CN114753225B - Construction method of ultra-wide ultra-deep rut micro-surfacing repair structure - Google Patents
Construction method of ultra-wide ultra-deep rut micro-surfacing repair structure Download PDFInfo
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- CN114753225B CN114753225B CN202210393472.2A CN202210393472A CN114753225B CN 114753225 B CN114753225 B CN 114753225B CN 202210393472 A CN202210393472 A CN 202210393472A CN 114753225 B CN114753225 B CN 114753225B
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Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a construction method of an ultra-wide ultra-deep rut micro-surfacing repair structure, which comprises a rut 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 grid, a double-layer steel wire grid, an MS-3 type micro-surfacing layer, an MS-2 type micro-surfacing layer, a bonding layer and a recycling layer; the construction of an advanced driving rut excavation area, then micro-drilling high polymer grouting and micro-drilling grouting are carried out, then steel wire grids are installed, then a broken pavement recycling layer, a bonding layer and an MS-2 type micro-surfacing layer are constructed, and finally the construction of the MS-3 type micro-surfacing layer is carried out after the installation of a connecting reinforcing section. The pavement repairing structure is reasonably arranged, the characteristics of all materials are exerted, the advantages are complementary, the material is saved, the anti-rut capability of the pavement and the anti-scattering capability of the micro-surfacing can be improved, the pavement noise is obviously reduced, the waste caused by repeated rut repairing is avoided, and the operation efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of pavement maintenance, and particularly relates to a construction method of an ultra-wide and ultra-deep rut micro-surfacing repair structure.
Background
With the high-speed development of national economy, the highway construction industry in China makes breakthrough progress. The high-grade asphalt concrete pavement built in early stage of China enters a maintenance period in succession under the influence of climate, geography, traffic conditions and other factors. Ruts are impressions of the wheels left after a vehicle is driven on a road surface. Most ruts are formed by instability, dishing and lateral displacement of the pavement layer material under the shearing stress generated by traffic loads. Modern pavement ruts are an important index in the periodic evaluation of pavement and maintenance of pavement. The road rut depth directly reflects the comfort of the vehicle driving and the safety and life of the road surface.
The technology for quickly repairing ruts at micro-surfacing is a thin-layer paving technology of cold-mix asphalt mixture with unequal thickness, which uses polymer modified emulsified asphalt as binder and performs construction by means of special paving equipment, and has the characteristics of high construction speed, low cost, quick open traffic, good effect and the like, and can quickly recover and improve the flatness of the original asphalt pavement and improve the waterproofness and the skid resistance. Compared with the traditional milling and hot paving cover surface, the technology for repairing the ruts has the characteristics of convenience and rapidness in construction, excellent road performance, quick opening traffic and the like, and can completely avoid secondary ruts only by designing according to the mix proportion design method provided by the center, which cannot be realized by the milling and hot paving cover surface technology. However, the technology has obvious defects, the cost of required materials is high when the technology is used for repairing ultra-wide and ultra-deep tracks, and the noise of the micro-surfacing road surface is obviously higher than that of a common asphalt road surface, so that the comfort of drivers and passengers is seriously influenced, the urban environment and the life quality of residents are further influenced, and the comprehensive development of the micro-surfacing maintenance technology is seriously restricted. In addition, the mixture at the micro-surface is in a suspension compact structure, the discreteness among coarse aggregates is increased, the coarse aggregates are very easy to be 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, and provides an ultra-wide ultra-deep rut micro-surfacing repair structure and a construction method, which can improve the bearing capacity and rut resistance of a repaired pavement through micro-drilling grouting and micro-drilling high polymer grouting, enhance the integrity with an original pavement and a roadbed, avoid waste caused by repeated rut repair and improve the operation efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
ultra-wide ultra-deep rut micro-surfacing repair structure, which is characterized in that: the novel micro-surfacing device comprises a first digging groove, a second digging groove and a third digging groove which are sequentially distributed from top to bottom, wherein the first digging groove, the second digging groove and the third digging groove are in a ladder shape, a first grouting hole is communicated with the bottom of the third digging groove, a first filler is arranged in the first grouting hole, a second grouting hole is arranged at the bottom of the second digging 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 from bottom to top of the third digging groove, the second digging groove and the first digging groove. During repairing, the bottom is provided with drilling grouting, so that the bearing capacity and the rut resistance of the repaired pavement are improved, the integrity of the repaired pavement with the original pavement and the roadbed is enhanced, the waste caused by repeated rut repair is avoided, and the operation efficiency is improved. Through setting the transition of the MS-2 micro-surfacing layer to the MS-3 micro-surfacing layer, the anti-scattering capability of the micro-surfacing can be improved, and meanwhile, the road noise is obviously reduced.
