CN106592387A - Cold in-place recycling construction method - Google Patents
Cold in-place recycling construction method Download PDFInfo
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- CN106592387A CN106592387A CN201611199471.5A CN201611199471A CN106592387A CN 106592387 A CN106592387 A CN 106592387A CN 201611199471 A CN201611199471 A CN 201611199471A CN 106592387 A CN106592387 A CN 106592387A
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- Prior art keywords
- cement
- road
- pavement
- cold
- road surface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
Abstract
The invention discloses a cold in-place recycling construction method. The method is characterized by comprising the following steps that S1, construction preparation is conducted, specifically, a to-be-treated old pavement is pretreated, a plurality of atomizing devices are arranged on the two sides of the to-be-treated pavement at equal intervals at the same time, the atomizing devices on the two sides of a road are opposite directly, every two directly opposite atomizing devices conduct injection towards the oblique upward sides, and intersections of injection tracks exist over the to-be-treated pavement; S2, cement is evenly paved and spread on the pretreated pavement, and after the cement is paved for a certain distance, the atomizing devices within the range conduct atomizing operation; S3, water is added into the old pavement where the cement is paved and spread, milling and stirring are conducted to obtain a mixture, and the mixture is evenly flattened on the pavement; and S4, rolling and shaping are conducted. Through collision of two streams of water mist, the water mist can be evenly sprinkled on the cement, the flying dust phenomenon of the cement can be suppressed to a certain degree, the environment pollution is reduced, and the situation that the water is insufficient for actual use is prevented.
Description
Technical field
The present invention relates to a kind of technical field of construction, more specifically, it relates to a kind of site Cold Recycling.
Background technology
With the fast development of highway in China traffic, state, provincial trunk highway net are gradually formed, and the proportion of new highway is year by year
Reduce, reconstruction, overhaul engineering ratio constantly expand.Bituminous paving transformation such as continues to adopt traditional approach, not only increases rebuilding
Pitch and sandstone material needed for road surface, destroys surrounding environment, and easily causes environmental pollution.If using cold renewal skill
Art, by asphalt surface course and the regeneration in addition of basic unit's old material, not only can save substantial amounts of road-making material, make full use of old road material
Material, recovers and improves old road intensity, also helps energy saving, it is to avoid environmental pollution, reduces construction costs.
Existing cold regeneration construction technique as shown in the Chinese patent of Application No. 201310212980.7, but due to it
Cement is dispensed using dry method, be further investigation reveals that, the wind that natural wind or vehicle are heaved can be kicked up cement, when wind-force is larger, in wind
A large amount of cement dusts can be accepted on clothes and skin in number kilometer range on mouth, and then causes cement actual amount not enough,
Asphalt pavement regeneration is affected.
The content of the invention
It is an object of the invention to provide a kind of site Cold Recycling for reducing cement dust raising phenomenon.
The present invention above-mentioned technical purpose technical scheme is that:A kind of cold in place recycling construction party
Method, it is characterised in that comprise the steps:
S1, preparation of construction:Pending old pavement is pre-processed, while being equally spaced in pending road surface both sides
Have several atomising devices, the atomising device setting facing each other of road both sides and two just to atomising device injection direction direction
There is crosspoint directly over pending road surface in oblique upper, injection track;
Uniform spreading cement on S2, road surface after the pre-treatment, after often spreading a segment distance, the atomising device in the range of this is carried out
Spray operations;
S3, have on the old pavement of cement in spreading and add water, and carry out milling, stirring and obtain compound, and make compound uniform
Divide and inside go up;
S4, grinding shaping.
By above-mentioned setting, after the pretreatment for completing road pavement, the subsequent uniform spreading cement on the road surface, per spreading
After one segment distance, the atomising device work of road both sides, together towards the direction ejection water smoke of oblique upper, spray angle and level
It is best suitable for into 45 degree of angles between face, this angle will not take up cement, while also ensure that the spray that water smoke can be again higher
Height is penetrated, and the water smoke that this twice sprays can mutually liquidate at the surface being paved with the middle of the road surface of cement, at this time, this two
Road water smoke can be dispelled mutually, be spread out so as to shine surrounding, can as far as possible ensure that water smoke uniformly spreading can exist
On cement, and after water smoke is fallen on cement, the dust raising phenomenon of cement can be effectively reduced, cement reality is avoided to a certain extent
The not enough problem of consumption;And while, after dust raising phenomenon is reduced, it is also possible to reduce in work progress to the pollution of environment.
Preferably, the pretreatment in S1 includes the cleaning to old road.
