CN103215875B - A kind of anti-fatigue asphalt pavement based on differential settlement - Google Patents
A kind of anti-fatigue asphalt pavement based on differential settlement Download PDFInfo
- Publication number
- CN103215875B CN103215875B CN201310139183.0A CN201310139183A CN103215875B CN 103215875 B CN103215875 B CN 103215875B CN 201310139183 A CN201310139183 A CN 201310139183A CN 103215875 B CN103215875 B CN 103215875B
- Authority
- CN
- China
- Prior art keywords
- layer
- fatigue
- asphalt
- surface course
- basic unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Road Paving Structures (AREA)
Abstract
The invention provides a kind of anti-fatigue asphalt pavement based on differential settlement, it is characterized in that comprising asphalt surface course, anti-fatigue layer and graded broken stone base and cement stabilized macadam subbase, described asphalt surface course comprises surface course, middle surface layer and cutting optimal, described surface level is in the upper surface of described flexible pavement, described middle topping laying is below described surface course, described cutting optimal is layed in below described middle surface layer, described surface course, glutinous layer oil is sprayed between intermediate layer and cutting optimal, described anti-fatigue layer is layed in below described cutting optimal, glutinous layer oil is sprayed between anti-fatigue layer and cutting optimal, described basic unit is layed in below described anti-fatigue layer, priming oil is sprayed between basic unit and anti-fatigue layer, described subbase is layed in below described basic unit, described subbase is layed on the roadbed on ground.
Description
Technical field
The present invention relates to a kind of asphalt highway structure, particularly a kind of antifatigue bituminous highway road surface being applicable to differential settlement.
Background technology
In order to meet the Long-Time Service requirement on road surface, anti-fatigue asphalt pavement structure is promoted in worldwide.Full depth asphalt pavement and High Strength Asphalt Concrete making can be increased on graded broken stone fatigue life on road surface is thought by bitumen association of the U.S., and destruction possible for road surface is limited in the top layer of flexible pavement.Generally believe now, continuous reinforcement concrete adds the typical structure that bituminous concrete is Perpetual Pavement.
Since the eighties in 20th century, the development of highway in China cause is very rapid., especially in expressway construction the requirement of roadbed is also being improved constantly at the highway of China.Roadbed should ensure closely knit, even, stable, but due to the uncertainty of the factors such as geological conditions, weather hydrologic condition and construction technology, and roadbed, within Road Design application life, sedimentation (comprising uniform settlement and differential settlement) probably occurs.The acting in conjunction of the subsidiary stress that differential settlement produces in road structure and higher traffic loading, the road structure easily causing crack, depression, frost boiling etc. serious destroys.
The pavement design specification (such as " bituminous pavement design for highway specification " (JTG D50-2006)) of China only considers the impact of traffic loading mostly, considers less on the impact of settlement of subgrade.Research about the anti-fatigue asphalt pavement structure based on differential settlement is also rare.
Summary of the invention
The present invention be directed to the disappearance that above-mentioned prior art field exists, provide a kind of anti-fatigue asphalt pavement typical structure being applicable to differential settlement area, the problem of road surface structural deterioration when there is differential settlement with the roadbed solving anti-fatigue asphalt pavement, to reach in design service life the object that not recurring structure destroys.
The invention provides following technical scheme:
A kind of anti-fatigue asphalt pavement based on differential settlement, it is characterized in that comprising asphalt surface course, antifatigue, basic unit and subbase, described asphalt surface course comprises surface course, middle surface layer and cutting optimal, described surface level is in the upper surface of described flexible pavement, described middle topping laying is below described surface course, described cutting optimal is layed in below described middle surface layer, described surface course, glutinous layer oil is sprayed between intermediate layer and cutting optimal, described anti-fatigue layer is layed in below described cutting optimal, glutinous layer oil is sprayed between anti-fatigue layer and cutting optimal, described basic unit is layed in below described anti-fatigue layer, priming oil is sprayed between basic unit and anti-fatigue layer, described subbase is layed in below described basic unit, described subbase is layed on the roadbed on ground, described surface course adopts SMA-13 layer, described middle surface layer adopts Superpave-20 layer, described cutting optimal adopts Superpave-25 layer, described anti-fatigue layer adopts Superpave-12.5 layer, basic unit adopts graded broken stone layer, subbase adopts cement stabilized macadam layer, the maximum particle diameter of the rubble in described cement stabilized macadam layer is not more than 31.5mm, and adopt framework dense structure, cement employing label is portland cement or the Portland cement of 42.5, the initial setting time is required to be greater than 3h, final setting time is greater than 6h, cement consumption is 4% ~ 4.5%.
