CN113047109A - Milling and re-paving construction process suitable for highway pavement - Google Patents
Milling and re-paving construction process suitable for highway pavement Download PDFInfo
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- CN113047109A CN113047109A CN202110380043.7A CN202110380043A CN113047109A CN 113047109 A CN113047109 A CN 113047109A CN 202110380043 A CN202110380043 A CN 202110380043A CN 113047109 A CN113047109 A CN 113047109A
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
Abstract
The invention discloses a milling and re-paving construction process suitable for a highway pavement, which is a construction process comprising the steps of measuring and setting off → cutting → milling → cleaning → spreading emulsified asphalt → mixing asphalt mixture → transporting asphalt mixture → paving asphalt mixture → rolling → opening traffic, wherein in the paving process of the asphalt mixture, the mixture on site is inspected to ensure that the temperature of the mixture is between 145 and 165 ℃, the speed of a paver is 2.5 to 3.5m/min, the construction and paving temperature is controlled to be between 135 and 160 ℃, and the construction and paving temperature is controlled to be between 140 and 165 ℃ at low temperature; paving thickness is not less than design thickness; according to the test section paving data, the asphalt concrete paving coefficient is 1.18-1.21, the method realizes upgrading and forging of original roads, improves the comfort and road appearance of the roads, solves the problem of damaged sections of the original roads by milling and re-paving the original roads, improves the pavement quality, optimizes the driving conditions, prolongs the service life of the roads and meets the requirement of economic development.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a milling and re-paving construction process suitable for a highway pavement.
Background
The high-speed road is usually an asphalt concrete road, and the asphalt concrete road has the advantages of high strength, good durability, long service life, simple construction, convenient material acquisition, low manufacturing cost and the like and is widely applied to road engineering pavements. However, due to the careless omission of links such as design, construction and maintenance and the addition of overload and over-limit vehicles, the defects of broken plates, asphalt concrete breakage and the like are generated on the road surface, and the development is very rapid. For the diseases such as asphalt concrete pavement fracture, slab breakage, breakage and the like, the service performances such as the shearing resistance, durability, pavement evenness and the like of the pavement are seriously influenced, and great traffic safety hidden dangers are caused.
Disclosure of Invention
The invention aims to provide a milling and re-paving construction process suitable for a highway pavement, so as to improve the pavement quality and driving conditions, prolong the service life of the road and meet the requirement of economic development.
The invention is realized by the following technical scheme:
a milling and re-paving construction process suitable for a highway pavement comprises the following steps:
step S1, measuring and paying off, namely measuring the road milling and planing section by using a level gauge, determining the milling and planing length and width, and ensuring that the paving thickness is not less than 10 cm;
step S2, cutting and milling, cutting a transverse end according to the measurement record, wherein the depth of the cut is 2cm, milling and galling are carried out on the transverse end by using a milling machine, and the part of the end which cannot be milled is removed by using a hand-operated pneumatic pick;
step S3, spreading emulsified asphalt, namely uniformly spreading the emulsified asphalt after cleaning the milled pavement, wherein the spreading amount is 0.9-1.2L per square meter, and the mixture does not stick to a wheel; before spraying, the anti-collision piers, the slope-type kerbs and the like on the two sides of the road surface are covered by plastic cloth, so that asphalt pollution is prevented;
s4, transporting the mixture, namely transporting the mixture by using a dumper with the capacity of more than 8T, cleaning the bottom of the dumper and spraying water mixed liquid before loading the mixture by using a vehicle, wherein residual liquid cannot be accumulated at the bottom of a carriage, moving the position of the vehicle for multiple times when loading the mixture from a mixer to a material transporting vehicle, balancing the loading to reduce the segregation of the mixture, covering the upper part of the dumper with bitter cloth after loading to keep the temperature, prevent rain and prevent pollution, and arranging a striking signboard at the tail of the vehicle;
