Prefabricated concrete base for highway guard rails

Abstract

The application relates to the technical field of highway guardrail bases, and provides a highway guardrail prefabricated concrete base which comprises a prefabricated concrete block, a bottom plate, an anchoring assembly and a connecting piece; the top of the prefabricated concrete block is provided with a column mounting hole for the bottom insertion of a guardrail column; a plurality of through holes are further arranged around the column mounting hole of the prefabricated concrete block; the bottom plate is supported at the bottom of the prefabricated concrete block, and a positioning hole is arranged on the bottom plate and corresponds to the position of the through hole; the anchoring assembly passes through the through hole and the positioning hole in sequence and is inserted into the soil at the bottom of the prefabricated concrete block; the anchoring assembly comprises a sleeve, an anchoring rod inserted into the sleeve and a cast-in-place concrete layer filled between the sleeve and the anchoring rod; the connecting piece is arranged at the top of the prefabricated concrete block and is distributed around the column mounting hole; and the connecting piece connects the guardrail column and the anchoring rod. The prefabricated concrete block is installed on site, and the problems of long construction period and low construction efficiency caused by traditional cast-in-place construction are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of highway guardrail bases, specifically relating to a precast concrete base for highway guardrails. Background Technology

[0002] The current construction of perimeter guardrails along highways requires first constructing the concrete base of the guardrail, then inserting and fixing the guardrail posts into the concrete base, and finally installing the guardrail railings. Traditional concrete base construction uses a cast-in-place method, which necessitates on-site formwork installation, pouring, and curing, resulting in a long construction period and low efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a precast concrete base for highway guardrails, which uses precast concrete blocks for on-site installation, thus solving the problems of long construction cycles and low construction efficiency caused by traditional cast-in-place construction.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a precast concrete base for a highway guardrail, comprising a precast concrete block, a base plate, an anchoring assembly, and connectors; the top of the precast concrete block is provided with a post mounting hole for the bottom of a guardrail post to be inserted; the precast concrete block is also provided with multiple through holes around the post mounting hole; the base plate is supported on the bottom of the precast concrete block, and a positioning hole is provided on the base plate corresponding to the position of the through hole; the anchoring assembly passes through the through hole and the positioning hole in sequence and is inserted into the soil located at the bottom of the precast concrete block; the anchoring assembly includes a sleeve, an anchor rod inserted into the sleeve, and a cast-in-place concrete layer filled between the sleeve and the anchor rod; the connectors are disposed on the top of the precast concrete block and distributed around the post mounting hole, and the connectors connect the guardrail post and the anchor rod.

[0005] Furthermore, the top of the anchor rod extends beyond the top of the precast concrete block and is provided with a threaded section; the connector includes a mounting angle iron and a nut; the top of the anchor rod passes through the mounting angle iron, the threaded section is connected to the nut, and the nut presses against the mounting angle iron.

[0006] Furthermore, the connector also includes a connecting bolt, which connects the mounting angle iron and the guardrail post.

[0007] Furthermore, a positioning component is provided on the contact surface between the precast concrete block and the base plate.

[0008] Furthermore, the positioning component includes a positioning protrusion and a positioning groove; the positioning protrusion is disposed on the top of the base plate, the positioning groove is disposed on the bottom of the precast concrete block, and the positioning protrusion is embedded in the positioning groove.

[0009] Furthermore, a level bubble is embedded in the top of the positioning protrusion.

[0010] Furthermore, a buffer and shock-absorbing plate is provided between the side wall of the column mounting hole and the guardrail column.

[0011] Furthermore, the buffer damping plate includes a rubber damping layer and a stainless steel mesh layer, and the stainless steel mesh layer is respectively bonded to two opposite end faces of the rubber damping layer.

[0012] The beneficial effects of this utility model are as follows: A concrete base body is formed by splicing precast concrete blocks and a base plate, and then anchored to the soil using anchoring components, enabling rapid installation of the precast concrete base. Anchor rods and guardrail posts are connected via connectors, allowing for the installation of the guardrail posts and the precast concrete base. Compared to traditional cast-in-place concrete bases, the anchoring components of this utility model fill the space between the sleeve and the anchor rod with a layer of cast-in-place concrete. Furthermore, the concrete base body is composed of precast concrete blocks and a base plate, both of which are precast components, resulting in less cast-in-place construction, a shorter construction cycle, and significantly improved construction efficiency. The cast-in-place concrete layer encases the anchor rod, isolating it from the soil and preventing rust and corrosion, thus ensuring the anchor rod's service life. Since the base plate is supported by the bottom of the precast concrete blocks, its levelness can be controlled by installing the base plate first, followed by installing the precast concrete blocks, ensuring the installation accuracy of the precast concrete blocks and ultimately improving the installation accuracy of the guardrail, reducing installation height errors between different guardrail posts. The shock-absorbing plate can absorb the external impact force on the guardrail post, and the impact force is ultimately transferred to the soil through the anchoring components, reducing or avoiding the impact force on the precast concrete base. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the precast concrete base of the highway guardrail after installation.

