CN108978390A - A kind of pavement construction method on the road Tong Cun - Google Patents
A kind of pavement construction method on the road Tong Cun Download PDFInfo
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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
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
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Abstract
A kind of pavement construction method on the road Tong Cun, mix and stir and transport, pavement spread, vibrate including installation pavement construction template, concrete, warehouse leveling, embossing, joint-cutting, maintenance and form removal work progress, implementation through the invention, rapid construction may be implemented in specific work progress, the material on road can also be greatlyd save simultaneously, furthermore, it can also ensure that the density of load, fatigue resistance, compression strength, impact resistant strength and the stability on road surface, can be promoted the use of in a variety of road Tong Cun constructions using concrete.
Description
Technical field
The invention belongs to pavement engineering technical fields, and in particular to a kind of pavement construction method on the road Tong Cun.
Background technique
Cement concrete pavement (cememt concretepavement) refers to and does face by main material of cement concrete
The road surface of layer, abbreviation concrete road surface.Also known as rigid pavement is commonly called as white pavement, it is a kind of high class pavement, cement concrete
Road surface has plain concrete, armored concrete, continuous reinforcement concrete, prestressed concrete, steel fiber reinforced concrete and assembled mixed
The various road surfaces such as solidifying soil.The road construction on the road Tong Cun in China is in the peak period of construction and maintenance, therefore, how the village Ti Tong
The construction on road road surface has extremely important meaning.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of pavement construction methods on road Tong Cun.
The present invention is achieved by the following technical programs.
A kind of pavement construction method on road Tong Cun provided by the invention, comprising the following steps:
S1 installs pavement construction template, according to design transmission rod, pull rod diameter and spaced position setting insertion hole, along road
The every 1m long in the longitudinal direction in face carries out jewel hole using electric drill, and insertion 22 screw-thread steel of φ is pre-buried with fixed form, and hardwood support pad is used under template；
S2, concrete are mixed and stirred and are transported, and concrete carries out centralized mixing in blending station, are mixed and stirred using compulsory mixer,
Automatic gauge, after charging, while stirring plus water, mixing time are 60~90s, are then transported using concrete mixing and transporting car
Defeated, to the peace and quiet compartment tank of transport vehicle before transport vehicle charging, watering profit wall drains ponding, should anti-leak-stopping during concrete transportation
Slurry, material leakage and pollution road surface；
S3, pavement spread are first sprinkled water in base before paving, it is desirable that base is wet before guaranteeing spread concrete, and spread
Uniformly, it prevents at base's out-of-flatness there are ponding, then carries out full width using spade button spade method and pave, top course Concrete Thick
Degree is 16cm, and the primary length 50m that paves, once pave molding；
S4 vibrates, and is first carried out just shaking at road forms edge and corner with vibrator, then as at the beginning of gross area sequence
Vibration is primary, is subject to and no longer emerges bubble and glow cement slurry, same position time of vibration is no less than 30s, then reuses slotting
Enter formula vibrator to be vibrated, mobile spacing is not more than 50cm when vibration, until template distance is not more than 20cm, vibrator insertion is mixed
The depth for coagulating soil is 30~50mm with a distance from base, and the position of jolt ramming is then completed in vibrator, vertical using vibration board
The vibrating time of traversed by twice of comprehensive warehouse jolt ramming of mistake, plate 10~20cm Chong Die with plate spacing, same position should not be less than 15s,
Shift control is limited with vibration board bottom and 3 ± 1mm of edge bleeding thickness, finally, after concrete vibrates comprehensively, to table
Face is tentatively flattened；
S5, warehouse leveling are flattened in the concrete surface dragging round-trip 2-3 of rolling bar, and first pass answers short distance slowly to push away
Rolling or roller then carry out at the uniform velocity roller over long distances, and cement slurry are caught up in front of rolling bar always, and by the shovel of extra cement slurry
