CN114960337A - Three-dimensional net pad for repairing pavement pit slot - Google Patents
Three-dimensional net pad for repairing pavement pit slot Download PDFInfo
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- CN114960337A CN114960337A CN202210576964.5A CN202210576964A CN114960337A CN 114960337 A CN114960337 A CN 114960337A CN 202210576964 A CN202210576964 A CN 202210576964A CN 114960337 A CN114960337 A CN 114960337A
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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
- E01C11/005—Methods or materials for repairing pavings
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Abstract
The invention discloses a three-dimensional net pad for repairing a pavement pit slot, which comprises two-dimensional plane grids and three-dimensional nodes; the two-dimensional plane grid comprises plane grid lines, plane grid circular nodes and plane grid meshes; a plurality of regularly arranged plane grid lines are connected with each other to form a plane structure; the intersection points of the plane grid lines are provided with plane grid circular nodes, and the gaps form plane grid meshes; meshes of all the plane grids in the two-dimensional plane grid are completely the same; the center of the circular node of the plane grid is provided with a vertically through nail hole which is used for matching with a nail for pavement engineering; the three-dimensional node is a three-dimensional structure with a circular bottom surface; the center of the three-dimensional node is provided with a vertically through nail hole which is used for matching with a nail for pavement engineering. The three-dimensional net cushion respectively provides two-dimensional and three-dimensional lateral constraints for the patching material, generates an interlocking effect, limits the movement of the patching material, improves the stability of the mixture at a junction surface and the adhesive force of a contact surface, and prolongs the service life of a flexible pavement.
Description
Technical Field
The invention relates to the field of highway maintenance, in particular to a three-dimensional net pad for repairing a pit slot on a road surface.
Background
The asphalt concrete pavement is a high-grade flexible pavement and has the characteristics of smooth pavement, comfortable driving and the like. However, due to the factors such as the increase of traffic load and the quality of pavement construction, the pavement is prone to have defects such as pits and cracks in the early stage, and some defects are even further worsened. The pit slot is a common disease which is easy to be frequently generated on the asphalt concrete pavement, has a larger proportion of the road surface diseases, and particularly is a concave structure formed after aggregate on the asphalt pavement is stripped due to water damage and the like. The occurrence of the pits has contingency, and if the pits are not maintained in time, large-area pits can also appear on peripheral road sections under the expansion of vehicle loads, so that the driving comfort and safety are seriously influenced, and even the pavement base layer can be further damaged.
At present, the commonly used pit repairing methods comprise filling repairing and patching repairing, and no matter a repairing material adopts a hot material or a cold material, the bonding force of a contact surface between a new asphalt mixture and an old asphalt mixture is a key for influencing the repairing quality and the service life. In order to improve the contact bonding force between the repair block and the wall surface of the pit groove, a method for improving the bonding force of a joint by coating adhesive layer oil, heating the joint, chamfering the side wall in a plain manner and the like is provided in engineering. However, the bonded state of the repaired joint cannot maintain a long service life due to the depth of the pit and the construction technique. For example, the contact adhesion provided by using the adhesive layer oil alone is limited, and special attention is needed to be paid during coating so as not to generate oil accumulation on the bottom and the peripheral side wall of the pit groove, otherwise, the adhesion is reduced; the heating joint is limited by heating equipment when the depth of the pit is deep, and the heating joint is easy to heat unevenly at the bottom of the pit, so that the bonding force is influenced; tapering the sidewalls reduces the compaction of the bottom of the packing. The methods increase the construction difficulty and cost, improve the cohesive force of the contact surface to a limited extent, and the repair quality is easily influenced by factors such as load, climate and the like. Practice proves that the service life of the repairing block is short, the adhesive force of the contact surface of the new asphalt mixture and the old asphalt mixture is unstable, and secondary diseases are easily generated under the action of external factors such as driving load, precipitation and the like in the traditional asphalt pavement pit repairing method.
Therefore, the method of only singly adopting the adhesive layer oil or the thermal joint to improve the bonding force of the seam of the repair block is difficult to maintain for a long service life, and the bonding force provided by the contact surface is unstable and is easily influenced by factors such as load, water accumulation and the like. In order to prolong the service life of the repairing block, a new structure is required to be arranged at the contact surface of the old asphalt and the new asphalt in the pit slot in engineering to bite the repairing material and the old road material together and restrain the relative displacement of the repairing material and the old road material under load, so that the adhesive force of the contact surface is improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing a three-dimensional mesh pad for repairing a pavement pit.
