CN113564996A - Construction method for directly laying asphalt based on cement pavement - Google Patents
Construction method for directly laying asphalt based on cement pavement Download PDFInfo
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- CN113564996A CN113564996A CN202110657987.4A CN202110657987A CN113564996A CN 113564996 A CN113564996 A CN 113564996A CN 202110657987 A CN202110657987 A CN 202110657987A CN 113564996 A CN113564996 A CN 113564996A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 60
- 239000004568 cement Substances 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000004567 concrete Substances 0.000 claims abstract description 180
- 238000000034 method Methods 0.000 claims abstract description 56
- 238000003801 milling Methods 0.000 claims abstract description 37
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 29
- 201000010099 disease Diseases 0.000 claims abstract description 22
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims description 62
- 239000000565 sealant Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 230000008602 contraction Effects 0.000 claims description 12
- 230000007547 defect Effects 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 25
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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
- E01C23/0906—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 cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges
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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
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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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
-
- 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
- E01C23/12—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
Abstract
The invention provides a construction method for directly paving asphalt on the basis of a cement pavement, which comprises the following steps of firstly, lifting the old cement concrete pavement and milling the pavement; step two, disease treatment is carried out on the old cement concrete pavement, the diseases of the cement concrete pavement comprise pavement cracks, plate settlement and hole repairing, and when various types of the diseases of the cement concrete pavement exist in the unit slab block, the diseases are treated according to a full-depth patching method of a patching method; and step three, paving asphalt concrete on the repaired old cement concrete pavement. The method can solve the problems of arch camber of the asphalt concrete pavement and cracking of a new asphalt concrete pavement caused by the original concrete expansion joint after the asphalt is directly paved on the original cement concrete pavement, and the paved asphalt pavement has longer service life and higher stability.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a construction method for directly paving asphalt on a cement road surface.
Background
At present, cement pavements laid in the past can be seen everywhere in China, although the cement pavements are almost complete after long-time use and maintenance, the height of the pavements is severe, repair traces can be seen everywhere, meanwhile, road pavements are not uniformly settled due to cracks, pits and plates, and the phenomena of large-area crazing, cracks and road settlement caused by the poor quality control of road building materials during the construction of the concrete pavements are caused, when asphalt concrete needs to be paved above the original cement pavements, the problems of settlement and dislocation of the cracks, pits and plates existing on the original pavements are mainly caused, and the problems easily cause the phenomena of arching of the newly laid asphalt concrete pavements, cracking of the new asphalt concrete pavements caused by the rising of underground water vapor of the original concrete base layer when the asphalt concrete pavements are paved, and in order to prevent the original concrete pavements and the ground water from permeating into the base layer to influence the base layer strength, the above disease problem needs to be dealt with.
Disclosure of Invention
In order to solve certain or some technical problems in the prior art, the invention provides a construction method for directly laying asphalt on the basis of a cement road surface, which can solve the problems that the asphalt concrete road surface is arched after the asphalt is directly laid on the original cement concrete road surface, the original concrete expansion joint causes the cracking of the new asphalt concrete road surface and the like, and the laid asphalt road surface has longer service life and higher stability.
In order to solve the above-mentioned existing technical problem, the invention adopts the following scheme:
a construction method for directly laying asphalt based on cement pavement comprises
The method comprises the following steps of firstly, lifting an old cement concrete pavement, and milling the pavement: when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by 10CM-15CM, mechanically napping the pavement by using a milling machine, when the elevation of the old concrete pavement is higher than the elevation of the finished pavement by more than 15CM, pouring C30 concrete to lift the pavement, after the concrete pavement is initially set, mechanically napping the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 10CM and more than 5CM, milling and digging the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 5CM and even higher than the elevation of the finished pavement, crushing and digging out the original concrete plate, and mechanically napping the pavement by using the milling machine after pouring the concrete base plate again, so that the final elevation of the concrete pavement is completely lower than the elevation of the finished pavement by 10 +/-1 CM and then finishing the operation;
step two, carrying out disease treatment on the old cement concrete pavement: the mud concrete pavement diseases comprise pavement cracks, plate settlement and hole repairing, and when various mud concrete pavement disease types exist in the unit plate blocks, the mud concrete pavement diseases are treated according to a full-depth patching method of a patching method;
and step three, paving asphalt concrete on the repaired old cement concrete pavement.
