably, each expansion joint structure contains multiple reinforcing components, which are arranged at intervals along the transverse bridge direction.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] This utility model provides a structure for a solid-web arch bridge expansion joint, comprising an expansion joint structure and multiple arch bridge units arranged sequentially along the longitudinal direction of the bridge. Each arch bridge unit has an expansion joint structure at its arch crown and at both arch abutments along the longitudinal direction. The expansion joint structure extends vertically and penetrates the arch. The expansion joint structure includes a reinforcing component and, from top to bottom, an asphalt section, a first deformation sealing section, and a second deformation sealing section. Both the first and second deformation sealing sections are filled with sealants. The top end of the reinforcing component is connected to the asphalt section, and the bottom end extends into the first deformation sealing section. The asphalt sections at the arch abutments of adjacent arch bridge units are fitted together. This arrangement of expansion joint structures at the arch crown and at the arch abutments on both sides of the pier centerline accommodates arch bridge deformation, releases bridge deck stress, and reduces crack formation. Simultaneously, the overall structure is simple, easy to construct, and provides good waterproofing due to the multiple sealing sections, preventing the structural filler from penetrating and thus ensuring structural strength and the bridge's service life. 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 expansion joint structure at the top of the pier in one embodiment of the present utility model;
[0022] Figure 2 This is a cross-sectional schematic diagram of the expansion joint structure at the arch in one embodiment of the present invention.
[0023] Figure 3 This is an elevation view of an application scenario of the expansion joint structure in one embodiment of the present invention.
[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. Expansion joint structure; 110. Asphalt section; 120. First deformation sealing section; 130. Second deformation sealing section; 140. Reinforcing component; 141. Steel plate; 142. Plain round steel bar; 20. Arch bridge unit; 210. Arch crown; 220. Arch foot; 230. Pavement layer; 240. Cast-in-place layer; 250. Side wall. 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 those features. 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. If 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 an embodiment of a solid-web arch bridge expansion joint structure, comprising an expansion joint structure 10 and multiple arch bridge units 20 arranged sequentially along the longitudinal direction of the bridge. 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. Unlike most existing solid-web arch bridges that typically do not have expansion joints, resulting in numerous cracks and severe water leakage, and some that do have expansion joints, which, while meeting expansion requirements, are complex in structure, cumbersome in construction, difficult to replace, and costly, this application addresses these shortcomings by providing a solid-web arch bridge expansion joint structure, as detailed below:
[0032] Each arch bridge unit 20 has a deformation joint structure 10 at its arch crown 210 and at both arch feet 220 along the longitudinal direction. The deformation joint structure 10 extends vertically through the arch. The deformation joint structure 10 includes a reinforcing component 140 and asphalt sections 110, a first deformation sealing section 120, and a second deformation sealing section 130 arranged sequentially from top to bottom. Both the first deformation sealing section 120 and the second deformation sealing section 130 are filled with seals. The top end of the reinforcing component 140 is connected to the asphalt section 110, and the bottom end of the reinforcing component 140 extends into the first deformation sealing section 120. The asphalt sections 110 at the arch feet 220 of two adjacent arch bridge units 20 are fitted together.
[0033] Specifically, the construction of the expansion joint of the solid-web arch bridge in this application includes an expansion joint structure 10 and multiple arch bridge units 20 arranged sequentially along the longitudinal direction of the bridge. This solid-web arch bridge is formed by splicing together multiple arch bridge units 20 segments extending longitudinally. Each arch bridge unit 20 has an arch crown 210 and two arch feet 220. Considering the location where the deformation is greatest and cracks are prone to occur, the expansion joint structure 10 is provided at the arch crown 210 and the two arch feet 220. It is worth mentioning that the arch feet 220 of two adjacent arch bridge units 20 are located on the same pier. Therefore, the expansion joint structure 10 at the arch feet 220 of two adjacent arch bridge units 20 is also located on both sides of the centerline of the pier.