Further, the bottom of third dig the groove is equipped with double-deck steel wire grid, through double-deck steel wire grid's setting, can improve bulk strength and corrosion resistance, effectively distribute the load, improve bearable maximum load, improve pavement structure wholeness and anti rutting ability.
Further, the second excavation groove is provided with a single-layer steel wire grid, through the arrangement of the single-layer steel wire grid, the overall strength and the corrosion resistance can be improved, the load can be effectively distributed, the bearable maximum load is improved, and the pavement structure integrity and the rut resistance are improved.
Further, the two sides of the second digging groove are provided with micro-anchor rods which are connected with the single-layer steel wire grid. The micro-anchor rod has high strength, can bear larger variable load, and improves the structural integrity and rut resistance of the pavement.
Further, 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. The reinforced section is simple and convenient to construct, the connection weakness of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively enhanced, and the structural integrity and the local water-proof capacity of the pavement are improved.
Further, a bonding layer is arranged between the reuse layer and the MS-2 type micro-surfacing layer. The adhesion effect between the reuse layer and the MS-2 type micro-surfacing layer is improved, and the pavement integrity is improved.
The recycling layer is composed of pavement breaking 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 early strength agent according to a certain proportion. The reuse layer effectively utilizes asphalt mixture with the grain diameter of 5.0-10.0 mm in the original pavement broken grains, and simultaneously uses limestone powder to replace natural fine sand, so that the prepared pasty mixture has good performance, the cost of micro-surfacing can be greatly reduced, and the pavement broken grain is economical and environment-friendly.
Further, the first filler adopts a polymer material composed of special resin and a hardening agent to carry out micro-drilling polymer grouting; and the second filler adopts cement mortar micro-drilling grouting. Through micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the rut resistance of the repaired pavement are improved, and the integrity of the repaired pavement with the original pavement and the roadbed is enhanced.
The construction method of the ultra-wide ultra-deep rut micro-surfacing repair structure is characterized by comprising the following steps of:
1) And (3) track excavation area construction: determining the excavation width and depth of a rut excavation area according to rut sizes, wherein if the rut width is L, the depth is H, the width of a left rut flange is L1, the width of a right rut flange is L2, the excavation width of a first excavation groove is L+2L1+2L2, 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 the pavement structure layer below the third digging groove to form a first grouting hole, wherein the depth of the drilled pavement base layer reaches 3-5d, and the distance between the micro-drilling holes is 3-5d, and d is the diameter of the micro-drilling holes;
3) Preparing special resin (such as epoxy resin) in advance, adding a proper amount of catalyst hardening agent (such as cationic initiator), polymerizing the resin to form a high polymer material without accurate proportioning, then placing a grouting pipe into a first grouting hole of a third excavated groove, and grouting the micro-drilled high polymer to form a first filler after installing an injection cap;
4) Micro-drilling the pavement structure layers below the two sides of the second digging groove to form a second grouting hole, deep drilling the second grouting hole to the bottom of the pavement structure layer, wherein the micro-drilling distance is 5-7d, d is the diameter of the micro-drilling hole, and if the distance is insufficient, at least two rows of drilling holes are formed;
5) Preparing cement slurry, placing a grouting pipe into a second grouting hole of a second excavated groove, installing an injection cap, and performing micro-drilling grouting to form a second filler;
6) Paving double-layer steel wire grids at the bottoms of the third digging grooves, paving single-layer steel wire grids at the bottoms of two sides of the second digging grooves, overlapping the single-layer steel wire grids with the double-layer steel wire grids, and fixing the other side of the single-layer steel wire grids by using micro anchor rods arranged on a pavement structure layer;
