CN110965422A - Flexible splicing paving structure and construction method thereof - Google Patents
Flexible splicing paving structure and construction method thereof Download PDFInfo
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- CN110965422A CN110965422A CN201911283702.4A CN201911283702A CN110965422A CN 110965422 A CN110965422 A CN 110965422A CN 201911283702 A CN201911283702 A CN 201911283702A CN 110965422 A CN110965422 A CN 110965422A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
- E01C5/08—Reinforced units with steel frames
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
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Abstract
The invention discloses a flexible splicing paving structure and a construction method thereof.A formed notch comprises a concrete plate with a deformation joint, a notch steel plate is arranged above the concrete plate at a position corresponding to the deformation joint, a lower layer of large-deformation high-elasticity asphalt mixture is paved on the upper surface of the concrete plate, and an upper layer of anti-rutting high-elasticity asphalt mixture is paved on the upper surface of the lower layer of large-deformation high-elasticity asphalt mixture; the notch steel plate forms a bulge towards the direction of the high-elastic asphalt mixture with large deformation of the lower layer at the position corresponding to the deformation joint. The double-layer asphalt mixture is adopted to replace the traditional asphalt mixture, the upper-layer anti-rutting high-elasticity asphalt mixture overcomes the defect of insufficient high-temperature stability of the traditional asphalt mixture, the lower-layer large-deformation high-elasticity asphalt mixture overcomes the defect of poor deformation resistance of the traditional asphalt mixture, and the anti-rutting high-elasticity asphalt mixture can be widely used for treating the pavement deformation joints of the newly-built tunnel and repairing the pavement surface cracks of the in-service tunnel, and has high deformation resistance and good anti-rutting capability.
Description
Technical Field
The invention relates to a flexible splicing paving structure, in particular to a flexible splicing paving structure and a construction method thereof.
Background
The tunnel pavement is mainly of a pavement structure, with the prolonging of service life, various road performances of the pavement structure are attenuated year by year, and the tunnel pavement gradually enters a centralized maintenance stage. The typical defects of the existing tunnel pavement mainly comprise pavement skid resistance attenuation, reflection cracks at deformation joint positions and the like, wherein the most typical reflection crack defects become main factors influencing the service life of a tunnel pavement structure. At present, a common modified asphalt mixture and a resin-based mixture are mainly adopted as filling materials in a reflection crack repairing mode, although the problem of cracks of a bridge and tunnel pavement structure is relieved to a certain extent, the filling materials are poor in deformation resistance and capable of bearing the maximum deformation of +/-2.5 cm, and deformation requirements are difficult to meet at positions with large deformation such as deformation joints at an entrance and an exit of a tunnel and structural settlement joints in the tunnel, so that secondary crack diseases are easy to occur after the filling materials are applied for a period of time, and the durability of the filling materials is not enough.
Therefore, the research on the crack treatment structure which has excellent performance after pavement and can avoid the damage of water to a pavement layer structure has great significance.
In view of the technical defects of the existing splicing and paving structure, the inventor of the invention actively researches and innovates based on practical experience and professional knowledge which is abundant for years in the design and manufacture of the products and by matching with the application of theory, so as to create a flexible splicing and paving structure and a construction method thereof, and the flexible splicing and paving structure has higher practicability. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The invention mainly aims to overcome the defects of the existing tunnel crack splicing structure, and provides a flexible splicing paving structure and a construction method thereof, wherein the flexible splicing paving structure is flatly jointed with the original pavement and is waterproof, and water is effectively prevented from entering deformation joints to damage the original paving structure; thereby being more practical and having industrial utilization value.
The technical purpose of the invention is realized by the following technical scheme:
a flexible splicing paving structure is a combined structure, a concrete plate with a deformation joint is arranged in a formed notch, a notch steel plate is arranged above the concrete plate and corresponds to the deformation joint, a lower layer of large-deformation high-elasticity asphalt mixture is paved on the upper surface of the concrete plate, and an upper layer of anti-rutting high-elasticity asphalt mixture is paved on the upper surface of the lower layer of large-deformation high-elasticity asphalt mixture;
the notch steel plate forms a bulge towards the direction of the high-elastic asphalt mixture with large deformation of the lower layer at the position corresponding to the deformation joint.
In the preferred flexible splicing paving structure, the lower layer large-deformation high-elasticity asphalt mixture consists of polymer modified asphalt and single-particle-size basalt aggregate; the upper layer anti-rutting high-elasticity asphalt mixture consists of polymer modified asphalt and continuous open-graded basalt aggregate.
