Novel prefabricated high-strength combined guardrail structure for bridge
The new bridge railing structure, which combines steel railings with precast concrete bases, solves the problems of insufficient aesthetics and impact resistance in existing technologies, achieving efficient and stable connection and improving construction quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA DESIGN GROUP CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-26
AI Technical Summary
Existing prefabricated bridge railing structures are inadequate in terms of aesthetics and crashworthiness, and have low construction efficiency, making it difficult to meet the requirements of high-quality development.
The structure combines steel guardrail units with precast concrete base units. Through the staggered binding of ring and U-shaped steel bars and the grouting of UHPC in the wet joint groove, combined with shear hinge steel bars, a stable connection between the guardrail and the bridge is achieved.
It improves the aesthetics and crashworthiness of the guardrails, reduces construction difficulty, enhances the quality and connection strength of prefabricated guardrails, and conforms to the concept of green and efficient construction.
Smart Images
Figure CN224281020U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge engineering anti-collision guardrails, specifically relating to a new type of prefabricated assembled high-strength composite guardrail structure for bridges. Background Technology
[0002] With the continuous development of the economy and society, transportation construction has entered a stage of high-quality development, which has placed higher demands on the design and construction of transportation infrastructure. Traditional cast-in-place concrete guardrails require the erection of a large number of scaffolds and formwork, on-site steel reinforcement binding, and on-site concrete pouring. Moreover, they have high labor costs, low construction efficiency, and significant environmental impact, presenting an extensive, inefficient, and highly polluting construction mode.
[0003] Prefabricated assembled guardrails adopt a construction mode of factory prefabrication and on-site assembly, which fully leverages the advantages of centralized prefabrication, improves construction efficiency, shortens the construction cycle, and reduces on-site carbon emissions. This aligns with the modern construction concept of green, efficient, and environmentally friendly practices and meets the requirements of high-quality development.
[0004] Existing prefabricated bridge railings, such as the one disclosed in patent CN219731795U, are prefabricated concrete railing structures with post-cast strips that prevent water seepage and corrosion. A post-cast groove is set at the bottom front side of the precast concrete block, and anchors are set in the post-cast groove and connected and fixed to the embedded parts on the foundation. However, this fixing method is relatively simple, and it is a single concrete railing with poor aesthetics. The strength of the connection between the railing and the bridge deck is still low, and the impact resistance of the railing is not high enough, making it difficult to adapt to bridges with high aesthetic requirements.
[0005] For example, patent CN204059245U discloses a beam-column guardrail structure for roads, including a concrete wall guardrail. The upper part of the concrete wall guardrail is provided with two or more columns, which are spaced apart along the extension direction of the concrete wall guardrail. A horizontal beam is provided above the concrete wall guardrail, which extends parallel to the extension direction of the concrete wall guardrail and is fixed to one side of the columns. Both the columns and the horizontal beam are made of steel structural components. However, this structure is only applicable to ordinary road surfaces and cannot be prefabricated in factories or assembled on-site. The quality is also difficult to inspect, and the steel bar connection method is not convenient for construction, which reduces the reliability of the connection and fails to give full play to the advantages of prefabricated assembled guardrails in terms of speed and efficiency. Utility Model Content
[0006] To address the aforementioned problems, the purpose of this utility model is to provide a novel prefabricated high-strength composite guardrail structure for bridges and its construction method.
[0007] The specific technical solution to achieve the purpose of this utility model is as follows:
[0008] A novel prefabricated high-strength composite guardrail structure for bridges includes steel structure guardrail units and prefabricated concrete base units.
[0009] The steel structure guardrail unit is mounted on the precast concrete base unit;
[0010] The precast concrete base unit is used to connect with the bridge deck and fix the steel structure guardrail unit.
[0011] The bottom surface of the precast concrete base unit on the impact side is provided with a wet joint groove for connecting with the bridge deck.
[0012] Multiple ring-shaped steel bars are provided in the groove of the wet joint, and multiple U-shaped steel bars are provided on the bridge deck.
