CN216237943U - Small traffic rural highway cement concrete pavement prefabricated structure - Google Patents

Abstract

The utility model discloses a cement concrete pavement assembly type structure of a small-traffic rural highway, which is characterized in that a soil base layer, a broken stone stabilizing semi-rigid base layer and a cement concrete surface layer are sequentially laid from bottom to top, and the cement concrete surface layer is formed by sequentially butting a plurality of prefabricated concrete panels from front to back. A plurality of dowel bars are arranged at one longitudinal end of the precast concrete slab, and a bar groove of the dowel bar is reserved at the other end of the precast concrete slab; a positioning anti-skid component is additionally arranged in the precast concrete slab; hanging rings are pre-buried at four corners of the concrete panel respectively, and a gap is reserved between adjacent prefabricated concrete panels, so that grouting and joint filling operations are facilitated. The utility model has reasonable design and simple structure, the concrete panels are prefabricated in factories, and are directly hoisted and laid on site, the construction efficiency is greatly improved, the labor intensity of site construction is reduced, the construction period is greatly shortened, and a certain concrete panel can be independently replaced after being damaged.

Description

Small traffic rural highway cement concrete pavement prefabricated structure

technical field

The utility model belongs to the technical field of road structures, in particular to a small traffic rural road cement concrete pavement assembled structure.

Background technique

Small-traffic rural roads (such as field roads, usually no more than 3.5m in width) are generally suitable for connecting roads between natural villages, and are important infrastructures to improve rural production and living conditions and promote the flow of rural people. At present, in the construction of rural roads with small traffic volume, the concrete surface layer is directly poured on the soil base. This construction method has defects or deficiencies such as large amount of on-site pouring, low efficiency, long construction period, and difficult quality assurance. Environmental impact is greater.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a cement concrete pavement assembled structure for small traffic rural roads with simple structure, high construction efficiency and short period.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a small traffic rural road cement concrete pavement assembled structure, including the soil base, the crushed stone stable semi-rigid base and the cement concrete surface layer laid sequentially from bottom to top, the cement concrete The surface layer is made up of several prefabricated concrete panels connected in turn in the front and rear directions. Each concrete panel is provided with an upper-layer steel mesh and a lower-layer steel mesh. The positioning anti-skid components.

The front end of the concrete panel is provided with a row of dowel rods at intervals along the left and right directions. The dowel rods are made of smooth round steel bars. The dowel rods are arranged in the front and rear directions. The rear end of the dowel rods are embedded in the concrete panel. All parts of the front face of the panel are treated with anti-rust treatment; the rear face of the concrete faceplate is reserved for a rod slot for inserting a row of dowel rods at the front end of the adjacent concrete faceplate.

The positioning and anti-skid assembly includes several casings and positioning ribs arranged in a rectangular array. The casings are pre-buried in the concrete panel and fixedly connected with the lower reinforcement mesh. The centerline of the casings is set vertically, and the lower end of the casings is flush with the lower surface of the concrete panel; The upper part of the positioning rib is screwed or assembled in the casing, and the lower end of the positioning rib has a sharp structure and extends into the semi-rigid base layer stabilized by the gravel.

A gap is left between two adjacent prefabricated concrete panels for subsequent grouting and hot bitumen caulking operations.

Lifting rings are embedded in the four corners of the concrete panel respectively. The lifting rings are connected to the upper steel mesh, and the exposed parts of the lifting rings are treated with anti-rust treatment.

By adopting the above technical scheme, in the construction of rural roads with small traffic volume, the soil base layer is constructed first, and then the semi-rigid base layer is evenly spread with gravel on the soil base layer. Then the transporter transports the factory prefabricated concrete panels to the construction site, uses small cranes to hoist the lifting rings on the four corners of the concrete panels, lays the concrete panels on the semi-rigid base of the crushed stone stabilized, and the sharp structures at the lower ends of the positioning ribs are inserted into the Crushed stone stabilizes the semi-rigid base to position the concrete panel to avoid slippage of the concrete panel when there is a road slope. The adjacent concrete panels are positioned and connected in the left and right directions through the dowel rods extending into the rod grooves, and then the cement mortar is poured from the gaps reserved between the adjacent concrete panels to fill the bottom surface of the concrete panels. The crushed stone stabilizes the gap between the semi-rigid bases to form a grouting layer. After grouting at the bottom of the concrete panel and completing the static curing, the gap between the adjacent concrete panels is filled with hot asphalt and leveled. Grouting and hot asphalt caulking have a good sealing effect on plate joints, which can prevent rainwater infiltration, reduce pavement structural diseases, and effectively control the flatness between prefabricated pavement panels.

