Continuous reinforced concrete composite pavement structure

Abstract

The utility model relates to the technical field of highway engineering, in particular to a continuous reinforced concrete composite pavement structure, which comprises a foundation, a protective body and a filling body. The foundation is located on the lowermost layer, the large gravel layer, the small gravel layer and the reinforced concrete layer are sequentially laid on the foundation, the asphalt surface layer is laid on the reinforced concrete layer, and a telescopic channel is arranged between the connecting portions of the two sections of road surfaces. The protection bodies are located in the telescopic channel, and the protection bodies on the two sides are connected with the sections of the reinforced concrete layer and the asphalt surface layer on the corresponding sides correspondingly. The filling body is connected with the protective bodies on the two sides, a central high-strength elastic connecting body is laid on the filling body and connected with the asphalt surface layers on the two sides, and the upper surfaces of the high-strength elastic connecting body and the asphalt surface layers are flush. According to the composite pavement structure, arching or cracking cannot occur in the pavement stretching and retracting process, the whole pavement is always kept flat and seamlessly connected, rainwater infiltration is prevented, and therefore the service life of reinforcing bars is prolonged, and the strength of the pavement is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of highway engineering, in particular to a continuously reinforced concrete composite pavement structure. Background Art

[0002] Continuously reinforced concrete is a form of pavement structure, which is characterized by adding steel bars to the concrete to enhance the bearing capacity and durability of the pavement. This form of pavement structure has the advantages of good driving comfort and high bearing capacity, but the construction process requirements are relatively strict. The design key points of continuously reinforced concrete pavement include the use of reinforced concrete ground beams, which are embedded in the roadbed and connected to the pavement through steel bars, and rely on passive earth pressure to restrain longitudinal displacement. When laying the pavement around the inverted bearing manhole cover, the use of continuously reinforced concrete composite pavement structure can significantly strengthen the integral cast-in-place construction of the manhole seat and the continuously reinforced concrete base course.

[0003] The technical solution disclosed in the Chinese patent with the publication number CN114086442A eliminates the original gap through the expansion joint structure. The joint body has good elasticity, high strength, strong anti-deformation ability, and simple structure, which can reduce stress concentration and eliminate impact load.

[0004] However, this device still has deficiencies: in this pavement structure, although the high-strength elastic and tough resin mortar layer has a certain flexibility after paving, there is no limit on both sides, and it is only glued. After multiple expansions and contractions, the high-strength elastic and tough resin mortar layer is easy to separate from the entire pavement. Content of the Utility Model

[0005] The purpose of the utility model is to propose a continuously reinforced concrete composite pavement structure aiming at the problems existing in the background art.

[0006] The technical solution of the utility model: a continuously reinforced concrete composite pavement structure, including a foundation, which is located at the bottom layer. A large gravel layer is laid on the foundation, a small gravel layer is laid on the large gravel layer, a reinforced concrete layer is laid on the small gravel layer, and an asphalt surface layer is laid above the reinforced concrete layer. And a telescopic channel is arranged between the reinforced concrete layer and the asphalt surface layer at the connection part of two sections of the pavement.

[0007] A protective body, which is located in the telescopic channel, and the two side protective bodies are respectively connected to the cross-sections of the corresponding side reinforced concrete layer and asphalt surface layer.

[0008] And a filling body, which is located in the telescopic channel, and the filling body is connected to both side protective bodies. A central high-strength elastic connecting body is laid on the filling body. The high-strength elastic connecting body is connected to the mutually close end faces of the two side asphalt surface layers, and the upper surface of the high-strength elastic connecting body is flush with the upper surface of the asphalt surface layer.

[0009] Preferably, the reinforcement in the reinforced concrete layer is steel bars, the protective body is a reinforced concrete structure body, and the reinforcement in the protective body is glass fiber bars.

[0010] Preferably, clamping grooves are arranged on one side of each of the two asphalt surface layers close to each other, T-shaped shoulders are arranged on one side of each of the two protective bodies away from each other, and the two T-shaped shoulders are respectively inserted into the corresponding clamping grooves.

[0011] Preferably, limiting grooves are arranged on one side of each of the two protective bodies close to each other, limiting strips are arranged on both sides of the high-strength elastic connecting body, and the two limiting strips are respectively inserted into the corresponding limiting grooves.