The technical scheme for solving the technical problem is to provide a three-dimensional mesh pad for repairing a pavement pit slot, which is characterized by comprising two-dimensional plane grids and three-dimensional nodes;
the two-dimensional plane grid comprises plane grid lines, plane grid circular nodes and plane grid meshes; a plurality of regularly arranged plane grid lines are connected with each other to form a plane structure; the intersection points of the plane grid lines are provided with plane grid circular nodes, and the gaps form plane grid meshes; meshes of all the plane grids in the two-dimensional plane grid are completely the same; the center of the circular node of the plane grid is provided with a vertically through nail hole which is used for matching with a nail for pavement engineering;
the three-dimensional node is a three-dimensional structure with a round bottom surface; the diameter of the circular bottom surface is the same as that of the circular nodes of the planar grid; a vertically through nail hole is formed in the center of the three-dimensional node and is used for being matched with a nail for pavement engineering;
the two-dimensional plane grid and the three-dimensional nodes are connected into a whole when being manufactured and delivered from a factory, and the three-dimensional nodes are positioned above the circular nodes of the plane grid to form a three-dimensional node integral three-dimensional net pad; or the two-dimensional plane grid and the three-dimensional nodes are respectively molded when being manufactured and delivered out of a factory to form the three-dimensional node separated type three-dimensional net cushion, and the three-dimensional nodes are positioned above the two-dimensional plane grid and fixed by nails for pavement engineering when in use.
Compared with the prior art, the invention has the beneficial effects that:
(1) the three-dimensional mesh pad can respectively provide two-dimensional and three-dimensional lateral restraint for the patching material through the two-dimensional plane grid and the three-dimensional node, an interlocking effect is generated between the grid and the patching material, the movement of the patching material is limited, the stability of the mixture at a junction surface and the adhesive force of a contact surface are improved, and the service life of the flexible pavement is prolonged. When the repair block, especially the joint, is loaded by a vehicle, the net cushion structure can resist the horizontal stress and the bending tensile stress generated by the load, reduce the relative displacement between the material of the repair block and the original pavement, improve the bending tensile and shearing resistance of the repair block, have better repair effect than the cold material cold repair used singly even in the process of quick repair, and adopt the net cushion structure to improve the stability of the repair block no matter the cold repair and hot repair are carried out.
(2) The three-dimensional mesh pad and the repairing material form a reinforced composite structure, and the crack resistance of the repairing block can be improved. And the net pad can form the buffer layer between repair piece and the former road surface layer, and its grid structure can the diffusion stress scope, alleviates the sudden change of stress and avoids stress concentration phenomenon, makes repair structure atress more even, compares in traditional bonding material such as adhesive layer oil, and the net pad has better anti deformability, and road surface life is longer after the secondary is repaired.
(3) The three-dimensional net cushion has the structural characteristics of high tensile strength and low elongation percentage, can enhance the creep resistance of the road surface, keeps the long-term use performance of the road surface, and can effectively increase the deformation resistance of the repairing block at the upper part of the net cushion, thereby greatly prolonging the service life of the repaired road surface and reducing secondary damage in the original repairing technology.
(4) The three-dimensional net cushion forms are designed, so that the three-dimensional net cushion can better adapt to the environments with different depths of pit slots, the three-dimensional net cushion forms can be well attached to the walls of the pit slots when the three-dimensional net cushion forms are laid on the bottom surfaces and the side walls of the pit slots with different depths, filling and compaction of the repairing materials are not affected, the basic cohesive force between new and old mixed materials can be better improved, and stable constraint is provided for the repairing materials.
(5) Compared with novel repair measures such as a bevel repair method, a spray repair method and the like, the three-dimensional mesh pad is more economical, simple in structure and production, low in requirement on construction equipment, less limited by construction conditions, better in cohesiveness, and capable of being combined with a hot repair method and a cold repair method which are widely adopted at present to enhance the stability of a repair material.
Drawings
Fig. 1 is a schematic perspective view of a three-dimensional node integrated three-dimensional mat according to embodiment 1 of the present invention;
FIG. 2 is a schematic top view of a three-dimensional node-integrated three-dimensional mat according to example 1 of the present invention;
fig. 3 is a schematic front view of a three-dimensional node integrated three-dimensional mat according to embodiment 1 of the present invention;
fig. 4 is a schematic perspective view of a two-dimensional plane grid of a three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
FIG. 5 is a schematic top view of a three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
fig. 6 is a schematic front view of a three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
fig. 7 is an installation diagram of the three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
fig. 8 is a schematic view illustrating a next installation of the three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
fig. 9 is a schematic view illustrating a further installation of the three-dimensional node-separated three-dimensional mat according to embodiment 2 of the present invention;
fig. 10 is a perspective view of a vertical net type three-dimensional net pad according to embodiment 3 of the present invention;
fig. 11 is a perspective view of a three-dimensional mesh according to embodiment 3 of the present invention;
FIG. 12 is a perspective view of a three-dimensional node of the present invention;
FIG. 13 is a schematic perspective view of a nail for road construction according to the present invention;
in the figure, a two-dimensional plane grid 1, a plane grid line 11, a plane grid circular node 12 and a plane grid mesh 13; three-dimensional node 2, upper base circle 21, lower base circle 22; the pavement engineering nail 3 and the circular nail cap 31; a nail hole 4; three-dimensional grid 5, spherical three-dimensional grid lines 51, planar connection grid circular nodes 52, three-dimensional grid meshes 53 and planar connection grid lines 54.