7) Crushing the pavement fragments excavated in the rutting excavation area, screening 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 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 pavement breaking particles to form a pasty backfill mixture;
9) Paving the prepared slurry backfill mixture into a backfill track excavation area to form a crushed pavement recycling layer with the thickness of 0.75H, wherein the crushed pavement recycling layer has certain self-tightness;
10 After the strength of the recycled layer of the crushed pavement reaches 70%, carrying out surface roughening, then constructing a bonding layer, and then constructing and filling an MS-2 micro-surfacing layer above the bonding layer, wherein the thickness is 0.25H;
11 Manufacturing a reinforcing section member in advance, and arranging a steel bar at one end into a pavement structure layer at the inflection points of the first digging groove and the second digging groove, and arranging a steel bar at the other end into an MS-2 micro-surfacing layer;
12 Asphalt mixture with the particle diameter of 5.0-10.0 mm in the pavement broken particles is mixed with a proper amount of stone dust, emulsified asphalt, water and additives to prepare a regenerated emulsified asphalt slurry mixture for constructing an MS-3 type micro surfacing layer;
13 After the reinforcing section is installed, an MS-3 type micro-surfacing layer is paved and filled above the MS-2 type micro-surfacing layer, the thickness is 0.5H, and finally the construction of an ultra-wide ultra-deep rut micro-surfacing repair 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 rut resistance of the repaired pavement are improved, the integrity of the repaired pavement with the original pavement 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 crushed surface recycling layer effectively utilizes the asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement waste material, and simultaneously uses limestone powder to replace natural fine sand, so that the prepared slurry mixture has good performance, the cost of micro-surfacing can be greatly reduced, and the slurry mixture is economical and environment-friendly.
3. According to the invention, through setting the transition from the MS-2 micro-surfacing layer to the MS-3 micro-surfacing layer, the anti-scattering capability of the micro-surfacing can be improved, meanwhile, the road noise is obviously reduced, and in addition, the connection reinforcing section is arranged, so that the connection weakness of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively enhanced, and the structural integrity and the local water-proof capability of the road are improved.
4. The micro-anchor rod and the steel wire grid provided by the invention have the advantages of high strength, corrosion resistance, convenience in construction, effective load distribution, capability of bearing larger variable load and improvement of the structural integrity and rut resistance of the pavement.
5. According to the invention, the asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement waste material is used for preparing the MS-3 micro surfacing asphalt mixture, the asphalt mixture recovered from the pavement waste material 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 illustration of an ultra-wide ultra-deep rut micro surfacing repair structure;
FIG. 2 is a schematic cross-sectional view of a rut excavation;
FIG. 3 is a schematic illustration of an arrangement of micro-drilled polymer grouting;
FIG. 4 is a schematic illustration of an arrangement of micro-drilling grouting;
FIG. 5 is a schematic view of an arrangement of wire grids;
FIG. 6 is a schematic view of a crushed pavement recycling layer;
FIG. 7 is a schematic diagram of a layer at a MS-2 type micro-surfacing;
FIG. 8 is a schematic illustration of the arrangement of connection stiffener segments;
FIG. 9 is a schematic perspective view of a partial arrangement of the connection stiffener;
FIG. 10 is a flow chart of a construction process of an ultra-wide ultra-deep rut micro surfacing repair structure.
In the figure, 1-a first digging groove; 2-second digging a groove; 3-third digging a groove; 4-a first grouting hole; 5-a first filler; 6-a second grouting hole; 7-a second filler; 8-a recycle layer; 9-MS-2 type micro-surfacing layer; 10-MS-3 micro-surfacing layer; 11-double-layer steel wire grids; 12-single-layer steel wire grids; 13-a micro-anchor rod; 14-reinforcing section; 15-a tie layer; 16-road base layer; 17-ruts; 18-rut flanges; 19-waterproof cloth; 20-steel bar; 21-a rigid support; 22-pavement structural layer; 23-reinforcing wire grid.
Description of the embodiments
As shown in fig. 2, which is a structural diagram of a broken pavement rut, rut flanges 18 are formed at both ends of rut 17.
