CN106702846B - Asphalt pavement structure - Google Patents

Asphalt pavement structure Download PDF

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Publication number
CN106702846B
CN106702846B CN201710100117.0A CN201710100117A CN106702846B CN 106702846 B CN106702846 B CN 106702846B CN 201710100117 A CN201710100117 A CN 201710100117A CN 106702846 B CN106702846 B CN 106702846B
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China
Prior art keywords
layer
asphalt
pavement structure
thermal insulation
draining
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CN106702846A (en
Inventor
姜旺恒
韦潇树
王润丰
王征东
刘志恒
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/32Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/22Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224Surface drainage of streets
    • E01C11/225Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/32Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
    • E01C7/325Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses an asphalt pavement structure which comprises an asphalt surface layer, wherein the asphalt surface layer comprises a lower surface layer, a middle surface layer, a drainage heat-insulating layer and an upper surface layer which are sequentially arranged from bottom to top, and the drainage heat-insulating layer is an asphalt mixture layer with the void ratio of 8-20%. The asphalt pavement structure has the advantages of drainage function, temperature control function, reduction of water damage and rutting of the asphalt pavement and the like.

Description

Asphalt pavement structure
Technical field
The present invention relates to traffic engineering field more particularly to a kind of asphalt pavement structures.
Background technique
Bituminous pavement is exposed in natural environment, and the temperature and humidity in road surface changes with Environmental variations, drip The properties on green road surface are affected by Environmental variations.For a long time, highway in China generallys use three layers of closely knit drip Semi-rigid asphalt pavement of the green mixture as surface layer, as shown in Figure 1, generally using the upper surface of 40mm thickness layer, 50mm or Layer below the middle surface layer of 60mm thickness, 70mm or 80mm thickness.The ideal structure of thick grading asphalt is framework compact knot Structure but since coarse aggregate skeleton structure is by fine aggregate interference effect, coarse aggregate is often suspended between fine aggregate, as shown in Fig. 2, Or skeleton gap structure is formed due to lacking the gap between enough fine aggregate filling coarse aggregates;Therefore thick grading pitch Mixture is actually perhaps also easy to produce unstability generation flow deformation under shear stress caused by wheel load or cannot Rainwater is blocked outside road surface completely.
The actually asphalt surface course of making asphalt mixture gradation isolation, due to compacting is insufficient and crack extension etc., Bitumen layer is constantly present the region of infiltration.Water forms so-called " dynamic water after entering asphalt pavement structure under wheel load effect Pressure ", but recognize due to lacking to pore pressure within asphalt pavement action rule, there is not the asphalt road of science in the prior art Face inside configuration drainaging scheme.Chinese Patent Application No. discloses a kind of small particle macrovoid multilayer draining for 201610176684 Asphalt pavement structure, three layers of bituminous concrete for forming surface layer are drainage asphalt concrete, and construction cost is higher and penetrates into road The rainwater in face can penetrate into roadbed along base-layer contraction crack.Chinese Patent Application No. CN201610147804 discloses a kind of containing gradation The construction method of the dedusting draining macrovoid bituminous pavement of rubble composite layer is drained using superficial layer, the control of road pavement temperature Effect is limited.European countries use in road table making drainage asphalt concrete PAC(Porous Asphalt Concrete), It is Japanese then use and developed the open grade asphalt wear layer OGFC(Open Graded Friction originating from the U.S. Course), the voidage of the two all reaches 18% or more, all has preferable Pavement surface drainage and noise reduction effect, highway in China pitch Pavement Design specification (JTG D50-2006) and some pavement engineerings have used for reference this technology.However use this drainage pattern by It is constantly present local infiltration in drainage blanket bitumen layer below, pavement structure is inevitably influenced by pore water pressure, and The macrovoid of PAC, OGFC easily block, are difficult to borehole cleaning, and PAC, OGFC are needed using asphaltum with high viscosity, and asphalt content is larger, High construction cost, thus this kind of road surface in China using less.The country having for the serious problem of PAC pore plugging, Europe It reduces and uses PAC, or spend bigger cost making bilayer PAC to resist plug-hole.The asphalt pavement structure having in the prior art It is drained only with mushy asphalt as upper base course, such as open gradation Asphalt Stabilized Macadam ATPB (Asphalt Treated Porous Base) does not drain bitumen layer implementation as early as possible, can not prevent stagnant in asphalt surface course Water, because not every hole is connected with upper base in bitumen layer.
