Anti-collision guardrail

Abstract

The utility model relates to the technical field of guardrails, in particular to an anti-collision guardrail which comprises a prefabricated shell and a connecting column, the shell wall of the prefabricated shell is formed by pouring ultra-high performance concrete, a cavity is formed in the prefabricated shell, and a vertical partition plate is arranged in the cavity; the connecting columns are located in cavities of the prefabricated shells, the prefabricated shells are fixed through the connecting columns, and the two sides of each section of prefabricated guardrail are spliced in a bell and spigot mode. According to the anti-collision guardrail, a prefabricated forming mode is adopted, cast-in-place of the anti-collision guardrail is not needed, the prefabricated shell is prefabricated through ultra-high performance concrete, a good anti-collision effect is achieved through high strength, high toughness, good durability and impact resistance of the prefabricated shell, the overall structure is simple, and construction operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of guardrails, in particular to an anti-collision guardrail. Background Art

[0002] Prefabrication and assembly is an important way to promote high-quality, low-carbon, environmentally friendly and industrialized bridge construction and achieve high-quality development of bridges. At present, the prefabrication and assembly technology of standard bridge superstructures has matured and has been widely promoted. The prefabrication and assembly technology of bridge substructures in low-intensity areas (7 degrees and below) is also becoming increasingly mature and has been rapidly promoted. However, as an important component of the bridge, the anti-collision guardrail is still mainly cast-in-place, which does not match the current status of bridge technology.

[0003] At present, anti-collision guardrails are mainly divided into concrete guardrails, combined guardrails and assembled steel guardrails. Concrete guardrails are low in cost, but their durability is poor, their weight is heavy, and the landscape effect is relatively average; combined guardrails are slightly lighter in weight, the landscape effect is average, and the cost is moderate, but the upper structure of the guardrail is insufficient in rigidity, and the upper and lower structures are not rigid, which affects the guardrail's function of blocking vehicles; steel guardrails are light in weight, have better landscape effects, and are recyclable, which conforms to the current green and environmentally friendly design concept, but they are expensive, and their own anti-corrosion performance is poor, requiring regular maintenance. Utility Model Content

[0004] The utility model provides an anti-collision guardrail, which is used to solve the above defects of the existing anti-collision guardrail.

[0005] The utility model provides an anti-collision guardrail, comprising:

[0006] A prefabricated shell, wherein the shell wall of the prefabricated shell is cast by ultra-high performance concrete, a cavity is formed inside the prefabricated shell, and a vertical partition is arranged in the cavity;

[0007] A connecting column is located in the cavity of the prefabricated shell, and the prefabricated shell is fixed by the connecting column.

[0008] According to an anti-collision guardrail provided by the utility model, the shell wall thickness of the prefabricated shell is 3 to 5 cm, a steel mesh is arranged inside the shell wall of the prefabricated shell, and the shell wall of the prefabricated shell is formed by casting ultra-high performance concrete combined with the steel mesh.

[0009] According to a crash barrier provided by the utility model, there are multiple vertical partitions in the cavity of the prefabricated shell, and the multiple vertical partitions are arranged in parallel along the length direction of the prefabricated shell. At least two groups of adjacent two vertical partitions among the multiple vertical partitions are enclosed with the prefabricated shell to form a connecting column casting cavity, and the connecting column casting cavity is combined with casting fine stone concrete and embedded steel bars to form the connecting column.

[0010] According to an anti-collision guardrail provided by the utility model, a through hole is provided on the upper part of the vertical partition, and cable laying holes are provided at positions flush with the through holes at both ends of the prefabricated shell, and the cable laying holes and the through holes form a cable facility laying channel in the upper part of the cavity of the prefabricated shell.

[0011] According to an anti-collision guardrail provided by the utility model, a hand hole well is arranged on the prefabricated shell at a position corresponding to the cable facility laying channel.

[0012] According to a crash barrier provided by the utility model, both ends of the top of the prefabricated shell are provided with a socket structure, and the socket structure includes a socket male buckle located at one end of the top of the prefabricated shell and a socket female buckle located at the other end of the top of the prefabricated shell. The socket male buckle and the socket female buckle can be socket-fitted to realize the prefabricated assembly of two crash barriers.

