CN112411298A

CN112411298A - Load-bearing porous drainage asphalt concrete surface layer structure and construction method thereof

Info

Publication number: CN112411298A
Application number: CN202011255566.0A
Authority: CN
Inventors: 杨建新
Original assignee: Jiangsu Zhongda Construction Engineering Co ltd
Current assignee: Jiangsu Zhongda Construction Engineering Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-02-26

Abstract

The utility model belongs to the technical field of the technique of road construction structure and specifically relates to a porous drainage asphalt concrete surface course structure of bearing type is related to, include by supreme firm basic unit that sets up on road surface down, set up the supporting layer in firm basic unit top and set up the permeable bed at the supporting layer upper surface, firm basic unit is equipped with two about road length direction's central line symmetry, it permeates water the clearance to leave between two adjacent firm basic units, two firm basic units are highly increased gradually to the edge by the middle of the road, the height that highly is less than or equal to on the surface of permeable bed stabilizes the height of basic unit upper surface. This application has the effect that improves road stability when guaranteeing road drainage performance.

Description

Load-bearing porous drainage asphalt concrete surface layer structure and construction method thereof

Technical Field

The application relates to the technical field of road construction structures, in particular to a bearing type porous drainage asphalt concrete surface layer structure and a construction method thereof.

Background

With the high-speed development of Chinese economy, Chinese capital construction has not developed before, wherein the most rapid development belongs to road traffic construction engineering. The pavement structure of roads in the related art is generally classified into a concrete pavement and an asphalt concrete pavement. The concrete pavement is formed by directly paving cement concrete, has higher rigidity and poorer drainage property, and is easy to generate stress fracture in the using process; the asphalt concrete pavement is a semi-rigid pavement which has good drainage performance but general bearing capacity.

The prior Chinese patent with the granted publication number of CN105862542B discloses a small-particle-size large-pore multilayer drainage asphalt pavement structure, which comprises a drainage asphalt concrete PAC-16 lower surface layer, a drainage asphalt concrete PAC-10 middle surface layer and a drainage asphalt concrete PAC-5 upper surface layer which are sequentially arranged from bottom to top; wherein, the lower surface layer of the drainage asphalt concrete PAC-16, the middle surface layer of the drainage asphalt concrete PAC-10 and the upper surface layer of the drainage asphalt concrete PAC-5 are paved by drainage asphalt mixture, and the drainage asphalt mixture is formed by mixing binder and aggregate. The multilayer drainage asphalt pavement structure ensures the thickness of the pavement, prolongs the durability of the porous asphalt pavement, and has more excellent drainage and noise reduction effects.

The related technology adopts the construction of the drainage concrete, so that the porosity of the road is improved, and the drainage performance of the asphalt pavement is improved; however, the existing roads distributed on some transportation main roads need to pass through a great number of heavy transportation vehicles every day, the pressure borne by the roads is very large, after the road surface is subjected to large pressure, the pressure can be transmitted downwards and to the two sides of the road, and an asphalt layer serving as the surface layer of the road surface is easily squeezed and deformed, so that the road surface is damaged.

In view of the above-mentioned related technologies, the inventor believes that it is difficult for roads in the related technologies to simultaneously meet the unification of drainage performance and load-bearing performance, and it is difficult to adapt to areas with high precipitation and high traffic intensity.

Disclosure of Invention

In order to improve the bearing capacity of the road pavement while ensuring the pavement drainage performance, the application provides a bearing type porous drainage asphalt concrete surface layer structure and a construction method thereof.

In a first aspect, the application provides a porous drainage asphalt concrete surface course structure of bearing type adopts following technical scheme:

the utility model provides a porous drainage asphalt concrete surface course structure of bearing type, includes by supreme setting up at the firm basic unit of road surface, setting up the supporting layer in firm basic unit top and set up the permeable bed at the supporting layer upper surface down, firm basic unit is equipped with two about road length direction's central line, leaves the clearance of permeating water between two adjacent firm basic units, two firm basic units is by the road in the middle of to the marginal height increase gradually, the height that highly is less than or equal to on the surface of permeable bed stabilizes the basic unit upper surface.