Detailed Description
Specific examples of the present invention are given below. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.
The invention provides a three-dimensional mesh pad (three-dimensional mesh pad for short) for repairing a road pit slot, which is characterized by comprising a two-dimensional plane grid 1 and three-dimensional nodes 2;
the two-dimensional plane grid 1 comprises plane grid lines 11, plane grid circular nodes 12 and plane grid meshes 13; a plurality of plane grid lines 11 which are regularly arranged are connected with each other to form a plane structure; the intersection points of the plane grid lines 11 are provided with plane grid circular nodes 12, and the gaps form plane grid meshes 13; all the planar mesh cells 13 in the two-dimensional planar mesh 1 are completely the same; the center of the plane grid circular node 12 is provided with a vertically through nail hole 4 which is used for matching with a nail 3 for pavement engineering; the width and the length of the two-dimensional plane grid 1 are determined according to the actual pit size and the actual depth, and the area of the two-dimensional plane grid 1 is ensured to be enough to be paved on the bottom surface and the side wall of the whole pit during construction.
The three-dimensional node 2 is a three-dimensional structure with a circular bottom surface; the diameter of the circular bottom surface is the same as that of the circular nodes 12 of the planar grid, the bottom surface of the three-dimensional node 2 is tightly attached to the circular nodes 12 of the planar grid, and the two-dimensional planar grid 1 is fixed while the grinding repair material is not influenced; a vertically through nail hole 4 is formed in the center of the three-dimensional node 2 and is used for being matched with a road surface engineering nail 3;
the two-dimensional plane grid 1 and the three-dimensional nodes 2 are connected into a whole when being manufactured and delivered from a factory, and the three-dimensional nodes 2 are positioned above the circular nodes 12 of the plane grid to form a three-dimensional node integrated three-dimensional net pad; or the two-dimensional plane grid 1 and the three-dimensional nodes 2 are respectively molded when being manufactured and delivered out of a factory to form a three-dimensional node separated type three-dimensional net cushion, and the three-dimensional nodes 2 are placed above the circular nodes 12 of the plane grid and are fixed through the nails 3 for pavement engineering during construction.
Preferably, the three-dimensional node integral type three-dimensional net cushion is tightly connected with the two-dimensional plane grid 1, so that the three-dimensional node 2 and the two-dimensional plane grid are integrally stressed to jointly restrain relative displacement between new materials and old materials at a pit and groove interface under traffic load. The three-dimensional node separated three-dimensional mesh mat can enable the two-dimensional plane mesh 1 to be better attached to the wall surface (the side wall and the bottom surface of the pit) of the pit, so that the two-dimensional plane mesh 1 and the pit can be more closely connected, the compactness of the repair material can be improved to a certain extent when the side wall is laid, and the contact adhesive force of new and old materials can be better improved by the two-dimensional plane mesh 1.
Preferably, the planar grid lines 11 can be in a strip shape or a round strip shape, and in order not to influence the contact area between the repair material and the pavement raw material, the width, the thickness or the diameter is 1-5 mm; the diameter of the planar mesh circular nodes 12 is greater than the width or diameter of the planar mesh lines 11.
Preferably, the side length of all the edges of each plane mesh 13 is 10-50 mm, so that the size of each plane mesh 13 is not less than 2-3 times of the size of the largest crushed stone in the repair material, and the largest crushed stone in the repair material can pass through and be rolled conveniently.
Preferably, the shape of the planar mesh cells 13 may take the form of regular polygons such as regular polygons, rectangles, isosceles triangles, isosceles right triangles, parallelograms, preferably squares and isosceles right triangles.
Preferably, the three-dimensional node 2 is a cylinder or a circular truncated cone to form a three-dimensional cylinder node or a three-dimensional circular truncated cone node; the diameter of the upper bottom circle 21 is d1, the diameter of the lower bottom circle 22 is d2, d1 is not less than d2 (preferably d1 is not less than d2 is not less than d1+2 mm); the height of the three-dimensional node 2 is h1, and h1 is d 2. In the present embodiment, d1 is 8 to 10 mm.
Preferably, the size of the nail hole 4 at the center of the planar mesh circular node 12 is the same as the size of the nail hole 4 at the center of the three-dimensional node 2.
