CN114753225A - Repairing structure and construction method for micro-surfacing of ultra-wide and ultra-deep track - Google Patents
Repairing structure and construction method for micro-surfacing of ultra-wide and ultra-deep track Download PDFInfo
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- CN114753225A CN114753225A CN202210393472.2A CN202210393472A CN114753225A CN 114753225 A CN114753225 A CN 114753225A CN 202210393472 A CN202210393472 A CN 202210393472A CN 114753225 A CN114753225 A CN 114753225A
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
- E01C23/098—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants and working the surface of the filling or applying particulate material thereto, e.g. smoothing, gritting
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/096—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating and filling
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
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- Road Paving Structures (AREA)
Abstract
The invention relates to a repairing structure and a construction method for micro-surfacing of an ultra-wide and ultra-deep track, which comprises a track excavation area, a reinforcing section, a micro-anchor rod, a first grouting hole, a first filler, a second grouting hole, a second filler, a single-layer steel wire grating, a double-layer steel wire grating, an MS-3 type micro-surfacing layer, an MS-2 type micro-surfacing layer, a bonding layer and a recycling layer, wherein the track excavation area is divided into a track excavation area, a reinforcing section, a micro-anchor rod area and a track excavation area; firstly, constructing a rut excavation area, then performing micro-drilling high polymer grouting and micro-drilling grouting, then mounting a steel wire grid, then constructing a broken pavement recycling layer, a bonding layer and an MS-2 type micro-surfacing layer, and finally performing MS-3 type micro-surfacing layer construction after the connection reinforcing section is mounted. The pavement repairing structure is reasonable in arrangement, exerts the characteristics of all materials, has complementary advantages, saves materials, improves the rut resistance of the pavement and the flying resistance of a micro-surface, obviously reduces the noise of the pavement, avoids waste caused by repeated rut repairing, and improves the operation efficiency.
Description
Technical Field
The invention belongs to the technical field of pavement maintenance, and particularly relates to a repairing structure and a construction method for a micro-surfacing of an ultra-wide and ultra-deep rut.
Background
With the high-speed development of national economy, the road construction business of China makes a breakthrough progress. Under the influence of climate, geography, traffic conditions and other factors, the high-grade asphalt concrete pavement built in early stage of China enters the maintenance period successively. Ruts are the indentations of the wheels left after the vehicle has traveled on a road surface. Most ruts are formed by instability, sagging and lateral displacement of the pavement layer material under the shear stress generated by traffic loads. Modern pavement ruts are an important index in periodic pavement evaluation and pavement maintenance. The rutting depth of the road surface directly reflects the driving comfort of the vehicle and the safety and service life of the road surface.
The micro-surfacing rapid track repairing technology is a thin layer paving technology of a cold-mix asphalt mixture with unequal thickness, which is constructed by taking polymer modified emulsified asphalt as a binding material and using special paving equipment, has the characteristics of high construction speed, low cost, quick open traffic, good effect and the like, can quickly recover and improve the flatness of the original asphalt pavement, and improves the waterproofness and the skid resistance. Compared with the traditional milling and hot-paving overlay surface, the technology for repairing the ruts has the characteristics of convenience and rapidness in construction, excellent road performance, quickness in open traffic and the like, and the ruts can be completely prevented from appearing only by designing according to a mix proportion design method provided by the center, which cannot be realized by the milling and hot-paving overlay surface technology. However, the technology has obvious defects, the cost of required materials is higher when ultra-wide and ultra-deep track repairing is carried out, the noise of the micro-surfacing road surface is obviously higher than that of a common asphalt road surface, the comfort of drivers and passengers is seriously influenced, the urban environment and the living quality of residents are further influenced, and the comprehensive development of the micro-surfacing maintenance technology is seriously restricted. In addition, the micro-surfacing mixture is in a suspended compact structure, the discreteness among coarse aggregates is increased, the coarse aggregates are easily unevenly distributed, a framework structure is difficult to form, and the anti-scattering capability is poor.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, provides the ultra-wide and ultra-deep track micro-surfacing repair structure and the construction method, can improve the bearing capacity and the anti-track capacity of the repaired road surface through micro-drilling grouting and micro-drilling high polymer grouting, enhances the integrity with the original road surface and a roadbed, avoids waste caused by repeated track repair, and improves the operation efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
super wide ultra-deep rut micro-surfacing department repairs structure, its characterized in that: the novel micro-surfacing device comprises a first excavating groove, a second excavating groove and a third excavating groove which are sequentially arranged from top to bottom, wherein the first excavating groove, the second excavating groove and the third excavating groove are in a step shape, the bottom of the third excavating groove is communicated with a first grouting hole, a first filler is arranged in the first grouting hole, a second grouting hole is arranged at the bottom of the second excavating groove, a second filler is arranged in the second grouting hole, and a recycling layer, an MS-2 type micro-surfacing layer and an MS-3 type micro-surfacing layer are sequentially arranged on the third excavating groove, the second excavating groove and the first excavating groove from bottom to top. When restoreing, through set up at the bottom for drilling slip casting, improve the bearing capacity and the anti rut ability of repairing the road surface, strengthened with the wholeness of former road surface and road bed, avoid the repeated repair rut and the waste that causes, improve operation efficiency. By arranging the MS-2 micro surfacing layer to transit to the MS-3 micro surfacing layer, the anti-scattering capability of the micro surfacing layer can be improved, and meanwhile, the road noise is obviously reduced.
