CN103114510B - Bituminous pavement provided with lattice structure transition compound layer and construction method thereof - Google Patents
Bituminous pavement provided with lattice structure transition compound layer and construction method thereof Download PDFInfo
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- CN103114510B CN103114510B CN201310047328.4A CN201310047328A CN103114510B CN 103114510 B CN103114510 B CN 103114510B CN 201310047328 A CN201310047328 A CN 201310047328A CN 103114510 B CN103114510 B CN 103114510B
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Abstract
The invention relates to a bituminous pavement provided with a lattice structure transition compound layer. The lattice structure transition compound layer is arranged between a semi-rigid base layer (7) and a bituminous concrete surface layer (4) of the bituminous pavement; and the lattice structure transition compound layer comprises a rubber bituminous stress absorption layer (5) and a lattice sandwich coil which is tightly adhered above the rubber bituminous stress absorption layer. The lattice sandwich coil sequentially comprises a piece of geotextile (1) for covering petroleum bitumen, columnar rubber grains (2) and a piece of geotextile (3) covering with rubber bitumen. According to the bituminous pavement disclosed by the invention, the current problems of stacking a plurality of wasted tires and pollutants are solved according to the reduction of the bituminous pavement or the delaying of the generation of reflection cracks, and the environmental friendliness and the resource recycling are integrated. The bituminous pavement can be used for the technical field of road engineering.
Description
Technical field
The present invention relates to have flexible pavement and the construction method thereof of lattice structure transition composite bed, to asphalt concrete pavement, belong to the technical field of highway construction for the crack deflection that prevents semi-rigid type base.
Background technology
Semi-rigid type base is because strength and stiffness is large, water stability is good, the advantages such as convenience of drawing materials are nearby used widely in the design of flexible pavement basic unit of China, but the internal factors such as the contraction of semi-rigid sub-base material self, strength deficiency and uneven settlement of foundation cause semi-rigid type base inevitably to produce crack, but semi-rigid type base non-deformability is poor, more responsive to temperature and humidity variation, thereby be easy to produce cup shake and warm draw seam.Once after semi-rigid type base cracking, under road traffic load stress and temperature changing stress repeated action, the junction of asphalt surface course and semi-rigid type base interlayer produces stress and concentrates, crack is upwards expansion gradually, cause flexible pavement to occur reflection crack, under environmental factor and action of traffic loading, accelerate flexible pavement and destroy, have a strong impact on the normal service life on road surface.
Be difficult to avoid because semi-rigid sub-base material characteristic causes base course crack, basic crack reflection causes asphalt roads usually just to there will be crack on the road surface, 1 year left and right that is open to traffic.The appearance in crack can make asphalt concrete pavement lose globality, road surface bulk strength obviously reduces, roughness descent, under the effect of rainwater via naturally osmotic and wheel, enter base course by reflection crack very soon, and accumulate in substrate surface, thereby cause that basic unit's roadbed is softening, cause road surface supporting capacity to decline, produce inside and wash away and road surface deposition phenomenon.Along with the width in crack constantly increases, crack quantity increasing year by year, has more aggravated the destruction on road surface, has shortened the application life of flexible pavement.The ratio that causes the reflection crack of asphalt surface course cracking to account for pavement crack due to semi-rigid type base cracking has exceeded 50%.Therefore, stop the crack of base course crack to be upwards passed to focus and the difficult point that asphalt surface course is current road technical research.
The Chinese patent application 200710019042.X that patent name is " asphalt macadam stress absorption layer and construction method thereof " discloses a kind of composite bed that can absorb and subdue inter-laminar stress, be arranged on the junction of semi-rigid type base and asphalt surface course, weaken the shrinkage crack of semi-rigid type base and reflection crack to asphalt surface course transmission, it is made up of macadam, stress absorption tack coat and articulamentum.
The Chinese patent application 201120126604.2 that patent name is " a kind of glass fiber grating composite geotextile " discloses a kind of plane net trellis structure, can suppress plate and shrink the pavement crack that the reflection crack that causes or gene basis crack deflection cause, the base material that described structure is woven into by alkali-free glass fibre and the geotextiles bonding being coated in outside bitumen layer and the bitumen layer on base material form.
The Chinese patent application 2011200219222.2 that patent name is " bituminous concrete pavement composite sandwich that a kind of delayed reflex crack is upwards developed " discloses a kind of cracking resistance paste layer that is provided with glass high polymer between surface layer and surface layer or surface layer and basic unit, and cracking resistance paste layer is from top to bottom composited by glass fabric layer, high polymer layer, tire base, high polymer layer successively.
Reduce asphalt surface course in some countries of the U.S., Australia and South Africa using graded broken stone layer as crack separation layer and occur reflection crack, obtained good effect.The reason that graded broken stone separation layer could prevent and slow down reflection crack mainly contains: 1, graded broken stone is bulk solid, and shrinkage factor is minimum; 2, graded broken stone material has the characteristic of the tensile stress do not transmitted, stretching strain as shot structure.But graded broken stone also exists some shortcomings simultaneously, its anti-shearing, bending resistance draw with anti-fatigue performance a little a little less than, how to give full play to the advantage of graded broken stone, scientifically design and use rubble transition zone, allowing graded broken stone and semi-rigid type base jointly play a role to embody its mechanical property, is the problem that needs emphasis to solve separation layer is set.
