Wing-wall-free transition guardrail for highway bridge roadbed
By using prefabricated highway bridge subgrade transition railings without wing walls, the complexity of construction and the difficulty of maintenance in the transition section between the bridge and the subgrade have been solved, enabling rapid installation and efficient maintenance, and improving the stability and safety of the structure.
Patent Information
- Application Number
- CN202520975854.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-19
AI Technical Summary
The existing guardrails at the transition section between bridges and roadbeds have complex construction processes, significant maintenance defects, and insufficient structural coordination, making them difficult to adapt to different roadbed types and alignments.
The prefabricated highway bridge subgrade transition guardrail without wing walls is adopted, including components such as square columns, guide connecting plates, three-wave transition plates and lower friction beams, forming a stable and flexible connection. The buffering and energy absorption performance is improved by π-shaped support components and hexagonal anti-blocking blocks.
It enables rapid installation and maintenance of the bridge-roadbed transition section, reduces construction complexity and traffic impact, improves structural stability and safety, and adapts to different roadbed forms and alignments.
Smart Images
Figure CN223951614U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bridge guardrail technical field, concretely relates to a highway bridge subgrade wing wall free transition guardrail. BACKGROUND
[0002] Guardrail refers to the setting on the road or bridge, the purpose is to prevent the out-of-control vehicle from going out of the road or bridge, has the function that the vehicle cannot break through, underpass, leap over the road or bridge and beautifies the road or bridge.
[0003] In the bridge and subgrade transition section, due to the different forms and structures of guardrail, in the existing road engineering, the guardrail transition of bridge section and subgrade section usually adopts the concrete wing wall structure, and the traditional construction mode forms the gradual transition wall body by pouring concrete on site, and the one end is rigidly connected with the bridge guardrail through embedded steel, and the other end is connected with the subgrade guardrail such as corrugated beam through ground anchoring. From the engineering practice, the application of concrete wing wall has the following significant technical bottlenecks:
[0004] 1. Complex construction process: the concrete wing wall needs to adopt the cast-in-place construction process, involves formwork setting, steel bar binding, concrete pouring and other procedures. In the existing road upgrading and reconstruction project, the construction site is often limited by the existing traffic flow, and it is difficult to carry out large-scale mechanical operation. Especially in mountainous road or urban elevated road section, the narrow operation space leads to the difficulty in formwork transportation and installation, and the construction precision is difficult to guarantee.
[0005] 2. Large maintenance defects: when the wing wall structure is damaged by vehicle collision, the conventional maintenance needs to adopt the mode of breaking and rebuilding. Due to the integrity of the concrete structure, local damage often leads to the removal of the whole wing wall, and the adjacent lane must be closed for formwork pouring during maintenance, the single wing wall maintenance time is long, which seriously affects the traffic capacity of the road.
[0006] 3. Insufficient structural coordination: the existing concrete wing wall adopts fixed cross-section gradual design, which is difficult to adapt to different subgrade forms. When special linear or special-shaped guardrails are encountered, special-shaped formwork often needs to be customized, which increases the construction cost. In addition, the rigid connection structure makes it difficult to adjust, and the joint cracking is easy to occur due to uneven settlement in soft foundation section.
[0007] Therefore, in view of the above problems, the utility model provides a fabricated highway bridge subgrade wing wall free transition guardrail, to realize the mechanical connection of the guardrail connection at the transition section of bridge and subgrade, increase the toughness of the transition zone connection structure, so as to solve the problems existing in the prior art. UTILITY MODEL CONTENTS
[0008] Therefore, the main purpose of the utility model is to provide a highway bridge subgrade wing wall free transition guardrail to solve the problems of complex construction process, large maintenance defects and insufficient structural coordination of the existing connecting structure.
[0009] To achieve the above object, the technical scheme of the utility model is as follows:
[0010] A highway bridge subgrade wing wall free transition guardrail is arranged between the bridge section guardrail and the subgrade section guardrail, the wing wall free transition guardrail is of a fabricated structure, and comprises:
[0011] The transition guardrail frame comprises:
[0012] The square columns are arranged between the bridge section guardrail and the subgrade section guardrail;
[0013] The transition guardboard is detachably arranged on the square column and comprises:
[0014] The guide connecting plate is connected with the lower concrete of the bridge guardrail at one end and connected with the transition section three-wave plate at the other end;
[0015] The transition section three-wave plate is detachably arranged on the inner side of the square column, and the other end of the transition section three-wave plate is connected with the standard section three-wave plate of the subgrade section guardrail.
