CN104846744B - Construction method for pouring and forming urban viaduct curve type pier stud in one-off mode - Google Patents
Construction method for pouring and forming urban viaduct curve type pier stud in one-off mode Download PDFInfo
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- CN104846744B CN104846744B CN201510120099.3A CN201510120099A CN104846744B CN 104846744 B CN104846744 B CN 104846744B CN 201510120099 A CN201510120099 A CN 201510120099A CN 104846744 B CN104846744 B CN 104846744B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method for pouring and forming an urban viaduct curve type pier stud in a one-off mode. The construction method includes the following steps of 1 positioning pier stud pre-buried main reinforcement, 2 chiseling the combined portion of a pier body and a pile cap, 3 staking out in survey, 4 putting up a scaffold, 5 machining and installing reinforcement, 6 machining and installing a formwork, 7 pouring concrete, 8 disassembling the formwork and curing, and 9 removing the scaffold. According to the construction method for pouring and forming the urban viaduct curve type pier stud in the one-off mode, the pier stud has the advantages of being fast to construct, reasonable in structure, economical, practical and the like and is widely applicable to an urban high-pier bridge, particularly an urban high-pier landscape bridge.
Description
Technical field
The present invention relates to a kind of high-level bridge construction method, be specifically related to a kind of overhead road of city curvilinear style pier stud one-time-concreting and become
Type construction method.
Background technology
Along with economical and the fast development of urban transportation, the bridge in overpass gradually requires " landscape ", Bridge Landscape
City or regional image are moulded and are the most increasingly paid close attention to by people, and will with city or regional image mould mutually
Join.
Pier is compared with beam, and closer to the viewpoint of people, the shape of pier stud, the scale of construction, surface process and appurtenance etc. all define
Landscape feature, is the emphasis of aesthetics design.
Bridge pier also develops to lighter pier very thin, attractive in appearance from cylinder pier in early days in recent years, particularly curvilinear style pier stud
It is widely used at home.
The curvilinear style pier stud suitability is strong, handsome in appearance, it is to avoid the defect of conventional construction method, technologically advanced, reliable,
It is suitable for, reasonable in economy, achieves significant economic and social benefit.
But structure complexity: reinforcing bar flare and dense, space orientation is little compared with working place in difficult, template flare and mould, pier
Top built-in fitting is many.
Traditional construction method is that the main muscle of pier shaft is on-the-spot by root spreading, horizontal hoop successively colligation, pier shaft standard paragraphs, curve
Section template is installed by several times, and concrete pours by several times, long construction period, is easily generated faulting of slab ends, aberration, cold seam, protective layer qualification rate low
Etc. outward appearance and mass defect.
For these defects, the present invention proposes a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method.
Summary of the invention
The technical problem to be solved is to provide a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction
Method, the pier stud suitability is strong, handsome in appearance, it is to avoid the defect of conventional construction method.
A kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method that the present invention provides, construction procedure is as follows:
The first step, the pre-buried main muscle of pier stud positions: pre-buried main muscle, cushion cap reinforcing bar firm welding, and colligation stirrup forms stiff skeleton；Second
Step, pier shaft and cushion cap binding site dabbing: after cushion cap concrete strength reaches 2.5MPa, to cushion cap top inside pier shaft embedded bar
Surface concrete carries out dabbing, chisel has stone to expose to concrete face, and rinses well；3rd step, surveying and locating；Use total powerstation
Putting at cushion cap end face and set Planar Contours inside and outside the longitudinal and transverse axis of pier stud and post mould, ink fountain ejects line, measures surrounding mark at the bottom of pier
Height, as reinforcing bar binding, installation and formwork erection benchmark；4th step, scaffold building；Pier shaft surrounding uses Φ 48mm × 3.5mm bowl
Button support or fastener type steel pipe set up double-pole scaffold tear open as pier shaft reinforcement installation, template peace and during concreting work flat
Platform；Scaffold surrounding closes, and basis falls within cushion cap and processes on the ground hardened, and interior outside utilizes steel pipe and fastener by specification
Requirement arranges brace or bridging, reserves model sheetinstallat, tears open away from except spacing, work layer, passage inside scaffold and between external mold