Further, the bottom of third cut groove is equipped with double-deck steel wire grid, through double-deck steel wire grid's setting, can improve bulk strength and corrosion resisting property, and effective distribution load improves the maximum load that can bear, improves road surface structural integrity and anti rutting ability.
Further, the second excavation groove is equipped with single-deck steel wire grid, through single-deck steel wire grid's setting, can improve bulk strength and corrosion resisting property, and effective distribution load improves the maximum load that can bear, improves road surface structural integrity and anti rutting ability.
Furthermore, the two sides of the second excavating groove are provided with micro anchor rods, and the micro anchor rods are connected with the single-layer steel wire grating. The micro anchor rod has high strength, can bear larger variable load, and improves the structural integrity and the anti-rutting capability of the pavement.
Furthermore, a strengthening section is arranged between the MS-2 type micro-surfacing layer and the MS-3 type micro-surfacing layer, the strengthening section consists of a strengthening steel wire grid, waterproof cloth and steel bars, the waterproof cloth is arranged on the strengthening steel wire grid, and the steel bars are arranged on two sides of the strengthening steel wire grid. The reinforcing section is simple and convenient to construct, the weak connection part of the MS-2 micro surfacing layer and the MS-3 micro surfacing layer is effectively reinforced, and the structural integrity and the local waterproof capacity of the pavement are improved.
Further, a bonding layer is arranged between the recycling layer and the MS-2 type micro-surfacing layer. The adhesion effect between the recycling layer and the MS-2 type micro-surfacing layer is improved, and the pavement integrity is improved.
Further, the recycling layer is composed of road surface broken particles with the particle size of 5.0-10.0 mm, scrap tires with the particle size of 1.0-5.0 mm, limestone powder, cement paste and an early strength agent according to a certain proportion. The asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement crushing particles is effectively utilized by the recycling layer, meanwhile, natural fine sand is replaced by limestone powder, and the prepared slurry mixture is good in performance, capable of greatly reducing the cost of micro-surfacing, economical and environment-friendly.
Further, the first filler is made of a high polymer material consisting of special resin and a hardening agent, and is subjected to micro-drilling high polymer grouting; and the second filler adopts cement mortar micro-drilling grouting. By means of micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the anti-rutting capacity of the repaired pavement are improved, and the integrity of the repaired pavement and the original roadbed is enhanced.