As shown in fig. 1, 3 to 9, the repairing structure for the ultra-wide ultra-deep rut micro-surfacing of the invention comprises a first cut groove 1, a second cut groove 2 and a third cut groove 3 which are sequentially arranged from top to bottom, wherein the first cut groove 1, the second cut groove 2 and the third cut groove 3 are in a ladder shape, the bottom of the third cut 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 cut 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. During repairing, the bottom is provided with drilling grouting, so that the bearing capacity and the rut resistance of the repaired pavement are improved, the integrity of the repaired pavement with the original pavement and the roadbed is enhanced, the waste caused by repeated rut repair is avoided, and the operation efficiency is improved. By arranging the MS-2 type micro-surfacing layer 9 to be transited to the MS-3 type micro-surfacing layer 10, the anti-scattering capability of the micro-surfacing can be improved, and meanwhile, the road noise is remarkably reduced.
The bottom of the third digging groove 3 is provided with a double-layer steel wire grating 11, and through the arrangement of the double-layer steel wire grating 11, the overall strength and the corrosion resistance can be improved, the load can be effectively distributed, the bearable maximum load can be improved, and the pavement structure integrity and the rut resistance can be improved.
The second excavated groove 2 is provided with a single-layer steel wire grid 12, and through the arrangement of the single-layer steel wire grid 12, the overall strength and the corrosion resistance can be improved, the load can be effectively distributed, the bearable maximum load can be improved, and the pavement structure integrity and the rut resistance can be improved.
The two sides of the second digging groove 2 are provided with micro-anchor rods 13, and the micro-anchor rods 13 are connected with a single-layer steel wire grid 12. The micro-anchor rods 13 have high strength, can bear larger variable load, and improve the structural integrity and rut resistance 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, 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. The reinforcing section 14 is simple and convenient to construct, the weak connection position of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively enhanced, and the structural integrity and the local water-proof capacity of the pavement are improved.
An adhesive layer 15 is arranged between the reuse layer 8 and the MS-2 type micro-surfacing layer 9. The adhesion effect between the reuse layer 8 and the MS-2 type micro-surfacing layer 9 is improved, and the pavement integrity is improved.
The reuse 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 early strength agent according to a certain proportion. The reuse layer effectively utilizes asphalt mixture with the grain diameter of 5.0-10.0 mm in the original pavement broken grains, and simultaneously uses limestone powder to replace natural fine sand, so that the prepared pasty mixture has good performance, the cost of micro-surfacing can be greatly reduced, and the pavement broken grain is economical and environment-friendly.
The first filler adopts a polymer material composed 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. Through micro-drilling grouting and micro-drilling high polymer grouting, the bearing capacity and the rut resistance of the repaired pavement are improved, and the integrity of the repaired pavement with the original pavement and the roadbed is enhanced.
The construction method of the ultra-wide ultra-deep rut micro-surfacing repair structure comprises the following steps:
1) And (3) track excavation area construction: determining the excavation width and depth of a rut excavation area according to rut sizes, if the rut width is L, the depth is H, the width of a left rut flange is L1, the width of a right rut flange is L2, the excavation width of a first excavation groove (1) is L+2L1+2L2, the depth is 0.5H, the excavation width of a second excavation groove (2) is L+L1+L2, the depth is 0.5H, the excavation width of a third excavation groove (3) is L, and the depth is 0.5H;
2) Micro-drilling is carried out on the pavement structure layer (22) below the third digging groove (3) to form a first grouting hole (4), the depth of the drilled pavement base layer (16) reaches 3-5d, and the micro-drilling distance is 3-5d, wherein d is the diameter of the micro-drilling hole;
3) Preparing special resin (such as epoxy resin) in advance, adding a proper amount of catalyst hardening agent (such as cationic initiator), polymerizing the resin to form a high polymer material without accurate proportioning, then placing a grouting pipe into a first grouting hole (4) of a third excavated groove (3), and grouting the micro-drilled high polymer to form a first filler (5) after installing an injection cap;