The temperature of each layer of semi-rigid asphalt pavement is often high to the softening point for being more than pitch, wheel lotus in high temperature season It carries repeat function and not only produces biggish rutting deformation in middle surface layer, the same rutting deformation of cutting optimal is larger.Existing asphalt road Thermal insulation layer or heat-reflective coating is arranged in face engineering temperature control measure Dou Shi road table, i.e. expensive thermoresistance layer directly bears wheel load Effect, with thermoresistance layer abrasion fail, under level lose thermal insulation protection, many sections do not have economic condition to build again Thermoresistance layer.Actively to reduce bituminous pavement temperature, track is reduced, has carried out low heat absorption road surface research, such as ceramic granule asphalt both at home and abroad Concrete road surface, ceramic asphalt concrete pavement, but this kind of low poor adhesion to gather materials in the presence of with pitch that absorbs heat, naturally broken The problems such as grain shape difference or relatively low crush values of gathering materials.Water conservation formula road surface has constant temperature effect due to being able to maintain certain moisture Fruit, but its water conservation time is shorter under the environmental condition of the open ventilation in road surface.The phase-change temperature control on road surface is then difficult to solve phase transformation material The coexistence problems of material and asphalt material, influence the performance of asphalt.At the same time, some engineerings are by building rigid base Bituminous pavement, composite pavement are to slow down track.Nevertheless, bituminous pavement active temperature control improves Pavement Condition technology still In the starting stage, the comprehensive performance of used thermal insulation layer asphalt is unsatisfactory, the easy abrasion loss of heat insulating coat, this The durability on road surface is all affected a bit.In addition, not all being designed accordingly for the climatic characteristic of each department in the prior art Asphalt pavement structure.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide one kind to can be reduced bituminous pavement vehicle Rut and Moisture Damage and the asphalt pavement structure for having both draining and temperature controlling function.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of asphalt pavement structure, including asphalt surface course, the asphalt surface course include below setting gradually from bottom to top Layer, middle surface layer, draining thermal insulation layer and upper layer, the draining thermal insulation layer are the asphalt layer of voidage 8%~20%.
As further improvement to above-mentioned technical proposal:
The upper layer and the cutting optimal are the asphalt layer that voidage is no more than 6%, the thickness of the upper layer Degree be T1, the cutting optimal with a thickness of T4, wherein 25mm < T1≤50mm, 50mm≤T4≤80mm.
It is described draining thermal insulation layer with a thickness of T2, wherein 30mm≤T2≤40mm.
The draining thermal insulation layer is the particulate formula asphalt layer of voidage 15%~20%, and the middle surface layer is voidage 8%~15% middle grain formula asphalt layer, the middle surface layer with a thickness of T3, wherein 50mm≤T3≤70mm.
Contain water-retaining material in the draining thermal insulation layer.
The water-retaining material is zeolite powder.
The asphalt pavement structure further includes the soil matrix below the asphalt surface course, the soil matrix and the bituminous sheaths Base is equipped between layer.
Upper base is equipped between the base and asphalt surface course, the upper base is open gradation Asphalt Stabilized Macadam ATPB Layer.
The draining thermal insulation layer two sides are equipped with ventilating layer, and the ventilating layer bottom is equipped with slope greening soil layer, the side Greening soil layer in slope is equipped with centralized pumping equipment.
The ventilating layer is designed as single particle size metalling or is equipped with draining ventilation duct, and the centralization pumping equipment is Arched framework slope protection or diamond shape skeleton slope protection.