[0012] Preferably, anti-slip teeth are arranged on the protective body, anti-slip grooves are symmetrically arranged at the bottom of the high-strength elastic connecting body, and the anti-slip grooves are engaged with the anti-slip teeth, so as to drive the high-strength elastic connecting body to move inward or extend to both sides when the two reinforced concrete layers and the asphalt surface layer approach or move away from each other, and keep the connecting parts of the high-strength elastic connecting body with the reinforced concrete layer and the asphalt surface layer in fit during the telescopic process of the high-strength elastic connecting body.

[0013] Preferably, the filling body is a high-strength elastic and tough resin layer, and micro-permeation holes penetrating up and down are arranged on the high-strength elastic and tough resin layer.

[0014] Preferably, a groove is arranged in the middle of the high-strength elastic connecting body, and a plurality of through holes are arranged at the bottom of the groove on the high-strength elastic connecting body. A central limiting body is arranged in the groove, a plurality of pins are arranged at the bottom of the central limiting body, and each pin respectively passes through the corresponding through hole downward and is inserted into the filling body.

[0015] Preferably, the high-strength elastic connecting body is a plastic connecting body.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] By arranging the protective body, the end faces of the reinforced concrete layers on both sides of the telescopic channel are protected by the protective body to prevent rainwater from seeping down to corrode the steel bars in the reinforced concrete; by arranging micro-permeation holes on the filling body, on the one hand, the micro-permeation holes can facilitate the rainwater to seep down directly into the gravel layer, and on the other hand, during the telescopic process of the filling body, the structure of the micro-permeation holes makes its telescopic response faster. By arranging anti-slip grooves at the bottom of the high-strength elastic connecting body and anti-slip teeth on the protective body, and the two are engaged with each other, the high-strength elastic connecting body moves synchronously with the two protective bodies on both sides, avoiding the occurrence of cracks. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the layered structure of the utility model;

[0019] Figure 2 is a schematic diagram of the connection structure between the asphalt surface layer and the protective body;

[0020] Figure 3 It is a schematic structural diagram of a high-strength elastic connector;

[0021] Figure 4 It is a schematic structural diagram of a filler.

[0022] Reference numerals: 1, foundation; 2, large gravel layer; 3, small gravel layer; 4, reinforced concrete layer; 5, asphalt surface layer; 501, card slot; 6, protective body; 601, T-shaped shoulder; 602, limit groove; 603, anti-slip teeth; 7, filler; 701, micro-permeable holes; 8, high-strength elastic connector; 801, limit strip; 802, anti-slip groove; 803, groove; 804, through hole; 9, central limit body; 10, bolt. Detailed implementation manners

[0023] Embodiment 1

[0024] As Figures 1-4 shown, a continuously reinforced concrete composite pavement structure proposed by the present utility model includes a foundation 1, a protective body 6 and a filler 7. The foundation 1 is located at the bottom layer. A large gravel layer 2 is laid on the foundation 1, a small gravel layer 3 is laid on the large gravel layer 2, a reinforced concrete layer 4 is laid on the small gravel layer 3, and an asphalt surface layer 5 is laid above the reinforced concrete layer 4. A telescopic channel is provided between the reinforced concrete layer 4 and the asphalt surface layer 5 at the connection part of two sections of the pavement. The protective body 6 is located in the telescopic channel, and the two sides of the protective body 6 are respectively connected to the cross-sections of the corresponding side of the reinforced concrete layer 4 and the asphalt surface layer 5. Card slots 501 are provided on one side of the two asphalt surface layers 5 close to each other, T-shaped shoulders 601 are provided on one side of the two protective bodies 6 away from each other, and the two T-shaped shoulders 601 are respectively inserted into the card slots 501 on the corresponding side. The filler 7 is a high-strength elastic resin layer, and micro-permeable holes 701 penetrating up and down are provided on the high-strength elastic resin layer. The filler 7 is located in the telescopic channel, and the filler 7 is connected to the two protective bodies 6. A central high-strength elastic connector 8 is laid on the filler 7, and the high-strength elastic connector 8 is a plastic connector. The high-strength elastic connector 8 is connected to the end faces of the two asphalt surface layers 5 close to each other, and the upper surface of the high-strength elastic connector 8 is flush with the upper surface of the asphalt surface layer 5. Limit grooves 602 are provided on one side of the two protective bodies 6 close to each other, limit strips 801 are provided on both sides of the high-strength elastic connector 8, and the two limit strips 801 are respectively inserted into the limit grooves 602 on the corresponding side. Anti-slip teeth 603 are provided on the protective body 6, anti-slip grooves 802 are symmetrically provided at the bottom of the high-strength elastic connector 8, and the anti-slip grooves 802 are engaged with the anti-slip teeth 603, so as to drive the high-strength elastic connector 8 to move inward or extend to both sides when the two reinforced concrete layers 4 and the asphalt surface layers 5 approach or move away from each other, and keep the connection parts of the high-strength elastic connector 8 with the reinforced concrete layer 4 and the asphalt surface layer 5 in close contact during the telescopic process of the high-strength elastic connector 8.