By above-mentioned setting, some debris such as some sandstone, rubbish present on old road are disposed, it is ensured that construction
Quality.
Preferably, it is first equidistantly uniform on the road surface of pretreatment to place cement bag before spreading cement in S2.
By above-mentioned setting, after cement bag is uniformly placed, during spreading cement, it is only necessary to by each cement bag with
Its position being located is come for the center of circle towards surrounding spreading, compared to traditional direct spreading, can make the cement on road surface
It is more uniform, it is ensured that follow-up construction quality, prevent the phenomenon that some location cement are excessive, some location cement are very few from occurring.
Preferably, cement is uniformly spread out with scraper plate, and makes the area equation that paves of every bag of cement.
It is above-mentioned to spread procedure structure structure out by above-mentioned setting, it is easy to operate, it is not necessary to extra heavy-duty machines, also not
There can be too high requirement to the operating technology of workman, reduce difficulty of construction.
Preferably, promote waterwheel to advance by cold regenerative machine in S3, complete to add water, milling and stirring, the row of cold regenerative machine
Enter speed for 6-12m/min.
By above-mentioned setting, cold regenerative machine promotes waterwheel to advance, that is, waterwheel is located at before cold regenerative machine, waterwheel elder generation
Road to being paved with cement is sprayed water such that it is able to make cement first complete to mix with water, then cold regenerative machine enters in road pavement
Row milling, and at the same time this part milling material out can with cement complete stir fusion obtain compound, if control
The gait of march of cold regenerative machine is consistent, then compound is also uniform spreading on road surface.And due to cement before combination
The mixing with water has been completed in advance, therefore the appearance of dust raising phenomenon also can have to a certain extent been avoided in whipping process.
Shown by a large amount of practical operations, when the gait of march of cold regenerative machine is 12m/min, compound can be caused mixing occur uneven
Even phenomenon, affects the quality of regenerated road surface, and works as gait of march for 6 m/min, causes efficiency of construction to substantially reduce, and when row
Enter speed for 8 m/min when, on the basis of ensureing that compound is uniform, efficiency of construction is farthest lifted.
Preferably, S4 includes first pressing, shaping and the final pressure that road pavement is carried out successively.
By above-mentioned setting, the first pressing for first carrying out ensure that each several part of compound can be prevented by preliminary consolidation
Some places are excessively loose, and some ground are again that the situation of denser occurs;Subsequently carry out shaping, the process of shaping in compound
Mainly make road surface more smooth, because the packing on now road surface is all much the same, therefore the process of shaping can
Make that compound is distributed is more uniform, and subsequently carries out final pressure, makes compound more closely knit, subsequently only needs to allow road surface to carry out several
The standing of its time, the road surface laid by said method, road surface is uniform, and each local materials is essentially the same,
Ensure the service life of road.
Preferably, the first pressing in S4 carries out first pressing mainly for the region between cold regenerative machine wheelmark.
By above-mentioned setting, because cold regenerative machine is during milling, stirring, its tire can rise to a part of compound
To the effect of compacting, therefore the compound denser of this part, and the compound between wheelmark is relative can be more open, so
During first pressing, it is only necessary to which the compound more open to this part is extruded, and is effectively reduced the engineering time, improve
Efficiency of construction.
Preferably, from the beginning of construction section starting point, to regenerator section edge termination, first pressing speed is less than 3km/ to the first pressing in S4
h。
By above-mentioned setting, hold to terminal from initial end, ensure that during first pressing can to extruding in need
Batch mixing material can be expressed to, it is ensured that the abundant degree on road surface is not in larger difference;And if it is too fast to arrive first pressing speed, i.e.,
Shown by many experiments, it is mixed at the packing and wheelmark of the compound between wheelmark when first pressing speed is more than 3km/h
There is larger gap in the packing for closing material, if at this time directly carrying out shaping, compound on road surface can be caused to be distributed not
Uniformly;And work as first pressing speeds control within 3km/h, you can ensure that the packing gap of compound on road surface is less, will not
Have influence on the shaping on final road surface.Certainly, during whole first pressing, it is impossible to the phenomenon paused occur, it is ensured that first pressing is even
What speed was carried out.
Preferably, the final pressure in S4 is rolled by single vibratory road roller from curb to Lu Zhizheng.