[0034] The expansion joint structure 10 includes a reinforcement component 140 and asphalt sections 110, a first deformation sealing section 120, and a second deformation sealing section 130 arranged sequentially from top to bottom. In a preferred embodiment, each arch bridge unit 20 includes a pavement layer 230, a cast-in-place layer 240, and a sidewall 250 arranged sequentially from top to bottom. The asphalt sections 110 are laid at the top of the arch bridge unit 20, within the pavement layer 230 of the bridge deck. They can be filled with elastomeric modified asphalt to better adapt to deformation. Notably, considering that vehicles will directly impact the asphalt sections 110 when passing over them, the asphalt sections 110 at the arch foot 220 between adjacent arch bridge units 20 are arranged in close contact, ensuring a continuous arrangement of the asphalt sections 110 at the arch foot 220 between adjacent arch bridge units 20, eliminating gaps and improving traffic continuity. Comfort; the first deformable sealing section 120 and the second deformable sealing section 130, in addition to adapting to bridge deformation, also serve to prevent water from seeping into the bridge structure and damaging the internal filler. During laying, the first deformable sealing section 120 is correspondingly set in the cast-in-place layer 240, and the second deformable sealing section 130 is correspondingly set in the side wall 250. Preferably, the longitudinal length of the first deformable sealing section 120 and the second deformable sealing section 130 is generally set to 2cm to 3cm. In this application, it can be set to 2cm. Those skilled in the art can select according to actual needs. The reinforcing component 140 is used to improve the overall connection between the asphalt section 110 and the first deformable sealing section 120 to strengthen the connection. Therefore, the two ends of the reinforcing component 140 are respectively set in the asphalt section 110 and the first deformable sealing section 120.
[0035] In a preferred embodiment of the present invention, the reinforcing component 140 includes a steel plate 141 and a plain round steel bar 142. The steel plate 141 is laid at the bottom of the asphalt section 110, the top end of the plain round steel bar 142 is welded to the steel plate 141, and the bottom end of the plain round steel bar 142 extends downward into the first deformable sealing section 120.
[0036] It should be noted that the steel plate 141 and the plain round steel bar 142 can be welded together to form a T-shaped plate, so that the flange section (steel plate 141) can be set at the bottom of the asphalt section 110, and the web section (plain round steel bar 142) can be set in the first deformable sealing section 120, thereby strengthening the structural integrity and structural strength between the asphalt section 110 and the first deformable sealing section 120; wherein, the steel plate 141 and the plain round steel bar 142 can be spot welded, and preferably, the thickness of the steel plate 141 can be 6mm.
[0037] In a preferred embodiment of the present invention, the longitudinal length of the asphalt segment 110 located at the arch foot 220 is greater than the longitudinal length of the asphalt segment 110 located at the arch crown 210.
[0038] It is worth noting that, since the asphalt segments 110 at the arch feet 220 between two adjacent arch bridge units 20 need to be connected and spliced to ensure the continuity of the road surface and ensure driving comfort, the longitudinal length of the asphalt segments 110 at the arch feet 220 needs to be increased so that the length is sufficient for them to be laid together. The length of the asphalt segments 110 at the arch crown 210 only needs to meet the strength requirements of the expansion joint structure 10. Preferably, the longitudinal length of the asphalt segments 110 at the arch crown 210 is 8cm to 9cm, and the longitudinal length of the asphalt segments 110 at the arch feet 220 can be set to 10cm to 11cm. In a preferred embodiment of this application, the longitudinal length of the asphalt segments 110 at the arch crown 210 is 8cm, and the longitudinal length of the asphalt segments 110 at the arch feet 220 is 10cm. Thus, the asphalt segments 110 at the arch feet 220 between two adjacent arch bridge units 20 are connected to form an asphalt segment 110 with a length of 20cm, and the transverse direction is paved across the entire width of the bridge deck.
[0039] In a preferred embodiment of the present invention, the sealing element in the first deformable sealing section 120 is a flexible sponge sealing strip.
[0040] It is worth noting that the flexible sponge sealing strip can adapt to deformation, prevent rainwater leakage, and due to its softness and elasticity, it can also absorb and disperse the external force transmitted by the overhead vehicle, playing a good role in shock absorption.
[0041] Furthermore, the seal in the second deformable sealing section 130 is a lightweight foam board.
[0042] It should be noted that lightweight foam boards also have the functions of adapting to deformation and preventing rainwater leakage. Moreover, lightweight foam boards have higher strength. Unlike sealing strips, they can also participate in a certain amount of stress by being set in the side wall 250, thus improving the structural strength.
