CN110093852A - Shaped form bridge pier Construction technology of fair-faced concrete - Google Patents
Shaped form bridge pier Construction technology of fair-faced concrete Download PDFInfo
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- CN110093852A CN110093852A CN201910407913.8A CN201910407913A CN110093852A CN 110093852 A CN110093852 A CN 110093852A CN 201910407913 A CN201910407913 A CN 201910407913A CN 110093852 A CN110093852 A CN 110093852A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The present invention provides shaped form bridge pier Construction technology of fair-faced concrete, also be specifically divided into the installation of bridge pier template, pier stud reinforcing bar and installation of embedded parts, bearing pad stone construction, concreting, pour, vibrate, concrete curing and winter protect and the processing step for the treatment of of construction joints, wherein, Pier Formwork is rigid template of being formed, connection between Pier Formwork is bolted, Pier Formwork lower part is also fixed on cushion cap with anchor bolt, the top of Pier Formwork is fixed with cable wind rope oblique pull, and poker vibrator vibration compacting is also used in casting process；The present invention has studied application of the set shaped steel formwork in special-shaped bridge pier, solve the problems, such as that big scale of construction abnormal shape bridge pier dry concrete construction presentation quality is bad, the arrangement and method for construction using set shaped steel formwork primary concreting is determined, concrete surface impression quality is bad caused by avoiding in work progress because of formwork edge joint, reinforcing the problems such as difficult because of bridge pier abnormal formwork.
Description
Technical field
The present invention relates to building engineering fields, and in particular to shaped form bridge pier Construction technology of fair-faced concrete.
Background technique
Bridge refers generally to be erected in rivers,lakes and seas, the structures for making vehicle, pedestrian etc. that can smoothly pass through, modern to adapt to
The transportation industry of high speed development, bridge be also extended to across mountain stream, unfavorable geology or meet other traffic need and set up make
Current more convenient and fast building.River bridge engineering is located at the river surface of city and surrounding city, can widen city frame,
Kind road network system facilitates citizens' activities.The problem of in the erection process of bridge also according to geology and bridge span structure, exists and land
The problem that matter is ill-conditioned, bridge span structure span is big, weight is big and adaptation to local conditions uses special-shaped bridge pier etc. in the construction process, it is different
The pier shaft cross section of shape bridge pier is irregular geometry figure (not being the circle or rectangle of standard) or pier shaft cross section with height
In variation (generally from top to bottom section from large to small) i.e. variable cross-section pier shaft, the fabrication and installation of template and template amortization charge is larger,
Column and crossbeam junction are difficult to smooth drop-over, the more difficult effect for accomplishing clear-water concrete of the appearance of bridge pier.
Summary of the invention
To solve the above problems, using sizing steel the present invention provides shaped form bridge pier Construction technology of fair-faced concrete
The arrangement and method for construction of template primary concreting avoids in work progress because of formwork edge joint, because bridge pier abnormal formwork reinforcing difficulty etc. is asked
Concrete surface impression quality caused by topic is bad.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
Shaped form bridge pier Construction technology of fair-faced concrete, it is characterised in that: specific steps are as follows:
Step 1: bridge pier template is installed: Pier Formwork is rigid template of being formed, and the connection between Pier Formwork is connected by bolt
It connects, Pier Formwork lower part is also fixed on cushion cap with anchor bolt, and the top of Pier Formwork is fixed with cable wind rope oblique pull；
Step 2: pier stud reinforcing bar and installation of embedded parts: Pier Formwork determines supporting pad after the installation is completed, according to Pier Formwork position
Stone position and built-in fitting position support and also install reinforcing bar and anchor hole at pinner position and built-in fitting position, wherein built-in fitting is
Steel bar meter, the pouring type of built-in fitting are concreting, are also vibrated using poker vibrator in built-in fitting casting process
It is closely knit；
Step 3: bearing pad stone is constructed: the reinforcing bar of bearing pad stone position also sets up support template, support template after binding
The loose concrete at bearing pad stone embedded bar, and the concrete laitance air compressor machine for knot being stained on reinforcing bar are also cut before installation
It blows clean, then carries out bearing pad stone concreting, concrete casting enters mould using the method feeding of crane batch hopper, pours
Receipts face is smeared with iron after the completion；
Step 4: concreting: bridge pier concreting uses automobile pumpdown, first uses cement mortar wet channels,
Concrete conveyance is carried out again, constantly exports when the concrete continuous in pipeline and uniformly and when not generating bubble starts concrete
Cloth；Before pouring pier concrete, bottom first pours into the cement mortar of 50mm thickness, the ratio of mud of the cement mortar of bottom used
Less than the concrete water cement mortar ratio of mud；For the drop height degree that freely inclines when concreting no more than 2m, casting, which uses, prevents coagulation
The tumbling barrel blanking of soil isolation, also uses foot bar control hierarchy thickness；Concrete pour using layering continuously elapse by the way of into
Row, lift height are not more than 300mm, pour off time no more than 30min, bridge pier concreting is one-time-concreting molding.