The working principle of the invention is: one is being rung according to the pore pressure within asphalt pavement repeated under wheel load effect Rule is answered, drains road crust water leaking-in as early as possible, so that external water pressure caused by wheel load only causes hole in upper layer Gap water pressure;The second is reduce the temperature in asphalt surface course using the draining ventilation of thermal insulation layer, heat-blocking action, or delay heat to The conduction of asphalt surface course depths;The third is being mixed using draining thermal insulation layer middle skeleton type asphalt compared to suspension compact type asphalt Expect better Rut resistance deformability, reduces the track of entire bitumen layer.
Compared with prior art, asphalt pavement structure of the invention has both the function of draining and temperature control, and specific advantage is as follows:
1, asphalt pavement structure of the invention, the setting draining thermal insulation layer between the upper surface of asphalt surface course layer and middle surface layer, Drainage asphalt concrete PAC or open grade asphalt wear layer OGFC is set compared in road table, both in asphalt surface course by external water The maximum layer position draining abatement pore water pressure of pressure influence, and solve the problems, such as that Pavement surface drainage thermal insulation layer hole is susceptible to plugging; It is drained compared to only setting sub-surface, asphalt pavement structure of the invention can be realized to be drained as early as possible, reduces asphalt surface course infiltration. The asphalt of the voidage 8%~20% used, can active temperature control for mushy asphalt.
2, asphalt pavement structure of the invention can be reduced using gravity-flow ventilation, draining or the water retaining function of draining thermal insulation layer Temperature in asphalt surface course, and the temperature heat of asphalt surface course is delayed to conduct to asphalt surface course depths, increase the viscous of asphalt mastic Degree, to enhance the anti-water damage of asphalt surface course, temperature control also helps reduction track.Due to the pitch mixing of draining thermal insulation layer Material is framework type asphalt mixture, has better Rut resistance deformability compared to middle surface layer suspension compact type asphalt mixture, Be conducive to reduce the track of entire asphalt surface course, this also just reduces ponding at track.
3, the middle surface layer designed the characteristics of the same period hot in view of many area rain also functions as draining thermal insulation layer, i.e., using double Layer draining, such road surface internal pore is more, is conducive to gravity-flow ventilation heat dissipation, heat is prevented to conduct downwards, the water for penetrating into road surface exists The Seepage flow time drained in thermal insulation layer is longer, and the heat taken away is more;Drain the particulate formula that thermal insulation layer is voidage 15%~20% Asphalt, middle surface layer be voidage 8%~15% middle grain formula asphalt, draining thermal insulation layer than middle surface layer partial size more Small, the aperture of the hole of formation is smaller, blocking draining thermal insulation layer when can be better protected from making or overhaul upper layer.Draining every Thermosphere and the thickness of middle surface layer are bigger, and the ability for spreading load is also bigger, and wheel load is transmitted to following through draining thermal insulation layer The load of layer is smaller, more effective to the track of control cutting optimal.
4, asphalt pavement structure of the invention is higher than 15 DEG C of area for average temperature of the whole year, drains and contains in thermal insulation layer Water-retaining material, temperature control ability is stronger, and water-retaining material is not filled with the gap in draining thermal insulation layer, is avoided that wheel load Effect is lower to generate pore water pressure.
Detailed description of the invention
Fig. 1 is three-layer type asphalt surface course conventional in the prior art.
Fig. 2 is the force stability schematic diagram of conventional three-layer type asphalt surface course in the prior art.
Fig. 3 is the boundary condition schematic diagram of test result in the present embodiment 1 of the present invention.
Fig. 4 is the external water pressure schematic diagram of asphalt test piece in test in the present embodiment 1 of the present invention.
Fig. 5 is that the interstitial hydraulic pressure of different depths is illustrated in asphalt test piece when 0~0.4s in test in the embodiment of the present invention 1 Figure.
Fig. 6 is that the interstitial hydraulic pressure of different depths shows in asphalt test piece when 0.4~0.7s in test in the embodiment of the present invention 1 It is intended to.