Further, the pavement cracks comprise contraction joints, expansion joints, longitudinal joints and road joints, and the method for treating the cracks of the old cement concrete pavement comprises the following steps:
s1, replacing all the broken plates with concentrated cracks in the original mud concrete pavement;
s2, using a non-concentrated crack plate, removing impurities in cracks of the pavement, and refilling filler, wherein the cracks of the pavement are divided into slight cracks, medium cracks and serious cracks according to the width, the slight cracks are crack defects with the width of less than 3mm in the pavement, the medium cracks are crack defects with the width of 3-15 mm in the pavement, and the serious cracks are crack defects with the width of more than 15mm in the pavement;
and S3, repairing the cracks in the same plate by adopting a thin layer repairing method.
Further, the method for repairing the slight crack comprises the following steps: a1, cutting along the crack by a cutting machine, widening along the crack into a groove with the depth of 1.5-2.0 CM, wherein the depth of the groove can not exceed the thickness of 2/3 plates to the maximum extent; a2, adopting SBS modified asphalt pouring sealant to perform groove pouring, keeping the groove pouring level with the original road surface, and performing vibration tamping treatment; a3, after the crack pouring material is solidified, milling and milling the cement concrete pavement; a4, coating SBS modified asphalt pouring sealant on two sides of the slight crack, and then paving the anti-crack paste along the cutting crack.
Furthermore, the coating width of the SBS modified asphalt pouring sealant on two sides of the cutting seam of the slight crack is 35-40cm, the width of the anti-crack paste is 34-40cm, and the central line of the anti-crack paste is aligned to the center of the crack.
Further, the method for repairing the medium fracture comprises the following steps: b1, cutting the two sides of the crack, wherein the cutting width is not less than 20cm, the cutting crack needs to be parallel to the contraction joint, the cutting depth is 10cm, B2, C30 concrete is poured in the groove and is vibrated to be compact, and after B3 and the concrete in the groove meet the strength requirement, milling and planning the cement concrete pavement; b4, coating SBS modified asphalt pouring sealant on two sides of the joint of the medium crack, then paving an anti-crack paste along the cutting crack, wherein the width of the anti-crack paste is 34-40cm, and the central line of the paved anti-crack paste is aligned to the center of the cutting crack.
Further, the severe cracks are repaired by adopting a digging and repairing method or a full-depth block repairing method.
The specific implementation mode of the full-depth block filling method by the digging and filling method comprises the following steps:
firstly, for the serious crack plate needing to be dismantled, a water horse fence is arranged, and a reasonable number of warning slogans are arranged.
Secondly, drawing a line along the position of the contraction joint, cutting the contraction joint in full depth, and cutting a 5 cm-deep joint along the position 4cm inside.
And thirdly, severe crack plates (one plate is used as a minimum unit) are chiseled, and the base layer, the adjacent face plate and the road shoulder cannot be damaged in the process of crushing and removing the old concrete. And (3) crushing the pavement concrete blocks by using a 120-model pick head machine, a pneumatic pick and the like, roughening the vertical joint surface of the edge old concrete pavement, and cleaning the fragments and dust at the bottom and the wall of the excavated groove once to ensure that the inside of the groove is clean.
Fourthly, paving the phi 8@200 reinforcing mesh sheet at the bottom of the excavated surface, then pouring C30 concrete, paving and leveling the pavement concrete manually, keeping the pavement concrete level with the original concrete surface layer, uniformly vibrating by using an inserted vibrating rod after the pavement concrete is roughly leveled, and slowly and uniformly reciprocating twice by using a vibrating flat beam to enable the surface of newly poured concrete to be starched, so as to ensure the surface of the concrete to be level, and manually leveling is assisted during vibrating.
And fifthly, covering with a thin film in time after the concrete is poured, and covering with a felt for maintenance within 12 hours, wherein the felt is always in a wet state. The water horse enclosure is not removed before traffic is opened, so that safety accidents of vehicle personnel are prevented from happening and the concrete structure is prevented from being damaged. And (5) after the concrete is poured, regularly maintaining, and developing traffic after the concrete reaches the strength requirement for about 7 days.
Further, the method for treating the diseases of the pot holes and the slab staggering comprises the following steps:
c1, when repairing individual pits, removing sundries in the pits, filling the pits with SBS modified asphalt crack pouring glue, brushing the SBS modified asphalt crack pouring glue around the pits and fully sticking the crack resisting paste;
c2, when more pothole department was mended, at first to the pothole lofting cutting to carry out artifical chisel hair with the smooth surface in the cutting face, the figure of cutting area should be parallel or perpendicular with the way central line, the degree of depth of cutting is greater than 10cm, then with C30 concrete filling tank in, the vibration is closely knit, keeps flushing with original concrete surface course, adopts the film to cover after having pour the concrete at last and maintains.
