1. The utility model provides a bridge deck pavement structure based on high performance rubber concrete which characterized in that, includes and lays in the cast-in-place layer of rubber cement concrete (1), SBR modified emulsified asphalt waterproof layer (2) and asphalt concrete surface course (3) on the bridge floor from bottom to top, predetermine two-way reinforcing bar net of individual layer (4) in the tensile district of cast-in-place layer of rubber cement concrete (1).

2. The bridge deck pavement structure based on high-performance rubber concrete according to claim 1, characterized in that the total thickness of the rubber cement concrete cast-in-place layer (1), the SBR modified emulsified asphalt waterproof layer (2) and the asphalt concrete surface layer (3) paved on the bridge deck is 16.3 cm-18.3 cm.

3. The bridge deck pavement structure based on high-performance rubber concrete according to claim 1, wherein the asphalt concrete surface layer (3) adopts SMA-13 grade or SMA-16 grade, the void ratio is 3.5-4.5%, and the thickness is 8.0-12.0 cm.

4. Bridge deck pavement structure based on high-performance rubber concrete according to claim 1, characterized in that the SBR-modified emulsified asphalt waterproof layer (2) has an amount of 0.5kg/m of SBR-modified emulsified asphalt²～0.6kg/m²。

5. Bridge deck pavement structure based on high-performance rubber concrete according to claim 1, characterized in that the thickness of the rubber cement concrete cast-in-place layer (1) is 8.0 cm-10.0 cm.

6. The bridge deck pavement structure based on the high-performance rubber concrete according to claim 5, wherein the rubber cement concrete cast-in-place layer (1) is formed by replacing 20% of lightweight aggregate with equal volume in an adding mode of rubber particles with the particle size of 1-2 mm, and the adding amount is 60kg/m²～65kg/m²。

7. A deck pavement structure based on high-performance rubber concrete according to claim 1, characterized in that the single-layer bidirectional reinforcing mesh (4) is a mesh with longitudinal reinforcing bars and transverse reinforcing bars vertically crossed.

8. A deck pavement structure based on high-performance rubber concrete according to claim 7, characterized in that the longitudinal steel bars and the transverse steel bars are laid at a distance of 10cm x 10 cm.

9. A deck pavement structure based on high-performance rubber concrete according to claim 7, characterized in that the clear distance between the single-layer bidirectional reinforcing mesh (4) and the deck is 2.0 cm-2.5 cm.

10. A deck pavement structure based on high-performance rubber concrete according to claim 7, 8 or 9, characterized in that the longitudinal steel bars and the transverse steel bars of the single-layer bidirectional reinforcing mesh (4) are HRB 400-grade 10 ribbed steel bars.

Background

Along with the rapid development of national economy of China, the construction of highway traffic, especially the construction of highway bridges, has achieved remarkable achievement. The bridge deck pavement is a protective layer directly paved on a bridge deck (main beam), is an important component of a bridge superstructure, is directly subjected to pressure, impact and shear load of wheels, is worn and weathered under repeated actions of automobiles and climatic environments, is restrained by the bridge superstructure, and plays roles of protecting a bridge main body and providing a comfortable and safe road surface function for driving. Therefore, bridge deck pavement needs to have the capability of resisting external load and bridge deformation, and also needs to have the characteristics of smoothness, skid resistance, wear resistance and the like.

In addition, the bridge deck pavement should have a good waterproof effect, so as to ensure that rainwater and other harmful substances cannot permeate into the bridge deck through the pavement layer to corrode the upper structure of the bridge.

At present, when the bridge structure is designed in China, special calculation and analysis are not carried out on bridge deck pavement generally, and in actual design, the bridge deck pavement is only used as an auxiliary structure of bridge engineering, so that a designer spends little energy on the bridge deck pavement. In fact, the actual stress of the bridge deck pavement is very complex, and in addition, in most bridges in China at the present stage, the phenomena of heavy traffic, heavy load and overload, uneven thickness caused by the selection of bridge deck pavement materials and construction methods generally exist, so that the bridge deck pavement has a serious early damage phenomenon, and various damages of the bridge deck pavement on many expressways are much more serious than those of common road sections. Once the bridge deck pavement is damaged, the safety of the bridge structure is necessarily threatened.