Further, double-sided adhesive is also posted in step 1, at form joint only to starch.
Further, in step 1, the cable wind rope that is surrounded by of Pier Formwork is fixed, at the top of Pier Formwork and middle part
Tetra- cable wind rope of Bie She divides four direction to be fixed on ground concrete anchor pier, and cable wind rope and ground-angle are 45 °, cable wind rope root
Flower basket bolt is arranged in portion.
Further, in step 2, built-in fitting includes elevation and anchor hole built-in fitting.
Further, in step 2, the built-in fitting of processing also removes mould agent, correction and reinforcing by polishing, painting before pouring
The step of handle.
Further, in step 3, when support template is installed, top surface is 5mm about lower than bearing pad stone top surface designed elevation.
Further, before bridge pier concreting, pile foundation and pier, abutment body joint concrete is subjected to dabbing, removed floating
Slurry and loose part, are rinsed well, and rebuild connection reinforcing bar, concrete is also in the forced action type for being equipped with autoelectrinic metering system
The mixing plant centralized mixing of blender is transported after mixing using concrete conveyance tank car, is pumped into bridge pier template.
Further, the concrete vibrating that will be poured in bridge pier concreting process using plug-in type high speed vibrator
Closely knit, every vibrating time is no more than 30s, and when using plug-in type high speed vibrator vibrated concrete, concrete vibrating mode is vertical
Point vibration mode is vibrated, and in process of vibrating when vibrating spear evolution, is first vertically slowly extracted vibrating spear, then will be vibrated again
Stick moves to new position.
Further, the spacing of vibrating of plug-in type high speed vibrator is controlled, poker vibrator is not more than its operating radius
1.5 times；The distance of vibrator to template is not more than 0.5 times of its operating radius.The height of lift height pattern of control concrete is shaking
1.25 times or so for smashing device effect partial length, vibrate new one layer, should all inject first 5~10cm of casting concrete.
Further, long 2/3~3/4 of stick, vibrating spear is not to be exceeded in the depth of the vibrating spear insertion concrete of vibrator
It to twitch up and down in time, be layered uniform vibration compacting, after vibrating well, slowly pull out vibrating head, vibration is also filled up by concrete
Cavity caused by stick, intermediate sequence of vibrating after being implemented in process of vibrating around first.
The invention has the benefit that shaped form bridge pier Construction technology of fair-faced concrete of the invention, has studied sizing steel
Application of the template in special-shaped bridge pier solves the problems, such as that big scale of construction abnormal shape bridge pier dry concrete construction presentation quality is bad,
Specifically by comparison type selecting and on-the-spot investigation, it is determined that using the arrangement and method for construction of set shaped steel formwork primary concreting, avoid applying
During work because of formwork edge joint, reinforce the problems such as difficult because of bridge pier abnormal formwork caused by concrete surface impression quality it is bad；
Then refine adjustment various processes in the construction process, strict control raw material ratio, reinforced bar engineering and template maintenance, installation,
The process qualities such as reinforcing, dismounting guarantee that bridge pier Surface Quality of Concrete achievees the effect that clear-water concrete.