In width range, scaffold board is paved with surely, and peripheral platform railing is than the superiors operation floor height 1.2m；5th step, steel bar meter with
Install；1) main muscle silk head processing: the main muscle of pier shaft (>=Φ 25mm) uses roll forming straight screw sleeve to connect；2) semi-finished product processing: half
Finished product uses classification processing, takes to stack by root numbering blanking processing, classification for the main muscle of variable cross-section section and stirrup；3) pier shaft steel
Muscles and bones frame is processed: pier stud framework of steel reinforcement, at employing level land, steel bar meter workshop entirety loose tool long line method integral manufacturing, uses shaped steel
Arranging fixed curve section+length-adjustable standard paragraphs pier shaft framework of steel reinforcement long line loose tool, arrange according to the main muscle of pier shaft, loose tool uses
Adjustable support shaped steel frame；6th step, template processing, installation；The good template of level configurations according to pier shaft compiling before model sheetinstallat
Number, entirety is the most assembled, completes formwork edge joint, faulting of slab ends, flatness adjustment；Pre-splicing qualified template reach local, plate face uneven≤
1.0mm, adjacent two plate surface differences of height≤1.0mm, piece≤1.0mm, template integral surface flatness≤3.0mm, and in examination
Paint is used to adjust labelling after the template back rib of split lattice；The template of pre-splicing acceptance(check) splits in bulk, and polishing machine is beaten repeatedly
It is milled to metal light tone, uses unified releasing agent, at template surface uniform application, the most air-dried, and use covered rearing with plastic film to prevent
Dirt；7th step, concreting；Curvilinear style pier stud pier shaft and binder concrete one-piece casting molding, pier shaft concrete vibrating is close
Real, stretch at pier top binder and reserve concreting tumbling barrel peace at the main muscle of levels of pier stud and tear open, vibrate personnel's lower channel, disconnected
The reinforcing bar opened uses rolling straight thread sleeve connection, and levels and adjacent splice are staggered the distance not less than 35d；Vibrate
Personnel reserve manhole and cat ladder to inside reinforcing bar through pier top, connect tumbling barrel casting concrete, and tumbling barrel uses the lumps of wood, steel pipe to become groined type
Being supported on template suitable for reading, base opening distance concrete end face is less than 2.0 meters, and concrete uses truck crane to promote hopper, tumbling barrel blanking, presses
Horizontal 30cm is layered, and adjacent pier stud pours in turn, and single pier stud surrounding and middle part pre-set multiple stage vibrating spear and vibrate, and water
When building upper strata, poker vibrator extend into lower floor 5～10cm, after concrete strength reaches 2.5MPa, completes pier top bearing pad stone
Concrete artificial chiseling；8th step, form removable, health preserving；Crane coordinates the dismounting being accomplished manually template, and the template of dismounting is divided
Class stacking, concentrates cleaning, brushes releasing agent use standby next time；Room temperature lower bolster is sprinkled water maintenance after removing immediately, uses plastics thin
Film and adhesive tape closely swathe covering, keep thin film to cover tight, make component surface be in moisture state all the time；9th step,
Scaffold is removed；Dismantling operation frame after form removable, before scaffold is removed, makees to scaffold to check, clear all residue comprehensively
Material, utensil and foreign material, mark place of safety, arrange warning mark during dismounting.
In the first step, to long-term exposed steel bar brushing aqueous rust preventive mud, main muscle connecting filament head screws in mechanical sleeves or protection
Cap, overall parcel carries out corrosion protection.
In 6th step, template uses crane to coordinate the mode manually adjusted to carry out block-by-block installation, and coxopodite template passes through cushion cap
Embedded ribs is fixed, and is adjusted in place by pre-splicing number order and labelling during template assembly, uses sticking double faced adhesive tape and polish between piece
Flushing, protective layer cushion block is vertical with template closely connected, checks center off normal and the perpendicularity of template, tightly after every sections template assembly is good
Being solidly connected accessory, model sheetinstallat completes, perpendicularity and center detection qualified after, the very useful cable wind rope of template joins tension device by steel
Template four limit is splayed fixation.
In 7th step, pier top is once received slurry, control table surface evenness after completing by concreting, treats that concrete is wanted
Carrying out secondary during the most non-initial set of initial set and receive slurry, before form removable, pier shaft and binder top concrete utilize geotextiles pair after receiving light
End face concrete carries out covering water-retention health preserving.