By adopting the technical scheme, after the road is formed, when the road surface is subjected to downward rolling force of a vehicle, the rolling force of the part is firstly borne by the water permeable layer, then is downwards transmitted to the supporting layer and finally is transmitted to the stable base layer, because the height of the stable base layer from the middle of the road to the edge of the road is gradually increased, in the process of downwards transmitting the rolling force to the stable base layer, the vertical downward force borne by the supporting layer can be disassembled into the vertical downward component force which is independently borne by the supporting layer and the force which acts on the surface of the stable base layer, so that the supporting layer can transmit the rolling force to the stable base layer below without bearing complete rolling force, the stress of the supporting layer in the transmission process of the rolling force is effectively reduced, the supporting layer can bear larger pressure, and the service life of the supporting layer is prolonged; moreover, the supporting layer is positioned between the two stable base layers, and the supporting layer and the permeable layer are limited by the stable base layers, so that the transmission of the rolling force along the horizontal direction of the supporting layer and the permeable layer is reduced, the damage caused by the major deformation of the supporting layer and the permeable layer is reduced, the damage of the pavement structure is reduced, and the service life of the pavement is prolonged; finally, firm basic unit slope sets up for the rainwater permeates to permeating water in the clearance faster after permeable bed and supporting layer, and then makes the faster infiltration road surface of road surface's rainwater, improves the drainage performance on road surface.

Optionally, an organic whole is connected with between the bottom of two adjacent firm basic units and strengthens the base, it is equipped with a plurality ofly along the length direction interval of firm basic unit to strengthen the base.

Through adopting above-mentioned technical scheme, strengthen the base and when initial preparation stabilizes the basic unit integrative watering shaping promptly, strengthen the base will be located the road length direction central line both sides two stabilize between the basic unit be connected more stable to make when rolling the firm basic unit of below is transmitted through the supporting layer, the steadiness between two firm layers is stronger, effectively improves road structure's bulk strength.

Optionally, the surface of the stabilizing base layer is provided with a connecting layer for enhancing the connection tightness between the stabilizing base layer and the supporting layer, and the connecting layer is corrugated.

Through adopting above-mentioned technical scheme, the area of contact between firm basic unit and the supporting layer has been improved to make the more firm connection of supporting layer on the surface of firm basic unit, effectively reduce the supporting layer and take place the condition of displacement along each direction of firm basic unit, and then make the overall structure condition of supporting layer comparatively stable, improved the steadiness of supporting layer, improved the life of supporting layer.

Optionally, two one side that firm basic unit deviates from mutually is equipped with firm dado, firm dado is crescent from top to bottom.

Through adopting above-mentioned technical scheme, when receiving the supporting layer and stablizing the extrusion force of basic unit perpendicularly on the basic unit upper surface and stablizing perpendicularly, firm dado has effectively improved the stability of firm basic unit, and then effectively improves the intensity of firm basic unit to improve road structure's intensity, further improved the bearing capacity of road.

Optionally, the firm basic unit adopts high density concrete placement to form, two the top of the back of one side of firm basic unit all is equipped with the protection shoulder, two pavement layer has been laid between the protection shoulder, vertical link up on the pavement layer is equipped with the wash port, the height on pavement layer equals the height of protection shoulder.

By adopting the technical scheme, the stable base layer is only used for supporting, the pavement layer has a certain thickness, and can be conveniently repaired when the pavement layer breaks down in the later use process, so that the service life of the road is effectively prolonged; the drainage holes are convenient for rainwater to quickly fall to the permeable layer and the supporting layer below and finally drain to the soil body below through the drainage gaps.

Optionally, a drainage groove is formed in the stable base layer, the length direction of the drainage groove is parallel to the width direction of the stable base layer, the width of the drainage groove is gradually increased from bottom to top, and the upper surface of the drainage groove penetrates through the drainage groove and is provided with a slow seepage layer.

Through adopting above-mentioned technical scheme, the rainwater falls the firm basic unit of below from road surface and drainage blanket, can be more effectual discharges moisture through hydrophobic groove, reduces the long-term persistence of moisture between firm basic unit and supporting layer for the quick drainage of moisture, thereby further improved road structure's drainage effect.

Optionally, a water passing groove penetrates through the stable base layer and penetrates through the stable protection wall.

Through adopting above-mentioned technical scheme, in heavy rain weather such as rainy season, the volume of rainwater is great, and unnecessary rainwater can be comparatively convenient discharge underground drainage system from the limbers, can the inside ponding of effectual reduction road, further ensured road pavement structure's drainage.

In a second aspect, the application provides a construction method based on the bearing type porous drainage asphalt concrete surface layer structure, which includes the following steps:

s1, lofting, and processing and checking the basic surface;

s2, erecting the template and installing the steel bar;

s3, preparing a concrete raw material, paving, vibrating and forming a stable base layer and a reinforced base, and reserving a drainage tank and a water passing tank;

s4, manufacturing a connecting layer, after the connecting layer is formed, erecting a template, and paving, vibrating and forming a supporting layer and a permeable layer;

and S5, paving a pavement layer and reserving a drainage hole.

Optionally, the pavement layer adopts asphalt concrete to adopt the ready-mixed molding mode, directly lays after accomplishing with the certain proportion ready-mixed, strengthen base and firm basic unit integrated into one piece when the pave.