[0013] Adjacent annular reinforcing bars are connected by binding with multiple longitudinal reinforcing bars;
[0014] The ring-shaped steel bars and U-shaped steel bars are arranged in opposite directions and staggered. The U-shaped opening of the U-shaped steel bar is provided with a hook. A transverse sealing steel bar is provided between the hooks of the U-shaped steel bar. The transverse sealing steel bar intersects with the longitudinal steel bar.
[0015] Furthermore, the steel structure guardrail unit includes a crossbeam, a post, and an L-shaped bracket;
[0016] The column is connected to the precast concrete base unit, and the crossbeam is fixedly connected to the column.
[0017] One side of the L-shaped bracket is fixed to the column, and the other side is fixed to the crossbeam;
[0018] There are multiple crossbeams.
[0019] Furthermore, the crossbeam is a rectangular crossbeam, with its shorter side fixed to the column and its longer side fixed to the L-shaped bracket.
[0020] Furthermore, the top surface of the precast concrete base unit is connected to the column of the steel structure guardrail unit, and the bottom surface of the precast concrete base unit is connected to the bridge panel.
[0021] The impact face of the precast concrete base unit is a single-slope type.
[0022] Furthermore, a steel sleeve is provided on the top surface of the precast concrete base unit, and a steel base plate is provided at the bottom of the steel sleeve;
[0023] The uprights of the steel structure guardrail unit are installed inside the steel sleeve, and cement mortar is poured into the gap between the uprights and the steel sleeve.
[0024] Grouting holes are provided on the steel base plate, and grouting channels are provided between the grouting holes on the steel base plate and the wet joint groove.
[0025] Furthermore, the steel structure guardrail units of the multiple combined guardrail structures are connected by crossbeams, and the crossbeams are connected by sleeves.
[0026] The precast concrete base units of the multiple combined guardrail structures are connected by concrete poured into the wet joint groove, and continuous short steel bars are also provided in the wet joint groove.
[0027] The continuous short steel bars and longitudinal steel bars are tied together.
[0028] Furthermore, shear hinges are provided between the multiple combined guardrail structures, with shear hinge reinforcement bars pre-embedded in the shear hinges and concrete poured in.
[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0030] (1) The new type of prefabricated high-strength combined guardrail structure for bridges of this utility model adopts a structure combining steel structure guardrail and concrete base. The concrete base adopts a prefabricated concrete base. The steel structure guardrail and the concrete base are connected by a pre-embedded steel sleeve. On the one hand, the weight of the guardrail is reduced and the amount of steel used is reduced. On the other hand, the rigidity and strength of the guardrail are guaranteed. It can meet a variety of usage scenarios and has both practicality and economy.
[0031] (2) In this utility model, the precast concrete base unit is connected to the bridge panel through a cement mortar pad and an open wet joint groove. The UHPC grouting in the groove and the interlaced steel reinforcement are used to strengthen the connection with the bridge panel, which effectively ensures the quality of construction, reduces the difficulty of construction, and effectively improves the quality of precast guardrail.
[0032] (3) The impact surface of the precast concrete base unit of this utility model is a single slope type, which can reduce the width of the guardrail and reduce the self-weight of the structure, and has the advantage of being lightweight.
[0033] The present invention will be further described below with reference to specific embodiments. Attached Figure Description
[0034] Figure 1 This is a cross-sectional schematic diagram of the novel prefabricated high-strength composite guardrail structure for bridges according to this utility model.
[0035] Figure 2 This is a cross-sectional schematic diagram of the precast concrete base unit of this utility model.
[0036] Figure 3 This is an elevation view of the novel prefabricated high-strength composite guardrail for bridges according to this utility model.
[0037] Figure 4 This is a schematic diagram of the prefabricated high-strength composite guardrail structure for bridges and the steel reinforcement connection of the bridge deck, which is a novel type of bridge structure according to this utility model.
[0038] Figure 5 This is a schematic diagram of the steel bar connection in the wet joint groove of this utility model.
