CN112211070B - Preventive maintenance construction method for asphalt pavement with composite interlayer overlay structure - Google Patents
Preventive maintenance construction method for asphalt pavement with composite interlayer overlay structure Download PDFInfo
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- CN112211070B CN112211070B CN202011015993.1A CN202011015993A CN112211070B CN 112211070 B CN112211070 B CN 112211070B CN 202011015993 A CN202011015993 A CN 202011015993A CN 112211070 B CN112211070 B CN 112211070B
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/21—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for simultaneously but separately applying liquid material and granular or pulverulent material, e.g. bitumen and grit, with or without spreading ; for filling grooves and gritting the filling
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Abstract
The application relates to a preventive maintenance construction method for a composite interlayer overlay structure bituminous pavement, which comprises the following steps: s1, construction preparation; s2, cleaning and paying off the road surface; s3, spreading and paving; s4, forming and maintaining; and S5, rolling construction. The material removing possibility of the pavement structure can be reduced.
Description
Technical Field
The application relates to the technical field of asphalt pavements, in particular to a preventive maintenance construction method for an asphalt pavement with a composite interlayer cover surface structure.
Background
With the rapid development of road construction in China, the work focus of road construction units is gradually changed from 'large-scale construction' to 'construction and maintenance synchronization', and at present, the road construction units basically accept the view of road preventive maintenance technology.
In the related art, reference can be made to a Chinese utility model with an authorization publication number of CN202380382U, which discloses a synchronous chip sealer, comprising an automobile chassis and an auxiliary frame arranged on the automobile chassis, wherein the auxiliary frame is provided with a power separation device, an asphalt tank assembly, a stone tank assembly and an electric control system, and the power separation device is directly connected with the automobile chassis; the stone box assembly is positioned at the rear part of the auxiliary frame and comprises a stone box body, a stone spreading mechanism, an asphalt spreading mechanism, a material guide device and a fixed seat; the building stones box is located sub vehicle frame, building stones spreading mechanism is located building stones box rear lower place, the pitch spills the rear lower place that the mechanism is located the building stones box.
The existing road preventive maintenance technology adopts the traditional maintenance technologies such as fog seal technology, Novachip technology, micro surfacing technology chip seal technology and the like to improve the service performance of the road surface, and the functional layers have the characteristics of skid resistance, water seepage resistance, wear resistance and the like.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the traditional preventive maintenance technology can cause the problem of material removal of the pavement structure, and the use quality is seriously influenced.
Disclosure of Invention
In order to reduce the possibility of stripping of a pavement structure, the application provides a preventive maintenance construction method for the asphalt pavement with the composite interlayer cover structure.
The application provides a preventive maintenance construction method for asphalt pavement with a composite interlayer overlay structure, which adopts the following technical scheme:
a preventive maintenance construction method for asphalt pavement with a composite interlayer overlay structure comprises the following steps:
s1, construction preparation: firstly, prefabricating coarse aggregates, fine aggregates and modified emulsified asphalt raw materials; then checking the measuring tool;
s2, pavement cleaning and paying off: firstly, before construction, a constructor drives a sweeper to sweep an original road surface to remove impurities and visible water on the road surface; secondly, after the original pavement is cleaned, marks are arranged along the center line of the pavement and a quarter of the width of the pavement, and a construction range and a trend control line are marked;
s3, spreading and paving: driving a synchronous chip sealer vehicle filled with various raw materials to a construction starting point, aligning to a trend control line, coordinating the road condition by a field responsible person through an interphone, and informing an operator of the synchronous chip sealer vehicle to sequentially spread according to an interlayer interface agent layer, a modified emulsified asphalt layer, a thick aggregate layer, a thin aggregate layer, a modified emulsified asphalt layer and a surface protective agent layer after the road condition is coordinated, and simultaneously maintaining traffic and forbidding pedestrians to pass; in the process of spreading raw materials, arranging constructors to follow a synchronous chip sealer to conveniently carry out manual trimming on defective places;
s4, forming and maintaining: continuously maintaining for 1-2h after demulsification and molding of the modified emulsified asphalt to further dissipate the water in the mixture; detecting the water content in the pavement in time in the maintenance process, and performing next rolling construction when the water content of the pavement is reduced to be below 2%;
s5, rolling construction: and rolling the road surface structure by the rubber-tyred road roller back and forth for 6-8 times, and spraying water to the tires in the rolling process of the rubber-tyred road roller so as to reduce the phenomenon that the tires are stuck.
