Subgrade middle zoning prefabricated concrete guardrail

Abstract

The utility model provides a subgrade zoning prefabricated assembly type concrete guardrail which comprises a prefabricated concrete base, a prefabricated concrete guardrail body and a site construction module, an inserting groove is reserved in the lower portion of the prefabricated concrete base, and the inserting groove is connected with an inserting rib reserved on a subgrade; the prefabricated concrete guardrail bodies and the prefabricated concrete base are integrally formed, embedded parts and embedded hoisting parts are arranged on the faces, back to a vehicle, of the prefabricated concrete guardrail bodies, and the adjacent prefabricated concrete guardrail bodies are detachably connected. The site construction module is located on the vehicle back face of the prefabricated concrete base and the prefabricated concrete guardrail body, and the height of the site construction module is close to the sum of the height of the prefabricated concrete base and the height of the prefabricated concrete guardrail body. The prefabricated concrete base and the roadbed are connected through joint bars in a built-in mode, the construction efficiency is guaranteed while the connection strength is guaranteed, the prefabricated concrete guardrail is fixed in a bolt opposite-pulling mode, and the longitudinal overall stability of the prefabricated concrete guardrail is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of concrete guardrails, in particular to a prefabricated assembled concrete guardrail in a roadbed center zone. Background Art

[0002] Guardrails are required in the median strip of the roadbed to prevent vehicles from running off the original road and rushing to the other side, reduce the probability of accidents, and ensure driving safety. Most of the existing concrete guardrails in the median strip of the roadbed are cast-in-place. When cast-in-place technology is used for construction, raw materials, equipment and other items need to be piled up on site, resulting in a chaotic site, and the quality of the concrete guardrail cannot be guaranteed.

[0003] Although a small number of them use prefabricated concrete structures, they often have problems such as low protection level, poor landscape and permeability, complex construction and high cost. In addition, the existing prefabricated concrete guardrails are inconvenient to install during construction, resulting in slow construction speed and low construction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a prefabricated assembled concrete guardrail in the center of the roadbed. The prefabricated concrete base and the roadbed are connected by inserted reinforcement and embedded connection, which ensures the connection strength while also ensuring the construction efficiency. The adjacent prefabricated concrete guardrail bodies are fixed by bolt tensioning to ensure the overall longitudinal stability of the assembled concrete guardrail.

[0005] The technical solution to achieve the purpose of this utility model is as follows:

[0006] The utility model provides a prefabricated assembled concrete guardrail in the middle of a roadbed, comprising:

[0007] A precast concrete base, wherein a slot is reserved at the bottom of the precast concrete base, and the slot is connected to a dowel bar reserved on the roadbed;

[0008] Precast concrete guardrail body, the precast concrete guardrail body and the precast concrete base are integrally formed during the precast process in the precast area, the back surface of the precast concrete guardrail body is provided with embedded parts and embedded hanging parts, and adjacent precast concrete guardrail bodies are detachably connected;

[0009] An on-site construction module is located at the rear side of the precast concrete base and the precast concrete guardrail body, and the height of the on-site construction module is close to the sum of the height of the precast concrete base and the height of the precast concrete guardrail body.

[0010] As a further limitation of the present utility model, each group of embedded parts of adjacent precast concrete guardrail bodies are fixedly connected in a tensioning manner to achieve relative fixation of adjacent precast concrete guardrail bodies.

[0011] As a further limitation of the present utility model, the width of the precast concrete base is greater than the width of the precast concrete guardrail body.

[0012] As a further limitation of the present utility model, the on-site construction module includes:

[0013] A cast-in-place plain concrete layer, which is arranged between adjacent precast concrete guardrail bodies;

[0014] A sand filling layer, which is located above the cast-in-place plain concrete layer;

[0015] An anti-filter geotextile, which is located above the sand filling layer;

[0016] A compacted soil filling layer, which is located above the anti-filter geotextile.

[0017] As a further limitation of the present utility model, the sum of the heights of the cast-in-place plain concrete layer, the sand filling layer, the anti-filter geotextile, and the compacted soil filling layer is close to the sum of the heights of the precast concrete base and the precast concrete guardrail body.