s5, paving an asphalt concrete surface layer, inspecting the mixture on the site, ensuring that the temperature of the mixture is between 145 and 165 ℃, the speed of a paver is 2.5 to 3.5m/min, the construction paving temperature is controlled to be 135 to 160 ℃, and the construction paving temperature is controlled to be 140 to 165 ℃ at low temperature; paving thickness is not less than design thickness; the paving coefficient of asphalt concrete is 1.18-1.21 according to the paving data of the test section;
step S6, compacting, and initial pressing: the primary pressing is rolled following the paver, and the length of a shorter primary pressing area is kept, so that the surface is compacted as soon as possible, and the heat loss is reduced; a double-steel-wheel road roller is adopted, and static pressure is carried out twice; the speed of the road roller is 3km/h, the road roller can spray water to wet the steel wheel to prevent asphalt concrete from bonding the steel wheel, and the initial pressure temperature of normal temperature construction is controlled to be: 130-140 ℃ and not lower than 120 ℃; the initial pressure temperature of low-temperature construction is controlled as follows: 120 ℃ and 150 ℃; not lower than 120 ℃, and two tracks are overlapped by 15-30cm during rolling;
repressing, wherein the repressing follows the initial pressure, the total length of a rolling section of the road roller is kept between 60 and 80m, the repressing temperature is not lower than 110 ℃, a 13T double-steel vibratory road roller is adopted for rolling, and the repressing is carried out for four times, so that vibration can be started after a steel wheel of the road roller enters a newly paved asphalt pavement layer area to protect the original undamaged pavement, and the speed is between 3km/h and 5 km/h; final pressing, wherein the final pressing is performed for 3 times by adopting a 13T rubber-wheel road roller, the static pressure of the 13T double-steel-wheel road roller is ended, the final wheel track elimination is taken as a degree, and the temperature after the final pressing is not lower than 80 ℃; after the final pressure is finished, ensuring that the new pavement is 2mm higher than the old pavement;
and step S7, after the crack pouring is finished and the temperature is reduced to the normal temperature, opening the traffic.
Further, in the step S2, after milling 5cm of the original pavement surface layer, if the lower asphalt surface layer has a defect but does not extend to the base layer, cutting the lower asphalt surface layer according to the width of 30cm of each damaged area required by the design, and the lap width of the longitudinal and transverse steps between the upper and lower layers is not less than 30cm on each side; and backfilling the damaged area by adopting asphalt concrete within the cutting range.
Further, in the step S3, the old and new asphalt concrete transverse joints are lapped with polyester fiberglass cloth; the lapping width is more than or equal to 30cm on each side.
Further, in step S4, before the material transporting vehicle enters the paving site, whether the tires are stained with soil and dirt that may pollute the road surface should be checked, and the vehicle can enter the construction site after being cleaned.
Further, in step S5, in order to prevent segregation, the asphalt concrete surface layer is not spread when being manually paved, but rather is pushed flat when being turned over, and when there is a rough surface at the joint, the asphalt concrete surface layer is spread with fine materials, which should not be too high or too low, and the joint edge should be flat and straight, and no arc-shaped or saw-tooth-shaped edge is allowed.
Further, in the step S5, the liquefied gas is used to heat the screed of the spreading machine to a temperature above 100 ℃ one hour before spreading, so as to prevent the spreading machine from adhering to the mixture.
Further, in the step S5, the paver must be slowed down during the paving process; paving evenly and continuously without changing speed or stopping in the middle; the spiral distributor of the paver should be adjusted to a stable speed to rotate uniformly according to the paving speed, and the mixture with the height not less than the height of the feeder 2/3 should be kept on both sides, so as to reduce the separation of the mixture in the paving process.