By adopting the technical scheme, the pavement structure layer adopts a sandwich structure of modified emulsified asphalt-coarse aggregate-fine aggregate-modified emulsified asphalt, the upper and lower aggregates in the sandwich layer form a certain embedding and extruding structure, the contact area between a tire and a pavement is increased, the skid resistance is high, an interlayer interface agent layer and a surface protective agent layer are added, the quality of the pavement structure is ensured, the engineering cost is greatly reduced, and the problems of material removal and oil bleeding in the traditional maintenance construction are solved.
Preferably, in step S2, in order to prevent the marked line from being contaminated during the spraying of the emulsified asphalt, the marked line is sealed with a transparent adhesive tape having a corresponding width.
By adopting the technical scheme, the marking can be effectively prevented from being polluted.
Preferably, in step S3, the synchronous chip sealer includes a chassis and a sub-frame, and the sub-frame is provided with a power separation device, an asphalt tank assembly, a stone box assembly and an electrical control system; the stone box assembly comprises a stone box body, stone spreading mechanisms and two groups of asphalt spreading mechanisms; the auxiliary frame is provided with an interlayer interface agent box and a surface protective agent box, an interlayer interface agent spreading mechanism and a surface protective agent spreading mechanism are arranged at the rear lower part of the auxiliary frame, and the structures of the interlayer interface agent spreading mechanism and the surface protective agent spreading mechanism are the same as those of the asphalt spreading mechanism; the interlayer interface agent spreading mechanism, the asphalt spreading mechanism, the stone spreading mechanism, the other asphalt spreading mechanism and the surface protective agent spreading mechanism are sequentially arranged from one end to the other end of the auxiliary frame.
By adopting the technical scheme, the interlayer interface agent layer, the modified emulsified asphalt layer, the coarse and fine aggregate layer, the modified emulsified asphalt layer and the surface protective agent layer are conveniently and sequentially paved.
Preferably, a material guide device is arranged in the stone box body and comprises a horizontal shaft which is rotatably connected to the bottom of the inner cavity of the stone box body, a material guide plate which is arranged in an upward inclined mode is fixedly connected to the horizontal shaft, and a reset assembly for driving the horizontal shaft to reset is mounted on the horizontal shaft; a through hole is formed in one side, away from the horizontal shaft, of the stone box body, a horizontal plate is connected in the through hole in a sliding mode along the vertical direction, the horizontal plate is fixedly connected to one end, away from the horizontal shaft, of the material guide plate, an elastic plate is fixedly connected to the top of the horizontal plate, and one end, away from the horizontal plate, of the elastic plate is fixedly connected to the top wall of the through hole; and a plurality of groups of buffer assemblies used for buffering the horizontal plate are arranged at the bottom of the through hole.
By adopting the technical scheme, the material guide plate is arranged, so that the stone material can be conveniently guided; the elastic plate is arranged, so that the possibility of stone leaking from the through hole can be reduced; through setting up buffering subassembly and reset assembly, be convenient for cushion the stock guide to can reduce the broken possibility of building stones emergence.
Preferably, two opposite inner sides of the stone box body are respectively provided with a mounting groove, and two ends of the horizontal shaft are respectively and rotatably connected to the side walls of the two mounting grooves; the reset assembly comprises two torsional springs, wherein the opposite ends of the two torsional springs are fixedly connected to the side wall of the horizontal shaft, and the two ends of the two torsional springs, which are far away from each other, are fixedly connected to the two ends of the mounting groove, which are far away from each other.
By adopting the technical scheme, on one hand, the guide plate is convenient to buffer through the torsion spring, so that the possibility of crushing stone materials can be reduced; on the other hand, when the stones on the material guide plate are less, the horizontal shaft drives the material guide plate to rotate upwards under the action of the torsion spring, so that the stones can flow out of the stone box body conveniently.
Preferably, every group the buffering subassembly includes the buffering post, the spout that is used for supplying the buffering post to follow vertical slip is offered to the bottom of through-hole, the top rigid coupling of buffering post has the buffer block, the spring has been cup jointed to the lateral wall of buffering post, the one end rigid coupling of spring in the bottom of buffer block, other end rigid coupling in the bottom of through-hole.
Through adopting above-mentioned technical scheme, through setting up the spring, be convenient for cushion the horizontal plate to can reduce the broken possibility of building stones emergence.