[0013] According to an anti-collision guardrail provided by the utility model, the socket male buckle comprises a male buckle transverse portion and a male buckle sinking portion located at one end of the male buckle transverse portion, a sinking receiving platform is formed on the male buckle sinking portion, and the end of the male buckle sinking portion is flush with the end of the prefabricated shell;

[0014] The socket female buckle includes a female buckle transverse portion, the upper surface of the female buckle transverse portion is flush with the upper surface of the male buckle transverse portion, the lower surface of the female buckle transverse portion is flush with the sinking receiving platform of the male buckle sinking portion, the female buckle transverse portion extends beyond the end of the prefabricated shell, and the extending portion is consistent with the size of the sinking receiving platform of the male buckle sinking portion.

[0015] According to an anti-collision guardrail provided by the utility model, the prefabricated shell has a length of 180 to 220 cm, a height of 80 to 100 cm, and a thickness of 40 to 55 cm. The vertical partitions are arranged in the internal cavity of the prefabricated shell at intervals of 35 to 40 cm along the length direction of the prefabricated shell.

[0016] The utility model provides an anti-collision guardrail, which adopts a prefabricated molding form. There is no need to cast the anti-collision guardrail on site. Ultra-high performance concrete is used to prefabricate the prefabricated shell. It has a good anti-collision effect with its high strength, high toughness, good durability and impact resistance. The overall structure is simple and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the internal structure of the anti-collision guardrail provided by the utility model;

[0019] Figure 2 It is a schematic diagram of a vertical section of the anti-collision guardrail provided by the utility model;

[0020] Figure 3 It is a structural schematic diagram of the prefabricated shell provided by the utility model;

[0021] Figure 4 It is a structural schematic diagram of the socket structure provided by the utility model.

[0022] Reference numerals:

[0023] 1. Prefabricated shell; 2. Vertical partition; 3. Connecting column; 4. Steel mesh; 5. Through hole; 6. Hand hole; 7. Socket male buckle; 71. Transverse part of male buckle; 72. Sinking part of male buckle; 8. Socket female buckle; 81. Transverse part of female buckle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0026] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] Combine the following Figure 1 to Figure 4 The specific structure of the anti-collision guardrail of the utility model is described.

[0030] An embodiment of the utility model provides an anti-collision guardrail, combined with Figure 1 and Figure 2 As shown, the anti-collision guardrail includes a prefabricated shell 1 and a connecting column 3, wherein the shell wall of the prefabricated shell 1 is cast by ultra-high performance concrete, a cavity is formed inside the prefabricated shell 1, and a vertical partition 2 is arranged in the cavity; the connecting column 3 is located in the cavity of the prefabricated shell 1, and is suitable for fixing the prefabricated shell 1 through the connecting column 3.

[0031] It is understandable that the anti-collision guardrail of this embodiment is in the form of prefabricated molding, and there is no need to cast the anti-collision guardrail on site. Specifically, the main body of the anti-collision guardrail is a prefabricated shell 1, see Figure 3As shown, the prefabricated shell 1 is a thin shell with an internal cavity. The shell wall thickness of the prefabricated shell 1 is 3 to 5 cm, and its shell wall is formed by pouring ultra-high performance concrete. Ultra-high performance concrete, referred to as UHPC (Ultra-High Performance Concrete), is an innovative cement-based engineering material. Ultra-high performance concrete includes two aspects of "ultra-high", namely ultra-high durability and ultra-high mechanical properties. Compared with ordinary concrete materials, it has more excellent mechanical properties: higher strength (compressive strength>150MPa, tensile strength>8MPa), better ductility and toughness, better durability and impact resistance. The prefabricated shell 1 makes full use of the high strength, high durability and good construction performance of ultra-high performance concrete (UHPC). Ultra-high performance concrete usually has high flexural strength and structural ductility due to the addition of steel fibers, and the UHPC structure has good energy absorption capacity due to the good deformation performance and fracture toughness of UHPC. The structure still has strong tensile strength after cracking, which can effectively improve the impact resistance of the structure. The prefabricated shell 1 is prefabricated with ultra-high performance concrete, which avoids the use of excessive conventional casting concrete in the casting of the anti-collision guardrail. It has a lighter deadweight and can also achieve a better anti-collision effect.