[0043] Furthermore, the surfaces of the steel plate 141 and the plain round steel bar 142 are coated with an anti-rust layer.
[0044] It should be noted that this ensures that when some road surface water seeps into the surface of the reinforcement component 140, it will not cause corrosion to the reinforcement component 140. Therefore, by pre-coating with an anti-rust layer, the service life of the reinforcement component 140 can be increased and the later maintenance can be reduced.
[0045] It is worth noting that waterproof layers can be pre-installed between the pavement layer 230, the cast-in-place layer 240, and the side wall 250 in the arch bridge unit 20, in order to better ensure the waterproof effect between the structural layers.
[0046] Furthermore, each of the expansion joint structures 10 contains a plurality of reinforcing components 140, which are arranged at intervals along the transverse bridge direction.
[0047] Understandably, this is to ensure that multiple reinforcing components 140 can be evenly distributed along the transverse direction of the bridge, thereby ensuring uniform overall distribution and better overall reinforcement effect.
[0048] It is worth mentioning that when constructing the expansion joint of the solid-web arch bridge in this application, the following construction sequence can be adopted: pre-embedded lightweight foam board → construction of the first waterproof layer → reserved groove → construction of the bridge deck cast-in-place layer → filling the gap with flexible sponge → pre-embedding steel bars and placing steel strips → construction of the second waterproof layer → reserved groove → construction of the bridge deck pavement layer → construction of elastomeric modified asphalt → edge trimming → cooling.
[0049] 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 construction of a deformation joint of a solid-web arch bridge, characterized by, It includes an expansion joint structure and multiple arch bridge units arranged sequentially along the longitudinal direction of the bridge; among which, Each of the arch bridge units is provided with an expansion joint structure at the arch crown and at both arch feet along the longitudinal direction, the expansion joint structure extending vertically through the arch; wherein, The expansion joint structure includes a reinforcement component and an asphalt section, a first deformation sealing section, and a second deformation sealing section arranged sequentially from top to bottom. Both the first deformation sealing section and the second deformation sealing section are filled with seals. The top end of the reinforcement component is connected to the asphalt section, and the bottom end of the reinforcement component extends into the first deformation sealing section. The asphalt sections at the arch foot between two adjacent arch bridge units are fitted together.
2. The construction of a solid arch bridge deformation joint according to claim 1, characterized in that, Each arch bridge unit includes a pavement layer, a cast-in-place layer, and a side wall arranged sequentially from top to bottom. The asphalt section is disposed in the pavement layer, the first deformation sealing section is disposed in the cast-in-place layer, and the second deformation sealing section is disposed in the side wall.
3. The construction of a solid arch bridge deformation joint according to claim 1, characterized in that, The reinforcement component includes a steel plate and a plain round steel bar. The steel plate is laid at the bottom of the asphalt section, the top end of the plain round steel bar is welded to the steel plate, and the bottom end of the plain round steel bar extends downward into the first deformable sealing section.
4. The construction of a solid arch bridge deformation joint according to claim 1, characterized in that, The longitudinal length of the asphalt section located at the arch foot is greater than the longitudinal length of the asphalt section located at the arch crown.
5. The construction of a solid arch bridge deformation joint according to claim 1, characterized in that, The sealing element in the first deformable sealing section is a flexible sponge sealing strip.
6. The construction of a solid arch bridge deformation joint according to claim 1, characterized in that, The sealing element in the second deformable sealing section is a lightweight foam board.
7. The construction of a solid arch bridge deformation joint according to claim 4, wherein The longitudinal length of the asphalt section located at the top of the arch is 8cm to 9cm.
8. The construction of a solid arch bridge deformation joint according to claim 3, characterized in that, The steel plate and the plain round steel bar are coated with an anti-rust layer.
9. The construction of a solid arch bridge deformation joint according to claim 1, wherein The longitudinal lengths of both the first deformable sealing section and the second deformable sealing section are 2cm to 3cm.
10. The construction of a solid arch bridge deformation joint according to claim 3, wherein The number of reinforcement components in each expansion joint structure is multiple, and the multiple reinforcement components are arranged at intervals along the transverse bridge direction.