It removes, after rolling bar leveling, is accurately struck off in concrete surface using laterally elongated aluminium alloy floating rule round-trip 2~3 times, make to mix
The flatness on solidifying soil surface basically reaches the requirement of σ=1.2, after being struck off using ruler, when surface weeping of concrete finishes into
Row essence is flat, to guarantee road surface flatness；
S6, embossing, is embossed using gaining machine, is embossed when longitudinal slope is greater than 12% using reinforcing bar, is worked as concrete anti-compression
Intensity starts hard cutting after reaching 40%, hard cutting control is completed within two weeks, rinses road surface well after the completion of rag,
And restore the health on road surface；Hard gaining machine weight preferably weighs should not be light, and a rag minimum widith is no less than 500mm, hard rag
Shi Buying falls corner, also must not lift halfway or change direction, and guarantees hard rag to face plate edge；
S7, joint-cutting carry out cut seam using grooving machine, and slit width 5mm, the concrete plate thickness that seam depth is 1/5-1/4, is anti-
Only the flexible stress generated of concrete and cause the crack of concrete slab, when pouring 200m/d concrete and answering joint-cutting, Ying Xian
It carries out building at 50m, 100m, 150m and cut, then piecemeal is cut again；
S8, maintenance carry out covering health to concrete road surface, after concrete coating 2h, when there is suitable hardness on ground, use hand
Health can be started when light pressure does not occur trace by referring to, be covered on its surface with wet straw screen or mat, gunnysack, not only wanted tight oversite concrete
Panel, and to cover the avris of plate；It in defined preserving period, often sprinkles water on straw bag, keeps wet；Conditioned time
Depending on flexural-tensile strength of concrete growth pattern, not less than the 80% of design strength, general health number of days is 14~21 days；
S9, form removal carry out demoulding when concrete crushing strength is not less than 8.0MPa, and pavement construction is completed.
Further, when progress template is fixed in S1 step, bearing diagonal reinforcing bar fixed form bracket is used.
Further, when being mixed and stirred in S2 step, the most short pure mixing time is not shorter than 60s, and when longest is always mixed and stirred
Between be no more than 180s.
Further, when S3 step carries out pavement spread, the volume thickness that paves reserves 2-3cm and is used for jolt ramming.
Further, it when being paved in step s3, when construction is interrupted for some reason, should be set in the good panel end of making
Construction joint is set, discarding cannot be by the mixture of jolt ramming.
Further, when S4 step is vibrated, artificial feed supplement should be aided with, effect of vibrating check at any time, template, drawing
Situations such as bar, the displacement of transmission rod and steel mesh, deformation loosening, spillage, and timely correction.
Further, when carrying out warehouse leveling in S5, while the whole seam of clear side is carried out, removes mucilage, repaired and lack side, arrisdefect
Work.
Further, when S6 step is embossed, the minimum widith once embossed is not less than 500mm.
Further, when carrying out form removal in S9, when temperature on average round the clock is greater than 30 °, allow demoulding it is earliest when
Between be 18 hours.
The beneficial effects of the present invention are: implementation through the invention may be implemented quickly in specific work progress
Construction, while can also greatly save the material on road, additionally it is possible to guarantee road surface again with intensity, fatigue resistance, anti-
Compressive Strength, impact resistant strength and stability can be promoted the use of in a variety of road Tong Cun constructions using concrete.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of pavement construction method on the road Tong Cun, comprising the following steps:
S1 installs pavement construction template, according to design transmission rod, pull rod diameter and spaced position setting insertion hole, along road
The every 1m long in the longitudinal direction in face carries out jewel hole using electric drill, and insertion 22 screw-thread steel of φ is pre-buried with fixed form, and hardwood support pad is used under template；
S2, concrete are mixed and stirred and are transported, and concrete carries out centralized mixing in blending station, are mixed and stirred using compulsory mixer,
Automatic gauge, after charging, while stirring plus water, mixing time are 60~90s, are then transported using concrete mixing and transporting car
Defeated, to the peace and quiet compartment tank of transport vehicle before transport vehicle charging, watering profit wall drains ponding, should anti-leak-stopping during concrete transportation
Slurry, material leakage and pollution road surface；
