Formwork-free central anti-collision guardrail structure prefabricated by pouring concrete in middle

Abstract

The utility model discloses a template-free central anti-collision guardrail structure prefabricated by pouring concrete in the middle. The template-free central anti-collision guardrail structure comprises a beam body, a prefabricated body, a steel reinforcement framework and a middle core body, a first reinforcing steel bar is pre-buried in the beam body; the prefabricated body is made of concrete, the prefabricated body abuts against a beam body, the prefabricated body comprises a base shell and a guardrail body, and a hollowed-out space with a downward opening is formed in the middle of the base shell; the prefabricated body is arranged, the hollowed-out space is formed in the middle of the base shell, after the prefabricated body is hoisted, the steel reinforcement framework can be connected with the first steel reinforcement in a coupling mode, factory prefabrication and on-site rapid hoisting can be achieved, the bridge deck pavement construction procedure is not affected, concrete is secondarily poured into the hollowed-out space through the pouring hole, and the middle core body is formed; and a template is not needed in the construction process, so that the construction progress is greatly accelerated, the efficiency is greatly improved, the pouring quality can be guaranteed, noise and dust residue pollution generated in the construction process can be reduced, and the method is environmentally friendly and can be widely popularized and used.

Description

Technical Field

[0001] This utility model relates to the field of crash barriers, and in particular to a precast central crash barrier structure with formwork-free intermediate concrete pouring. Background Technology

[0002] Crash barriers, as the name suggests, are railings or barriers installed to prevent vehicles or other objects from colliding with and causing injury. These barriers are commonly found on roads, bridges, highways, parking lots, warehouses, airports, ports, and other locations, their primary function being to protect people and property from accidental impacts. In addition to their crash-prevention function, crash barriers also serve a separating function, dividing roads, parking lots, and other areas to ensure smooth and orderly traffic flow. Furthermore, barriers can also act as warnings and guides, using their color, shape, and reflective materials to alert drivers to road conditions and prevent accidents.

[0003] Currently, crash barriers in the center of urban roads or highways are mostly cast-in-place, which has the advantage of reliable anchoring, but suffers from long construction cycles, requires numerous formworks, has low construction efficiency, and makes it difficult to guarantee pouring quality, while also generating noise and dust pollution during construction. Although existing prefabricated crash barriers use bolts and steel structure connections, this structure has problems such as weak impact resistance or complex construction. Furthermore, some prefabricated crash barriers still require formwork and concrete pouring at the outer load-bearing connections, affecting the bridge deck paving progress. Therefore, it is necessary to study a solution to address these problems. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide a precast central crash barrier structure with formwork-free intermediate concrete pouring, which can effectively solve the problems of long construction cycles and low construction efficiency caused by the need for formwork in the construction of existing crash barriers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precast central crash barrier structure without templates and with intermediate concrete pouring includes a beam, a precast body, a steel reinforcement skeleton, and a central core. The beam has a first steel reinforcement embedded in it. The precast body is made of concrete and rests against the beam. The precast body includes a base shell and a guardrail body. The base shell has a downward-facing hollow space in the center. The guardrail body extends upward integrally from the base shell, and a pouring hole is provided on the precast body, communicating with the hollow space. The steel reinforcement skeleton is tied and fixed within the precast body, with a portion of the skeleton located within the hollow space. The skeleton is coupled to the first steel reinforcement. The central core is formed by secondary concrete pouring into the hollow space through the pouring hole. The central core is integrated with the base shell, steel reinforcement skeleton, beam, and first steel reinforcement.

[0007] Preferably, the first reinforcing bar extends upward and into the hollow space, and the first reinforcing bar is ring-shaped. The reinforcing bar skeleton is coupled to the first reinforcing bar through a plurality of longitudinally inserted second reinforcing bars.

[0008] Preferably, the casting hole is located at the center of the top of the guardrail body, and the casting hole extends vertically downward and communicates with the hollow space.

[0009] Preferably, the prefabricated body has connecting slots at both ends.

[0010] Preferably, the beam body includes a main beam top plate, a reinforced concrete layer, a waterproof layer, and an asphalt concrete layer; the precast body rests on the main beam top plate, the first reinforcing bar is embedded in the main beam top plate, the reinforced concrete layer is laid on the surface of the main beam top plate and located on the periphery of the base shell, the waterproof layer is laid on the surface of the reinforced concrete layer and located on the periphery of the base shell, and the asphalt concrete layer is laid on the surface of the waterproof layer and located on the periphery of the base shell.

[0011] Preferably, the thickness of the base shell is 6-8cm.

[0012] Preferably, the length of the prefabricated body is 3-5m.

[0013] Preferably, the first reinforcing bars are multiple longitudinally spaced bars, with a spacing of 100-200mm between adjacent first reinforcing bars, and a diameter of 14-25mm for each first reinforcing bar.