In 8th step, high temperature season, pier top arranges drip irrigation bucket tape splicing hole water pipe and is wound around pier shaft overlay film and drips pouring and carry out maintenance, winter
Season constructs, and plastic sheeting adds the double-deck geotextiles of thickening and swathes insulated curing after swathing, and increases canvas covering inside support,
Carry out heating curing, it is ensured that concrete is not less than 10 DEG C in 7 days after pouring.
The present invention has the advantages that, relative to prior art, a kind of overhead road of city curvilinear style pier that the present invention provides
Post one-time-concreting molding construction method: 1, quality significantly improves, pier shaft steel bar meter, level land entirety loose tool long line method integral manufacturing
Taking manufacturer's standard equalization, it is simple to quality control and examination, on-the-spot merogenesis is assembled into entirety, it is ensured that pier shaft reinforcement installation essence
Degree；Pier body formwork uses big face set shaped steel formwork, takes external to drawing reinforcing from steady system, is disposably assembled into entirety, favorably
In formwork edge joint, faulting of slab ends inspection and plan-position, degree control, improve pier stud finished appearance quality and physical dimension essence
Degree, it is achieved that finished product pier shaft is without tie rod hole；The high-quality releasing agent that template brushing is unified, the disposable continuous placing of pier stud concrete,
After ensure that form removal, finished product pier shaft is without Construction Joint, and concrete color and luster is consistent.
2, construction safety, risk are little, process, assembled in situ formula installs more conventional on-the-spot processing by ectocine in reinforcing bar field
Factor is few；Eliminate conventional template secondary installing, support, remove operation, improve working security.
3, duration, progress aspect, pier stud framework of steel reinforcement loose tool method batch making inside, and bearing platform construction parallel operations,
On-the-spot framework of steel reinforcement assembled is installed, and the disposable Fast Installation of Pier Formwork, the disposable fast continuous placing of concrete, with routine
Reinforcing bar scene dissipate tie up, reinforcing bar, template are installed at twice, and concrete pours at twice and compares, and single seat pier stud construction period can contract
Short 4～5 days.
4, cost-effective, economic benefit aspect, the present invention improves template, the utilization rate of steel pipe support circulation material；Subtract
Lack steel bar meter waste of material, improve work efficiency, eliminate conventional construction secondary joint treatment, scaffold job platform is set up
Remove, model sheetinstallat removes personnel, the input of crane hoisting equipment, it is achieved that operation is effectively changed, and accelerates progress, decreases
Project management expense is paid.
Accompanying drawing explanation
Fig. 1 is the construction flow chart of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The features such as the construction method that the present invention provides has quick construction, rational in infrastructure, economical and practical, are widely used in city
City's height pier bridge, especially city height pier landscape bridge.
The technological principle of the construction method that the present invention provides is: pier shaft surrounding sets up steel pipe scaffold as pier shaft reinforcing bar
Frame is installed, template peace is torn open and concreting job platform, and pier shaft framework of steel reinforcement uses level land loose tool method integral manufacturing in factory,
On-the-spot merogenesis is mounted to entirety, and the set shaped steel formwork merogenesis of pier body formwork employing pier shaft curve form is assembled, one piece Zhi Li,
It is achieved thereby that pier shaft, inter-tie concrete continuously poured in one molding.
The operation scheme of the present invention is: one, the pre-buried main muscle of pier stud positions pre-buried main muscle and cushion cap reinforcing bar firm welding, colligation
Sufficient amount of stirrup forms stiff skeleton, in case cushion cap concreting, embedded bar deformation, displacement when vibrating, to for a long time
Exposed steel bar brushing aqueous rust preventive mud, main muscle silk head screws in mechanical sleeves or protective cap, and overall parcel carries out corrosion protection.
Two, after pier shaft and cushion cap binding site dabbing cushion cap concrete strength reach 2.5MPa, in pier shaft embedded bar
Side cushion cap end face concrete carries out dabbing, chisel has more stone to expose (fresh concrete) to concrete face, and rinses well.
Three, surveying and locating uses total powerstation to put at cushion cap end face and sets face profile inside and outside the longitudinal and transverse axis of pier stud and post mould
Line, ink fountain ejects line, measures surrounding absolute altitude at the bottom of pier, as reinforcing bar binding, installation and formwork erection benchmark.
Four, scaffold building pier shaft surrounding uses Φ 48mm × 3.5mm bowl button support or fastener type steel pipe to set up double foot
Hand cradle is torn open and work platforms during concreting as pier shaft reinforcement installation, template peace.