Preferably, the three-dimensional node-separated three-dimensional mesh pad further comprises a three-dimensional stereoscopic mesh 5; the three-dimensional stereoscopic mesh 5 comprises a spherical stereoscopic mesh line 51 with a smooth surface and a vertical upward bulge and a plane connecting mesh line 54;
the non-convex ends of the spherical three-dimensional grid lines 51 and the plane connecting grid lines 54 are integrally formed or connected with each other to form a three-dimensional structure; the space of the spherical three-dimensional grid line 51 forms a three-dimensional grid mesh 53; the intersection points of the plane connection grid lines 54 are provided with plane connection grid circular nodes 52; the center of the plane connection grid circular node 52 is provided with a vertically through nail hole 4 which is used for matching with a nail 3 for road surface engineering;
the two-dimensional plane grid 1, the three-dimensional nodes 2 and the three-dimensional grid 5 are respectively molded when being manufactured and delivered from a factory to form a vertical net type three-dimensional net pad; when the three-dimensional node is used, the three-dimensional node 2 is positioned above the plane connection grid circular node 52, the plane connection grid circular node 52 is positioned above the plane grid circular node 12, and the three are fixed by the pavement engineering nail 3.
Preferably, the spherical three-dimensional grid lines 51 can provide lateral restraint for the repair material, so that the repair material on the wall surface of the pit slot is firmly sleeved, and the contact bonding force is improved. Compared with the three-dimensional node integral type three-dimensional mesh pad and the three-dimensional node separated type three-dimensional mesh pad, the vertical mesh type three-dimensional mesh pad can provide better integral lateral constraint for the repair material, so that the interface of the new material and the old material is combined more tightly.
Preferably, the spherical three-dimensional grid lines 51 and the plane connection grid lines 54 are both strip-shaped or round bar-shaped, and the width, the thickness or the diameter are both 1-5 mm; the diameter of the planar connected grid circular nodes 52 is greater than the width or diameter of the planar connected grid lines 54.
Preferably, the side length of all the edges enclosing each three-dimensional mesh 53 is 10 mm-50 mm, so that the size of each three-dimensional mesh 53 is not less than 2-3 times of the size of the largest crushed stone in the repair material, and the largest crushed stone in the repair material can pass through and be rolled conveniently.
The shape of the three-dimensional mesh 53 is preferably a regular polygon such as a quadrangle or a triangle.
Preferably, the spherical surface of the spherical three-dimensional grid line 51 is a spherical surface or an ellipsoid, the height of the protrusions is a semi-sphere or a semi-ellipsoid, and the highest height of the protrusions is higher than the height h1 of the three-dimensional node 2.
Preferably, the planar connected grid circular nodes 52 are located in exactly the same position and size as the planar grid circular nodes 12.
Preferably, the size of the nail hole 4 at the center of the planar connected grid circular node 52 is the same as the size of the nail hole 4 at the center of the three-dimensional node 2.
Preferably, the pavement engineering nail 3 is a cement nail or a rivet, and the specific size is subject to the construction requirement. The diameter of the pavement engineering nail 3 is d, and the length thereof is h; d is d1-5mm, h1 is less than h/3. In this embodiment, h is 30mm to 50mm, d is 3mm to 5mm, and the diameter of the circular nut 31 is 4mm to 6 mm.
Preferably, the diameter of the nail hole 4 is 3 mm-5 mm, specifically the diameter of the nailed pavement engineering nail 3.
Preferably, the two-dimensional plane grid 1, the three-dimensional nodes 2 and the three-dimensional solid grid 5 are made of carbon fibers or glass fibers.
Preferably, the three-dimensional mat can be used for repairing asphalt pavements, concrete pavements and asphalt concrete pavements.
The construction method for repairing the pavement pit slot based on the three-dimensional net cushion (the construction method for short) comprises the following steps:
(1) measuring the range and the depth of the pit diseases, and determining the size and the depth of pit repair:
according to the principles of 'square patching of round holes and deep patching of shallow holes' in the pavement pit slot patching principle, marking out a square slotting contour line along the parallel or vertical direction of the center line of a road, wherein the size of a patching block is 5-30 cm larger than the damaged boundary of a pit slot; the repairing depth is based on the principle of 'which layer is damaged, which layer is excavated and the bottom of the damaged structural layer', namely, the upper layer is damaged, and the upper layer is excavated to the bottom of the upper layer; if the middle surface layer is damaged, digging to the bottom of the middle surface layer; and if the depth of the pit reaches the lower layer, digging to the bottom of the lower layer.
(2) Excavating and forming: excavating damaged old materials in a pit area, wherein the wall surface of the pit is required to be vertical to the road surface after excavation, and the bottom surface is flat, smooth and solid; thoroughly removing residual old materials and broken stones inside and around the pit slot;
(3) coating a bonding layer: coating a bonding layer on the side wall and the bottom surface of the pit groove to ensure that the bonding layer is uniform and not too large in thickness; generally, SBS modified asphalt with better viscosity or epoxy modified asphalt with better compatibility is selected as a bonding layer material;
preferably, the brushing sequence is that the side wall is firstly brushed and the bottom surface is secondly brushed;
(4) paving and forming: selecting a proper three-dimensional net cushion type according to the actual excavation size and depth of the pit; when the size and the depth of the pit are small, the three-dimensional node integrated three-dimensional net cushion can be selected, so that the repairing material is compacted and constructed conveniently; when the pit slot is large in size and depth, the three-dimensional node separation type three-dimensional net cushion or the vertical net type three-dimensional net cushion can be selected, and construction compaction of the net cushion is facilitated on the premise that compaction degree is not influenced.
