CN106677069A - Construction method for overall formwork one-time forming structure of pier - Google Patents
Construction method for overall formwork one-time forming structure of pier Download PDFInfo
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- CN106677069A CN106677069A CN201611233074.5A CN201611233074A CN106677069A CN 106677069 A CN106677069 A CN 106677069A CN 201611233074 A CN201611233074 A CN 201611233074A CN 106677069 A CN106677069 A CN 106677069A
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- pier stud
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- pier
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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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a construction method for an overall formwork one-time forming structure of a pier. The method includes the following steps of (1) bearing platform surface treatment, (2) erection of a temporary scaffold for pier stud construction, (3) steel bar manufacturing and mounting, (4) formwork mounting, (5) concrete pouring, (6) formwork dismantling and curing, and (7) prestress tensioning and mortar pressing for tie beams. The construction method has the advantages of environmental friendliness, convenient construction, low manufacturing cost and the like.
Description
Technical field
The present invention relates to a kind of one-time formed construction method of bridge pier integral formwork support.
Background technology
At present, domestic overpass two-columned pier pier stud construction generally individually adopts H type twin columns, and mostly curve variable cross-section loudspeaker
Mouth bridge-type, and binder span is larger, pier stud binder is relatively conventional using prestressing force form, the queen post highly more than 10 meters
The construction of H types pier stud is more using segmentation casting method, and secondary formwork is difficult and leaves substantially segmentation and connects stubble, if primary concreting outward appearance into
Type effect is undesirable；And in concreting, leakiness of disposably vibrating, with binder connecting portion steel at bridge pier variable cross-section
Muscle is closeer, and bell mouth shape anchor notch and binder prestress pipe gather with reinforcing bar, such as primary concreting, variable cross-section horn mouth lower section
Vertical section is difficult vibration compacting.
In sum, existing two-columned pier low construction efficiency is not high, and construction quality is difficult to ensure that, exists substantial amounts of
Open defect.In consideration of it, needing the bridge pier integral formwork support one-shot forming knot that a kind of efficiency of construction of invention is high, quality is secure badly at present
Structure and construction method.Constructed using the method, easy construction and construction quality are high, with certain economic technology benefit.
The content of the invention
It is an object of the invention to provide the bridge pier integral formwork support one-shot forming knot that a kind of efficiency of construction is high, quality is secure
The construction method of structure, makes every effort to bridge pier one piece and pours molding, and optimized construction procedure improves construction efficiency, lifts engineering construction
Quality.
The purpose of the present invention is achieved through the following technical solutions:A kind of bridge pier integral formwork support one-shot forming structure is applied
Work method, its main construction procedure is as follows：
1) cushion cap face is processed：According to the pier stud sideline of surveying and locating, using manually to Construction Joint face scope carrying out dabbing
Until exposing coarse aggregate, while clearing up the cement mortar on pier stud embedded bar top layer, and rinsed well with high pressure clear water.Flushing is finished
Pier stud embedded bar is adjusted afterwards, it is ensured that reinforcing bar is straight so as to meet design requirement.
2) pier stud construction cripple is set up：Pier shaft surrounding sets up double-pole scaffold, and double-pole scaffold surrounds pier stud four
Week closes and sets up.Scaffold basis is fallen within cushion cap and firm ground, by montant, whippletree, adjustable bolt, flitch, adjustable
Section jacking composition, scaffold press code requirement setting Crossing brace in its four side, and scaffold is set up according to fastener type foot handss
Frame regulation enforcement, surrounding and horizontal direction are respectively provided with safety guard net, and it is upper and lower for workmen to set up lower channel；Construction surface
Platform springboard, work platformses are set.
