CN217579565U - Permanent road surface structure and road surface based on flip-chip formula infrastructure - Google Patents
Permanent road surface structure and road surface based on flip-chip formula infrastructure Download PDFInfo
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- CN217579565U CN217579565U CN202122870227.XU CN202122870227U CN217579565U CN 217579565 U CN217579565 U CN 217579565U CN 202122870227 U CN202122870227 U CN 202122870227U CN 217579565 U CN217579565 U CN 217579565U
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Abstract
The utility model belongs to the technical field of road engineering, especially, relate to a permanent road surface structure based on flip-chip formula infrastructure. The pavement structure sequentially comprises an asphalt layer, an asphalt stabilized macadam layer, an asphalt anti-cracking layer and a cement stabilized macadam base layer from top to bottom; the asphalt layer comprises an upper layer and a lower layer which are connected by a waterproof bonding layer; the asphalt stabilizing crushed stone layer comprises an upper layer and a lower layer, and the upper layer and the lower layer of the asphalt stabilizing crushed stone layer and other layers are connected through non-stick wheel adhesive layers; the cement stabilized macadam base layer comprises an upper base layer, a lower base layer and a subbase layer; the asphalt crack resistant layer is connected with the upper base layer through the asphalt permeable layer, the upper base layer is connected with the lower base layer through the asphalt permeable layer, and the dry cement layer is arranged between the lower base layer and the subbase layer. The utility model discloses a structural destruction does not take place for the structure during design life, and the damage on road surface only takes place on the top layer, only needs to carry out daily maintenance, need not carry out structural overhaul.
Description
Technical Field
The utility model belongs to the technical field of road engineering, especially, relate to a road surface structure based on flip-chip formula infrastructure.
Background
At present, asphalt pavements built in China have a plurality of technical problems. Such as rutting, low temperature shrinkage cracking, fatigue cracking, reflective cracking, etc., all of which affect the useful life of the asphalt pavement. One of the main reasons for these problems is that the road surface structure is not designed properly, the bearing capacity is not strong, the durability is not sufficient, and the expected service life is difficult to achieve. In the highway built in China, the pavement structure of the highway is greatly different. On one hand, the structure is single, mainly takes the semi-rigid base pavement as the main part, and on the other hand, the design of the pavement structure is unreasonable, which causes the waste of larger materials and funds. The permanent asphalt pavement structure is designed for the development of the expressway in China in future according to the practical situation, structural damage does not occur in the design life, the damage of the pavement only occurs on the surface functional layer, only daily maintenance is needed, structural overhaul is not needed, the service life of the pavement can be greatly prolonged, the life cycle cost is saved, the time of traffic jam caused by maintenance is shortened, and the permanent asphalt pavement structure has very important social and economic benefits. Therefore, the establishment of permanent asphalt pavement structure is a great trend in urban road construction and development.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The to-be-solved technical problem of the utility model is to provide a permanent bituminous paving structure to 15 years are no less than to superficial layer life, and other structural layer design life reaches more than 40 years as main design target. In the design life-span, structural damage does not take place, and the damage on road surface only takes place in the surperficial functional layer, only needs carry out daily maintenance, need not carry out the structural overhaul, does not need to overhaul main bearing layer promptly. The negative impact on society and economy caused by frequent road maintenance can be reduced.
(II) technical scheme
The utility model provides a permanent pavement structure based on a flip-chip base structure, which comprises an asphalt layer, an asphalt stabilized macadam layer, an asphalt anti-cracking layer and a cement stabilized macadam base layer from top to bottom in sequence;
the asphalt layer comprises an upper layer and a lower layer which are connected by a waterproof bonding layer; the asphalt stabilizing crushed stone layer comprises an upper layer and a lower layer, and the upper layer and the lower layer of the asphalt stabilizing crushed stone layer and other layers (such as an asphalt layer and an asphalt anti-cracking layer) are connected through non-stick wheel bonding layers; the cement stabilized macadam base layer comprises an upper base layer, a lower base layer and a subbase layer; the asphalt crack resistant layer is connected with the upper base layer through the asphalt permeable layer, the upper base layer is connected with the lower base layer through the asphalt permeable layer, and the dry cement layer is arranged between the lower base layer and the subbase layer.
