CN106120561B - A kind of cast-in-situ box girder template construct installation method - Google Patents
A kind of cast-in-situ box girder template construct installation method Download PDFInfo
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- CN106120561B CN106120561B CN201610517843.8A CN201610517843A CN106120561B CN 106120561 B CN106120561 B CN 106120561B CN 201610517843 A CN201610517843 A CN 201610517843A CN 106120561 B CN106120561 B CN 106120561B
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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 relates to a kind of cast-in-situ box girder template construct installation method, including：1) cast-in-situ box girder template construct, cast-in-situ box girder template is all made using plain form；The peripheral template that chamber template is located at support frame periphery by multigroup support frame for being uniformly arranged along its longitudinal direction and enclosing is constituted；2) cast-in-situ box girder model sheetinstallat；Chamfering one-shot forming on the outside of the installation of end template, chamber template, flange plate template and side template, drip and the pontic edge of a wing is carried out successively.In the present invention, cast-in-situ box girder template is all made using plain form, is had the advantages that from heavy and light, breadth is big, intensity is high, the demoulding is easy, pour rear surface smooth and beautiful appearance, have good workability, more suitable for large bridge construction；Cast-in-situ box girder template construct installation method of the present invention is simple, easy construction, and chamfering can be integrally formed when pouring on the outside of drip and the pontic edge of a wing, and construction quality is high.
Description
Technical field
The present invention relates to technical field of bridge construction, more particularly to a kind of cast-in-situ box girder template construct installation method.
Background technology
In bridge construction, the box beam of reinforced concrete structure is divided into prefabricated case beam and cast-in-situ box girder, and wherein cast-in-situ box girder is more
For Large Scale and Continuous bridge construction, its work progress is：Bracket basis construction-support installation-end template installation-pre-pressing bracket-
Precompressed unloads-adjusted end template absolute altitude-bottom plate and web reinforcement and installed under prestressing-side template and inner template (chamber template) peace
Fill-pour bottom plate and web concrete-dismounting inner template-roof steel bar and installed under prestressing-pour concrete roof-health-
Tensioning-hole path pressure grouting-end-blocking-support removing.
Currently used for cast-in-situ box girder template more use steel form, its exist from great, seam it is many, pour rear surface quality
Not good, the demoulding is difficult, the shortcoming that the number of turnover is low, service life is short.In addition, in bridge construction, drip and pontic chamfering
Need to be using dedicated templates construction, high processing costs, work progress is complicated.
The content of the invention
The invention provides a kind of cast-in-situ box girder template construct installation method, cast-in-situ box girder template all uses plain form
Make, have the advantages that from heavy and light, breadth is big, intensity is high, the demoulding is easy, pour rear surface smooth and beautiful appearance, have good workability, more
It is suitable for large bridge construction；Cast-in-situ box girder template construct installation method of the present invention is simple, easy construction, drip and
Chamfering can be integrally formed when pouring on the outside of the pontic edge of a wing, and construction quality is high.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of cast-in-situ box girder template construct installation method, comprises the following steps：
1) cast-in-situ box girder template construct；
A, cast-in-situ box girder template include be placed in pontic bottom end template, be placed in inside pontic chamber template, be placed in bridge
The side template in the outside of body two and the flange plate template for being placed in pontic both sides overhanging end bottom；Cast-in-situ box girder template is all using clear
Water template construct, to reduce form joint, in the case where being dimensioned for, the preferential maximum specification from 2440m × 1220mm is clear
Water template；
B, end template, side template are plane template, flange plate template by plane main body template and outside baffle combination
Form, respectively by design size excision forming；
C, chamber template are located at the periphery of support frame periphery by multigroup support frame for being uniformly arranged along its longitudinal direction and enclosing
Template is constituted；Support frame is first made, every group of support frame is made up of skeleton, perpendicular support and diagonal brace；Skeleton, perpendicular support and diagonal brace are adopted
Made of flitch, its middle skeleton is set added respectively by the end to end agent structure for constituting support frame of multistage flitch, and junction
Gu plate is reinforced；Several perpendicular support and the diagonal brace intersected are uniformly arranged in the agent structure of support frame；Between multigroup support frame is pressed
Anomaly row is fixed on workbench, and the plain form being cut to size then is sequentially fixed at into formation on the outside of support frame
Peripheral template；
2) cast-in-situ box girder model sheetinstallat；
A, install before each position template is cut after the section that exposes using water-fast phenolic aldehyde series paint brushing three times, such as send out
Existing template surface has cut or scratch, and brush phenolic paint is also mended simultaneously；