By adopting the technical scheme, the asphalt concrete is directly pre-mixed in the mixing plant without on-site mixing, and then is transported to the site by using the mixer truck for directly spreading, so that the working time is saved, the working efficiency is effectively improved, and the stability of the pavement structure is improved by integrally spreading and forming.

In summary, the present application includes at least one of the following beneficial technical effects:

the stable base layers are arranged on the two sides of the center line of the length direction of the road surface, the permeable gaps are reserved between the stable base layers, the stable base layers are gradually inclined and raised from the middle of the road to the two sides of the width direction of the road, the supporting layers and the permeable layers are positioned between the stable base layers, so that part of vertical downward force applied to the road surface can be vertically dispersed on the stable base layers, and moisture permeates from the permeable gaps, so that the stability of the road is improved while the water permeability of the road surface is ensured;

the reinforcing base is arranged between the two symmetrical stabilizing base layers, and the stabilizing protection wall and the protection shoulder are arranged at the top end of the surface, which is opposite to the two reinforcing base layers, of the two reinforcing base layers, so that the stabilizing base layers can bear the pressure vertical to the inclined surface of the stabilizing base layer more fully and stably, and the stability of the stabilizing base layer is effectively improved;

through having seted up hydrophobic groove and water service groove on firm basic unit for moisture can be in time quick discharge, has effectively improved the drainage performance of road surface structure.

Drawings

FIG. 1 is an exploded schematic view primarily intended to show a pavement layer and a permeable layer in a pavement structure;

FIG. 2 is an exploded view of a support layer used primarily to show a pavement structure;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

Description of reference numerals: 1. stabilizing the base layer; 2. a support layer; 3. a water permeable layer; 4. a water permeable gap; 5. a reinforcing base; 6. a connecting layer; 7. stabilizing the protecting wall; 8. protecting the shoulder; 9. a pavement layer; 10. a drain hole; 11. a drainage tank; 12. a slow permeation layer; 13. a water trough.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Referring to fig. 1, the embodiment of the application discloses a load-bearing porous drainage asphalt concrete surface layer structure. This porous drainage asphalt concrete surface course structure of bearing type includes by supreme setting up firm basic unit 1 on road surface down, the supporting layer 2 and the permeable bed 3 of setting at supporting layer 2 upper surface of setting in firm basic unit 1 top set up, firm basic unit 1 is equipped with two about road length direction's central line, the length direction of the parallel road of length direction of firm basic unit 1, leave permeable gap 4 between two adjacent firm basic unit 1, and two firm basic unit 1 highly be the slope trend by the middle to the edge of road and increase gradually, highly the less than or equal to height of firm basic unit 1 upper surface on permeable bed 3's surface.

Referring to fig. 1, level an organic whole is pour between two adjacent firm basic units 1 and is strengthened base 5, strengthens the length direction of the perpendicular firm basic unit 1 of length direction of base 5, strengthens base 5 and is equipped with a plurality ofly along the length direction interval of firm basic unit 1, and supporting layer 2 then divide into the multistage, and every single supporting layer 2 corresponds two adjacent enhancement bases 5 settings to be located between two adjacent enhancement bases 5 adornments.

Referring to fig. 1, be equipped with the articulamentum 6 that is used for strengthening and is connected the compactness between supporting layer 2 on the slope surface of firm basic unit 1, articulamentum 6 is established to the corrugate, articulamentum 6 is equipped with a plurality ofly along the same interval of the length direction of firm basic unit 1, when the construction, when watering supporting layer 2 and permeable stratum 3, the corrugate articulamentum 6 is the inlay card just in supporting layer 2 and permeable stratum 3 to reduce the displacement of supporting layer 2 and permeable stratum 3, the overall stability of road surface structure has been improved.

Referring to fig. 2, a stabilizing retaining wall 7 is disposed on one side of each of the two stabilizing base layers 1, the length direction of the stabilizing retaining wall 7 is parallel to the length direction of the stabilizing base layer 1, the stabilizing retaining wall 7 is gradually increased from top to bottom, and the cross section of the stabilizing base layer 1 along the cross section perpendicular to the length direction is a right triangle. Firm basic unit 1 adopts high density concrete placement to form, and the equal an organic whole in the top of two firm basic units 1 that carry on the back one side from is equipped with protection shoulder 8, and the parallel length direction of firm basic unit 1 of length direction of protection shoulder 8 has laid pavement layer 9 between two protection shoulders 8, and vertical link up is equipped with wash port 10 on pavement layer 9, and pavement layer 9's highly equal protection shoulder 8's height. The protection shoulder 8 makes the pavement layer 9 when receiving decurrent pressure, and the protection shoulder 8 can be effectual live the pressure restriction of pavement layer 9 to reduce the pressure that pavement layer 9 received and radiate away along the width direction of pavement layer 9, thereby reduced pavement layer 9's damage, improved road surface structure's stability.