4) Micro-drilling the pavement structure layers (22) below the two sides of the second digging groove (2) to form second grouting holes (6), deep drilling to the bottom of the pavement structure layers (22), wherein the micro-drilling intervals are 5-7d, d are the micro-drilling diameters, and if the intervals are insufficient, at least two rows of drilling holes are formed;
5) Preparing cement slurry, placing a grouting pipe into a second grouting hole (6) of the second excavated groove (2) and installing an injection cap, and then performing micro-drilling grouting to form a second filler (7);
6) Paving double-layer steel wire grids (11) at the bottom of the third digging groove (3), paving single-layer steel wire grids (12) at the bottoms of two sides of the second digging groove (2), overlapping the single-layer steel wire grids (12) and the double-layer steel wire grids (11), and fixing the other side of the single-layer steel wire grids (12) by using micro anchor rods (13) arranged on a pavement structural layer (22);
7) Crushing the pavement fragments excavated in the rutting excavation area, screening 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 for later use
8) Mixing and stirring 10% -20% of chips and 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 with the particle size of 5.0-10.0 mm in pavement broken particles to form a paste backfill mixture;
9) Paving the prepared slurry backfill mixture into a backfill track excavation area to form a crushed pavement recycling layer (8) with the thickness of 0.75H, wherein the crushed pavement recycling layer has certain self-tightness;
10 The strength of the recycling layer (8) of the crushed pavement reaches 70%, surface roughening is carried out, then a bonding layer (15) is constructed, and an MS-2 micro-surfacing layer (9) is constructed and filled above the bonding layer (15) with the thickness of 0.25H;
11 Manufacturing a reinforcing section (14) component in advance, and arranging a steel bar (20) at one end into a pavement structure layer (22) at the inflection points of the first digging groove (1) and the second digging groove (2), and arranging a steel bar (20) at the other end into an MS-2 micro surfacing layer (9);
12 Asphalt mixture with the particle diameter of 5.0-10.0 mm in the pavement broken particles is mixed with a proper amount of stone dust, emulsified asphalt, water and additives 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, the MS-3 type micro-surfacing layer (10) is constructed and filled above the MS-2 type micro-surfacing layer (9), the thickness is 0.5H, and finally the construction of the ultra-wide ultra-deep rut micro-surfacing repair 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 rut resistance of the repaired pavement are improved, the integrity of the repaired pavement with the original pavement 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 crushed surface recycling layer effectively utilizes asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement waste material, and simultaneously uses limestone powder to replace natural fine sand, so that the prepared pasty mixture has good performance, the cost of micro-surfacing can be greatly reduced, and the method is economical and environment-friendly; in addition, the proper amount of scrap tires are added in the reuse layer, so that traffic impact load of the road surface can be effectively buffered and absorbed, and the service life of the repairing structure at the ultra-wide and ultra-deep rut micro-surfacing can be prolonged.
3. According to the invention, through setting the transition from the MS-2 micro-surfacing layer to the MS-3 micro-surfacing layer, the anti-scattering capability of the micro-surfacing can be improved, meanwhile, the road noise is obviously reduced, and in addition, the connection reinforcing section is arranged, so that the connection weakness of the MS-2 micro-surfacing layer and the MS-3 micro-surfacing layer is effectively enhanced, and the structural integrity and the local water-proof capability of the road are improved.
4. The micro-anchor rod and the steel wire grid provided by the invention have the advantages of high strength, corrosion resistance, convenience in construction, effective load distribution, capability of bearing larger variable load and improvement of the structural integrity and rut resistance of the pavement.
5. According to the invention, the asphalt mixture with the particle size of 5.0-10.0 mm in the original pavement waste material is used for preparing the MS-3 micro surfacing asphalt mixture, the asphalt mixture recovered from the pavement waste material is fully utilized, and the economic and environmental benefits are obvious.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications and the like made on the basis of the present invention to solve the substantially same technical problems and achieve the substantially same technical effects are included in the scope of the present invention.
