CN208668191U - A kind of asphalt pavements with flexible bases - Google Patents

Abstract

The utility model discloses a kind of asphalt pavements with flexible bases, including tamping road bed and be located at base's barricades of tamping road bed two sides, the tamping road bed surface is equipped with leveling layer, the leveling layer or tamping road bed upper surface are equipped with semi-rigid basal layer, the semi-rigid basal layer and it is tamping road bed between be equipped with rubble modified layer, it is successively arranged graded broken stone transition zone and pitch graded broken stone base in the semi-rigid basal layer upper surface, surface layer and superficial layer in pitch graded broken stone base upper surface is successively arranged；By the discharge structure for improving barricade; semirigid support construction is remained at the same time; the bearing basement of each layer of graded broken stone is provided while protecting roadbed; the structural defect for overcoming its water to damage; it is applied in combination by knockdown graded broken stone, takes full advantage of the mechanic nonlinearity feature of rubble.

Description

A kind of asphalt pavements with flexible bases

Technical field

The utility model relates to technical field of road engineering, specially a kind of asphalt pavements with flexible bases.

Background technique

With the development of the high-grade highways such as highway, asphalt pavement structure has become a kind of very universal road surface knot Configuration formula, but due to the shortage of China's pitch resource, most of thin bituminous textures used, due to lacking thickness, in its table Face is easy to generate the presence of the diseases such as track, pit slot, water destruct, reflection crack, or even can also thus derive road pavement knot The destruction of structure, this greatly reduces the service life of bituminous pavement, so that bituminous pavement is far from reaching design toward contact The overhaul that service life will change to a new form also affects the passage of road in the maintenance expense for increasing pavement structure.

For the generation for improving pavement structure service life, reducing disease, in existing technical solution, such as application number A kind of asphalt pavements with flexible bases announced for 201720720851.2, in pavement structure, flexbile base and bituminous sheaths Layer constitutes complete thick formula asphalt surface course together, greatly improves the overall durability energy on road surface.But in the above-mentioned technical solutions, thick Pitch is still main structure, this does not tackle the problem at its root, and in China's pitch the inside, and mature is half Rigid bituminous texture, if it is possible to combine both, then being not only able to cost squeeze, but also can be with reduction technology product The tired time, greatly improve China Higher grade highway builds technical level.

Summary of the invention

In order to overcome the shortcomings of prior art, the utility model provides a kind of asphalt pavements with flexible bases, leads to Improvement barrier wall structure is crossed, remains semirigid support construction at the same time, it is each that graded broken stone is provided while protecting roadbed The bearing basement of layer, can play the role of maximizing favourable factors and minimizing unfavourable ones, and the structural defect for overcoming its water to damage passes through knockdown gradation Rubble is applied in combination, and takes full advantage of the mechanic nonlinearity feature of rubble, can also improve base while guaranteeing drainage performance The anti-rolling ability at bottom can effectively solve the problem of background technique proposes.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of asphalt pavements with flexible bases, including tamping road bed and be located at base's barricades of tamping road bed two sides, institute It states tamping road bed surface and is equipped with semi-rigid basal layer, the semi-rigid equipped with leveling layer, the leveling layer or tamping road bed upper surface Property basal layer and it is tamping road bed between be equipped with rubble modified layer, be successively arranged graded broken stone in the semi-rigid basal layer upper surface Transition zone and pitch graded broken stone base, surface layer and superficial layer in pitch graded broken stone base upper surface is successively arranged；

Wherein, semi-rigid basal layer with a thickness of 5~10cm；

Rubble modified layer with a thickness of 0~15cm；

Graded broken stone transition zone with a thickness of 15~20cm；

Pitch graded broken stone base with a thickness of 10~24cm；

Middle surface layer with a thickness of 5~7cm；

Superficial layer with a thickness of 3~5cm.

As the utility model a preferred technical solution, base's barricade is equipped with several and seeps water at equal intervals Hole, and the water seepage hole two sides are fixedly installed with the solid filter net in outer gibbosity.

As the utility model a preferred technical solution, the tamping road bed, leveling layer, rubble modified layer and semi-rigid Property basal layer composition section be trapezoidal structure, and be located at trapezoidal top semi-rigid basal layer side and base's barricade between Distance is 5~10cm, and is filled with lime stone fine aggregate layer in this gap.