Further, the surface course of described asphalt surface course is the SMA-13 of 4cm, and wherein SMA-13 is stone mastic asphalt, and nominal maximum aggregate size is 13mm, gap grading; The middle surface layer of described asphalt surface course adopts the Superpave-20 material of 6cm, and nominal maximum aggregate size is 20mm; The cutting optimal of described asphalt surface course is the Superpave-25 material of 8cm, and nominal maximum aggregate size is 25mm.
Further, the anti-fatigue layer between surface layer and basic unit, adopt the bituminous mixture of 4 ~ 6cm, be Superpave-12.5 material, nominal maximum aggregate size is 12.5mm, and control bitumen content is optimum content+0.2%.
Further, described basic unit adopts the graded broken stone that 20cm is thick, and described subbase is the cement stabilized macadam that 20 ~ 30cm is thick, and wherein the modulus of elasticity of cement stabilized macadam controls between 1500MPa ~ 2000MPa.
Further, the macadam gradating of the cement stabilized macadam layer of described subbase is: the square hole screen being of a size of 31.5mm, rubble percent of pass is 100%, be of a size of the square hole screen of 19mm, rubble percent of pass is 80.7%, be of a size of the square hole screen of 9.5mm, rubble percent of pass is 52.6%, is of a size of the square hole screen of 4.75mm, and rubble percent of pass is 30.2%, be of a size of the square hole screen of 2.36mm, rubble percent of pass is 19.6%, is of a size of the square hole screen of 0.6mm, and rubble percent of pass is 11.4%, be of a size of the square hole screen of 0.075mm, rubble percent of pass is 2.8%.
The invention has the beneficial effects as follows: the present invention is the road structure that one is applicable to easy uneven settlement region (such as soft clay area), high-modulus cement stabilized macadam layer effectively can alleviate the impact of the subsidiary stress that differential settlement road pavement causes, and reduces the generation of pavement crack.Portland cement or Portland cement can ensure stablizing effect, and adopt the higher cement of strength grade suitably can improve the strength and modulus of this layer, selecting of framework dense structure makes this layer have better mechanical property.Graded broken stone layer can play the effect of good stress absorption, reduces the reflection crack of flexible pavement further.The flexible anti-fatigue layer of Superpave-12.5 has certain shear behavior, and reduces and suppress the generation of surface layer reflection crack further.Asphalt surface course of the present invention design, under the prerequisite ensureing evenness of road surface, stable, wear-resisting, antiskid, the impact of minimizing traffic load road pavement basic unit and roadbed.
Accompanying drawing explanation
Below with reference to accompanying drawing 1, the anti-fatigue asphalt pavement based on differential settlement of the present invention is described in detail.
Fig. 1 is a kind of flexible pavement typical structure based on differential settlement;
Fig. 2 is the framework dense structure schematic diagram of cement stabilized macadam layer of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
The present invention adopts thicker asphalt surface course, alleviates the effect of traffic load to roadbed, alleviates differential settlement.Road structure in the present invention, the surface course of described asphalt surface course is the SMA-13 of 4cm, wherein SMA-13 is stone mastic asphalt, nominal maximum aggregate size is 13mm, gap grading, this layer durable, stable, closely knit, smooth, and can meet the requirement of heavy traffic and high-temperature stability; The middle surface layer of described asphalt surface course mainly plays anastomosis, and adopt the Superpave-20 of 6cm, Superpave-20 is the abbreviation of Superior Performing Asphalt Pavement, high performance asphalt pavement, and nominal maximum aggregate size is 20mm; The cutting optimal of described asphalt surface course is the Superpave-25 of 8cm, and nominal maximum aggregate size is 25mm.Superpave, when Designing Asphalt Pavement, takes into full account the impact of temperature road pavement in the period of service, requires that road surface can meet high-temperature behavior requirement when the highest design temperature, does not produce excessive rut; When road surface minimum temperature, can Low temperature property requirements be met, avoid or reduce cold cracking; Fatigue cracking is controlled within the scope of normal temperature.
