CN106677069B - A kind of construction method of bridge pier integral formwork support one-shot forming structure - Google Patents
A kind of construction method of bridge pier integral formwork support one-shot forming structure Download PDFInfo
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- CN106677069B CN106677069B CN201611233074.5A CN201611233074A CN106677069B CN 106677069 B CN106677069 B CN 106677069B CN 201611233074 A CN201611233074 A CN 201611233074A CN 106677069 B CN106677069 B CN 106677069B
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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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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of construction method of bridge pier integral formwork support one-shot forming structure, comprise the following steps：1) cushion cap face handle, 2) pier stud construction cripple set up, 3) reinforcing bar system peace, 4) model sheetinstallat, 5) concreting, 6) form removable, health, 7) binder prestressed stretch-draw mud jacking.The present invention has the advantages that environment-friendly, easy for construction, cheap.
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 uses 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 obvious segmentation and connects stubble, if primary concreting outward appearance into
Type effect is undesirable；And in concreting, leakiness of disposably vibrating, at bridge pier variable cross-section with binder connecting portion steel
Muscle is closeer, and bell mouth shape anchor notch and binder prestressing force corrugated conduit gather with reinforcing bar, such as primary concreting, variable cross-section horn mouth
Standing beneath section is difficult vibration compacting.
In summary, 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, need the bridge pier integral formwork support one-shot forming knot for inventing that a kind of efficiency of construction is high, quality is secure badly at present
Structure and construction method.Constructed using the method, easy for construction and construction quality is high, has 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, make every effort to bridge pier one piece pouring molding, optimized construction procedure, improve construction efficiency, lift 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 are as follows：
1) cushion cap face is handled：According to the pier stud sideline of surveying and locating, using manually to Construction Joint face scope progress dabbing
Until exposing coarse aggregate, while the cement mortar on pier stud embedded bar top layer is cleared up, and rinsed well with high pressure clear water.Flushing finishes
Pier stud embedded bar is adjusted afterwards, ensures that reinforcing bar is straight, complies with 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 set up.Scaffold basis is fallen within cushion cap and firm ground, by montant, whippletree, adjustable bolt, flitch, adjustable
Jacking composition is saved, scaffold sets Crossing brace in its four sides by code requirement, and scaffold is set up according to fastener type pin hand
Frame regulation enforcement, surrounding and horizontal direction are respectively provided with safety guard net, and set up lower channel for above and below workmen；Construction surface
Platform springboard, workbench are set.
3) reinforcement fabrication and installation：The reinforcing bar of different construction parts stores classifiedly in reinforcement yard, and is numbered, pier
Post cage bar, stirrup and binder matrix tablet start to install after making shaping.Pre-buried bridge pier cage bar during bearing platform construction, and use and face
When support, carry out pier stud reinforcing bar colligation, be attached when pre-buried for pier stud cage bar spreading using straight screw sleeve.First colligation pier
Then column tie-bar lifts binder framework of steel reinforcement piece, matrix tablet and pier stud cage bar are welded shape by welder's welding to binder bottom position
It is integral, matrix tablet all colligation residue stirrup, construction muscle and encryption reinforcing bar after the completion of welding are treated, pre-buried PVC sleeve pipes simultaneously wear
Prestressing force bellows, prestressing force corrugated conduit use coordinate setting in advance, weld well word hoop or fixed using U-shaped card, such as
Steel-bar and stress technique corrugated conduit position conflicts, then follows cage bar and avoid prestressing force corrugated conduit, cuts stirrup, adjustment cage bar less,
Cut off the principle recovered in time afterwards.Reinforcement installation one-shot forming, firm stable after entirety is formed, binder reinforcing bar bottom is without in advance
Supporting module.
4) model sheetinstallat：Using set shaped steel formwork, including standard paragraphs template, loudspeaker mouth template, binder bed die, side form group
Into, formed by panel, flange, cross rib, perpendicular rib, draw-bar seat, arc reinforcement, channel-section steel, R plates, by processed in factory customization and
Into prestressed anchor notch position stays in advance to be set, and wherein horn mouth should carry out preassembling with binder linkage section template, it is ensured that construct
Matched moulds zero deflection, internal corner part connection are accurate in journey.Template is first polished, is derusted, brushes releasing agent；Then in cushion cap top surface
Release template outer edge, Rational choice regulating block, standard knot carry out standard section section spelling, by the masonry mortar on cushion cap or
Brick mold, as bottom adjusting template.Regulation steel form in bottom is first installed, further according to pier stud height selection standard section and regulating block
Integral assembling, 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
Reinforced.Fill variable cross-section section loudspeaker mouth template；Set up total sub-semigroup, installation variable cross-section horn mouth and binder connecting portion
Template, it is fixed with bottom vertical section template, then install binder end template, be attached, reinforce with bridge pier horn mouth, simultaneously
Bowl buckle scaffold jacking is adjusted, installs horn mouth side template.Attached vibrator is uniformly laid in template.