As the utility model a preferred technical solution, between the semi-rigid basal layer and graded broken stone transition zone Equipped with extension substrate, the extension substrate both ends are directly arranged on nature ground, the graded broken stone transition zone and pitch gradation Crushed rock base course is successively trapezoidal to be located in extension substrate, and the middle surface layer and superficial layer are in that rectangle is sequentially arranged at pitch graded broken stone In base.

Compared with prior art, the utility model has the beneficial effects that

The utility model remains semirigid support construction, and improve half by improving barrier wall structure at the same time The thickness of rigid substrate layer and the depth locating for it provide the bearing basement of each layer of graded broken stone while protecting roadbed, The structural defect that its water can also be overcome to damage while can be using semirigid structure protection roadbed, can by maximizing favourable factors and minimizing unfavourable ones To improve the effect of the anti-pressure ability and crack resistence on road surface, the discharge structure of substrate is improved, makes it same with rigidly carrying When can also drain in time, avoid water from damaging, be applied in combination additionally by knockdown graded broken stone, take full advantage of rubble Mechanic nonlinearity feature can also improve the anti-rolling ability of substrate while guaranteeing drainage performance.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Figure label: 1- is tamping road bed；2- base barricade；3- leveling layer；The semi-rigid basal layer of 4-；5- rubble modified layer； 6- graded broken stone transition zone；7- pitch graded broken stone base；Surface layer in 8-；9- superficial layer；10- water seepage hole；11- solid filter Net；12- lime stone fine aggregate layer；13- extends substrate.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1, the utility model provides a kind of asphalt pavements with flexible bases, including tamping road bed 1 and set Base's barricade 2 in tamping road bed 1 two sides, base's barricade 2 are equipped with several equidistant water seepage holes 10, and the infiltration 10 two sides of water hole are fixedly installed with the solid filter net 11 in outer gibbosity.On existing flexible asphalt road, if Surface has flexible structure, often water is entered in roadbed, so that pitch finally generates water damage, therefore, in existing knot In structure, often thicker pitch makes up drawbacks described above, and in the present invention, pass through to be arranged on base's barricade 2 and seep Water hole 10 fundamentally overcomes water to damage scarce so that entire pavement structure is sterically having the ability that can be seeped water It falls into.

Tamping road bed 1 surface is equipped with leveling layer 3, is made on the basis of tamping road bed 1 by the leveling of leveling layer 3 With, can have a most basic smooth ability, leveling layer 3 or tamping road bed 1 upper surface are equipped with semi-rigid basal layer 4, and half Rigid substrate layer 4 plays the role of covering load in carrying, and rubble modified layer is equipped between semi-rigid basal layer 4 and tamping road bed 1 5, described tamping road bed 1, it is trapezoidal structure that leveling layer 3, rubble modified layer 5 and semi-rigid basal layer 4, which form section, and is located at The distance between 4 side of semi-rigid basal layer of trapezoidal top and base's barricade 2 are 5~10cm, and are filled in this gap The lime stone fine aggregate layer 12 of lime stone fine aggregate layer 12, filling can pass through the mutual rolling and rubbing action reality between particle The dispersion of existing bearing capacity and shearing force reduces the work of direct road pavement structure to distribute it on ground and base's barricade 2 With.

It is successively arranged graded broken stone transition zone 6 and pitch graded broken stone base 7 in semi-rigid 4 upper surface of basal layer, Crushed stone can effectively avoid base course crack and impact to other levels, in pitch while increasing road surface bearing strength 7 upper surface of graded broken stone base is successively arranged middle surface layer 8 and superficial layer 9.

As preferred embodiment, semi-rigid basal layer 4 with a thickness of 5~10cm；Rubble modified layer 5 with a thickness of 0 ~15cm；Graded broken stone transition zone 6 with a thickness of 15~20cm；Pitch graded broken stone base 7 with a thickness of 10~24cm；Middle face Layer 8 with a thickness of 5~7cm；Superficial layer 9 with a thickness of 3~5cm.By improving the thickness ratio between each layer, wherein mainly logical The thickness for improving semi-rigid basal layer 4 and the depth locating for it are crossed, each layer of graded broken stone is provided while protecting roadbed Bearing basement can play the role of maximizing favourable factors and minimizing unfavourable ones.