S3, pavement spread are first sprinkled water in base before paving, it is desirable that base is wet before guaranteeing spread concrete, and spread
Uniformly, it prevents at base's out-of-flatness there are ponding, then carries out full width using spade button spade method and pave, top course Concrete Thick
Degree is 16cm, and the primary length 50m that paves, once pave molding；
S4 vibrates, and is first carried out just shaking at road forms edge and corner with vibrator, then as at the beginning of gross area sequence
Vibration is primary, is subject to and no longer emerges bubble and glow cement slurry, same position time of vibration is no less than 30s, then reuses slotting
Enter formula vibrator to be vibrated, mobile spacing is not more than 50cm when vibration, until template distance is not more than 20cm, vibrator insertion is mixed
The depth for coagulating soil is 30~50mm with a distance from base, and the position of jolt ramming is then completed in vibrator, vertical using vibration board
The vibrating time of traversed by twice of comprehensive warehouse jolt ramming of mistake, plate 10~20cm Chong Die with plate spacing, same position should not be less than 15s,
Shift control is limited with vibration board bottom and 3 ± 1mm of edge bleeding thickness, finally, after concrete vibrates comprehensively, to table
Face is tentatively flattened；
S5, warehouse leveling, drags rolling bar round-trip 2 times in concrete surface and is flattened, first pass answers short distance slowly to push away
Rolling or roller then carry out at the uniform velocity roller over long distances, and cement slurry are caught up in front of rolling bar always, and by the shovel of extra cement slurry
It removes, after rolling bar leveling, is accurately struck off in concrete surface using laterally elongated aluminium alloy floating rule round-trip 3 times, make coagulation
The flatness on native surface reaches the requirement of σ=1.2, after striking off, carries out essence when surface weeping of concrete finishes and puts down, to guarantee road
Face surface smoothness；
S6, embossing, is embossed using gaining machine, is embossed when longitudinal slope is greater than 12% using reinforcing bar, is worked as concrete anti-compression
Intensity starts hard cutting after reaching 40%, hard cutting control is completed within two weeks, rinses road surface well after the completion of rag,
And restore the health on road surface.Hard gaining machine weight preferably weighs should not be light, and a rag minimum widith is no less than 500mm, hard rag
Shi Buying falls corner, also must not lift halfway or change direction, and guarantees hard rag to face plate edge.
S7, joint-cutting carry out cut seam using grooving machine, and slit width 5mm, the concrete plate thickness that seam depth is 1/5-1/4, is anti-
Only the flexible stress generated of concrete and cause the crack of concrete slab, when pouring 200m/d concrete and answering joint-cutting, Ying Xian
It carries out building at 50m, 100m, 150m and cut, then piecemeal is cut again；
S8, maintenance carry out covering health to concrete road surface, after concrete coating 2h, when there is suitable hardness on ground, use hand
Health can be started when light pressure does not occur trace by referring to, be covered on its surface with wet straw screen or mat, gunnysack, not only wanted tight oversite concrete
Panel, and to cover the avris of plate.It in defined preserving period, often sprinkles water on straw bag, keeps wet；Conditioned time
Depending on flexural-tensile strength of concrete growth pattern, not less than the 80% of design strength, general health number of days is 14~21 days；
S9, form removal carry out demoulding when concrete crushing strength is not less than 8.0MPa, and pavement construction is completed.
Further, when progress template is fixed in S1 step, bearing diagonal reinforcing bar fixed form bracket is used.
Further, when being mixed and stirred in S2 step, the most short pure mixing time is not shorter than 60s, and when longest is always mixed and stirred
Between be no more than 180s.
Further, when S3 step carries out pavement spread, the volume thickness that paves reserves 2-3cm and is used for jolt ramming.
Further, it when being paved in step s3, when construction is interrupted for some reason, should be set in the good panel end of making
Construction joint is set, discarding cannot be by the mixture of jolt ramming.
Further, when S4 step is vibrated, artificial feed supplement should be aided with, effect of vibrating check at any time, template, drawing
Situations such as bar, the displacement of transmission rod and steel mesh, deformation loosening, spillage, and timely correction.
Further, when carrying out warehouse leveling in S5, while the whole seam of clear side is carried out, removes mucilage, repaired and lack side, arrisdefect
Work.
Further, when S6 step is embossed, the minimum widith once embossed is not less than 500mm.