B, end template are installed；
The foundation construction of full framing is first carried out, then full framing is installed, full framing uses bowl buckle scaffold, and it is pushed up
Portion is respectively equipped with adjustable diameter and screw adjusting bar and jacking；I-steel is uniformly longitudinally laid along pontic by jacking, spacing is 0.5~
0.7m；Along the laterally homogeneous laying flitch of pontic at the top of I-steel, spacing is 0.4~0.5m；End template is laid on flitch；
When laying end template, it is greater than pontic beam bottom width degree along the horizontal width of pontic, and end template both sides exceed respectively
Pontic beam bottom side 0.3~0.5m of sideline, for installing side template on end template；End template splicing seams will be in length and breadth into line, it is to avoid
The faulting of slab ends occurred between fissure of displacement phenomenon, each piece of end template is highly no more than 1mm；When seam areas pastes sponge adhesive tape to prevent pouring
Spillage；
After end template laying is finished, plane setting-out is carried out, a test point is set at interval of 5m along end template vertical, horizontal, entirely
Planar survey end template vertical, horizontal absolute altitude, is then adjusted to designed elevation according to measurement result by end template；End template Pass line adjustment
After finishing, an absolute altitude is detected again, and position undesirable to absolute altitude carries out secondary adjustment, will until meeting design comprehensively
Ask；
After the completion of end template Pass line adjustment, load precompressed is carried out；Then bed die plate surface is arranged, checked smooth
After degree, splicing seams smooth degree, absolute altitude all meet the requirements, comprehensive brushing releasing agent；
C, chamber model sheetinstallat；
Box beam baseplate reinforcing bar, web reinforcement and crossbeam is prestressed, reinforced install after, case is determined by surveying setting-out
The center line and edge line of room model sheetinstallat；Then chamber template is installed；Entered at chamber template splicing position using galvanized iron sheet
Row is fixedly connected, it is ensured that the bulk strength of chamber template；
D, flange plate template, side template are installed；
During flange plate model sheetinstallat, adjustable perpendicular support is set in its bottom；Below pontic flange plate, work at the top of full framing
Multiple tracks channel-section steel is longitudinally uniformly arranged on word steel along pontic, channel-section steel is positioned with I-steel spot welding, then the welded limiting on the outside of channel-section steel
Bar plays fixation to channel-section steel；Adjustable perpendicular support is used for along pontic using support of the top provided with adjustable diameter and screw adjusting bar and jacking, jacking
Longitudinal direction sets up flitch, is transversely provided with thin flitch along pontic between flitch and flange plate template, flange plate template is laid on thin flitch
Inner side；Frame bottom welds cushion block, and cushion block, which is clamped in channel-section steel, realizes fixed supporting role；The outer side shield peace of flange plate template
Install after finishing, to flange plate template complete detection absolute altitude and line style, it is ensured that line style is attractive in appearance after the construction of pontic flange plate；
Side template is installed；Pontic lateral edge line is made after in-site measurement setting-out according to design size, then installation side
Template；The same support for being provided with adjustable diameter and screw adjusting bar and jacking using top is held out against on the outside of side template along bridge as adjustable diagonal bracing
On the longitudinally disposed flitch of body, the thin flitch laterally set along pontic is additionally provided between flitch and side template, side template is laid on
On the inside of thin flitch, the triangle gap between thin flitch and flitch squeezes tight using timber wedge；Adjustable diagonal bracing bottom is held out against in channel-section steel
Towards the side of side template, side template pastes spillage when sponge adhesive tape prevents from pouring with end template seam areas；
Chamfering one-shot forming on the outside of e, drip and the pontic edge of a wing；
It is 2 semi-circular pieces along center line subdivision, apart from flange plate end using a diameter of 30~40mm pvc pipe
At 100~150mm, pvc pipe cut ends side and flange plate template alignment after splitting are fixed on flange plate template with tingle
Upper surface, for the one-shot forming when pouring of pontic edge of a wing bottom drip；
It is 4 1/4 circular arc parts along center line subdivision, by 1/4 circular arc using a diameter of 110~120mm pvc pipe
Part circular arc faces outwardly the end for being fixed on flange plate template upper surface with tingle respectively, is being poured for chamfering on the outside of the pontic edge of a wing
When one-shot forming.
Compared with prior art, the beneficial effects of the invention are as follows：
1) cast-in-situ box girder template is all made using plain form, and its is lightweight, is constructed more suitable for large bridge；Breadth
Greatly, seam quantity can be reduced, formwork efficiency is improved；Intensity is high, not warpage, it is indeformable, do not ftracture, the number of turnover is more, uses the longevity
Life length, reduces construction cost；It is compared with steel form in addition, and the demoulding is easy, pours rear surface quality height, and have good workability；
2) cast-in-situ box girder template construct installation method of the present invention is simple, easy construction, outside drip and the pontic edge of a wing
Side chamfering can be integrally formed when pouring, and construction quality is high.