Preferably, it is equipped with extension substrate 13 between the semi-rigid basal layer 4 and graded broken stone transition zone 6, passes through expansion Cross shear, is further converted to vertical load-carrying ability, improves holding for ground by the lateral extension effect for opening up substrate 13 By ability, extends 13 both ends of substrate and be directly arranged on nature ground, the graded broken stone transition zone 6 and pitch graded broken stone base 7 it is successively trapezoidal be located in extension substrate 13, the middle surface layer 8 and superficial layer 9 are sequentially arranged at pitch graded broken stone base in rectangle On layer 7.

In the present invention, the Asphalt Pavement with Flexible Base constructed by combined type, by reducing semi-rigid basal layer 4 Thickness, and sunk, on the one hand can reduce its intensity, still further aspect can be improved semirigid anti-crack ability and hold Loading capability, in addition, graded broken stone and asphalt macadam are arranged in substrate, can have steady by playing the bearing capacity of rubble Fixed basis can bear stronger vertical load, and load is distributed to roadbed up, gives full play to the non-linear of gradation mechanics Feature.

In addition, in the present invention, main advantage is that two aspects:

First, by improving barrier wall structure, and semirigid support construction is remained at the same time, can utilize semi-rigid Property structural defence roadbed while can also overcome its water damage structural defect, road surface can be improved by maximizing favourable factors and minimizing unfavourable ones The effect of anti-pressure ability and crack resistence；

Second, it is applied in combination by knockdown graded broken stone, takes full advantage of the mechanic nonlinearity feature of rubble, protecting The anti-rolling ability of substrate can also be improved while demonstrate,proving drainage performance；

Third improves the discharge structure of substrate, drain it can also in time while having rigidity carrying, avoids water Damage.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

Claims (4)

1. a kind of asphalt pavements with flexible bases, it is characterised in that: including tamping road bed (1) and be located at tamping road bed (1) two Base's barricade (2) of side, tamping road bed (1) surface are equipped with leveling layer (3), on the leveling layer (3) or tamping road bed (1) Surface is equipped with semi-rigid basal layer (4), and rubble modified layer is equipped between the semi-rigid basal layer (4) and tamping road bed (1) (5), graded broken stone transition zone (6) and pitch graded broken stone base are successively arranged in semi-rigid basal layer (4) upper surface (7), middle surface layer (8) and superficial layer (9) are successively arranged in pitch graded broken stone base (7) upper surface；

Wherein, semi-rigid basal layer (4) with a thickness of 5~10cm；

Rubble modified layer (5) with a thickness of 0~15cm；

Graded broken stone transition zone (6) with a thickness of 15~20cm；

Pitch graded broken stone base (7) with a thickness of 10~24cm；

Middle surface layer (8) with a thickness of 5~7cm；

Superficial layer (9) with a thickness of 3~5cm.

2. a kind of asphalt pavements with flexible bases according to claim 1, it is characterised in that: base's barricade (2) Several equidistant water seepage holes (10) are equipped with, and the water seepage hole (10) two sides are fixedly installed with the densification in outer gibbosity Filter screen (11).

3. a kind of asphalt pavements with flexible bases according to claim 1, it is characterised in that: tamping road bed (1), Leveling layer (3), rubble modified layer (5) and semi-rigid basal layer (4) composition section are trapezoidal structure, and are located at trapezoidal top The distance between semi-rigid basal layer (4) side and base's barricade (2) are 5~10cm, and are filled with lime stone in this gap Fine aggregate layer (12).

4. a kind of asphalt pavements with flexible bases according to claim 1, it is characterised in that: the semi-rigid basal layer (4) extension substrate (13) is equipped between graded broken stone transition zone (6), extension substrate (13) both ends are directly arranged in naturally On base, successively trapezoidal be located at extends on substrate (13) for the graded broken stone transition zone (6) and pitch graded broken stone base (7), The middle surface layer (8) and superficial layer (9) are sequentially arranged on pitch graded broken stone base (7) in rectangle.