The preferable flexible splicing paving structure is that the polymer modified asphalt comprises the following components: 100 parts of matrix asphalt, 15-25 parts of 80-250 nm nano-scale rubber powder, 10-15 parts of 0.5-1 cm rubber particles, 2-5 parts of an activating agent, 1-2.5 parts of an epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fibers and 6-10 parts of a composite synergist; the matrix asphalt is 70#、90#、110#One of a base asphalt; the nano-scale rubber powder and rubber particles are prepared by combining one or two of waste tires and hevea rubber latex; the activating agent is one of sodium hypochlorite, chlorous acid, dichromic acid and waste engine oil; the epoxy adhesive is one of glycidyl ester epoxy resin, glycidyl amine epoxy resin and glycidyl ether epoxy resin; the polyvinyl alcohol fiber is prepared by taking polyvinyl alcohol as a raw material; 30-75% of a composite synergist.
In the preferable flexible splicing paving structure, the basalt aggregate with single particle size is one of 5-10 mm, 10-13 mm and 13-20 mm; the thickness of the lower-layer large-deformation high-elasticity asphalt mixture is 3-9 cm; the particle size of the continuous open-graded basalt aggregate is 5-13 mm, 5-20 mm or 10-20 mm, and the thickness of the upper anti-rutting high-elasticity asphalt mixture is 3-6 cm.
In the preferable flexible splicing paving structure, the shape of the protrusion of the notch steel plate towards the direction of the lower layer large-deformation high-elasticity asphalt mixture is any one of a trapezoid without a bottom edge, a square without a bottom edge, a rectangle without a bottom edge, an arc and a triangle without a bottom edge; wherein, the preferred protruding structure is a trapezoidal structure without a bottom edge, and the thickness of the notch steel plate is 5-10 mm, the net height is 10-30 mm, and the width is 150-200 mm; the left and right side plates of the notch steel plate and the top plate are respectively bent by 135 degrees and 45 degrees along the clockwise direction; the position department through corresponding the movement joint forms the arch, forms one and secretly buries formula escape canal groove, in time drains the in situ moisture of mating formation, reduces the destruction of moisture to the layer structure of mating formation.
The preferred flexible splicing pavement structure is characterized in that anchoring rods are symmetrically arranged on two inner side walls of the notch respectively, each anchoring rod comprises a lower anchoring rod and an upper anchoring rod, the lower anchoring rod is arranged at a position close to the bottom surface of the notch, the upper anchoring rod is arranged at a position close to the top surface of the notch, and at least one end of each of the lower anchoring rod and the upper anchoring rod is arranged into an anchoring structure for improving firmness with a connecting part; the preferred mode of setting is 3~ 8cm in anchor pole deepens into the former structure of mating formation of both sides, and anchor structure is the structure that can increase with the area of contact of connection position such as "bent clip structure", "is square crotch structure", "annular structure of buckling", wherein the crotch direction of anchor pole down is towards the higher authority, goes up the crotch direction of anchor pole and is towards the lower authority.
The optimized flexible splicing paving structure is characterized in that a spring pull rod is arranged between two inner side walls of the notch, and two ends of the spring pull rod are respectively fixed with the inner side walls of the notch; the more preferred spring pull rod perpendicular to driving direction's transverse arrangement interval is 10~ 30cm, and a more preferred connected mode does, is fixed in the notch inside wall with fixed angle steel, and fixed angle steel bottom is apart from notch steel sheet notch upper surface 1~ 2cm department, and it is 10~ 30cm to reserve protruding bolt interval in the fixed angle steel, and the spring pull rod both ends are fixed with the protruding bolted connection of fixed angle steel.
The optimal flexible splicing pavement structure is characterized in that interface binders are respectively coated on the bottom and the side faces of a notch and the outer surface of a notch steel plate, second-order epoxy resin is selected as the interface binders in an optimal mode, and the coating amount is 0.5-1 kg/m2；
The construction method of the flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using positioning pins, wherein the distance between the preferable positioning pins is less than or equal to 50 cm;
s3, filling a lower layer of large-deformation high-elasticity asphalt mixture in the groove opening, and tamping;
and S4, filling the upper layer of anti-rutting high-elasticity asphalt mixture above the lower layer of large-deformation high-elasticity asphalt mixture, tamping the mixture to be flush with the upper surface of the notch, and forming a flexible splicing paving structure.