Scaffold surrounding closes, and basis falls within cushion cap and processes on the ground hardened, and interior outside utilizes steel pipe and fastener
Brace or bridging are set by code requirement, it is ensured that the stability in the large of support.
Reserved model sheetinstallat inside scaffold and between external mold, tear open away from except spacing, foot hands in the range of work layer, channel width
Plate is paved with surely, and peripheral platform railing is than the superiors operation floor height 1.2m.
Five, steel bar meter district is set up in steel bar meter and erecting bed, is specifically designed to reinforcing bar and stacks and processing.
1, main muscle silk head processing: the main muscle of pier shaft (>=Φ 25mm) uses roll forming straight screw sleeve to connect, site setup silk head
Processing job platform, it is achieved that the processing of Steel Reinforcing Bar Material, silk head, polishing, finished product are stacked, checked and accepted streamlined operation.
2, semi-finished product processing: semi-finished product use classification processing, for the main muscle of variable cross-section section and stirrup because of each spot size not
Deng, take to stack by root numbering blanking processing, classification.
3, pier shaft framework of steel reinforcement processing: in order to ensure precision and the installation effectiveness of on-the-spot pier shaft reinforcement installation, effectively solve
The main muscle of curved section and stirrup all directions and size technical barrier not etc., pier stud framework of steel reinforcement uses flat in steel bar meter workshop
The overall loose tool long line method integral manufacturing in ground.
Because curve pier stud pier shaft curved section size is fixed, on-the-spot employing shaped steel arranges fixed curve section+length-adjustable mark
Quasi-section pier shaft framework of steel reinforcement long line loose tool, arranges according to the main muscle of pier shaft, loose tool uses adjustable support shaped steel frame, to be adapted to not
With cross section Making of reinforcement cage and be easy to lifting displacement.
As a example by the approach viaduct rectangle Fructus Citri Sarcodactylis column pier of Nantong City, pier stud short transverse is bent by the straightway+4m changed
Line segment, straightway sectional dimension (direction across bridge × along bridge to) is 1.6 × 2.0m, middle pier curved section tip section a size of 2.3 ×
2.0m, abutment pier curved section tip section a size of 2.3 × 2.5m, scene setting-out loose tool centrage on level land is straight, curved with pier shaft
Section cross-sectional axis overlaps, and [12.6 channel-section steels arrange fetal membrane pedestal (phase by pier shaft straightway interval 1.5m, curved section interval 1m in employing
Shaped steel is used to connect, to guarantee integral rigidity between adjacent pedestal), it is contemplated that the cross section gradual change of pier shaft curved section, curved section pedestal one
Side arranges that the angle steel of width scalable 100 × 10 is hinged with pedestal, opposite side by pier shaft linear arrange 100 × 10 angle steel
Consolidate with pedestal, the angle steel of the superiors' main muscle bracing frame rational height scalable 50 × 5 and broad-adjustable 100 × 10
Angle steel is hinged, and curved section moulding bed supports the gradual change the most therewith of shaped steel height simultaneously, and main muscle is pressed in angle steel side, fetal membrane both sides 100 × 10
Spacing welding, for fixing the location nut of main muscle pullable positioning bar, completes the straightway pier shaft of 4m fixed curve section+change
The making of skeleton long line loose tool, this stand is applicable to pier in differing heights, the making of abutment pier framework of steel reinforcement.
Pier shaft framework of steel reinforcement uses merogenesis to make, overall binding, first installs scalable 100 × 10 and 50 × 5 jiaos
Steel, 50 × 5 angle steel, 100 × 10 angle steel affixed with opposite side use alignment pin to be connected, and main muscle installed by both sides 100 × 10 angle steel
Brace rod, forms overall fetal membrane, places main muscle by mark on loose tool shaped steel and brace rod, and the main muscle of pier shaft uses roll forming straight thread
Sleeve connection, the splice quantity of same section is less than the 50% of section number of steel bars, and adjacent splice is staggered and is not less than
The distance of 35d, each main muscle of curved section need to put in strict accordance with design attitude, accurately adjust the main muscle of curved section towards and use locknut
Locking, the most respectively often save main top rib, in and tail end on weld three roads altogether and put more energy into stirrup (diameter is with main muscle), put more energy into stirrup with
Main muscle is firm by root spot welding, with ensure finished steel muscles and bones erect hang rigidity, skeleton splits and the docking essence of sleeve during in-site installation
Degree, according to the construction process of the muscle method of forming of putting more energy into, last colligation pier shaft stirrup, main muscle, levels grid pair are close in stirrup colligation
Together, interlamellar spacing is accurate, and complete framework of steel reinforcement.