Specific embodiment
In order to which those skilled in the art better understood when technical solution provided by the present invention, below with reference to specific
Embodiment income illustrates.
Shaped form bridge pier Construction technology of fair-faced concrete is also specifically divided into the installation of bridge pier template, pier stud reinforcing bar and pre-buried
Part is installed, bearing pad stone construction, concreting, pours, vibrates, concrete curing and winter protect and the work for the treatment of of construction joints
Skill step；Complex-shaped, the appearance requirement height of be poured bridge pier: if bridge pier is designed using Y type abnormal shape, column and crossbeam are handed over
It meets place and smooth drop-over is designed using circular curve, highly reach 8.7m, this size bridge pier belongs to mass concrete, and bridge pier appearance
Achieve the effect that clear-water concrete.
Pier Formwork uses set shaped steel formwork, and panel uses 6mm steel plate, and frame uses 12*80 strip, and pier shaft erects rib and uses
10# channel steel, pier cap erect rib and use 12*80 strip, and gusset uses 10*80 strip, and back cord uses pier using double 12# channel steels, template
To drawing, quadrangle oblique pull is fixed on top, uses 20# fining twisted steel to pull rod.It is ordered in advance by template factory according to the drawing of offer
System.The connection of pier stud steel form piecemeal is connected by screw bolts, and lower part is fixed on cushion cap using anchor bolt, top use diameter for
The cable wind rope oblique pull of 16mm is fixed.
Pier body formwork installation should try to spell the number of calibration according to template, successively installation from bottom to top.It first carries out in a pre-installation
Over-the-counter examination is spelled, and strictly to be checked and accepted to template flatness, structure size, secondly should be checked pier stud axis and absolute altitude, through multiple
After core is errorless, with 25T crane indirect labor's formwork erection, each piece of template is connected by screw bolts, and template is made to form entirety, then uses mould
The strength round steel pull rod being arranged outside plate is reinforced to drawing, and to surface cover pvc pipe and plug outside pull rod, pvc pipe port is in face when installation
On the outside of plate, plug, rubber washer and gasket is arranged in end, so that rubber washer is close to steel form panel by tightening pull-rod nut,
Tie rod hole spillage in concreting process is prevented, pier stud bolt hole is blocked after facilitating demoulding.It is set in template bottom swollen
Swollen bolt or template is fixed on the positioning in embedded bar head outside pier stud.
It pastes double-sided adhesive at form joint only to starch, double-sided adhesive cannot have disconnection phenomenon, and joint cannot be torn by hand, and must use blade
It cuts.In template installation process, one section template of every installation is in time corrected template using vertical line to mold plate verticality.
After template is installed, steel form is fixed with 12mm cable wind rope, corrects steel form verticality using total station.
Template storage, transport, hoisting process should take the measures protection template faces such as wood lump supporting pad, felt package protection
Plate avoids clashing and breaking template surface Shimizu concrete template paint.
For the vertical stability for guaranteeing template, template is tilted when anti-casting concrete, and it is solid that template using surrounding sets cable wind rope
It is fixed.Pier stud height 8.7m sets four cable wind ropes in die head and middle part respectively and four direction is divided to be fixed on ground concrete anchor
On pier, cable wind rope and ground-angle are 45 degree, and flower basket bolt is arranged in cable wind rope root.
Operating personnel must stand the operation on the inside of scaffold, and work surface completely spreads scaffold board.Phase is answered between template and scaffold
It is mutually independent, in order to avoid cause template deformation in manual operation on scaffold.