The construction method of the preferable flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using positioning pins, wherein the distance between the preferable positioning pins is less than or equal to 50 cm;
s3, installing anchor rods, wherein the arrangement distance of the anchor rods is 10-30 cm, the lower anchor rods are arranged at positions 1/6-1/4 away from the bottom surface of the notch, the upper anchor rods are arranged at positions 1/5-2/3 away from the top surface of the notch, at least one end of each of the lower anchor rods and the upper anchor rods is provided with an anchor structure for increasing the firmness of the connecting part, the anchor structures are structures capable of increasing the contact area with the connecting part, such as a bent clip structure, a square hook structure, a bent annular structure and the like, the hook direction of the lower anchor rods faces the upper surface, and the hook direction of the upper anchor rods faces the lower surface;
s4, filling a lower layer of large-deformation high-elasticity asphalt mixture in the groove opening, and tamping;
and S5, filling the upper layer of anti-rutting high-elasticity asphalt mixture above the lower layer of large-deformation high-elasticity asphalt mixture, tamping the mixture to be flush with the upper surface of the notch, and forming a flexible splicing paving structure.
The construction method of the preferable flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using a positioning pin, wherein the preferable positioning distance is less than or equal to 50 cm;
s3, coating second-order epoxy resin interface binders on the bottom and the inner side wall of the notch and the outer surface of the notch steel plate respectively, wherein the preferable coating amount is 0.5-1 kg/m2；
S4, filling a lower layer of large-deformation high-elasticity asphalt mixture in the groove opening, and tamping;
and S5, filling the upper layer of anti-rutting high-elasticity asphalt mixture above the lower layer of large-deformation high-elasticity asphalt mixture, tamping the mixture to be flush with the upper surface of the notch, and forming a flexible splicing paving structure.
The construction method of the preferable flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using positioning pins, wherein the distance between the preferable positioning pins is less than or equal to 50 cm;
s3, coating second-order epoxy resin interface binders on the bottom and the inner side wall of the notch and the outer surface of the notch steel plate respectively, wherein the preferable coating amount is 0.5-1 kg/m2；
S4, installing anchor rods, wherein the arrangement distance of the anchor rods is 10-30 cm, the lower anchor rods are arranged at positions 1/6-1/4 away from the bottom surface of the notch, the upper anchor rods are arranged at positions 1/5-2/3 away from the top surface of the notch, at least one end of each of the lower anchor rods and the upper anchor rods is provided with an anchor structure for increasing the firmness of the connecting part, the anchor structures are structures capable of increasing the contact area of the connecting part, such as a bent clip structure, a square hook structure, a bent annular structure and the like, the hook direction of the lower anchor rods faces the upper surface, and the hook direction of the upper anchor rods faces the lower surface;
s5, filling a lower layer of large-deformation high-elasticity asphalt mixture in the groove opening, and tamping;
and S6, filling the upper layer of anti-rutting high-elasticity asphalt mixture above the lower layer of large-deformation high-elasticity asphalt mixture, tamping the mixture to be flush with the upper surface of the notch, and forming a flexible splicing paving structure.
The construction method of the preferable flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using positioning pins, wherein the distance between the preferable positioning pins is less than or equal to 50 cm;
s3, coating second-order epoxy resin interface binders on the bottom and the inner side wall of the notch and the outer surface of the notch steel plate respectively, wherein the preferable coating amount is 0.5-1 kg/m2；
S4, mounting fixed angle steel, wherein the distance between the bottom of the fixed angle steel and the upper surface of the notch steel plate is 1-2 cm;
s5, filling a lower-layer large-deformation high-elasticity asphalt mixture to the bottom of the fixed angle steel, and tamping by adopting a plate compactor;
s6, installing spring pull rods, wherein the arrangement distance of the spring pull rods is 10-30 cm, and two ends of each spring pull rod are fixedly connected with a reserved protruding bolt in each fixed angle steel;
s7, filling the residual lower-layer large-deformation high-elasticity asphalt mixture, and tamping by adopting a plate compactor;
and S8, filling the upper-layer anti-rutting high-elasticity asphalt mixture, tamping the mixture by using a plate compactor, and leveling the mixture with the upper surface of the notch to form a flexible splicing paving structure.