Further, when carrying out form removal in S9, when temperature on average round the clock is greater than 30 °, allow demoulding it is earliest when
Between be 18 hours.
It is further described for engineering is embodied below.
1.1 Engineering Notice
Zhengan County rural highway merger organizational system village shares 424 roads, overall length 1837.4km, width of subgrade 4.5m, and road surface is wide
3.7m, each 0.4m of two sides shoulder width are spent, road shoulder uses 16cmC20 piece stone concrete, and road base uses 5cm graded broken stone,
Road surface uses 16cmC30 concrete.
1.2 the key technical indexes
Road quality classification: the road Tong Cun
Design speed per hour: 15km/h
Width of subgrade: 4.5m
Pavement Structure: Cement Concrete
Carload grade: 0.8 times of-II grade of highway
1.3 pavement construction methods, step
Concrete mixing controls concrete strength using program-controlled equipment control, addition water-reducing agent.
1.4 match ratio
Aqua match ratio is not added and subtracted
| Title material | Water | Cement | Fine aggregate | Coarse aggregate | Remarks |
| Every cubic metre of dosage | 185 | 440 | 763 | 1011 |
Using water-reducing agent match ratio
| Title material | Water (kg) | Cement (kg) | Fine aggregate (kg) | Coarse aggregate (kg) | Additive (kg) | Remarks |
| Every cubic metre of dosage | 175 | 371 | 800 | 1045 | 8 |
According to match ratio data comparison, cement 69kg is saved using every cube of concrete after water-reducing agent, consumes water-reducing agent
8kg/m3.It is calculated according to market unit price, every cube of concrete reduces by 20 yuan of cost.
2 constructions
2.1 pavement construction templates install (outer road shoulder steel form)
1, due to top course thickness 16mm, template uses 22 channel steels, and every section 3.5m long is straight according to design transmission rod, pull rod
Diameter and spaced position setting insertion hole.
2, check that whether there is or not abrasion and weak intercalated layer, conjunctions to be processed for substrate top surface absolute altitude, horizontal slope, flatness, surface layer before formwork erection
Assembled formwork after lattice.
3, longitudinal every 1.0m electric drill jewel hole, insertion 22 screw-thread steel of φ is pre-buried with fixed form, uses hardwood support pad under template, tiltedly
Spacer bar fixes bracket.
4, plan-position and elevation are gone through, plan-position deviation is not more than 5mm, and longitudinal height variation is not more than 3mm；
Formwork support arrangement is firm, straight, smooth, distortionless, and adjacent forms are completely embedded smoothly, must not have bottom spillage, front and back mistake stubble and
Phenomena such as height faulting of slab ends, forbids the grooving in base, is embedded in installation template.After template installation is in place, lateral stay, is checked mixed
The base being higher by must be scabbled the thickness to guarantee concrete flag when measured value is less than design thickness by the thickness at solidifying soil middle part
Degree.
5, longitudinal on the outside of template to block cement mortar, it prevents from following spillage.
2.2 concrete mixing and stirring and transporting
1, concrete carries out centralized mixing in blending station, is mixed and stirred using compulsory mixer, automatic gauge, and it is inclined to mix and stir metering
Difference control is within specification allowed band.After charging, while stirring plus water, mixing time are 60~90s, most short pure mixing time
60s should not be shorter than, and 180s is not to be exceeded in longest total mixing time, mix answers uniformity, have it is raw mix, siccative, isolation or
The heterogeneous mix of the agglomerating phenomenon of additive forbid to mix and stir for pavement spread the slump be the slump value most preferably to pave and
Slump-loss value sum of the two is transported under temperature at that time.
2, using concrete mixing and transporting car, peace and quiet compartment tank is answered before charging, watering profit wall drains ponding；Concrete fortune
Mortar leakage prevention, material leakage and pollution road surface are answered during defeated, must not arbitrarily be stopped on the way；More than following table regulation pave allow longest when
Between concrete must not be used for pavement spread, concrete is once stopping in the car is more than the presetting period, and should take urgent measure place
It sets, forbids concrete hardening in compartment (tank).Special messenger commands when vehicle backing and discharging, and transport vehicle is in template or conductor section tune
Head or while giving another the right of way, forbid collision slab or reference line, once collision, re-measures correction immediately.
