CN216193725U

CN216193725U - Anti-freezing and anti-swelling airport pavement structure

Info

Publication number: CN216193725U
Application number: CN202122662303.8U
Authority: CN
Inventors: 孙忠金
Original assignee: Northeast Branch Of Civil Aviation Airport Planning Design And Research Institute Co ltd
Current assignee: Northeast Branch Of Civil Aviation Airport Planning Design And Research Institute Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-04-05
Anticipated expiration: 2031-11-02

Abstract

The utility model provides an anti-freezing and anti-swelling airport pavement structure, which comprises: arranging a granular cushion layer on a soil foundation, paving a cement stabilization graded broken stone base layer on the granular cushion layer, paving a waterproof geomembrane on the cement stabilization graded broken stone base layer, and pouring a surface layer on the waterproof geomembrane; first transverse drainage layers are symmetrically filled on two sides of the granular material cushion layer, and a first soil layer is filled above the first transverse drainage layers; a second transverse drainage layer is symmetrically filled on two sides of the cement stabilization graded broken stone base layer, a second soil layer is filled above the second transverse drainage layer, and a grass planting layer is arranged above the second soil layer; the outer sides of the first transverse drainage layer and the second transverse drainage layer are respectively provided with a water permeable pipe which leads to a drainage ditch. The utility model has the following beneficial effects: the ground surface can be prevented from permeating into the soil foundation underwater, and meanwhile, the moisture in the pavement structure layer can be removed as soon as possible, so that frost heaving damage of the pavement is reduced, the service life of the pavement is prolonged, the landing safety of an airplane is guaranteed, the operation service quality of an airport is improved, and the operation maintenance cost is reduced.

Description

Anti-freezing and anti-swelling airport pavement structure

Technical Field

The utility model relates to the technical field of pavement structures, in particular to an anti-frost-heaving airport pavement structure.

Background

The existing cold area pavement is easy to be damaged by frost heaving of the pavement, has poor durability and influences flight safety.

At present, the pavement of a newly-built airport in a severe cold area is mostly paved by cement concrete with high strength and good freezing resistance. However, the cement concrete pavement of the airport is prone to slab staggering, sinking, slab breakage, slab joint mud pumping and other diseases under the freeze-thaw cycle condition, and the reasons are as follows: surface runoff seeps downwards along the slab joints, and foundation soil pore water and capillary water are accumulated in coarse particle cushion pores which are not uniformly distributed in space under the action of osmotic pressure, so that non-uniform frost heaving stress is generated in winter, the slab is staggered and extruded, and stress concentration-shaped slab corner fracture is caused. In spring thawing season, although frost heaving stress is unloaded, the pavement structure generates residual deformation, so that slab joints are expanded, and under the power load of a circulating heavy-duty airplane, sludge is generated along the slab joints. As time passes, the flatness of the airport pavement can not meet the safe operation standard of civil aviation any more, and the airport pavement can only be compensated by adopting a non-stop construction repair scheme with high manufacturing cost and great construction difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model provides an anti-frost-heaving airport pavement structure, which solves the problem of frost heaving and damage of a cement concrete pavement in a middle and cold area in the prior art, improves the durability of the airport pavement and ensures the flight safety.

The technical scheme of the utility model is realized as follows:

an anti-bloating airfield pavement structure, comprising: the concrete-filled concrete structure comprises a granular cushion layer arranged on a soil foundation, a cement-stabilized graded broken stone base layer paved on the granular cushion layer, a waterproof geomembrane paved on the cement-stabilized graded broken stone base layer and a cement concrete surface layer poured on the waterproof geomembrane; first transverse drainage layers are symmetrically filled on two sides of the granular cushion layer, and a first soil layer is filled above the first transverse drainage layers; symmetrically filling second transverse drainage layers on two sides of the cement stabilized graded broken stone base layer, filling a second soil layer above the second transverse drainage layers, and arranging a grass planting layer above the second soil layer; the first horizontal drainage layer, the outside on second horizontal drainage layer all is equipped with the pipe of permeating water, the pipe of permeating water leads to the escape canal.

Preferably, an air-entraining water reducing agent is added to the cement concrete surface layer.

Preferably, the cement concrete surface layer is sprayed with a road surface protection solution, and the road surface protection solution is a silane road surface protection solution.

Preferably, the pellet mat has a mud content of no greater than 5%.

Preferably, the first transverse drainage layer and the second transverse drainage layer are graded broken stone transverse drainage layers with the thickness of 15 cm.