1974, U.S.'s Dakota making nonwoven polypropylene geotextile, as test section, used through the observations of 3 years, finds that this geotextile can not only reduce reflection crack, can also prevent that sleet from oozing under water.1999 Hong Kong road, Qingdaos overlay when transformation on a certain section making polyester non-woven geotextile, be open to traffic 1 year afterwards contrast find, adopt the section of geotextiles not occur crack, do not have the section of making geotextiles to occur reflection crack.More domestic universities and colleges prevent that to geotextiles the effect of reflective crack from also having carried out comparatively careful research, and result shows to add the normal stress at asphalt surface course crack tip place after geotextiles obviously to reduce, and the disease of reflective crack has alleviating by a relatively large margin.
Want to reduce and prevent the generation of asphalt pavement reflective cracking phenomenon, must manage to reduce the Asphalt Concrete Overlay intensity that crack tensile stress upwards transmits of going to a grassroots level.Thisly between surface layer and basic unit, lay that one deck modulus of elasticity is low, the material of good toughness is as the method for stress absorbing layer, the main material of use has geotextile or geo-grid, stress absorption film, modified asphalt waterproof felt etc. conventionally.
Although they are applied in engineering practice, self also all exists some defects.The contact area of this material of for example geo-grid and levels is limited, is difficult to effectively bring into play the effect of interlaminar bonding, does not also have the effect of waterproof.Geotextiles due to thinner thickness and with the bad adhesion of semi-rigid type base or old cement concrete, therefore result of use has limitation.Modified asphalt waterproof malthoid is generally by cold bonding method and hot melt and semi-rigid type base bonding, and wherein cold bonding method is unfavorable for combining closely of interlayer; Hot melt require the nozzle of fired heater and the distance of coiled material suitable, temperature control is improper, can affect adhesive strength and the sealing performance of coiled material seam, and over-heating meeting makes the aging zoom of modified bitumen, has increased difficulty of construction.
The present invention is for avoiding the existing deficiency of above-mentioned prior art, design the transition to road surface as basic unit of a kind of truss core structure, this lattice structure can bond with semi-rigid type base and rubber asphalt stress absorbing layer, avoid basic unit directly to contact with surface layer, can absorption portion tensile energy, effectively improve the distribution of road structure stress, alleviate the stress concentration phenomenon at crack place, and water resistance has been good.
Summary of the invention
The present invention is directed to semi-rigid asphalt pavement and easily occur this disease phenomenon of reflective crack, propose making rubber grain lattice structure pavement transition composite bed between semi-rigid type base and asphalt surface course, formed by rubber asphalt stress absorbing layer and truss core coiled material successively from bottom to top.Wherein the specific constructive form of truss core coiled material is rubber grain and the upper and lower two-layer geotextile close contact that size is identical, and periodic arrangement form is cemented between two-layer geotextile according to certain rules, and the surface of that layer of geotextile contacting with semi-rigid type base wraps with rubber asphalt dipping, the geotextile dipping last layer petroleum bitumen contacting with asphalt concrete pavement.Rubber asphalt stress absorbing layer is that building stones are layered on the rubber asphalt binding material having sprayed equably, then building stones is rolled with pneumatic-tired rollers, forms the structural sealing of building stones interlocking.
The present invention's lattice material rubber grain used is to adopt junked tire to process, and rubber grain is elastic material, and intensity is high, bears deformability strong.Junked tire has become a serious environmental issue and social concern, country's processing that spends huge sums every year, and therefore the present invention has important low-carbon environment-friendly meaning.
Lattice material is in recent years along with constantly progressive development and the class novelty occurring, the multifunctional material form of lightweight of the preparation of Aeronautics and Astronautics large-scale component structure and machine-shaping technology, there are some good mechanical performances such as ultralight, high porosity, high-strength tenacity, high specific strength, high specific stiffness, high-energy absorption, having function and structure double action concurrently, is a kind of multifunctional engineering material of excellent performance.Three-dimensional rubber asphalt basic point array composite material structure belongs to truss core structure.Due to the special microstructure of lattice material, make a part of shear-type load be converted into the compressive load of space truss, greatly improve the anti-shear ability of material.
The rubber grain that this size is identical is regularly arranged in three dimensions, and with upper and lower two layers polyester nonwoven acupuncture geotextiles combine closely form array format be called space lattice.Because lattice structure itself possesses the advantage of high-strength light, high porosity, high-energy absorption, make to utilize the truss core coiled material of rubber grain and geotextile composition to have the double action of anti-cracking structure and antiseepage function concurrently.