[0018] As a further limitation of the present utility model, the height of the cast-in-place plain concrete layer is less than the height of the precast concrete base, and the upper surface of the sand filling layer extends beyond the upper surface of the precast concrete base;

[0019] The height of the anti-filter geotextile exceeds half of the height of the precast concrete guardrail body, and the upper surface of the compacted soil filling layer is close to the upper surface of the precast concrete guardrail body.

[0020] As a further limitation of the present utility model, a drain pipe is embedded in the precast concrete base.

[0021] As a further limitation of the present utility model, communication holes are arranged in the sand filling layer.

[0022] As a further limitation of the present utility model, a steel mesh structure is arranged on the upper part of the compacted soil filling layer.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] 1. The precast concrete base of the present utility model is connected to the roadbed by inserting steel bars and in an embedded manner, ensuring the connection strength while also guaranteeing the construction efficiency.

[0025] 2. Between adjacent precast concrete guardrail bodies of the present utility model, a bolt tensioning method is adopted to ensure the overall longitudinal stability of the assembled concrete guardrail.

[0026] 3. A guardrail net with a steel mesh structure is arranged at the top of the assembled concrete guardrail of the present utility model, which can not only relieve the visual fatigue of drivers caused by long-term driving, but also intercept high-altitude objects such as those accidentally dropped by trucks, preventing them from entering the oncoming lane and causing major hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a transverse sectional view of a precast assembled concrete guardrail for the median strip of a roadbed provided by the present utility model;

[0028] Figure 2 It is a longitudinal sectional view of a precast assembled concrete guardrail for the median strip of a roadbed provided by the present utility model;

[0029] Figure 3 It is an inside view of the back of a vehicle surface of a precast assembled concrete guardrail for the median strip of a roadbed provided by the present utility model;

[0030] Figure 4 It is a reinforcement drawing of a precast assembled concrete guardrail for the median strip of a roadbed provided by the present utility model;

[0031] Reference numerals: 1 - roadbed; 2 - drain pipe; 3 - precast concrete guardrail body; 4 - embedded bolt; 5 - compacted fill layer; 6 - geotextile filter; 7 - communication hole; 8 - cast-in-place plain concrete layer; 9 - steel mesh structure; 10 - assembled concrete guardrail; 11 - steel mesh; 12 - bolt; 13 - column; 14 - steel plate; 16 - embedded part; 17 - embedded lifting part; 18 - inserted bar; 19 - concrete guardrail construction reinforcement; 20 - sand filling layer; 21 - precast concrete base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present utility model will be described in detail below with reference to the embodiments shown in the drawings. However, it should be noted that these embodiments do not limit the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0033] Please refer to Figure 1 and Figure 3, an embodiment of the present utility model provides a prefabricated and assembled concrete guardrail for the median strip of a roadbed, including a precast concrete base 21, a precast concrete guardrail body 3, and a on-site construction module. A slot is reserved at the lower part of the precast concrete base 21, and the slot is connected to the inserted steel bars 18 reserved on the roadbed 1; the precast concrete guardrail body 3 and the precast concrete base 21 are integrally formed during the prefabrication process in the prefabrication area. Embedded parts 16 and embedded lifting parts 17 are arranged on the vehicle-facing back surface of the precast concrete guardrail body 3, and adjacent precast concrete guardrail bodies 3 are detachably connected; the on-site construction module is located on the vehicle-facing back surface of the precast concrete base 21 and the precast concrete guardrail body 3, and the height of the on-site construction module is close to the sum of the height of the precast concrete base 21 and the height of the precast concrete guardrail body 3.

[0034] Please refer to Figure 4 , steel bars are arranged inside the precast concrete guardrail body 3 in the embodiment of the present utility model to enhance the strength of the assembled concrete guardrail 10 and improve its impact resistance. Preferably, the embedded part 16 in the embodiment of the present utility model is an embedded bolt, and the embedded lifting part 17 is an embedded iron ring. The embedded bolt is arranged on the vehicle-facing back surface of the upper part of the assembled concrete guardrail 10, and an embedded iron ring is arranged at the lower part of the embedded bolt, so as to facilitate the installation of the assembled concrete guardrail 10 by a crane. Bolts between adjacent assembled concrete guardrails 10 adopt the method of bolt tensioning to strengthen the overall stability in the longitudinal direction of the assembled concrete guardrail 10.

