A connecting structure for a concrete crash barrier and a concrete crash barrier

Abstract

The utility model discloses a kind of connecting structure and concrete crash barrier for concrete crash barrier;Among them, connecting structure includes: grouting cylinder and at least two connecting plates, grouting cylinder is hollowly arranged, and the upper end of grouting cylinder is formed with grouting mouth;Each connecting plate one end is fixed on grouting cylinder, the other end extends along the radial direction of grouting cylinder, each connecting plate is configured to be able to be inserted into adjacent reserved slot respectively;Formed with overflow grout cavity extending along its length direction in each connecting plate, at least one overflow grout mouth is formed on each connecting plate respectively, overflow grout mouth is communicated with overflow grout cavity, overflow grout cavity is communicated with grouting cylinder;By grouting cylinder, connecting plate and reserved slot cooperation, it can be realized to the adjacent two prefabricated crash barrier body between fast, sufficient grouting connection, not restricted by the size of gap, filling full, reduce quality problem, reduce operation difficulty and production cost, improve work efficiency and the connecting strength and safety protection performance of crash barrier.

Description

Technical Field

[0001] This utility model relates to the field of concrete crash barrier technology, and in particular to a connecting structure for concrete crash barriers and a concrete crash barrier. Background Technology

[0002] In highway construction projects, concrete crash barriers are common safety facilities for vehicles. They can be installed on both sides of the road to provide lateral protection and prevent vehicles from veering off the road and causing serious accidents; they can also be placed in the middle of the road to distinguish between the left and right lanes, while also ensuring traffic safety. However, due to the large weight of concrete crash barriers, they are usually prefabricated in sections for ease of transportation and installation. During hoisting and installation, connecting structures are used to tightly connect adjacent prefabricated concrete crash barriers into a whole to ensure that they can fully perform their safety protection function.

[0003] Traditional precast concrete crash barrier connection structures require pre-embedded channel steel at the ends of the precast concrete crash barriers before installation. During installation, I-beams are inserted into the channel steel at the connection point of two adjacent precast concrete crash barriers, and then concrete is poured to fill the gap between the channel steel and the I-beam. The traditional connection structure has several drawbacks: firstly, it significantly increases steel consumption and construction costs; secondly, the narrow gap between the channel steel and the I-beam makes it difficult for the concrete mortar to fully fill the gap during pouring, easily leading to voids and instability at the connection point, affecting the overall connection strength of the guardrail and reducing its safety performance; furthermore, the limited space makes it difficult to fully vibrate and compact the concrete mortar during pouring, resulting in high operational difficulty and low construction efficiency, failing to meet the demands of rapid and efficient highway construction. Utility Model Content

[0004] The purpose of this utility model is to provide a connection structure for concrete crash barriers and a concrete crash barrier, so as to solve the problems of existing precast concrete crash barrier connection structures, such as large steel consumption, high cost, narrow gaps between channel steel and I-beams, high operation difficulty, low construction efficiency, and easy formation of voids in the poured concrete, which affect the connection strength and safety protection performance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A connecting structure for concrete crash barriers, wherein the connecting structure is disposed between two adjacent prefabricated crash barrier bodies, wherein the ends of the prefabricated crash barrier bodies are formed with reserved grooves, and the connecting structure includes:

[0007] The grouting cylinder and at least two connecting plates are provided. The grouting cylinder is hollow and has a grouting port at its upper end. One end of each connecting plate is fixed to the grouting cylinder, and the other end extends radially along the grouting cylinder. Each connecting plate is configured to be inserted into an adjacent pre-reserved groove. Each connecting plate has an overflow cavity extending along its length. Each connecting plate has at least one overflow port, which communicates with the overflow cavity, and the overflow cavity communicates with the grouting cylinder.