In the utility model, the upper and lower layers of the asphalt layer are an upper asphalt layer and a lower asphalt layer, the upper asphalt layer is positioned on the lower asphalt layer, and a waterproof bonding layer is arranged between the upper asphalt layer and the lower asphalt layer; the upper and lower two-layer asphalt stabilized gravel layer is the upper asphalt stabilized gravel layer and the lower asphalt stabilized gravel layer, and the upper asphalt stabilized gravel layer is located on the lower asphalt stabilized gravel layer.
Preferably, the main performance indexes of the mixture for preparing the upper asphalt layer are as follows: the dynamic stability at 60 ℃ is more than or equal to 8000 times/mm; the dynamic stability at 70 ℃ is more than or equal to 3000 times/mm; the residual stability is more than or equal to 90 percent, and the freeze-thaw residual strength ratio is more than or equal to 85 percent; the low-temperature bending failure strain is more than or equal to 3200 mu epsilon; the freezing test is more than or equal to-28 ℃; the dynamic compression modulus is 7500-12000MPa.
Further preferably, the upper asphalt layer is prepared from SRA-13 rubber powder composite modified asphalt, and the thickness of the upper asphalt layer is 3-5 cm.
Preferably, the main performance indexes of the mixture for preparing the lower asphalt layer are as follows: the dynamic stability at 60 ℃ is more than or equal to 12000 times/mm; the dynamic stability at 70 ℃ is more than or equal to 4500 times/mm; the residual stability is more than or equal to 85 percent, and the freeze-thaw residual strength ratio is more than or equal to 80 percent; the low-temperature bending failure strain is more than or equal to 3000 mu epsilon; the dynamic modulus is 9500-13500 MPa.
Further preferably, the lower asphalt layer is prepared from HMRA-20 rubber powder composite modified asphalt, and the thickness of the lower asphalt layer is 6-8 cm.
Preferably, the waterproof bonding layer is prepared from rubber fiber reinforced asphalt, and the spreading amount is 1.5-1.8kg/m 2 。
Preferably, the tensile strength of the waterproof bonding layer is more than or equal to 1Mpa; the elongation at break is more than or equal to 800 percent; the bonding strength with the cement concrete is more than or equal to 0.6Mpa.
Preferably, the asphalt stabilized macadam layer is prepared from crack-resistant rubber powder modified asphalt stabilized macadam; the thickness of the upper layer and the lower layer is consistent and is between 6 and 10cm.
More preferably, the dynamic modulus of the anti-cracking rubber powder modified asphalt stabilized crushed stone material is 7000-11000 MPa
Preferably, the wheel-sticking-resistant adhesive layer is prepared from wheel-sticking-resistant modified emulsified asphalt, and the spreading amount is 0.4-0.6kg/m 2 。
Preferably, the adhesive force of the non-stick wheel adhesive layer at 25 ℃ has the drawing strength of more than or equal to 1.0Mpa, the drawing strength of the composite part at 25 ℃ is more than or equal to 0.35MPa, and the non-stick wheel has the wheel sticking performance at 60 ℃; the spraying amount is 0.4-0.6kg/m 2 。
Preferably, the thickness of the asphalt crack-resistant layer is 2-3 cm.
Further preferably, the main performance indexes of the mixture for preparing the asphalt anti-cracking layer are as follows: the stability is more than or equal to 2000 times/mm; the residual stability is more than or equal to 90 percent, and the freeze-thaw residual strength ratio is more than or equal to 85 percent; wen Wanqu a failure strain of not less than 6500 mu epsilon; the fatigue life is 950 mu epsilon more than or equal to 400000 times.