Truss core coiled material can play good stress absorption effect and reinforcement buffer action in transition zone, also there is waterproof and heat insulation effect simultaneously, thereby can effectively reduce the appearance of surface layer reflective crack, stop the infiltration of surface layer current direction basic unit, and can optimize asphalt surface course design thickness, reduce asphalt concrete material cost, greatly reduce maintenance, the maintenance costs in road later stage simultaneously.On the other hand, rubber asphalt stress absorbing layer is set on semi-rigid type base, being equivalent to cover a layer thickness in basic unit is the asphalt membrane of 1cm left and right, can effectively prevent that moisture from infiltrating basic unit and roadbed, played reliable protective effect.
Rubber asphalt stress absorbing layer is bonded together truss core coiled material and semi-rigid type base effectively securely, is conducive to structural entity stressed.And rubber asphalt stress absorbing layer itself just has the function that prevents reflection crack, can stop preferably the crack that basic unit produces to continue upwards to transmit, there is the effect of Seal & isolation concentrated stress.The geotextile dipping last layer petroleum bitumen that the sandwich coiled material of dot matrix contacts with asphalt concrete pavement, is conducive to geotextile and pitch viscous oil layer is fused into an entirety, thereby strengthens the caking property of coiled material and asphalt surface course.
The object of the invention is to realize through but not limited to following technical scheme.
On the one hand, according to the flexible pavement with lattice structure transition composite bed of the present invention, lattice structure transition composite bed is arranged between the semi-rigid type base and asphalt concrete pavement of flexible pavement, and lattice structure transition composite bed comprises rubber asphalt stress absorbing layer and is close to the truss core coiled material of rubber asphalt stress absorbing layer top.
Preferably, truss core coiled material is divided into three layers, be followed successively by from top to bottom geotextile, the cylinder rubber grain that wraps petroleum bitumen and the geotextile that wraps rubber asphalt, wherein cylinder rubber grain be arranged in the form of dot matrix between the geotextile that wraps the geotextile of petroleum bitumen and wrap rubber asphalt and with its close contact.
Between truss core coiled material, can connect with T shape jointing apparatus, and cementing with heated bitumen or mulseal in junction, with suture, the upper layer of T shape jointing apparatus and two blocks of truss core coiled materials is sewed up again, made two blocks of truss core coiled materials firmly be coupled to an entirety.
More preferably, rubber asphalt stress absorbing layer is to adopt the stress absorbing layer of rubber asphalt as cementitious matter, and in rubber asphalt, spread wraps the rubble of pitch in advance.The geotextile that wraps petroleum bitumen can be polyester acupuncture nonwoven geotextiles with the geotextile that wraps rubber asphalt.
More preferably, the geotextile that wraps petroleum bitumen is 1.5～2.5mm with the thickness of the geotextile that wraps rubber asphalt, and the height of cylinder rubber grain is 2～8mm, and the thickness of rubber asphalt stress absorbing layer is 10～12mm.
On the other hand, there is the construction method of the flexible pavement of lattice structure transition composite bed according to the present invention, it is characterized in that carrying out according to following steps: step 1, the truss core coiled material that is prefabricated in the factory, is transported to road construction scene; Step 2, uses rubber asphalt premixed macadam, makes rubble surface wrap in advance rubber asphalt; Step 3, dust, discrete particles and foreign material on cleaning semi-rigid type base, the planeness of assurance semi-rigid type base, repairs the defect of substrate surface, and makes it fully dry; Step 4 is sprayed rubber asphalt on the semi-rigid type base of handling well; Step 5, spreading rubble on the rubber asphalt having sprayed, requires spreading even and appropriate; Step 6, rolls the road surface after spreading rubble, to form the fixed complete structure body of building stones and rubber asphalt interlocking; Step 7, after the compacting of rubber asphalt stress absorbing layer, the rubber asphalt stress absorbing layer surface spreading pitch sticking layer oil of cleaning out; Step 8 was laid in truss core coiled material on the rubber asphalt stress absorbing layer that has sprayed pitch sticking layer oil before viscous oil layer viscosity loses; Step 9, the T shape jointing apparatus that polyester nonwoven acupuncture geotextiles is made assigns into the stitching portion of two blocks of truss core coiled materials, uses special suturing with thread management, makes to be firmly coupled between adjacent coiled material an entirety; Step 10 is sprayed the pitch sticking layer oil of same kind on the truss core coiled material of laying and having overlapped; Step 11, after viscous oil layer is cooling, fills bituminous concrete in time, and guarantees the degree of compaction of asphalt concrete pavement.
Preferably, the rubber grain that forms truss core coiled material mid portion in step 1 is by becoming waste and used rubber tyre crushing grinding compressing through mould after rubber powder; In step 2, the weight ratio of rubber asphalt and rubble is 0.40～0.60%, and while wrapping, the temperature of pitch is more than 120 ℃; The spread temperature of step 4 medium pitch is controlled at 190 ℃～200 ℃, and the consumption of rubber asphalt is 2～3kg/m
2; The pitch sticking layer oil using in step 7 and step 10 is the pitch sticking layer oil through EVA or SBS modification, and each oil mass of spraying is 0.4～0.6kg/m
2, oil temperature remains between 150～170 ℃; In step 9 for sew up the line of T shape device and truss core coiled material must possess with polyester nonwoven knitted geotextile quite or exceed the ability of its resist chemical, and be the material of antiultraviolet.