[0032] See also Figure 1 As shown, a vertical partition 2 is arranged in the internal cavity of the prefabricated shell 1. The vertical partition 2 is perpendicular to the side of the anti-collision guardrail. The vertical partition 2 forms a keel support structure in the internal cavity of the prefabricated shell 1, which can enhance the overall structural strength of the prefabricated shell 1. A connecting column 3 is also arranged in the internal cavity of the prefabricated shell 1. The connecting column 3 is used to fix the anti-collision guardrail. Taking the application of the anti-collision guardrail of a bridge as an example, when the main beam of the bridge is prefabricated, embedded bars extending out of the main beam are reserved on the main beam as connecting steel bars of the connecting column 3. When the anti-collision guardrail of this embodiment is installed on the main beam, the position of the connecting column 3 in the cavity of the prefabricated shell 1 corresponds to the embedded bars of the main beam, and then fine stone concrete is poured on the embedded bars to form the connecting column 3 connecting the main beam of the bridge and the prefabricated shell 1, thereby completing the fixation of the anti-collision guardrail.

[0033] In some specific embodiments, the shell wall thickness of the prefabricated shell 1 is 4 cm, a steel mesh 4 is arranged inside the shell wall, and the shell wall of the prefabricated shell 1 is formed by pouring ultra-high performance concrete with the steel mesh 4. The steel mesh 4 is a high-strength steel mesh, which can increase the toughness of the shell wall of the final prefabricated shell 1 and improve the anti-collision performance of the anti-collision guardrail.

[0034] The length of the prefabricated shell 1 is generally 180 to 220 cm, the height is 80 to 100 cm (the height can be adjusted according to different anti-collision guardrail grade specifications), and the thickness is 40 to 55 cm. Vertical partitions 2 are arranged every 35 to 40 cm along the length direction of the prefabricated shell 1 in the internal cavity of the prefabricated shell 1. There are multiple vertical partitions 2 in the cavity of the prefabricated shell 1, and the multiple vertical partitions 2 are arranged in parallel along the length direction of the prefabricated shell 1. At least two groups of two adjacent vertical partitions 2 in the multiple vertical partitions 2 are surrounded by the prefabricated shell 1 to form a connecting column casting cavity, and the connecting column casting cavity is used to cast concrete to form a connecting column 3. In some specific embodiments of SB-level anti-collision guardrails, the length of each anti-collision guardrail is 200 cm, the height of the 200 cm span standard segment guardrail is 90 cm, the thickness is 48 cm, and the thickness of the prefabricated shell 1 is 4 cm. A vertical partition board 2 is arranged at intervals of about 35 to 40 cm inside the prefabricated shell 1 , forming a total of six vertical partition boards 2 .

[0035] In order to achieve stable anchoring with the main beam of the bridge, two connecting columns 3 are set. The two connecting columns 3 are formed near the two ends of the cavity of the prefabricated shell 1 of the anti-collision guardrail. Specifically, the two vertical partitions 2 near the end of each end of the six vertical partitions 2 and the shell wall of the prefabricated shell 1 are surrounded by a connecting column casting cavity as a casting template for the connecting column 3. When the main beam of the bridge is prefabricated, connecting column steel bars are reserved. The distance between two adjacent groups of connecting column steel bars is exactly the distance between the two reserved positions of the connecting columns 3 in the cavity of the prefabricated shell 1 (connecting column casting cavity). When fixing the anti-collision guardrail, the prefabricated shell 1 is put on the connecting column steel bars so that the connecting column steel bars are located in the connecting column casting cavity. After it is in place, fine stone concrete is poured to achieve the formation of the connecting column 3 and the fixation of the anti-collision guardrail. The process is simple.

[0036] In other embodiments of the anti-collision guardrail of the utility model, a through hole 5 is provided on the upper part of the vertical partition 2, and cable laying holes are provided at the positions flush with the through holes 5 at both ends of the prefabricated shell 1. The cable laying holes and the through holes 5 form a cable facility laying channel in the upper part of the cavity of the prefabricated shell 1. Anti-collision guardrails are generally used on both sides of roads or bridges. In order to increase the beauty of roads or bridges, it is sometimes necessary to create a landscape effect on the anti-collision guardrail. The cable laying holes and the through holes 5 of this embodiment can be used for the cable facility laying channel. After the anti-collision guardrail is installed, the cable equipment is threaded and installed through the cable facility laying channel. The cable equipment is threaded inside the prefabricated shell 1, which looks neat and beautiful as a whole, and can also protect the cables. In order to facilitate the maintenance of the cables in the later stage, in this embodiment, a hand hole well 6 is provided on the prefabricated shell 1 at a position corresponding to the cable facility laying channel. The cables inside the prefabricated shell 1 can be observed through the hand hole well 6 and simple maintenance can be performed.