Preferably, the upper base layer is prepared from high-shear strength graded broken stones, and the thickness of the upper base layer is 16-18 cm;
further preferably, the upper base layer mixture is doped with polypropylene fibers and a small amount of emulsified asphalt or cement (within 1.5%), and the main performance indexes are as follows: CBR is more than or equal to 300; the modulus is more than or equal to 350MPa; the cohesive force C (Kpa) is more than or equal to 170Kpa.
Preferably, the lower base layer is prepared from anti-cracking cement stabilized macadam, and the thickness of the lower base layer is 18-20 cm;
further preferably, the main performance indexes of the lower base layer mixture are as follows: the strength of the mixture is 5-7 MPa; the anti-scouring coefficient is less than or equal to 10g; the strength of the 28d mixture is 6-8 MPa.
Preferably, the subbase layer is prepared from anti-cracking cement-stabilized macadam, and the thickness of the subbase layer is 18-20 cm.
Further preferably, the main performance indexes of the subbase mixture are as follows: the strength of the mixture is 3-5 MPa, and the anti-scouring coefficient is less than or equal to 10g; the strength of the 28d mixture is 4-6 MPa.
Preferably, the asphalt permeable layer is prepared by high-permeability modified emulsified asphalt, and the spreading amount is 1.0-1.5kg/m 2 。
Further preferably, the content of residues in the raw materials for preparing the asphalt permeable layer is more than or equal to 50 percent, and the penetration depth is more than or equal to 10mm; the spraying amount is 1.0-1.5kg/m 2 。
Another object of the utility model is to protect the road surface of the road surface structure, the road surface still includes the soil matrix, subbase among the road surface structure is fixed in on the soil matrix.
The utility model discloses following beneficial effect has:
the utility model discloses structural relation, thickness ratio or thickness to each level in the shop front structure have carried out reasonable setting. The pavement structure is thick, so the initial construction cost of the pavement structure is possibly higher, but only daily maintenance is needed, and structural overhaul is not needed, so the maintenance cost is low, and the pavement structure is most economical in the life cycle.
The structural relation, thickness or the thickness ratio of shop front structure to each level of this embodiment have carried out reasonable setting, when satisfying urban road surface and bearing the needs, have practiced thrift the consumptive material better, have saved the construction cost of shop front structure, have important economic benefits and application and popularization value in the construction of novel shop front road structure.
The utility model adopts the theory of elastic layer system to analyze the stress-strain condition of each structural layer, and determines the modulus and thickness required by each structural layer by controlling the tensile strain at the bottom of the asphalt layer, the compressive strain at the top surface of the roadbed, and the like, and selects the type of the asphalt mixture and designs the gradation according to the indexes such as the modulus required to be satisfied by each structural layer; furthermore, a permanent pavement structure combination scheme based on the inverted base layer structure is provided based on key design indexes on the principle that new road material innovation drives permanent pavement structure optimization.
Drawings
FIG. 1 is a schematic structural view of a permanent asphalt pavement structure according to an embodiment of the present invention;
wherein, 1 is an upper asphalt layer; 2. is a waterproof bonding layer; 3. the lower asphalt layer; 4. is a non-stick wheel adhesive layer a; 5. an upper asphalt stable crushed stone layer; 6. the non-stick wheel is a non-stick wheel layer b; 7. a lower asphalt stabilized gravel layer; 8. the non-stick wheel is a non-stick wheel layer c; 9. is an asphalt crack resistant layer; 10. an asphalt permeable layer a; 11. an upper base layer; 12. a bitumen permeable layer b; 13. a lower base layer; 14. a layer of dry cement; 15. an underlayer; 16. and (7) soil foundation.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.
It should be noted that the structure of the present invention is based on the principle of using new road material to reform and drive the permanent pavement structure optimization, and the scheme of the permanent pavement structure is proposed based on key design indexes.