Further, in step S6, if the roller is to roll at a slow and uniform speed, the rolling route and the rolling direction of the roller cannot be changed suddenly, so that the mixture is pushed; the length of the rolling area is kept stable, the turning positions at two ends are pushed along with the advancing of the paver, and the rolling area cannot be transversely arranged on the same section; the rolling wheel should be kept clean in the rolling process, and the mixed material is removed immediately when adhering to the wheel; water can be sprayed to the rolling wheel in the rolling process, but the water spraying amount must be strictly controlled, and the water is atomized when sprayed, so that the water cannot flow diffusely.
Further, in the step S7, firstly, a double-steel-wheel roller is used for transversely rolling the paved layer, the paved layer extends 10-15 cm to a new paved layer each time, when the width of the paved layer is 1/2 wheels, the paving is longitudinally rolled for 5-6 m, the flatness of the joint is checked by a three-meter ruler, and the ultra-high point is removed by transversely rolling the paved layer by the double-steel-wheel roller in time, so that the longitudinal and transverse flatness of the paved layer is within a specified range.
Furthermore, when the paver is paved, the same height of the skid as the bottom layer is padded at the ironing plate of the paver, so that the paver accords with the elevation when starting.
The invention has the beneficial effects that:
the construction process is based on the road surface milling and re-paving construction process, and realizes upgrading and forging of the original road by measuring and paying off → cutting → milling → cleaning → spreading emulsified asphalt → mixing of asphalt mixture → transportation of asphalt mixture → paving of asphalt mixture → rolling → open traffic, improves the comfort and road appearance of the road, solves the problem of the original road with diseased sections by milling and re-paving the original road, improves the road surface quality, optimizes the driving conditions, prolongs the service life of the road, and adapts to the needs of economic development.
Drawings
Fig. 1 is a block diagram of a process flow of milling and re-paving a highway pavement according to an embodiment of the invention.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
It should be noted that the descriptions referring to "first" and "second" in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the present invention, unless expressly stated or limited otherwise, the term "coupled" is to be interpreted broadly, e.g., "coupled" may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A milling and re-paving construction process suitable for a highway pavement comprises the following steps:
step S1, measuring and paying off, namely measuring the road milling and planing section by using a level gauge, determining the milling and planing length and width, and ensuring that the paving thickness is not less than 10 cm;
step S2, cutting and milling, cutting a transverse end according to the measurement record, wherein the depth of the cut is 2cm, milling and galling are carried out on the transverse end by using a milling machine, and the part of the end which cannot be milled is removed by using a hand-operated pneumatic pick;
step S3, spreading emulsified asphalt, namely uniformly spreading the emulsified asphalt after cleaning the milled pavement, wherein the spreading amount is 0.9-1.2L per square meter, and the mixture does not stick to a wheel; before spraying, the anti-collision piers, the slope-type kerbs and the like on the two sides of the road surface are covered by plastic cloth, so that asphalt pollution is prevented;
s4, transporting the mixture, namely transporting the mixture by using a dumper with the capacity of more than 8T, cleaning the bottom of the dumper and spraying water mixed liquid before loading the mixture by using a vehicle, wherein residual liquid cannot be accumulated at the bottom of a carriage, moving the position of the vehicle for multiple times when loading the mixture from a mixer to a material transporting vehicle, balancing the loading to reduce the segregation of the mixture, covering the upper part of the dumper with bitter cloth after loading to keep the temperature, prevent rain and prevent pollution, and arranging a striking signboard at the tail of the vehicle;
s5, paving an asphalt concrete surface layer, inspecting the mixture on the site, ensuring that the temperature of the mixture is between 145 and 165 ℃, the speed of a paver is 2.5 to 3.5m/min, the construction paving temperature is controlled to be 135 to 160 ℃, and the construction paving temperature is controlled to be 140 to 165 ℃ at low temperature; paving thickness is not less than design thickness; the paving coefficient of asphalt concrete is 1.18-1.21 according to the paving data of the test section;