Fig. 7 is that the interstitial hydraulic pressure of different depths shows in asphalt test piece when 0.8~1.1s in test in the embodiment of the present invention 1 It is intended to.
Fig. 8 is that the interstitial hydraulic pressure of different depths shows in asphalt test piece when 1.2~1.5s in test in the embodiment of the present invention 1 It is intended to.
Fig. 9 is the asphalt surface course of the embodiment of the present invention 1.
Figure 10 is the force stability schematic diagram of the asphalt surface course of the embodiment of the present invention 1.
Figure 11 is the asphalt pavement structure schematic diagram of the embodiment of the present invention 1.
Marginal data:
1, soil matrix;2, base;3, asphalt surface course;31, cutting optimal;32, middle surface layer;33, thermal insulation layer is drained;34, upper layer; 341, runway upper layer;342, hardened verge upper layer;4, slope greening soil layer;5, ventilating layer;6, hardened verge coagulating cement Soil layer.
Specific embodiment
The present invention is further elaborated below with reference to Figure of description and specific embodiment.
Embodiment 1
Asphalt pavement structure in the present embodiment is suitable for 10 DEG C of average temperature of the whole year or less areas.
As shown in Figs. 9 to 11, a kind of asphalt pavement structure of the present embodiment, including asphalt surface course 3, asphalt surface course 3 include Layer 31, middle surface layer 32, draining thermal insulation layer 33 and upper layer 34 below setting gradually from bottom to top, draining thermal insulation layer 33 are gap The asphalt layer of rate 8%~20%.The asphalt pavement structure of the present embodiment has both draining and temperature controlling function, in asphalt surface course 3 The upper surface of between layer 34 and middle surface layer 32 setting draining thermal insulation layer 33, compared to road table be arranged drainage asphalt concrete PAC or Open grade asphalt wear layer OGFC, both in asphalt surface course 3 by the maximum layer position draining abatement pore water pressure of external water pressure influence Power, and solve the problems, such as that 33 hole of Pavement surface drainage thermal insulation layer is susceptible to plugging;It is drained compared to only setting sub-surface, drip of the invention Green pavement structure can be realized to be drained as early as possible, reduces the infiltration of asphalt surface course 3.The asphalt of the voidage 8%~20% of use It, can active temperature control for mushy asphalt.It, can using gravity-flow ventilation, draining or the water retaining function of draining thermal insulation layer 33 The temperature in asphalt surface course 3 is reduced, and the temperature heat of asphalt surface course 3 is delayed to conduct to 3 depths of asphalt surface course, increases asphalt adhesive The viscosity of slurry, to enhance the anti-water damage of asphalt surface course 3, temperature control also helps reduction track.Due to draining thermal insulation layer 33 Asphalt be framework type asphalt mixture, there is better anti-vehicle compared to middle 32 suspension compact type asphalt mixture of surface layer Rut deformability is conducive to the track for reducing entire asphalt surface course 3, this also just reduces ponding at track.
Upper layer 34 be voidage be no more than 6% asphalt layer, upper layer 34 with a thickness of T1, cutting optimal 31 is set It is calculated as the asphalt layer that voidage is no more than 6%, 0mm < T1≤50mm.Wearing course of the upper layer 34 as road surface uses Closely knit asphalt, protection draining 33 hole of thermal insulation layer are fluid-tight asphalt from blocking, cutting optimal 31, are prevented Rainwater infiltration protects soil matrix 1 and base 2.The thickness T4 value range of cutting optimal 31 is 50mm~80mm.
Drain thermal insulation layer 33 with a thickness of T2, wherein 30mm≤T2≤40mm.The thickness T3 value range of middle surface layer 32 is 30mm~60mm.
After the occurrence for selecting T1, T2, T3, T4 within the above range, by highway in China asphalt pavement design criterion method Determine the thickness of remaining each layer of asphalt pavement structure.In the present embodiment, T1=40mm, T2=30mm, T3=50mm, T4=70mm.