It should polish steel form panel before template installation, fully erased panel rusty stain, grey slurry residual, solder joint and weldering
Slag carries out panel cleaning using the clear water for having blent detergent after the completion of polishing, and clean rag carries out panel cleaning, and processing is completed
Technician carries out an acceptance inspection afterwards, and brushing salad oil can be carried out after acceptance(check), should be carried out immediately after brushing plastic film cover into
The dust-proof isolation of row.Template bottom and cushion cap face contact position use high-grade cement mortar accurately levelling closure, prevent concrete
Slurries, which are lost, when pouring there is rotten and pitted skin phenomenon.It after template installation, is examined with total station and ruler, to determine position and several
Whether what size is correct, if meets design drawing requirement, whether seam is tight, if has faulting of slab ends, carries out verticality inspection, really
Whether fixed to tilt, to its node contacts, interior outer support, pull rod, vertically and horizontally stability, gradient, reinforcing bar and built-in fitting are examined
It looks into, it can pouring concrete after the signature of management passed examination.In casting Concrete, special messenger is arranged to be responsible for template monitoring,
Such as find that template has a possibility that beyond tolerance to be corrected in time during being poured concrete, it is ensured that form stable
Property, wherein the tolerance of template installation is also as shown in the table:
Scaffold in the construction process uses 48 × 3.0 steel pipe of φ, sets up scaffold, scaffold upright rod spacing along pier stud surrounding
0.6m, array pitch 0.6m, cross bar step pitch 1.5m, each facade is all made of double frame, and is arranged in outer protective frame and throws support.It is vertical in pier stud
Outboard row scaffold board in surface side middle position is laid with upper people's ladder, step pitch 30cm, and slope ratio is not more than 1:1.732, that is, be less than etc.
In 30 °.Using scaffold formation operation platform, completely spread scaffold board, and guard rail is set thereon, surrounding is gone along with sb. to guard him with green net；For
Construction is gone on smoothly, and scaffold building height should be synchronous in template mounting height.
The operational procedure of steel pipe scaffold are as follows: inner upright bar → outer vertical rod → small cross bar → leger → safety net → protective fence
Bar → brace → Dense mesh screen.Scaffold in the construction process, join in hanging top by shape brace.Brace inside and outside should respectively set one
It pays.The starting of brace should be set up from the second bottom of upright rod of opening.
The levelness of the verticality of correction upright bar in time and step layer leger during scaffold construction.Holding is remained the same from beginning to end
Step pitch, advance and transfer.In order to guarantee each upright bar uniform stressed of scaffold, upright bar should be symmetrical arranged with small cross bar.
After Pier Formwork is reinforced, support pinner position, elevation and anchor hole etc. are made according to template relative position
Built-in fitting position.Template and reinforcing bar can carry out concrete casting after supervising engineer's passed examination.Using slotting when casting
Enter formula vibrator vibration compacting, built-in fitting cannot be encountered when vibrating, in case built-in fitting shifts.
Pier top flowing water slope and support pinner absolute altitude, position give strict control in construction, set during concreting specially
People's nurse, the firm situation of observation bracket, template, reinforcing bar and built-in fitting etc. find to handle in time when loosening, deformation, displacement.
Need manually to cut loose concrete at bearing pad stone embedded bar before support template installation, and being stained with knot on reinforcing bar
Concrete laitance clean out, blown clean with air compressor machine.Branch backing plate uses wooden model, and the surface that wooden model is contacted with concrete must
Must be smooth, smooth, it such as reuses on the inside of wooden model plus follows closely sheet iron and should remain that its surfacing, shape are accurate, no
Spillage has enough strength and stiffness.When template is installed, top surface 5mm about low than bearing pad stone top surface designed elevation, mat stone
Top surface smoothes out.After template is installed, the plan-position at each position and elevation must be detected by survey crew after checking, Fang Kejin
The construction of row concrete.Bearing pad stone uses C40 concrete, carries out mixing in strict accordance with the concrete ratio of examination & approval in the construction process.Concrete
Enter mould using the method feeding of crane batch hopper, smear receipts face with iron after the completion of pouring, using the thin mould covering of plastics after concrete final set
And sprinkling maintenance, surface wettability is often kept during maintenance.