Furthermore, the coating range of the SBS modified asphalt crack pouring glue around the pot holes is 40 CM-40 CM square or round.
Further, the repair method for plate sedimentation comprises the following steps:
d1, when the height difference of the plate settlement is less than or equal to 10mm, adopting manual leveling, extending from the highest point of the staggered platform to the periphery, and leveling by using a three-meter ruler for edge grinding until two adjacent plates are leveled;
d2, when the height difference of plate settlement is larger than or equal to 10mm, chiseling the lowest sinking plate of the slab staggering by 2-3 cm, calculating the repairing length according to the height of the slab staggering divided by 1% of the slope, paving a phi 8@200 steel bar net, pouring C30 concrete, and after the concrete is poured, adopting a film to cover for maintenance.
Further, the concrete base layer plate poured again sequentially comprises a cement stabilized macadam base layer and a 200-thick C30 concrete base layer plate from bottom to top.
Compared with the prior art, the invention has the beneficial effects that:
the method has the advantages that the phenomena that the asphalt concrete pavement is arched after the old cement concrete pavement and the defects thereof are treated and then the asphalt concrete is paved, the phenomena that the asphalt concrete pavement is arched after the original cement concrete pavement is directly paved with asphalt, the original concrete expansion joint causes the new asphalt concrete pavement to crack and the like can be solved, the service life of the paved asphalt pavement is longer, the stability is higher, and particularly, the phenomena that the newly paved asphalt concrete pavement is arched due to the rising of underground water vapor of the original concrete base layer, the new asphalt concrete pavement cracks due to the original concrete expansion joint and the like can be effectively reduced after the original crack is grouted and the crack resistance paste is matched for repairing.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in figure 1, a construction method for directly laying asphalt based on a cement pavement comprises
The method comprises the following steps of firstly, lifting an old cement concrete pavement, and milling the pavement: when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by 10CM-15CM, mechanically napping the pavement by using a milling machine, when the elevation of the old concrete pavement is higher than the elevation of the finished pavement by more than 15CM, pouring C30 concrete to lift the pavement, after the concrete pavement is initially set, mechanically napping the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 10CM and more than 5CM, milling and digging the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 5CM and even higher than the elevation of the finished pavement, crushing and digging out the original concrete plate, and mechanically napping the pavement by using the milling machine after pouring the concrete base plate again, so that the final elevation of the concrete pavement is completely lower than the elevation of the finished pavement by 10 +/-1 CM and then finishing the operation; the concrete base layer plate poured again sequentially comprises a cement stabilized macadam base layer and a C30 concrete base layer plate with the thickness of 200 from bottom to top;
step two, carrying out disease treatment on the old cement concrete pavement: the mud concrete pavement diseases comprise pavement cracks, plate settlement and hole repairing, and when various mud concrete pavement disease types exist in the unit plate blocks, the mud concrete pavement diseases are treated according to a full-depth patching method of a patching method;
and step three, paving asphalt concrete on the repaired old cement concrete pavement.
Before asphalt concrete is paved, the original cement concrete pavement is comprehensively treated, so that the root cause of reflection cracks is reduced; replacing all the broken plates of the original pavement, including whole plate breaking, plate corner breaking, plate edge breaking and the like, removing sundries in a shrinkage joint, an expansion joint and a longitudinal joint of the pavement, pouring filling materials again, repairing pits, staggered platforms and the like; for some non-structural damages, such as surface peeling, exposed bones, peeling, pitted surface and the like, because the damage only affects the driving comfort of the original road surface, when the old road is reconstructed and the base layer is made on the old concrete road surface, the damage in the forms only does not specially treat the surface and the defects.
The construction method for lifting and milling the old cement concrete pavement comprises the following specific steps:
firstly, the old concrete pavement is lower than the finished pavement elevation by 10-15 CM, and the pavement is napped.
1. The construction section is provided with a warning sign, a water horse fence and the like.
2. And (4) mechanically roughening the road surface by using a milling machine.
3. Removing the enclosure and opening the traffic.
And secondly, pouring C30 concrete to lift the pavement when the elevation of the old concrete pavement is lower than that of the finished pavement by more than 15 CM.