After pier shaft framework of steel reinforcement coupling completes, the company of making painted by the reinforcing bar that two adjacent sections framework of steel reinforcement is corresponding
Connect labelling, carry out section number, hoisting ring is set at merogenesis framework of steel reinforcement puts more energy into stirrup, it is ensured that framework of steel reinforcement lifting time
Rigidity, it is to avoid be distorted deformation, completes the withdrawing that pier shaft main muscle in both sides supports, and releases side movable 100 × 10,50
× 5 angle steel and the connection of opposite side 100 × 10 angle steel, in order to merogenesis framework of steel reinforcement splits lifting displacement, merogenesis reinforcing bar
Erect to hang and be displaced to regulation place specification and deposit.
Framework of steel reinforcement is installed: check qualified framework of steel reinforcement, by front court erection sequence, uses flat bed transport vehicle merogenesis to be transported to
Scene, flat bed transport vehicle arranges the framework of steel reinforcement supporting platform seat identical with fetal membrane spacing, during to prevent framework of steel reinforcement from stacking, to transport
Deformation.
The method merogenesis being used " 2 liftings " by crane is installed, and lifting furred ceiling arranges steel wire rope shoulder pole girder and stirrup of putting more energy into
Suspension centre connects, and to ensure framework of steel reinforcement perpendicularity, hand fit's framework of steel reinforcement is the most in place.
The main muscle of pier stud uses roll forming straight screw sleeve and the sections framework of steel reinforcement of band locknut and the pre-buried sign of cushion cap
Main muscle is sat in the right seat, and connects one by one, uses spanner by sleeve and to treat that spreading bar connecting is tightened, then is adopted with sleeve by spreading reinforcing bar
With nut-locking, and use torque spanner that quality of connection is tested.
For ensureing pier shaft framework of steel reinforcement plan-position, perpendicularity, by the setting-out of pier shaft plan-position on cushion cap, by falling hammer
Measuring, on height, every 2-4m utilizes steel pipe to set up main muscle together on scaffold and installs profile frame formation stiff skeleton to pacifying
Dress framework of steel reinforcement carries out checking, protecting.
Section by section after framework of steel reinforcement installation, require that thickness protected only by reinforcing bar in the side colligation of pier shaft framework of steel reinforcement and design
That degree matches and label same with pier shaft concrete, same to color and luster, concrete protective layer pad in blossom type.
Curved section both sides pier shaft styletable sets binder, first carries out upper binder bed die and installs, then completes binder reinforcement installation.
After pier stud reinforcement installation, as do not carried out model sheetinstallat in time, surrounding should arrange cable rope and be fixed and use coloured silk
Bar cloth carries out wrapping up antifouling, antirust.
Six, template processing, installation form are installed the front good template of level configurations according to pier shaft and number, and entirety is spelled in advance
Dress, completes formwork edge joint, faulting of slab ends, flatness adjustment.
Pre-splicing qualified template should reach local, plate face injustice≤1.0mm, adjacent two plate surface differences of height≤1.0mm, spells
Seam≤1.0mm, template integral surface flatness≤3.0mm, and use paint to adjust mark after the template back rib of examination split lattice
Note.
The template of pre-splicing acceptance(check) splits in bulk, and polishing machine is polishing to metal light tone repeatedly, uses unified releasing agent,
At template surface uniform application, the most air-dried, and use covered rearing with plastic film dust-proof, prevent secondary pollution, it is ensured that concrete surface
Minute surface sense.
Template uses crane to coordinate the mode manually adjusted to carry out block-by-block installation, and coxopodite template is solid by cushion cap embedded ribs
Fixed, it is adjusted in place by pre-splicing number order and labelling during template assembly, uses sticking double faced adhesive tape polishing to flush between piece, reach
Seam is tight, and without faulting of slab ends, protective layer cushion block is vertical with template closely connected, without damaged, checks template after every sections template assembly is good
Center off normal and perpendicularity, be fastenedly connected accessory, it is ensured that template has enough strength and stiffness, qualified rear next joint mould assembled
Plate.