After the gravel stabilized semi-rigid base and the cement concrete surface layer are laid, part of the surface board will be emptied, so grouting is performed between the gravel stabilized semi-rigid base and the cement concrete surface layer to form a grouting layer.

Due to the low road grade of rural highways, the semi-rigid base layer stabilized by gravel is directly laid on the upper part of the soil foundation, and the cement concrete surface layer is directly hoisted and laid on the gravel base layer, and the structure level of the road surface is relatively simple.

The upper reinforcement mesh and the lower reinforcement mesh are arranged inside the concrete panel to improve the strength of the entire concrete panel during hoisting and transportation, and at the same time laying on the road surface can also improve the bearing capacity.

The positioning rib is directly embedded in the concrete panel. This structure is simple and easy to operate during prefabrication, but during transportation, the sharp structure at the lower end of the positioning rib will occupy a certain space, and there will be installation hidden dangers during hoisting. Therefore, the utility model design In order to pre-embed the casing on the lower side of the concrete panel, after the concrete panel is hoisted to the semi-rigid base of the gravel stabilized on site, the front or rear side of the concrete panel is lifted, the positioning ribs are screwed or inserted into the casing, and then The whole concrete panel is laid on the gravel-stabilized semi-rigid base, and the positioning ribs are inserted into the gravel-stabilized semi-rigid base. The gravel-stabilized semi-rigid base can be a mixture of cement-soil, graded gravel, cement-stabilized aggregate, lime-soil stabilized aggregate, and lime-soil.

To sum up, compared with the prior art, the utility model can achieve the following effects: the utility model has a reasonable design, a simple structure, the concrete panels are prefabricated in the factory, hoisted and laid directly on site, the construction efficiency is greatly improved, and the on-site construction is also reduced. The labor intensity and construction period are also greatly shortened, and when a certain concrete panel is damaged, it can be replaced separately.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the top view of the present utility model;

Figure 3 is a schematic diagram of the structure of a concrete panel.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the assembled structure of cement concrete pavement of small traffic rural highway of the present invention comprises soil base 1, crushed stone stable semi-rigid base 2 and cement concrete surface laid in sequence from bottom to top Layer 3, the cement concrete surface layer 3 is formed by connecting several prefabricated concrete panels 4 in turn in the front and rear directions. Each concrete panel 4 is provided with an upper reinforcement mesh 5 and a lower reinforcement mesh 6, and the bottom of each concrete panel 4 is provided with There are positioning anti-skid components extending into the gravel-stabilized semi-rigid base 2 .

The front end face of the concrete panel 4 is provided with a row of dowel bars 7 at intervals along the left and right directions. The dowel bars 7 are made of smooth round steel bars. The dowel bars 7 are arranged in the front and rear directions. All parts of the dowel bar 7 protruding from the front end of the concrete panel 4 are subjected to anti-rust treatment;

The positioning and anti-skid assembly includes several sleeves 9 and positioning ribs 10 arranged in a rectangular array. The sleeves 9 are pre-buried in the concrete panel 4 and are fixedly connected with the lower reinforcement mesh 6. The centerline of the sleeves 9 is vertically arranged, and the lower end of the sleeves 9 is The lower surface of the concrete panel 4 is flush; the upper part of the positioning rib 10 is screwed or assembled in the casing 9 , and the lower end of the positioning rib 10 has a sharp structure and protrudes into the semi-rigid base 2 stabilized by the gravel.

A gap 13 is left between two adjacent prefabricated concrete panels 4 for subsequent grouting and hot asphalt joint filling operations.

The four corners of the concrete panel 4 are respectively pre-embedded with lifting rings 11, which are connected to the upper reinforcement mesh 5, and the exposed parts of the lifting rings 11 are subjected to anti-rust treatment.

In the construction of rural roads with small traffic volume, the soil base 1 is constructed first, and then the semi-rigid base 2 is evenly spread on the soil base 1 with gravel to stabilize. Next, the transport vehicle transports the factory-prefabricated concrete panels 4 to the construction site, uses a small crane to hoist the lifting rings 11 on the four corners of the concrete panels 4, lays the concrete panels 4 on the semi-rigid base 2 stabilized by the gravel, and locates the lower ends of the ribs 10. The sharp structure is inserted into the gravel-stabilized semi-rigid base 2, so that the concrete panel 4 is positioned to avoid slippage of the concrete panel 4 when there is a road slope. The adjacent concrete panels 4 are positioned and connected in the left and right direction through the dowel rod 7 extending into the rod groove 8, and then the cement mortar is poured from the gap 13 reserved between the adjacent concrete panels 4 to fill the gap. The gap between the bottom surface of the flat concrete panel 4 and the gravel-stabilized semi-rigid base 2 forms a layer of grouting layer 12 . Fill the joints with hot asphalt and construct leveling. Grouting and hot asphalt caulking have a good sealing effect on plate joints, which can prevent rainwater infiltration, reduce pavement structural diseases, and effectively control the flatness between prefabricated pavement panels.