[0016] In a preferred embodiment, the end of the guide connecting plate connected with the lower concrete of the bridge guardrail is a triangular steel plate, and a first long bolt hole is arranged on the guide connecting plate and connected with the lower concrete of the bridge guardrail by a bolt.
[0017] In a preferred embodiment, a π-shaped support is further arranged on the inner side of the connection between the guide connecting plate and the transition section three-wave plate, and the π-shaped support is further connected with the lower concrete of the bridge guardrail and the end lower cross beam of the bridge guardrail.
[0018] In a preferred embodiment, a connecting bolt is arranged in the bolt hole at the lower end of the two side wings of the π-shaped support, and the connecting bolt is further connected with the lower concrete of the bridge guardrail; the upper end of the two side wings of the π-shaped support is further connected with the end lower cross beam of the bridge guardrail by a bolt.
[0019] In a preferred embodiment, the transition section three-wave plate is a corrugated steel plate matched with the standard section three-wave plate.
[0020] In a preferred embodiment, the other end of the transition section three-wave plate extends to the inner side of the subgrade section guardrail, and a hexagonal anti-blocking block is further arranged on the inner side of the connection between the transition section three-wave plate and the standard section three-wave plate, and the hexagonal anti-blocking block is connected with the round column by a connecting bolt.
[0021] In a preferred embodiment, the highway bridge subgrade wing wall-free transition guardrail further comprises a lower friction beam, which is arranged on the lower side of the guide connecting plate and the transition section three-wave plate, and is connected with the bridge guardrail lower concrete and the square column through bolts.
[0022] In a preferred embodiment, the lower friction beam is provided with a second long bolt hole at one end close to the bridge guardrail lower concrete, which is matched with a connecting bolt connected with the lower base inclined surface of the bridge guardrail lower concrete.
[0023] In a preferred embodiment, the end of the lower friction beam away from the bridge guardrail lower concrete is curved outward.
[0024] In a preferred embodiment, the upper end elevation of the square column is the same as that of the round column of the subgrade section guardrail.
[0025] Compared with the prior art, the highway bridge subgrade wing wall-free transition guardrail has the following beneficial effects:
[0026] 1. By arranging the assembled wing wall-free transition guardrail, the assembled wing wall-free transition guardrail can be directly installed between the bridge section and the subgrade section guardrail, and stable transition connection is realized. At the same time, by canceling the traditional concrete wing wall structure, not only the complex construction process and the difficulty of post-maintenance of cast-in-place construction are avoided, but also the construction efficiency is significantly improved. Moreover, the standardized components of the guardrail support rapid replacement, and only the damaged unit needs to be replaced during maintenance, without the need for overall demolition and reconstruction, which greatly reduces the influence of road occupation maintenance on traffic flow, and is especially suitable for quality improvement and reconstruction projects of the road section in use.
[0027] 2. By the synergistic effect of the guide connecting plate, the transition section three-wave plate and the lower friction beam, the bridge guardrail lower concrete and the subgrade standard section three-wave plate are rigidly anchored to form a continuous stress system. The stress generated at the bridge and subgrade joint due to temperature deformation or foundation settlement can be effectively released to avoid structure cracking. This flexible connection mechanism not only maintains the overall linear smoothness of the guardrail, but also adapts to the thermal expansion and contraction characteristics of the concrete structure, ensuring the stability of long-term service.
[0028] 3. By arranging the π-shaped support and the hexagonal anti-blocking block, the buffer energy absorption performance of the guardrail system is significantly improved, a multi-level protection mechanism is provided for the guardrail main body, and the safety of the guardrail structure in use is ensured. The problems of complex construction process, large maintenance defects and insufficient structural coordination of the existing connection structure are solved. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.
[0030] Figure 1 It is a structure schematic view of the main view angle after the installation of the wing wall-free transition guardrail of the highway bridge subgrade of the present application.
[0031] Figure 2 It is a structure schematic view of the rear view angle after the installation of the wing wall-free transition guardrail of the highway bridge subgrade of the present application.
[0032] Figure 3 It is a structure schematic view of the main view angle after the installation of the wing wall-free transition guardrail of the highway bridge subgrade of the present application. Figure 2 It is a local enlarged view of A in the present application.