The construction method of the preferable flexible splicing paving structure comprises the following operation steps,
s1, cutting off an original pavement structure above deformation joints to enable the deformation joints between the surface and the plates of the concrete plate to appear to form notches, wherein the preferred width of the notches is 30-70 cm;
s2, paving a notch steel plate right above a deformation joint between concrete slabs, and fixing the notch steel plate on one side by using positioning pins, wherein the distance between the preferable positioning pins is less than or equal to 50 cm;
s3, coating second-order epoxy resin interface binders on the bottom and the inner side wall of the notch and the outer surface of the notch steel plate respectively, wherein the preferable coating amount is 0.5-1 kg/m2；
S4, installing anchor rods, wherein the arrangement distance of the anchor rods is 10-30 cm, the lower anchor rods are arranged at positions 1/6-1/4 away from the bottom surface of the notch, the upper anchor rods are arranged at positions 1/5-2/3 away from the top surface of the notch, at least one end of each of the lower anchor rods and the upper anchor rods is provided with an anchor structure for increasing the firmness of the connecting part, the anchor structures are structures capable of increasing the contact area of the connecting part, such as a bent clip structure, a square hook structure, a bent annular structure and the like, the hook direction of the lower anchor rods faces the upper surface, and the hook direction of the upper anchor rods faces the lower surface;
s5, mounting a fixed angle steel, wherein the bottom of the fixed angle steel is preferably 1-2 cm away from the upper surface of the notch steel plate;
s6, filling a lower-layer large-deformation high-elasticity asphalt mixture to the bottom of the fixed angle steel, and tamping by adopting a plate compactor;
s7, installing spring pull rods, wherein the arrangement distance of the spring pull rods is 10-30 cm, and two ends of each spring pull rod are fixedly connected with a reserved protruding bolt in each fixed angle steel;
s8, filling the residual lower-layer large-deformation high-elasticity asphalt mixture, and tamping by adopting a plate compactor;
and S9, filling the upper-layer anti-rutting high-elasticity asphalt mixture, tamping the mixture by using a plate compactor, and leveling the mixture with the upper surface of the notch to form a flexible splicing paving structure.
In conclusion, the invention has the following beneficial effects:
(1) the invention adopts the double-layer asphalt mixture to replace the traditional asphalt mixture, the upper anti-rutting high-elasticity asphalt mixture overcomes the defect of insufficient high-temperature stability of the traditional asphalt mixture, and the lower large-deformation high-elasticity asphalt mixture overcomes the defect of poor deformation resistance of the traditional asphalt mixture, so that the invention can be widely used for treating the deformation joints of the newly-built tunnel pavement and repairing the surface cracks of the in-service tunnel pavement, and has large deformation resistance and good anti-rutting capability;
(2) the invention is connected with the original road surface smoothly and is completely waterproof, thereby effectively preventing water from entering the deformation joint to damage the original pavement structure; the concrete slabs are paved by adopting semi-fixed notch steel plates, so that the phenomenon that aggregates fall into deformation joints in the construction process is reduced, and a buried drainage ditch is formed in the raised notch of the steel plates, water in a pavement layer is drained timely, and the damage of the water to the pavement layer structure is reduced;
(3) the lower layer of the flexible splicing pavement structure adopts an ultra-large-dosage oilstone ratio and single-particle-size aggregate of 1: 3.3-1: 2.5, the high-elasticity asphalt cement is used for absorbing the telescopic deformation of a concrete slab, and meanwhile, the single-particle-size aggregate is extruded to gradually form a gap skeleton structure under a certain compression condition, so that the deformation of the pavement structure is effectively limited, the requirement of the deformation amount of +/-3.5 cm in the horizontal direction can be met, the deformation amount can meet the requirement of large deformation amounts at the entrance and exit positions of a tunnel and the positions of structural settlement joints in the tunnel, and for common asphalt mixtures and resin-based mixtures, the ductility and the elastic recovery rate of the common asphalt mixtures and resin-based mixtures are lower, so that the flexible splicing pavement structure is not suitable for treating the; the upper layer adopts a large-dosage oilstone ratio of 1: 6.7-1: 4 and continuous open-graded particle size aggregate, a suspended gap skeleton structure is formed inside the continuous open-graded aggregate, the pavement structure has good traffic bearing capacity, the whole pavement structure can effectively absorb horizontal and vertical deformation generated by the expansion and contraction of a concrete slab and the load action of a vehicle, and the occurrence probability of reflection cracks of the pavement structure is greatly reduced.
Drawings
FIG. 1 is a schematic view of a flexible splice paving structure of the present invention;
FIG. 2 is a partially enlarged schematic view of the connection between the two ends of the spring pull rod and the bolts reserved in the fixed angle iron;
notation in the figures: 1-deformation joint, 2-concrete plate, 3-lower layer large deformation high elastic asphalt mixture, 4-upper layer anti-rutting high elastic asphalt mixture, 5-notch steel plate, 6-interface binder, 7 a-lower anchoring rod, 7 b-upper anchoring rod, 8-fixed angle steel and 9-spring pull rod.
Detailed Description
To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the detailed preparation method, characteristics and effects of the flexible splicing paving structure and the construction method thereof according to the present invention are described in detail as follows.