Concrete mix discharging finishes permission maximum duration to transport, making
2.3 paving
1, top course Concrete Thick 16cm, full width pave, the length that once paves 50m, the one layer of molding that paves.
2, base sprinkles water before paving, it is desirable that base is wet before guaranteeing spread concrete, and spread is uniform as far as possible, especially
Forbid at base's out-of-flatness with the presence of ponding phenomenon.
3, before concrete batching system paves, the installation of position and supporting & stablizing situation to template, transmission rod, pull rod is carried out
It is comprehensive to check, it is consistent with thickness setting scale complete detection plate thickness with design value, can starts to pave.
4, special messenger commands concrete delivery truck discharging, and discharging accurate as far as possible is forbidden to collide construction equipment and measuring instrument；It unloads
Material finishes, and vehicle should speed away.
5, it is paved with spade button spade method, throwing or an animal-drawn seed plough is forbidden to harrow, paving thickness considers jolt ramming, reserves 2-3cm.
6, the paving, vibrate, flattening of every storehouse concrete, the face of doing should be carried out continuously, must not interrupt.If interrupted for some reason, Ying
Construction joint is arranged in the good panel end of making, and discarding cannot be by the mixture of jolt ramming.
2.4 vibrating
It is used cooperatively using vibrating beam, poker vibrator with flat vibrator when vibrating.
1, it first uses vibrator to shake at the beginning of at template edge, the corner or shake as at the beginning of gross area sequence primary when vibrating, must not owe
Vibration or leakage, are subject to and no longer emerge bubble and glow cement slurry, same position time of vibration is no less than 30s, internal vibration
The mobile spacing of device is not more than 50cm, until template distance is not more than 20cm, collision slab and reinforcing bar should be avoided.When vibrating, it should be aided with
Artificial feed supplement, the displacement of vibrate check at any time effect, template, pull rod, transmission rod and steel mesh deform situations such as loosening, spillage,
And timely correction.Preferably from 30~50mm of base, vibrating spear should be inserted gently and be mentioned slowly vibrator insertion depth, must not be inserted and be pulled out fastly suddenly, forbid
Carry out in mixture and dilatory vibrating spear vibrates.
2, the position of jolt ramming is completed in vibrator, criss-cross twice of vibration board comprehensive warehouse jolt ramming can be started.
The vibrating time of plate 10~20cm Chong Die with plate spacing, same position should not be less than 15s.Vibration board must be lifted by two people to shake
Displacement is pounded, must not freely be placed or long lasting for vibration.Shift control is with vibration board bottom and edge bleeding thickness 3
± 1mm is limited.It is levelling that the position of scarce material should be aided with artificial feed supplement.
3, it is preliminary to flatten concrete vibrates comprehensively after.
The leveling of 2.5 warehouses
Concrete is vibrated after jolt ramming, and round-trip 2~3 times warehouses leveling of rolling bar should be dragged.First pass answers short distance slowly to push away
Rolling or roller, answer relatively long distance at the uniform velocity roller, and cement slurry is caught up in front of rolling bar always, extra cement slurry should be rooted out later.
When rolling bar rolling leveling, the height situation of material position, should be aided with when excessively high and manually root out, have gap under axis before should having special messenger to handle axis
When, it should be made up a deficiency using concrete.
After rolling bar leveling, surface preferably use transverse direction elongated aluminium alloy floating rule round-trip 2~3 times and is accurately struck off, and makes to mix
The flatness on solidifying soil surface basically reaches the requirement of σ=1.2.The whole seam of clear side should be carried out simultaneously, removes mucilage, repaired and lacked side, fall
Angle.After concrete is struck off with ruler, to its surface bleeding after to carry out essence in time flat, to guarantee road surface flatness.
2.6 quarters (pressure) line
Concrete road surface makes anti-skid construction using hard rag, i.e., is embossed using gaining machine, rag size, depth, spacing
In strict accordance with design requirement, embossed when longitudinal slope is greater than 12% using reinforcing bar, depth and width will meet design requirement.Work as coagulation
Native compression strength can start hard cutting after reaching 40%, and preferably complete in two weeks.Road surface should be rinsed well after the completion of rag,
And restore the health on road surface.Hard gaining machine weight preferably weighs should not be light, and a rag minimum widith is no less than 500mm, hard rag
Shi Buying falls corner, also must not lift halfway or change direction, and guarantees hard rag to face plate edge.
