CN213804695U

CN213804695U - Anti-rutting semi-flexible pavement structure

Info

Publication number: CN213804695U
Application number: CN202022144815.0U
Authority: CN
Inventors: 李涛; 胡治华; 陈明超; 梁锦; 朱文鑫
Original assignee: Qingdao Highway & Bridge Construction Group Co ltd
Current assignee: Qingdao Highway & Bridge Construction Group Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-07-27
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses an anti rut semi-flexible pavement structure mainly relates to road surface construction field. Including the stable rubble basic unit of double-deck water, asphalt concrete layer, the semi-flexible pavement layer of laying in proper order from bottom to top, spread between the stable rubble basic unit of water of upper strata and the asphalt concrete layer permeable blanket and lower seal coat, spread the adhesion coating between asphalt concrete layer and the semi-flexible pavement layer, its characterized in that: the semi-flexible pavement layer comprises a large-gap matrix asphalt mixture and a grouting material, the large-gap matrix asphalt mixture is laid on the bonding layer, communicated gaps are formed in the large-gap matrix asphalt mixture, and the grouting material is filled in the gaps. The beneficial effects of the utility model reside in that: the anti-rutting device can greatly improve the anti-rutting capability of the road surface and ensure the service life of the road surface, particularly the road surface of a level crossing.

Description

Anti-rutting semi-flexible pavement structure

Technical Field

The utility model relates to a road surface construction field specifically is an anti rut semi-flexible pavement structure.

Background

The ruts, one of the most common diseases of asphalt pavements, seriously affect the driving safety and the service performance of roads. In order to prevent track diseases, road researchers propose solutions from the material aspect, and the specific method mainly changes the gradation composition of the asphalt mixture or adds various anti-track additives in the asphalt mixture, and the current common method comprises the following steps: modifying asphalt, adding fiber, adding anti-rutting agent and SMA asphalt mastic macadam. The method is simple and easy to implement, can be widely applied to expressways and first-level highways, and can well inhibit the track-resistant diseases of the pavement by the structure of the SMA asphalt mastic macadam surface layer and the AC asphalt concrete lower surface layer. However, long-term engineering experience shows that at a level crossing with traffic lights, the structure has very limited anti-rutting effect at the crossing due to frequent braking and starting of vehicles. Particularly, for intersections with large proportion of extra-heavy traffic, the newly-built road surface is obviously damaged by ruts after being used in summer, and the ruts are quickly damaged after being newly paved by maintenance and milling. Therefore, how to start from the aspects of structure and material, change the structural form of the road and change the material of the upper layer is a fundamental solution for effectively inhibiting the 'stubborn diseases' of the ruts of the level crossing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti rut semi-flexible pavement structure, it can improve the anti rut ability in road surface greatly, guarantees the life on road surface especially level crossing road surface.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides an anti rut semi-flexible pavement structure, includes the stable rubble basic unit of double-deck water, asphalt concrete layer, the semi-flexible pavement layer of laying in proper order from bottom to top, spreads permeable blanket and lower seal between the stable rubble basic unit of water on upper strata and the asphalt concrete layer, spread the adhesive linkage between asphalt concrete layer and the semi-flexible pavement layer, the semi-flexible pavement layer includes big space base member bituminous mixture and grout material, big space base member bituminous mixture lays on the adhesive linkage, be equipped with the space of intercommunication in the big space base member bituminous mixture, grout material fills in the space.

Furthermore, the thickness of each water-stable macadam foundation layer is not less than 18 cm, the asphalt concrete layer is of an AC-13F type, the thickness of the asphalt concrete layer is not less than 3 cm, and the thickness of the semi-flexible pavement layer is not less than 8 cm.