step S6, compacting, and initial pressing: the primary pressing is rolled following the paver, and the length of a shorter primary pressing area is kept, so that the surface is compacted as soon as possible, and the heat loss is reduced; a double-steel-wheel road roller is adopted, and static pressure is carried out twice; the speed of the road roller is 3km/h, the road roller can spray water to wet the steel wheel to prevent asphalt concrete from bonding the steel wheel, and the initial pressure temperature of normal temperature construction is controlled to be: 130-140 ℃ and not lower than 120 ℃; the initial pressure temperature of low-temperature construction is controlled as follows: 120 ℃ and 150 ℃; not lower than 120 ℃, and two tracks are overlapped by 15-30cm during rolling;
repressing, wherein the repressing follows the initial pressure, the total length of a rolling section of the road roller is kept between 60 and 80m, the repressing temperature is not lower than 110 ℃, a 13T double-steel vibratory road roller is adopted for rolling, and the repressing is carried out for four times, so that vibration can be started after a steel wheel of the road roller enters a newly paved asphalt pavement layer area to protect the original undamaged pavement, and the speed is between 3km/h and 5 km/h; final pressing, wherein the final pressing is performed for 3 times by adopting a 13T rubber-wheel road roller, the static pressure of the 13T double-steel-wheel road roller is ended, the final wheel track elimination is taken as a degree, and the temperature after the final pressing is not lower than 80 ℃; after the final pressure is finished, ensuring that the new pavement is 2mm higher than the old pavement;
and step S7, after the crack pouring is finished and the temperature is reduced to the normal temperature, opening the traffic.
Specifically, in the embodiment, in step S2, after milling 5cm of the original pavement surface layer, if the lower asphalt surface layer has a defect but does not extend to the base layer, cutting the pavement surface layer according to the width of 30cm of each damaged area required by the design, and the lap width of the longitudinal and transverse steps between the upper and lower layers is not less than 30 cm; and backfilling the damaged area by adopting asphalt concrete within the cutting range.
Specifically, in the embodiment, in step S3, polyester fiberglass cloth is used for lap-joint processing at the transverse joint of the new and old asphalt concrete; the lapping width is more than or equal to 30cm on each side.
Specifically, in the embodiment, in step S4, before the material transporting vehicle enters the paving site, whether the tires are stained with soil and dirt that may pollute the road surface should be checked, and the tires should be cleaned and then can enter the construction site.
Specifically, in the embodiment, in step S5, in order to prevent segregation, the asphalt concrete surface layer is not spread when being manually paved, but is pushed flat after being turned over, and when there is a rough surface at the joint, the fine material is spread, so that the height of the joint is not too high or too low, and the joint edge is flat and straight, and the arc-shaped or saw-toothed edge is not allowed.
Specifically, in this embodiment, in step S5, the liquefied gas is used to heat the screed of the spreading machine to a temperature above 100 ℃ one hour before spreading, so as to prevent the spreading machine from adhering to the mixture.
Specifically, in the embodiment, in step S5, the paver must be slowed down during the paving process; paving evenly and continuously without changing speed or stopping in the middle; the spiral distributor of the paver should be adjusted to a stable speed to rotate uniformly according to the paving speed, and the mixture with the height not less than the height of the feeder 2/3 should be kept on both sides, so as to reduce the separation of the mixture in the paving process.
Specifically, in the embodiment, in step S6, the road roller rolls at a slow and uniform speed, and the rolling route and the rolling direction of the road roller cannot be changed suddenly, so that the mixture is pushed; the length of the rolling area is kept stable, the turning positions at two ends are pushed along with the advancing of the paver, and the rolling area cannot be transversely arranged on the same section; the rolling wheel should be kept clean in the rolling process, and the mixed material is removed immediately when adhering to the wheel; water can be sprayed to the rolling wheel in the rolling process, but the water spraying amount must be strictly controlled, and the water is atomized when sprayed, so that the water cannot flow diffusely.
