CN205295836U - Highway bridge tunnel highway section combined type road surface structure - Google Patents

Abstract

The utility model relates to the field of traffic facility construction, in particular to a composite pavement structure for expressway bridge-tunnel sections. The roadbed is provided with a pavement, and the pavement includes a graded crushed stone layer, and a lean concrete layer is provided on the crushed stone layer. , the lean concrete layer is provided with a continuous reinforced concrete layer, the continuous reinforced concrete layer is provided with an AC-20C modified asphalt layer, and the AC-20C modified asphalt layer is provided with SMA-13 modified layer of asphalt. The road surface of the composite pavement structure of the highway bridge-tunnel section of the utility model can make full use of the mixing field of the bridge-tunnel structure, and does not need to build a stabilized soil mixing building separately. Long service life, low maintenance frequency, suitable for bridges and bridges, bridges and tunnels, and tunnels and other structures, used for short special road sections.

Description

A Composite Pavement Structure of Expressway Bridge-Tunnel Section

technical field

The utility model relates to the field of traffic facility construction, in particular to a composite pavement structure of a bridge-tunnel section of an expressway.

Background technique

As the expressway extends from the Sichuan Basin to the surrounding mountains and western plateau, due to the complex geological and topographic conditions along the project, the proportion of bridge-tunnel structures in the route has increased significantly, and bridges and bridges, bridges and bridges have appeared in many expressway sections. Tunnels, as well as tunnels connected to tunnels and other structures, adopt traditional semi-rigid structures, requiring the construction of special mixing equipment, and in such a construction section, it is not easy to be rolled, prone to early disease, and the frequency of maintenance after use is high. During the operation period, the traffic flow is relatively dense, the maintenance progress is very slow, and even the traffic is interrupted, affecting people's travel. Bridges and tunnels are engineering structures commonly used in the construction of roads and other traffic lines in mountainous areas. When roads and other traffic lines pass through mountains and valleys, in order to overcome the influence of elevation and valley obstacles in the line, it is usually necessary to set a large number of bridges and tunnels. In order to facilitate construction and ensure quality, combined with the use of concrete in the construction process of bridges and tunnel structures, traffic flow is relatively dense after they are put into use. In order to reduce the frequency of road surface maintenance in the later stage, the road surface structure was adjusted during the construction stage. The adjusted road surface is very suitable for the short road surface of bridge and tunnel structures, which greatly improves the service life and construction efficiency.

Utility model content

The purpose of the invention of the utility model is to provide a composite pavement structure of bridge-tunnel section of expressway in view of the problems existing in the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: a composite pavement structure of highway bridge-tunnel section, pavement is laid on the subgrade, the pavement includes a gravel layer, and the gravel layer contains gravel and filled in Sand particles in the crevices of gravel, the gravel layer is provided with a lean concrete layer, the lean concrete layer is provided with a continuous reinforced concrete layer, and the continuous reinforced concrete layer is provided with an AC-20C modified asphalt layer , the AC-20C modified asphalt layer is provided with a SMA-13 modified asphalt layer, the thickness of the gravel layer is 150mm, the thickness of the lean concrete layer is 200mm, the thickness of the continuous reinforced concrete layer is 280mm, AC The thickness of -20C modified asphalt layer is 60mm, and the thickness of SMA-13 modified asphalt layer is 40mm.