According to the present invention, between semi-rigid type base and asphalt concrete pavement, introduce the support frame of truss core structure as pavement transition composite bed, make transition zone there is good pliability, caking property and waterproof effect, play the effect that absorbs stress, while rubber grain is closely arranged in an orderly manner grid configuration and makes whole coiled material under load action, have good stability and supporting capacity, and the distribution form that presents periodic arrangement between this node easily realizes mechanization production, construction technology is relatively simple.
The beneficial effect that the present invention compared with prior art reaches is:
1, rubber grain junked tire being made into is applied in the pavement transition layer of truss core structure, fully demonstrate the theory of " turning waste into wealth ", reclaim and utilize junked tire not only to solve accumulation and the pollution problem of abandoning in a large number tire at present, also the development of rubber processing industry is played to positive induced effect, integrated environmental protection and resource regeneration.Meanwhile, rubber asphalt stress absorbing layer also uses waste-tyre rubber-powder, has increased the consumption of waste resource.No matter be to consider from economic benefit or environmental protection, a kind of desirable Design Mode of all can yet be regarded as.And junked tire is ground to form in the production link of ground rubber without desulfurization, manufacture craft is uncomplicated, expends the energy less, and rubber powder still has fine physical and mechanical properties making after rubber grain.
2, the pavement transition composite bed of dot matrix sandwich structure is set between basic unit and surface layer, not only can brings into play the cementation of " forming a connecting link ", avoid basic unit directly to contact with surface layer.And, because the rubber grain in truss core structure disperses to arrange, make transition zone there is larger void content, this large porosity and highly certain lattice structure can be blocked the upwards transmission of tensile stress continuation that basic crack produces well, effectively improve the distribution of road structure stress, alleviated the stress concentration phenomenon at crack place.In addition, geotextile itself can play distortion, can bear certain basic crack tensile stress, thereby has improved the tensile strength of whole truss core coiled material.
3, the pavement transition layer that contains truss core structure has possessed the energy-absorbing advantage of lattice structure, can either absorb the load pressure transmitting from stress absorbing layer, can absorb again the part tensile energy of seam crossing reflection stress.Geotextile is to be formed by pliable and tough fibrage, have larger elongation per unit length and tensile strength respectively to uniformity, rubber grain possess goodish supporting capacity and distortion adaptive capacity, also can play endergonic effect.The transition composite bed that rubber asphalt stress absorbing layer and truss core coiled material are combined into is laid between semi-rigid type base and asphalt concrete pavement, be equivalent to be provided with an elastic layer in road, basic crack tensile stress is by there being the elastic layer of thickness to expand to more wide region, thereby alleviate crack place stress intensity, the generation of prevention and delayed reflex crackle and upwards extension.
4, the truss core structure that there is certain altitude itself have block, filtered water stream effect, with polyester nonwoven acupuncture geotextile material make surface layer have stronger bituminizing ability, the upper layer of truss core coiled material is wrapped to one deck petroleum bitumen, after it is combined with asphalt surface course, can form one and effectively prevent that sleet water from infiltrating the waterproofing membrane of substructure, can give full play to waterproof and drainage, avoid semi-rigid sub-base material to suffer sleet water erosion, guarantee foundation base intension.In addition, rubber asphalt stress absorbing layer can form certain thickness asphalt membrane, and its cementitious materials has played sealing process to semi-rigid type base, can effectively prevent that equally moisture from immersing in basic unit, bringing into play the effect of protecting roadbed.
5, truss core coiled material is the space structures that has certain altitude, thereby possesses heat stability, absorbs heat in the time that temperature raises, energy release heat in the time that temperature reduces, can alleviate the variations in temperature of roadbase, reduce the thermal (temperature difference) stress of basic unit, thereby suppress the generation of semi-rigid type base thermal cracking.
6, rubber asphalt stress absorbing layer has formed the high viscoelastic medium of one deck 1cm left and right thickness between semi-rigid type base and truss core coiled material, by the interlock action of rubble, levels can be connect and becomes entirety, be conducive to structural entity stressed, improve the application life on road surface.On the other hand, the bituminous cements in stress absorbing layer can be filled up the part microcrack and the space that on semi-rigid type base, produce, effectively stops reflection crack to continue upwards to transmit.Stress absorbing layer is a kind of flexible system, and concentrated stress is had to significant buffering and absorption, thereby has reduced the tensile stress that under truss core coiled material, surface layer bears, and has played the effect of protection truss core coiled material.