The method comprises the following steps of firstly, paving and forming by adopting a three-dimensional node integral three-dimensional net cushion:
(4.1) laying a three-dimensional net cushion: the three-dimensional node integrated three-dimensional net cushion is paved on the bottom surface and all the side walls of the pit groove, the three-dimensional net cushion is ensured to be tightly attached to the bottom surface and the side walls of the pit groove under the action of the bonding layer, then the pavement engineering nails 3 are nailed into the nailing holes 4 to fix the three-dimensional node integrated three-dimensional net cushion on the bottom surface and the side walls of the pit groove, and the movement of the three-dimensional net cushion under the load action is restrained through the contact of the pavement engineering nails 3 and the three-dimensional nodes 2;
(4.2) filling repair materials: filling a repairing material into the pit slot, ensuring uniform paving while filling the material, and finally scraping the top of the repairing material; the height of the patching material is 1 cm-3 cm higher than the surrounding pavement;
and a second mode, paving and forming by adopting a three-dimensional node separated three-dimensional net cushion: in order to ensure that the construction is convenient and the three-dimensional net cushion at the bottom layer of the pit groove is smoothly laid, the paving sequence is that the bottom surface is firstly paved, and the back side surface is paved.
(4.1) paving and forming the bottom surface and the corresponding layer of side wall of the pit: laying two-dimensional plane grids 1 on the bottom surface and all side walls of the pit slot, and ensuring that the two-dimensional plane grids 1 are tightly attached to the bottom surface and the side walls of the pit slot under the action of the bonding layer; then, the three-dimensional nodes 2 are placed on the planar grid circular nodes 12 on the bottom surface of the pit and all the planar grid circular nodes 12, which are positioned on the side wall of the pit and are below the height of the three-dimensional nodes 2 on the bottom surface of the pit (in the embodiment, the planar grid circular nodes 12 on the bottommost layer (namely, the first layer) of the side wall of the pit are placed on the three-dimensional grid circular nodes 12 on the bottom surface of the pit); fixing the set three-dimensional nodes 2 and the planar grid circular nodes 12 on the bottom surface of the pit and the corresponding side walls of the pit by using the pavement engineering nails 3, and then filling the repairing material until the repairing material completely submerges the three-dimensional net pad on the bottom surface of the pit;
(4.2) paving and forming the side walls of the rest layers of the pit: placing the three-dimensional nodes 2 on the planar grid circular nodes 12 of the second bottom layer (namely the second layer) of the two-dimensional planar grid 1 on the side wall of the pit slot, fixing the three-dimensional nodes 2 and the planar grid circular nodes 12 of the second bottom layer inside the side wall of the pit slot by using the nails 3 for road surface engineering, and then filling the repair materials until the three-dimensional nodes 2 of the second bottom layer are submerged; treating the third layer by the same method until reaching the topmost layer; finally, the top of the repair material is strickled; the height of the patching material is 1 cm-3 cm higher than the surrounding pavement;
and thirdly, paving and forming by adopting a vertical net type three-dimensional net cushion (namely, a three-dimensional node separated type three-dimensional net cushion with three-dimensional grids):
(4.1) laying a three-dimensional net cushion: two-dimensional plane grids 1 are laid on the bottom surface and all the side walls of the pit groove, after the two-dimensional plane grids 1 are ensured to be tightly attached to the bottom surface and the side walls of the pit groove under the action of the bonding layer, three-dimensional solid grids 5 are laid on the bottom surface and all the side walls of the pit groove, so that the circular nodes 52 of the plane connection grids are tightly attached to the circular nodes 12 of the plane connection grids and are opposite in position, the three-dimensional nodes 2 are placed on all the circular nodes 52 of the plane connection grids, and then the three-dimensional net mats of the vertical net type are fixed to the bottom surface and all the side walls of the pit groove by nailing holes 4 with nails 3 for road engineering;
(4.2) filling repair materials: filling a repairing material into the pit slot, ensuring uniform paving while filling the material, and finally scraping the top of the repairing material; the height of the patching material is 1 cm-3 cm higher than the surrounding pavement;