Model sheetinstallat completes, perpendicularity and center detection qualified after, the very useful cable wind rope of template joins tension device by punching block
Plate four limit is "eight" shape fixation.
Seven, concreting curvilinear style pier stud pier shaft and binder concrete one-piece casting molding, because pier shaft reinforcing bar is intensive, pier
Top bearing pad stone reinforced mesh and built-in fitting are more, and concreting and always its construction Difficulties of vibrating, for guaranteeing concrete
Entering mould smoothly, pier shaft concrete vibrating is closely knit, stretches at pier top binder and reserves concreting string at the main muscle of levels of pier stud
Cylinder peace is torn open, and vibrate personnel's lower channel, and the reinforcing bar of disconnection uses rolling straight thread sleeve connection, levels and adjacent splice
Stagger the distance not less than 35d.
Personnel of vibrating reserve manhole and cat ladder to inside reinforcing bar through pier top, connect tumbling barrel casting concrete, tumbling barrel use the lumps of wood,
It is suitable for reading that steel pipe becomes groined type to be supported on template, and base opening distance concrete end face is less than 2.0 meters, and concrete uses truck crane to promote material
Bucket, tumbling barrel blanking, it is layered by horizontal 30cm, adjacent pier stud pours in turn, it is contemplated that in mould, reinforcing bar is intensive, and vibrating spear shifts not
Just, single pier stud surrounding and middle part pre-set multiple stage vibrating spear and vibrate, and the personnel that are on the one hand conducive to vibrating are vibrated, another
Aspect accelerates concrete vibrating progress, it is to avoid concreting time length is easily formed cold seam, alleviates personnel of vibrating and works by force
Degree, operation of vibrating follows the principle of " first outside and then inside, fast insert pull out slowly but do not owe ", and when pouring upper strata, poker vibrator stretches into
To lower floor 5-10cm, to ensure comprehensive vibration compacting, should prevent the impact of template vibrated device from deforming or collision slab, steel
Muscle, built-in fitting etc., find, when reinforcing bar is trampled or support member shifts, to revise in time, forbid operating personnel arbitrarily to walk on reinforcing bar
Dynamic.
Pier top is once received slurry, control table surface evenness after completing by concreting in time, treats that initial set wanted by concrete
Carry out secondary during the most non-initial set and receive slurry, prevent concrete surface from crackle occurring.
Before form removable, pier shaft and binder top concrete utilize geotextiles to cover end face concrete after receiving light immediately
Lid water-retention health preserving.
After concrete strength reaches 2.5MPa, complete pier top bearing pad stone concrete artificial chiseling.
Eight, form removable, health preserving crane coordinate the dismounting being accomplished manually template, and the template classification of dismounting is stacked, and concentrate clear
Manage, brush releasing agent use standby next time.
Room temperature lower bolster is sprinkled water maintenance after removing immediately, uses plastic sheeting and adhesive tape closely to swathe covering in time,
Keep thin film to cover tight, make component surface be in moisture state all the time.
High temperature season, pier top arranges drip irrigation bucket tape splicing hole water pipe and is wound around pier shaft overlay film and drips pouring and carry out maintenance.
Winter construction, plastic sheeting adds the double-deck geotextiles of thickening and swathes insulated curing, and increases inside support after swathing
Add canvas to cover, carry out heating curing, it is ensured that concrete is not less than 10 DEG C in 7 days after pouring.
Nine, get final product dismantling operation frame after scaffold form removal is removed, before scaffold is removed, scaffold is made inspection comprehensively
Looking into, clear all surplus material, utensil and foreign material；Mark place of safety during dismounting, warning mark is set, send special messenger to keep an eye on；Remove
Component and fitting should classify stacking, in order to transport, safeguard and take care of.
The performance analysis of this arrangement and method for construction: (one) Economic and Efficiency Analysis 1. pier shaft steel bar meter uses with on-the-spot bearing platform construction
Parallel construction, have effectively achieved operation and converts, improve seriality and the harmony of pier construction.
2. pier shaft Steel Reinforcing Bar Material, processing, integral manufacturing use manufacturer's standard equalization, it is simple to quality control and examination, have
Effect ground improves work efficiency, machinery utilization rate, decreases the raw-material wasting of resources.