Fig. 9 is the asphalt surface course 3 of the present embodiment, and draining thermal insulation layer 33 is multi-void asphalt mixture, due to fine aggregate ratio Seldom, coarse aggregate skeleton structure is formed preferable example, and as shown in Figure 10, diffusion weight bearing power is relatively more preferable.Therefore, the present embodiment In asphalt surface course 3 it is more preferable compared to the conventional three-layer type asphalt surface course rutting resistance of the prior art in Fig. 1.
The loose asphalt mixture to be paved for the multi-pore structure of guarded drainage thermal insulation layer 33 by upper layer 34 blocks, draining every The maximum particle diameter of the asphalt of thermosphere 33 is restricted, maximum particle diameter 16mm.
It drains 33 two sides of thermal insulation layer and is equipped with ventilating layer 5,5 bottom of ventilating layer is equipped with slope greening soil layer 4, and slope greening is used Soil layer 4 is equipped with centralized pumping equipment.
The asphalt pavement structure of the present embodiment further includes the soil matrix 1 positioned at 3 lower section of asphalt surface course, soil matrix and asphalt surface course 3 Between be equipped with base 2, the two sides of soil matrix 1 and base 2 are equipped with slope greening soil layer 4, cutting optimal 31, middle surface layer 32 and draining every The two sides of thermosphere 33 are equipped with ventilating layer 5, and the two sides of upper layer 34 are equipped with hardened verge cement concrete layer 6.Wherein, ventilating layer 5 is Single particle size metalling or draining ventilation duct.
In the present embodiment, ventilating layer 5 is designed as single particle size metalling or is equipped with draining ventilation duct, and centralization draining is set It applies as arched framework slope protection, in other embodiments, ventilating layer 5 is equipped with draining ventilation duct, and centralized pumping equipment is or water chestnut Shape skeleton slope protection.
The sequencing of asphalt pavement structure making is successively in the present embodiment: soil matrix 1, base 2, cutting optimal 31, middle face It is layer 32, draining thermal insulation layer 33, runway upper layer 341, slope greening soil layer 4, ventilating layer 5, hardened verge upper layer 342, hard Road shoulder cement concrete layer 6, after the completion of each part mentioned above making, in slope greening with building centralized pumping equipment on soil layer 4, Ensure that rainwater may not flow into ventilating layer 5.
In making slope greening soil layer 4, pay attention to carrying out the outer surface of cutting optimal 31, middle surface layer 32 and upper layer 34 Covering.After slope greening soil layer 4 has been spread, to its top surface using light-duty road roller roll it is smooth.
In the present embodiment, 5 surface of ventilating layer is covered with anti-blocking when slope greening is toppled over soil layer 4 in work progress Hole.
In the present embodiment, the rutting deformation of three-layer type asphalt surface course 3 is primarily generated at middle surface layer 32 on semi-rigid type base 2, It is not only because existing temperature gradient between each layer, also as the stress water that each layer in road surface is caused under Vehicle Load Flat difference.The stress level of each layer in road surface is not only related with the depth of each layer, also related with the load diffusivity of each layer.It will control Temperature combines with the load diffusivity of enhancing asphalt surface course 3, then the track of bituminous pavement will greatly reduce.
Three-layer type asphalt surface course as shown in Figure 1 is taken to be fabricated to asphalt test piece, by water attack theoretical method to external water pressure It acts on lower bituminous pavement pore water and carries out force analysis, list the equation of motion and continuity equation, establish pore water pressure fluctuation Equation.With test result (the i.e. pitch coagulation of side wall sealing of application for a patent for invention CN201610022605X Figure of description 10 Pore water pressure real-time response of the native test specimen under the moment external water pressure power effect being repeated cyclically) as boundary condition, such as Shown in Fig. 3, pore water pressure wave equation is solved, is obtained under external water pressure power effect shown in Fig. 4, it is different deep in asphalt test piece The pore water pressure being under different time is spent as shown in Fig. 5~Fig. 8.