Claims (8)
1. The construction method of the ultra-wide ultra-deep rutting micro-surfacing repair structure is characterized in that the ultra-wide ultra-deep rutting micro-surfacing repair structure comprises a first digging groove, a second digging groove and a third digging groove which are sequentially distributed from top to bottom, wherein the first digging groove, the second digging groove and the third digging groove are in a ladder shape, the bottom of the third digging 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 digging 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 first digging groove from bottom; the construction method comprises the following steps:
1) And (3) track excavation area construction: determining the excavation width and depth of a rut excavation area according to rut sizes, wherein if the rut width is L, the depth is H, the width of a left rut flange is L1, the width of a right rut flange is L2, the excavation width of a first excavation groove is L+2L1+2L2, 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 the pavement structure layer below the third digging groove to form a first grouting hole, wherein the depth of the drilled pavement base layer reaches 3-5d, and the distance between the micro-drilling holes is 3-5d, and d is the diameter of the micro-drilling holes;
3) Preparing special resin in advance, doping catalyst hardening agent, then placing a grouting pipe into a first grouting hole of a third excavated groove, installing an injection cap, and grouting micro-drilling high polymer to form a first filler;
4) Micro-drilling the pavement structure layer below the two sides of the second digging groove to form a second grouting hole, deep drilling the second grouting hole to the bottom of the pavement structure layer, wherein the micro-drilling distance is 5-7d, and d is the diameter of the micro-drilling hole;
5) Preparing cement slurry, placing a grouting pipe into a second grouting hole of a second excavated groove, installing an injection cap, and performing micro-drilling grouting to form a second filler;
6) Paving double-layer steel wire grids at the bottoms of the third digging grooves, paving single-layer steel wire grids at the bottoms of two sides of the second digging grooves, overlapping the single-layer steel wire grids with the double-layer steel wire grids, and fixing the other side of the single-layer steel wire grids by using micro anchor rods arranged on a pavement structure layer;
7) Crushing the pavement fragments excavated in the rutting excavation area, screening out 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 asphalt mixture in crushed pavement particles with the particle size of 1.0-5.0 mm according to the proportion of 10-20% of the crushed pavement particles 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 to form a pasty backfill mixture;
9) Paving the prepared slurry backfill mixture into a backfill track excavation area to form a crushed pavement recycling layer with the thickness of 0.75H, wherein the crushed pavement recycling layer has certain self-tightness;
10 After the strength of the recycled layer of the crushed pavement reaches 70%, carrying out surface roughening, then constructing a bonding layer, and then constructing and filling an MS-2 micro-surfacing layer above the bonding layer, wherein the thickness is 0.25H;
11 Manufacturing a reinforcing section member in advance, and arranging a steel bar at one end into a pavement structure layer at the inflection points of the first digging groove and the second digging groove, and arranging a steel bar at the other end into an MS-2 micro-surfacing layer;
12 Asphalt mixture with the particle diameter of 5.0-10.0 mm in the pavement broken particles is mixed with a proper amount of stone dust, emulsified asphalt, water and additives to prepare a regenerated emulsified asphalt slurry mixture for constructing an MS-3 type micro surfacing layer;
13 After the reinforcing section is installed, an MS-3 type micro-surfacing layer is paved and filled above the MS-2 type micro-surfacing layer, the thickness is 0.5H, and finally the construction of an ultra-wide ultra-deep rut micro-surfacing repair structure is completed.
2. The construction method according to claim 1, wherein: and a double-layer steel wire grid is arranged at the bottom of the third digging groove.
3. The construction method according to claim 1, wherein: the second digging groove is provided with a single-layer steel wire grid.
4. A construction method according to claim 3, wherein: and micro-anchor rods are arranged on two sides of the second excavated groove and connected with the single-layer steel wire grid.
5. The construction method according to claim 1, wherein: the reinforced section is arranged between the MS-2 type micro-surfacing layer and the MS-3 type micro-surfacing layer and consists of a reinforced steel wire grid, waterproof cloth and steel bars, wherein the waterproof cloth is arranged on the reinforced steel wire grid, and the steel bars are arranged on two sides of the reinforced steel wire grid.
6. The construction method 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 construction method according to claim 1, wherein: the reuse layer consists 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 construction method according to claim 1, wherein: the first filler adopts a polymer material composed 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.
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| CN114753225A (en) | 2022-07-15 |
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