[0008] Based on the aforementioned technical means, by using a hollow grouting cylinder and a connecting plate that interlocks with the pre-reserved groove, two adjacent prefabricated crash barrier bodies can be easily and quickly spliced ​​together. Furthermore, the overflow cavity of the connecting plate is connected to the hollow cavity of the grouting cylinder, forming a grouting channel with the cooperation of the overflow port and the grouting port. This allows for rapid and thorough grouting connection between two adjacent prefabricated crash barrier bodies. When the connecting plate is inserted into the pre-reserved groove and, with the cooperation of the grouting channel, concrete mortar is pressurized and injected into the pre-reserved groove, there are no limitations based on the size of the gaps. This allows the concrete mortar to fully fill the gaps, ensuring a full filling and preventing quality issues such as voids and instability. It also reduces operational difficulties caused by insufficient mortar compaction, improves work efficiency, enhances the integrity and stability of the connection structure, and improves the connection strength and safety performance of the crash barrier. Furthermore, compared to traditional connection structures, it eliminates the need for pre-embedded steel channels within the precast crash barrier body and the use of I-beams for connection, reducing steel consumption, lowering production costs, and meeting the needs of rapid and efficient construction in highway engineering.

[0009] Furthermore, the grouting cylinder includes a hollow inner cylinder and an outer cylinder, which are coaxially arranged and form an annular cavity between them. Each of the connecting plates is fixed on the outer cylinder, and the overflow cavity is connected to the annular cavity. An overflow hole is formed on the side wall of the inner cylinder, which is connected to the annular cavity. The inner cylinder is connected to the grouting port.

[0010] Based on the aforementioned technical means, a double-layered grouting cylinder is formed by an inner and outer cylinder arranged coaxially. This allows concrete mortar to flow into the annular cavity through the overflow hole in the inner cylinder, and then be evenly dispersed to the overflow cavities of each connecting plate. This results in more thorough and uniform grouting, effectively avoiding dead zones between the reserved grooves and the connecting structure, improving connection quality and firmness, enhancing the integrity and stability of the connection between adjacent prefabricated guardrail bodies, and improving the reliability and durability of the connecting structure. Specifically, during construction, the connecting structure is inserted into two reserved grooves, and concrete mortar is quickly and precisely injected into the hollow cavity of the inner cylinder through the grouting port under pressure. The concrete mortar is evenly dispersed in the annular cavity through the overflow hole and flows through the overflow cavity, finally flowing out through the overflow port to fully fill the gap between the reserved grooves and the connecting structure. This achieves more thorough and uniform grouting, significantly enhancing the connection strength and overall stability between adjacent prefabricated guardrail bodies, and improving the reliability and safety of the guardrail.

[0011] Furthermore, the number of overflow holes is two or more, and each overflow hole is evenly distributed along the axial and circumferential directions of the inner cylinder.

[0012] Based on the above-mentioned technical means, by setting two or more overflow holes that are evenly distributed along the axial and circumferential directions of the inner cylinder, the concrete mortar can flow more evenly, quickly and comprehensively from the inner cylinder into the annular cavity, and then more smoothly into the overflow cavities of each connecting plate. This avoids insufficient local grouting or uneven grout distribution, greatly enhances the tightness and integrity of the connection between adjacent precast crash barrier bodies, and improves the quality stability of the entire connection structure and the safety of the crash barrier in use.

[0013] Furthermore, a fixing plate is connected between the inner cylinder and the outer cylinder.

[0014] Based on the above technical means, by connecting a fixing plate between the inner and outer cylinders, the overall stability and structural strength of the double-layer structure of the grouting cylinder are enhanced, preventing relative displacement or deformation of the inner and outer cylinders due to factors such as grout pressure during the grouting process. This ensures the stability and reliability of the grouting operation and improves the quality and construction efficiency of the connection between adjacent prefabricated guardrail bodies.

[0015] Furthermore, the number of fixing plates is two or more, and each fixing plate is evenly distributed along the circumference of the grouting cylinder.

[0016] Based on the above-mentioned technical means, by setting two or more fixing plates, the inner cylinder and outer cylinder can be stably connected and supported from multiple directions, further enhancing the overall rigidity and deformation resistance of the grouting cylinder.

[0017] Furthermore, at least one protrusion structure is formed on the connecting plate, and each protrusion structure is formed with a through hole that communicates with the corresponding overflow port.