3. the main muscle of pier stud uses straight screw sleeve to be mechanically connected, and according to crane capacity, on-the-spot pier shaft framework of steel reinforcement can be in advance
Merogenesis spreading, uses assembled integral installation, it is ensured that installation quality, installation effectiveness, reduces or cancel reinforcement installation platform
Set up, more traditional pier shaft reinforcement installation, on-the-spot use steel pipe successively to set up job platform, main muscle use crane coordinate by
Root bead spreading, layering stirrup colligation, reinforcement process compare, and difficulty of construction reduces, labor intensity alleviates, and jack lift uses
Time reduces in a large number, and the duration shortens at double.
4. pier body formwork optimizes assembly, reinforcing mode, improves precision and the installation effectiveness of model sheetinstallat, pier shaft coagulation
Soil one-time-concreting, decreases second coagulation soil joint treatment, reinforcing bar combing spreading, scaffold job platform in conventional project construction
Set up dismounting, template secondary installing, support, remove operation, improve template, the utilization rate of steel pipe support circulation material, reduce
Personnel, crane gear, the input of material.
5. the present invention is ensureing on the premise of quality, the effectively save duration, decreases waste of material, improves work efficiency, fall
Low construction, management cost, have good economic benefit.
As a example by single seat pier stud (twin columns) is constructed, more conventional construction technology is compared, and averagely saves artificial 15 work days, 25T
3 machine-teams of truck crane, 4-5 days reduction of erection time, improve template, the use of pier shaft double-pole scaffold steel pipe support circulation material
Rate, labor service, machine cost reduce about 8000 yuan/, add that the duration saves the benefit brought, remarkable in economical benefits.
(2) social benefit is analyzed curvilinear style pier stud more application and is required high project, this category in city and regional image
Mesh most duration is tight, and quality, safety, civilized construction are required height, and the present invention, on the premise of effectively promoting quality, improves work
Industryization construction degree, few by Environment Confinement Factor, construction safety risk is little, improve work efficiency, the reduction of erection time, cost-effective and
Safety construction aspect achieves breakthrough, has good social benefit.
Claims (5)
1. an overhead road of city curvilinear style pier stud one-time-concreting molding construction method, it is characterised in that:
Construction procedure is as follows:
The first step, the pre-buried main muscle of pier stud positions:
Pre-buried main muscle, cushion cap reinforcing bar firm welding, colligation stirrup forms stiff skeleton；
Second step, pier shaft and cushion cap binding site dabbing:
After cushion cap concrete strength reaches 2.5MPa, cushion cap end face concrete inside pier shaft embedded bar carrying out dabbing, chisel is extremely
Till concrete face has stone to expose, and rinse well；
3rd step, surveying and locating；
Using total powerstation to put at cushion cap end face and set Planar Contours inside and outside the longitudinal and transverse axis of pier stud and post mould, ink fountain ejects line, surveys
Measure surrounding absolute altitude at the bottom of pier, as reinforcing bar binding, installation and formwork erection benchmark；
4th step, scaffold building；
Pier shaft surrounding uses Φ 48mm × 3.5mm bowl button support or fastener type steel pipe to set up double-pole scaffold as pier shaft reinforcing bar peace
Dress, template peace is torn open and work platforms during concreting；Scaffold surrounding closes, and basis falls within cushion cap and processes the ground hardened
On base, interior outside utilizes steel pipe and fastener to arrange brace or bridging by code requirement, reserves inside scaffold and between external mold
Model sheetinstallat, tearing open away from except spacing, in the range of work layer, channel width, scaffold board is paved with surely, and peripheral platform railing compares the superiors
Operation floor height 1.2m；
5th step, steel bar meter and installation；
1) main muscle silk head processing: pier shaft main muscle Φ > 25mm uses roll forming straight screw sleeve to connect；
2) semi-finished product processing: semi-finished product use classification processing, take to add by root numbering blanking for the main muscle of variable cross-section section and stirrup
Work, classification are stacked；
3) pier shaft framework of steel reinforcement processing: pier stud framework of steel reinforcement is in employing level land, steel bar meter workshop entirety loose tool long line method entirety system
Make, use shaped steel that fixed curve section+length-adjustable standard paragraphs pier shaft framework of steel reinforcement long line loose tool is set, according to pier shaft main muscle cloth
Putting, loose tool uses adjustable support shaped steel frame；
6th step, template processing, installation；