1. The construction section is provided with a warning sign, a water horse fence and the like.
2. And (5) performing road surface lifting operation, and pouring C30 concrete.
3. And (5) conducting elevation retest to ensure that the elevation of the concrete pouring surface is 10CM lower than that of the finished asphalt concrete pavement, and vibrating the concrete to be compact.
4. And after the concrete pavement is initially set, roughening the surface.
5. Removing the enclosure and opening the traffic.
Thirdly, the old concrete pavement is lower than the finished pavement, the elevation of the finished pavement is less than 10CM and more than 5CM, and pavement milling operation is carried out.
1. The construction section is provided with a warning sign, a water horse fence and the like.
2. And measuring the elevation according to the original pavement, and ensuring that the elevation of the milled and planed concrete pavement is 10CM lower than the elevation of the finished pavement by combining the elevation of the finished asphalt concrete pavement with the design requirement. After confirming the thickness to be milled, the milling machine is used for milling the road surface.
3. And cleaning the milled pavement by using a sweeper, retesting the elevation, and if the elevation does not meet the elevation requirement, retesting the milling and the elevation again so as to circulate. And finishing the working procedure until the elevation of the milled concrete pavement is 10CM lower than the elevation of the finished asphalt concrete pavement.
4. Removing the enclosure and opening the traffic.
Fourthly, the old concrete pavement is lower than the finished pavement, the elevation of the finished pavement is less than 5CM, even higher than the finished pavement, the original concrete plate is broken and dug out, and the concrete base plate is poured again.
1. The construction section is provided with a warning sign, a water horse fence and the like.
2. And determining the elevation according to the original pavement, and confirming the excavation depth of the chiseled concrete slab by combining the elevation of the finished asphalt concrete pavement with the design requirement.
3. And pouring the C30 concrete base plate again, wherein the node is composed of a cement stabilized macadam base layer, a C30 concrete base plate with the thickness of 200 and the upper part according to the method from bottom to top.
4. After the concrete pavement is initially set, the surface is subjected to galling treatment and periodic maintenance for seven days.
5. Removing enclosure and opening traffic
In a further improvement, the pavement cracks comprise contraction joints, expansion joints, longitudinal joints and road joints, and the method for treating the cracks of the old cement concrete pavement comprises the following steps:
s1, replacing all the broken plates with concentrated cracks in the original mud concrete pavement;
s2, using a non-concentrated crack plate, removing impurities in cracks of the pavement, and refilling filler, wherein the cracks of the pavement are divided into slight cracks, medium cracks and serious cracks according to the width, the slight cracks are crack defects with the width of less than 3mm in the pavement, the medium cracks are crack defects with the width of 3-15 mm in the pavement, and the serious cracks are crack defects with the width of more than 15mm in the pavement;
and S3, repairing the cracks in the same plate by adopting a thin layer repairing method.
When the original road joint of the road is treated, a cutting machine is used for cutting the contraction joint, a high-pressure air gun is used for cleaning the joint, the cleaning is thorough, no other sundries exist, SBS modified asphalt crack pouring glue is used for performing crack pouring treatment, the crack pouring is saturated, the crack pouring is finished and leveled, and the crack pouring and the original road surface are kept in the same horizontal plane. And (4) treating the road base layer after the crack pouring material is cured. Because the pavement needs milling and planing treatment, the surface is rough and uneven, and the SBS modified asphalt pouring sealant is coated at the expansion joint for one time before the anti-crack paste is pasted, so that the binding force of the self-adhesive anti-crack paste is increased. The width of the anti-crack paste is 34CM, road surface scraps and dust within the width range of 40CM around the expansion joint are cleaned, the SBS modified asphalt pouring sealant with the width of 40CM is coated, and after the completion, the anti-crack paste with the width of 34CM is spread along the expansion joint. Paving the anti-crack paste with the central line aligned with the expansion joint. Wherein the usage amount of the SBS modified asphalt pouring sealant for painting the contraction joint is 3.75kg/m 2.