Example 1
As shown in fig. 1, the present embodiment provides a permanent asphalt pavement structure, which includes an upper asphalt layer 1, a waterproof bonding layer 2, and a lower asphalt layer 3 in this order from the top layer downward; the asphalt-stabilized gravel layer comprises an anti-sticking wheel adhesive layer a 4, an upper asphalt-stabilized gravel layer 5, an anti-sticking wheel adhesive layer b 6 and a lower asphalt-stabilized gravel layer 7; a non-stick wheel adhesive layer c 8; an asphalt anti-cracking layer 9; an asphalt permeable layer a 10; an upper base layer 11; an asphalt permeable layer b 12; a lower base layer 13; a layer of dry cement 14; an underlayer 15.
Wherein, the upper and lower layers need to use rubber fiber reinforced modified asphalt waterproof bonding layer with spreading amount of 1.5-1.8kg/m 2 (ii) a The surface layer and the asphalt stabilized macadam layer, the double-layer asphalt stabilized macadam layer, the asphalt stabilized macadam layer and the special asphalt crack-resistant layer are connected by using the high-performance non-stick wheel modified emulsified asphalt bonding layer, and the spreading amount is 0.4-0.6kg/m 2 (ii) a High-permeability modified emulsified asphalt permeable layers are required to be arranged between the crack-resistant layer and the base layer of the special asphalt and between the upper base layer and the lower base layer for interlayer connection, and the spraying amount is 1.0-1.5kg/m 2 。
Example 2
This example relates to a road surface comprising the road surface structure of example 1, differing from example 1 only in that the lower part of the sub-base layer is a soil foundation 16.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Although the invention has been described in detail in the foregoing by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that certain modifications and improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention without departing from the spirit thereof.
Claims (10)
1. A permanent pavement structure based on a flip-chip base structure is characterized by sequentially comprising an asphalt layer, an asphalt stabilized macadam layer, an asphalt anti-cracking layer and a cement stabilized macadam base layer from top to bottom;
the asphalt layer comprises an upper layer and a lower layer which are connected by a waterproof bonding layer; the asphalt stabilizing crushed stone layer comprises an upper layer and a lower layer, and the upper layer and the lower layer of the asphalt stabilizing crushed stone layer and other layers are connected through non-stick wheel adhesive layers; the cement stabilized macadam base layer comprises an upper base layer, a lower base layer and a subbase layer; the asphalt crack-resistant layer is connected with the upper base layer through the asphalt permeable layer, the upper base layer is connected with the lower base layer through the asphalt permeable layer, and the dry cement layer is arranged between the lower base layer and the subbase layer.
2. A pavement structure as claimed in claim 1, characterized in that the performance criteria of the mix from which the upper bituminous layer is prepared are: the dynamic stability at 60 ℃ is more than or equal to 8000 times/mm; the dynamic stability at 70 ℃ is more than or equal to 3000 times/mm; the residual stability is more than or equal to 90 percent, and the freeze-thaw residual strength ratio is more than or equal to 85 percent; the low-temperature bending failure strain is more than or equal to 3200 mu epsilon; the freezing test is more than or equal to-28 ℃; the dynamic compression modulus is 7500-12000Mpa;
and/or the thickness of the upper asphalt layer is 3-5 cm.
3. A pavement structure according to claim 1 or 2, characterized in that the performance criteria of the mix for preparing the lower asphalt layer are: the dynamic stability at 60 ℃ is more than or equal to 12000 times/mm; the dynamic stability at 70 ℃ is more than or equal to 4500 times/mm; the residual stability is more than or equal to 85 percent, and the freeze-thaw residual strength ratio is more than or equal to 80 percent; the low-temperature bending failure strain is more than or equal to 3000 mu epsilon; the dynamic modulus is 9500-13500 MPa;
and/or the thickness of the lower asphalt layer is 6-8 cm.
4. A pavement structure according to claim 3, characterized in that said water-resistant bonding layer is made of rubber-modified asphalt and is spread in an amount of 1.5-1.8kg/m 2 ；
And/or the tensile strength of the waterproof bonding layer is more than or equal to 1Mpa; the elongation at break is more than or equal to 800 percent; the bonding strength with the cement concrete is more than or equal to 0.6Mpa.