Brief description of the drawings
Fig. 1 is cast-in-situ box girder model sheetinstallat structural representation of the present invention.(pontic cross section)
Fig. 2 is the A portions enlarged drawing in Fig. 1.
Fig. 3 is the structural representation of support frame of the present invention.
In figure：1. the flitch 7. of full framing basis 2. full framing, 3. adjustable diameter and screw adjusting bar, 4. jacking, 5. I-steel 6.
The peripheral side template 10. of template 9. of 84. securing plate of the skeleton 82. of 8. chamber template of end template 81. 83. diagonal brace of perpendicular support 85.
The channel-section steel 16. of chamfering 15. on the outside of flange plate template 11. the is adjustable perpendicular pontic edge of a wing of support 12. adjustable diagonal bracing 13. drip 14.
The thin flitch of 17. pontic of gag lever post 18.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of cast-in-situ box girder template construct installation method of the present invention, comprises the following steps：
1) cast-in-situ box girder template construct；
A, cast-in-situ box girder template include be placed in the bottom of pontic 17 end template 7, be placed in inside pontic 17 chamber template 8,
It is placed in the side template 9 in 17 liang of outsides of pontic and is placed in the flange plate template 10 of the both sides overhanging end bottom of pontic 17；Cast-in-situ box girder
Template is all made using plain form, to reduce form joint, in the case where being dimensioned for it is preferential from 2440m ×
1220mm maximum specification plain form；
B, end template 7, side template 9 are plane template, flange plate template 10 by plane main body template and outer side shield
Combine, respectively by design size excision forming；
C, as shown in Fig. 2 chamber template 8 is by multigroup support frame for being uniformly arranged along its longitudinal direction and encloses and is located at support frame
The peripheral template 85 of periphery is constituted；Support frame is first made, every group of support frame is made up of skeleton 81, perpendicular support 82 and diagonal brace 83；
Skeleton 81, perpendicular support 82 and diagonal brace 83 are made using flitch, and its middle skeleton 81 constitutes support frame by multistage flitch is end to end
Agent structure, and junction sets securing plate 84 and reinforces respectively；Several perpendicular support 82 is uniformly arranged in the agent structure of support frame
And the diagonal brace 83 intersected；Multigroup support frame is fixed on workbench by spacing is parallel, then will be cut to size
Plain form, which is sequentially fixed on the outside of support frame, forms peripheral template 85；
2) cast-in-situ box girder model sheetinstallat；
A, install before each position template is cut after the section that exposes using water-fast phenolic aldehyde series paint brushing three times, such as send out
Existing template surface has cut or scratch, and brush phenolic paint is also mended simultaneously；
B, end template 7 are installed；
The basis 1 for first carrying out full framing is constructed, and then installs full framing 2, and full framing 2 uses bowl buckle scaffold,
Its top is respectively equipped with adjustable diameter and screw adjusting bar 3 and jacking 4；I-steel 5, spacing are uniformly longitudinally laid along pontic 17 by jacking 4
For 0.5~0.7m；At the top of I-steel 5 along the laterally homogeneous laying flitch 6 of pontic 17, spacing is 0.4~0.5m；On flitch 6
Lay end template 7 in face；
When laying end template 7, it is greater than pontic beam bottom width degree, the both sides of end template 7 difference along the horizontal width of pontic 17
Beyond pontic beam bottom side 0.3~0.5m of sideline, for installing side template 9 on end template 7；The splicing seams of end template 7 will in length and breadth into
Line, it is to avoid the faulting of slab ends occurred between fissure of displacement phenomenon, each piece of end template 7 is highly no more than 1mm；Seam areas paste sponge adhesive tape with
Spillage when preventing pouring；
After the laying of end template 7 is finished, plane setting-out is carried out, a test point is set at interval of 5m along the vertical, horizontal of end template 7,
The measurement vertical, horizontal absolute altitude of end template 7, is then adjusted to designed elevation according to measurement result by end template 7 comprehensively；End template 7 is marked
After height adjustment is finished, an absolute altitude is detected again, position undesirable to absolute altitude carries out secondary adjustment, until meet comprehensively
Design requirement；
After the completion of the Pass line adjustment of end template 7, load precompressed is carried out；Then the surface of end template 7 is arranged, checked smooth
After degree, splicing seams smooth degree, absolute altitude all meet the requirements, comprehensive brushing releasing agent；
C, chamber template 8 are installed；
Box beam baseplate reinforcing bar, web reinforcement and crossbeam is prestressed, reinforced install after, case is determined by surveying setting-out
Center line and edge line that room template 8 is installed；Then chamber template 8 is installed；Galvanized iron sheet is used at the splicing of chamber template 8 position