The cement concrete bridge deck pavement is a traditional structural form and has been widely adopted due to the advantages of high rigidity, high strength, low cost and the like, but under the long-term action of vehicle load, the problems of the cement concrete pavement layer are gradually exposed, and the defects of easy cracking, fatigue failure, water seepage and the like cause the later maintenance cost to be increased and the service life of the structure to be reduced. Therefore, it is necessary to deeply analyze and research the damage cause and mechanism of the cement concrete bridge deck pavement and improve the durability of the cement concrete bridge deck pavement.

Disclosure of Invention

The invention aims to provide a bridge deck pavement structure based on high-performance rubber concrete, so as to overcome the defects in the prior art.

The technical scheme for solving the technical problems is as follows: the bridge deck pavement structure based on the high-performance rubber concrete comprises a rubber cement concrete cast-in-place layer, an SBR (styrene butadiene rubber) modified emulsified asphalt waterproof layer and an asphalt concrete surface layer which are paved on a bridge deck from bottom to top, wherein a single-layer bidirectional reinforcing mesh is preset in a tension area of the rubber cement concrete cast-in-place layer.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the total thickness of the rubber cement concrete cast-in-place layer, the SBR modified emulsified asphalt waterproof layer and the asphalt concrete surface layer paved on the bridge deck is 16.3 cm-18.3 cm.

Further, the asphalt concrete surface layer adopts SMA-13 gradation or SMA-16 gradation, the void ratio is 3.5-4.5%, and the thickness is 8.0-12.0 cm.

Further, the amount of the SBR modified emulsified asphalt in the SBR modified emulsified asphalt waterproof layer is 0.5kg/m²～0.6kg/m²。

Further, the thickness of the rubber cement concrete cast-in-place layer is 8.0 cm-10.0 cm.

Further, the rubber particles used in the cast-in-place layer of the rubber cement concrete have the particle size of 1-2 mm, the adding mode is that the equal volume replaces 20 percent of lightweight aggregate, and the adding amount is 60kg/m²～65kg/m²。

Furthermore, the rubber particles are used as fine aggregates in the cast-in-place layer of the rubber cement concrete.

Further, the rubber particles are derived from crushed waste tires.

Furthermore, the single-layer bidirectional reinforcing mesh is a mesh with vertical reinforcing bars and transverse reinforcing bars which are vertically distributed in a crossed manner.

Further, the laying distance between the longitudinal steel bars and the transverse steel bars is 10cm multiplied by 10 cm.

Furthermore, the clear distance between the single-layer bidirectional reinforcing mesh and the bridge deck is 2.0 cm-2.5 cm.

Furthermore, the longitudinal steel bars and the transverse steel bars adopted by the single-layer bidirectional reinforcing mesh are HRB 400-grade phi 10 ribbed steel bars.

The invention has the beneficial effects that:

1) the high-performance rubber cement concrete material is adopted as a cast-in-place layer paved on a bridge deck, the waste rubber is crushed into rubber particles, the rubber particles are subjected to surface modification treatment by the silane coupling agent and are used as fine aggregates to be added into the concrete, so that the fatigue resistance, the bending toughness, the impermeability and the water resistance of the concrete can be well improved, and the requirements on raw materials, design and construction are relatively simple;

2) the rubber aggregate is derived from waste tires, the tire yield and the number of the waste tires are increased year by year along with the rapid increase of the holding capacity of automobiles in China, the application of the rubber cement concrete to bridge deck pavement is beneficial to solving the problems of recycling and resource utilization of waste rubber, the ecological environmental protection significance is outstanding, the novel bridge deck pavement structure conforms to the development direction of highway traffic science and technology, and the novel bridge deck pavement structure has good economic and social benefits and engineering application prospects;

3) the bridge deck pavement structure has good anti-permeability and anti-cracking performance, proper strength and better economic and technical benefits, can improve the anti-deformation performance and the driving comfort when being applied to engineering, protects the beam body from being corroded and frozen by rainwater, prolongs the service life, and reduces the maintenance and later maintenance cost;

4) moderate rigidity, and elastic modulus of 1.5 multiplied by 10 of rubber cement concrete⁴MPa～3.5×10⁴The plate bottom distribution load can be reduced, the deformation capacity is higher, and the driving comfort is improved;