[0025] In this embodiment, when paving the road surface around the inverted bearing manhole cover on the road surface, in order to strengthen the integral cast-in-place construction of the manhole seat and the continuously reinforced concrete base, it is necessary to prevent the road surface around the manhole cover from expanding and contracting sharply due to temperature changes, resulting in arching or cracking. A telescopic channel is reserved around the manhole cover. First, a large gravel layer 2 is laid on the roadbed and around the manhole cover, and then a small gravel layer is laid. At this time, an inner ring protective body 6 is first laid around the manhole cover, and a protective body 6 is laid at an appropriate distance outside the inner ring protective body 6. Then a filling body is laid between the two side protective bodies 6. Before the filling body dries, it is perforated to form micro-permeation holes 701 that directly lead the rainwater in the gap into the gravel layer. Subsequently, a reinforced concrete layer 4 is laid on the roadbeds on both the inner and outer sides of the outer ring protective body 6. Then an asphalt surface layer 5 is laid on the reinforced concrete layer 4. After the asphalt surface layer 5 dries, the end faces of the asphalt surface layer 5 on both sides of the telescopic channel are trimmed to form clamping grooves 501. Then a high-strength elastic connecting body 8 is laid on the two side protective bodies 6 and the filling body 7. The initial state of the high-strength elastic connecting body 8 is a fluid state, and its bottom raw material automatically flows into the gaps of the anti-slip teeth 603 to form anti-slip grooves at the bottom of the high-strength elastic connecting body 8. When the high-strength elastic connecting body 8 flows toward both sides, part of the raw material enters the clamping grooves 501 to form limiting strips 801, so that each part of the structure is fully and stably connected. When the road surface expands and contracts, the protective bodies 6 approach each other or move away synchronously. At this time, the filling body 7 automatically shrinks or expands toward both sides, and at the same time, the top high-strength elastic connecting body 8 automatically expands and contracts, so that there are no gaps at the connection parts between the road surfaces on both sides and the high-strength elastic connecting body 8.

[0026] Embodiment 2

[0027] In a continuously reinforced concrete composite road surface structure proposed by the present utility model, compared with Embodiment 1, the reinforcement in the reinforced concrete layer 4 is steel bars, the protective body 6 is a reinforced concrete structure body, and the reinforcement in the protective body 6 is glass fiber bars.

[0028] In this embodiment, steel bars are used as the reinforcement for the continuously reinforced concrete in the main section of the road surface, which can improve the bearing capacity of the road surface. For the road surface around the manhole cover, more consideration needs to be given to the corrosion and fracture of the steel bars soaked in water caused by rainwater infiltration. Therefore, the reinforcement in the protective body 6 is replaced with glass fiber bars. Glass fiber bars have the advantages of strong heat resistance, corrosion resistance, and good durability, avoiding the corrosion and fracture of the steel bars in the concrete after being soaked in water due to rainwater infiltration when cracks appear on the road surface. Moreover, the expansion coefficients of glass fiber bars and concrete are closer, reducing the cracking of concrete caused by temperature changes, thereby effectively preventing water seepage caused by cracks at the connection between the manhole cover and the surrounding road surface.

[0029] Embodiment 3

[0030] Such as Figure 3 AndFigure 4 As shown in the figure, a continuously reinforced concrete composite pavement structure proposed by the present utility model, compared with Embodiment 1, a groove 803 is centrally arranged on the high-strength elastic connector 8, and a plurality of through holes 804 are arranged at the bottom of the groove 803 on the high-strength elastic connector 8. A central limiting body 9 is arranged in the groove 803, and a plurality of pins 10 are arranged at the bottom of the central limiting body 9. Each pin 10 respectively passes through the corresponding through hole 804 on the side and is inserted into the filling body 7.