The construction method for repairing the structure at the micro-surface of the ultra-wide and ultra-deep rut is characterized by comprising the following steps:
1) and (3) construction of a rut excavation area: determining the excavation width and depth of a rut excavation area according to the size of the rut, wherein if the width of the rut is L, the depth is H, the width of a left rut flange is L1, and the width of a right rut flange is L2, the excavation width of a first excavation groove is L + 2L 1+ 2L 2, the depth is 0.5H, the excavation width of a second excavation groove is L + L1+ L2, the depth is 0.5H, the excavation width of a third excavation groove is L, and the depth is 0.5H;
2) Micro-drilling is carried out on the pavement structure layer below the third excavated groove to form a first grouting hole, the depth of the first grouting hole drilled into the pavement structure layer reaches 3-5d, the distance between micro-drilling holes is 3-5d, and d is the diameter of the micro-drilling hole;
3) preparing special resin (such as epoxy resin) in advance, doping a proper amount of catalyst type hardening agent (such as cation initiator), polymerizing the resin to form a high polymer material under the condition of not needing precise proportioning, then placing a grouting pipe into a first grouting hole of a third excavated slot, installing an injection cap, and then performing micro-drilling high polymer grouting to form a first filler;
4) micro-drilling is carried out on the pavement structure layer below two sides of the second excavating groove to form second grouting holes, the second grouting holes are deeply drilled to the bottom of the pavement structure layer, the distance between every two micro-drilling holes is 5-7d, d is the diameter of each micro-drilling hole, and if the distance is not enough, at least two rows of drilling holes are formed;
5) preparing cement paste, placing a grouting pipe in a second grouting hole of the second excavating groove, installing an injection cap, and then performing micro-drilling grouting to form a second filler;
6) laying a double-layer steel wire grating at the bottom of the third excavated groove, laying a single-layer steel wire grating at the bottoms of the two sides of the second excavated groove, overlapping the single-layer steel wire grating and the double-layer steel wire grating, and fixing the other side of the single-layer steel wire grating by using a micro anchor rod arranged on a pavement structure layer;
7) Crushing the fragments of the road surface excavated in the rut excavation area, screening out the asphalt mixture with the particle size of 5.0-10.0 mm, cleaning the asphalt mixture with the particle size of 5.0-10.0 mm, and collecting the asphalt mixture for later use
8) Mixing and stirring 45% -60% of asphalt mixture with the particle size of 5.0-10.0 mm, 10% -20% of tire scraps with the particle size of 1.0-5.0 mm, 10% -15% of limestone powder, 15% -20% of cement paste and 1% -2% of early strength agent in the pavement broken particles to form a slurry backfill mixture;
9) paving the prepared slurry backfill mixture in a backfill rut excavation area to form a broken pavement recycling layer with the thickness of 0.75H, wherein the broken pavement recycling layer has certain self-sealing property;
10) after the strength of the recycled layer of the broken pavement reaches 70%, performing surface roughening, constructing a bonding layer, and then constructing and paving an MS-2 type micro surfacing layer above the bonding layer, wherein the thickness is 0.25H;
11) manufacturing a reinforcing section component in advance, arranging a steel bar at one end into a pavement structure layer at the inflection point of the first excavated slot and the second excavated slot, and arranging a steel bar at the other end into an MS-2 type micro-surfacing layer;
12) mixing a proper amount of stone chips, emulsified asphalt, water and additives into an asphalt mixture with the particle size of 5.0-10.0 mm in the pavement crushed particles to prepare a regenerated emulsified asphalt slurry mixture for constructing an MS-3 micro-surfacing layer;
13) And after the reinforcing section is installed, an MS-3 type micro surfacing layer is constructed and paved above the MS-2 type micro surfacing layer, the thickness is 0.5H, and finally the construction of the ultra-wide ultra-deep rut micro surfacing repairing structure is completed.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. according to the invention, through micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the anti-rutting capability of the repaired road surface are improved, the integrity with the original road surface and the roadbed is enhanced, the waste caused by repeated rut repair is avoided, the operation efficiency is improved, and the technical benefit advantage is obvious.
2. According to the invention, the crushing surface recycling layer effectively utilizes the asphalt mixture with the particle size of 5.0-10.0 mm in the original road surface waste materials, and meanwhile, the limestone powder is used for replacing natural fine sand, so that the prepared slurry mixture has good performance, the cost of micro-surfacing can be greatly reduced, and the method is economical and environment-friendly.
3. The MS-2 micro-surfacing layer is transited to the MS-3 micro-surfacing layer, so that the anti-scattering capability of the micro-surfacing layer can be improved, the road noise is obviously reduced, the connection reinforcing section is additionally arranged, the connection weak point of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively reinforced, and the structural integrity and the local waterproof capability of the road are improved.
4. The micro anchor rods and the steel wire grids are high in strength, corrosion-resistant, convenient to construct, capable of effectively distributing load, capable of bearing larger variable load and capable of improving structural integrity and rutting resistance of a pavement.