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete.
6) form removable, health：After pier stud concreting, watering maintenance was proceeded by every 2 hours or so.Mould
Plate removes the artificial progress with truck crane, classifies after form removable and is under lock and key, and goes to next pier stud construction week.Form removable
After the completion of, pier stud, binder are integrally wrapped up using plastic sheeting immediately, carry out fencing lawn.
7) binder prestressed stretch-draw mud jacking：When concrete strength reaches 90% and age is not less than 7 days, it can carry out pre-
Prestress steel strand lashing, and tensioning.
The beneficial effects of the invention are as follows:
(1) disposably by the colligation of bridge pier reinforcing bar and model sheetinstallat in place, and primary concreting concrete can reduce process ring
Section, reduce labor intensity, accelerating construction progress.
(2) compared with being segmented pouring construction, it can effectively avoid that joint part concrete leakiness, seam be obvious, segmentation concrete color
Phenomena such as difference is larger, it is ensured that Surface Quality of Concrete meets design requirement.
(3) one-time-concreting technique is used, secondary formwork difficulty can be reduced, avoids the secondary reinforcement installation of bridge pier binder, template
Install and pollution of the concreting to bottom finished product.
(4) accurately it is connected by being accurately positioned prestressing force corrugated conduit, anchor notch being reserved with template, post-stressed muscle
Laying increase the span of binder, local pressure is uneven (pier stud eccentric compression) at curved section horn mouth moulding, applies pre-
Stress enhances the resistance of bridge pier.
Brief description of the drawings
Fig. 1 is a kind of bridge pier integral formwork support one-shot forming agent structure schematic diagram of the present 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- workbenches, 5- flanges, 6- cross ribs, 7-
Perpendicular rib, 8- tapping pipes, the pre-buried bellowss of 9-, 10-PVC sleeve pipes, 11- montants, 12- cross bars, 13- Crossing braces, 14- can adjust spiral shell
Bolt, 15- flitches, 16- can adjust jacking, and 17- is to pull bar, 18- draw-bar seats, 19- arc reinforcements, 20- channel-section steels, 21-R plates, 22-
Attached vibrator.
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, welding technique requirement, large-scale steel form concatenation construction technique, binder post stretching are pre- in present embodiment
Stress tension technology etc. repeats no more, and emphasis illustrates the implementation of bridge pier integral formwork support one-shot forming structure installation of the present invention
Mode.
Fig. 1 is a kind of bridge pier integral formwork support one-shot forming agent structure schematic diagram of the present invention；Fig. 2 is the signal of standard paragraphs template
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. form.
Operating platform is by platform springboard 2, lower channel 3, the grade of workbench 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 form, attached vibrator 22.
Scaffold system is by montant 11, cross bar 12, Crossing brace 13, adjustable bolt 14, flitch 15, adjustable jacking 16 etc.
Composition.
Built-in fitting includes tapping pipe 8, pre-buried bellows 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 handled：According to the pier stud sideline of surveying and locating, using manually to Construction Joint face scope progress dabbing
Until exposing coarse aggregate, while the cement mortar on pier stud embedded bar top layer is cleared up, 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
Arrange scaffold.Double-pole scaffold is set up around pier stud surrounding closure, and vertically and horizontally spacing is 90 × 90cm, cross bar step pitch 120cm.Pin
Hand cradle basis is fallen within cushion cap and firm ground, and scaffold sets Crossing brace, scaffold in its four sides by code requirement
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
Above and below workmen.
3) reinforcing bar system is pacified：The reinforcing bar of different construction parts stores classifiedly in reinforcement yard, and is numbered, pier stud master
Muscle, stirrup and binder matrix tablet start to install after making shaping.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 conduit uses coordinate in advance
Positioning, weld 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, accurately, prestressed anchor notch position stays in advance to be set, and wherein horn mouth should be carried out pre- with binder linkage section template for graceful, control
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 stability.Template polishing, derusting, brush releasing agent；First install bottom regulation steel form (30cm or
50cm), further according to pier stud height selection standard section and regulating block integral assembling, and highly to divide by single pier stud four sides to be assembled into whole
Body big-size formwork is lifted, and is reinforced finally by corner Screw arbor with nut at both-ends.Fill variable cross-section section loudspeaker mouth template；Set up bowl buckle
Formula scaffold, installation variable cross-section horn mouth and binder connecting portion template, make it be fixed with bottom vertical section template, then install and be
Beam bottom mother plate, it is attached, reinforces with bridge pier horn mouth, while adjust jacking, installs horn mouth side template.Prestressed anchor groove position
Loudspeaker mouth template is put finally to install.