Contrast prior art, the beneficial effects of the utility model reside in that:

the utility model lays a double-layer water-stable macadam base layer as a foundation on the existing pavement foundation, guarantees the structural strength of the bottom layer, lays an asphalt concrete layer above the water-stable macadam base layer, guarantees the structural strength of the upper layer, lays a spreading permeable layer and a lower sealing layer between the water-stable macadam base layer and the asphalt concrete layer at the same time, the permeable layer enables the asphalt concrete layer to be well combined with a non-asphalt material base layer, a thin layer of the surface of the base layer formed by pouring emulsified asphalt, coal asphalt or liquid asphalt on the base layer can seal a certain layer to be water-proof and waterproof, can also play a role in transition and effective connection between the base layer and the asphalt concrete layer, lays a semi-flexible pavement layer on the asphalt concrete layer, lays an adhesive layer between the two layers, enables the two layers to be adhered into a whole, and the semi-flexible pavement layer is made by filling grout in a large-gap base body asphalt mixture, the large-gap matrix asphalt mixture can form communicated gaps inside after being laid, the grouting material is filled in the communicated gaps and can form a compact-framework embedded and extruded structure after being solidified, the grouting material can automatically level and permeate into the asphalt mixture under the action of gravity during construction through embedding and extruding among the aggregates, bonding of the aggregates and asphalt and the effect of resisting automobile load by the strength formed by cement mortar, vibration is not needed, pressure is not needed to be applied, the vehicle can be driven after grouting for 1-3 hours, extra maintenance and re-planing and milling of the road surface are not needed at ordinary times, the service life is long, and the large-gap matrix asphalt mixture has better economic benefits after being comprehensively paved.

Drawings

Fig. 1 is a schematic view of a conventional road surface structure.

Fig. 2 is a schematic diagram of the pavement structure of the present invention.

Reference numerals shown in the drawings:

1. a water-stabilized macadam base; 2. an asphalt concrete layer; 3. a semi-flexible pavement layer; 4. a transparent layer; 5. a lower sealing layer; 6. sticking a layer; 7. and (7) roadbed.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

The utility model relates to an anti-rutting semi-flexible pavement structure, the existing pavement structure is on the basis of a roadbed 7, generally consists of a double-layer water-stable macadam base layer 1 and an asphalt concrete layer 2 from bottom to top, the asphalt concrete layer 2 is generally laid two to three layers, the upper asphalt concrete layer 2 is taken as a main contact surface layer with a vehicle, rutting easily appears after long-time use, and frequent traffic closure is needed for planning, milling and repairing, while the main structure of the utility model is on the basis of the roadbed 7, the anti-rutting semi-flexible pavement structure comprises the double-layer water-stable macadam base layer 1, the asphalt concrete layer 2 and a semi-flexible pavement layer 3 which are sequentially laid from bottom to top, the water-stable macadam base layer 1 is different from the existing 16 cm, the utility model discloses lay the thickness of 18 cm to further enhance the structural strength of the bottom, a permeable layer 4 and a lower sealing layer 5 are spread between the upper water-stable macadam base layer 1 and the asphalt concrete layer 2, the permeable layer 4 enables the asphalt concrete layer 2 to be well combined with a non-asphalt material base layer, a thin layer penetrating into the surface of the base layer is formed by pouring emulsified asphalt, coal asphalt or liquid asphalt on the base layer, the lower sealing layer 5 can seal a certain layer to play a role of water retention and water prevention and also play a role of transition and effective connection between the base layer and the asphalt concrete layer, an adhesive layer 6 is spread between the asphalt concrete layer 2 and the semi-flexible pavement layer 3 to enable the asphalt concrete layer and the semi-flexible pavement layer to be bonded into a whole, the semi-flexible pavement layer 3 comprises a large-gap matrix asphalt mixture and a grouting material, the large-gap matrix asphalt mixture is laid on the adhesive layer 6, communicated gaps are arranged in the large-gap matrix asphalt mixture, the grouting material is filled in the gaps, the grouting material automatically levels by utilizing the self gravity of the grouting material to permeate into the large-gap matrix asphalt mixture, and a compact-framework embedded extrusion structure is formed after the solidification of a short time, the vehicle can be communicated in a short time, and the structural strength is very high, the anti-rutting capability is strong, and the anti-rutting capability is better.