3) reinforcing bar system peace：The reinforcing bar of different construction parts is stored classifiedly in reinforcement yard, and is numbered, pier stud master
Muscle, stirrup and binder matrix tablet make and start after molding installation.Pre-buried bridge pier cage bar during bearing platform construction, and using interim
Support, carries out pier stud reinforcing bar colligation, for pier stud cage bar spreading is attached using straight screw sleeve when pre-buried.First colligation pier stud hoop
Then muscle lifts binder framework of steel reinforcement piece to binder bottom position, and matrix tablet is welded to form whole by welder's welding with pier stud cage bar
Body, treats colligation residue stirrup, construction muscle and encryption reinforcing bar after the completion of matrix tablet whole welding, and pre-buried PVC sleeve pipes simultaneously wear pre- answering
Power corrugated tube, prestressing force corrugated tube welds well word hoop or fixed using U-shaped card, such as reinforcing bar to coordinate setting is adopted in advance
Conflict with prestress pipe position, then follow cage bar and avoid corrugated conduit, stirrup, adjustment cage bar are cut less, recover in time after cutting off
Principle.Reinforcement installation one-shot forming, forms firm stable after entirety, and binder reinforcing bar bottom is without the need for leading supporting module.
4) model sheetinstallat：Using set shaped steel formwork, including standard paragraphs template, loudspeaker mouth template, binder bed die, side form group
Into by panel, flange, cross rib, perpendicular rib, draw-bar seat, arc reinforcement, channel-section steel, R plates, being formed by processing customization in factory, in advance
Stress anchor notch position stays set in advance, and wherein horn mouth should carry out preassembling with binder linkage section template, it is ensured that in work progress
Matched moulds zero deflection, internal corner part connection are accurate.Template is first polished, is eliminated rust, is brushed releasing agent；Subsequently release in cushion cap top surface
Template outer edge, Rational choice regulating block, standard knot carry out standard section section spelling, by the masonry mortar on cushion cap or brick tire
Mould, as bottom adjusting template.Bottom is first installed and adjusts steel form, further according to pier stud height selection standard section and regulating block entirety
Assembly, and highly divide the assembled integral big-size formwork in four sides to be lifted by single pier stud, pull bar is carried out finally by corner
Reinforce.Dress variable cross-section section loudspeaker mouth template；Total sub-semigroup is set up, variable cross-section horn mouth and binder connecting portion mould are installed
Plate so as to fix with bottom vertical section template, then binder end template is installed, it is attached, reinforces with bridge pier horn mouth, while adjusts
Whole bowl buckle scaffold jacking, installs horn mouth side template.It is uniform in template to lay attached vibrator.
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete.
6) form removable, health preserving：After pier stud concreting is finished, watering maintenance was proceeded by every 2 hours or so.Mould
Plate is removed and manually carried out with truck crane, and classification after form removable is under lock and key, and goes to next pier stud construction week.Form removable
After the completion of, immediately pier stud, binder are integrally wrapped up using plastic sheeting, carry out fencing lawn.
7) binder prestressed stretch-draw mud jacking：When concrete strength reaches 90% and age is not less than 7 days, can carry out pre-
Prestress steel strand lashing, and tensioning.
The invention has the beneficial effects as follows:
(1) it is disposable by the colligation of bridge pier reinforcing bar and model sheetinstallat in place, and primary concreting concrete can reduce operation ring
Section, reduces labor intensity, accelerating construction progress.
(2) compared with segmentation pouring construction, can be prevented effectively from joint part concrete leakiness, seam substantially, segmentation concrete color
Differ from the phenomenon such as larger, it is ensured that Surface Quality of Concrete meets design requirement.
(3) using one-time-concreting technique, secondary formwork difficulty can be reduced, it is to avoid the secondary reinforcement installation of bridge pier binder, template
Install and pollution of the concreting to bottom finished product.
(4) accurately connected by being accurately positioned prestressing force corrugated conduit and the reserved anchor notch of template, post-stressed muscle
Laying increase the span of binder, local pressure uneven (pier stud eccentric compression) at curved section horn mouth moulding applies pre-
Stress enhances the resistance of bridge pier.
Description of the drawings
Fig. 1 is a kind of bridge pier integral formwork support one-shot forming agent structure schematic diagram of the invention；
Fig. 2 is standard paragraphs template schematic diagram；
Fig. 3 is loudspeaker mouth template schematic diagram；
Fig. 4 is construction flow chart of the present invention.