[0035] The precast concrete base 21 and the roadbed 1 in the embodiment of the present utility model adopt inserted steel bars 18 and embedded connection, which ensures the connection strength and construction efficiency at the same time. In practical applications, preferably, a steel bar slot is reserved at the lower part of the precast concrete base 21 in the embodiment of the present utility model and is connected to the inserted steel bars 18 reserved on the roadbed 1 to realize the connection between the assembled concrete guardrail 10 and the roadbed 1.

[0036] Furthermore, preferably, the groups of embedded parts 16 of adjacent precast concrete guardrail bodies 3 in the embodiment of the present utility model are fixedly connected by tensioning to realize the relative fixation of adjacent precast concrete guardrail bodies 3.

[0037] Please continue to refer to Figure 1 , the width of the precast concrete base 21 in the embodiment of the present utility model is greater than the width of the precast concrete guardrail body 3.

[0038] Please continue to refer to Figure 1, the on-site construction module of the embodiment of the present utility model includes a cast-in-place plain concrete layer 8, a sand filling layer 20, an anti-filter geotextile 6, and a compacted soil layer 5. The cast-in-place plain concrete layer 8 is arranged between adjacent precast concrete guardrail bodies 3; the sand filling layer 20 is located above the cast-in-place plain concrete layer 8; the anti-filter geotextile 6 is located above the sand filling layer 20; the compacted soil layer 5 is located above the anti-filter geotextile 6. The sum of the heights of the cast-in-place plain concrete layer 8, the sand filling layer 20, the anti-filter geotextile 6, and the compacted soil layer 5 is close to the sum of the heights of the precast concrete base 21 and the precast concrete guardrail body 3.

[0039] In the embodiment of the present utility model, cast-in-place plain concrete is arranged between the back vehicle surfaces of the assembled concrete guardrail 10, and a sand filling layer 20 is arranged above the cast-in-place plain concrete. Please continue to refer to Figure 1 , preferably, a communication hole 7 is arranged in the sand filling layer 20 of the embodiment of the present utility model. An anti-filter geotextile 6 is arranged above the sand filling layer 20, and the upper surface of the anti-filter geotextile 6 is a compacted soil layer 5. Preferably, a steel mesh structure 9 is arranged above the compacted soil layer 5.

[0040] Please refer to Figure 2 , the steel mesh structure 9 of the embodiment of the present utility model includes columns 13, steel plates 14, bolts 12, and steel meshes 11. The columns 13 are located between the steel meshes 11. The steel plates 14 connect the steel meshes 11 and the columns 13 through bolts 12, and the columns 13 are fixedly connected to the assembled concrete guardrail 10. A guard net of the steel mesh structure 9 is arranged at the top of the assembled concrete guardrail 10 in the embodiment of the present utility model, which can not only relieve the visual fatigue of the driver caused by long-term driving, but also block the high-altitude objects accidentally generated by trucks and prevent them from entering the oncoming lane and causing major hazards.

[0041] Please continue to refer to Figure 1 , in the embodiment of the present utility model, the height of the cast-in-place plain concrete layer 8 is less than the height of the precast concrete base 21, and the upper surface of the sand filling layer 20 exceeds the upper surface of the precast concrete base 21; the height of the anti-filter geotextile 6 exceeds half of the height of the precast concrete guardrail body 3, and the upper surface of the compacted soil layer 5 is close to the upper surface of the precast concrete guardrail body 3.

[0042] Please continue to refer to Figure 1 and Figure 3 , a drain pipe 2 is embedded in the precast concrete base 21 in the embodiment of the present utility model. Preferably, the drain pipe 2 of the embodiment of the present utility model is a drain pipe 2 made of plastic material, and the drain pipe 2 made of plastic material is precast in the precast concrete base 21.

[0043] A precast and assembled concrete guardrail for the median strip of a roadbed according to an embodiment of the present utility model. Before the installation of the precast and assembled concrete guardrail 10, the precast concrete guardrail body 3, the embedded parts 16, the embedded lifting parts 17 and the drain pipes 2 have all been precast in the factory. The two steel meshes, columns and steel plates of the steel mesh structure 9 have also been precast in the factory. The cast-in-place plain concrete layer 8 has been cast and cured.