Preferably, the outer side wall of the stone box body is provided with a plurality of groups of pressing assemblies, and each group of pressing assemblies comprises an air cylinder vertically arranged on the outer side wall of the stone box body and a pressing block fixedly connected to a piston rod of the air cylinder; the bottom of the pressing block can abut against the top of the horizontal plate.
By adopting the technical scheme, when the stone on the material guide plate is inconvenient to fall, the piston rod of the air cylinder drives the pressing block to move downwards, the pressing block moves downwards to drive the horizontal plate to move downwards, and at the moment, the torsion spring is in a compressed state; after the piston rod of the cylinder drives the pressing block to reset, the guide plate can vibrate under the action of the torsion spring, so that stone falls conveniently.
Preferably, the elastic panel is a flap.
Through adopting above-mentioned technical scheme, through setting up the folded plate, be convenient for shelter from the through-hole.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the road surface structure layer adopts a sandwich structure of modified emulsified asphalt, coarse aggregate, fine aggregate and modified emulsified asphalt, the upper and lower aggregates in the sandwich layer form a certain embedding and extruding structure, the contact area between a tire and the road surface is increased, the skid resistance is high, an interlayer interface agent layer and a surface protective agent layer are added, the quality of the road surface structure is ensured, the construction cost is greatly reduced, and the problems of material removal and oil bleeding of the traditional maintenance construction are solved;
2. the material guide plate is arranged, so that the stone material can be conveniently guided; the elastic plate is arranged, so that the possibility of stone leaking from the through hole can be reduced; the buffering assembly and the resetting assembly are arranged, so that the material guide plate is conveniently buffered, and the possibility of crushing stone materials can be reduced;
3. on one hand, the material guide plate is convenient to buffer through the torsion spring, so that the possibility of crushing stone materials can be reduced; on the other hand, when the stones on the material guide plate are less, the horizontal shaft drives the material guide plate to rotate upwards under the action of the torsion spring, so that the stones can flow out of the stone box body conveniently.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a partial cross-sectional view of a highlighted reduction assembly in an embodiment of the application;
FIG. 3 is a schematic structural diagram of a salient buffering component and a pressing component in the embodiment of the present application.
Description of reference numerals: 10. an automotive chassis; 11. an auxiliary frame; 12. a stone box body; 121. mounting grooves; 122. a through hole; 123. a chute; 13. a stone spreading mechanism; 14. an asphalt distribution mechanism; 15. an interlayer interface agent box; 16. a surface protectant box; 17. an interfacial agent spreading mechanism; 18. a surface protective agent spreading mechanism; 2. a material guiding device; 21. a horizontal axis; 22. a material guide plate; 23. a horizontal plate; 24. an elastic plate; 3. a reset assembly; 31. a torsion spring; 4. a buffer assembly; 41. a buffer column; 42. a buffer block; 43. a spring; 5. a pressing assembly; 51. a cylinder; 52. and pressing the block.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a preventive maintenance construction method for asphalt pavement with a composite interlayer overlay structure, which comprises the following steps:
s1, construction preparation: firstly, prefabricating coarse aggregates, fine aggregates and modified emulsified asphalt raw materials; then checking the measuring tool;
s2, pavement cleaning and paying off: firstly, before construction, a constructor drives a sweeper to sweep an original road surface to remove impurities and visible water on the road surface; secondly, after the original pavement is cleaned, marks are arranged along the center line of the pavement and a quarter of the width of the pavement, and a construction range and a trend control line are marked; in order to prevent the marked lines from being polluted in the process of spraying the emulsified asphalt, transparent adhesive tapes with corresponding widths are adopted to seal the marked lines;
s3, spreading and paving: driving a synchronous chip sealer vehicle filled with various raw materials to a construction starting point, aligning to a trend control line, coordinating the road condition by a field responsible person through an interphone, and informing an operator of the synchronous chip sealer vehicle to sequentially spread according to an interlayer interface agent layer, a modified emulsified asphalt layer, a thick aggregate layer, a thin aggregate layer, a modified emulsified asphalt layer and a surface protective agent layer after the road condition is coordinated, and simultaneously maintaining traffic and forbidding pedestrians to pass; in the process of spreading raw materials, arranging constructors to follow a synchronous chip sealer to conveniently carry out manual trimming on defective places;
s4, forming and maintaining: continuously maintaining for 1-2h after demulsification and molding of the modified emulsified asphalt to further dissipate the water in the mixture; detecting the water content in the pavement in time in the maintenance process, and performing next rolling construction when the water content of the pavement is reduced to be below 2%;
s5, rolling construction: and rolling the road surface structure by the rubber-tyred road roller back and forth for 6-8 times, and spraying water to the tires in the rolling process of the rubber-tyred road roller so as to reduce the phenomenon that the tires are stuck.