The graded crushed stone cushion is composed of crushed stones with a certain gradation, which can partially eliminate the uneven settlement of the roadbed. Lean concrete is a kind of material prepared by coarse and fine aggregates and a certain amount of cement and water. Its strength is much higher than that of semi-rigid base materials such as lime fly ash stabilized aggregates and cement stabilized crushed stone. Lean concrete has high strength and rigidity, good water stability, and strong erosion resistance. There is a continuous reinforced concrete layer, which is equipped with longitudinal continuous steel bars and transverse steel bars, and cement concrete pavements without shrinkage joints in the horizontal direction. Asphalt pavement causes reflective cracks. Lean concrete and continuous reinforced concrete can make full use of the concrete mixing plant used in bridge and tunnel structures, without adding new mixing equipment. The thermal expansion and contraction deformation of the continuous reinforced concrete itself is reduced through the anchorage end of the steel bar. SMA: Asphalt mastic macadam mixture is a very attractive new type of asphalt mixture that has appeared internationally in recent years. It is famous for its excellent anti-rutting performance and anti-skid performance. The first SMA pavement was built in Germany in the mid-1960s. It has a history of more than 40 years and is still in good use. In 1992, SMA was used for the first time in my country's Capital Airport Expressway. Beijing Capital Airport is the most important airport in my country and the gateway of the country, known as "the first road of the country". SMA-13 modified asphalt is a formula of asphalt in SMA. AC-20C modified asphalt is made of high quality SBS modified asphalt.

As a preferred solution of the present utility model, the two ends of the crushed stone layer, the lean concrete layer, the continuous reinforced concrete layer, the AC-20C modified asphalt layer and the SMA-13 modified asphalt layer are provided with steel bar anchorage ends, which are connected with the bridge connected by tunnel structures. As a preferred solution of the present invention, the crushed stone layer may contain recycled aggregate particles, and the recycled aggregate particles are filled in the gaps of crushed stones, with a particle size of 2mm-5mm.

As a preferred solution of the present invention, drainage grooves are provided at both ends of the road surface. The drainage groove can remove the accumulated water on the road surface in time, so as to prevent the road surface from being deformed due to long-term rain or water immersion.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are: the construction of a composite pavement structure in the highway bridge-tunnel section is very convenient, the pavement performance is good, it is not easily deformed, the service life is long, and the maintenance frequency is low , suitable for the pavement of special bridge-tunnel sections.

Description of drawings

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

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

A composite pavement structure of a highway bridge-tunnel section. A pavement 1 is laid on the roadbed. The pavement 1 includes a graded crushed stone layer 2. The crushed stone layer 2 contains crushed stone materials with a certain gradation. The crushed stone The layer 2 is provided with a lean concrete layer 3, the lean concrete layer 3 is provided with a continuous reinforced concrete layer 4, and the continuous reinforced concrete layer 4 is provided with an AC-20C modified asphalt layer 5, and the AC- 20C modified asphalt layer 5 is provided with SMA-13 modified asphalt layer 6, the thickness of the gravel layer 2 is 150mm, the thickness of the lean concrete layer 3 is 200mm, the thickness of the continuous reinforced concrete layer 4 is 280mm, AC The thickness of the -20C modified asphalt layer 6 is 60 mm, and the thickness of the SMA-13 modified asphalt layer 6 is 40 mm.

Example 2

A composite pavement structure of a highway bridge-tunnel section. A pavement 1 is laid on the roadbed. The pavement 1 includes a graded crushed stone layer 2. The crushed stone layer 2 contains crushed stone materials with a certain gradation. The crushed stone The layer 2 is provided with a lean concrete layer 3, the lean concrete layer 3 is provided with a continuous reinforced concrete layer 4, and the continuous reinforced concrete layer 4 is provided with an AC-20C modified asphalt layer 5, and the AC- 20C modified asphalt layer 5 is provided with SMA-13 modified asphalt layer 6, the thickness of the gravel layer 2 is 150mm, the thickness of the lean concrete layer 3 is 200mm, the thickness of the continuous reinforced concrete layer 4 is 280mm, AC The thickness of the -20C modified asphalt layer 6 is 60 mm, and the thickness of the SMA-13 modified asphalt layer 6 is 40 mm.

The two ends of the crushed stone layer 2, the lean concrete layer 3, the continuously reinforced concrete layer 4, the AC-20C modified asphalt layer 5 and the SMA-13 modified asphalt layer 6 are provided with reinforcement anchorage ends 7.