2.7 joint-cutting
Contracting seam is handled using joint-cutting method, is stitched using grooving machine cut.Slit width is 5mm, and seam depth is H/4~H/5 plate thickness.For
It prevents the flexible stress generated of concrete and causes the crack of concrete slab, when pouring 200m/d concrete and answering joint-cutting, answer
It first carries out building at 50m, 100m, 150m and cut, then piecemeal is cut again.When carrying out pavement concrete pouring construction, use is red
Paint is marked, to prevent misplacing when joint-cutting.
2.8 maintenance
Concrete slab conserves in time after doing face, and binder in concrete is made to have good aquation, hydrolysis intensity development
Condition and the generation for preventing contraction fissure.
1, conditioned time is depending on flexural-tensile strength of concrete growth pattern, not preferably less than the 80% of design strength, especially
Pay attention to preceding moisturizing in 7 days (temperature) maintenance.General health number of days is 14~21d.
2, during conserving before joint seal, no thoroughfare for vehicles.After reaching the 40% of design strength, allow pedestrian logical
It crosses.
3, health is covered.After concrete coating 2h, when there is suitable hardness on ground, gently pressed with finger when not occurring trace
Start health, is covered on its surface with wet straw screen or mat or gunnysack (non-woven fabrics) etc., not only wants tight oversite concrete panel, Er Qieyao
Cover the avris of plate.It in defined preserving period, often sprinkles water on straw bag, keeps wet.
2.9 form removal
Demoulding concrete easy to damage too early, it is too late, it influences template and is used in turn.When concrete crushing strength is not less than
The side 8.0MPa can demoulding, when lacking intensity measurement data, the earliest striking time of permission of avris template preferably meets the rule of following table
It is fixed.It does not reach requirement, when cannot remove end mould, one piece of panel can be vacated, start and pave again, the panel vacated waits for both ends
It is doed for supplement again after demoulding.
Concrete flag allows striking time
| Temperature on average (DEG C) round the clock | 5 | 10 | 15 | 20 | 25 | ≥30 |
| Allow demoulding earliest time (h) | 72 | 48 | 36 | 30 | 24 | 18 |
It is careful to operate when demoulding, does not damage concrete edges of boards, plate angle and transmission rod, the concrete around pull rod, also not
Transmission rod and pull rod must be caused to loosen or deform, form removable pulls out wedge tool using dedicated, forbids to dismantle mould using sledgehammer attack
Plate.
The template of dismounting removes clean, brushing template oil, and stacking is neat.When template has damage, deforms, to repair in time,
Correction accuracy meets code requirement.
Claims (9)
1. a kind of pavement construction method on the road Tong Cun, it is characterised in that the following steps are included:
S1 installs pavement construction template, according to design transmission rod, pull rod diameter and spaced position setting insertion hole, along road surface
Longitudinal every 1m long carries out jewel hole using electric drill, and insertion 22 screw-thread steel of φ is pre-buried with fixed form, with hardwood support pad under template；
S2, concrete are mixed and stirred and are transported, and concrete carries out centralized mixing in blending station, are mixed and stirred using compulsory mixer, automatically
Metering, after charging, while stirring plus water, mixing time are 60~90s, are then transported using concrete mixing and transporting car,
To the peace and quiet compartment tank of transport vehicle before transport vehicle charging, watering profit wall drains ponding, answered during concrete transportation mortar leakage prevention,
Material leakage and pollution road surface；
S3, pavement spread are first sprinkled water in base before paving, it is desirable that and base is wet before guaranteeing spread concrete, and spread is uniform,
It prevents at base's out-of-flatness there are ponding, then carries out full width using spade button spade method and pave, top course concrete thickness is
16cm, the primary length 50m that paves, once pave molding；
S4 vibrates, and first carries out first vibration at road forms edge and corner with vibrator, then by the just vibration one of gross area sequence
It is secondary, it is subject to and no longer emerges bubble and glow cement slurry, same position time of vibration is no less than 30s, then reuses plug-in type
Vibrator is vibrated, and mobile spacing is not more than 50cm when vibration, until template distance is not more than 20cm, vibrator is inserted into concrete