The road surface structure layer adopts a sandwich structure of modified emulsified asphalt, coarse aggregate, fine aggregate and modified emulsified asphalt, the upper and lower aggregates in the sandwich layer form a certain embedding and extruding structure, the contact area between a tire and the road surface is increased, the skid resistance is high, an interlayer interface agent layer and a surface protective agent layer are added, the quality of the road surface structure is ensured, the engineering cost is greatly reduced, and the problems of material removal and oil bleeding in the traditional maintenance construction are solved.
As shown in fig. 1 and 2, in step S3, the synchonous rock sealing vehicle includes a vehicle chassis 10 and a subframe 11, and the subframe 11 is mounted with a power separation device, an asphalt tank assembly, a stone box assembly and an electrical control system.
As shown in fig. 1 and 2, the stone box assembly includes a stone box 12 mounted on a sub frame 11, a stone spreading mechanism 13, and two sets of asphalt spreading mechanisms 14; the asphalt distribution mechanism 14 comprises a pump body and a distribution pipeline, and the pump body is communicated with the asphalt tank assembly through the pipeline; an interlayer interface agent box 15 and a surface protective agent box 16 are installed on the auxiliary frame 11, an interlayer interface agent spreading mechanism 17 and a surface protective agent spreading mechanism 18 are installed at the rear lower part of the auxiliary frame 11, and the structures of the interlayer interface agent spreading mechanism 17 and the surface protective agent spreading mechanism 18 are the same as the structure of the asphalt spreading mechanism 14; the pump body of the interlayer interface agent spreading mechanism 17 is communicated with the interlayer interface agent box 15 through a pipeline, and the pump body of the surface protective agent spreading mechanism 18 is communicated with the surface protective agent box 16 through a pipeline; the interlayer interface agent spreading mechanism 17, an asphalt spreading mechanism 14, a stone spreading mechanism 13, another asphalt spreading mechanism 14 and a surface protective agent spreading mechanism 18 are sequentially arranged from one end close to the locomotive to one end far away from the locomotive along the auxiliary frame 11.
As shown in fig. 2 and 3, a material guide device 2 is installed in the stone box 12, the material guide device 2 includes a horizontal shaft 21, the left and right inner sides of the stone box 12 are respectively provided with an installation groove 121, and both ends of the horizontal shaft 21 are respectively rotatably connected to the side walls of the two installation grooves 121 through bearings; a material guide plate 22 which is arranged in an upward inclined manner is fixedly connected to the horizontal shaft 21, and a reset component 3 for driving the horizontal shaft 21 to reset is arranged on the horizontal shaft 21; a through hole 122 is formed in one side, away from the horizontal shaft 21, of the stone box 12, the through hole 122 is square, a horizontal plate 23 is connected in the through hole 122 in a sliding manner in the vertical direction, one side, close to the horizontal shaft 21, of the horizontal plate 23 is fixedly connected to one end, away from the horizontal shaft 21, of the material guide plate 22, the top of the horizontal plate 23 is fixedly connected with an elastic plate 24, the elastic plate 24 is a folded plate which can be made of spring steel, and one end, away from the horizontal plate 23, of the elastic plate 24 is fixedly connected to the top wall of the through hole 122; the bottom of the through hole 122 is mounted with a plurality of sets of buffer assemblies 4 for buffering the horizontal plate 23. The material guide plate 22 is arranged, so that the material guide of stone materials is facilitated; by providing the elastic plate 24, the possibility of stone leaking from the through hole 122 can be reduced; the buffering assembly 4 and the resetting assembly 3 are arranged, so that the guide plate 22 is conveniently buffered, and the possibility of stone crushing can be reduced.