Description of reference numerals：1- panels, 2- platform springboards, 3- lower channels, 4- work platformses, 5- flanges, 6- cross ribs, 7-
Perpendicular rib, 8- tapping pipes, the pre-buried corrugated tubes of 9-, 10-PVC sleeve pipes, 11- montants, 12- cross bars, 13- Crossing braces, 14- scalable spiral shells
Bolt, 15- flitches, 16- scalable jackings, 17- is to pull bar, 18- draw-bar seats, 19- arc reinforcements, 20- channel-section steels, 21-R plates, 22-
Attached vibrator.
Specific embodiment
The present invention is described further with reference to embodiment.The explanation of following embodiments is only intended to help and understands this
Invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, also
Some improvement and modification can be carried out to the present invention, these are improved and modification also falls into the protection domain of the claims in the present invention
It is interior.
Reinforcing bar colligation, solder technology require that large-scale steel form concatenation construction technique, binder post stretching is pre- in present embodiment
Stress tension technology etc. is repeated no more, and emphasis illustrates the enforcement that bridge pier integral formwork support one-shot forming structure according to the present invention is installed
Mode.
Fig. 1 is a kind of bridge pier integral formwork support one-shot forming agent structure schematic diagram of the invention；Fig. 2 is that standard paragraphs template is illustrated
Figure；Fig. 3 is loudspeaker mouth template schematic diagram；
Bridge pier integral formwork support one-shot forming structure shown in reference picture 1-3, by operating platform, set shaped steel formwork, scaffold
System, built-in fitting etc. are constituted.
Operating platform is by platform springboard 2, lower channel 3, the grade of work platformses 4 composition.
Set shaped steel formwork is made up of standard paragraphs template and horn mouth template, by panel 1, flange 5, cross rib 6, perpendicular rib 7, drawing
Pole socket 18, arc reinforcement 19, channel-section steel 20, R plates 21 are constituted, attached vibrator 22.
Scaffold system is by montant 11, cross bar 12, Crossing brace 13, adjustable bolt 14, flitch 15, scalable jacking 16 etc.
Composition.
Built-in fitting includes tapping pipe 8, pre-buried corrugated tube 9, PVC sleeve pipes 10 etc..
As shown in figure 4, bridge pier integral formwork support one-shot forming structure construction step is as follows：
1) cushion cap face is processed：According to the pier stud sideline of surveying and locating, using manually to Construction Joint face scope carrying out dabbing
Until exposing coarse aggregate, while clearing up the cement mortar on pier stud embedded bar top layer, and rinsed well with high pressure clear water.
2) pier stud construction cripple is set up：Pier shaft surrounding is set up double using Φ 48mm × 3.0mm design of coupler scaffold
Row's scaffold.Double-pole scaffold around pier stud surrounding closure set up, vertically and horizontally spacing be 90 × 90cm, cross bar step pitch 120cm.Foot
Hand cradle basis is fallen within cushion cap and firm ground, and scaffold presses code requirement and arranges Crossing brace, scaffold in its four sides
Set up according to design of coupler scaffold regulation enforcement, surrounding and horizontal direction are respectively provided with safety guard net, and set up lower platform
It is upper and lower for workmen.
3) reinforcing bar system peace：The reinforcing bar of different construction parts is stored classifiedly in reinforcement yard, and is numbered, pier stud master
Muscle, stirrup and binder matrix tablet make and start after molding installation.Then first colligation pier stud stirrup lifts to binder bottom position
Matrix tablet and pier stud cage bar are welded to form entirety by binder framework of steel reinforcement piece, welder's welding, treat matrix tablet all after the completion of welding
Colligation residue stirrup, construction muscle and encryption reinforcing bar, and prestressing force corrugated conduit is worn, prestressing force corrugated tube is in advance using coordinate
Positioning, welds well word hoop or fixed using U-shaped card.