Example 3

A composite pavement structure of a highway bridge-tunnel section. A pavement 1 is laid on the roadbed. The pavement 1 includes a graded crushed stone layer 2. The crushed stone layer 2 contains crushed stone materials with a certain gradation. The crushed stone The layer 2 is provided with a lean concrete layer 3, the lean concrete layer 3 is provided with a continuous reinforced concrete layer 4, and the continuous reinforced concrete layer 4 is provided with an AC-20C modified asphalt layer 5, and the AC- 20C modified asphalt layer 5 is provided with SMA-13 modified asphalt layer 6, the thickness of the gravel layer 2 is 150mm, the thickness of the lean concrete layer 3 is 200mm, the thickness of the continuous reinforced concrete layer 4 is 280mm, AC The thickness of the -20C modified asphalt layer 6 is 60 mm, and the thickness of the SMA-13 modified asphalt layer 6 is 40 mm.

The two ends of the crushed stone layer 2, the lean concrete layer 3, the continuously reinforced concrete layer 4, the AC-20C modified asphalt layer 5 and the SMA-13 modified asphalt layer 6 are provided with reinforcement anchorage ends 7.

The crushed stone layer 2 also contains recycled aggregate particles, and the recycled aggregate particles are filled in the gaps of crushed stones, with a particle size of 2mm-5mm.

Example 4

A composite pavement structure of a highway bridge-tunnel section. A pavement 1 is laid on the roadbed. The pavement 1 includes a graded crushed stone layer 2. The crushed stone layer 2 contains crushed stone materials with a certain gradation. The crushed stone The layer 2 is provided with a lean concrete layer 3, the lean concrete layer 3 is provided with a continuous reinforced concrete layer 4, and the continuous reinforced concrete layer 4 is provided with an AC-20C modified asphalt layer 5, and the AC- 20C modified asphalt layer 5 is provided with SMA-13 modified asphalt layer 6, the thickness of the gravel layer 2 is 150mm, the thickness of the lean concrete layer 3 is 200mm, the thickness of the continuous reinforced concrete layer 4 is 280mm, AC The thickness of the -20C modified asphalt layer 6 is 60 mm, and the thickness of the SMA-13 modified asphalt layer 6 is 40 mm.

The two ends of the crushed stone layer 2, the lean concrete layer 3, the continuously reinforced concrete layer 4, the AC-20C modified asphalt layer 5 and the SMA-13 modified asphalt layer 6 are provided with reinforcement anchorage ends 7.

The crushed stone layer 2 also contains recycled aggregate particles, and the recycled aggregate particles are filled in the gaps of crushed stones, with a particle size of 2mm-5mm.

Both ends of the road surface 1 are provided with drainage grooves.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. a freeway bridge tunnel section composite pavement structure, roadbed is laid road surface (1), it is characterised by: described road surface (1) includes graded broken stone layer (2), described metalling (2) comprises the crushed stone material with certain grating, described metalling (2) is provided with lean concrete layer (3), described lean concrete layer (3) is provided with continuous reinforcement concrete layer (4), described continuous reinforcement concrete layer (4) is provided with AC-20C modified asphalt layer (5), described AC-20C modified asphalt layer (5) is provided with SMA-13 modified asphalt layer (6), the thickness of described metalling (2) is 150mm, the thickness of lean concrete layer (3) is 200mm, the thickness of continuous reinforcement concrete layer (4) is 280mm, the thickness of AC-20C modified asphalt layer (6) is 60mm, the thickness of SMA-13 modified asphalt layer (6) is 40mm.

2. a kind of freeway bridge tunnel section according to claim 1 composite pavement structure, it is characterised in that: the two ends of described metalling (2), lean concrete layer (3), continuous reinforcement concrete layer (4), AC-20C modified asphalt layer (5) and SMA-13 modified asphalt layer (6) are provided with Bar Anchorage end (7).

3. a kind of freeway bridge tunnel section according to claim 1 composite pavement structure, it is characterised in that: possibly together with regeneration aggregate granule in described metalling (2), described regeneration aggregate is particles filled in rubble gap, and particle diameter is 2mm-5mm.

4. a kind of freeway bridge tunnel section according to claim 1 composite pavement structure, it is characterised in that: described road surface (1) two ends are provided with rhone.