(4.1) paving and forming the bottom surface and the corresponding layer of side wall of the pit: laying two-dimensional plane grids 1 on the bottom surface and all side walls of the pit slot, and ensuring that the two-dimensional plane grids 1 are tightly attached to the bottom surface and the side walls of the pit slot under the action of the bonding layer; then, three-dimensional grids 5 are paved on the bottom surface and all the side walls of the pit (the bottom surface realizes the paving of the three-dimensional grids 5 through gravity, and the side walls can realize the paving of the three-dimensional grids 5 through the clamping force capable of unloading), so that the plane connecting grid circular nodes 52 are tightly attached to the plane grid circular nodes 12 and are opposite to the plane connecting grid circular nodes; then, the three-dimensional nodes 2 are placed on the planar connection grid circular nodes 52 on the bottom surface of the pit and all the planar connection grid circular nodes 52 on the side wall of the pit, which are positioned below the three-dimensional nodes 2 on the bottom surface of the pit (in the embodiment, the planar connection grid circular nodes 52 on the bottommost layer of the side wall of the pit are positioned); fixing the set three-dimensional nodes 2, the planar connection grid circular nodes 52 and the planar grid circular nodes 12 on the bottom surface of the pit and the corresponding side wall of the pit by using the nails 3 for road surface engineering, and then filling the repairing material until the repairing material is completely submerged in the vertical-net type three-dimensional net pad on the bottom surface of the pit;
(4.2) paving and forming the side walls of the rest layers of the pit: placing the three-dimensional node 2 on a plane connection grid circular node 52 of a secondary bottom layer (namely a second layer) of a three-dimensional grid 5 on the side wall of the pit slot, fixing the three-dimensional node 2, the secondary bottom layer plane connection grid circular node 52 and a secondary bottom layer plane grid circular node 12 inside the side wall of the pit slot by using a nail 3 for road surface engineering, and filling a repairing material until the secondary bottom layer three-dimensional node 2 is submerged; treating the third layer by the same method until reaching the topmost layer; finally, the top of the repair material is strickled; the height of the patching material is 1 cm-3 cm higher than the surrounding pavement;
preferably, in the step (4), the interval between the adjacent road surface engineering nails 3 is 10-100 mm.
(5) Compacting: the edge of the pit slot is compacted firstly by adopting a road roller according to the sequence from the edge to the middle, and then the edge is circularly and repeatedly rolled to the middle part, so that the smoothness of the repair material is ensured, and the repair material is smoothly jointed with the original pavement.
Preferably, the pavement is an asphalt pavement, a concrete pavement or an asphalt concrete pavement.
Example 1
The two-dimensional plane grid 1 and the three-dimensional nodes 2 are connected into a whole when being manufactured and delivered from a factory, and the three-dimensional nodes 2 are positioned above the circular nodes 12 of the plane grid to form the three-dimensional node integrated three-dimensional net cushion. As shown in fig. 2, the first-layer planar mesh circular nodes 12 are 4 of the lowermost layer in fig. 2, and the topmost planar mesh circular nodes 12 are 4 of the fourth layer in fig. 2.
The planar grid wires 11 are strip-shaped, 3mm in width and 2mm in thickness. The diameter of the planar mesh circular nodes 12 is 10 mm. The planar mesh 13 is square with a side length of 30 mm.
The three-dimensional node 2 is a three-dimensional circular truncated cone node, the diameter d1 of the upper bottom circle 21 is 8mm, the diameter d2 of the lower bottom circle 22 is 10mm, and the height h1 is 10 mm.
The road surface engineering nail 3 is a rivet, the diameter d is 3mm, the length h is 40mm, the diameter of the circular nut 31 is 4mm, the thickness of the circular nut 31 is 1mm, and the horizontal and vertical spacing of the adjacent road surface engineering nails 3 is 33 mm.
The nail holes 4 are round, the diameter is 3mm, and the depth penetrates through the whole three-dimensional net pad.
Example 2
The two-dimensional plane grid 1 and the three-dimensional nodes 2 are respectively molded when being manufactured and delivered from a factory to form the three-dimensional node separated type three-dimensional net cushion. As shown in fig. 5, the bottommost (i.e., first layer) planar mesh circular nodes 12 are 4 of the bottommost layer in fig. 5, and the topmost planar mesh circular nodes 12 are 4 of the fourth layer in fig. 5.
The planar grid wires 11 are flat and long strips, and have a width of 3mm and a thickness of 2 mm. The diameter of the planar mesh circular nodes 12 is 10 mm. The shape of the plane mesh 13 adopts an isosceles right triangle, the length of the right-angle side is 30mm, and the length of the hypotenuse side is 42.43 mm.
The three-dimensional node 2 is a three-dimensional circular truncated cone node, the diameter d1 of the upper bottom circle 21 is 8mm, the diameter d2 of the lower bottom circle 22 is 10mm, and the height h1 is 10 mm.
The road surface engineering nail 3 is a cement nail, the diameter d is 3mm, the length h is 40mm, the diameter of the circular nail cap 31 is 4mm, and the thickness of the circular nail cap 31 is 1 mm.
The nail holes 4 are round, the diameter is 3mm, and the depth penetrates through the whole three-dimensional net pad.