The following examples used the following sources of raw materials:
matrix asphalt: jiangsu Zhongyi channel New Material Co Ltd
Rubber powder, rubber particles: suzhou Runjie environmental protection New Material Co., Ltd
Activating agent: zhang hong Kong Yi Delong International trade Co Ltd
Epoxy adhesive: glycidyl ester type epoxy resin, ME310, Shanghai shouxing industries Ltd
Polyvinyl alcohol fibers: changzhou Tianyi engineering fiber Co Ltd
Compound synergist: science and technology development Co Ltd of Jiangsu Zhonglu New Material
Example 1
As shown in fig. 1, the flexible splicing paving structure of the invention comprises a deformation joint 1, a concrete slab 2, a lower layer large-deformation high-elasticity asphalt mixture 3, an upper layer anti-rutting high-elasticity asphalt mixture 4, a notch steel plate 5, an interface adhesive 6, a lower anchoring rod 7a, an upper anchoring rod 7b, a fixed angle steel 8 and a spring pull rod 9. The total thickness of the flexible splicing paving structure is 6cm, the thickness of the lower layer large-deformation high-elasticity asphalt mixture is 4cm, and the thickness of the upper layer anti-rutting high-elasticity asphalt mixture is 2 cm. The method comprises the following steps:
s1, forming a 50 cm-wide notch above the deformation joint by adopting a toothless saw, and cleaning the notch to ensure the cleanliness of the notch;
s2, paving a notch steel plate right above the deformation joint, wherein the thickness of the steel plate is 10mm, the net height is 10mm, the width is 200mm, and the left side plate, the right side plate and the top plate of the notch steel plate are respectively bent by 135 degrees and 45 degrees along the clockwise direction and are fixed on the left side of the notch by positioning pins;
s3, respectively coating a second-order epoxy resin interface adhesive produced by road intersection on the bottom, the side face and the outer surface of the notch, wherein the coating weight is 0.7kg/m 2;
s4, installing anchor rods, wherein the arrangement distance of the anchor rods is 15cm, the lower anchor rods are arranged at a position 1/5 away from the bottom surface of the notch, the upper anchor rods are arranged at a position 1/4 away from the top surface of the notch, and the hook direction faces to the upper layer asphalt mixture bonding position and the lower layer asphalt mixture bonding position;
s5, mounting fixed angle steel, wherein the distance between the bottom of the fixed angle steel and the upper surface of the notch steel plate is 1cm, and the distance between the inner protruding bolts of the fixed angle steel is 20 cm;
s6, filling a large-deformation high-elasticity asphalt mixture with the thickness of 3cm into the lower layer, and tamping by adopting a plate compactor; the large-deformation high-elasticity asphalt mixture consists of polymer modified asphalt and basalt aggregate with single grain diameter, and the mass ratio is 30: 100, respectively; the polymer modified asphalt is prepared by compounding 100 parts of matrix asphalt, 20 parts of rubber powder with the particle size of 100nm, 12 parts of rubber particles with the particle size of 0.8cm, 4 parts of sodium hypochlorite activator, 2 parts of glycidyl ester epoxy resin adhesive, 0.8 part of polyvinyl alcohol fiber and 9 parts of composite synergist, wherein the rubber powder is prepared from waste tires; the aggregate is 13-20 mm basalt with single grain size.
S7, mounting spring pull rods, wherein the arrangement distance of the pull rods is 20 cm;
s8, filling the lower layer large-deformation high-elasticity asphalt mixture with the thickness of 1cm, and tamping by using a plate compactor;
s9, filling a 2 cm-thick anti-rutting high-elasticity asphalt mixture on the upper layer, and tamping by adopting a plate compactor; the anti-rutting high-elasticity asphalt mixture consists of polymer modified asphalt and continuous open-graded basalt aggregate, and the mass ratio is 16: the 100 polymer modified asphalt is prepared by compounding 100 parts of matrix asphalt, 20 parts of rubber powder with the particle size of 100nm, 12 parts of rubber particles with the particle size of 0.8cm, 4 parts of sodium hypochlorite activator, 2 parts of glycidyl ester epoxy resin adhesive, 0.8 part of polyvinyl alcohol fiber and 9 parts of composite synergist, wherein the rubber powder is prepared from waste tires; the aggregate is 5-20 mm of continuous open-graded basalt;
s10, opening traffic after curing for 3 hours at normal temperature.