[0039] Figure 6 This is a diagram showing the longitudinal segment connection of the guardrail according to this utility model. Detailed Implementation
[0040] Example
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0042] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.
[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0044] Combination Figure 1 A new type of prefabricated high-strength composite guardrail structure for bridges includes steel structure guardrail units and prefabricated concrete base units.
[0045] The steel structure guardrail unit is mounted on the precast concrete base unit;
[0046] The steel structure guardrail unit is used to realize the guardrail function, and the precast concrete base unit is used to connect with the bridge panel and fix the steel structure guardrail unit.
[0047] The bottom surface of the precast concrete base unit on the impact side is provided with a wet joint groove 7 for connecting with the bridge deck.
[0048] Multiple ring-shaped steel bars 18 are provided in the wet joint groove 7, and multiple U-shaped steel bars 16 are provided on the bridge deck.
[0049] Adjacent annular reinforcing bars 18 are connected by multiple longitudinal reinforcing bars 17;
[0050] The annular reinforcing bars 18 and U-shaped reinforcing bars 16 are arranged in an alternating pattern. The U-shaped opening of the U-shaped reinforcing bars 16 is provided with hooks. Transverse sealing reinforcing bars 19 are provided between the hooks of the U-shaped reinforcing bars 16. The transverse sealing reinforcing bars 19 intersect with the longitudinal reinforcing bars 17 to form a closed loop. Figure 5 As shown.
[0051] It should also be noted here that, in this embodiment, the annular reinforcing bar 18 does not extend beyond the wet joint groove 7 and is deeply embedded inside the precast concrete base unit (e.g., Figure 2 As shown), in some embodiments, it can also be tied to the pre-set transverse or longitudinal "beam" steel bars inside the precast concrete base unit. This setting method can make the closed-loop tied steel bar form more stable and further improve the anti-collision performance of the guardrail structure of this solution.
[0052] Based on this, the connection between the wet joint groove 7 and the bridge panel is effectively guaranteed by UHPC grouting and the staggered and closed-loop setting of the steel bars. This reduces the construction difficulty and increases the connection strength, thereby improving the quality of the precast guardrail.
[0053] The steel structure guardrail unit includes a horizontal beam 1, a column 2, and an L-shaped bracket 3;
[0054] The column 2 is connected to the precast concrete base unit, and the crossbeam 1 is fixedly connected to the column 2. The crossbeam 1 and the column 2 are made of HR700F high-strength steel.
[0055] One side of the L-shaped bracket 3 is fixedly connected to the column 2, and the other side is fixedly connected to the crossbeam 1;
[0056] In addition, there are multiple crossbeams 1, and the number of L-shaped brackets 3 can be the same as the number of crossbeams 1. In this embodiment, there are two crossbeams 1, which are connected to the columns 2 by L-shaped brackets 3 respectively. In some embodiments, a crossbeam 1 can be connected to the columns 2 by multiple L-shaped brackets 3, for example, by two L-shaped brackets 3 and columns 2.
[0057] More specifically, the crossbeam 1 is a rectangular crossbeam, with its shorter side fixed to the column 2 and its longer side fixed to the L-shaped bracket 3, for example, by bolts. The L-shaped bracket 3 and the crossbeam 1 are connected by welding.
[0058] The top surface of the precast concrete base unit is connected to the column 2 of the steel structure guardrail unit, and the bottom surface of the precast concrete base unit is connected to the bridge panel. A cement mortar pad 8 and a leveling pad 22 are provided at the connection between the precast concrete base unit and the bridge panel for grouting.
[0059] The impact face of the precast concrete base unit is a single slope type. The single slope type can reduce the width of the guardrail and the self-weight of the structure, which has the advantage of being lightweight.
[0060] The bottom surface of the precast concrete base unit on the impact side is provided with a wet joint groove 7 for connection with the bridge deck.
[0061] In this embodiment, a steel sleeve 13 is provided on the top surface of the precast concrete base unit, and a steel base plate 14 is provided at the bottom of the steel sleeve 13.