Depth with a distance from base be 30~50mm, the position of jolt ramming is then completed in vibrator, is handed in length and breadth using vibration board
The vibrating time of wrong twice of comprehensive warehouse jolt ramming, plate 10~20cm Chong Die with plate spacing, same position should not be less than 15s, displacement
Control is limited with vibration board bottom and 3 ± 1mm of edge bleeding thickness, finally, after concrete vibrates comprehensively, to surface into
The preliminary leveling of row；
S5, warehouse leveling, concrete surface dragging the round-trip 2-3 of rolling bar flattened, first pass answer short distance slowly push away rolling or
Roller then carries out long range at the uniform velocity roller, and cement slurry is caught up in front of rolling bar always, and rooting out extra cement slurry,
After rolling bar leveling, is accurately struck off in concrete surface using laterally elongated aluminium alloy floating rule round-trip 2~3 times, make coagulation
The flatness on native surface basically reaches the requirement of σ=1.2, after being struck off using ruler, when surface weeping of concrete finishes when progress
Essence is flat, to guarantee road surface flatness；
S6, embossing, is embossed using gaining machine, is embossed when longitudinal slope is greater than 12% using reinforcing bar, is worked as concrete crushing strength
Start hard cutting after reaching 40%, hard cutting control is completed within two weeks, road surface rinsed well after the completion of rag, and extensive
The health on multiple road surface；Hard gaining machine weight preferably weigh it is unsuitable gently a rag minimum widith is no less than 500mm, when hard rag not
Corner should be fallen, also must not lift halfway or change direction, and guarantee hard rag to face plate edge；
S7, joint-cutting carry out cut seam, slit width 5mm, the concrete plate thickness that seam depth is 1/5-1/4, to prevent from mixing using grooving machine
The solidifying flexible stress generated of soil and the crack for causing concrete slab, when pouring 200m/d concrete and answering joint-cutting, Ying Xian
It carries out building at 50m, 100m, 150m and cut, then piecemeal is cut again；
S8, maintenance carry out covering health to concrete road surface, light with finger when there is suitable hardness on ground after concrete coating 2h
Pressure can start health when not occurring trace, be covered on its surface with wet straw screen or mat, gunnysack, not only want tight oversite concrete face
Plate, and to cover the avris of plate；It in defined preserving period, often sprinkles water on straw bag, keeps wet；Conditioned time root
Depending on flexural-tensile strength of concrete growth pattern, not less than the 80% of design strength, general health number of days is 14~21 days；
S9, form removal carry out demoulding when concrete crushing strength is not less than 8.0MPa, and pavement construction is completed.
2. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: carry out template in S1 step and fix
When, use bearing diagonal reinforcing bar fixed form bracket.
3. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when being mixed and stirred in S2 step,
The most short pure mixing time is not shorter than 60s, and longest total mixing time is no more than 180s.
4. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: carry out pavement spread in S3 step
When, the volume thickness that paves reserves 2-3cm and is used for jolt ramming.
5. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when being paved in step s3,
When construction is interrupted for some reason, construction joint should be set in the good panel end of making, discarding cannot be by the mixture of jolt ramming.
6. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when S4 step is vibrated, answer
It is aided with artificial feed supplement, effect of vibrating check at any time, template, pull rod, the displacement of transmission rod and steel mesh, deformation loosening, spillage etc.
Situation, and timely correction.
7. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when carrying out warehouse leveling in S5,
The whole seam of clear side is carried out simultaneously, removes mucilage, repairs the work for lacking side, arrisdefect.
8. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when S6 step is embossed, one
The minimum widith of secondary embossing is not less than 500mm.
9. the pavement construction method on the road Tong Cun as described in claim 1, it is characterised in that: when carrying out form removal in S9, when
When temperature on average is greater than 30 ° round the clock, allowing the earliest time of demoulding is 18 hours.
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Application publication date: 20181211 |