Specifically, in the embodiment, in step S7, a double-steel-wheel roller is used to roll transversely from a paved layer, each time the new paved layer extends by 10-15 cm, when the width of the new paved layer is 1/2 wheels, the new paved layer is rolled longitudinally by 5-6 m, the flatness of the joint is checked with a three-meter ruler, and the ultra-high point is removed by rolling transversely with the double-steel-wheel roller in time, so that the flatness of the new paved layer is within a specified range.
Specifically, in the scheme of the embodiment, when paving, the same height of the skid as the bottom layer is padded at the ironing plate of the paver, so that the paver accords with the elevation when starting.
The construction process is based on the road surface milling and re-paving construction process, and realizes upgrading and forging of the original road by measuring and paying off → cutting → milling → cleaning → spreading emulsified asphalt → mixing of asphalt mixture → transportation of asphalt mixture → paving of asphalt mixture → rolling → open traffic, improves the comfort and road appearance of the road, solves the problem of the original road with diseased sections by milling and re-paving the original road, improves the road surface quality, optimizes the driving conditions, prolongs the service life of the road and adapts to the needs of economic development.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The milling and re-paving construction process suitable for the highway pavement is characterized by comprising the following steps of:
step S1, measuring and paying off, namely measuring the road milling and planing section by using a level gauge, determining the milling and planing length and width, and ensuring that the paving thickness is not less than 10 cm;
step S2, cutting and milling, cutting a transverse end according to the measurement record, wherein the depth of the cut is 2cm, milling and galling are carried out on the transverse end by using a milling machine, and the part of the end which cannot be milled is removed by using a hand-operated pneumatic pick;
step S3, spreading emulsified asphalt, namely uniformly spreading the emulsified asphalt after cleaning the milled pavement, wherein the spreading amount is 0.9-1.2L per square meter, and the mixture does not stick to a wheel; before spraying, the anti-collision piers, the slope-type kerbs and the like on the two sides of the road surface are covered by plastic cloth, so that asphalt pollution is prevented;
s4, transporting the mixture, namely transporting the mixture by using a dumper with the capacity of more than 8T, cleaning the bottom of the dumper and spraying water mixed liquid before loading the mixture by using a vehicle, wherein residual liquid cannot be accumulated at the bottom of a carriage, moving the position of the vehicle for multiple times when loading the mixture from a mixer to a material transporting vehicle, balancing the loading to reduce the segregation of the mixture, covering the upper part of the dumper with bitter cloth after loading to keep the temperature, prevent rain and prevent pollution, and arranging a striking signboard at the tail of the vehicle;
s5, paving an asphalt concrete surface layer, inspecting the mixture on the site, ensuring that the temperature of the mixture is between 145 and 165 ℃, the speed of a paver is 2.5 to 3.5m/min, the construction paving temperature is controlled to be 135 to 160 ℃, and the construction paving temperature is controlled to be 140 to 165 ℃ at low temperature; paving thickness is not less than design thickness; the paving coefficient of asphalt concrete is 1.18-1.21 according to the paving data of the test section;
step S6, compacting, and initial pressing: the primary pressing is rolled following the paver, and the length of a shorter primary pressing area is kept, so that the surface is compacted as soon as possible, and the heat loss is reduced; a double-steel-wheel road roller is adopted, and static pressure is carried out twice; the speed of the road roller is 3km/h, the road roller can spray water to wet the steel wheel to prevent asphalt concrete from bonding the steel wheel, and the initial pressure temperature of normal temperature construction is controlled to be: 130-140 ℃ and not lower than 120 ℃; the initial pressure temperature of low-temperature construction is controlled as follows: 120 ℃ and 150 ℃; not lower than 120 ℃, and two tracks are overlapped by 15-30cm during rolling; repressing, wherein the repressing follows the initial pressure, the total length of a rolling section of the road roller is kept between 60 and 80m, the repressing temperature is not lower than 110 ℃, a 13T double-steel vibratory road roller is adopted for rolling, and the repressing is carried out for four times, so that vibration can be started after a steel wheel of the road roller enters a newly paved asphalt pavement layer area to protect the original undamaged pavement, and the speed is between 3km/h and 5 km/h; final pressing, wherein the final pressing is performed for 3 times by adopting a 13T rubber-wheel road roller, the static pressure of the 13T double-steel-wheel road roller is ended, the final wheel track elimination is taken as a degree, and the temperature after the final pressing is not lower than 80 ℃; after the final pressure is finished, ensuring that the new pavement is 2mm higher than the old pavement;
and step S7, after the crack pouring is finished and the temperature is reduced to the normal temperature, opening the traffic.
2. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in the step S2, after milling 5cm of the original pavement surface layer, if the lower asphalt surface layer has a defect but does not extend to the base layer, cutting the pavement surface layer according to the width of 30cm of each side of the defect area required by the design, wherein the lapping width of the longitudinal step and the transverse step between the upper layer and the lower layer is not less than 30cm on each side; and backfilling the damaged area by adopting asphalt concrete within the cutting range.
3. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in the step S3, the transverse joints of the new and old asphalt concrete are lapped by using polyester glass fiber cloth; the lapping width is more than or equal to 30cm on each side.
4. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in step S4, before the material transporting vehicle enters the paving site, whether the tires are stained with soil and dirt that may pollute the road surface should be checked, and the vehicle can enter the construction site after being cleaned.
5. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in step S5, in the paving process of the asphalt concrete surface layer, in order to prevent segregation, the asphalt concrete surface layer is not required to be spread when being manually paved, the asphalt concrete surface layer is conveyed to be reversely buckled on the paving surface and then pushed to be smooth, when a rough surface exists at the joint, the asphalt concrete surface layer is spread by fine materials, the asphalt concrete surface layer is not required to be too high or too low, the joint edge is straight, and the arc-shaped or saw-toothed edge is not allowed.
6. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in the step S5, the liquefied gas is used for heating the ironing plate of the spreading machine to be above 100 ℃ one hour before spreading so as to prevent the spreading machine from adhering to the mixture.
7. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in the step S5, the paver must be slowed down in the paving process; paving evenly and continuously without changing speed or stopping in the middle; the spiral distributor of the paver should be adjusted to a stable speed to rotate uniformly according to the paving speed, and the mixture with the height not less than the height of the feeder 2/3 should be kept on both sides, so as to reduce the separation of the mixture in the paving process.
8. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in step S6, the road roller rolls at a slow and uniform speed, and the rolling route and the rolling direction of the road roller cannot be changed suddenly, so that the mixture is pushed; the length of the rolling area is kept stable, the turning positions at two ends are pushed along with the advancing of the paver, and the rolling area cannot be transversely arranged on the same section; the rolling wheel should be kept clean in the rolling process, and the mixed material is removed immediately when adhering to the wheel; water can be sprayed to the rolling wheel in the rolling process, but the water spraying amount must be strictly controlled, and the water is atomized when sprayed, so that the water cannot flow diffusely.
9. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: and in the step S7, firstly, transversely rolling the paved layer by using a double-steel-wheel road roller, extending 10-15 cm to a new paved layer every time, longitudinally rolling for 5-6 m after rolling to 1/2 wheel width, checking the flatness of a joint by using a three-meter ruler, and transversely rolling and eliminating an ultrahigh point by using the double-steel-wheel road roller in time to ensure that the longitudinal and transverse flatness is within a specified range.
10. The milling and re-paving construction process suitable for the highway pavement according to claim 1, wherein the milling and re-paving construction process comprises the following steps: in the step S5, when paving, a skid with the same height as the bottom layer is padded at the screed of the paver, so that the paver meets the elevation when starting.
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| CN113564992A (en) * | 2021-08-13 | 2021-10-29 | 李维维 | Micro-surfacing paver and construction method |
| CN114411551A (en) * | 2022-01-14 | 2022-04-29 | 中铁大桥局集团有限公司 | Bridge deck structure and express way maintenance construction process |
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