[0033] Figure 4 It is a structure schematic view of the π-shaped support of the present application.
[0034] Figure 5 It is a structure schematic view of the guide connecting plate and the transition section three-wave plate of the present application.
[0035] Figure 6 It is a structure schematic view of the lower friction beam of the present application.
[0036]
Main component symbol explanation
[0037] 1, bridge guardrail end upper beam; 2, bridge guardrail end lower beam; 3, guide connecting plate; 4, bridge guardrail lower concrete; 5, transition section three-wave plate; 6, lower friction beam; 7, square column; 8, round column; 9, standard section three-wave plate; 10, hexagonal anti-blocking block; 11, upper connecting column; 12, π-shaped support; 13, first long bolt hole; 14, second long bolt hole; 15, connecting bolt. DETAILED DESCRIPTION
[0038] The structure of the wing wall-free transition guardrail of the highway bridge subgrade will be further described in detail below in combination with the drawings and the embodiments of the present application.
[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0040] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0041] It is to be understood that the terms "first", "second", and the like, used in the specification and claims herein, are used to distinguish between similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the term "or" in the examples herein is used to mean "and / or," unless explicitly indicated to refer to an alternative exclusive context. Moreover, the term "include," and / or "including," and the like, as used herein, is used to mean "comprising" or "including," and not by way of
[0042] For purposes of the description hereinafter, spatial or directional terms, such as "above", "below", "top", "bottom", "upper", "lower", and the like, are used with reference to the exemplary illustrations as shown in the drawings. However, it is to be understood that the spatial and directional terms are used herein for purposes of description and illustration, and do not limit the present application. There is no implication that the spatial or directional terms are intended to limit the
[0043] Referring to Figures 1-6 The utility model provides a technical scheme:
[0044] The utility model provides a highway bridge subgrade wing wall free transition guardrail, the wing wall free transition guardrail is assembled structure, installs between bridge section guardrail and subgrade section guardrail, is used for realizing the stable transition of bridge section guardrail and subgrade section guardrail, including transition guardrail frame and install on transition guardrail frame transition guard, the transition guardrail frame includes a plurality of square columns 7, square column 7 installs between bridge section guardrail and subgrade section guardrail, and the upper end elevation of square column 7 is same with the upper end elevation of the round column 8 of subgrade section guardrail, so that the installation height of the transition guard after installation can be same with the height of the standard section three wave board 9 of subgrade section guardrail, guarantees the continuity and neatness of guardrail structure, the transition guard includes guide connecting plate 3 and transition section three wave board 5, one end of guide connecting plate 3 is connected with bridge guardrail lower concrete 4 of bridge section guardrail, and the other end is connected with transition section three wave board 5, transition section three wave board 5 can be detachably installed in the inner side of square column 7, and the other end of transition section three wave board 5 is connected with the standard section three wave board 9 of subgrade section guardrail, forms continuous highway bridge subgrade wing wall free transition guardrail, connects bridge section guardrail and subgrade section guardrail.
[0045] In the above description, by the setting of guide connecting plate 3, transition section three wave board 5 and square column 7, the wing wall free transition guardrail of highway bridge subgrade that is convenient to assemble is formed between bridge section guardrail and subgrade section guardrail, the connecting place between bridge section and subgrade section is protected, effectively guarantee the safety of vehicle driving, and the overall structure is assembled structure, is convenient for on -the -spot assembly and use, and the adaptation flexibility is strong, can be applicable to the transition section guardrail connection under different working conditions.
[0046] In a preferred embodiment, as shown in Figure 1 、 Figure 2 and Figure 5 , the end of the guide connecting plate 3 connected with the bridge guardrail lower concrete 4 is a triangular steel plate, and a first long bolt hole 13 is provided on the guide connecting plate 3 for bolt connection with the bridge guardrail lower concrete 4 (the bolt is anchored in the concrete), which can deform and give way through the first long bolt hole 13, facilitating the expansion and contraction of the transition between the bridge section and the subgrade section.