5. The pavement structure of claim 4, wherein the asphalt stabilized macadam layer is prepared from crack resistant mastic modified asphalt stabilized macadam; the thickness of the upper layer and the lower layer is consistent and is 6-10 cm;
and/or the dynamic modulus of the mixture for preparing the asphalt stable gravel layer is 7000-11000 MPa.
6. The pavement structure according to claim 5, wherein the wheel-bonding-free adhesive layer is prepared from wheel-bonding-free modified emulsified asphalt and is spread in an amount of 0.4 to 0.6kg/m 2 ；
And/or the adhesive force drawing strength of the non-stick wheel adhesive layer at 25 ℃ is more than or equal to 1.0MPa, the drawing strength of the composite part at 25 ℃ is more than or equal to 0.35MPa, and the non-stick wheel is not stuck when the wheel sticking performance is 60 ℃.
7. The pavement structure according to claim 6, wherein the thickness of the asphalt crack-resistant layer is 2 to 3cm;
and/or the performance indexes of the mixture for preparing the asphalt anti-cracking layer are as follows: the stability is more than or equal to 2000 times/mm; the residual stability is more than or equal to 90 percent, and the freeze-thaw residual strength ratio is more than or equal to 85 percent; wen Wanqu the failure strain is not less than 6500 mu epsilon; the fatigue life is 950 mu epsilon more than or equal to 400000 times.
8. The pavement structure according to claim 1 or 7, wherein the upper base layer is prepared from high shear strength graded crushed stones, the thickness of the upper base layer is 16-18 cm, and the performance indexes of the prepared upper base layer mixture are as follows: CBR is more than or equal to 300; the modulus is more than or equal to 350MPa; the cohesive force C is more than or equal to 170kpa;
and/or the lower base layer is prepared from anti-cracking cement-stabilized macadam, and the thickness of the lower base layer is 18-20 cm; the performance indexes of the prepared mixture of the lower base layer are as follows: the strength of the mixture is 5-7 MPa; the anti-scouring coefficient is less than or equal to 10g; the strength of the 28d mixture is 6-8 MPa
And/or the subbase layer is prepared from anti-cracking cement stabilized macadam, and the thickness of the subbase layer is 18-20 cm; the performance indexes for preparing the subbase mixture are as follows: the strength of the mixture is 3-5 MPa, and the anti-scouring coefficient is less than or equal to 10g; the strength of the 28d mixture is 4-6 MPa.
9. The pavement structure of claim 8The structure is characterized in that the asphalt permeable layer is prepared by high-permeability modified emulsified asphalt, and the spraying amount is 1.0-1.5kg/m 2 ；
And/or the content of residues in the raw materials for preparing the asphalt permeable layer is more than or equal to 50 percent, and the penetration depth is more than or equal to 10mm; the spraying amount is 1.0-1.5kg/m 2 。
10. A pavement comprising the pavement structure of any of claims 1 to 9, further comprising a soil foundation to which the sub-base layer of the pavement structure is fixed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122870227.XU CN217579565U (en) | 2021-11-22 | 2021-11-22 | Permanent road surface structure and road surface based on flip-chip formula infrastructure |
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| CN202122870227.XU CN217579565U (en) | 2021-11-22 | 2021-11-22 | Permanent road surface structure and road surface based on flip-chip formula infrastructure |
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| CN217579565U true CN217579565U (en) | 2022-10-14 |
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Effective date of registration: 20230509 Address after: 100088 Beijing city Haidian District Xitucheng Road No. 8 Patentee after: BEIJING ZHONGLU GAOKEHIGHWAY TECHNOLOGY Co.,Ltd. Patentee after: CHINA COMMUNICATIONS CONSTRUCTION JIJIAO EXPRESSWAY INVESTMENT DEVELOPMENT Co.,Ltd. Address before: 100088 Beijing city Haidian District Xitucheng Road No. 8 Patentee before: BEIJING ZHONGLU GAOKEHIGHWAY TECHNOLOGY Co.,Ltd. |
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