5) compared with common concrete with the same strength, the rubber cement concrete has higher breaking strength, and reduces the possibility of cracking of a pavement layer in actual use;

6) the waterproof performance is good, and the rubber cement concrete bridge deck pavement is suitable for areas with large rainfall and bridge decks immersed in water in a short period of time by virtue of the characteristics of the material;

7) the damping is large, the rubber cement concrete has strong capability of resisting dynamic impact, and a beam body can be well protected from being damaged by impact;

8) the fatigue life is long, the rubber cement concrete bridge deck is paved under the repeated action of wheels, the fatigue damage is not easy to generate, the design service life of the pavement is long, and the later maintenance cost is low;

9) the SBR modified emulsified asphalt waterproof layer is adopted in the bridge deck pavement structure, rubber cement concrete and asphalt concrete surface layers can be firmly bonded together, interlayer shear damage caused by bridge deck pavement is avoided, the SBR modified emulsified asphalt is good in water performance, simple and convenient to construct, less in environmental pollution and obvious in economic benefit.

Drawings

FIG. 1 is a cross-sectional view of a deck pavement structure based on high performance rubber concrete according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the concrete structure comprises a rubber cement concrete cast-in-place layer, 2, an SBR modified emulsified asphalt waterproof layer, 3, an asphalt concrete surface layer and 4, a single-layer bidirectional reinforcing mesh.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1, a bridge deck pavement structure based on high-performance rubber concrete comprises a rubber cement concrete cast-in-place layer 1, an SBR modified emulsified asphalt waterproof layer 2 and an asphalt concrete surface layer 3 which are paved on a bridge deck from bottom to top, wherein a single-layer bidirectional reinforcing mesh 4 is preset in a tensile region of the rubber cement concrete cast-in-place layer 1, and the total thickness of the rubber cement concrete cast-in-place layer 1, the SBR modified emulsified asphalt waterproof layer 2 and the asphalt concrete surface layer 3 on the bridge deck is 16.3 cm;

wherein, the asphalt concrete surface layer 3 adopts SMA-13 gradation, the void ratio is 3.5 percent, and the thickness is 8.0 cm;

the amount of the SBR modified emulsified asphalt in the SBR modified emulsified asphalt waterproof layer 2 is 0.5kg/m²；

The rubber cement concrete cast-in-place layer 1 uses rubber particles with the grain diameter of 1-2 mm, the adding mode is that the equal volume replaces 20 percent of light aggregate, and the adding amount is 60kg/m²The thickness is 8.0 cm;

the single-layer bidirectional reinforcing mesh 4 is a mesh with vertical reinforcing bars and transverse reinforcing bars vertically distributed in a crossed manner, and the clear distance between the mesh and the bridge floor is 2.0 cm.

Example 2

As shown in fig. 1, a bridge deck pavement structure based on high-performance rubber concrete comprises a rubber cement concrete cast-in-place layer 1, an SBR modified emulsified asphalt waterproof layer 2 and an asphalt concrete surface layer 3 which are paved on a bridge deck from bottom to top, wherein a single-layer bidirectional reinforcing mesh 4 is preset in a tensile region of the rubber cement concrete cast-in-place layer 1, and the total thickness of the rubber cement concrete cast-in-place layer 1, the SBR modified emulsified asphalt waterproof layer 2 and the asphalt concrete surface layer 3 on the bridge deck is 18.3 cm;

wherein, the asphalt concrete surface layer 3 adopts SMA-16 gradation, the void ratio is 4.5 percent, and the thickness is 10.0 cm;

the amount of the SBR modified emulsified asphalt in the SBR modified emulsified asphalt waterproof layer 2 is 0.6kg/m²；

The rubber cement concrete cast-in-place layer 1 uses rubber particles with the grain diameter of 1-2 mm, the adding mode is that the equal volume replaces 20 percent of light aggregate, and the adding amount is 65kg/m²The thickness is 8.0 cm;

the single-layer bidirectional reinforcing mesh 4 is a mesh with vertical reinforcing bars and transverse reinforcing bars vertically distributed in a crossed manner, and the clear distance between the mesh and the bridge floor is 2.5 cm.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.