Preferably, the thickness of each water-stable macadam foundation layer 1 is not less than 18 centimeters, the asphalt concrete layer 2 is of an AC-13F type, the thickness of the asphalt concrete layer is not less than 3 centimeters, the thickness of the semi-flexible pavement layer 3 is not less than 8 centimeters, the structural strength of the semi-flexible pavement layer is further guaranteed, and sufficient support is provided for construction and use of the semi-flexible pavement layer 3.

The construction process and principle are as follows: the main construction process comprises the following steps: the method comprises the steps of carrying out planning and milling disease treatment on the original road surface, laying two water-stable macadam base layers 1, spreading a permeable layer 4 and a lower seal coat 5, spreading an asphalt concrete layer 2, spreading a sticky layer 6, carrying out proportioning debugging and spreading on a large-gap matrix asphalt mixture, carrying out closed maintenance on the large-gap matrix asphalt mixture, carrying out edge sealing treatment, preparing and pouring grouting a grouting material, carrying out surface slurry scraping treatment, maintaining for 1-3 hours, and starting the vehicle;

the utility model lays a double-layer water-stable macadam base layer 1 as a foundation on the existing pavement foundation, ensures the structural strength of the bottom layer, lays an asphalt concrete layer 2 above the water-stable macadam base layer 1, ensures the structural strength of the upper layer, lays a spreading permeable layer 4 and a lower sealing layer 5 between the water-stable macadam base layer 1 and the asphalt concrete layer 2, the permeable layer 4 enables the asphalt concrete layer 2 to be well combined with a non-asphalt material base layer, a thin layer of the base layer surface formed by pouring emulsified asphalt, coal asphalt or liquid asphalt on the base layer, the lower sealing layer 5 can seal a certain layer to play the water-retaining and waterproof functions, and also plays the roles of transition and effective connection between the base layer and the asphalt concrete layer 2, a semi-flexible pavement layer 3 is laid on the asphalt concrete layer 2, an adhesive layer 6 is laid between the two, the two are bonded into a whole, and the semi-flexible pavement layer 3 is made by filling grout in a large-gap base body asphalt mixture, the large-gap matrix asphalt mixture can form communicated gaps inside after being laid, the grouting material is filled in the communicated gaps and can form a compact-framework embedded and extruded structure after being solidified, the grouting material can automatically level and permeate into the asphalt mixture under the action of gravity during construction through embedding and extruding among the aggregates, bonding of the aggregates and asphalt and the effect of resisting automobile load by the strength formed by cement mortar, vibration is not needed, pressure is not needed to be applied, the vehicle can be driven after grouting for 1-3 hours, extra maintenance and re-planing and milling of the road surface are not needed at ordinary times, the service life is long, and the large-gap matrix asphalt mixture has better economic benefits after being comprehensively paved.

Claims

1. The utility model provides an anti rut semi-flexible pavement structure, includes double-deck water-stable rubble basic unit (1), asphalt concrete layer (2), semi-flexible pavement layer (3) of laying in proper order from bottom to top, spreads between the water-stable rubble basic unit (1) of upper strata and asphalt concrete layer (2) permeable coat (4) and lower seal coat (5), spread between asphalt concrete layer (2) and semi-flexible pavement layer (3) viscous layer (6), its characterized in that: the semi-flexible pavement layer (3) comprises a large-gap matrix asphalt mixture and a grouting material, the large-gap matrix asphalt mixture is laid on the adhesive layer (6), communicated gaps are formed in the large-gap matrix asphalt mixture, and the grouting material is filled in the gaps.

2. The structure of claim 1, wherein: every layer the thickness of water-stable macadam basic unit (1) is not less than 18 centimetres, asphalt concrete layer (2) are the AC-13F model, and its thickness is not less than 3 centimetres, the thickness of semi-flexible pavement layer (3) is not less than 8 centimetres.