Example 2
As shown in fig. 1, the flexible splicing paving structure of the invention comprises a deformation joint 1, a concrete slab 2, a lower layer large-deformation high-elasticity asphalt mixture 3, an upper layer anti-rutting high-elasticity asphalt mixture 4, a notch steel plate 5, an interface adhesive 6, a lower anchoring rod 7a, an upper anchoring rod 7b, a fixed angle steel 8 and a spring pull rod 9. The total thickness of the flexible splicing paving structure is 10cm, the thickness of the lower layer large-deformation high-elasticity asphalt mixture is 6cm, and the thickness of the upper layer anti-rutting high-elasticity asphalt mixture is 4 cm. The method comprises the following steps:
s1, forming a 60cm wide notch above the deformation joint by adopting a toothless saw, and cleaning the notch to ensure the cleanliness of the notch;
s2, paving a notch steel plate right above the deformation joint, wherein the thickness of the steel plate is 10mm, the net height is 20mm, the width is 200mm, and the left side plate, the right side plate and the top plate of the notch steel plate are respectively bent by 135 degrees and 45 degrees along the clockwise direction and are fixed on the left side of the notch by positioning pins;
s3, respectively coating a second-order epoxy resin interface adhesive produced by road intersection on the bottom, the side face and the outer surface of the notch, wherein the coating weight is 0.7kg/m 2;
s4, installing anchor rods, wherein the arrangement distance of the anchor rods is 15cm, the lower anchor rods are arranged at a position 1/5 away from the bottom surface of the notch, the upper anchor rods are arranged at a position 1/4 away from the top surface of the notch, and the hook direction faces to the upper layer asphalt mixture bonding position and the lower layer asphalt mixture bonding position;
s5, mounting fixed angle steel, wherein the distance between the bottom of the fixed angle steel and the upper surface of the notch steel plate is 1cm, and the distance between the inner protruding bolts of the fixed angle steel is 20 cm;
s6, filling a large-deformation high-elasticity asphalt mixture with the thickness of 4cm into the lower layer, and tamping by adopting a plate compactor; the large-deformation high-elasticity asphalt mixture consists of polymer modified asphalt and basalt aggregate with single grain diameter, and the mass ratio is 33: 100, respectively; the polymer modified asphalt A is prepared by compounding 100 parts of matrix asphalt, 23 parts of rubber powder with the particle size of 150nm, 13 parts of rubber particles with the particle size of 0.6cm, 3 parts of waste engine oil activating agent, 2.2 parts of glycidyl amine epoxy resin adhesive, 1.0 part of polyvinyl alcohol fiber and 8 parts of composite synergist, wherein the rubber powder is prepared from waste tires; the aggregate is 13-20 mm basalt with single grain size.
S7, mounting spring pull rods, wherein the arrangement distance of the pull rods is 20 cm;
s8, filling the lower layer large-deformation high-elasticity asphalt mixture with the thickness of 2cm, and tamping by adopting a plate compactor;
s9, filling a 4 cm-thick anti-rutting high-elasticity asphalt mixture on the upper layer, and tamping by adopting a plate compactor; the anti-rutting high-elasticity asphalt mixture consists of polymer modified asphalt and continuous open-graded basalt aggregate, and the mass ratio is 20: the 100 polymer modified asphalt is prepared by compounding 100 parts of matrix asphalt, 23 parts of rubber powder with the particle size of 150nm, 13 parts of rubber particles with the particle size of 0.6cm, 3 parts of waste engine oil activator, 2.2 parts of glycidyl amine epoxy resin adhesive, 1.0 part of polyvinyl alcohol fiber and 8 parts of composite synergist, wherein the rubber powder is prepared from waste tires; the aggregate is 5-20 mm of continuous open-graded basalt;
s10, opening traffic after curing for 3 hours at normal temperature.
Example 3
As shown in fig. 1, the flexible splicing paving structure of the invention comprises a deformation joint 1, a concrete slab 2, a lower layer large-deformation high-elasticity asphalt mixture 3, an upper layer anti-rutting high-elasticity asphalt mixture 4, a notch steel plate 5, an interface adhesive 6, a lower anchoring rod 7a, an upper anchoring rod 7b, a fixed angle steel 8 and a spring pull rod 9. The total thickness of the flexible splicing paving structure is 15cm, the thickness of the lower layer large-deformation high-elasticity asphalt mixture is 9cm, and the thickness of the upper layer anti-rutting high-elasticity asphalt mixture is 6 cm. The method comprises the following steps:
s1, forming a 70cm wide notch above the deformation joint by adopting a toothless saw, and cleaning the notch to ensure the cleanliness of the notch;
s2, paving a notch steel plate right above the deformation joint, wherein the thickness of the steel plate is 10mm, the net height is 30mm, the width is 200mm, and the left side plate, the right side plate and the top plate of the notch steel plate are respectively bent by 135 degrees and 45 degrees along the clockwise direction and are fixed on the left side of the notch by positioning pins;
s3, at the bottom and the side of the notchThe outer surfaces of the notches are respectively coated with a second-order epoxy resin interface adhesive produced by road intersection, and the coating weight is 0.7kg/m2；
S4, installing anchor rods, wherein the arrangement distance of the anchor rods is 15cm, the lower anchor rods are arranged at a position 1/5 away from the bottom surface of the notch, the upper anchor rods are arranged at a position 1/4 away from the top surface of the notch, and the hook direction faces to the upper layer asphalt mixture bonding position and the lower layer asphalt mixture bonding position;
s5, mounting fixed angle steel, wherein the distance between the bottom of the fixed angle steel and the upper surface of the notch steel plate is 1cm, and the distance between the inner protruding bolts of the fixed angle steel is 20 cm;
s6, filling a large-deformation high-elasticity asphalt mixture with the thickness of 5cm into the lower layer, and tamping by adopting a plate compactor; the large-deformation high-elasticity asphalt mixture consists of polymer modified asphalt and basalt aggregate with single grain diameter, and the mass ratio is 38: 100, respectively; the polymer modified asphalt A is prepared by compounding 100 parts of matrix asphalt, 18 parts of rubber powder with the particle size of 220nm prepared from hevea rubber latex, 15 parts of rubber particles with the particle size of 1.0cm prepared from hevea rubber latex, 5 parts of chlorous acid activating agent, 1.8 parts of glycidyl ether epoxy resin adhesive, 1.2 parts of polyvinyl alcohol fiber and 10 parts of composite synergist; the aggregate is 13-20 mm basalt with single grain size.