In external water pressure peak value or thereafter in 0.1s in asphalt test piece hole without negative pressure, and in asphalt test piece near top Cause maximum pore water pressure, or causes maximum pore water pressure with middle and lower part at the top of asphalt test piece;And in external water pressure When being offloaded to zero, occurs negative pore water pressure in asphalt test piece.In addition, any moment asphalt test piece depth always has in this way Adjacent two o'clock, pore water pressure difference remains at 0.2MPa or so, and pressure is bigger at next point, and performance is positive sometimes The pore pressure of negative alternation.The position that pressure difference occurs is first mobile from test specimen bottom to top, then reversely mobile to bottom, with external water Pressure repeat function and recycle according to this.The two o'clock for pressure difference occur normally behaves as two apparent pressure inflection points, and two inflection points At a distance of the very little compared with test specimen height.It moves from bottom to top, then it is unfavorable to the protrusion on hole wall, such as on asphalt mastic surface Grain object can be removed by it;It moves from top to bottom, then it is unfavorable to the adherency of asphalt membrane, after first being compressed because of the intrapore air that gathers materials Expansion.Most of all, pore water pressure difference experienced is maximum at nearly asphalt test piece top along asphalt test piece depth direction. Therefore, the asphalt pavement structure of the present embodiment, the setting draining thermal insulation layer 33 at the top of nearly top course, both can be to avoid at this There is very big pore water pressure pressure drop, and the water of infiltration can be discharged as early as possible.
Embodiment 2
The asphalt pavement structure of the present embodiment is suitable for 10 DEG C~15 DEG C of average temperature of the whole year of area.
In the present embodiment, asphalt pavement structure is roughly the same with embodiment 1, the difference is that: middle surface layer 32 also functions as Thermal insulation layer 33 is drained, draining the particulate formula asphalt layer that thermal insulation layer 33 is voidage 15%~20%, (the present embodiment is to open grade With asphalt wearing layer OGFC-13), middle surface layer 32 be voidage 8%~15% middle grain formula asphalt layer (the present embodiment be open Gradation asphalt wearing layer OGFC-16), middle surface layer 32 with a thickness of T3, wherein 50mm≤T3≤70mm.
After the occurrence for selecting T1, T2, T3, T4 within the above range, by highway in China asphalt pavement design criterion method Determine the thickness of remaining each layer of asphalt pavement structure.In the present embodiment, T1=40mm, T2=30mm, T3=50mm.
In the present embodiment, using double-layer drainage, road surface internal pore is more, be conducive to gravity-flow ventilation heat dissipation, prevent heat to Lower conduction.Seepage flow time of the water on infiltration road surface in draining thermal insulation layer 33 is longer, and the heat taken away is more, this is allowed for perhaps The characteristics of more area rain hot same period and design.It is smaller than the partial size of middle surface layer 32 to drain thermal insulation layer 33, the hole of the hole of formation Diameter is smaller, blocking draining thermal insulation layer 33 when can be better protected from making or overhaul upper layer 32.Drain thermal insulation layer 33 and middle face 32 thickness of layer are bigger, and the ability for spreading load is bigger, and wheel load is transmitted to following through draining thermal insulation layer 33 and middle surface layer 32 The load of layer 31 is smaller, more effective to the track of control cutting optimal 31.In other embodiments, middle surface layer 32 can be used bigger Partial size, it is often more important that the hole of entire draining thermal insulation layer 33 is more, and equal temperature technique of circulation effect is more preferable.
Embodiment 3
Asphalt pavement structure in the present embodiment suitable for 15 DEG C of temperature on average or more area and gravity-flow ventilation with The limited area of the cooling effect of draining.
The present embodiment asphalt pavement structure is roughly the same with embodiment 2, the difference is that: contain in draining thermal insulation layer 33 Water-retaining material pours into water-retaining material after the completion of draining 33 making of thermal insulation layer.