By above-mentioned setting, during extruding road surface, the compound at extruding can be to two for single vibratory road roller
Side is moved, and if extruded from Lu Zhizheng to curb, then can cause to assemble more compound in curb, is at this time extruded again
Curb, can cause to have a big chunk compound towards overflowing on both sides of the road, cause the waste of compound, and can cause road surface again
Compound consumption not enough, affects the service life of road during life;Therefore by first extruding curb, then again little by little towards
In the Lu Zhizheng extruding past, compound can be assembled in the middle of middle road, the material part meeting then again in the middle of extrusion path, in the middle of road
It is compacted, another part can be moved to both sides, but because now compound is all denser, it is mixed therefore, it is possible to be prevented effectively from
Close material to occur from the phenomenon that road surface both sides are overflowed, the waste of compound can be avoided to a great extent, it is ensured that the use on road surface
Life-span.
Preferably, the final pressure number of times in S4 is 4 times, and front final pressure speed twice is 1.5-1.7km/h, after speed twice
For 2-2.5km/h.
By above-mentioned setting, during first time extrudes, the material movement phenomenon in road surface can be relatively more frequent, and with
Being on the increase for extrusion passes, road surface is more and more closely knit, at this time compound is just not easy mobile phenomenon, road surface occur
Will be more and more smooth, more and more closely knit.And it is corresponding, because above twice, the phenomenon of compound motion is still than more serious
, therefore above the extrusion speed of both sides wants relative rear both sides a little slower, before extrusion speed twice be faster than 1.7 km/h's
When, it is impossible to the effect of road pavement compacting is completed well, and when the speed is less than 1.5 km/h, although ensure that
The purpose of compacting, but the reduction in efficiency of construction can be caused, and when by speeds control in 1.6 km/h, that is, can guarantee that
The purpose of compacting, while highest efficiency of construction can be taken into account.And the extrusion speed of two sides behind, when speed is more than 2.5 km/h
When, can lead to not reach good squeezing effect, so as to cause the packing on last road surface inadequate, cause making for road
Use life-span degradation, and work as extrusion speed less than 2 km/h, although ensure that road surface has a good packing, but
It is excessively slow in working (machining) efficiency, and when by extrusion speed control 2.25, that is, ensure that the packing on final road surface, and energy
It is enough to ensure most fast efficiency of construction.
In sum, the invention has the advantages that:
1. during construction, reduction dust raising phenomenon that can be as little as possible, it is ensured that cement actual amount reduces work progress
In pollution to environment;
2. can ensure as far as possible uniform in paving mix density.
Description of the drawings
Fig. 1 is the layout drawing that atomising device is inside gone up in embodiment one;
Fig. 2 is the sectional view of embodiment one, for embodying atomising device;
Fig. 3 is the enlarged drawing of part A in Fig. 2.
In figure:1st, old pavement;2nd, atomising device;21st, ventilating water pipe;22nd, atomizer.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing 1-3.
Embodiment one:
A kind of site Cold Recycling, comprises the steps:
S1, preparation of construction:First pending old pavement 1 is carried out to seal road and cleaning works, although in pending road surface both sides
Several atomising devices 2 are arranged, the atomising device 2 of road both sides is setting facing each other, and each atomising device 2 is in length
On coverage be 50m and in the longitudinal direction by entire road all to covering.The shower nozzle of the atomising device 2 of road both sides
It is oppositely arranged, oblique upper injection is all directed towards, with the horizontal 30 degree of angles;
S2, the first transverse and longitudinal distance calculated according to the weight of cement bag between every bag of cement, carry out mark on road, then will
Often bag cement is placed on corresponding mark point, subsequently uniformly out is spread cement by scraper plate, and every bag of cement spreads out and puts on area equation;
S3, waterwheel is promoted to advance with the speed of 6m/min by cold regenerative machine, waterwheel is during traveling towards on road surface
Cement is sprayed water, and while, cold regenerative machine completes milling to ground, and milling material out and the cement for being mixed with water are mixed
Close, and uniformly spread out and put on road surface;
S4, grinding shaping:In cold regenerative machine followed by the light-duty steel-wheeled vibrated roller that a travel speed is 3km/h, it is
From the beginning of construction section starting point, to regenerator section edge termination, the region for being extruded is the region between cold regenerative machine wheelmark, and this is process
For first pressing;After first pressing is finished, immediately shaping is carried out with level land trimmer road pavement, in straightway, land leveller is by two lateral roads
The heart is struck off, and in horizontal curve section, land leveller is struck off by Inside To Outside, forbids any vehicle to lead to during leveling
OK, and keep gathering materials segregation phenomenon without obvious thickness;After the completion of shaping, immediately with single vibratory road roller with low amplitude vibration
Pattern is compacted, from curb to Lu Zhizheng roll when, 1/2 wheel width should be overlapped, be when having pressed full-surfaced width one time, typically need
Roll 4 times.The rolling speed of road roller, 2.0 ㎞/h is preferably adopted to be advisable using 1.5 ㎞/h, later first twice.Subsequently, only need
Road is stood into 3-5 days.