In a further improvement, the method for repairing a slight crack comprises: a1, cutting along the crack by a cutting machine, widening along the crack into a groove with the depth of 1.5-2.0 CM, wherein the depth of the groove can not exceed the thickness of 2/3 plates to the maximum extent; a2, adopting SBS modified asphalt pouring sealant to perform groove pouring, keeping the groove pouring level with the original road surface, and performing vibration tamping treatment; a3, after the crack pouring material is solidified, milling and milling the cement concrete pavement; a4, coating SBS modified asphalt pouring sealant on two sides of the slight crack, and then paving an anti-crack sticker along the cutting crack; the coating width of the SBS modified asphalt pouring sealant on two sides of the cutting seam of the slight crack is 35-40cm, the width of the anti-crack paste is 34-40cm, and the central line of the anti-crack paste is aligned to the center of the crack. The method comprises the following specific steps:
safety sign placement and water horse maintenance
Secondly, cutting along the crack by using a cutting machine, widening along the crack into a groove with the depth of 1.5-2.0 CM, wherein the groove depth can be determined according to the crack depth and can not exceed the thickness of 2/3 boards to the maximum extent.
And thirdly, manually chiseling and removing concrete scraps left in the groove.
Fourthly, adopting SBS modified asphalt pouring sealant to perform groove pouring, keeping the groove pouring level with the original road surface, and performing vibration tamping treatment.
Fifthly, treating the road base layer after the crack pouring material is cured. Because the pavement needs to be milled and planed, the surface is rough and uneven, and the SBS modified asphalt pouring sealant is coated at the crack position for one time before the anti-crack paste is pasted, so that the binding force of the self-adhesive anti-crack paste is increased. The width of the anti-crack paste is 34CM, road surface scraps and dust within the width range of 40CM around the crack are cleaned, 40CM wide SBS modified asphalt pouring sealant is coated, and after the completion, 34CM wide anti-crack paste is pasted along the crack. And paving the crack-resistant paste, wherein the central line of the crack-resistant paste is aligned with the crack for paving. Wherein the usage amount of the SBS modified asphalt pouring sealant for painting the cracks of the pavement is 3.75kg/m 2.
Removing enclosure and opening traffic
In a further improvement, the method for repairing a medium fracture comprises: b1, cutting the two sides of the crack, wherein the cutting width is not less than 20cm, the cutting crack needs to be parallel to the contraction joint, the cutting depth is 10cm, B2, C30 concrete is poured in the groove and is vibrated to be compact, and after B3 and the concrete in the groove meet the strength requirement, milling and planning the cement concrete pavement; b4, coating SBS modified asphalt pouring sealant on two sides of the joint of the medium crack, then paving an anti-crack paste along the cutting crack, wherein the width of the anti-crack paste is 34-40cm, and the central line of the paved anti-crack paste is aligned to the center of the cutting crack. The method comprises the following specific steps:
cutting seams at two sides of the crack, wherein the cutting width is not less than 20cm, the cutting seams are parallel to the contraction seams, and the cutting depth is 10 cm.
And secondly, manually chiseling and breaking the concrete in the groove after cutting, chiseling and removing loose concrete fragments, surface dust and bare stones.
Thirdly, C30 concrete is poured in the groove and is vibrated to be compact.
Fourthly, after the concrete in the groove meets the strength requirement, the road base layer is processed. Before the anti-crack paste is pasted, the crack is coated with SBS modified asphalt pouring sealant for one time so as to increase the binding force of the self-adhesive anti-crack paste. The width of the anti-crack paste is 34CM, road surface scraps and dust in the width range of 40CM around the crack are cleaned, 40CM wide SBS modified asphalt pouring sealant is coated, and after the completion, 34CM wide anti-crack paste is spread along the crack. And paving the crack-resistant paste, wherein the central line of the crack-resistant paste is aligned with the crack for paving. Wherein the usage amount of the SBS modified asphalt pouring sealant for painting the cracks of the pavement is 3.75kg/m 2.
If the cracks are concentrated, and a plurality of cracks are concentrated in the same plate, the thin layer repairing method can be adopted for repairing.
In a further improvement, the severe cracks are repaired by adopting a digging repair method or a full-depth patch method.
The specific implementation mode of the full-depth block filling method by the digging and filling method comprises the following steps:
firstly, for the serious crack plate needing to be dismantled, a water horse fence is arranged, and a reasonable number of warning slogans are arranged.
Secondly, drawing a line along the position of the contraction joint, cutting the contraction joint in full depth, and cutting a 5 cm-deep joint along the position 4cm inside.
And thirdly, severe crack plates (one plate is used as a minimum unit) are chiseled, and the base layer, the adjacent face plate and the road shoulder cannot be damaged in the process of crushing and removing the old concrete. And (3) crushing the pavement concrete blocks by using a 120-model pick head machine, a pneumatic pick and the like, roughening the vertical joint surface of the edge old concrete pavement, and cleaning the fragments and dust at the bottom and the wall of the excavated groove once to ensure that the inside of the groove is clean.