It drains thermal insulation layer 33 and carries out part water conservation to improve cooling effect, make to drain 33 part hole of thermal insulation layer by water-retaining property Material filling, temperature control ability is stronger, acts in lower draining thermal insulation layer 33 to prevent wheel load and forms pore water pressure, can be into one Step actively controls wet, to facilitate the pore water pressure for reducing asphalt surface course 3 and reduce miberal powder loss of washing away, and then keeps asphalt adhesive The viscosity of slurry and the high-temperature stability for keeping asphalt, can be further reduced Moisture Damage and track, improve bituminous pavement Service performance.
Water-retaining material in the present embodiment is zeolite powder.
Embodiment 4
The asphalt pavement structure of the present embodiment is roughly the same with embodiment 1, the difference is that: base 2 and asphalt surface course 3 Between be equipped with ATPB layers of open gradation Asphalt Stabilized Macadam, as the upper base (thickness one that ATPB layers of open gradation Asphalt Stabilized Macadam As be 80mm~120mm, in the present embodiment, with a thickness of 90mm).
ATPB is permeable asphalt, can guarded drainage thermal insulation layer 33 it is lower below the infiltration of layer 31, draining, prevent rainwater Lower infiltration, to protect base not to be washed.
Embodiment 5
The asphalt pavement structure of the present embodiment is roughly the same with embodiment 2, the difference is that: base 2 and asphalt surface course 3 Between be equipped with ATPB layers of open gradation Asphalt Stabilized Macadam, as upper base.
Embodiment 6
The asphalt pavement structure of the present embodiment is roughly the same with embodiment 3, the difference is that: base 2 and asphalt surface course 3 Between be equipped with ATPB layers of open gradation Asphalt Stabilized Macadam, as upper base.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment, Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.

Claims (8)

1. a kind of asphalt pavement structure, including asphalt surface course (3), which is characterized in that the asphalt surface course (3) includes from bottom to top Layer (31), middle surface layer (32), draining thermal insulation layer (33) and upper layer (34), the draining thermal insulation layer (33) below setting gradually For the asphalt layer of voidage 8%~20%;
The upper layer (34) and the cutting optimal (31) are the asphalt layer that voidage is no more than 6%, the upper layer (34) with a thickness of T1, the cutting optimal (31) with a thickness of T4, wherein 25mm < T1≤50mm, 50mm≤T4≤80mm;
It is described draining thermal insulation layer (33) with a thickness of T2, wherein 30mm≤T2≤40mm.
2. asphalt pavement structure according to claim 1, which is characterized in that the draining thermal insulation layer (33) is voidage 15%~20% particulate formula asphalt layer, the middle surface layer (32) are the middle grain formula asphalt of voidage 8%~15% Layer, the middle surface layer (32) with a thickness of T3, wherein 50mm≤T3≤70mm.
3. asphalt pavement structure according to claim 2, which is characterized in that contain water conservation in the draining thermal insulation layer (33) Property material.
4. asphalt pavement structure according to claim 3, which is characterized in that the water-retaining material is zeolite powder.
5. asphalt pavement structure according to any one of claim 1 to 3, which is characterized in that the asphalt pavement structure Further include the soil matrix (1) below the asphalt surface course (3), base is equipped between the soil matrix (1) and the asphalt surface course (3) Layer (2).
6. asphalt pavement structure according to claim 5, which is characterized in that between the base (2) and asphalt surface course (3) Equipped with upper base, the upper base is ATPB layers of open gradation Asphalt Stabilized Macadam.
7. asphalt pavement structure according to claim 5, which is characterized in that the draining thermal insulation layer (33) two sides are equipped with ventilating layer (5), ventilating layer (5) bottom is equipped with slope greening with soil layer (4), and the slope greening is equipped with centralization row with soil layer (4) Drainage facility.
8. asphalt pavement structure according to claim 7, which is characterized in that the ventilating layer (5) is designed as single particle size Metalling is equipped with draining ventilation duct, and the centralization pumping equipment is arched framework slope protection or diamond shape skeleton slope protection.
CN201710100117.0A 2017-02-23 2017-02-23 Asphalt pavement structure Expired - Fee Related CN106702846B (en)

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