Be anti-fatigue layer below described surface layer, adopting the bituminous mixture of 4 ~ 6cm, is Superpave-12.5, it is high performance asphalt pavement material, nominal maximum aggregate size is 12.5mm, and this layer adopts above-mentioned thickness and nominal maximum aggregate size to make this layer be flexbile base, and modulus of elasticity is little.Control bitumen content is optimum content+0.2%, makes this layer have higher shear strength and excellent fatigue resistance, can effectively suppress and reduce the generation of asphalt pavement reflective cracking.
Basic unit below described anti-fatigue layer adopts the graded broken stone of thickness 20cm, subbase below described basic unit is the cement stabilized macadam of thickness 20 ~ 30cm, wherein cement stabilized macadam should have higher pressure-proof elasticity modulus, and its modulus of elasticity controls at 1500MPa ~ 2000MPa.Adopt the graded broken stone of above-mentioned size and modulus of elasticity and cement stabilized macadam to be combined and make this structure can play the compatible deformation of flexible graded broken stone, absorb the ability of stress, the high-modulus cement stabilized macadam below graded broken stone layer then has the ability alleviating differential settlement.The suitable raising of subbase cement stabilized macadam modulus of elasticity, can play the effect of homogenizing ground difference, reduce differential settlement to a certain extent.But the modulus of elasticity of cement stabilized macadam base is also unsuitable too high, otherwise over-burden easily to cause surface layer stress.
As shown in accompanying drawing 1 of the present invention, flexible pavement of the present invention has laying six layers altogether.SMA-13 layer, Superpave-20 layer, Superpave-25 layer, Superpave-12.5 anti-fatigue layer, graded broken stone layer and high-modulus cement stabilized macadam layer respectively.Wherein asphalt surface course comprises SMA-13 layer, Superpave-20 layer, Superpave-25 layer, and interlayer sprays glutinous layer oil, to connect between enhancement Layer.Anti-fatigue layer adopts Superpave-12.5 layer, and spray glutinous layer oil between anti-fatigue layer and cutting optimal, basic unit adopts graded broken stone layer, sprays priming oil between basic unit and anti-fatigue layer, and subbase adopts high-modulus cement stabilized macadam layer.
When laying flexible pavement of the present invention, first laying subbase cement stabilized macadam layer, closely knit, all even surfacing of sub-layer before laying, should be ensured.In existing " highway road surface construction technique normalizing ", high grade pavement is applied to for semi-rigid sub-base material and only requires compound 7 days compressive strength after immersion, and to modulus of elasticity without specific requirement.In the present invention, this layer is made to have higher modulus of elasticity by the control of the factors such as the framework structure type of the grating of cement stabilized macadam layer, cement consumption and compound, higher rigidity, intensity and globality, the ability of diffusion load is improved, can the inhomogeneous deformation of homogenizing roadbed.Described cement stabilized macadam layer is adopted and is prepared with the following method:
1 framework types and macadam gradating
First for preventing the compound generation segregation phenomenon of Large stone, the present invention ensures that the maximum particle diameter of rubble is not more than 31.5mm, and reduces the content of faller gill shape aggregate chips as far as possible; Secondly, the stabilization of cement can be played, make rubble can fully compacting again.This layer adopts framework dense structure, and the coarse aggregate of the existing some of this framework dense structure forms cage construction, goes in the space having again fine aggregate to be filled between coarse aggregate.More can reduce the amount of contraction of semi-rigid type base than other structures, increase its tear factor, improve scour resistance, there is better mechanical property.