5. According to the invention, the asphalt mixture with the particle size of 5.0-10.0 mm in the original waste pavement materials is used for preparing the MS-3 micro-surfacing asphalt mixture, the asphalt mixture recovered from the waste pavement materials is fully utilized, and the economic and environmental benefits are obvious.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic view of an ultra-wide ultra-deep rut micro-surfacing repair structure;
FIG. 2 is a schematic cross-sectional view of a rut excavation area;
FIG. 3 is a schematic view of the placement of a micro-drilled high polymer grout;
FIG. 4 is a schematic layout of micro-borehole grouting;
FIG. 5 is a schematic layout of a wire grid;
FIG. 6 is a schematic view of a broken pavement recycling layer;
FIG. 7 is a schematic representation of an MS-2 type micro-surfacing layer;
FIG. 8 is a schematic view of the arrangement of the connecting reinforcement segments;
FIG. 9 is a perspective view of a partial arrangement of connecting reinforcement segments;
FIG. 10 is a flow chart of a construction process for ultra-wide ultra-deep rut micro-surfacing repair structures.
In the figure, 1-first cut groove; 2-second digging groove; 3-digging a groove in a third mode; 4-a first grouting hole; 5-a first filler; 6-second grouting holes; 7-a second filler; 8-a recycling layer; 9-MS-2 type micro-surfacing layer; 10-MS-3 type micro-surfacing layer; 11-double layer steel wire grating; 12-single layer steel wire grating; 13-micro anchor rod; 14-a reinforcement section; 15-a tie layer; 16-way base layer; 17-rutting; 18-rut flanges; 19-waterproof cloth; 20-a steel strip; 21-rigid support; 22-a pavement structure layer; 23-reinforcing steel wire grid.
Detailed Description
As shown in fig. 2, which is a structural view of a road rut breakage, rut flanges 18 are formed at both ends of the rut 17.
As shown in fig. 1, 3 to 9, the ultra-wide and ultra-deep rut micro-surfacing repair structure of the invention comprises a first excavation groove 1, a second excavation groove 2 and a third excavation groove 3 which are sequentially arranged from top to bottom, wherein the first excavation groove 1, the second excavation groove 2 and the third excavation groove 3 are in a step shape, the bottom of the third excavation groove 3 is communicated with a first grouting hole 4, a first filler 5 is arranged in the first grouting hole 4, a second grouting hole 6 is arranged at the bottom of the second excavation groove 2, a second filler 7 is arranged in the second grouting hole 6, and a reuse layer 8, an MS-2 type micro-surfacing layer 9 and an MS-3 type micro-surfacing layer 10 are sequentially arranged from bottom to top in the third excavation groove 3, the second excavation groove 2 and the first excavation groove 1. When repairing, through seting up for drilling slip casting in the bottom, improve the bearing capacity and the anti rut ability of repairing the road surface, strengthened with the wholeness of original road surface and road bed, avoid the repeated repair rut and the waste that causes, improve operation efficiency. By arranging the MS-2 type micro surfacing layer 9 to transit to the MS-3 type micro surfacing layer 10, the anti-flying capability of the micro surfacing can be improved, and the road noise can be obviously reduced.
The bottom of third cut 3 is equipped with double-deck steel wire grid 11, through double-deck steel wire grid 11's setting, can improve bulk strength and corrosion resisting property, and effective distribution load improves the maximum load that can bear, improves road surface structural integrity and anti rutting ability.
The second excavation groove 2 is equipped with individual layer steel wire grid 12, through the setting of individual layer steel wire grid 12, can improve bulk strength and corrosion resisting property, and effective distribution load improves the maximum load that can bear, improves road surface structural integrity and anti rutting ability.
Two sides of the second excavation groove 2 are provided with micro anchor rods 13, and the micro anchor rods 13 are connected with the single-layer steel wire grating 12. The micro anchor rods 13 have high strength, can bear larger variable load, and improve the structural integrity and the anti-rutting capability of the pavement.