[0018] Based on the aforementioned technical means, by setting at least one protruding structure connected to the overflow port on the connecting plate, on the one hand, the protruding structure can increase the contact area and friction between the connecting plate and the reserved groove, thereby improving the connection stability; on the other hand, during grouting, the through holes on the protruding structure connected to the overflow port can more accurately and smoothly guide the concrete mortar to fill the gap between the reserved groove and the connecting structure, enhancing the fullness and density of the grouting, avoiding quality defects such as grouting voids in the filling gaps, and further improving the overall strength and reliability of the connection between adjacent prefabricated anti-collision guardrail bodies.

[0019] Furthermore, there are four connecting plates, and each connecting plate is evenly distributed along the circumference of the grouting cylinder.

[0020] Based on the above technical means, by setting four connecting plates, the force on the connecting structure can be more balanced, which improves the stability and reliability of the overall connection. The symmetrical layout allows the concrete mortar to be evenly distributed to each connecting part, ensuring the consistency of grouting quality and providing more stable and safe support for the crash barrier.

[0021] Furthermore, the cross-section of the reserved groove is trapezoidal.

[0022] According to the above technical means, the opening at the end of the trapezoidal structure closer to the grouting cylinder is smaller than the opening at the end farther away from the grouting cylinder. By designing the reserved groove as a structure with a trapezoidal cross-section, the contact area between the connecting plate and the reserved groove gradually increases along the extension direction of the connecting plate after the connecting plate is inserted into the reserved groove. This increases the friction and interlocking force between the connecting plate and the reserved groove, which can prevent the connecting plate from separating from the reserved groove when two adjacent anti-collision guardrail bodies move away from each other. This enhances the stability and reliability of the connection between the anti-collision guardrail bodies and improves the overall safety performance of the anti-collision guardrail.

[0023] Furthermore, the grouting cylinder and each of the connecting plates are integrally formed.

[0024] Based on the above-mentioned technical means, the grouting cylinder and each connecting plate are integrally molded, which simplifies the production process, improves the strength and rigidity of the entire connection structure, ensures the stability and reliability of the connection between adjacent prefabricated guardrail bodies, and enhances the overall safety and durability of the guardrail.

[0025] This utility model also protects a concrete crash barrier, comprising at least two prefabricated crash barrier bodies, with adjacent prefabricated crash barrier bodies connected by the aforementioned connecting structure.

[0026] Based on the above-mentioned technical means, during the assembly and construction of concrete crash barriers, a connecting structure is used to connect two adjacent prefabricated crash barrier bodies, making the overall connection of the concrete crash barriers more stable and reliable. This results in high construction efficiency, low cost, and improved quality stability, safety, and durability of the concrete crash barriers, providing a more reliable guarantee for road traffic safety.

[0027] The beneficial effects achieved by this utility model are:

[0028] This invention utilizes a hollow grouting cylinder and a connecting plate that interlocks with a pre-reserved slot, enabling easy and quick assembly of two adjacent prefabricated crash barrier bodies. The overflow cavity of the connecting plate connects to the hollow cavity of the grouting cylinder, forming a grouting channel with the overflow port and grouting port. This allows for rapid and thorough grouting connection between the two adjacent prefabricated crash barrier bodies. Furthermore, the connection plate, inserted into the pre-reserved slot, allows for pressurized filling of concrete mortar into the slot without being limited by the size of any gaps. This allows the concrete mortar to fully fill all the gaps, ensuring a full filling and preventing quality issues such as voids and instability. It also reduces operational difficulties caused by insufficient mortar compaction, improves work efficiency, enhances the integrity and stability of the connection structure, and improves the connection strength and safety performance of the crash barrier. Furthermore, compared to traditional connection structures, it eliminates the need for pre-embedded steel channels within the precast crash barrier body and the use of I-beams for connection, reducing steel consumption, lowering production costs, and meeting the needs of rapid and efficient construction in highway engineering. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the connection structure of this utility model connecting two adjacent prefabricated anti-collision guardrail bodies;

[0030] Figure 2 This is a top view of the overall connecting structure of this utility model;

[0031] Figure 3 This utility model Figure 2 Sectional view of AA.

[0032] Among them, 1-prefabricated anti-collision guardrail body; 11-reserved groove; 2-grouting cylinder; 21-grouting port; 22-inner cylinder; 221-overflow hole; 23-outer cylinder; 24-annular cavity; 25-fixing plate; 3-connecting plate; 31-overflow cavity; 32-overflow port; 33-protruding structure.