As shown in fig. 2 and fig. 3, the reset assembly 3 includes two torsion springs 31 sleeved on the side wall of the horizontal shaft 21, opposite ends of the two torsion springs 31 are all fixedly connected to the side wall of the horizontal shaft 21, and ends of the two torsion springs 31 far away from each other are respectively fixedly connected to ends of the two mounting grooves 121 far away from each other. On one hand, the guide plate 22 is convenient to buffer through the torsion spring 31, so that the possibility of stone crushing can be reduced; on the other hand, when the quantity of stone material on the guide plate 22 is small, the horizontal shaft 21 drives the guide plate 22 to rotate upward under the action of the torsion spring 31, thereby facilitating the flow of stone material out of the stone material box 12.
As shown in fig. 2 and 3, each set of buffer assemblies 4 includes a buffer column 41, a sliding groove 123 for the buffer column 41 to slide vertically is formed at the bottom of the through hole 122, and the sliding groove 123 is cylindrical; the top rigid coupling of bumping post 41 has bumping block 42, and bumping block 42 can be made by the spring steel, and bumping block 42 is discoid, and spring 43 has been cup jointed to the lateral wall of bumping post 41, and the one end rigid coupling of spring 43 is in the bottom of bumping block 42, and the other end rigid coupling is in the bottom of through-hole 122. By providing the spring 43, the horizontal plate 23 is easily cushioned, thereby reducing the possibility of stone breakage.
As shown in fig. 2 and 3, a plurality of sets of pressing assemblies 5 are mounted on the outer side wall of the stone box 12, each set of pressing assemblies 5 is disposed near the through hole 122, and each set of pressing assemblies 5 includes a cylinder 51 and a pressing block 52; the cylinder 51 is vertically arranged on the outer side wall of the stone box 12, a piston rod of the cylinder 51 is vertically and downwards fixedly connected with the top of the pressing block 52, and a protective layer can be arranged at one end of the pressing block 52 far away from the cylinder 51 so as to reduce the rigid contact between the pressing block 52 and the horizontal plate 23; the bottom of the pressing block 52 can abut against the top of the horizontal plate 23. When the stone material on the material guide plate 22 does not fall conveniently, the piston rod of the air cylinder 51 drives the pressing block 52 to move downwards, the pressing block 52 moves downwards to drive the horizontal plate 23 to move downwards, and the torsion spring 31 is in a compressed state; when the piston rod of the cylinder 51 drives the pressing block 52 to return, the guide plate 22 can vibrate under the action of the torsion spring 31, so that the stone can fall conveniently.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A preventive maintenance construction method for asphalt pavement with a composite interlayer overlay structure is characterized by comprising the following steps of: the method comprises the following steps:
s1, construction preparation: firstly, prefabricating coarse aggregates, fine aggregates and modified emulsified asphalt raw materials; then checking the measuring tool;
s2, pavement cleaning and paying off: firstly, before construction, a constructor drives a sweeper to sweep an original road surface to remove impurities and visible water on the road surface; secondly, after the original pavement is cleaned, marks are arranged along the center line of the pavement and a quarter of the width of the pavement, and a construction range and a trend control line are marked;
s3, spreading and paving: driving a synchronous chip sealer vehicle filled with various raw materials to a construction starting point, aligning to a trend control line, coordinating the road condition by a field responsible person through an interphone, and informing an operator of the synchronous chip sealer vehicle to sequentially spread according to an interlayer interface agent layer, a modified emulsified asphalt layer, a thick aggregate layer, a thin aggregate layer, a modified emulsified asphalt layer and a surface protective agent layer after the road condition is coordinated, and simultaneously maintaining traffic and forbidding pedestrians to pass; in the process of spreading raw materials, arranging constructors to follow a synchronous chip sealer to conveniently carry out manual trimming on defective places; the synchronous chip sealer comprises an automobile chassis (10) and an auxiliary frame (11), wherein a power separation device, an asphalt tank assembly, a stone box assembly and an electric control system are arranged on the auxiliary frame (11); the stone box assembly comprises a stone box body (12), stone spreading mechanisms (13) and two groups of asphalt spreading mechanisms (14); an interlayer interface agent box (15) and a surface protective agent box (16) are installed on the auxiliary frame (11), an interlayer interface agent spreading mechanism (17) and a surface protective agent spreading mechanism (18) are installed at the rear lower part of the auxiliary frame (11), and the structures of the interlayer interface agent spreading mechanism (17) and the surface protective agent spreading mechanism (18) are the same as those of the asphalt spreading mechanism (14); the interlayer interface agent spreading mechanism (17), an asphalt spreading mechanism (14), a stone spreading mechanism (13), another asphalt spreading mechanism (14) and a surface protective agent spreading mechanism (18) are sequentially arranged from one end to the other end of the auxiliary frame (11);