[0062] The uprights 2 of the steel structure guardrail unit are installed inside the steel sleeve 13, and cement mortar is poured into the gap between the uprights 2 and the steel sleeve 13.
[0063] Grouting holes are provided on the steel base plate 14, and grouting channels 12 are provided between the grouting holes of the steel base plate 14 and the wet joint groove 7.
[0064] Concrete 15 is injected into the wet joint groove 7 through the grouting hole 12 from the grouting hole 14 to achieve connection with the bridge deck. In this embodiment, UHPC is selected to improve the strength of the guardrail structure.
[0065] Additionally, it should be noted that the top surface of the wet joint groove 7 is inclined to the outside of the guardrail, and the grout outlet 20 is also set to face upwards at an angle during construction to ensure the density of the grout.
[0066] In this embodiment, multiple prefabricated guardrail structural units are longitudinally connected to form a roadside protection facility for a highway bridge. The steel structure guardrail units of the multiple combined guardrail structures are connected by crossbeams 1, and the crossbeams 1 are connected by sleeves 5. In this embodiment, the sleeves 5 are also made of high-strength steel HR700F material to enhance the strength of the guardrail and improve its anti-collision performance.
[0067] The precast concrete base units of the multiple combined guardrail structures are also connected by wet joint grooves 7, and continuous short steel bars 25 are provided in the wet joint grooves 7. The continuous short steel bars 25 and the longitudinal steel bars 17 are tied together to enhance the strength between the guardrail connections.
[0068] In addition, shear hinges 23 are provided between multiple combined guardrail structures, and shear hinge steel bars 24 are pre-embedded in the shear hinges 23 and UHPC is poured for connection.
[0069] That is, multiple combined guardrail structures are connected by a horizontal beam 1 on one hand, and longitudinally connected by a wet joint groove 7 filled with concrete 15, continuous short steel bars 25 and longitudinal steel bars 17, and shear hinge 23 on the other hand, which makes the connection form stable.
[0070] A wet joint groove template 21 is provided on the outside of the wet joint groove 7, and a slurry outlet 20 is provided on the wet joint groove template 21.
[0071] The construction method of this combined guardrail structure is as follows: First, a precast concrete base unit is prepared, and a steel sleeve 13 is pre-embedded on the top surface of the precast concrete base unit and a grouting channel 12 is set. After demolding, the base, bottom surface and groove of the precast concrete base unit are roughened.
[0072] Then, a ring-shaped steel bar 18 is precast in the wet joint groove 7 of the precast concrete base unit, and longitudinal steel bars 17 are inserted and tied to the precast ring-shaped steel bar 18.
[0073] U-shaped steel bars 16 are pre-embedded on the bridge deck, and the leveling layer 10 is cast in place on the bridge deck to the edge of the precast concrete base unit. A leveling pad 22 is set at the position of the precast concrete base unit, and a mortar pad layer 8 is laid.
[0074] The precast concrete base unit is hoisted onto the mortar cushion layer 8, and the U-shaped steel bars 16 are interlaced into the gaps between the precast ring steel bars 18. The transverse sealing short steel bars 19 are inserted between the hooks of the U-shaped steel bars 16 and tied.
[0075] A wet joint groove template 21 is installed on the outside of the wet joint groove 7, and a grout outlet 20 is provided on the top surface of the template.
[0076] On-site mixing of concrete grouting material, in this embodiment, is UHPC grouting material. It is poured from grouting pipe 12 into wet joint groove 7. Grouting is stopped after grouting is evenly discharged from grout outlet 20. The formwork is removed after the set strength is reached.
[0077] Concrete grout is injected into the shear hinge 23 between the combined guardrail structures;
[0078] Insert the precast steel sleeve 13 of the precast concrete base unit into the column 2, fix the position, and then fill the gap between the column 2 and the steel sleeve 13 with cement mortar. Install the crossbeam 1 on the column 2.
[0079] Finally, pour the remaining leveling layer 10 on the inner side of the guardrail and lay the bridge deck paving 9.