It is fixedly connected, it is ensured that the bulk strength of chamber template 8；
D, flange plate template 10, side template 9 are installed；
When flange plate template 10 is installed, adjustable perpendicular support 11 is set in its bottom；Below the flange plate of pontic 17, full framing
Multiple tracks channel-section steel 15 is uniformly arranged along the longitudinal direction of pontic 17 on 2 top I-steel 5, channel-section steel 15 is positioned with I-steel spot welding, then in groove
The outside welded limiting bar 16 of steel 15 is to 15 fixations of channel-section steel；Adjustable perpendicular support 11 is using top provided with adjustable diameter and screw adjusting bar 3 and top
The support of support 4, jacking 4 is used to set up flitch 6 along the longitudinal direction of pontic 17, between flitch 6 and flange plate template 10 along pontic 17 laterally
Provided with thin flitch 18, flange plate template 10 is laid on the thin inner side of flitch 18；Frame bottom welds cushion block, and cushion block is clamped on channel-section steel 15
It is interior to realize fixed supporting role；After the outer side shield of flange plate template 10 is installed, to the complete detection mark of flange plate template 10
High and line style, it is ensured that line style is attractive in appearance after the construction of the flange plate of pontic 17；
Side template 9 is installed；The lateral edge line of pontic 17 is made after in-site measurement setting-out according to design size, then installed
Side template 9；The same support for being provided with adjustable diameter and screw adjusting bar 3 and jacking 4 using top is held out against in side template 9 as adjustable diagonal bracing 12
Outside is additionally provided with the thin wood laterally set along pontic 17 along along the longitudinally disposed flitch 6 of pontic 17 between flitch 6 and side template 9
Side 18, side template 9 is laid on the thin inner side of flitch 18, and the triangle gap between thin flitch 18 and flitch 6 squeezes tight using timber wedge；Can
Oblique adjusting supports 12 bottoms and held out against in the side towards side template 9 of channel-section steel 15, and side template 9 pastes sponge with the seam areas of end template 7
Spillage when adhesive tape prevents from pouring；
The one-shot forming of chamfering 14 on the outside of e, drip 13 and the pontic edge of a wing；
It is 2 semi-circular pieces along center line subdivision, apart from flange plate end using a diameter of 30~40mm pvc pipe
At 100~150mm, the pvc pipe cut ends side after splitting is alignd with flange plate template 10, and edge of a wing template die is fixed on tingle
The upper surface of plate 10, for the one-shot forming when pouring of 17 edge of a wing bottom drip of pontic 13；
It is 4 1/4 circular arc parts along center line subdivision, by 1/4 circular arc using a diameter of 110~120mm pvc pipe
Part circular arc faces outwardly the end for being fixed on the upper surface of flange plate template 10 with tingle respectively, for chamfering 14 on the outside of the edge of a wing of pontic 17
The one-shot forming when pouring.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (1)
1. a kind of cast-in-situ box girder template construct installation method, it is characterised in that comprise the following steps：
1) cast-in-situ box girder template construct；
A, cast-in-situ box girder template include be placed in pontic bottom end template, be placed in inside pontic chamber template, be placed in pontic two
The side template in outside and the flange plate template for being placed in pontic both sides overhanging end bottom；Cast-in-situ box girder template is all using clear water mould
Plate is made, to reduce form joint, and 2440m × 1220mm maximum specification plain form is selected in the case where being dimensioned for；
B, end template, side template are plane template, and flange plate template is formed by the main body template and outside baffle combination of plane,
Design size excision forming is pressed respectively；
C, chamber template are located at the peripheral template of support frame periphery by multigroup support frame for being uniformly arranged along its longitudinal direction and enclosing
Composition；Support frame is first made, every group of support frame is made up of skeleton, perpendicular support and diagonal brace；Skeleton, perpendicular support and diagonal brace are using wood
Side makes, and its middle skeleton is by the end to end agent structure for constituting support frame of multistage flitch, and junction sets securing plate respectively
Reinforce；Several perpendicular support and the diagonal brace intersected are uniformly arranged in the agent structure of support frame；Anomaly between multigroup support frame is pressed
Row is fixed on workbench, and then the plain form being cut to size is sequentially fixed on the outside of support frame and forms periphery
Template；
2) cast-in-situ box girder model sheetinstallat；
A, install before each position template is cut after the section that exposes using water-fast phenolic aldehyde series paint brushing three times, such as find mould