Preferably, the water permeable pipe is a PC water permeable pipe.

The utility model has the beneficial effects that:

the frost heaving prevention airport pavement structure can prevent the ground surface from permeating into soil foundations underwater, and can remove moisture in the pavement structure layer as soon as possible, so that frost heaving damage of the pavement is reduced, the service life of the pavement is prolonged, landing safety of an airplane is guaranteed, operation service quality of an airport is improved, and operation and maintenance cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a sectional view of the structure of the frost heaving prevention airport pavement of the present invention;

in the figure:

1. the soil base, 2, first horizontal drainage blanket, 3, first soil layer, 4, aggregate bed course, 5, cement stabilization gradation rubble basic unit, 6, waterproof geomembrane, 7, cement concrete surface course, 8, road surface protection liquid, 9, the pipe of permeating water, 10, escape canal, 11, grass planting layer, 12, second horizontal drainage blanket, 13, second soil layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the embodiment shown in fig. 1, the present invention provides an anti-freeze-swelling airport pavement structure, which comprises: the soil foundation comprises a granular material cushion layer 4 arranged on a soil foundation 1, a cement stabilization graded broken stone base layer 5 paved on the granular material cushion layer 4, a waterproof geomembrane 6 paved on the cement stabilization graded broken stone base layer 5 and a cement concrete surface layer 7 poured on the waterproof geomembrane 6; first transverse drainage layers 2 are symmetrically filled on two sides of the granular cushion layer 4, and first soil layers 3 are filled above the first transverse drainage layers 2; a second transverse drainage layer 12 is symmetrically filled on two sides of the cement stabilization graded broken stone base layer 5, a second soil layer 13 is filled above the second transverse drainage layer 12, and a grass planting layer 11 is arranged above the second soil layer 13; PC pervious pipes 9 are arranged on the outer sides of the first transverse drainage layer 2 and the second transverse drainage layer 12, and the pervious pipes 9 lead to a drainage ditch 10.

An air-entraining water reducing agent is added to the cement concrete surface layer 7.

The cement concrete surface layer 7 is sprayed with a road surface protection liquid 8, and the road surface protection liquid 8 is a silane road surface protection liquid.

The mud content of the pellet mat layer 4 is not more than 5%.

The first transverse drainage layer 2 and the second transverse drainage layer 12 are graded broken stone transverse drainage layers with the thickness of 15 cm.

Above-mentioned prevent frostbite and swell airport pavement structure can prevent in the earth base of the infiltration of earth's surface under water, also can get rid of the moisture in the pavement structure layer as early as possible simultaneously to reduce the pavement frost and swell damaged, prolong pavement life, ensure aircraft safety of rising and falling, promote airport operation quality of service, reduce the operation maintenance cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An anti-frost-heaving airfield pavement structure, comprising: the concrete-based waterproof geotextile comprises a granular cushion layer (4) arranged on a soil base (1), a cement-stabilized graded broken stone base layer (5) paved on the granular cushion layer (4), a waterproof geomembrane (6) paved on the cement-stabilized graded broken stone base layer (5) and a cement concrete surface layer (7) poured on the waterproof geomembrane (6); first transverse drainage layers (2) are symmetrically filled on two sides of the granular cushion layer (4), and a first soil layer (3) is filled above the first transverse drainage layers (2); second transverse drainage layers (12) are symmetrically filled on two sides of the cement stabilization graded broken stone base layer (5), a second soil layer (13) is filled above the second transverse drainage layers (12), and a grass planting layer (11) is arranged above the second soil layer (13); the outside of first horizontal drainage blanket (2), second horizontal drainage blanket (12) all is equipped with pipe (9) of permeating water, tub (9) of permeating water leads to escape canal (10).

2. The airport pavement structure of claim 1, wherein an air-entraining type water reducing agent is added to the cement concrete surface layer (7).

3. The anti-frost-heaving airport pavement structure as claimed in claim 1, wherein the cement concrete surface layer (7) is sprayed with a pavement protection liquid (8), and the pavement protection liquid (8) is a silane pavement protection liquid.

4. An anti-bloating airfield pavement structure as claimed in claim 1, wherein the particulate cushion layer (4) has a mud content of no more than 5%.

5. An anti-bloating airfield pavement structure as claimed in claim 1, wherein the first and second lateral drainage layers (2, 12) are graded crushed stone lateral drainage layers with a thickness of 15 cm.

6. An anti-frost-heaving airport pavement structure as claimed in claim 1, wherein said water-permeable pipe (9) is a PC water-permeable pipe.