Example 3
The two-dimensional plane grid 1, the three-dimensional nodes 2 and the three-dimensional grid 5 are respectively molded when being manufactured and delivered from a factory to form a vertical net type three-dimensional net pad;
the planar grid wires 11 are flat and long strips, and have a width of 3mm and a thickness of 2 mm. The diameter of the planar mesh circular nodes 12 is 10 mm. The planar mesh 13 is square with a side length of 30 mm.
The three-dimensional node 2 is a three-dimensional circular truncated cone node, the diameter d1 of the upper bottom circle 21 is 8mm, the diameter d2 of the lower bottom circle 22 is 10mm, and the height h1 is 10 mm.
The road surface engineering nail 3 is a cement nail, the diameter d is 3mm, the length h is 40mm, the diameter of the circular nail cap 31 is 4mm, the thickness of the circular nail cap 31 is 1mm, and the horizontal and vertical spacing of the adjacent road surface engineering nails 3 is 33 mm.
The nail holes 4 are round, the diameter is 3mm, and the depth penetrates through the whole three-dimensional net pad.
The spherical three-dimensional grid lines 51 and the plane connection grid lines 54 are in the shape of circular bars, and the diameter of each of the circular bars is 1 mm. The spherical three-dimensional grid lines 51 comprise 6 arc grid lines and 3 horizontal ring lines; one end of each of the 6 arc-shaped grid lines is converged to one point and connected with each other, and the other end of each of the 6 arc-shaped grid lines is connected to 1 horizontal ring line; the other two horizontal circular lines are connected with 6 arc-shaped grid lines and are positioned between the convergence point and the lowest 1 horizontal circular line to form a small semi-sphere which is an upward convex spherical three-dimensional grid line 51. The convex height of the spherical three-dimensional grid line 51 is 20mm, and the diameter of the bottom circle is 42.43 mm.
The spherical three-dimensional grid lines 51 form three layers of 18 three-dimensional grid meshes 53; the three-dimensional mesh 53 at the bottom layer is spread into a plane shape and is in a fan-shaped ring shape, the arc length of the lower bottom is 22mm, the arc length of the upper bottom is 20mm, and the length of the bevel edges at two sides is 12 mm; the three-dimensional mesh 53 of the middle layer is spread into a plane shape and is fan-shaped, the arc length of the lower bottom is 20mm, the arc length of the upper bottom is 15mm, and the length of the bevel edges at two sides is 12 mm; the three-dimensional mesh 53 at the uppermost layer is spread into a fan shape, the arc length is 15mm, and the side length at two sides is 12 mm.
The diameter of the planar connected grid circular nodes 52 is 10mm and the thickness is 2 mm.
Nothing in this specification is said to apply to the prior art.
Claims (10)
1. A three-dimensional net pad for repairing a pit slot on a pavement is characterized by comprising two-dimensional plane grids (1) and three-dimensional nodes (2);
the two-dimensional plane grid (1) comprises plane grid lines (11), plane grid circular nodes (12) and plane grid meshes (13); a plurality of plane grid lines (11) which are regularly arranged are connected with each other to form a plane structure; the intersection points of the plane grid lines (11) are provided with plane grid circular nodes (12), and the gaps form plane grid meshes (13); all the plane grid meshes (13) in the two-dimensional plane grid (1) are completely the same; the center of the plane grid circular node (12) is provided with a vertically through nail hole (4) which is used for matching with a nail (3) for road surface engineering;
the three-dimensional node (2) is a three-dimensional structure with a round bottom surface; the diameter of the circular bottom surface is the same as that of the circular nodes (12) of the planar grid; a vertically through nail hole (4) is formed in the center of the three-dimensional node (2) and is used for being matched with a nail (3) for pavement engineering;
the two-dimensional plane grid (1) and the three-dimensional nodes (2) are connected into a whole when being manufactured and delivered from a factory, and the three-dimensional nodes (2) are positioned above the circular nodes (12) of the plane grid to form a three-dimensional node integrated three-dimensional net cushion; or the two-dimensional plane grid (1) and the three-dimensional nodes (2) are respectively molded when being manufactured and delivered out of a factory to form a three-dimensional node separated type three-dimensional net cushion, and the three-dimensional nodes (2) are positioned above the two-dimensional plane grid (1) and fixed through the pavement engineering nails (3) when in use.
2. The three-dimensional mesh pad for repairing a pavement pit according to claim 1, wherein the planar grid lines (11) are in the shape of long strips or circular strips; the diameter of the planar grid circular nodes (12) is greater than the width or diameter of the planar grid lines (11).
3. The three-dimensional mesh pad for repairing a pavement pit slot as claimed in claim 1, wherein the side length of all the edges enclosing each planar mesh (13) is 10 mm-50 mm, so that the size of the planar mesh (13) is not less than 2-3 times of the size of the largest crushed stone in the repair material, and the largest crushed stone in the repair material can pass through and be rolled conveniently.
4. The three-dimensional mesh pad for repairing a pavement pit according to claim 1, wherein the shape of the planar mesh (13) is a regular polygon.