Wherein, cold regenerative machine adopts permanent promise machinery FFMC R450 cold regenerative machines, due to being all equipped with every cold regenerative machine
Waterwheel, therefore just not in the model of this additional description waterwheel, light-duty steel-wheeled vibrated roller is using the production of 31 groups
The all-hydraulic single drive single-drum road rollers of SSR200AC-8, the model PY180 type of level land trimmer, single vibratory road roller is adopted
Mono- steel wheeled vibratory/the vibratory and oscillation rollers of YZ6C/YZD6C manufactured with courser heavy industry, atomising device 2 includes water pump and water service pipe
Road 21, the long 50m of ventilating water pipe 21, water pump gives the water flowing of ventilating water pipe 21, is uniformly arranged several on ventilating water pipe 21 and sprays obliquely
The nozzle of water, installs atomizer 22 on nozzle, this is prior art, therefore is not just repeated in the present embodiment.
Embodiment two:
A kind of site Cold Recycling, comprises the steps:
S1, preparation of construction:First pending old pavement 1 is carried out to seal road and cleaning works, although in pending road surface both sides
Several atomising devices 2 are arranged, the atomising device 2 of road both sides is setting facing each other, and each atomising device 2 is in length
On coverage be 50m and in the longitudinal direction by entire road all to covering.The shower nozzle of the atomising device 2 of road both sides
It is oppositely arranged, oblique upper injection is all directed towards, with the horizontal 45 degree of angles;
S2, the first transverse and longitudinal distance calculated according to the weight of cement bag between every bag of cement, carry out mark on road, then will
Often bag cement is placed on corresponding mark point, subsequently uniformly out is spread cement by scraper plate, and every bag of cement spreads out and puts on area equation;
S3, waterwheel is promoted to advance with the speed of 6m/min by cold regenerative machine, waterwheel is during traveling towards on road surface
Cement is sprayed water, and while, cold regenerative machine completes milling to ground, and milling material out and the cement for being mixed with water are mixed
Close, and uniformly spread out and put on road surface;
S4, grinding shaping:In cold regenerative machine followed by the light-duty steel-wheeled vibrated roller that a travel speed is 3km/h, it is
From the beginning of construction section starting point, to regenerator section edge termination, the region for being extruded is the region between cold regenerative machine wheelmark, and this is process
For first pressing;After first pressing is finished, immediately shaping is carried out with level land trimmer road pavement, in straightway, land leveller is by two lateral roads
The heart is struck off, and in horizontal curve section, land leveller is struck off by Inside To Outside, forbids any vehicle to lead to during leveling
OK, and keep gathering materials segregation phenomenon without obvious thickness;After the completion of shaping, immediately with single vibratory road roller with low amplitude vibration
Pattern is compacted, from curb to Lu Zhizheng roll when, 1/2 wheel width should be overlapped, be when having pressed full-surfaced width one time, typically need
Roll 4 times.The rolling speed of road roller, 2.25 ㎞/h is preferably adopted to be advisable using 1.6 ㎞/h, later first twice.Subsequently, only need
Road is stood into 3-5 days.
Embodiment three:
A kind of site Cold Recycling, comprises the steps:
S1, preparation of construction:First pending old pavement 1 is carried out to seal road and cleaning works, although in pending road surface both sides
Several atomising devices 2 are arranged, the atomising device 2 of road both sides is setting facing each other, and each atomising device 2 is in length
On coverage be 50m and in the longitudinal direction by entire road all to covering.The shower nozzle of the atomising device 2 of road both sides
It is oppositely arranged, oblique upper injection is all directed towards, with the horizontal 60 degree of angles;
S2, the first transverse and longitudinal distance calculated according to the weight of cement bag between every bag of cement, carry out mark on road, then will
Often bag cement is placed on corresponding mark point, subsequently uniformly out is spread cement by scraper plate, and every bag of cement spreads out and puts on area equation;
S3, waterwheel is promoted to advance with the speed of 6m/min by cold regenerative machine, waterwheel is during traveling towards on road surface
Cement is sprayed water, and while, cold regenerative machine completes milling to ground, and milling material out and the cement for being mixed with water are mixed
Close, and uniformly spread out and put on road surface;
S4, grinding shaping:In cold regenerative machine followed by the light-duty steel-wheeled vibrated roller that a travel speed is 3km/h, it is
From the beginning of construction section starting point, to regenerator section edge termination, the region for being extruded is the region between cold regenerative machine wheelmark, and this is process
For first pressing;After first pressing is finished, immediately shaping is carried out with level land trimmer road pavement, in straightway, land leveller is by two lateral roads
The heart is struck off, and in horizontal curve section, land leveller is struck off by Inside To Outside, forbids any vehicle to lead to during leveling
OK, and keep gathering materials segregation phenomenon without obvious thickness;After the completion of shaping, immediately with single vibratory road roller with low amplitude vibration
Pattern is compacted, from curb to Lu Zhizheng roll when, 1/2 wheel width should be overlapped, be when having pressed full-surfaced width one time, typically need
Roll 4 times.The rolling speed of road roller, 2.5 ㎞/h is preferably adopted to be advisable using 1.7 ㎞/h, later first twice.Subsequently, only need
Road is stood into 3-5 days.