Fourthly, paving the phi 8@200 reinforcing mesh sheet at the bottom of the excavated surface, then pouring C30 concrete, paving and leveling the pavement concrete manually, keeping the pavement concrete level with the original concrete surface layer, uniformly vibrating by using an inserted vibrating rod after the pavement concrete is roughly leveled, and slowly and uniformly reciprocating twice by using a vibrating flat beam to enable the surface of newly poured concrete to be starched, so as to ensure the surface of the concrete to be level, and manually leveling is assisted during vibrating.
And fifthly, covering with a thin film in time after the concrete is poured, and covering with a felt for maintenance within 12 hours, wherein the felt is always in a wet state. The water horse enclosure is not removed before traffic is opened, so that safety accidents of vehicle personnel are prevented from happening and the concrete structure is prevented from being damaged. And (5) after the concrete is poured, regularly maintaining, and developing traffic after the concrete reaches the strength requirement for about 7 days.
In a further improvement, the method for treating the diseases of the pits and the slab staggering comprises the following steps:
c1, when repairing individual pits, removing sundries in the pits, filling the pits with SBS modified asphalt crack pouring glue, brushing the SBS modified asphalt crack pouring glue around the pits and fully sticking the crack resisting paste;
c2, when more pothole department was mended, at first to the pothole lofting cutting to carry out artifical chisel hair with the smooth surface in the cutting face, the figure of cutting area should be parallel or perpendicular with the way central line, the degree of depth of cutting is greater than 10cm, then with C30 concrete filling tank in, the vibration is closely knit, keeps flushing with original concrete surface course, adopts the film to cover after having pour the concrete at last and maintains.
The repairing method of the individual pit hole comprises the following steps: and removing impurities in the holes, filling the holes with SBS modified asphalt crack pouring glue, wherein the periphery of each hole is in a boundary range of 40 CM-40 CM square, and the SBS modified asphalt crack pouring glue is coated in the boundary range and is fully adhered with the crack resistance paste. Wherein the usage amount of the SBS modified asphalt pouring sealant for painting the cracks of the pavement is 3.75kg/m 2.
The repairing method for more pits comprises the following steps:
firstly, lofting and cutting the pits, wherein the graph of the cutting area is parallel to or vertical to the central line of the road.
Secondly, the cutting depth is more than 10cm (considering the excavation depth according to the actual situation on site), and the smooth surface in the cutting surface is manually roughened.
And thirdly, the pneumatic pick breaks the cutting surface to the cutting depth and cleans concrete chips and dust.
Fourthly, C30 concrete is filled into the groove, is vibrated to be compact and is kept to be flush with the original concrete surface (concrete construction process and maintenance mode refer to concrete construction process and maintenance in severe cracks)
And fifthly, covering with a thin film in time after the concrete is poured, and covering with a felt for maintenance within 12 hours, wherein the felt is always in a wet state. The water horse enclosure is not removed before traffic is opened, so that safety accidents of vehicle personnel are prevented from happening and the concrete structure is prevented from being damaged. And (5) after the concrete is poured, regularly maintaining, and developing traffic after the concrete reaches the strength requirement for about 7 days.
In a further improvement, the coating range of the SBS modified asphalt crack pouring glue around the pot holes is 40CM by 40CM square or round.
In a further improvement, the repair method for plate sedimentation comprises the following steps:
d1, when the height difference of the plate settlement is less than or equal to 10mm, adopting manual leveling, extending from the highest point of the staggered platform to the periphery, and leveling by using a three-meter ruler for edge grinding until two adjacent plates are leveled;
d2, when the height difference of plate settlement is larger than or equal to 10mm, chiseling the lowest sinking plate of the slab staggering by 2-3 cm, calculating the repairing length according to the height of the slab staggering divided by 1% of the slope, paving a phi 8@200 steel bar net, pouring C30 concrete, and after the concrete is poured, adopting a film to cover for maintenance.
1.1 the concrete base layer plate poured again sequentially comprises a cement stabilized macadam base layer and a 200-thick C30 concrete base layer plate from bottom to top.