The good template of level configurations according to pier shaft numbering before model sheetinstallat, entirety is the most assembled, complete formwork edge joint, faulting of slab ends,
Flatness adjusts；
Pre-splicing qualified template reach plate face local injustice≤1.0mm, adjacent two plate surface differences of height≤1.0mm, piece≤
1.0mm, template integral surface flatness≤3.0mm, and use paint to adjust labelling after the template back rib of examination split lattice；
The template of pre-splicing acceptance(check) splits in bulk, and polishing machine is polishing to metal light tone repeatedly, uses unified releasing agent, at mould
Plate surface uniform application, air-dries, and uses covered rearing with plastic film dust-proof；
7th step, concreting；
Curvilinear style pier stud pier shaft and binder concrete one-piece casting molding, pier shaft concrete vibrating is closely knit, stretches at pier top binder
Reserving concreting tumbling barrel peace at the main muscle of levels of pier stud to tear open, vibrate personnel's lower channel, and the reinforcing bar of disconnection uses rolling
Straight screw sleeve connects, and levels and adjacent splice are staggered the distance not less than 35d；
Personnel of vibrating reserve manhole and cat ladder to inside reinforcing bar through pier top, connect tumbling barrel casting concrete, and tumbling barrel uses the lumps of wood, steel pipe
Becoming groined type to be supported on template suitable for reading, base opening distance concrete end face is less than 2.0 meters, and concrete uses truck crane to promote hopper, string
Cylinder blanking, is layered by horizontal 30cm, and adjacent pier stud pours in turn, and single pier stud surrounding and middle part pre-set multiple stage and vibrate
Rod vibrates, and when pouring upper strata, poker vibrator extend into lower floor 5～10cm, after concrete strength reaches 2.5MPa, completes pier
Topmast seat cushion stone concrete artificial chiseling；
8th step, form removable, health preserving；
Crane coordinates and is accomplished manually the dismounting of template, and the template classification of dismounting is stacked, and concentrates cleaning, brushes releasing agent and make for next time
With；Room temperature lower bolster is sprinkled water maintenance after removing immediately, uses plastic sheeting and adhesive tape closely to swathe covering, keeps thin film to cover
Cover tightly, make component surface be in moisture state all the time；
9th step, scaffold is removed；
Dismantling operation frame after form removable, before scaffold is removed, makees to scaffold to check, clear all surplus material, device comprehensively
Tool and foreign material, mark place of safety, arrange warning mark during dismounting.
2. a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method as claimed in claim 1, it is characterised in that:
In the first step, to long-term exposed steel bar brushing aqueous rust preventive mud, main muscle silk head screws in mechanical sleeves or protective cap, overall bag
Wrap up in and carry out corrosion protection.
3. a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method as claimed in claim 2, it is characterised in that:
In 6th step, template uses crane to coordinate the mode manually adjusted to carry out block-by-block installation, and coxopodite template is pre-buried by cushion cap
Muscle is fixed, and is adjusted in place by pre-splicing number order and labelling during template assembly, uses sticking double faced adhesive tape polishing to flush between piece,
Protective layer cushion block is vertical with template closely connected, checks center off normal and the perpendicularity of template after every sections template assembly is good, and fastening is even
Connecing accessory, model sheetinstallat completes, perpendicularity and center detection qualified after, the very useful cable wind rope of template joins tension device by steel form
Four limits are splayed fixation.
4. a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method as claimed in claim 3, it is characterised in that:
In 7th step, pier top is once received slurry, control table surface evenness after completing by concreting, treats that initial set wanted by concrete
Carrying out secondary during the most non-initial set and receive slurry, before form removable, pier shaft and binder top concrete utilize geotextiles to end face after receiving light
Concrete carries out covering water-retention health preserving.
5. a kind of overhead road of city curvilinear style pier stud one-time-concreting molding construction method as claimed in claim 4, it is characterised in that:
In 8th step, high temperature season, pier top arranges drip irrigation bucket tape splicing hole water pipe and is wound around pier shaft overlay film and drips pouring and carry out maintenance, executes winter
Work, plastic sheeting adds the double-deck geotextiles of thickening and swathes insulated curing, and increase canvas covering inside support, carries out after swathing
Heating curing, it is ensured that concrete is not less than 10 DEG C in 7 days after pouring.
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| CN201510120099.3A CN104846744B (en) | 2015-03-19 | 2015-03-19 | Construction method for pouring and forming urban viaduct curve type pier stud in one-off mode |
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