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete.Pier shaft concrete uses 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 are metal iron pipe, and length 3m can be according to live actual height spreading or dismounting.
6) form removable, health：Draw is produced to prevent in concrete that moisture evaporation is too fast, and ensures hydrated cementitious mistake
Journey is smoothed out, and after pier stud concreting, watering maintenance was 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, pier stud, binder are integrally wrapped up using plastic sheeting immediately, carry out fencing lawn, is 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 uses high speed strand pulling machine.Before tensioning clear up anchor cushion block on cement mortar and
Iron rust, and itself and ripple pore central perpendicularity are checked, if any deviation, with wedge-shaped steel cushion block.One end uses the big jack of 100t,
The other end uses the per share tensioning 5t respectively of small 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 handled：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 the cement mortar on pier stud embedded bar top layer is cleared up, and rinsed well with high pressure clear water；It is pre-buried to pier stud after flushing
Reinforcing bar is adjusted, and is ensured that reinforcing bar is straight, is complied with design requirement；
2) pier stud construction cripple is set up：Pier shaft surrounding sets up double-pole scaffold, and double-pole scaffold closes 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 adjustable jacking (16) form, scaffold its four sides by code requirement setting Crossing brace (13), surrounding and
Horizontal direction is respectively provided with safety guard net, and sets up lower channel (3) for above and below workmen；Construction surface sets platform springboard
And workbench (4) (2)；
3) reinforcement fabrication and installation：Pier stud cage bar, stirrup and binder matrix tablet start to install after making shaping；The bearing platform construction phase
Between pre-buried bridge pier cage bar, and use temporary support, carry out pier stud reinforcing bar colligation, straight spiral shell is used for pier stud cage bar spreading when pre-buried
Line sleeve is attached；Then first colligation pier stud stirrup lifts binder framework of steel reinforcement piece, welder's welding will to binder bottom position
Matrix tablet welds to form entirety with pier stud cage bar, treats colligation residue stirrup, construction muscle and encryption after the completion of matrix tablet whole welding
Reinforcing bar, pre-buried PVC sleeve pipes (10) simultaneously wear prestressing force bellows (9), and prestressing force corrugated conduit uses coordinate setting in advance, welding
Well word hoop is fixed using U-shaped card, when steel-bar and stress technique corrugated conduit position conflicts, then follows cage bar and avoids and in advance should
Power corrugated conduit, stirrup, adjustment cage bar are cut less, cuts off the principle recovered in time afterwards；Reinforcement installation one-shot forming, after forming entirety
Firm stable, binder reinforcing bar bottom is without 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) group
Into prestressed anchor notch position stays in advance to be set, and wherein horn mouth should carry out preassembling with binder linkage section template, it is ensured that construct
Matched moulds zero deflection, internal corner part connection are accurate in journey；Template is first polished, is derusted, brushes releasing agent；Then in cushion cap top surface
Release template outer edge, Rational choice regulating block, standard knot carry out standard section section spelling, by the masonry mortar on cushion cap or
Brick mold, as bottom adjusting template；Regulation steel form in bottom is first installed, further according to pier stud height selection standard section and regulating block
Integral assembling, 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；Fill variable cross-section section loudspeaker mouth template；Total sub-semigroup is set up, installation variable cross-section horn mouth is connected with binder
Position template, it is fixed with bottom vertical section template, then install binder end template, be attached, reinforce with bridge pier horn mouth,
Bowl buckle scaffold jacking is adjusted simultaneously, installs horn mouth side template；Attached vibrator (22) is uniformly laid in template；
5) concreting：Mould, one-time continuous cast are entered using automobile pump concrete；
6) form removable, health：After pier stud concreting, watering maintenance was proceeded by every 2 hours；Form removable by
Truck crane coordinates artificial progress, classifies after form removable and is under lock and key, and goes to next pier stud construction week；After the completion of form removable,
Pier stud, binder are integrally wrapped up using plastic sheeting immediately, 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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Inventor after: Zhao Ronggao Inventor after: Zhang Zhonghui Inventor after: Xiong Juan Inventor after: Li Ming Inventor after: Zeng Yunfeng Inventor after: Chen Shichao Inventor before: Wang Xinquan |
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Effective date of registration: 20180412 Address after: 330002 1352 Jinggangshan Avenue, Xihu District, Nanchang, Jiangxi. Patentee after: Road and bridge engineering Group Co.,Ltd of Jiangxi Province Address before: 310015 Hangzhou Wanda Commercial Center, Zhejiang, building 3, unit 1901, room 3 Patentee before: Hangzhou Jiang Run Science and Technology Ltd. |