When the plates are staggered and the same plate is treated by a plurality of cracks and other sporadic diseases,
dislocation treatment with height difference less than or equal to 10mm
Firstly, manual leveling is adopted, the leveling is expanded from the highest point of the dislocation to the periphery, and the edge grinding is performed by using a three-meter ruler until two adjacent boards are leveled. And secondly, removing sundries in the joint after grinding. Removing enclosure and opening traffic
Treatment for serious dislocation with height difference of more than or equal to 10mm
Firstly, chiseling the depth of 2-3 cm of the lowest sinking plate of the slab staggering, and calculating the repairing length according to the height of the slab staggering divided by the gradient (1%). And secondly, chiseling the surface to remove impurities and dust. Thirdly, paving a phi 8@200 steel bar mesh, pouring C30 concrete, covering the concrete in time by using a thin film after the concrete is poured, and then covering a felt for maintenance within 12 hours to use the mesh in a wet state as a standard all the time. The water horse enclosure is not removed before traffic is opened, so that safety accidents of vehicle personnel are prevented from happening and the concrete structure is prevented from being damaged. And fourthly, after the concrete is poured, regularly maintaining, and developing traffic after the strength requirement is met for about 7 days.
When the unit plate block is encountered, a plurality of road disease types are all according to severe cracks.
When the obvious settlement plate is treated, because the service life of the road is longer, part of the road plates have obvious settlement, and the structure of the road is seriously damaged, the treatment method adopts the whole plate chiseling treatment, the settlement plate is crushed, and then the C30 pouring concrete is carried out again, and the concrete steps are as follows:
firstly, the water horse encloses the fender, sets up warning sign.
Secondly, manual road cutting is carried out along the settlement plate.
And thirdly, the 120-type pickaxe machine crushes the road to the base layer part.
And fourthly, placing the phi 8@200 steel bar net piece and paving the C30 concrete again.
The general cement concrete pavement renovation project mainly has the problems of road pavement cracks, pits, uneven settlement of plates and the like, and the phenomena of large-area cracks, cracks and road settlement caused by the poor control of the quality of road building materials during the concrete pavement construction. Therefore, the construction key point of the engineering needs to be strictly processed in the aspect of road damage, when the road damage is processed, the principle of firstly lifting the road, milling the road and then processing the road damage is mainly adopted, the construction process is confirmed according to the height difference measured on site by the lifting and milling of the road, the road sealing construction is carried out one by one according to the progress plan and the construction subareas, the processing of the road damage is the key point and the difficulty point of the whole road engineering, and the speed of the processing of the road damage directly influences the construction of the subsequent pavement structure engineering. The method has the advantages that the phenomena that the asphalt concrete pavement is arched after the old cement concrete pavement and the defects thereof are treated and then the asphalt concrete is paved, the phenomena that the asphalt concrete pavement is arched after the original cement concrete pavement is directly paved with asphalt, the original concrete expansion joint causes the new asphalt concrete pavement to crack and the like can be solved, the service life of the paved asphalt pavement is longer, the stability is higher, and particularly, the phenomena that the newly paved asphalt concrete pavement is arched due to the rising of underground water vapor of the original concrete base layer, the new asphalt concrete pavement cracks due to the original concrete expansion joint and the like can be effectively reduced after the original crack is grouted and the crack resistance paste is matched for repairing.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A construction method for directly paving asphalt on the basis of a cement pavement is characterized by comprising the following steps of: comprises that
The method comprises the following steps of firstly, lifting an old cement concrete pavement, and milling the pavement: when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by 10CM-15CM, mechanically napping the pavement by using a milling machine, when the elevation of the old concrete pavement is higher than the elevation of the finished pavement by more than 15CM, pouring C30 concrete to lift the pavement, after the concrete pavement is initially set, mechanically napping the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 10CM and more than 5CM, milling and digging the pavement by using the milling machine, when the elevation of the old concrete pavement is lower than the elevation of the finished pavement by less than 5CM and even higher than the elevation of the finished pavement, crushing and digging out the original concrete plate, and mechanically napping the pavement by using the milling machine after pouring the concrete base plate again, so that the final elevation of the concrete pavement is completely lower than the elevation of the finished pavement by 10 +/-1 CM and then finishing the operation;
step two, carrying out disease treatment on the old cement concrete pavement: the mud concrete pavement diseases comprise pavement cracks, plate settlement and hole repairing, and when various mud concrete pavement disease types exist in the unit plate blocks, the mud concrete pavement diseases are treated according to a full-depth patching method of a patching method;
and step three, paving asphalt concrete on the repaired old cement concrete pavement.