A reinforcing section 14 is arranged between the MS-2 type micro-surfacing layer 9 and the MS-3 type micro-surfacing layer 10, the reinforcing section 14 consists of a reinforcing steel wire grid 23, a waterproof cloth 19 and steel bars 20, the waterproof cloth 19 is arranged on the reinforcing steel wire grid 23, and the steel bars are arranged on two sides of the reinforcing steel wire grid. The reinforcing section 14 is simple and convenient to construct, effectively strengthens the weak connection part of the MS-2 micro surfacing layer and the MS-3 micro surfacing layer, and improves the structural integrity and the local waterproof capability of the pavement.
An adhesive layer 15 is arranged between the recycling layer 8 and the MS-2 type micro-surfacing layer 9. The adhesion effect between the recycling layer 8 and the MS-2 type micro-surfacing layer 9 is improved, and the pavement integrity is improved.
The recycling layer is composed of pavement broken particles with the particle size of 5.0-10.0 mm, scrap tires with the particle size of 1.0-5.0 mm, limestone powder, cement paste and an early strength agent according to a certain proportion. The asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement broken particles is effectively utilized by the recycling layer, meanwhile, the natural fine sand is replaced by the limestone powder, and the prepared slurry mixture is good in performance, capable of greatly reducing the micro-surfacing cost, economical and environment-friendly.
The first filler adopts a high polymer material consisting of special resin and a hardening agent to carry out micro-drilling high polymer grouting; and the second filler adopts cement mortar micro-drilling grouting. By means of micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the anti-rutting capacity of the repaired pavement are improved, and the integrity of the repaired pavement and the original roadbed is enhanced.
The construction method for repairing the structure at the micro-surface of the ultra-wide and ultra-deep track comprises the following steps:
1) and (3) construction of a rut excavation area: determining the excavation width and depth of a rut excavation area according to the size of ruts, wherein if the width of each rut is L, the depth of each rut is H, the width of a left rut flange is L1, and the width of a right rut flange is L2, the excavation width of a first excavation groove (1) is L + 2L 1+ 2L 2, the depth of the first excavation groove is 0.5H, the excavation width of a second excavation groove (2) is L + L1+ L2, the depth of the second excavation groove is 0.5H, the excavation width of a third excavation groove (3) is L, and the depth of the third excavation groove is 0.5H;
2) Micro-drilling is carried out on a pavement structure layer (22) below the third excavated groove (3) to form a first grouting hole (4), the depth of the first grouting hole drilled into the pavement layer (16) reaches 3-5d, the distance between micro-drilling holes is 3-5d, and d is the diameter of the micro-drilling hole;
3) preparing special resin (such as epoxy resin) in advance, doping a proper amount of catalyst type hardening agent (such as cation initiator), polymerizing the resin to form a high polymer material under the condition of not needing precise proportioning, then putting a grouting pipe into a first grouting hole (4) of a third excavating groove (3), installing an injection cap, and then performing micro-drilling high polymer grouting to form a first filler (5);
4) micro-drilling is carried out on the pavement structure layer (22) below the two sides of the second excavation groove (2) to form a second grouting hole (6), the second grouting hole is deeply drilled to the bottom of the pavement structure layer (22), the distance between micro-drilling holes is 5-7d, d is the diameter of the micro-drilling hole, and if the distance is not enough, at least two rows of drilling holes are formed;
5) preparing cement paste, placing a grouting pipe in a second grouting hole (6) of the second excavating groove (2), installing an injection cap, and then performing micro-drilling grouting to form a second filler (7);
6) laying a double-layer steel wire grid (11) at the bottom of the third excavated groove (3), laying single-layer steel wire grids (12) at the bottoms of the two sides of the second excavated groove (2), well lapping the single-layer steel wire grids (12) and the double-layer steel wire grids (11), and fixing the other sides of the single-layer steel wire grids (12) by arranging micro anchor rods (13) on a pavement structure layer (22);
7) Crushing and processing the road surface fragments after excavation of the rut excavation area, screening out the asphalt mixture with the particle size of 5.0-10.0 mm, cleaning the asphalt mixture with the particle size of 5.0-10.0 mm, and collecting the asphalt mixture for later use
8) Mixing and stirring 10% -20% of chipped tires with the particle size of 1.0-5.0 mm, 10% -15% of limestone powder, 15% -20% of cement paste, 1% -2% of an early strength agent and the balance of asphalt mixture with the particle size of 5.0-10.0 mm in the crushed pavement particles to form a slurry backfill mixture;