[0033] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0036] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0037] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0038] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0041] Example 1

[0042] This embodiment relates to a connecting structure for concrete crash barriers, such as... Figure 1 As shown, the connecting structure is set between two adjacent prefabricated guardrail bodies 1, and the ends of the prefabricated guardrail bodies 1 are formed with reserved grooves 11, such as... Figure 2 As shown, the connection structure includes: a grouting cylinder 2 and at least two connecting plates 3. The grouting cylinder 2 is hollow and has a grouting port 21 at its upper end. One end of each connecting plate 3 is fixed to the grouting cylinder 2, and the other end extends radially along the grouting cylinder 2. Each connecting plate 3 is configured to be inserted into adjacent reserved slots 11. Each connecting plate 3 has an overflow cavity 31 extending along its length direction. Each connecting plate 3 has at least one overflow port 32, which is connected to the overflow cavity 31. The overflow cavity 31 is connected to the grouting cylinder 2.

[0043] In this embodiment, the hollow grouting cylinder 2 and the connecting plate 3 are inserted into the reserved groove 11, enabling easy and quick splicing of two adjacent prefabricated crash barrier bodies 1. The overflow cavity 31 of the connecting plate 3 is connected to the hollow cavity of the grouting cylinder 2, forming a grouting channel with the cooperation of the overflow port 32 and the grouting port 21. This allows for grouting connection between two adjacent prefabricated crash barrier bodies 1. When the connecting plate 3 is inserted into the reserved groove 11 and, with the cooperation of the grouting channel, concrete mortar is pressurized and injected into the reserved groove 11 without being limited by the size of the gaps. This ensures that the concrete mortar fully fills the entire gap, resulting in a full filling, avoiding voids and instability, reducing operational difficulties caused by insufficient mortar compaction, improving work efficiency, enhancing the integrity and stability of the connection structure, and improving the connection strength and safety performance of the crash barrier. Furthermore, compared to traditional connection structures, it eliminates the need for pre-embedded steel channels within the prefabricated guardrail body 1 and the use of I-beams for connection, reducing steel consumption, lowering production costs, and meeting the demands of rapid and efficient highway construction. Specifically, during construction, the reserved slots 11 at the ends of two adjacent prefabricated guardrail bodies 1 are aligned, and then the connection structure is inserted into the two reserved slots 11, so that each connecting plate 3 is inserted into the corresponding reserved slot 11, thus initially connecting the two adjacent prefabricated guardrail bodies 1. Subsequently, concrete mortar is quickly and precisely injected into the hollow cavity of the grouting cylinder 2 through the grouting port 21. The concrete mortar flows through the overflow cavity 31 and fully fills the gap between the reserved slot 11 and the connection structure through the overflow port 32, making the connection structure firmly connected to the two adjacent prefabricated guardrail bodies 1, thus tightly and firmly connecting the two adjacent prefabricated guardrail bodies 1.

[0044] Furthermore, as a preferred embodiment of this example, there are four connecting plates 3, and each connecting plate 3 is evenly distributed along the circumference of the grouting cylinder 2; the cross-section of the reserved groove 11 is trapezoidal; the grouting cylinder 2 and each connecting plate 3 are integrally formed.

[0045] This embodiment, by setting four connecting plates 3, enables a more balanced stress distribution on the connection structure, improving the overall stability and reliability of the connection. The symmetrical layout allows the concrete mortar to spread evenly to each connection point, ensuring consistent grouting quality and providing a more stable and safer support for the crash barrier. The trapezoidal structure has a smaller opening at the end closest to the grouting cylinder 2 than at the end furthest from it. By designing the pre-reserved groove 11 with a trapezoidal cross-section, the contact area between the connecting plate 3 and the pre-reserved groove 11 gradually increases along the extension direction of the connecting plate 3 after insertion. The increased size increases the friction and engagement force between the connecting plate 3 and the reserved groove 11, preventing the connecting plate 3 from detaching from the reserved groove 11 when two adjacent prefabricated guardrail bodies 1 move away from each other. This enhances the stability and reliability of the connection between the prefabricated guardrail bodies 1 and improves the overall safety performance of the guardrail. The grouting cylinder 2 and each connecting plate 3 are integrally formed, simplifying the production process, improving the strength and rigidity of the entire connection structure, ensuring the stability and reliability of the connection between adjacent prefabricated guardrail bodies 1, and improving the overall safety and durability of the guardrail.