7, adopt the truss core structure of rubber grain and geotextile composition as the transition composite bed on road surface, consider that pavement transition layer can effectively stop the reflection crack that delays basic unit to be propagated to asphalt surface course, reduce the generation of road disease, therefore can suitably reduce the crack resistance requirement to asphalt concrete pavement material and reduce the thickness of asphalt concrete pavement.Meanwhile, rubber asphalt stress absorbing layer is combined with asphalt concrete pavement while laying, and rubber asphalt stress absorbing layer can also further reduce the laying depth of rubber asphalt surface layer, saves construction cost.The lower floor of pitch can consider to adopt plain asphalt.What the minimizing of material usage and crack resistance required lowers, and has not only saved the cost that asphalt pavement material need to spend, and has also reduced road and has moved later maintenance and maintenance cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of truss core coiled material.
Fig. 2 is the plan view that in truss core coiled material, dot matrix is arranged.
Fig. 3 is the stereogram of truss core coiled material.
Fig. 4 is respectively the schematic diagram of the rubber grain of regular triangular prism, cylinder, four-prism and positive hexagonal prism shape.
Fig. 5 a be in truss core coiled material rubber grain by the stereogram of triangular arranged.
Fig. 5 b be in truss core coiled material rubber grain by the plan view of triangular arranged.
Fig. 5 c be in truss core coiled material rubber grain by the stereogram of square arrangement.
Fig. 5 d be in truss core coiled material rubber grain by the plan view of square arrangement.
Fig. 6 is the schematic diagram of T shape jointing apparatus.
Fig. 7 is the detailed view of truss core coiled material stitching portion.
Fig. 8 is the schematic perspective view of transition composite bed of the present invention.
Fig. 9 is the flexible pavement overall structure schematic diagram that contains transition composite bed of the present invention.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can be combined mutually.
Referring to Fig. 1-5d, wherein show a kind of embodiment according to truss core coiled material of the present invention.Truss core coiled material is divided into three layers, be followed successively by from top to bottom geotextile 1, the cylinder rubber grain 2 that wraps petroleum bitumen and the geotextile 3 that wraps rubber asphalt, cylinder rubber grain 2 be wherein arranged in the form of dot matrix between the geotextile 3 that wraps the geotextile 1 of petroleum bitumen and wrap rubber asphalt and with its close contact, cylinder rubber grain is periodic regular and arranges between two-layer geotextile.Preferably, the geotextile 3 that wherein wraps the geotextile 1 of petroleum bitumen and wrap rubber asphalt can arrange respectively one deck or multilayer.While manufacturing truss core coiled material, cylinder rubber grain 2 is closely compressed between two-layer geotextile by machine, coiled material is made rear available spool and is rolled.Truss core coiled material has good pliability, can bending be wrapped on spool or tile stretching, extension in the plane, so that the loading in work progress and transportation.Consider that this truss core coiled material compressive property is better, in work progress, can take the mode of multilayer coiled material stack as the pavement transition layer of control reflection crack according to actual conditions.
Preferably, two-layer geotextile wherein can be polyester acupuncture nonwoven geotextiles, and thickness can be 1.5～2.5mm.The manufacture method of polyester acupuncture nonwoven geotextiles is for adopting extruding and orientation stretching technology that long filament or short fiber are arranged and reticulated, allow different fibers mutually be wound around to be consolidated through needling process again make fabric specification, then be processed into the cloth shape surface layer of water permeability by trimming lapper.
Referring to Fig. 6-7, T shape jointing apparatus 6 for connecting between truss core coiled material and the schematic diagram of the truss core coiled material being connected with T shape jointing apparatus 6 are wherein shown respectively.T shape jointing apparatus 6 can adopt polyester nonwoven acupuncture geotextiles to make, this device is inserted into the joint of two blocks of truss core coiled materials of continuous splicing, and cement with heated bitumen or mulseal, with suture, the upper layer of T shape jointing apparatus 6 and two blocks of truss core coiled materials is sewed up again, made two blocks of coiled materials firmly be coupled to an entirety.Preferably, the lap width of T shape jointing apparatus 6 and two surface layers is not less than 5cm, suture should have with polyester nonwoven acupuncture geotextiles quite or exceed the characteristic of its resistance to chemical attack, and be the material of antiultraviolet.
Referring to Fig. 8, wherein show the lattice structure transition composite bed between asphalt concrete pavement and semi-rigid type base.Composite bed comprises as the truss core coiled material as described in reference to accompanying drawing 1-5d and rubber asphalt stress absorbing layer 5 is thereunder set.Rubber asphalt stress absorbing layer 5 is to adopt the stress absorbing layer of rubber asphalt as cementitious matter, and spread wraps the rubble of pitch in advance, and ballast grain sizes is 5～10mm, and the thickness of stress absorbing layer is 10～12mm.Construction sequence mainly contains: first spread 2～3kg/m on road surface
2rubber asphalt, on the rubber asphalt cement completing in sprinkling evenly spreading particle diameter to be 5～10mm wrap asphalt macadam in advance, and then with pneumatic-tired rollers, asphalt macadam is carried out to embedded squeezing and rolls, be finally compacted into the deck of 1cm left and right thickness.