[0031] In this embodiment, the middle part is connected to the filling body through the central limiting body 9, effectively preventing the pavement on both sides of the middle expansion joint from expanding and contracting, causing the high-strength elastic connector body 8 to arch and separate from the pavement. And this structure makes the amplitude of the high-strength elastic connector 8 extending to both sides or contracting from both sides to the inside consistent, avoiding uneven stress on both sides resulting in one side detaching from the pavement section.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those skilled in the art to which the present utility model pertains.

Claims

1. A continuously reinforced concrete composite pavement structure, characterized in that, including a foundation (1) which is located at the bottom layer. A large gravel layer (2) is laid on the foundation (1), a small gravel layer (3) is laid on the large gravel layer (2), a reinforced concrete layer (4) is laid on the small gravel layer (3), an asphalt surface layer (5) is laid above the reinforced concrete layer (4), and a telescopic channel is arranged between the reinforced concrete layer (4) and the asphalt surface layer (5) at the connecting part of the two road surfaces; a protective body (6) which is located in the telescopic channel, and the two side protective bodies (6) are respectively connected to the cross-sections of the corresponding side reinforced concrete layer (4) and asphalt surface layer (5); and a filling body (7) which is located in the telescopic channel, and the filling body (7) is connected to both side protective bodies (6). A central high-strength elastic connecting body (8) is laid on the filling body (7), and the high-strength elastic connecting body (8) is connected to the end faces of the two side asphalt surface layers (5) that are close to each other, and the upper surface of the high-strength elastic connecting body (8) is flush with the upper surface of the asphalt surface layer (5).

2. The continuous reinforced concrete composite pavement structure according to claim 1, characterized in that, The reinforcement in the reinforced concrete layer (4) is steel bars, the protective body (6) is a reinforced concrete structure body, and the reinforcement in the protective body (6) is glass fiber bars.

3. A continuously reinforced concrete composite pavement structure according to claim 1, characterized in that, Card slots (501) are arranged on one side of the two side asphalt surface layers (5) that are close to each other, T-shaped shoulders (601) are arranged on one side of the two side protective bodies (6) that are far from each other, and the two side T-shaped shoulders (601) are respectively inserted into the corresponding side card slots (501).

4. A continuously reinforced concrete composite pavement structure according to claim 1, characterized in that, Limit grooves (602) are arranged on one side of the two side protective bodies (6) that are close to each other, limit strips (801) are arranged on both sides of the high-strength elastic connecting body (8), and the two side limit strips (801) are respectively inserted into the corresponding side limit grooves (602).

5. A continuously reinforced concrete composite pavement structure according to claim 1, characterized in that, Anti-slip teeth (603) are arranged on the protective body (6), anti-slip grooves (802) are symmetrically arranged at the bottom of the high-strength elastic connecting body (8), and the anti-slip grooves (802) are engaged with the anti-slip teeth (603) so as to drive the high-strength elastic connecting body (8) to move inward or extend to both sides when the two side reinforced concrete layers (4) and the asphalt surface layer (5) move close to or away from each other, and keep the connecting part of the high-strength elastic connecting body (8) and the reinforced concrete layer (4) as well as the asphalt surface layer (5) in fit during the telescopic process of the high-strength elastic connecting body (8).

6. A continuously reinforced concrete composite pavement structure according to claim 1, characterized in that, The filling body (7) is a high-strength elastic and tough resin layer, and micro-permeable holes (701) penetrating up and down are arranged on the high-strength elastic and tough resin layer.

7. A continuously reinforced concrete composite pavement structure according to claim 6, characterized in that, A groove (803) is arranged in the middle of the high-strength elastic connecting body (8), and a number of through holes (804) are arranged at the bottom of the groove (803) on the high-strength elastic connecting body (8); a central limiting body (9) is arranged in the groove (803), a number of pins (10) are arranged at the bottom of the central limiting body (9), and each pin (10) respectively passes through the corresponding side through hole (804) downward and is inserted into the filling body (7).

8. A continuously reinforced concrete composite pavement structure according to claim 1, characterized in that, The high-strength elastic connecting body (8) is a plastic connecting body.

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