[0046] like Figure 2 and Figure 3 As shown, in this embodiment, the grouting cylinder 2 includes a hollow inner cylinder 22 and an outer cylinder 23. The inner cylinder 22 and the outer cylinder 23 are coaxially arranged, and an annular cavity 24 is formed between the inner cylinder 22 and the outer cylinder 23. Each connecting plate 3 is fixed on the outer cylinder 23, and the overflow cavity 31 is connected to the annular cavity 24. An overflow hole 221 connected to the annular cavity 24 is formed on the side wall of the inner cylinder 22, and the inner cylinder 22 is connected to the grouting port 21.

[0047] In this embodiment, a double-layered grouting cylinder 2 is formed by an inner cylinder 22 and an outer cylinder 23 arranged coaxially. This allows concrete mortar to flow into the annular cavity 24 through the overflow hole 221 in the inner cylinder 22, and then be evenly distributed to the overflow cavities 31 of each connecting plate 3. This results in more thorough and uniform grouting, effectively avoiding dead zones between the pre-reserved groove 11 and the connecting structure, improving connection quality and firmness, enhancing the integrity and stability of the connection between adjacent prefabricated anti-collision guardrail bodies 1, and improving the reliability and durability of the connecting structure. Specifically, during construction, the connecting... The connecting structure is inserted into two pre-reserved slots 11. Concrete mortar is quickly and precisely injected into the hollow cavity of the inner cylinder 22 through the grouting port 21. The concrete mortar is evenly dispersed in the annular cavity 24 through the overflow hole 221 and flows through the overflow cavity 31. Finally, it flows out through the overflow port 32 to fully fill the gap between the pre-reserved slots 11 and the connecting structure. This achieves more thorough and uniform grouting, significantly enhances the connection strength and overall stability between adjacent prefabricated guardrail bodies 1, and improves the reliability and safety of the guardrail.

[0048] Furthermore, in a preferred embodiment of this invention, the number of overflow holes 221 is two or more, and each overflow hole 221 is evenly distributed along the axial and circumferential directions of the inner cylinder 22; for example... Figure 3 As shown, this embodiment, by setting two or more overflow holes 221 that are evenly distributed along the axial and circumferential directions of the inner cylinder 22, enables concrete mortar to flow more evenly, quickly and comprehensively from the inner cylinder 22 into the annular cavity 24, and then more smoothly into the overflow cavities 31 of each connecting plate 3. This avoids insufficient local grouting or uneven grout distribution, greatly enhances the tightness and integrity of the connection between adjacent prefabricated crash barrier bodies 1, and improves the quality stability of the entire connection structure and the safety of the crash barrier in use.

[0049] like Figure 2 and Figure 3 As shown, in this embodiment, a fixing plate 25 is connected between the inner cylinder 22 and the outer cylinder 23. By connecting the fixing plate 25 between the inner cylinder 22 and the outer cylinder 23, this embodiment enhances the overall stability and structural strength of the double-layer structure of the grouting cylinder 2, prevents relative displacement or deformation of the inner cylinder 22 and the outer cylinder 23 due to factors such as grout pressure during the grouting process, ensures the stability and reliability of the grouting operation, and improves the quality and construction efficiency of the connection between adjacent prefabricated anti-collision guardrail bodies 1.

[0050] Furthermore, in a preferred embodiment of this invention, the number of fixing plates 25 is two or more, and each fixing plate 25 is evenly distributed along the circumference of the grouting cylinder 2; for example... Figure 1 As shown, by setting two or more fixing plates 25, the inner cylinder 22 and the outer cylinder 23 can be stably connected and supported from multiple directions, further enhancing the overall rigidity and deformation resistance of the grouting cylinder 2.