After the gravel-stabilized semi-rigid base 2 and the cement concrete surface layer 3 are laid, part of the surface slabs will be hollowed out, so grouting is performed between the gravel-stabilized semi-rigid base 2 and the cement concrete surface layer 3 to form a layer of grouting. Layer 12.

Due to the low grade of rural roads, the gravel-stabilized semi-rigid base 2 is directly laid on the upper part of the soil foundation, and the cement concrete surface layer 3 is directly hoisted and laid on the gravel base, and the pavement structure level is relatively simple.

The upper reinforcement mesh 5 and the lower reinforcement mesh 6 are arranged inside the concrete panel 4 to improve the strength of the entire concrete panel 4 during hoisting and transportation, and at the same time laying on the road surface can also improve the bearing capacity.

The positioning rib 10 is directly embedded in the concrete panel 4. This structure is simple and easy to operate during prefabrication, but during transportation, the sharp structure at the lower end of the positioning rib 10 will occupy a certain space, and there will be hidden dangers in installation during hoisting. The utility model is designed to pre-embed the casing 9 on the lower side of the concrete panel 4, and after the concrete panel 4 is hoisted to the semi-rigid base 2 stabilized by the gravel on site, the front or rear side of the concrete panel 4 is lifted, and the positioning rib 10 is lifted. Screw or insert into the casing 9 , and then lay the whole concrete panel 4 on the gravel-stabilized semi-rigid base 2 , and insert the positioning ribs 10 into the gravel-stabilized semi-rigid base 2 . The gravel-stabilized semi-rigid base 2 can be a mixture of cement-soil, graded gravel, cement-stabilized aggregate, lime-soil stabilized aggregate, and lime-soil.

This embodiment does not limit the shape, material, structure, etc. of the present invention in any form, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the technology of the present invention. The scope of protection of the program.

Claims (5)

1. Rural highway cement concrete pavement assembled structure of small traffic, its characterized in that: including the soil base layer of laying in proper order from bottom to top, semi-rigid base layer and cement concrete surface course are stabilized to the rubble, and the cement concrete surface course is dock in proper order along the fore-and-aft direction by a plurality of prefabricated concrete panels and forms, and every concrete panel is inside to be equipped with upper reinforcing bar net and lower floor's reinforcing bar net, and every concrete panel bottom all is equipped with to stretch into the intraformational location anti-skidding subassembly of semi-rigid base layer is stabilized to the rubble.

2. The small traffic rural highway cement concrete pavement fabricated structure of claim 1, characterized in that: the front end face of the concrete panel is provided with a row of dowel bars at intervals along the left-right direction, the dowel bars are made of optical round steel bars and arranged along the front-back direction, the rear ends of the dowel bars are embedded in the concrete panel, and all parts of the dowel bars protruding out of the front end face of the concrete panel are subjected to rust prevention treatment; a rod groove for inserting a row of dowel bars at the front end of the adjacent concrete panel is reserved on the rear end face of the concrete panel.

3. The small transportation rural highway cement concrete pavement fabricated structure of claim 1 or 2, wherein: the positioning anti-skid component comprises a plurality of sleeves and positioning ribs which are arranged in a rectangular array, the sleeves are pre-embedded in the concrete panel and are fixedly connected with the lower layer reinforcing mesh, the central lines of the sleeves are vertically arranged, and the lower ends of the sleeves are flush with the lower surface of the concrete panel; the upper part of the positioning rib is in threaded connection or interference fit in the sleeve, and the lower end part of the positioning rib is of a sharp structure and extends into the gravel-stabilized semi-rigid base layer.

4. The small traffic rural highway cement concrete pavement fabricated structure of claim 2, characterized in that: and a gap is reserved between two adjacent prefabricated concrete panels for subsequent grouting and hot asphalt gap filling operations.

5. The small traffic rural highway cement concrete pavement fabricated structure of claim 2, characterized in that: hanging rings are pre-buried at four corners of the concrete panel respectively and are connected with the upper layer reinforcing mesh, and the part of the hanging rings exposed outside is subjected to rust prevention treatment.

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