Referring to fig. 2 and 3, hydrophobic groove 11 has all been seted up on the inclined plane of two firm basic units 1, the parallel width direction who stabilizes basic unit 1 of length direction of hydrophobic groove 11, and hydrophobic groove 11 is equipped with a plurality ofly along the length direction interval of stabilizing basic unit 1, and the width of hydrophobic groove 11 is by supreme crescent down, and it has the slow layer 12 that oozes of rubble preparation to fill on hydrophobic groove 11. A water trough 13 is arranged in each drainage groove 11, the water trough 13 penetrates through the stable base layer 1 and the stable protection wall 7 at the same time and is obliquely arranged, and the height of a water outlet of the water trough 13 is lower than that of a water inlet. When the rainwater is too much, rivers trickle to the clearance 4 that permeates water along hydrophobic trough 11 more orderly to more orderly quick discharge, water trough 13 then makes when the rainwater is great, and the rainwater that is more than is arranged urban drainage system from water trough 13, has effectively slowed down the drainage pressure of road.

The embodiment of the application also provides a construction method based on the bearing type porous drainage asphalt concrete surface layer structure, which comprises the following steps:

s1, lofting, and processing and checking the basic surface;

s2, erecting the template and installing the steel bar;

s3, preparing concrete raw materials, paving, vibrating and forming the stable base layer 1 and the reinforcing base 5, and reserving a drainage tank 11 and a water passing tank 13;

s4, manufacturing the connecting layer 6, after the connecting layer 6 is formed, erecting a template, and paving, vibrating and forming the supporting layer 2 and the permeable layer 3;

and S5, paving a pavement layer 9, and reserving a drain hole 10.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a porous drainage asphalt concrete surface course structure of bearing type which characterized in that: including by supreme setting up firm basic unit (1) on road surface down, setting up supporting layer (2) and setting up permeable layer (3) at supporting layer (2) upper surface in firm basic unit (1) top, firm basic unit (1) is equipped with two about road length direction's central line, leaves permeable gap (4), two between two adjacent firm basic unit (1) is by the road in the middle of to the marginal height increase gradually, the height that highly is less than or equal to firm basic unit (1) upper surface on permeable layer (3) surface.

2. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 1, wherein: an organic whole is connected with between the bottom of two adjacent firm basic units (1) and strengthens base (5), it is equipped with a plurality ofly to strengthen base (5) along the length direction interval of firm basic unit (1).

3. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 2, wherein: the surface of the stable base layer (1) is provided with a connecting layer (6) for enhancing the connection tightness between the stable base layer and the supporting layer (2), and the connecting layer (6) is corrugated.

4. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 1, wherein: two one side that firm basic unit (1) deviates from mutually is equipped with firm dado (7), firm dado (7) from top to bottom crescent.

5. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 4, wherein: firm basic unit (1) adopts high density concrete placement to form, two the back of the body of firm basic unit (1) from the top of one side all is equipped with protection shoulder (8), two pavement layer (9) have been laid between protection shoulder (8), vertical link up is equipped with wash port (10) on pavement layer (9), the height that highly equals protection shoulder (8) of pavement layer (9).

6. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 5, wherein: it has hydrophobic groove (11) to seted up in firm basic unit (1), the length direction parallel width direction of firm basic unit (1) of hydrophobic groove (11), the width of hydrophobic groove (11) is by supreme crescent down, the upper surface of hydrophobic groove (11) link up hydrophobic groove (11) and is equipped with slowly oozing layer (12).

7. The load-bearing porous drainage asphalt concrete surface layer structure according to claim 6, wherein: the stable base layer (1) is provided with a water trough (13) in a penetrating mode, and the water trough (13) penetrates through the stable protection wall (7).

8. A construction method of a load-bearing porous drainage asphalt concrete surface layer structure based on the claim 7 is characterized by comprising the following steps:

s1, lofting, and processing and checking the basic surface;

s2, erecting the template and installing the steel bar;

s3, preparing concrete raw materials, paving, vibrating and forming a stable base layer (1) and a reinforced base (5), and reserving a drainage groove (11) and a water passing groove (13);

s4, pouring the connecting layer (6), after the connecting layer (6) is formed, erecting a template, and paving, vibrating and forming the supporting layer (2) and the water permeable layer (3);

and S5, paving a pavement layer (9) and reserving a drain hole (10).

9. The load-bearing porous drainage asphalt concrete surface course structure according to claim 8, wherein: pavement layer (9) adopt asphalt concrete and adopt the ready-mixed shaping mode, directly lay after accomplishing with the certain proportion ready-mixed, strengthen base (5) and firm basic unit (1) integrated into one piece when paving.