[0051] like Figure 2 As shown, in this embodiment, at least one protruding structure 33 is formed on the connecting plate 3, and each protruding structure 33 has a through hole that communicates with the corresponding overflow port 32. In this embodiment, by setting at least one protruding structure 33 that communicates with the overflow port 32 on the connecting plate 3, on the one hand, the protruding structure 33 can increase the contact area and friction between the connecting plate 3 and the reserved groove 11, thereby improving the connection stability; on the other hand, during grouting, the through hole on the protruding structure 33 that communicates with the overflow port 32 can more accurately and smoothly guide the concrete mortar to fill the gap between the reserved groove 11 and the connecting structure, thereby enhancing the fullness and density of the grouting, avoiding quality defects such as grouting voids in the filling gaps, and further improving the overall strength and reliability of the connection between adjacent prefabricated anti-collision guardrail bodies 1.

[0052] Example 2

[0053] A concrete crash barrier includes at least two prefabricated crash barrier bodies 1, with adjacent prefabricated crash barrier bodies 1 connected by the aforementioned connection structure.

[0054] In this embodiment, during the assembly and construction of the concrete crash barrier, a connecting structure is used to connect two adjacent prefabricated crash barrier bodies 1, making the overall connection of the concrete crash barrier more stable and reliable. This results in high construction efficiency, low cost, and improved quality stability, safety, and durability of the concrete crash barrier, providing a more reliable guarantee for road traffic safety.

[0055] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A connecting structure for a concrete crash barrier, wherein the connecting structure is disposed between two adjacent prefabricated crash barrier bodies (1), wherein the ends of the prefabricated crash barrier bodies (1) are formed with reserved grooves (11), characterized in that, The connection structure includes: The grouting cylinder (2) and at least two connecting plates (3) are provided. The grouting cylinder (2) is hollow and has a grouting port (21) at its upper end. One end of each connecting plate (3) is fixed to the grouting cylinder (2) and the other end extends radially along the grouting cylinder (2). Each connecting plate (3) is configured to be inserted into an adjacent reserved groove (11). Each connecting plate (3) has an overflow cavity (31) extending along its length. Each connecting plate (3) has at least one overflow port (32) connected to the overflow cavity (31). The overflow cavity (31) is connected to the grouting cylinder (2).

2. The connecting structure for a concrete crash barrier according to claim 1, characterized in that, The grouting cylinder (2) includes a hollow inner cylinder (22) and an outer cylinder (23). The inner cylinder (22) and the outer cylinder (23) are coaxially arranged, and an annular cavity (24) is formed between the inner cylinder (22) and the outer cylinder (23). Each of the connecting plates (3) is fixed on the outer cylinder (23), and the overflow cavity (31) is connected to the annular cavity (24). An overflow hole (221) is formed on the side wall of the inner cylinder (22) and is connected to the annular cavity (24). The inner cylinder (22) is connected to the grouting port (21).

3. The connecting structure for a concrete crash barrier according to claim 2, characterized in that, The number of overflow holes (221) is two or more, and each of the overflow holes (221) is evenly distributed along the axial and circumferential directions of the inner cylinder (22).

4. The connecting structure for a concrete crash barrier according to claim 2, characterized in that, A fixing plate (25) is connected between the inner cylinder (22) and the outer cylinder (23).

5. The connecting structure for a concrete crash barrier according to claim 4, characterized in that, The number of the fixing plates (25) is two or more, and each fixing plate (25) is evenly distributed along the circumference of the grouting cylinder (2).

6. The connecting structure for a concrete crash barrier according to claim 1, characterized in that, At least one protrusion structure (33) is formed on the connecting plate (3), and each of the protrusion structures (33) has a through hole that communicates with the corresponding overflow port (32).

7. The connecting structure for a concrete crash barrier according to claim 1, characterized in that, The number of connecting plates (3) is four, and each connecting plate (3) is evenly distributed along the circumference of the grouting cylinder (2).

8. The connecting structure for a concrete crash barrier according to claim 1, characterized in that, The cross-section of the reserved groove (11) is trapezoidal.

9. A connecting structure for a concrete crash barrier according to claim 4, characterized in that, The grouting cylinder (2) and each of the connecting plates (3) are integrally formed.

10. A concrete crash barrier, characterized in that, It includes at least two prefabricated crash barrier bodies (1), and two adjacent prefabricated crash barrier bodies (1) are connected by a connection structure as described in any one of claims 1 to 9.

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