Referring to Fig. 9, wherein show the integrally-built schematic perspective view of flexible pavement that comprises the lattice structure transition composite bed according to the present invention.As shown in the figure, between asphalt concrete pavement 4 and semi-rigid type base 7, be provided with successively from top to bottom truss core coiled material and the rubber asphalt stress absorbing layer 5 as shown in Fig. 1-5d.
Use lattice structure transition composite bed according to the present invention to carry out the method for pavement construction by describing in detail by preferred embodiment below.It should be noted that this construction method is only to implement a kind of preferred embodiment of the present invention, those skilled in the art can make various modifications and improvement to it, and do not depart from scope of the present invention.
1. use rubber asphalt premixed macadam, make rubble surface wrap in advance rubber asphalt.For guaranteeing to be spread in the well-bonded of rubble in basic unit and rubber asphalt, the rubble before laying need adopt heated bitumen to wrap up in advance in advance, and the weight ratio of pitch and rubble is 0.40～0.60%, and while wrapping, asphalt temperature is more than 120 ℃.The pilling up time that gathers materials wrapping in advance should not exceed two weeks, should keep rubble surface to be wrapped with pitch but state that can be not adhered to one another between rubble.
2. dust, discrete particles and the foreign material on cleaning semi-rigid type base.The surface of semi-rigid type base should be smooth, not hollowing cracking, not dusting, and position sharp-pointed in road pavement, projection will be evened out, otherwise can affect surperficial adhesion stress.Meanwhile, for preventing occurring space between semi-rigid type base and coiled material, the defects such as air-blowing, alice, should guarantee before making coiled material that semi-rigid type base is fully dry.Longitudinal planeness of semi-rigid type base, the gradient in cross section, smooth degree, and the degree of compaction on road surface should strictly detect, and reaches designing requirement and quality specifications and just can carry out the laying of truss core coiled material.
3. on the semi-rigid type base of handling well, spray rubber asphalt.In spread process, distribution vehicle need remain a constant speed and travel to guarantee that spread is even, and the spread temperature of pitch is controlled at 190 ℃～200 ℃ or higher.The consumption of rubber asphalt is 2～3kg/m
2, pitch sprinkling amount will strictly be controlled, and sprays should not exceed ± 0.2kg/m of maximum deviation amount
2.Rubber asphalt consumption is moderate, and after stress absorbing layer is compacted, rubber asphalt should account for 70% left and right of building stones height.The longitudinal linking of pitch should with the 10cm left and right that partly overlaps of spread.In the time carrying out pitch sprinkling, should focus on processing horizontal, longitudinal seam, occur spraying too much or drain spray if local, constructor should take removing or the measure that fills spray in time.
4. spreading rubble on the rubber asphalt having sprayed.After rubber asphalt spread, cause viscosity sharply to rise in order to prevent that temperature from declining, must be followed by using rubble truck spreader spreading to wrap up in advance rubble, the simple grain footpath premixed macadam that the specification of rubble is 5～10mm, the area coverage of spreading reaches 60～70%, and spreading amount is pressed 10kg/m
2control.Require spreading evenly appropriate, in order to guarantee to have good caking property between pitch and rubble, when spreading, asphalt temperature must not be lower than 80 ℃.For avoiding truck spreader and tack coat pitch bonding, the load-carrying wheel of rubble truck spreader can suitably be sprayed water, and the water yield is to infiltrate tire as standard.For guaranteeing construction quality, when spreading rubble, every rubble truck spreader should be equipped with 1～2 constructor again, follows after truck spreader, by clean the rubble cleaning that is scattered in outside.Spread the place of paving quantity not sufficient for local rubble, should manually supply, make building stones and the rubber asphalt of repairing well-bonded, form the complete structure body of mutual embedded squeezing.
5. rubber asphalt stress absorbing layer is rolled to form in the road surface after pair spreading rubble.After spreading rubble, should carry out immediately rolling operation, in construction, in order to ensure the temperature rolling, should roll back and forth 2～3 times immediately following rubble truck spreader with heavy pneumatic-tired rollers in time.While rolling, follow principle first quick and back slow, will seal traffic therebetween.For preventing sticky wheel phenomenon, on pneumatic-tired rollers tire, can suitably spray water.In rolling, while there is non-uniform phenomenon for the part of making, should carry out in time artificial treatment, and arrange as early as possible the laying of truss core coiled material, avoid stress absorbing layer to be subject to secondary pollution.
6. the rubber asphalt stress absorbing layer surface spreading pitch sticking layer oil of cleaning out.Preferably use the pitch sticking layer oil that has good crack resistance and thermostability energy through vinyl-vinyl acetate copolymer (EVA) or styrene butadiene styrene block copolymer (SBS) (SBS) modification.If when sticking layer oil is liquid petroleum pitch, atmospheric temperature will be more than 5 ℃; If when sticking layer oil is mulseal, its bitumen content must be greater than 60%, and atmospheric temperature will be more than 10 ℃.When rainy day or road surface are moist, must not spray sticking layer oil.Adopt twice sprinkling, the oil mass of spraying is for the first time 0.4～0.6kg/m
2, oil temperature remains between 150～170 ℃, and the lateral extent of spraying sticking layer oil should be than the wide 5～10cm of polyester acupuncture nonwoven geotextiles of truss core coiled material.Sticking layer oil metering is wanted accurately, to spray and want evenly.