[0014] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the precast concrete block, base plate and installation angle iron of the precast concrete base of the highway guardrail of this utility model.

[0015] Figure 3 This is an exploded structural diagram of the buffer and shock-absorbing plate of this utility model.

[0016] In the diagram: 1-Precast concrete block; 2-Base plate; 3-Guardrail post; 4-Post mounting hole; 5-Through hole; 6-Positioning hole; 7-Soil; 8-Sleeve; 9-Anchor rod; 10-Cast-in-place concrete layer; 11-Installation angle iron; 12-Nut; 13-Connecting bolt; 14-Positioning protrusion; 15-Positioning groove; 16-Level bubble; 17-Buffer damping plate; 18-Rubber damping layer; 19-Stainless steel mesh layer. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1-3 The precast concrete base of the highway guardrail shown includes a precast concrete block 1, a base plate 2, anchoring components, connectors, and a shock-absorbing plate 17.

[0019] The precast concrete block 1 is a cube with a post mounting hole 4 at its top for inserting the bottom of the guardrail post 3. The cross-sectional shape of the post mounting hole 4 is similar to the outer contour of the cross-section of the guardrail post 3. The sidewall of the post mounting hole 4 is spaced from the sidewall of the guardrail post 3 for installing the shock-absorbing plate 17. The precast concrete block 1 also has multiple through holes 5 around the post mounting hole 4. In this embodiment, the post mounting hole 4 is located at the center of the top of the precast concrete block 1, and there are four through holes 5 distributed around the post mounting hole 4.

[0020] The base plate 2 is supported on the bottom of the precast concrete block 1. The base plate 2 is also a precast concrete structure. Positioning holes 6 are provided on the base plate 2 corresponding to the through holes 5.

[0021] The anchoring assembly passes through the through hole 5 and the positioning hole 6 in sequence and is inserted into the soil 7 located at the bottom of the precast concrete block 1. The anchoring assembly includes a sleeve 8, an anchor rod 9 inserted into the sleeve 8, and a cast-in-place concrete layer 10 filled between the sleeve 8 and the anchor rod 9. The distance between the sleeve 8 and the anchor rod 9 is greater than or equal to 1 cm. Therefore, the wall thickness of the cast-in-place concrete layer 10 is greater than or equal to 1 cm.

[0022] The connectors are located on the top of the precast concrete block 1 and are distributed around the post mounting holes 4. The connectors are used to connect the guardrail posts 3 and the anchor rods 9.

[0023] The top of the anchor rod 9 extends beyond the top of the precast concrete block 1 and is equipped with a threaded section; the connector includes an installation angle iron 11, a nut 12, and a connecting bolt 13; the top of the anchor rod 9 protrudes through the installation angle iron 11, the threaded section connects with the nut 12, and the nut 12 presses the installation angle iron 11. The connecting bolt 13 connects the installation angle iron 11 and the guardrail post 3. The top of the sleeve 8 is flush with the top of the precast concrete block 1.

[0024] A positioning component is provided on the contact surface between the precast concrete block 1 and the base plate 2. The positioning component includes a positioning protrusion 14 and a positioning groove 15; the positioning protrusion 14 is located on the top of the base plate 2, and the positioning groove 15 is located on the bottom of the precast concrete block 1, with the positioning protrusion 14 embedded in the positioning groove 15. A spirit level 16 is embedded in the top of the positioning protrusion 14. The levelness of the base plate 2 can be determined by the spirit level 16. After the base plate 2 is installed horizontally, the precast concrete block 1 is quickly installed by positioning with the positioning component, so that the precast concrete block 1 sits on the base plate 2. At this time, the through hole 5 and the positioning hole 6 are aligned, which facilitates the insertion of the anchoring component. The positioning groove 15 and the positioning protrusion 14 not only serve a positioning function, but also limit the lateral relative displacement.

[0025] The shock absorber plate 17 includes a rubber damping layer 18 and a stainless steel mesh layer 19. The two opposite ends of the rubber damping layer 18 are respectively bonded with stainless steel mesh layers 19. That is, a stainless steel mesh layer 19 is provided between the rubber damping layer 18 and the guardrail post 3, and another stainless steel mesh layer 19 is provided between the rubber damping layer 18 and the sidewall of the post mounting hole 4 of the precast concrete block 1. The external impact force on the highway guardrail mainly comes from vehicle collision impact. When the guardrail post 3 is impacted, the impact force is transmitted to the shock absorber plate 17. After the rubber damping layer 18 absorbs the energy, it is then transmitted to the soil 7 through the precast concrete block 1 and the anchoring components.