Before concretings, pile foundation and pier, abutment body joint concrete are subjected to dabbing, remove laitance and loose part,
It rinses well, and rebuilds connection reinforcing bar.
In order to ensure concrete construction quality, concrete is being equipped with the forced mixer of autoelectrinic metering system
Blending station centralized mixing is transported using concrete conveyance tank car, is pumped into mould.
Before formally pouring, through testing optimizing mixing proporiton, the technical parameters such as the slump, vibrating time, the number that vibrates are determined.It pours
Symmetrical horizontal slice carries out in the entire plane section of pier shaft when building.The deviation for paying attention to correcting built-in fitting simultaneously, guarantees concrete dense
Real and surface is smooth neat, no cushion block trace.
Before casting concrete, position, quantity and its tightness of cushion block of concrete bar protective layer, and specified special messenger are gone through
Make iterative testing, to ensure thickness of protection tier, the cushion block of component side and bottom surface is at least 4/m2, assembling reinforcement
Iron wire head must not protrude into protective layer.
Concreting uses automobile pumpdown, first uses cement mortar wet channels, then carry out concrete conveyance, to
Concrete continuous constantly exports, and just starts cloth when uniformly and not generating bubble.Before pouring pier concrete, bottom is first poured into
The 50mm thickness ratio of mud is slightly less than the cement mortar of concrete.Bridge pier height is 8.7m, the drop height degree that freely inclines when concreting
Concrete disintegration, foot bar control hierarchy thickness are prevented using tumbling barrel blanking no more than 2m.Pouring for concrete is connected using layering
The mode of continuous passage carries out, and lift height is not more than 300mm, pours off time no more than 30min, one-time-concreting forms, no
Obtain random indwelling construction joint.
The uniform vibration compacting of the concrete poured must not arbitrarily be encrypted into vibration point or leakage in time in concreting process
Vibration, every vibrating time, which is subject to, surface bleeding or does not emit air pocket, is usually no more than 30s, avoids over vibration.Suitably vibrate
Time can be judged by following phenomenon；Concrete no longer significantly sinks, and bubble no longer occurs, and concrete surface pulp is horizontal,
And template corner is filled up substantial.
When using plug-in type high speed vibrator vibrated concrete, vibrated using vertical point vibration mode.If vibrating spear need to be converted
Vibrating spear is vertically slowly extracted first, then vibrating spear is moved to again new position, must not be placed on vibrating spear and mix and stir by position
It puts down and drags in object, also not handy internal vibration stick is flat drags the mixture driven and accumulated at feed opening.
During vibrated concrete, the closely sealed situation of the stability and seam that check shuttering supporting is needed to be strengthened, is arranged
Special messenger is responsible for monitoring template, pipeline, reinforcing bar and built-in fitting, prevents from taking timely measure when bolt looseness, template deformation and be located
Reason.
Spacing of vibrating is controlled, poker vibrator should not exceed 1.5 times of its operating radius；To lightweight aggregate concrete, then
It should not exceed 1 times of its effect.The distance of vibrator to template should not exceed 0.5 times of its operating radius.Control concrete
Height of lift height pattern is at 1.25 times or so of vibrator effect partial length, and vibrate new one layer, should all inject first casting concrete 5
~10cm makes every effort to upper and lower level and combines closely.