In the present invention, cement stabilized macadam adopts framework dense structure as shown in Figure 2, and along with the increase of content of coarse aggregate in compound, the skeleton embedded squeezing structure of coarse aggregate in mixture structure strengthens, and compressive strength and compression rebound modulu increase.In addition, fine aggregate content also has a great impact Cement Treated Material, and as fine aggregate content is higher, the education resistance energy of material, easily compression performance etc. are better, but fines meeting on the high side causes surface layer stress, and over-burden.Consider, in the present invention, the macadam gradating of cement stabilized macadam layer is as follows:
Cement stabilized macadam layer adopts above-mentioned macadam gradating, the compressive strength of cement stabilized macadam layer of the present invention, compression rebound modulu, education resistance energy and easy compression performance is made to realize balancing each other, make the inhomogeneous deformation of roadbed obtain homogenizing, greatly improve the application life on road surface.
2 cement types and model
The label that cement selection meets national standard is portland cement or the Portland cement of 42.5, and require that the initial setting time is greater than 3h, final setting time is greater than 6h, to meet construction requirement.The architectural characteristic of ratio to material of cement and rubble has a great impact.In " bituminous pavement design for highway specification " (JTGD50-2006), regulation cement consumption should be 3% ~ 6%, and too much cement consumption easily causes basic unit to produce drying shrinkage and warm plastic forming, is that surface layer produces reflection crack then.By measuring 7 days unconfined water-saturated compression strength, consider the modulus of elasticity improving cement stabilized macadam base in the reasonable scope, the present invention selects cement consumption to be 4% ~ 4.5%.
3 water content
The formation of water content in cement stabilized macadam to material structure has very large effect, and the determination of optimum moisture content has very large impact for the uniformity of control structure, segregability and binder with the overall structure characteristic such as to connect between gathering materials.Cement Treated Material in the present invention obtains maximum water holding capacity according to compaction test.
The graded broken stone layer that basic unit of the present invention adopts is nonlinear, and its modulus of elasticity changes along with stress level.Because the rigidity of subbase is comparatively large, graded broken stone is easy to obtain higher compactness, and the subbase of higher stiffness is conducive to that graded broken stone is nonlinear to be given full play to simultaneously, reaches stress absorption, reduces the object of settlement of subgrade.
Superpave-12.5 belongs to flexbile base, ensures rich oil a little, can effectively suppress and reduce the generation of asphalt pavement reflective cracking.
Table, in, the asphalt content of cutting optimal must obtain by calculating, and ensure that it is asphalt optimum content.Surface course ensures that antiskid, wear-resisting, waterproof, closely knit, stability and durability are good.Middle surface layer ensures substantially waterproof, and high-temperature stability is good, closely knit.Cutting optimal ensures that high-temperature stability is good, closely knit, substantially waterproof, and anti-water damage ability is strong.Interlayer sprays glutinous layer oil, to connect between enhancement Layer.
As seen from the above technical solution, road structure of the present invention, has following feature: it is generally acknowledged, in differential settlement area, along with the increase of base course modulus, each deck stress in road surface all linearly increases.So base course modulus should be reduced in Pavement Structure Design, preferentially adopt flexbile base.But in the present invention, require that the modulus of elasticity of cement stabilized macadam base is comparatively large, to play the object of homogenizing differential settlement, and in the past conventional road structure is distinguished to some extent.
Claims (5)
1. the anti-fatigue asphalt pavement based on differential settlement, it is characterized in that comprising asphalt surface course, anti-fatigue layer, basic unit and subbase, described asphalt surface course comprises surface course, middle surface layer and cutting optimal, described surface level is in the upper surface of described flexible pavement, described middle topping laying is below described surface course, described cutting optimal is layed in below described middle surface layer, described surface course, glutinous layer oil is sprayed between intermediate layer and cutting optimal, described anti-fatigue layer is layed in below described cutting optimal, glutinous layer oil is sprayed between anti-fatigue layer and cutting optimal, described basic unit is layed in below described anti-fatigue layer, priming oil is sprayed between basic unit and anti-fatigue layer, described subbase is layed in below described basic unit, described subbase is layed on the roadbed on ground, described surface course adopts SMA-13 layer, described middle surface layer adopts Superpave-20 layer, described cutting optimal adopts Superpave-25 layer, described anti-fatigue layer adopts Superpave-12.5 layer, basic unit adopts graded broken stone layer, subbase adopts cement stabilized macadam layer, the maximum particle diameter of the rubble in described cement stabilized macadam layer is not more than 31.5mm, and adopt framework dense structure, cement adopt label be 42.5 portland cement or label be the Portland cement of 42.5, the initial setting time is required to be greater than 3h, final setting time is greater than 6h, cement consumption is 4% ~ 4.5%.