[0044] During the construction of the precast and assembled concrete guardrail for the median strip of a roadbed according to an embodiment of the present utility model, a crane is used to lift the precast concrete guardrail body 3 above the inserted steel bars 18, and the reserved holes of the precast concrete base 21 are aligned with the inserted steel bars 18, and then the precast concrete guardrail body 3 is lowered to complete the lifting. Then, the sand filling layer 20 is constructed. A layer of filter geotextile 6 is laid above the sand filling layer 20, and the compacted soil layer 5 is filled on the filter geotextile 6. Finally, the steel mesh structure 9 is assembled and installed on the compacted soil layer 5. Thus, the installation work of a precast and assembled concrete guardrail for the median strip of a roadbed is all completed.

[0045] The precast concrete base 21 according to an embodiment of the present utility model and the roadbed 1 are connected by inserted steel bars 18 and an embedded connection method, which ensures the connection strength and the construction efficiency at the same time. The adjacent precast concrete guardrail bodies 3 according to an embodiment of the present utility model are fixed by a bolt tensioning method to ensure the longitudinal overall stability of the precast and assembled concrete guardrail 10.

[0046] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present utility model, and they are not used to limit the protection scope of the present utility model. Any equivalent implementation manners or changes made without departing from the technical spirit of the present utility model should be included in the protection scope of the present utility model.

[0047] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0048] In addition, it should be understood that although this specification is described according to the implementation manners, not every implementation manner only contains an independent technical solution. The narrative manner of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. A prefabricated concrete guardrail in the middle of a roadbed, characterized in that: include: A precast concrete base, wherein a slot is reserved at the bottom of the precast concrete base, and the slot is connected to a dowel bar reserved on the roadbed; Precast concrete guardrail body, the precast concrete guardrail body and the precast concrete base are integrally formed during the precast process in the precast area, the back surface of the precast concrete guardrail body is provided with embedded parts and embedded hanging parts, and adjacent precast concrete guardrail bodies are detachably connected; An on-site construction module is located at the rear side of the precast concrete base and the precast concrete guardrail body, and the height of the on-site construction module is close to the sum of the height of the precast concrete base and the height of the precast concrete guardrail body.

2. A prefabricated assembled concrete guardrail in the middle of a roadbed according to claim 1, characterized in that: Each group of embedded parts of adjacent precast concrete guardrail bodies is fixedly connected by pulling, so as to achieve relative fixation of adjacent precast concrete guardrail bodies.

3. The prefabricated assembled concrete guardrail in the middle of the roadbed according to claim 1 is characterized in that: The width of the precast concrete base is greater than the width of the precast concrete guardrail body.

4. A prefabricated assembled concrete guardrail in the center of a roadbed according to any one of claims 1 to 3, characterized in that: The on-site construction module includes: A cast-in-place plain concrete layer, wherein the cast-in-place plain concrete layer is disposed between adjacent precast concrete guardrail bodies; A sand filling layer, wherein the sand filling layer is located on the upper part of the cast-in-place plain concrete layer; A filter geotextile, wherein the filter geotextile is located on the upper part of the sand filling layer; A compacted fill layer is located on the upper part of the anti-filter geotextile.

5. The prefabricated assembled concrete guardrail in the center of the roadbed according to claim 4 is characterized in that: The sum of the heights of the cast-in-place plain concrete layer, the sand filling layer, the anti-filter geotextile and the compacted fill layer is close to the sum of the heights of the precast concrete base and the precast concrete guardrail body.

6. The prefabricated assembled concrete guardrail in the middle of the roadbed according to claim 4, characterized in that: The height of the cast-in-place plain concrete layer is less than the height of the precast concrete base, and the upper surface of the sand filling layer exceeds the upper surface of the precast concrete base; The height of the anti-filter geotextile exceeds 1 / 2 of the height of the precast concrete guardrail body, and the upper surface of the compacted fill layer is close to the upper surface of the precast concrete guardrail body.

7. The prefabricated assembled concrete guardrail in the center of the roadbed according to claim 1 is characterized in that: A drainage pipe is pre-buried in the precast concrete base.

8. The prefabricated assembled concrete guardrail in the median strip of roadbed according to claim 4, characterized in that: A communication hole is arranged in the sand filling layer.

9. The prefabricated assembled concrete guardrail in the median strip of roadbed according to claim 4, characterized in that: A steel mesh structure is arranged on the upper part of the compacted fill layer.

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