the stone box body (12) is internally provided with a material guide device (2), the material guide device (2) comprises a horizontal shaft (21) which is rotatably connected to the bottom of an inner cavity of the stone box body (12), a material guide plate (22) which is arranged in an upward inclined manner is fixedly connected to the horizontal shaft (21), and a reset assembly (3) which is used for driving the horizontal shaft (21) to reset is installed on the horizontal shaft (21); a through hole (122) is formed in one side, away from the horizontal shaft (21), of the stone box body (12), a horizontal plate (23) is connected in the through hole (122) in a sliding mode along the vertical direction, the horizontal plate (23) is fixedly connected to one end, away from the horizontal shaft (21), of the material guide plate (22), the top of the horizontal plate (23) is fixedly connected with an elastic plate (24), and one end, away from the horizontal plate (23), of the elastic plate (24) is fixedly connected to the top wall of the through hole (122); a plurality of groups of buffer assemblies (4) used for buffering the horizontal plate (23) are mounted at the bottom of the through hole (122);
s4, forming and maintaining: continuously maintaining for 1-2h after demulsification and molding of the modified emulsified asphalt to further dissipate the water in the mixture; detecting the water content in the pavement in time in the maintenance process, and performing next rolling construction when the water content of the pavement is reduced to be below 2%;
s5, rolling construction: and rolling the road surface structure by the rubber-tyred road roller back and forth for 6-8 times, and spraying water to the tires in the rolling process of the rubber-tyred road roller so as to reduce the phenomenon that the tires are stuck.
2. The preventive maintenance construction method for asphalt pavement with composite sandwich overlay structure according to claim 1, characterized in that: in step S2, in order to prevent the mark line from being contaminated during the spraying of the emulsified asphalt, the mark line is sealed with a transparent adhesive tape having a corresponding width.
3. The preventive maintenance construction method for asphalt pavement with composite sandwich overlay structure according to claim 1, characterized in that: two opposite inner sides of the stone box body (12) are respectively provided with a mounting groove (121), and two ends of the horizontal shaft (21) are respectively and rotatably connected to the side walls of the two mounting grooves (121); reset assembly (3) include two torsional springs (31), two the equal rigid coupling in the lateral wall of horizontal axis (21) in the looks remote end of torsional spring (31), two the end of keeping away from each other of torsional spring (31) respectively the rigid coupling in two the end of keeping away from each other of mounting groove (121).
4. The preventive maintenance construction method for asphalt pavement with composite sandwich overlay structure according to claim 1, characterized in that: every group buffering subassembly (4) are including buffering post (41), spout (123) that are used for supplying buffering post (41) to follow vertical slip are offered to the bottom of through-hole (122), the top rigid coupling of buffering post (41) has buffer block (42), spring (43) have been cup jointed to the lateral wall of buffering post (41), the one end rigid coupling of spring (43) is in the bottom of buffer block (42), and the other end rigid coupling is in the bottom of through-hole (122).
5. The preventive maintenance construction method for asphalt pavement with composite sandwich overlay structure according to claim 1, characterized in that: a plurality of groups of pressing assemblies (5) are mounted on the outer side wall of the stone box body (12), and each group of pressing assemblies (5) comprises a cylinder (51) vertically mounted on the outer side wall of the stone box body (12) and a pressing block (52) fixedly connected to a piston rod of the cylinder (51); the bottom of the pressing block (52) can be abutted against the top of the horizontal plate (23).
6. The preventive maintenance construction method for asphalt pavement with composite sandwich overlay structure according to claim 1, characterized in that: the elastic plate (24) is a folded plate.
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| FR2840331A1 (en) * | 2002-05-28 | 2003-12-05 | Secmair | Device for spreading ballast on roadway comprises mobile chassis supporting tipping skip containing ballast, buffer tray inserted between skip outlet and ballast distribution means |
| CN202380382U (en) * | 2011-12-28 | 2012-08-15 | 山东建设机械股份有限公司 | Synchronous chip sealer |
| CN205399148U (en) * | 2016-02-20 | 2016-07-27 | 河南高远公路养护设备股份有限公司 | It spills cloth car to contain sand fog seal |
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