It is basic unit's core sample on the cubical complete cold recycled asphalt mixtures of 150mm to take out the length of side by core-drilling machine
As experiment sample, the rupture strength of sample is tested using GB/50081-2002:
Embodiment | Rupture strength/mpa |
Embodiment one | 5.24 |
Embodiment two | 5.46 |
Embodiment three | 5.4 |
As seen from the above table, when the spray angle of atomising device 2 is 45 degree, the gait of march on the front both sides of single vibratory road roller is
1.6 ㎞/h, the gait of march on rear both sides is 2.25 ㎞/h, and whole structure is best.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make as needed the modification without creative contribution after this specification is read to the present embodiment, but as long as at this
All protected by Patent Law in the right of invention.
Claims (10)
1. a kind of site Cold Recycling, it is characterised in that comprise the steps:
S1, preparation of construction:Pending old pavement is pre-processed, while being equally spaced in pending road surface both sides
Have several atomising devices, the atomising device setting facing each other of road both sides and two just to atomising device injection direction direction
There is crosspoint directly over pending road surface in oblique upper, injection track;
Uniform spreading cement on S2, road surface after the pre-treatment, after often spreading a segment distance, the atomising device in the range of this is carried out
Spray operations;
S3, have on the old pavement of cement in spreading and add water, and carry out milling, stirring and obtain compound, and make compound uniform
Divide and inside go up;
S4, grinding shaping.
2. site Cold Recycling according to claim 1, is characterized in that:Pretreatment in S1 is included to old road
Cleaning.
3. site Cold Recycling according to claim 1, is characterized in that:In S2, before spreading cement, first pre-
It is equidistantly uniform on the road surface of process to place cement bag.
4. site Cold Recycling according to claim 3, is characterized in that:Cement is uniformly spread out with scraper plate, and
Make the area equation that paves of every bag of cement.
5. site Cold Recycling according to claim 4, is characterized in that:Waterwheel is promoted by cold regenerative machine in S3
Advance, complete to add water, milling and stirring, the gait of march of cold regenerative machine is 6-12m/min.
6. site Cold Recycling according to claim 1, is characterized in that:S4 includes what road pavement was carried out successively
First pressing, shaping and final pressure.
7. site Cold Recycling according to claim 6, is characterized in that:First pressing in S4 is mainly for cold renewal
Region between wheel mark carries out first pressing.
8. site Cold Recycling according to claim 7, is characterized in that:First pressing in S4 is opened from construction section starting point
Begin, to regenerator section edge termination, first pressing speed is less than 3km/h.
9. site Cold Recycling according to claim 6, is characterized in that:Final pressure in S4 is by single steel wheeled vibratory
Road roller is rolled from curb to Lu Zhizheng.
10. site Cold Recycling according to claim 9, is characterized in that:Final pressure number of times in S4 is 4 times, front
Final pressure speed twice is 1.5-1.7km/h, after speed twice be 2-2.5km/h.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108755362A (en) * | 2018-06-11 | 2018-11-06 | 中科盛联(北京)环保科技有限公司 | Base cures cold regeneration construction method |
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CN2518608Y (en) * | 2001-12-28 | 2002-10-30 | 黄强 | Air dust-falling system (device) |
EP2913438A1 (en) * | 2011-07-04 | 2015-09-02 | Su, Qiang | Hot recycling heating method for old asphalt mixture |
CN103266553A (en) * | 2013-05-31 | 2013-08-28 | 南京道润交通科技有限公司 | Cold-in-place recycling construction method and system |
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