[0037] The anti-collision guardrail of the utility model is a prefabricated modular guardrail. When in use, multiple anti-collision guardrails can be spliced ​​together. In some specific examples, socket structures are provided at both ends of the top of the prefabricated shell 1. The socket structure includes a socket male buckle 7 located at one end of the top of the prefabricated shell 1 and a socket female buckle 8 located at the other end of the top of the prefabricated shell 1. The socket male buckle 7 and the socket female buckle 8 can be socket-fitted to realize the prefabricated assembly of two anti-collision guardrails.

[0038] Specifically, in some specific examples, the socket male buckle 7 includes a male buckle transverse portion 71 and a male buckle sinking portion 72 located at one end of the male buckle transverse portion 71, a sinking receiving platform is formed on the male buckle sinking portion 72, and the end of the male buckle sinking portion 72 is flush with the end of the prefabricated shell 1; the socket female buckle 8 includes a female buckle transverse portion 81, the upper surface of the female buckle transverse portion 81 is flush with the upper surface of the male buckle transverse portion 71, and the lower surface of the female buckle transverse portion 81 is flush with the sinking receiving platform of the male buckle sinking portion 72, the female buckle transverse portion 81 exceeds the end of the prefabricated shell 1, and the exceeding part is consistent with the size of the sinking receiving platform of the male buckle sinking portion 72.

[0039] Combine 1 and Figure 4 As shown, when two anti-collision guardrails are connected, the socket male buckle 7 of one anti-collision guardrail and the socket female buckle 8 of the other anti-collision guardrail are socket-engaged. Specifically, the female buckle lateral portion 81 of the socket female buckle 8 of one anti-collision guardrail is buckled with the male buckle sinking portion 72 of the socket male buckle 7 of the other anti-collision guardrail. Since the end of the male buckle sinking portion 72 is flush with the end of the prefabricated shell 1, the female buckle lateral portion 81 exceeds the end portion of the prefabricated shell 1 and is consistent in size with the sinking receiving platform of the male buckle sinking portion 72. Therefore, after the socket-engagement, the two anti-collision guardrails can be tightly fitted and connected to each other, and the upper surfaces are highly flush to form a plane.

[0040] In some embodiments of the anti-collision guardrail, the prefabricated shell 1 is provided with a thickened portion at the lower portion corresponding to the anti-collision side of the anti-collision guardrail, so that the prefabricated shell 1 is formed into a structure that is narrow at the top and wide at the bottom. The opposite side of the prefabricated shell 1 corresponding to the anti-collision side of the anti-collision guardrail is provided as an inclined surface inclined toward the anti-collision side. Figure 2 As shown, the thickness of the bottom of the anti-collision guardrail is 48cm, the thickness of the top is 20cm, and the upper part of the anti-collision guardrail is an inclined isosceles trapezoidal structure. A thickened portion is provided at the lower part of the anti-collision side of the anti-collision guardrail to increase the anti-collision performance during collision. When a collision occurs, the opposite side of the anti-collision side of the anti-collision guardrail is provided as an inclined surface to exert a certain reverse force against the impact force of the anti-collision side after the collision occurs, thereby protecting the structural stability of the anti-collision guardrail.

[0041] The various embodiments of the anti-collision guardrail of the utility model described above can be combined with each other to form a new technical solution structure. From the perspective of practicality, the thin-shell prefabricated anti-collision guardrail has high strength, high durability, and high prefabrication and assembly, which has important practical significance for landscape improvement, reducing later maintenance and repair, increasing guardrail safety performance, and promoting prefabrication and assembly. The development of molds and the processing and manufacturing of products play a key role in the widespread promotion and application of UHPC prefabricated anti-collision guardrails in later engineering projects, reducing the complexity of the construction process, and saving investment costs.

[0042] From the economic point of view, the anti-collision guardrail structure of this utility model uses about 0.13 cubic meters of UHPC material, 0.05 cubic meters of fine stone concrete, and 45 kg of steel bars for each meter. By comparing the economic efficiency with ordinary cast-in-place concrete guardrails, combined cast-in-place guardrails, and beam-column steel guardrails, the results are shown in the following table:

[0043] Comparison table of prices of various types of anti-collision guardrails

[0044]

[0045] According to the analysis in the table above, the cost of the anti-collision guardrail of this utility model is about 1678 yuan / m, which is slightly more expensive than ordinary cast-in-place concrete guardrails. However, in terms of construction efficiency, prefabricated structures can save a lot of construction time compared to on-site casting. Compared with combined guardrails and steel guardrails, the anti-collision guardrail of this utility model has obvious price advantages and has a large space for promotion and application. At the same time, this product also conforms to the design concept of green environmental protection, and the comprehensive carbon emissions can be reduced by more than 50%. At the same time, it can further promote the process of bridge assembly and industrialization, and also has good social value.