S7, mounting spring pull rods, wherein the arrangement distance of the pull rods is 20 cm;
s8, filling the residual 4 cm-thick lower-layer large-deformation high-elasticity asphalt mixture, and tamping by adopting a plate compactor;
s9, filling a 6 cm-thick anti-rutting high-elasticity asphalt mixture on the upper layer, and tamping by adopting a plate compactor; the anti-rutting high-elasticity asphalt mixture consists of polymer modified asphalt and continuous open-graded basalt aggregate, and the mass ratio is 25: the 100 polymer modified asphalt is prepared by compounding 100 parts of matrix asphalt, 18 parts of rubber powder with the particle size of 220nm prepared from hevea rubber latex, 15 parts of rubber particles with the particle size of 1.0cm prepared from hevea rubber latex, 5 parts of chlorous acid activator, 1.8 parts of glycidyl ether epoxy resin adhesive, 1.2 parts of polyvinyl alcohol fiber and 10 parts of composite synergist; the aggregate is 5-20 mm of continuous open-graded basalt;
s10, opening traffic after curing for 3 hours at normal temperature.
Comparative example 1
The comparative example is basically the same as example 1, except that the lower layer large deformation high elastic asphalt mixture and the upper layer anti-rutting high elastic asphalt mixture of the comparative example 1 both adopt common SBS modified asphalt as cementing materials.
Comparative example 2
The comparative example is basically the same as the example 1, except that 0-20 mm of continuous graded aggregate is adopted in both the lower layer large-deformation high-elasticity asphalt mixture and the upper layer anti-rutting high-elasticity asphalt mixture in the example 1.
Comparative example 3
This comparative example is substantially the same as example 2 except that comparative example 2 is not provided with a spring tension bar and an anchor bar.
Comparative example 4
The comparative example is substantially the same as example 3, except that the mass ratio of the polymer modified asphalt to the basalt aggregate in the lower layer large-deformation high-elasticity asphalt mixture and the upper layer anti-rutting high-elasticity asphalt mixture of the comparative example 3 is 5.5: 100.
The dynamic stability of the flexible splicing structure provided by the embodiments 1-3 and the comparative examples 1-4 is tested according to T0719-2011 and the low-temperature bending failure strain of the structure is tested according to T0715-2011 by referring to road engineering asphalt and asphalt mixture test procedures; meanwhile, the deformation amount which can be adapted by the structure is tested by referring to the Texas mat tester test invented by the Texas State traffic science research institute (TTI) in the United states. Test data are recorded to table 1.
TABLE 1 structural Properties
| Degree of dynamic stability (times/mm) | Breaking strain (mu epsilon) | Deflection (cm) | |
| Example 1 | 6351 | 65330 | ±3.50 |
| Example 2 | 6678 | 54475 | ±3.47 |
| Example 3 | 6524 | 55472 | ±3.49 |
| Comparative example 1 | 6407 | 2866 | ±0.46 |
| Comparative example 2 | 5670 | 35605 | ±0.93 |
| Comparative example 3 | 6376 | 25617 | ±1.37 |
| Comparative example 4 | 6654 | 2682 | ±0.55 |
From a comparison of the above experimental data it can be seen that: the dynamic stability of the embodiments 1-3 of the preparation method is basically equivalent to that of the comparative examples 1-3, namely the high-temperature performance of the embodiments prepared by the invention is basically equivalent to that of the road asphalt pavement in China at present, the damage strain of a comparative test is far smaller than that of the embodiments 1-3 of the preparation method, and meanwhile, the deformation of the pavement structure prepared by the method can reach +/-3.5 cm at most and is far higher than the existing maximum deformation +/-2.5 at present, so that the preparation method has a spanning significance for improving the reflection crack diseases of the steel bridge pavement structure.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a structure of mating formation is mated formation in flexible concatenation which characterized in that: the structure is a combined structure, a concrete slab (2) with a deformation joint (1) is arranged in a formed notch, a notch steel plate (5) is arranged above the concrete slab (2) and corresponds to the position of the deformation joint (1), a lower layer of large-deformation high-elasticity asphalt mixture (3) is paved on the upper surface of the concrete slab (2), and an upper layer of anti-rutting high-elasticity asphalt mixture (4) is paved on the upper surface of the lower layer of large-deformation high-elasticity asphalt mixture (3);
the notch steel plate (5) forms a bulge towards the direction of the lower-layer large-deformation high-elasticity asphalt mixture (3) at the position corresponding to the deformation joint (1).