[0014] Preferably, the diameter of the second reinforcing bar is 10-16 mm.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] By setting up a prefabricated body with a hollow space in the middle of the base shell, the steel reinforcement skeleton can be coupled and connected to the first steel reinforcement after the prefabricated body is hoisted. This allows for factory prefabrication and rapid on-site hoisting without affecting the bridge deck paving construction process. In addition, concrete is poured into the hollow space through the pouring hole to form the intermediate core. The construction process does not require the use of formwork, which greatly speeds up the construction progress, greatly improves the efficiency of construction operations, ensures the quality of pouring, and reduces noise and dust pollution generated during construction. It is green and environmentally friendly and can be widely promoted and used. Attached Figure Description

[0017] Figure 1 This is a front view of a preferred embodiment of the present invention;

[0018] Figure 2 This is a top view of a preferred embodiment of the present invention;

[0019] Figure 3 This is a side view of a preferred embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional view of a preferred embodiment of the present invention.

[0021] Explanation of reference numerals in the attached diagram:

[0022] 10. Beam body; 11. Main beam top slab

[0023] 12. Reinforced concrete layer 13. Waterproof layer

[0024] 14. Asphalt concrete layer; 20. Precast body

[0025] 21. Base shell 22. Guardrail body

[0026] 201. Hollowed-out space; 202. Casting hole

[0027] 203, connecting groove 30, steel reinforcement cage

[0028] 31. Longitudinal reinforcement; 32. First vertical main reinforcement.

[0029] 33. Second vertical main reinforcement; 40. Intermediate core.

[0030] 51. First reinforcing bar; 52. Second reinforcing bar Detailed Implementation

[0031] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a beam 10, a prefabricated body 20, a steel reinforcement frame 30, and an intermediate core 40.

[0032] The beam 10 has a first reinforcing bar 51 embedded in it; specifically, the beam 10 includes a main beam top plate 11, a reinforced concrete layer 12, a waterproof layer 13, and an asphalt concrete layer 14; the first reinforcing bar 51 is embedded in the main beam top plate 11, the reinforced concrete layer 12 is laid on the surface of the main beam top plate 11, the waterproof layer 13 is laid on the surface of the reinforced concrete layer 12, and the asphalt concrete layer 14 is laid on the surface of the waterproof layer 13.

[0033] The precast body 20 is made of concrete and rests against the beam 10. The precast body 20 includes a base shell 21 and a guardrail body 22. The base shell 21 has a downward-facing hollow space 201 in the middle. The guardrail body 22 extends upward integrally from the base shell 21, and a casting hole 202 is provided on the precast body 20. This casting hole 202 also serves as a vent and communicates with the hollow space 201. In this embodiment, the precast body 20 rests against the top plate 11 of the main beam. The reinforced concrete layer 12, waterproof layer 13, and asphalt concrete layer 14 are all located around the base shell 21. The length of the precast body 20 is 3-5m. The casting hole 202 is located at the center of the top of the guardrail body 22 and extends vertically downwards, communicating with the hollow space 201. Connecting slots 203 are provided at both ends of the precast body 20. The thickness of the base shell 21 is 6-8cm.

[0034] The reinforcing steel skeleton 30 is bound and fixed within the precast body 20. Part of the reinforcing steel skeleton 30 is located within the hollow space 201, and it is coupled to the first reinforcing steel bar 51. In this embodiment, the first reinforcing steel bar 51 extends upwards and into the hollow space 201. The first reinforcing steel bar 51 is annular. The reinforcing steel skeleton 30 is coupled to the first reinforcing steel bar 51 via multiple longitudinally inserted second reinforcing steel bars 52 to enhance anchorage. Furthermore, multiple first reinforcing steel bars 51 are arranged longitudinally at intervals, with a spacing of 100-200 mm between adjacent bars. The diameter of each first reinforcing steel bar 51 is 14-25 mm. The diameter of each second reinforcing steel bar 52 is 10-16 mm. Specifically, the steel reinforcement cage 30 includes multiple longitudinal steel bars 31, multiple first vertical main bars 32, and multiple second vertical main bars 33. The longitudinal steel bars 31 are distributed within the base shell 21 and the guardrail body 22, with each longitudinal steel bar 31 extending longitudinally. The multiple first vertical main bars 32 are arranged longitudinally at intervals, with a distance of 100-200mm between adjacent first vertical main bars 32. All first vertical main bars 32 are located within the base shell 21. Each of the first vertical main bars 32 is fixedly connected to the corresponding longitudinal steel bar 31. The diameter of each first vertical main bar 32 is 10-20mm. The multiple second vertical main bars 33 are arranged longitudinally at intervals, and the distance between two adjacent second vertical main bars 33 is 100-200mm. The multiple second vertical main bars 33 are all located in the guardrail body 22. Each second vertical main bar 33 is fixedly connected to the corresponding longitudinal steel bar 31 and the corresponding first vertical main bar 32. The diameter of each second vertical main bar 33 is 10-20mm.