2., as claimed in claim 1 based on the anti-fatigue asphalt pavement of differential settlement, it is characterized in that the surface course of described asphalt surface course is the SMA-13 of 4cm, wherein SMA-13 is stone mastic asphalt, and nominal maximum aggregate size is 13mm, gap grading; The middle surface layer of described asphalt surface course adopts the Superpave-20 material of 6cm, and nominal maximum aggregate size is 20mm; The cutting optimal of described asphalt surface course is the Superpave-25 material of 8cm, and nominal maximum aggregate size is 25mm.
3. as claimed in claim 1 based on the anti-fatigue asphalt pavement of differential settlement, it is characterized in that the anti-fatigue layer between basic unit and surface layer, adopting the bituminous mixture of 4 ~ 6cm, is Superpave-12.5 material, nominal maximum aggregate size is 12.5mm, and control bitumen content is optimum content+0.2%.
4. as claimed in claim 1 based on the anti-fatigue asphalt pavement of differential settlement, it is characterized in that described basic unit adopts the graded broken stone that 20cm is thick, described subbase is the cement stabilized macadam that 20 ~ 30cm is thick, and wherein the modulus of elasticity of cement stabilized macadam controls between 1500MPa ~ 2000MPa.
5. as claimed in claim 1 based on the anti-fatigue asphalt pavement of differential settlement, it is characterized in that the macadam gradating of the cement stabilized macadam layer of described subbase is: the square hole screen being of a size of 31.5mm, rubble percent of pass is 100%, be of a size of the square hole screen of 19mm, rubble percent of pass is 80.7%, be of a size of the square hole screen of 9.5mm, rubble percent of pass is 52.6%, be of a size of the square hole screen of 4.75mm, rubble percent of pass is 30.2%, be of a size of the square hole screen of 2.36mm, rubble percent of pass is 19.6%, be of a size of the square hole screen of 0.6mm, rubble percent of pass is 11.4%, be of a size of the square hole screen of 0.075mm, rubble percent of pass is 2.8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139183.0A CN103215875B (en) | 2013-04-22 | 2013-04-22 | A kind of anti-fatigue asphalt pavement based on differential settlement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139183.0A CN103215875B (en) | 2013-04-22 | 2013-04-22 | A kind of anti-fatigue asphalt pavement based on differential settlement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103215875A CN103215875A (en) | 2013-07-24 |
| CN103215875B true CN103215875B (en) | 2015-09-16 |
Family
ID=48814000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310139183.0A Expired - Fee Related CN103215875B (en) | 2013-04-22 | 2013-04-22 | A kind of anti-fatigue asphalt pavement based on differential settlement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103215875B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343067B (en) * | 2013-08-01 | 2018-10-09 | 上海市政工程设计研究总院（集团）有限公司 | A kind of Heavy Traffic Long Life Asphalt Pavement |
| CN104499398A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure applicable to expansion deformation of black cotton soil subgrade |
| CN104499397B (en) * | 2014-12-12 | 2017-04-05 | 东南大学 | A kind of asphalt pavement structure based on coordination subgrade and pavement deformation |
| CN104762858B (en) * | 2015-03-16 | 2017-03-22 | 夏旻淑 | Asphalt concrete construction method for soft soil matrix pavement |
| CN106592370A (en) * | 2016-12-05 | 2017-04-26 | 扬州大学 | Drainability bituminous pavement |
| CN108829939B (en) * | 2018-05-24 | 2021-09-28 | 东南大学 | Theory and numerical simulation method for testing aggregate skeleton stability |
| CN112376349B (en) * | 2020-11-24 | 2022-04-08 | 东南大学 | Long-life flexible base asphalt pavement structure |