9) paving the prepared slurry backfill mixture on a backfill rut excavation area to form a broken pavement recycling layer (8) with the thickness of 0.75H, wherein the broken pavement recycling layer has certain self-sealing property;
10) the strength of a recycling layer (8) of the road surface to be crushed reaches 70%, surface roughening is carried out, then a bonding layer (15) is constructed, and an MS-2 type micro-surfacing layer (9) is constructed and filled above the bonding layer (15) and has the thickness of 0.25H;
11) manufacturing a reinforcing section (14) component in advance, and punching a steel bar (20) at one end into a pavement structure layer (22) at the inflection point of a first excavated groove (1) and a second excavated groove (2), and punching a steel bar (20) at the other end into an MS-2 type micro surfacing layer (9);
12) mixing a proper amount of stone chips, emulsified asphalt, water and additives into an asphalt mixture with the particle size of 5.0-10.0 mm in the pavement crushed particles to prepare a regenerated emulsified asphalt slurry mixture for constructing an MS-3 type micro-surfacing layer;
13) After the reinforcing section (14) is installed, an MS-3 type micro surfacing layer (10) is constructed and paved above an MS-2 type micro surfacing layer (9), the thickness is 0.5H, and finally construction of the ultra-wide and ultra-deep rut micro surfacing repairing structure is completed.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. according to the invention, through micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the anti-rutting capability of the repaired road surface are improved, the integrity with the original road surface and the roadbed is enhanced, the waste caused by repeated rut repair is avoided, the operation efficiency is improved, and the technical benefit advantage is obvious.
2. The crushing surface recycling layer effectively utilizes the asphalt mixture with the particle size of 5.0-10.0 mm in the original waste pavement materials, and meanwhile, the limestone powder replaces natural fine sand, so that the prepared slurry mixture has good performance, can greatly reduce the cost of micro-surfacing, and is economic and environment-friendly; in addition, the appropriate amount of scrap tires are added into the recycling layer, so that the traffic impact load of the road surface can be effectively buffered and absorbed, and the service life of the ultra-wide and ultra-deep rut micro-surfacing repair structure can be prolonged.
3. The MS-2 micro-surfacing layer is transited to the MS-3 micro-surfacing layer, so that the anti-scattering capacity of the micro-surfacing layer can be improved, the road noise is obviously reduced, the connection reinforcing section is additionally arranged, the connection weak part of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively reinforced, and the structural integrity and the local waterproof capacity of the road are improved.
4. The micro anchor rods and the steel wire grids are high in strength, corrosion-resistant, convenient to construct, capable of effectively distributing load, capable of bearing larger variable load and capable of improving structural integrity and rutting resistance of a pavement.
5. According to the invention, the asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement waste materials is used for preparing the MS-3 micro-surfacing asphalt mixture, the asphalt mixture recovered from the pavement waste materials is fully utilized, and the economic and environmental benefits are obvious.
The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (9)
1. Super wide ultra-deep rut microsurface department repairs structure, its characterized in that: the novel micro-surfacing device comprises a first excavation groove, a second excavation groove and a third excavation groove which are sequentially arranged from top to bottom, wherein the first excavation groove, the second excavation groove and the third excavation groove are in a step shape, the bottom of the third excavation groove is communicated with a first grouting hole, a first filler is arranged in the first grouting hole, a second grouting hole is arranged at the bottom of the second excavation groove, a second filler is arranged in the second grouting hole, and a recycling layer, an MS-2 micro-surfacing layer and an MS-3 micro-surfacing layer are sequentially arranged from bottom to top in the third excavation groove, the second excavation groove and the first excavation groove.
2. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: and a double-layer steel wire grating is arranged at the bottom of the third excavated slot.
3. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: the second excavation groove is provided with a single-layer steel wire grating.
4. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 3, wherein: and micro anchor rods are arranged on two sides of the second excavation groove and are connected with the single-layer steel wire grating.
5. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: a reinforcing section is arranged between the MS-2 type micro-surfacing layer and the MS-3 type micro-surfacing layer, the reinforcing section consists of a reinforcing steel wire grid, waterproof cloth and steel bars, the waterproof cloth is arranged on the reinforcing steel wire grid, and the steel bars are arranged on two sides of the reinforcing steel wire grid.
6. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: and a bonding layer is arranged between the recycling layer and the MS-2 type micro-surfacing layer.
7. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: the recycling layer is composed of pavement broken particles with the particle size of 5.0-10.0 mm, scrap tires with the particle size of 1.0-5.0 mm, limestone powder, cement paste and an early strength agent.
8. The ultra-wide ultra-deep rut micro-surfacing repair structure according to claim 1, wherein: the first filler is made of a high polymer material consisting of special resin and a hardening agent, and is subjected to micro-drilling high polymer grouting, and the second filler is made of cement mortar for micro-drilling grouting.
9. The construction method for repairing the structure at the micro-surface of the ultra-wide and ultra-deep rut based on the claim 1 is characterized by comprising the following steps:
1) and (3) construction of a rut excavation area: determining the excavation width and depth of a rut excavation area according to the size of the ruts, wherein if the width of the ruts is L, the depth is H, the width of a left rut flange is L1, and the width of a right rut flange is L2, the excavation width of a first excavation groove is L + 2L 1+ 2L 2, the depth is 0.5H, the excavation width of a second excavation groove is L + L1+ L2, the depth is 0.5H, the excavation width of a third excavation groove is L, and the depth is 0.5H;
2) micro-drilling is carried out on the pavement structure layer below the third excavated groove to form a first grouting hole, the depth of drilling into the roadbed layer reaches 3-5d, the distance between micro-drilling holes is 3-5d, and d is the diameter of the micro-drilling hole;
3) preparing special resin in advance, doping a catalyst type hardening agent, then placing a grouting pipe in a first grouting hole of a third excavated slot, installing an injection cap, and performing micro-drilling high polymer grouting to form a first filler;
4) Micro-drilling is carried out on the pavement structure layer below two sides of the second excavating groove to form second grouting holes, the second grouting holes are deeply drilled to the bottom of the pavement structure layer, the distance between every two micro-drilling holes is 5-7d, and d is the diameter of each micro-drilling hole;
5) preparing cement paste, placing a grouting pipe in a second grouting hole of the second excavating groove, installing an injection cap, and then performing micro-drilling grouting to form a second filler;
6) laying a double-layer steel wire grating at the bottom of the third excavated groove, laying a single-layer steel wire grating at the bottoms of the two sides of the second excavated groove, overlapping the single-layer steel wire grating and the double-layer steel wire grating, and fixing the other side of the single-layer steel wire grating by using a micro anchor rod arranged on a pavement structure layer;
7) crushing and processing the road surface fragments excavated in the rut excavation area, screening out the asphalt mixture with the particle size of 5.0-10.0 mm, and cleaning and collecting the asphalt mixture with the particle size of 5.0-10.0 mm for later use;
8) mixing and stirring 10% -20% of chipped tires with the particle size of 1.0-5.0 mm, 10% -15% of limestone powder, 15% -20% of cement paste, 1% -2% of early strength agent and the balance of asphalt mixture in road surface broken particles with the particle size of 5.0-10.0 mm according to a proportion to form a slurry backfill mixture;
9) paving the prepared slurry backfill mixture in a backfill rut excavation area to form a broken pavement recycling layer with the thickness of 0.75H, wherein the broken pavement recycling layer has certain self-sealing property;
10) After the strength of the recycled layer of the broken pavement reaches 70%, performing surface roughening, constructing a bonding layer, and then constructing and paving an MS-2 type micro surfacing layer above the bonding layer, wherein the thickness is 0.25H;
11) manufacturing a reinforcing section component in advance, arranging a steel bar at one end into a pavement structure layer at the inflection point of the first excavated slot and the second excavated slot, and arranging a steel bar at the other end into an MS-2 type micro-surfacing layer;
12) mixing a proper amount of stone chips, emulsified asphalt, water and additives into an asphalt mixture with the particle size of 5.0-10.0 mm in the pavement crushed particles to prepare a regenerated emulsified asphalt slurry mixture for constructing an MS-3 micro-surfacing layer;
13) and after the reinforcing section is installed, an MS-3 type micro surfacing layer is constructed and paved above the MS-2 type micro surfacing layer, the thickness is 0.5H, and finally the construction of the ultra-wide ultra-deep rut micro surfacing repairing structure is completed.
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| CN114753225B (en) | 2023-12-08 |
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