[0047] In a preferred embodiment, as shown in Figure 1 、 Figure 2 and Figure 4As shown, the inner side of the connection between the guide connecting plate 3 and the transition section three-wave plate 5 is also provided with a π-shaped support 12, which is connected to the back side of the guide connecting plate 3 and the transition section three-wave plate 5 through bolt connection, connecting the guide connecting plate 3 and the transition section three-wave plate 5. And 4 connecting bolts 15 are installed in the bolt holes at the lower end of the two side wings of the π-shaped support 12, which are also fixed with the lower base inclined surface chemical anchor of the bridge guardrail lower concrete 4; the upper end of the two side wings of the π-shaped support 12 is bolted with the bridge guardrail end lower crossbeam 2, and the π-shaped support 12 is connected with the bridge guardrail lower concrete 4 and the bridge guardrail end lower crossbeam 2 through the connecting bolts 15, forming a stable connection structure and playing a role in strengthening the strength of the guardrail.
[0048] In the above description, through the setting of the π-shaped support 12, the connection between the guide connecting plate 3 and the transition section three-wave plate 5 can be stably connected, and the connection between the guide connecting plate 3 and the transition section three-wave plate 5 can be connected with the bridge guardrail lower concrete 4 and the bridge guardrail end lower crossbeam 2, forming an overall protection structure, effectively strengthening the strength and stability of the guardrail structure. At the same time, the π-shaped support 12 adopts a U-shaped structure design, and its unique geometric configuration can realize energy dissipation through elastic deformation when bearing external impact, thereby significantly improving the buffering and energy absorption performance of the guardrail system. This U-shaped cross section produces progressive deformation during the stress process, effectively dispersing the impact load and reducing the risk of rigid collision through structural rebound, providing a multi-level protection mechanism for the guardrail body.
[0049] In a preferred embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the transition section three-wave plate 5 is a corrugated steel plate structure matched with the standard section three-wave plate 9, which can form a multi-level stress structure through its three continuous wave cross section design. When a vehicle collides, the wave cross section absorbs kinetic energy through progressive deformation, and can withstand more impact energy, effectively reducing the severity of the accident. At the same time, the wave superposition design of the transition section three-wave plate 5 can significantly improve the cross-sectional moment of inertia, which can resist the distortion caused by lateral load, and the overall structure can still maintain linear smoothness in complex terrain, reducing the structural deviation caused by foundation settlement.
[0050] In a preferred embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown in the drawings, the other end of the transition section three-wave plate 5 extends to the inside of the roadbed section guardrail, and a hexagonal anti-blocking block 10 is also installed on the inside of the connection between the transition section three-wave plate 5 and the standard section three-wave plate 9, and the hexagonal anti-blocking block 10 is connected with the round column 8 through a connecting bolt.
[0051] In the above description, by installing the hexagonal anti-blocking block 10 at the connection between the round column 8 and the transition section three-wave plate 5 and the standard section three-wave plate 9, the hexagonal anti-blocking block 10 can effectively absorb impact kinetic energy through the honeycomb-shaped geometry of the hexagonal shape of the hexagonal anti-blocking block 10 when a vehicle collides with the guardrail, and at the same time, the remaining energy is uniformly transmitted to the round column 8 and the foundation along the hexagonal side surface, avoiding local structural failure caused by stress concentration.
[0052] In a preferred embodiment, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 6 , the highway bridge roadbed wing wall-free transition guardrail further comprises a lower friction beam 6, which is installed on the lower side of the guide connecting plate 3 and the transition section three-wave plate 5, and one end of the lower friction beam 6 is connected with the lower part of the bridge guardrail lower concrete 4 through a bolt, and the other end is connected with the square column 7 through a bolt.
[0053] In the above description, by providing the lower friction beam 6, the lower base inclined surface of the bridge guardrail lower concrete 4 can be connected with the square column 7, which not only enhances the integrity of the connection between the lower base inclined surface of the bridge guardrail lower concrete 4 and the square column 7, but also avoids direct rigid contact between the end of the bridge guardrail lower concrete 4 and the vehicle during driving due to failure, effectively ensuring the driving safety of the vehicle.
[0054] Specifically, as shown in Figure 4 and Figure 6 , one end of the lower friction beam 6 close to the bridge guardrail lower concrete 4 is provided with a second long bolt hole 14, which is used in cooperation with the connecting bolt 15, and through the provision of the second long bolt hole 14, deformation accommodation effect can be achieved, facilitating the expansion and contraction at the transition between the bridge section and the roadbed section. The other end of the lower friction beam 6 away from the bridge guardrail lower concrete 4 is curved outward to form a curved transition surface, ensuring the driving safety of the vehicle.