2. The construction method for directly laying asphalt based on cement road surface according to claim 1, characterized in that: the method for treating the cracks of the old cement concrete pavement comprises the following steps:
s1, replacing all the broken plates with concentrated cracks in the original mud concrete pavement;
s2, using a non-concentrated crack plate, removing impurities in cracks of the pavement, and refilling filler, wherein the cracks of the pavement are divided into slight cracks, medium cracks and serious cracks according to the width, the slight cracks are crack defects with the width of less than 3mm in the pavement, the medium cracks are crack defects with the width of 3-15 mm in the pavement, and the serious cracks are crack defects with the width of more than 15mm in the pavement;
and S3, repairing the cracks in the same plate by adopting a thin layer repairing method.
3. The construction method for directly laying asphalt based on cement road surface according to claim 2, characterized in that: the method for repairing the slight crack comprises the following steps: a1, cutting along the crack by a cutting machine, widening along the crack into a groove with the depth of 1.5-2.0 CM, wherein the depth of the groove can not exceed the thickness of 2/3 plates to the maximum extent; a2, adopting SBS modified asphalt pouring sealant to perform groove pouring, keeping the groove pouring level with the original road surface, and performing vibration tamping treatment; a3, after the crack pouring material is solidified, milling and milling the cement concrete pavement; a4, coating SBS modified asphalt pouring sealant on two sides of the slight crack, and then paving the anti-crack paste along the cutting crack.
4. The construction method for directly laying asphalt based on cement road surface according to claim 3, characterized in that: the coating width of the SBS modified asphalt pouring sealant on two sides of the cutting seam of the slight crack is 35-40cm, the width of the anti-crack paste is 34-40cm, and the central line of the anti-crack paste is aligned to the center of the crack.
5. The construction method for directly laying asphalt based on cement road surface according to claim 2, characterized in that: the medium crack repairing method comprises the following steps: b1, cutting the two sides of the crack, wherein the cutting width is not less than 20cm, the cutting crack needs to be parallel to the contraction joint, the cutting depth is 10cm, B2, C30 concrete is poured in the groove and is vibrated to be compact, and after B3 and the concrete in the groove meet the strength requirement, milling and planning the cement concrete pavement; b4, coating SBS modified asphalt pouring sealant on two sides of the joint of the medium crack, then paving an anti-crack paste along the cutting crack, wherein the width of the anti-crack paste is 34-40cm, and the central line of the paved anti-crack paste is aligned to the center of the cutting crack.
6. The construction method for directly laying asphalt based on cement road surface according to claim 2, characterized in that: and repairing the serious cracks by adopting a digging and repairing method or a full-depth block repairing method.
7. The construction method for directly laying asphalt based on cement road surface according to claim 1, characterized in that: the method for treating the diseases of the pits and the slab staggering comprises the following steps:
c1, when repairing individual pits, removing sundries in the pits, filling the pits with SBS modified asphalt crack pouring glue, brushing the SBS modified asphalt crack pouring glue around the pits and fully sticking the crack resisting paste;
c2, when more pothole department was mended, at first to the pothole lofting cutting to carry out artifical chisel hair with the smooth surface in the cutting face, the figure of cutting area should be parallel or perpendicular with the way central line, the degree of depth of cutting is greater than 10cm, then with C30 concrete filling tank in, the vibration is closely knit, keeps flushing with original concrete surface course, adopts the film to cover after having pour the concrete at last and maintains.
8. The construction method for directly laying asphalt based on cement road surface according to claim 7, characterized in that: the coating range of the SBS modified asphalt crack pouring glue around the pot hole is 40CM by 40CM square or round.
9. The construction method for directly laying asphalt based on cement road surface according to claim 1, characterized in that: the plate sedimentation repairing method comprises the following steps:
d1, when the height difference of the plate settlement is less than or equal to 10mm, adopting manual leveling, extending from the highest point of the staggered platform to the periphery, and leveling by using a three-meter ruler for edge grinding until two adjacent plates are leveled;
d2, when the height difference of plate settlement is larger than or equal to 10mm, chiseling the lowest sinking plate of the slab staggering by 2-3 cm, calculating the repairing length according to the height of the slab staggering divided by 1% of the slope, paving a phi 8@200 steel bar net, pouring C30 concrete, and after the concrete is poured, adopting a film to cover for maintenance.
10. The construction method for directly laying asphalt based on cement road surface according to claim 1, characterized in that: the concrete base layer plate poured again sequentially comprises a cement stabilized macadam base layer and a C30 concrete base layer plate with the thickness of 200 from bottom to top.
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