4) model sheetinstallat：Using set shaped steel formwork, formed by processing customization in factory, especially horn mouth curved section line style stream
Freely, graceful, control is accurate, and prestressed anchor notch position stays set in advance, and wherein horn mouth should carry out pre- with binder linkage section template
It is assembled, it is ensured that matched moulds zero deflection, internal corner part connection are accurate in work progress.Bridge abutment moulding plate mainly by regulating block (10cm,
30cm, 50cm, 100cm), standard knot, horn mouth variable cross-section curved section template, binder bed die, side form composition.There is foot after assembling
Enough rigidity, strength and stabilities.Template polishing, rust cleaning, brushing releasing agent；First install bottom adjust steel form (30cm or
50cm), further according to pier stud height selection standard section and regulating block integral assembling, and by single pier stud highly divide four sides be assembled into it is whole
Body big-size formwork is lifted, and is reinforced finally by corner Screw arbor with nut at both-ends.Dress variable cross-section section loudspeaker mouth template；Set up bowl button
Formula scaffold, installs variable cross-section horn mouth and binder connecting portion template so as to fix with bottom vertical section template, then installs and be
Beam bottom mother plate, is attached, reinforces with bridge pier horn mouth, while adjusting jacking, installs horn mouth side template.Prestressed anchor groove position
Put loudspeaker mouth template finally to install.
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete.Pier shaft concrete adopts laminated pouring,
Every layer of THICKNESS CONTROL is in 30~50cm.Pier top reinforced mesh mesh 10cm × 10cm, in construction to automotive pump conveying tube end
Spreading vertical tube, a diameter of 80mm of hard tube, material is metal iron pipe, and length is 3m, can be according to live actual height spreading or dismounting.
6) form removable, health preserving：Moisture evaporation is too fast and produce draw in prevent concrete, and ensures hydrated cementitious mistake
Journey is smoothed out, and after pier stud concreting is finished, watering maintenance is proceeded by every 2 hours or so.When concrete strength reaches
Pier Formwork is removed to 2.5MPa, binder bed die should can bear it from gravity and other possible superimposed loads in concrete strength
Shi Fangke is removed.After the completion of form removable, immediately pier stud, binder are integrally wrapped up using plastic sheeting, carry out fencing lawn, supported
The shield phase is not less than 7 days.
7) binder prestressed stretch-draw mud jacking：When concrete strength reaches 90% and age is not less than 7 days, prestressing force is carried out
Steel stranded wire penetrating adapter, and tensioning.Prestress wire lashing adopts high speed strand pulling machine.Before tensioning clear up anchor cushion block on cement mortar and
Rust, and itself and ripple pore central perpendicularity are checked, if any deviation, with wedge shape steel cushion block.One end adopts the big jack of 100t,
The other end adopts the per share tensioning 5t respectively of little jack, then big jack one-end tension.
Claims (1)
1. a kind of construction method of bridge pier integral formwork support one-shot forming structure, it is characterised in that comprise the following steps：
1) cushion cap face is processed：According to the pier stud sideline of surveying and locating, dabbing is carried out to Construction Joint face scope until exposing thick bone
Material, while clearing up the cement mortar on pier stud embedded bar top layer, and is rinsed well with high pressure clear water；Flushing is pre-buried to pier stud after finishing
Reinforcing bar is adjusted, it is ensured that reinforcing bar is straight so as to meet design requirement；
2) pier stud construction cripple is set up：Pier shaft surrounding sets up double-pole scaffold, and double-pole scaffold is closed around pier stud surrounding
Conjunction is set up；Scaffold basis is fallen within cushion cap and firm ground, by montant (11), whippletree (12), adjustable bolt (14), wood
Side (15) and scalable jacking (16) constitute, scaffold its four sides press code requirement setting Crossing brace (13), surrounding and
Horizontal direction is respectively provided with safety guard net, and it is upper and lower for workmen to set up lower channel (3)；Construction surface arranges platform springboard
And work platformses (4) (2)；
3) reinforcing bar system peace：Pier stud cage bar, stirrup and binder matrix tablet make and start after molding installation；It is pre-buried during bearing platform construction
Bridge pier cage bar, and temporary support is adopted, pier stud reinforcing bar colligation is carried out, for pier stud cage bar spreading adopts straight screw sleeve when pre-buried