[0080] The present invention adopts a structure that combines steel structure railing and concrete base, which reduces the weight and steel usage of the railing while ensuring its rigidity and strength. It can meet various usage scenarios and combines practicality and economy.
[0081] In addition, in this scheme, the precast concrete base unit is connected to the bridge panel through a cement mortar cushion layer on the one hand, and an open wet joint groove is set on the other hand. The UHPC grouting in the groove and the staggered steel reinforcement are used to connect with the bridge panel, which effectively ensures the construction quality, reduces the construction difficulty, and effectively improves the quality of the precast guardrail.
[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A new type of prefabricated assembled high-strength composite guardrail structure for bridges, characterized in that, Includes steel structure guardrail units and precast concrete base units; The steel structure guardrail unit is mounted on the precast concrete base unit; The precast concrete base unit is used to connect with the bridge deck and fix the steel structure guardrail unit. The bottom surface of the precast concrete base unit on the impact side is provided with a wet joint groove (7) for connecting with the bridge deck. Multiple ring-shaped steel bars (18) are provided in the wet joint groove (7), and multiple U-shaped steel bars (16) are provided on the bridge deck; The adjacent annular steel bars (18) are connected by multiple longitudinal steel bars (17); The ring-shaped steel bar (18) and the U-shaped steel bar (16) are arranged opposite to each other. The U-shaped opening of the U-shaped steel bar (16) is provided with a hook. A transverse sealing steel bar (19) is provided between the hooks of the U-shaped steel bar (16). The transverse sealing steel bar (19) intersects with the longitudinal steel bar (17).
2. The novel prefabricated assembled high-strength composite guardrail structure for bridges according to claim 1, characterized in that, The steel structure guardrail unit includes a horizontal beam (1), a column (2), and an L-shaped bracket (3); The column (2) is connected to the precast concrete base unit, and the crossbeam (1) is fixedly connected to the column (2); One side of the L-shaped bracket (3) is fixedly connected to the column (2), and the other side is fixedly connected to the crossbeam (1); There are multiple crossbeams (1).
3. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 2, characterized in that, The beam (1) is a rectangular cross-section beam, with its shorter side fixed to the column (2) and its longer side fixed to the L-shaped bracket (3).
4. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 2, characterized in that, The top surface of the precast concrete base unit is connected to the column (2) of the steel structure guardrail unit, and the bottom surface of the precast concrete base unit is connected to the bridge panel. The impact face of the precast concrete base unit is a single-slope type.
5. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 4, characterized in that, A steel sleeve (13) is provided on the top surface of the precast concrete base unit, and a steel base plate (14) is provided at the bottom of the steel sleeve (13). The column (2) of the steel structure guardrail unit is set inside the steel sleeve (13), and cement mortar is poured into the gap between the column (2) and the steel sleeve (13); Grouting holes are provided on the steel base plate (14), and grouting channels (12) are provided between the grouting holes of the steel base plate (14) and the wet joint groove (7).
6. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 5, characterized in that, The steel structure guardrail units of the multiple combined guardrail structures are connected by crossbeams (1), and the crossbeams (1) are connected by sleeves (5); Multiple precast concrete base units of the combined guardrail structure are connected by concrete (15) poured into the wet joint groove (7), and continuous short steel bars (25) are also provided in the wet joint groove (7). The continuous short steel bars (25) and longitudinal steel bars (17) are tied together.
7. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 6, characterized in that, Shear hinges (23) are provided between multiple combined guardrail structures, and shear hinge steel bars (24) are pre-embedded in the shear hinges (23) and concrete is poured in.
8. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 4, characterized in that, The connection between the precast concrete base unit and the bridge deck is provided with a cement mortar pad (8) and a leveling pad (22) for grouting.
9. The novel prefabricated high-strength composite guardrail structure for bridges according to claim 5, characterized in that, The crossbeam (1), column (2) and sleeve (5) are made of high-strength steel HR700F material; The top surface of the wet joint groove (7) is inclined to the outside of the guardrail to ensure the density of the grout.