7. lay prefabricated truss core coiled material.The upper and lower surface layer of truss core coiled material is made by polyester acupuncture nonwoven geotextiles, the thickness 1.5～2.5mm of surface layer, the column rubber grain that is 2～8mm according to the tight fixed height that periodically puts in order between layer and lower surface layer in the above.Prepare after truss core coiled material with machine, for easy construction, reduce on-the-spot stitching capacity, before construction, should, according to on-the-spot length needs, coiled material be carried out to cutting by paving length, and be spliced into the block of the size that meets the requirements, spooled with spool, be transported to road construction scene.The work of laying truss core coiled material must complete before sticking layer oil caking property loses, while adopting artificial laying, truss core coiled material is laid on the rubber asphalt stress absorbing layer that has sprayed pitch sticking layer oil, and a layback fastens, and is close to stress absorbing layer surface and lays forward straightly.Also can one end of truss core coiled material be fixed with staple, staple can be selected with cement nail or nailing.In the time that road need to be turned, the border of truss core coiled material can be cut into suitable circular shape and lay.
8. the adjacent truss core coiled material of overlap joint.Can adopt the T shape jointing apparatus that polyester nonwoven acupuncture geotextiles is made to overlap, jointing apparatus is inserted into two truss core coiled material joints of continuous splicing, and cement with heated bitumen or mulseal, with suture, the upper layer of T shape jointing apparatus and two blocks of truss core coiled materials is sewed up again, made two blocks of coiled materials firmly be coupled to an entirety.The lap width of T shape jointing apparatus and two surface layers is not less than 5cm, the suture of overlapping part should be straight, stitch should be even, suture must have with polyester nonwoven acupuncture geotextiles quite or exceed the characteristic of its resistance to chemical attack, and be the material of antiultraviolet.
9. on the truss core coiled material having overlapped, spray pitch sticking layer oil.After the stitching work of truss core coiled material stitching portion completes, spray the sticking layer oil of same kind on the upper layer of truss core coiled material, consumption is 0.4～0.6kg/m approximately
2, oil temperature remains between 150～170 ℃.After sticking layer oil cooling number hour, spread a small amount of aggregate chips or fine sand at the upper surface of truss core coiled material, be used for preventing when rubber-tyred roller from rolling tyre slip or truss core coiled material is taken up.
10. asphalt concrete pavement.After truss core coiled material paves, should fill in time bituminous concrete and cross for a long time and be directly exposed to the sun to avoid truss core coiled material to be subject to sunlight, and guarantee the degree of compaction of asphalt concrete pavement.
Reduce or delayed the generation of reflection crack according to the transition composite bed for asphalt concrete pavement of the present invention, greatly reduce the generation of the asphalt surface course disease causing due to sub-surface crack, guarantee flexible pavement application life, significantly to reduce the maintenance cost in road later stage.In addition, the rubber grain that junked tire is made into is applied in the pavement transition layer that truss core coiled material is set, and has solved accumulation and the pollution problem of abandoning in a large number tire at present, integrates environmental protection and resource regeneration.
Although the disclosed embodiment of the present invention as above, the embodiment that described content just adopts for the ease of understanding the present invention, not in order to limit the present invention.Technician in any the technical field of the invention; do not departing under the prerequisite of the disclosed spirit and scope of the present invention; can do any modification and variation what implement in form and in details; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (9)
1. one kind has the flexible pavement of lattice structure transition composite bed, it is characterized in that, between the semi-rigid type base (7) of flexible pavement and asphalt concrete pavement (4), dot matrix structural transition composite bed is set, described lattice structure transition composite bed comprises rubber asphalt stress absorbing layer (5) and is close to the truss core coiled material of described rubber asphalt stress absorbing layer (5) top, described truss core coiled material is divided into three layers, be followed successively by from top to bottom the geotextile (1) that wraps petroleum bitumen, cylinder rubber grain (2) and wrap the geotextile (3) of rubber asphalt, described in wherein said cylinder rubber grain (2) is arranged in the form of dot matrix, wrap petroleum bitumen geotextile (1) and described in wrap between the geotextile (3) of rubber asphalt and with its close contact.
2. flexible pavement according to claim 1, it is characterized in that, between described truss core coiled material, connect with T shape jointing apparatus (6), and cementing with heated bitumen or mulseal in junction, with suture, described T shape jointing apparatus (6) and the upper layer of two blocks of truss core coiled materials are sewed up again, made two blocks of truss core coiled materials firmly be coupled to an entirety.
3. flexible pavement according to claim 1, is characterized in that, described rubber asphalt stress absorbing layer (5) is to adopt the stress absorbing layer of rubber asphalt as cementitious matter, and in rubber asphalt, spread wraps the rubble of pitch in advance.