Plate surface has cut or scratch, and brush phenolic paint is also mended simultaneously；
B, end template are installed；
The foundation construction of full framing is first carried out, then full framing is installed, full framing uses bowl buckle scaffold, its top
She You not adjustable diameter and screw adjusting bar and jacking；I-steel is uniformly longitudinally laid along pontic by jacking, spacing is 0.5~0.7m；
Along the laterally homogeneous laying flitch of pontic at the top of I-steel, spacing is 0.4~0.5m；End template is laid on flitch；
When laying end template, it is greater than pontic beam bottom width degree along the horizontal width of pontic, and end template both sides exceed pontic respectively
Beam bottom side 0.3~0.5m of sideline, for installing side template on end template；End template splicing seams will be in length and breadth into line, it is to avoid occur
Faulting of slab ends between fissure of displacement phenomenon, each piece of end template is highly no more than 1mm；Seam areas is leaked when pasting sponge adhesive tape to prevent pouring
Slurry；
After end template laying is finished, plane setting-out is carried out, a test point is set at interval of 5m along end template vertical, horizontal, surveyed comprehensively
End template vertical, horizontal absolute altitude is measured, end template is then adjusted to by designed elevation according to measurement result；End template Pass line adjustment is finished
Afterwards, an absolute altitude is detected again, position undesirable to absolute altitude carries out secondary adjustment, until meeting design requirement comprehensively；
After the completion of end template Pass line adjustment, load precompressed is carried out；Then bed die plate surface is arranged, checks flatness, spells
After seam smooth degree, absolute altitude all meet the requirements, comprehensive brushing releasing agent；
C, chamber model sheetinstallat；
Box beam baseplate reinforcing bar, web reinforcement and crossbeam is prestressed, reinforced install after, chamber mould is determined by surveying setting-out
Center line and edge line that plate is installed；Then chamber template is installed；Consolidated at chamber template splicing position using galvanized iron sheet
Fixed connection, it is ensured that the bulk strength of chamber template；
D, flange plate template, side template are installed；
During flange plate model sheetinstallat, adjustable perpendicular support is set in its bottom；Below pontic flange plate, I-steel at the top of full framing
On be longitudinally uniformly arranged multiple tracks channel-section steel along pontic, channel-section steel is positioned with I-steel spot welding, then the welded limiting bar pair on the outside of channel-section steel
Channel-section steel plays fixation；Adjustable perpendicular support is using support of the top provided with adjustable diameter and screw adjusting bar and jacking, and jacking is used for along pontic longitudinal direction
Flitch is set up, thin flitch is transversely provided with along pontic between flitch and flange plate template, flange plate template is laid on thin flitch；Branch
Cushion block is welded in frame bottom, and cushion block, which is clamped in channel-section steel, realizes fixed supporting role；The outer side shield of flange plate template is installed
Afterwards, to flange plate template complete detection absolute altitude and line style, it is ensured that line style is attractive in appearance after the construction of pontic flange plate；
Side template is installed；Pontic lateral edge line is made after in-site measurement setting-out according to design size, then side template is installed；
The same support for being provided with adjustable diameter and screw adjusting bar and jacking using top is held out against on the outside of side template along pontic longitudinal direction as adjustable diagonal bracing
The thin flitch laterally set along pontic is additionally provided with the flitch of setting, between flitch and side template, side template is laid on thin flitch
On, the triangle gap between thin flitch and flitch squeezes tight using timber wedge；Adjustable diagonal bracing bottom is held out against in channel-section steel towards side form
The side of plate, side template pastes spillage when sponge adhesive tape prevents from pouring with end template seam areas；
Chamfering one-shot forming on the outside of e, drip and the pontic edge of a wing；
Be 2 semi-circular pieces along center line subdivision using a diameter of 30~40mm pvc pipe, apart from flange plate end 100~
At 150mm, pvc pipe cut ends side and flange plate template alignment after splitting are fixed on flange plate template upper table with tingle
Face, for the one-shot forming when pouring of pontic edge of a wing bottom drip；
Using a diameter of 110~120mm pvc pipe, it is 4 1/4 circular arc parts along center line subdivision, 1/4 circular arc part is justified
Cambered surface is fixed on the end of flange plate template upper surface with tingle respectively outwardly, for chamfering on the outside of the pontic edge of a wing when pouring one
Secondary shaping.
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