5. The three-dimensional net pad for repairing the pavement pit slot as claimed in claim 1, wherein the three-dimensional node (2) is a cylinder or a circular truncated cone to form a three-dimensional cylinder node or a three-dimensional circular truncated cone node; the diameter of the upper bottom surface circle (21) is d1, the diameter of the lower bottom surface circle (22) is d2, and d1 is not more than d 2; the height of the three-dimensional node (2) is h1, and h1 is d 2.
6. The three-dimensional mesh pad for repairing a pavement pit according to claim 1, wherein the three-dimensional node-separated three-dimensional mesh pad further comprises a three-dimensional solid mesh (5); the three-dimensional stereo grid (5) comprises convex spherical stereo grid lines (51) and plane connecting grid lines (54);
the non-convex ends of the spherical three-dimensional grid lines (51) and the plane connecting grid lines (54) are integrally formed or mutually connected to form a three-dimensional structure; three-dimensional grid meshes (53) are formed at the gaps of the spherical three-dimensional grid lines (51); the intersection points of the plane connection grid lines (54) are provided with plane connection grid circular nodes (52); the center of the plane connection grid circular node (52) is provided with a vertically through nail hole (4) which is used for matching with a nail (3) for road surface engineering;
the three-dimensional node separated three-dimensional net cushion and the three-dimensional grid (5) are respectively molded when being manufactured and delivered from a factory to form a vertical net type three-dimensional net cushion; when the three-dimensional node is used, the three-dimensional node (2) is positioned above the plane connection grid circular node (52), the plane connection grid circular node (52) is positioned above the plane grid circular node (12), and the three are fixed by the pavement engineering nail (3).
7. The three-dimensional mesh pad for repairing a pavement pit according to claim 6, wherein the side length of all the edges enclosing each three-dimensional mesh (53) is 10-50 mm, so that the size of each three-dimensional mesh (53) is not less than 2-3 times of the size of the largest crushed stone in the repairing material, and the largest crushed stone in the repairing material can pass through and be rolled conveniently.
8. The three-dimensional mesh pad for repairing a pavement pit according to claim 6, wherein the spherical three-dimensional grid lines (51) and the plane connection grid lines (54) are both in a strip shape or a round bar shape; the diameter of the planar connected grid circular nodes (52) is greater than the width or diameter of the planar connected grid lines (54).
9. The three-dimensional net pad for repairing a pavement pit slot according to claim 6, wherein the arrangement position and size of the planar connection grid circular nodes (52) are identical to those of the planar grid circular nodes (12); the shape of the three-dimensional mesh (53) is a regular polygon.
10. The three-dimensional net pad for repairing a pavement pit according to claim 6, wherein the spherical surface of the spherical three-dimensional grid line (51) is a spherical surface or an ellipsoidal surface, the height of the protrusions is a semi-sphere or a semi-ellipsoid, and the highest height of the protrusions is higher than the height h1 of the three-dimensional node (2).
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| CN202210576964.5A CN114960337B (en) | 2022-05-25 | 2022-05-25 | Three-dimensional net pad for repairing pavement pit |
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| CN114960337B CN114960337B (en) | 2023-05-26 |
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Citations (5)
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|---|---|---|---|---|
| CN1493745A (en) * | 2002-10-28 | 2004-05-05 | 李兰英 | Method of preventing to produce crack on road surface and product |
| US20150191878A1 (en) * | 2014-01-09 | 2015-07-09 | David J. White | Three-dimensional aggregate reinforcement systems and methods |
| CN209384077U (en) * | 2018-12-06 | 2019-09-13 | 福州大学 | A kind of bar planting formula asphalt pavement pit repairing structure |
| CN212270898U (en) * | 2020-04-15 | 2021-01-01 | 广州天羽建筑材料有限公司 | Novel composite geotechnical pad |
| CN214883547U (en) * | 2021-06-16 | 2021-11-26 | 南昌天高环保科技股份有限公司 | Biaxial stretching plastics geogrid |
-
2022
- 2022-05-25 CN CN202210576964.5A patent/CN114960337B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493745A (en) * | 2002-10-28 | 2004-05-05 | 李兰英 | Method of preventing to produce crack on road surface and product |
| US20150191878A1 (en) * | 2014-01-09 | 2015-07-09 | David J. White | Three-dimensional aggregate reinforcement systems and methods |
| CN209384077U (en) * | 2018-12-06 | 2019-09-13 | 福州大学 | A kind of bar planting formula asphalt pavement pit repairing structure |
| CN212270898U (en) * | 2020-04-15 | 2021-01-01 | 广州天羽建筑材料有限公司 | Novel composite geotechnical pad |
| CN214883547U (en) * | 2021-06-16 | 2021-11-26 | 南昌天高环保科技股份有限公司 | Biaxial stretching plastics geogrid |
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| CN114960337B (en) | 2023-05-26 |
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