[0055] In a preferred embodiment, as shown in Figure 1 and Figure 2 , at the installation position of the bridge roadbed wing wall-free transition guardrail, the end of the bridge guardrail end upper beam 1 of the bridge section guardrail is curved away from the bridge deck to form a curved transition surface, ensuring the driving safety of the vehicle.
[0056] The use process of the highway bridge roadbed wing wall-free transition guardrail comprises: installing the guide connecting plate 3, the transition section three-wave plate 5 and the square stand column 7 between the bridge section guardrail and the roadbed section guardrail, forming the highway bridge roadbed wing wall-free transition guardrail convenient for assembly, protecting the connecting part between the bridge section and the roadbed section, and effectively ensuring the safety of vehicle driving. Meanwhile, the overall structure of the guardrail structure is an assembly type structure, which is convenient for on-site assembly and use, has high adaptability, can be applicable to the transition section guardrail connection under different working conditions, and effectively solves the problems of complex construction process, large maintenance defects and insufficient structural coordination of the existing connection structure.
[0057] The above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model.
Claims
1. A transition guardrail for highway bridge subgrade without wing walls, installed between the bridge section guardrail and the subgrade section guardrail, characterized in that: The wingless transition railing is a prefabricated structure, including: Transition guardrails, including: Several square columns (7) are provided between the bridge section guardrail and the roadbed section guardrail; A transition guard plate, detachably mounted on the square column (7), includes: The guide connecting plate (3) is connected at one end to the lower concrete (4) of the bridge railing of the bridge section and at the other end to the three-wave plate (5) of the transition section. The transition section three-wave plate (5) is detachably installed inside the square column (7), and the other end of the transition section three-wave plate (5) is connected to the standard section three-wave plate (9) of the roadbed guardrail; A π-shaped support (12) is also provided on the inner side of the connection between the guide connecting plate (3) and the transition section three-wave plate (5). The π-shaped support (12) is also connected to the lower concrete (4) of the bridge railing and the lower crossbeam (2) at the end of the bridge railing.
2. The transition guardrail for highway bridge subgrade without wing walls as described in claim 1, characterized in that: The guide connecting plate (3) is connected to the lower concrete (4) of the bridge railing at one end by a triangular steel plate, and a first long bolt hole (13) is provided on the guide connecting plate (3) to be bolted to the lower concrete (4) of the bridge railing.
3. The highway bridge subgrade transition guardrail without wing walls as described in claim 1, characterized in that: The π-shaped support (12) has connecting bolts (15) installed in the bolt holes at the lower ends of the two wing plates. The connecting bolts (15) are also connected to the lower concrete (4) of the bridge railing. The upper ends of the two wing plates of the π-shaped support (12) are also bolted to the lower crossbeam (2) at the end of the bridge railing.
4. The highway bridge subgrade transition guardrail without wing walls as described in claim 1, characterized in that: The transition section three-wave plate (5) is a corrugated steel plate that matches the standard section three-wave plate (9).
5. A highway bridge subgrade transition guardrail without wing walls as described in claim 1, characterized in that: The other end of the transition section three-wave plate (5) extends to the inner side of the roadbed section guardrail, and a hexagonal anti-blocking block (10) is also provided on the inner side of the connection between the transition section three-wave plate (5) and the standard section three-wave plate (9). The hexagonal anti-blocking block (10) is connected to the round column (8) by a connecting bolt.
6. A highway bridge subgrade transition guardrail without wing walls as described in claim 1, characterized in that: The highway bridge subgrade transition guardrail also includes a lower friction beam (6), which is located on the underside of the guide connecting plate (3) and the transition section three-wave plate (5), and is bolted to the lower concrete (4) and square column (7) of the bridge guardrail.
7. A highway bridge subgrade transition guardrail without wing walls as described in claim 6, characterized in that: The lower friction beam (6) is provided with a second long bolt hole (14) at one end near the lower concrete (4) of the bridge railing. The second long bolt hole (14) matches the connecting bolt (15), which is also connected to the lower base slope of the lower concrete (4) of the bridge railing.
8. A transition guardrail for highway bridge subgrade without wing walls as described in claim 6, characterized in that: The lower friction beam (6) bends outward at the end away from the lower concrete (4) of the bridge railing.
9. A transition guardrail for highway bridge subgrade without wing walls as described in claim 1, characterized in that: The elevation of the upper end of the square post (7) is the same as the elevation of the upper end of the round post (8) of the roadbed section guardrail.