| CN113774749A (en) * | 2021-10-26 | 2021-12-10 | 中铁四局集团第一工程有限公司 | Pavement structure construction method of dynamic square of automobile test field |
| CN115506184A (en) * | 2022-08-19 | 2022-12-23 | 中交一公局集团有限公司 | Inverted combined structure based on cement stabilized macadam subbase and graded macadam base |
| CN115491943A (en) * | 2022-09-27 | 2022-12-20 | 河南省交通规划设计研究院股份有限公司 | Modular basic unit anti-reflection crack bituminous pavement structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280819A (en) * | 1927-06-16 | 1927-11-24 | Robert Henry King | A method of constructing hard roads from soft soil |
| JP2002294624A (en) * | 2001-04-03 | 2002-10-09 | Nippon Road Co Ltd:The | Water permeable pavement structure |
| CN102433815A (en) * | 2011-12-31 | 2012-05-02 | 山西省交通科学研究院 | Structure of asphalt pavement applicable to very heavy traffic |
| CN202865716U (en) * | 2012-08-07 | 2013-04-10 | 甘肃土木工程科学研究院 | Modified bituminous mixture pavement |
-
2013
- 2013-04-22 CN CN201310139183.0A patent/CN103215875B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280819A (en) * | 1927-06-16 | 1927-11-24 | Robert Henry King | A method of constructing hard roads from soft soil |
| JP2002294624A (en) * | 2001-04-03 | 2002-10-09 | Nippon Road Co Ltd:The | Water permeable pavement structure |
| CN102433815A (en) * | 2011-12-31 | 2012-05-02 | 山西省交通科学研究院 | Structure of asphalt pavement applicable to very heavy traffic |
| CN202865716U (en) * | 2012-08-07 | 2013-04-10 | 甘肃土木工程科学研究院 | Modified bituminous mixture pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103215875A (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103215875B (en) | A kind of anti-fatigue asphalt pavement based on differential settlement | |
| CN101092808A (en) | Stress absorption structured llayer of discontinuous ajar particle distribution limit mixture for asphaltum with high viscosity | |
| CN210262547U (en) | Wide structure is tied up to bituminous paving | |
| Hainin et al. | The importance of stone mastic asphalt in construction | |
| CN103628380A (en) | Low-dosage cement modified graded broken stone base pavement | |
| CN205171301U (en) | Bituminous pavement structure of big flexible basic unit of particle diameter water permeability bituminous mixture | |
| CN203514144U (en) | Asphalt concrete pavement structure for plateau area | |
| CN210712412U (en) | Asphalt pavement structure | |
| CN217324808U (en) | Long-life quiet road surface structure | |
| CN204174494U (en) | Novel flip-chip bituminous pavement structure | |
| CN208803318U (en) | A kind of hot-zone Airport Asphalt structure of heavy traffic summer | |
| CN204356652U (en) | A kind of waterproofing bridge floor paving structure | |
| CN108301276A (en) | A kind of long-life tencel concrete road surface structure and construction method | |
| CN104499397A (en) | Asphalt pavement structure based on coordination of deformation of subgrade and pavement | |
| CN204000529U (en) | Engineering asphalt pavement structure | |
| CN208917622U (en) | A kind of regenerative pervious pavement structure | |
| CN203440725U (en) | Asphalt layer covered composite pavement structure adopting porous modified cement concrete | |
| CN208250850U (en) | A kind of steel slag road paving structure | |
| CN215976685U (en) | Anti-crack pavement structure | |
| CN207672357U (en) | A kind of transition slab at bridge head and asphalt concrete pavement changeover portion composite pavement structure | |
| CN103321121B (en) | A kind of Perpetual Pavements Structural based on uniform settlement | |
| CN206070281U (en) | A kind of hard and soft combined base bituminous paving | |
| CN211256538U (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure | |
| CN113718580A (en) | Anti-crack pavement structure and construction method | |
| CN203668790U (en) | Modified graded broken stone base pavement structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20210422 |