4. flexible pavement according to claim 1 and 2, is characterized in that, described in wrap petroleum bitumen geotextile (1) and described in wrap rubber asphalt geotextile (3) be polyester acupuncture nonwoven geotextiles.
5. flexible pavement according to claim 1, it is characterized in that, the described geotextile (1) that wraps petroleum bitumen and described in wrap the geotextile (3) of rubber asphalt thickness be 1.5～2.5mm, the height of described cylinder rubber grain (2) is 2～8mm, and the thickness of described rubber asphalt stress absorbing layer (5) is 10～12mm.
6. a construction method for flexible pavement as described in any one in claim 1-5, is characterized in that, comprises the following steps:
(1) the truss core coiled material that is prefabricated in the factory, rubber grain identical size is closely compressed between two-layer geotextile with periodicity arrangement form with machine, layer of geotextile surface wraps with rubber asphalt dipping below, layer of geotextile surface wraps with petroleum bitumen dipping above, then the truss core coiled material of moulding is carried out to cutting by paving length, after spooling with spool, be transported to road construction scene;
(2) use the hard rubble of rubber asphalt premixing particle diameter 5～10mm stone matter, make rubble surface wrap in advance rubber asphalt;
(3) dust, discrete particles and the foreign material on cleaning semi-rigid type base;
(4) on the semi-rigid type base of handling well, spray rubber asphalt;
(5) on the rubber asphalt having sprayed, spreading wraps the rubble of rubber asphalt in advance;
(6) rubber asphalt stress absorbing layer is rolled to form in the road surface after spreading rubble;
(7) the rubber asphalt stress absorbing layer surface spreading pitch sticking layer oil of cleaning out;
(8) lay prefabricated truss core coiled material and overlap adjacent truss core coiled material;
(9) on the truss core coiled material having overlapped, spray pitch sticking layer oil;
(10) asphalt concrete pavement.
7. construction method as claimed in claim 6, is characterized in that, in described step (2), the weight ratio of rubber asphalt and rubble is 0.40～0.60%, and while wrapping, the temperature of pitch is more than 120 ℃.
8. construction method as claimed in claim 6, is characterized in that, the spread temperature of described step (4) medium pitch is controlled at 190～200 ℃, and the consumption of rubber asphalt is 2～3kg/m
2.
9. construction method as claimed in claim 6, is characterized in that, the pitch sticking layer oil using in described step (7) and described step (9) is the pitch sticking layer oil through EVA or SBS modification, and each oil mass of spraying is 0.4～0.6kg/m
2, oil temperature remains between 150～170 ℃.
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| CN106049220A (en) * | 2016-06-01 | 2016-10-26 | 中国建筑第七工程局有限公司 | Asphalt overlay wet-process construction method |
| CN107503262B (en) * | 2017-08-18 | 2020-06-09 | 中交第二公路勘察设计研究院有限公司 | Preparation method of coiled material for preventing and treating reflection cracks of semi-rigid base asphalt pavement |
| CN111424491A (en) * | 2019-05-22 | 2020-07-17 | 河北工业大学 | Quick repairing process for assembled asphalt pavement pit slot |
| CN112144342A (en) * | 2020-08-19 | 2020-12-29 | 中国一冶集团有限公司 | Damaged pavement repairing plate structure and repairing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167356A (en) * | 1976-04-08 | 1979-09-11 | Consiliul Popular Al Judetului Braila | Roadway structures |
| JP2006052558A (en) * | 2004-08-11 | 2006-02-23 | Masuoka Yogyo Genryo Kk | Tile-facing permeable paving method using granulated material, and permeable tile-faced block |
| CN101092808A (en) * | 2007-07-17 | 2007-12-26 | 上海浦东路桥建设股份有限公司 | Stress absorption structured llayer of discontinuous ajar particle distribution limit mixture for asphaltum with high viscosity |
| CN101148856A (en) * | 2007-11-12 | 2008-03-26 | 徐培华 | Asphalt macadam stress absorption layer and construction method thereof |
| CN102535299A (en) * | 2010-12-31 | 2012-07-04 | 安通建设有限公司 | Construction method of stress absorbing layer for road repairing |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167356A (en) * | 1976-04-08 | 1979-09-11 | Consiliul Popular Al Judetului Braila | Roadway structures |
| JP2006052558A (en) * | 2004-08-11 | 2006-02-23 | Masuoka Yogyo Genryo Kk | Tile-facing permeable paving method using granulated material, and permeable tile-faced block |
| CN101092808A (en) * | 2007-07-17 | 2007-12-26 | 上海浦东路桥建设股份有限公司 | Stress absorption structured llayer of discontinuous ajar particle distribution limit mixture for asphaltum with high viscosity |
| CN101148856A (en) * | 2007-11-12 | 2008-03-26 | 徐培华 | Asphalt macadam stress absorption layer and construction method thereof |
| CN102535299A (en) * | 2010-12-31 | 2012-07-04 | 安通建设有限公司 | Construction method of stress absorbing layer for road repairing |
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