[0035] The intermediate core 40 is formed by pouring concrete into the hollow space 201 through the pouring hole 202. The intermediate core 40 is combined with the base shell 21, the steel reinforcement skeleton 30, the beam 10 and the first steel reinforcement 51.

[0036] The manufacturing and construction process of this embodiment is described in detail below:

[0037] First, the steel reinforcement frame 30 is fabricated in the factory, and the precast body 20 is precast using concrete. The precast body 20 is then tied and fixed together with the steel reinforcement frame 30. Next, the precast body 20 is hoisted to the construction site. The main beam top slab 11 is pre-prepared at the construction site, and the first steel reinforcement 51 is embedded in the main beam top slab 11. After the precast body 20 is hoisted and placed on the main beam top slab 11, the first steel reinforcement 51 extends into the hollow space 201, and then the second steel reinforcement 52 is inserted longitudinally, so that the first steel reinforcement 51 is coupled and connected to the steel reinforcement frame 30. Then, the expansion joint is filled with sealant, and then concrete is poured a second time from the pouring hole 202 into the hollow space 201. The grade of the poured concrete should be one grade higher than that of the precast body 20, and fine aggregate non-shrink concrete is used to form the intermediate core 40 to form a whole. Finally, the reinforced concrete layer 12, the waterproof layer 13, and the asphalt concrete layer 14 are laid in sequence.

[0038] The key design feature of this invention is that by setting up a prefabricated body with a hollow space in the middle of the base shell, the steel reinforcement skeleton can be coupled and connected to the first steel reinforcement after the prefabricated body is hoisted. This allows for factory prefabrication and rapid on-site hoisting without affecting the bridge deck paving construction process. Furthermore, by pouring concrete into the hollow space through the pouring hole to form the intermediate core, the construction process does not require the use of formwork, greatly accelerating the construction progress, significantly improving construction efficiency, ensuring pouring quality, and reducing noise and dust pollution during construction. It is green and environmentally friendly and can be widely promoted and used.

[0039] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A template-free intermediate-pour concrete precast median crash barrier structure, characterized by: The system comprises a beam, a precast body, a reinforcing steel skeleton, and an intermediate core. A first reinforcing steel bar is embedded in the beam. The precast body is made of concrete and rests against the beam. It includes a base shell and a guardrail body. The base shell has a downward-facing hollow space in the center. The guardrail body extends upward integrally from the base shell, and a pouring hole is provided on the precast body, communicating with the hollow space. The reinforcing steel skeleton is bound and fixed within the precast body, with a portion of the skeleton located within the hollow space. The skeleton is coupled to the first reinforcing steel bar. The intermediate core is formed by secondary concrete pouring into the hollow space through the pouring hole. The intermediate core is integrated with the base shell, reinforcing steel skeleton, beam, and first reinforcing steel bar.

2. A template-free intermediate-pouring concrete prefabricated central crash barrier structure according to claim 1, characterized in that: The first reinforcing bar extends upward and into the hollow space. The first reinforcing bar is ring-shaped. The reinforcing bar skeleton is coupled to the first reinforcing bar through a plurality of longitudinally inserted second reinforcing bars.

3. A template-free intermediate-pouring concrete precast central crash barrier structure according to claim 1, characterized in that: The casting hole is located at the center of the top of the guardrail body, and extends vertically downwards to connect with the hollow space.

4. A template-free precast intermediate poured concrete median crash barrier structure as defined in claim 1, wherein: The prefabricated body has connecting slots at both ends.

5. A template-free precast intermediate poured concrete median crash barrier structure as defined in claim 1 wherein: The beam body includes a main beam top slab, a reinforced concrete layer, a waterproof layer, and an asphalt concrete layer; the precast body rests on the main beam top slab, the first reinforcing bar is embedded in the main beam top slab, the reinforced concrete layer is laid on the surface of the main beam top slab and located on the periphery of the base shell, the waterproof layer is laid on the surface of the reinforced concrete layer and located on the periphery of the base shell, and the asphalt concrete layer is laid on the surface of the waterproof layer and located on the periphery of the base shell.

6. A template-free precast intermediate poured concrete median crash barrier structure as defined in claim 1 wherein: The thickness of the base shell is 6-8cm.

7. A template-free intermediate-pouring concrete precast central crash barrier structure as claimed in claim 1, characterized in that: The length of the prefabricated body is 3-5m.

8. A template-free precast intermediate poured concrete median crash barrier structure as defined in claim 1 wherein: The first reinforcing bar consists of multiple bars arranged longitudinally at intervals, with a spacing of 100-200mm between adjacent bars, and a diameter of 14-25mm.

9. A template-free intermediate-pouring concrete precast central crash barrier structure as defined in claim 2, characterized in that: The diameter of the second reinforcing bar is 10-16mm.

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