Long 2/3~3/4 of stick is not to be exceeded in the depth of vibrator insertion concrete；Vibrating spear will twitch up and down in time, point
The uniform vibration compacting of layer will slowly pull out vibrating head, concrete is made to fill up cavity caused by vibrating head after vibrating well.Control
Vibrate program, first around after it is intermediate, and pay attention to low between concrete speading surrounding senior middle school, so that bubble is driven out of toward centre to the greatest extent, keep away
Exempt to be gathered at template.Pay attention to the concrete vibrating at protective layer mortar pad, cement mortar must be made sufficiently to wrap up；Or it takes
It vibrates a bit of method for first removing a bit of cushion block.In this way, it is possible to prevente effectively from surface generates thyridium or blackening at cushion block.
Emphasis reinforces the humidity and temperature control of concrete during concrete curing.After the completion of concreting, winter is adopted
Antifreezing measures are taken, curing film uses the dedicated curing film of concrete, and concrete exposure covers layer of plastic film and felt maintenance.
It is temporarily covered between the receipts face pressure photophase, reduces the exposure duration of surface concrete to the greatest extent, prevent surface moisture from evaporating.Concrete
It pours after finishing final set, places plastic bucket on each pier stud top of pier top, concrete is conserved using water clock mode.Often
It is taken under temperature and places plastic bucket in pier top, by water clock mode to concrete curing, pier shaft outside is moulded with concrete curing
Expect film covering.Dripping curing time must not be less than 28 day.
After the demoulding of pier stud side, pier stud leakage position is wrapped up using plastic film and felt immediately, seam areas
It is sealed using adhesive tape bonding, and is tightened using plastic packing belt.After the completion of pier stud concreting, curing time must not be less than 28
It.Curing film and felt package time are until superstructure all construction completions.
Processing for construction joint, to improve concrete durability, concrete component answers primary concreting to complete, before construction
The emergency measure that prevention cuts off the water, has a power failure must be carried out, avoids causing due to construction reason as far as possible going out in concreting process
Existing construction joint carries out concrete construction joint processing routine by code requirement: first is that processing should be cut when inevitable construction joint
The cement mortar and the weak layer of pine on layer concrete surface；Second is that the concrete surface application water handled through dabbing is rinsed well, but cannot
Ponding；Third is that palpus layer intensity to be processed could continue casting concrete after reaching 2.5Mpa, and concrete reaches after treatment of construction joints
The time of above-mentioned compression strength preferably passes through test and determines.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
The present invention will not be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The consistent widest scope of point.
Claims (10)
1. shaped form bridge pier Construction technology of fair-faced concrete, it is characterised in that: specific steps are as follows:
Step 1: bridge pier template is installed: Pier Formwork is rigid template of being formed, and the connection between Pier Formwork is connected by bolt
It connects, Pier Formwork lower part is also fixed on cushion cap with anchor bolt, and the top of Pier Formwork is fixed with cable wind rope oblique pull；
Step 2: pier stud reinforcing bar and installation of embedded parts: Pier Formwork determines supporting pad after the installation is completed, according to Pier Formwork position
Stone position and built-in fitting position support and also install reinforcing bar and anchor hole at pinner position and built-in fitting position, wherein built-in fitting is
Steel bar meter, the pouring type of built-in fitting are concreting, are also vibrated using poker vibrator in built-in fitting casting process
It is closely knit；
Step 3: bearing pad stone is constructed: the reinforcing bar of bearing pad stone position also sets up support template, support template after binding
The loose concrete at bearing pad stone embedded bar, and the concrete laitance air compressor machine for knot being stained on reinforcing bar are also cut before installation
It blows clean, then carries out bearing pad stone concreting, concrete casting enters mould using the method feeding of crane batch hopper, pours
Receipts face is smeared with iron after the completion；
Step 4: concreting: bridge pier concreting uses automobile pumpdown, first uses cement mortar wet channels,
Concrete conveyance is carried out again, constantly exports when the concrete continuous in pipeline and uniformly and when not generating bubble starts concrete
Cloth；Before pouring pier concrete, bottom first pours into the cement mortar of 50mm thickness, the ratio of mud of the cement mortar of bottom used
Less than the concrete water cement mortar ratio of mud；For the drop height degree that freely inclines when concreting no more than 2m, casting, which uses, prevents coagulation
The tumbling barrel blanking of soil isolation, also uses foot bar control hierarchy thickness；Concrete pour using layering continuously elapse by the way of into
Row, lift height are not more than 300mm, pour off time no more than 30min, bridge pier concreting is one-time-concreting molding.
2. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in step 1, mould
Plate seam crossing also posts double-sided adhesive and only starches.
3. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in step 1, pier
The cable wind rope that is surrounded by of column template is fixed, and at the top of Pier Formwork and middle part sets four cable wind ropes respectively and four direction is divided to fix
On ground concrete anchor pier, cable wind rope and ground-angle are 45 °, and flower basket bolt is arranged in cable wind rope root.
4. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in step 2, in advance
Embedded part includes elevation and anchor hole built-in fitting.
5. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in step 2, add
The built-in fitting of work is also handled by polishing, painting except mould agent, correction and the step of reinforcing before pouring.
6. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in step 3, branch
When seat template installation, top surface is 5mm lower than bearing pad stone top surface designed elevation.
7. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: bridge pier concrete pours
Before building, pile foundation and pier, abutment body joint concrete are subjected to dabbing, laitance and loose part is removed, rinses well, and the company of trimming
Reinforcing bar is connect, concrete is also in the mixing plant centralized mixing for being equipped with the forced mixer of autoelectrinic metering system, mixing knot
It is transported after beam using concrete conveyance tank car, is pumped into bridge pier template.
8. shaped form bridge pier Construction technology of fair-faced concrete according to claim 1, it is characterised in that: in bridge pier concrete
Using plug-in type high speed vibrator that the concrete vibrating poured is closely knit in casting process, every vibrating time is no more than 30s,
When using plug-in type high speed vibrator vibrated concrete, concrete vibrating mode is that vertical point vibration mode is vibrated, vibrating spear in process of vibrating
When evolution, vertically slowly vibrating spear is extracted first, then vibrating spear is moved to new position again.
9. shaped form bridge pier Construction technology of fair-faced concrete according to claim 8, it is characterised in that: control plug-in type is high
The spacing of vibrating of frequency vibrator, poker vibrator are not more than 1.5 times of its operating radius；The distance of vibrator to template is little
In 0.5 times of its operating radius, the height of lift height pattern of concrete is controlled at 1.25 times of vibrator effect partial length, is vibrated new
One layer, inject first 5~10cm of casting concrete.
10. shaped form bridge pier Construction technology of fair-faced concrete according to claim 9, it is characterised in that: the vibration of vibrator
The depth that tamper is inserted into concrete is no more than long 2/3~3/4 of stick, and vibrating spear will twitch up and down in time, and layering is uniformly vibrated close
It is real, after vibrating well, vibrating head is slowly pulled out, cavity caused by vibrating head is also filled up by concrete, is applied in process of vibrating
Intermediate sequence of vibrating after around row is first.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587779A (en) * | 2019-08-13 | 2019-12-20 | 温州大学 | Mechanical automatic machining device for steel structure concrete |
| CN111074754A (en) * | 2020-01-06 | 2020-04-28 | 中铁六局集团有限公司 | Pier column bare concrete construction method and pier column |
| CN112681610A (en) * | 2020-12-24 | 2021-04-20 | 上海建工二建集团有限公司 | Construction method of special-shaped concrete column |
| CN113494052A (en) * | 2021-07-06 | 2021-10-12 | 中铁二十局集团第六工程有限公司 | Construction method of solid pier column |
| CN114775409A (en) * | 2022-04-13 | 2022-07-22 | 中铁三局集团广东建设工程有限公司 | Pier column construction process based on temperature control |
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| CN114775409A (en) * | 2022-04-13 | 2022-07-22 | 中铁三局集团广东建设工程有限公司 | Pier column construction process based on temperature control |
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