It is attached；First colligation pier stud stirrup lifts binder framework of steel reinforcement piece to binder bottom position, then, and welder's welding is by matrix tablet
Weld to form entirety with pier stud cage bar, treat colligation residue stirrup, construction muscle and encryption reinforcing bar after the completion of matrix tablet whole welding, in advance
Bury PVC sleeve pipes (10) and wear prestressing force corrugated tube (9), prestressing force corrugated tube welds well word hoop to coordinate setting is adopted in advance
Or it is fixed using U-shaped card, when steel-bar and stress technique pipeline location conflicts, then follow cage bar and avoid corrugated conduit, cut less
Stirrup, adjustment cage bar, the principle recovered in time after cutting off；Reinforcement installation one-shot forming, forms firm stable after entirety, binder steel
Muscle bottom is without the need for leading supporting module；
4) model sheetinstallat：Using set shaped steel formwork, including standard paragraphs template, loudspeaker mouth template, binder bed die and side form, by face
Plate (1), flange (5), cross rib (6), perpendicular rib (7), draw-bar seat (18), arc reinforcement (19), channel-section steel (20) and R plates (21), in advance
Stress anchor notch position stays set in advance, and wherein horn mouth should carry out preassembling with binder linkage section template, it is ensured that in work progress
Matched moulds zero deflection, internal corner part connection are accurate；Template is first polished, is eliminated rust, is brushed releasing agent；Subsequently release in cushion cap top surface
Template outer edge, Rational choice regulating block, standard knot carry out standard section section spelling, by the masonry mortar on cushion cap or brick tire
Mould, as bottom adjusting template；Bottom is first installed and adjusts steel form, further according to pier stud height selection standard section and regulating block entirety
Assembly, and highly divide the assembled integral big-size formwork in four sides to be lifted by single pier stud, finally by corner to pull bar (17)
Reinforced；Dress variable cross-section section loudspeaker mouth template；Total sub-semigroup is set up, variable cross-section horn mouth and binder connecting portion are installed
Template so as to fix with bottom vertical section template, then binder end template is installed, it is attached, reinforces with bridge pier horn mouth, while
Adjustment bowl buckle scaffold jacking, installs horn mouth side template；It is uniform in template to lay attached vibrator (22)；
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete；
6) form removable, health preserving：After pier stud concreting is finished, watering maintenance was proceeded by every 2 hours；Form removable by
Truck crane coordinates manually to be carried out, and classification after form removable is under lock and key, and goes to next pier stud construction week；After the completion of form removable,
Immediately pier stud, binder are integrally wrapped up using plastic sheeting, carry out fencing lawn；
7) binder prestressed stretch-draw mud jacking：When concrete strength reaches 90% and age is not less than 7 days, prestressing force can be carried out
Steel stranded wire penetrating adapter, and tensioning.
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| CN201611233074.5A CN106677069B (en) | 2016-12-28 | 2016-12-28 | A kind of construction method of bridge pier integral formwork support one-shot forming structure |
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| CN201611233074.5A CN106677069B (en) | 2016-12-28 | 2016-12-28 | A kind of construction method of bridge pier integral formwork support one-shot forming structure |
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| CN106677069A true CN106677069A (en) | 2017-05-17 |
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| CN109235261A (en) * | 2018-10-31 | 2019-01-18 | 广东省交通规划设计研究院股份有限公司 | Bridge tower builds device and bridge tower building method |
| CN110091124A (en) * | 2019-04-08 | 2019-08-06 | 湖北时瑞达重型工程机械有限公司 | A kind of curved face part building technology of bridge flower vase type pier stud mold |
| CN110158548A (en) * | 2019-06-11 | 2019-08-23 | 许昌水利建筑工程有限公司 | A kind of sluice steel form and its arrangement and method for construction |
| CN110172915A (en) * | 2019-05-20 | 2019-08-27 | 中交路桥华东工程有限公司 | A kind of high tower shaped form crossbeam Joint Re-bar Construction |
| CN110216791A (en) * | 2019-05-18 | 2019-09-10 | 陕西建工第五建设集团有限公司 | Steel reinforcement cage and the whole straight positioning of anchor method of steel form |
| CN110396937A (en) * | 2019-08-06 | 2019-11-01 | 中铁二十三局集团第三工程有限公司 | The asynchronous construction of hollow thin-walled high pier binder pier beam |
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