[0026] During construction of the precast concrete base for highway guardrails according to this utility model, the target installation position of the guardrail post 3 is first determined. Then, a hole is excavated at the corresponding soil position 7, with the hole depth greater than or equal to the sum of the thicknesses of the precast concrete block 1 and the base plate 2. After leveling the bottom of the hole, the base plate 2 is placed into the hole, and leveled using a bubble level 16 or other level. Then, the precast concrete block 1 is placed into the hole, and the precast concrete block 1 and the base plate 2 are assembled using positioning components. Next, the sleeve 8 is passed through the through hole 5 and the positioning hole 6. The lower end of the sleeve 8 is inserted into the soil 7 to a certain depth, preferably twice the depth of the precast concrete block 1. The sleeve 8 can be pre-inserted to the target depth, then removed and the soil inside the sleeve 8 is cleared. The sleeve 8 is then inserted into the target depth again. The anchor rod 9 is then inserted into the sleeve 8. The top or upper end of the anchor rod 9 is left with a certain length above the precast concrete block 1 to facilitate the installation of the nut 12 of the angle iron 11. The bottom or lower end of the anchor rod 9 protrudes from the lower end of the sleeve 8 and is inserted into the soil 7. Concrete mortar is then poured to fill the gap between the anchor rod 9 and the sleeve 8. After the concrete solidifies, a cast-in-place concrete layer 10 is formed, which wraps around the anchor rod 9. Next, use nut 12 to install the mounting angle iron 11 on top of the anchor rod 9, with the mounting angle iron 11 positioned on top of the precast concrete block 1. Insert the bottom of the guardrail post 3 into the post mounting hole 4, and fill the space between the side wall of the post mounting hole 4 and the guardrail post 3 with the buffer shock-absorbing plate 17. Then, use connecting bolts 13 to connect and fix the mounting angle iron 11 to the guardrail post 3, completing the installation of the precast concrete base of the highway guardrail and the guardrail post 3. Finally, install the post crossbars between adjacent guardrail posts 3 to complete the installation of the highway guardrail.

[0027] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A precast concrete base for a highway guardrail, characterized in that, The system includes a precast concrete block, a base plate, an anchoring assembly, and connectors. The top of the precast concrete block has a mounting hole for inserting the bottom of a guardrail post. The precast concrete block also has multiple through holes around the mounting hole. The base plate is supported on the bottom of the precast concrete block, and a positioning hole is provided on the base plate corresponding to the position of the through hole. The anchoring assembly passes through the through hole and the positioning hole in sequence and is inserted into the soil at the bottom of the precast concrete block. The anchoring assembly includes a sleeve, an anchor rod inserted into the sleeve, and a cast-in-place concrete layer filling the space between the sleeve and the anchor rod. Connectors are located on the top of the precast concrete block and distributed around the mounting hole, connecting the guardrail post and the anchor rod.

2. The precast concrete base for highway guardrails according to claim 1, characterized in that, The top of the anchor rod extends beyond the top of the precast concrete block and is provided with a threaded section; the connector includes a mounting angle iron and a nut; the top of the anchor rod passes through the mounting angle iron, the threaded section is connected to the nut, and the nut presses against the mounting angle iron.

3. The precast concrete base for highway guardrails according to claim 2, characterized in that, The connector also includes connecting bolts, which connect the mounting angle iron and the guardrail post.

4. The precast concrete base for highway guardrails according to claim 1, characterized in that, The contact surface between the precast concrete block and the base plate is provided with a positioning component.

5. The precast concrete base for highway guardrails according to claim 4, characterized in that, The positioning component includes a positioning protrusion and a positioning groove; the positioning protrusion is disposed on the top of the base plate, the positioning groove is disposed on the bottom of the precast concrete block, and the positioning protrusion is embedded in the positioning groove.

6. The precast concrete base for highway guardrails according to claim 5, characterized in that, A level bubble is embedded in the top of the positioning protrusion.

7. The precast concrete base for highway guardrails according to claim 1, characterized in that, A buffer and shock-absorbing plate is provided between the side wall of the column mounting hole and the guardrail column.

8. The precast concrete base for highway guardrails according to claim 7, characterized in that, The buffer damping plate includes a rubber damping layer and a stainless steel mesh layer, and the stainless steel mesh layer is respectively bonded to the two opposite end faces of the rubber damping layer.

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