2. The flexible splice paving structure of claim 1, wherein: the lower-layer large-deformation high-elasticity asphalt mixture (3) is composed of polymer modified asphalt and basalt aggregate with single particle size, and the mass ratio of the polymer modified asphalt to the basalt aggregate is 30-40: 100, respectively; the polymer modified asphalt comprises the following components: 100 parts of matrix asphalt, 15-25 parts of 80-250 nm nano-scale rubber powder, 10-15 parts of 0.5-1 cm rubber particles, 2-5 parts of an activating agent, 1-2.5 parts of an epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fibers and 6-10 parts of a composite synergist; the basalt aggregate with the single particle size is one of 5-10 mm, 10-13 mm and 13-20 mm in particle size.
3. The flexible splice paving structure of claim 1 or 2, wherein: the upper-layer anti-rutting high-elasticity asphalt mixture (4) is composed of polymer modified asphalt and continuous open-graded basalt aggregate, and the mass ratio of the polymer modified asphalt to the continuous open-graded basalt aggregate is 15-25: 100, respectively; the particle size of the continuous open-graded basalt aggregate is one of 5-13 mm, 5-20 mm and 10-20 mm.
4. The flexible splice paving structure of claim 1, wherein: the notch steel plate (5) is formed into any one of a trapezoid without a base, a square without a base, a rectangle without a base, an arc and a triangle without a base, wherein the shape of the bulge towards the direction of the lower layer large-deformation high-elasticity asphalt mixture (3) is trapezoid without a base.
5. The flexible splicing paving structure as claimed in any one of claims 1 to 4, wherein: the utility model discloses a notch anchor rod, including notch, anchor rod (7) and upper anchor rod (7 b), the setting of anchor rod (7 a) is being close to notch bottom surface position down, and upper anchor rod (7 b) sets up to be close to notch top surface position on the two inside walls of notch symmetry respectively for increase and the fastness of connection site.
6. The flexible splice paving structure of claim 5, wherein: a spring pull rod (9) is arranged between the two inner side walls of the notch, and two ends of the spring pull rod (9) are respectively fixed with the inner side walls of the notch.
7. The flexible splice paving structure of claim 6, wherein: and interface adhesives (6) are arranged on the surfaces of the bottom surfaces of the two inner side walls of the notch.
8. The construction method of the flexible splicing paving structure is characterized by comprising the following steps: comprises the following operation steps of the following steps of,
s1, cutting off an original pavement structure above a deformation joint (1) to display the deformation joint (1) between the surface of a concrete slab (2) and the plates to form a notch;
s2, paving and fixing a notch steel plate (5) right above the deformation joint (1) between the concrete plates (2);
s3, filling the lower layer large-deformation high-elasticity asphalt mixture (3) and tamping;
and S4, filling the upper-layer anti-rutting high-elasticity asphalt mixture (4), and tamping to form a flexible splicing paving structure.
9. The construction method of the flexible splicing paving structure as claimed in claim 8, wherein: s3 before filling high-elastic asphalt mixture (3) of lower floor's large deformation anchor rod (7) of being provided with of difference symmetry on two inside walls of notch, anchor rod (7) are including anchor rod (7 a) and last anchor rod (7 b) down, anchor rod (7 a) set up and are being close to notch bottom surface position down, it sets up and is being close to notch top surface position to go up anchor rod (7 b), the at least one end of anchor rod (7 a) and last anchor rod (7 b) sets up to the anchor structure down for increase with the fastness of connection site.
10. The construction method of the flexible splicing paving structure as claimed in claim 8 or 9, wherein:
a spring pull rod (9) is arranged between the two inner side walls of the notch, and two ends of the spring pull rod (9) are respectively fixed with the inner side walls of the notch.
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| WO2024077719A1 (en) * | 2022-10-09 | 2024-04-18 | 江苏中路工程技术研究院有限公司 | Deformation joint expansion/contraction device, pavement structure and construction method therefor |
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