[0046] It should be understood that the crash barrier of the utility model is a prefabricated UHPC crash barrier. For the structural form of the prefabricated shell 1, the designs of different lattice shells are similar, but the forces are slightly different. Although they are all based on the shell + rib mode, the arrangement of the ribs and the connection method with the bridge deck are not the same. Other structural arrangements that adjust the arrangement of the vertical partition 2 and improve the connection method of the bridge deck also fall within the foreseeable scope of the utility model.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A crash barrier, characterized in that: include: A prefabricated shell (1), wherein the shell wall of the prefabricated shell (1) is cast by ultra-high performance concrete, a cavity is formed inside the prefabricated shell (1), and a vertical partition (2) is arranged in the cavity; A connecting column (3) is located in the cavity of the prefabricated shell (1), and the prefabricated shell (1) is fixed by means of the connecting column (3).

2. The anti-collision guardrail according to claim 1, characterized in that: The wall thickness of the prefabricated shell (1) is 3 to 5 cm. A steel mesh (4) is arranged inside the wall of the prefabricated shell (1), and is suitable for forming the wall of the prefabricated shell (1) by combining ultra-high performance concrete with the steel mesh (4) for casting.

3. The anti-collision guardrail according to claim 1, characterized in that: There are a plurality of vertical partitions (2) in the cavity of the prefabricated shell (1), and the plurality of vertical partitions (2) are arranged in parallel along the length direction of the prefabricated shell (1). Among the plurality of vertical partitions (2), at least two groups of two adjacent vertical partitions (2) are enclosed with the prefabricated shell (1) to form a connection column casting cavity, and the connection column casting cavity is combined with casting fine stone concrete and embedded steel bars to form the connection column (3).

4. The anti-collision guardrail according to claim 3, characterized in that: The upper part of the vertical partition (2) is provided with a through hole (5), and both ends of the prefabricated shell (1) are provided with cable laying holes at positions flush with the through hole (5), and the cable laying holes and the through hole (5) form a cable facility laying channel in the upper part of the cavity of the prefabricated shell (1).

5. The anti-collision guardrail according to claim 4, characterized in that: A hand hole well (6) is provided on the prefabricated shell (1) at a position corresponding to the cable facility laying channel.

6. The anti-collision guardrail according to claim 1, characterized in that: The two ends of the top of the prefabricated shell (1) are provided with a socket structure, the socket structure comprising a socket male buckle (7) located at one end of the top of the prefabricated shell (1) and a socket female buckle (8) located at the other end of the top of the prefabricated shell (1), the socket male buckle (7) and the socket female buckle (8) can be socket-fitted to realize the prefabrication and assembly of two anti-collision guardrails.

7. The anti-collision guardrail according to claim 6, characterized in that: The socket male buckle (7) comprises a male buckle transverse portion (71) and a male buckle sinking portion (72) located at one end of the male buckle transverse portion (71), a sinking receiving platform is formed on the male buckle sinking portion (72), and the end of the male buckle sinking portion (72) is flush with the end of the prefabricated shell (1); The socket-and-spigot female buckle (8) comprises a female buckle transverse portion (81), the upper surface of the female buckle transverse portion (81) is flush with the upper surface of the male buckle transverse portion (71), the lower surface of the female buckle transverse portion (81) is flush with the sinking receiving platform of the male buckle sinking portion (72), the female buckle transverse portion (81) exceeds the end of the prefabricated shell (1), and the exceeding portion is consistent in size with the sinking receiving platform of the male buckle sinking portion (72).

8. The anti-collision guardrail according to any one of claims 1 to 7, characterized in that: The prefabricated shell (1) has a length of 180 to 220 cm, a height of 80 to 100 cm, and a thickness of 40 to 55 cm. The vertical partitions (2) are arranged in the internal cavity of the prefabricated shell (1) at intervals of 35 to 40 cm along the length direction of the prefabricated shell (1).

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