CN109338894A - Mobile formwork pours width box girder construction method - Google Patents
Mobile formwork pours width box girder construction method Download PDFInfo
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- CN109338894A CN109338894A CN201811401701.0A CN201811401701A CN109338894A CN 109338894 A CN109338894 A CN 109338894A CN 201811401701 A CN201811401701 A CN 201811401701A CN 109338894 A CN109338894 A CN 109338894A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
The invention belongs to technical field of bridge construction, specifically a kind of mobile formwork pours width box girder construction method.The following steps are included: S100~mobile formwork repacking.S101~outrigger boom repacking, S102~outrigger boom horizontal beam fixation hole setting, S103~outrigger boom are symmetrically fixed on girder two sides, S104~add drop in beam to support, S105~drop in beam repacking, S200~narrow box girder construction of mobile formwork erection.S300~mobile formwork sets up broad box girder construction.Construction method construction of the present invention, improves utilization rate of equipment and installations.It can not needed using this construction method separately using other box girder construction methods, and then saved using material installation needed for other construction methods.
Description
Technical field
The invention belongs to technical field of bridge construction, specifically a kind of mobile formwork pours width box girder construction method.
Background technique
In recent years, with national highway, the great dynamics investment construction of railway, mobile formwork is mixed as a kind of common bridge
Solidifying in-situ depositing equipment is widely applied, however in different routes, box beam width is often different extremely, such as high-speed rail box beam is usual
For single box beam, and the slightly larger double box beams of width can be designed in certain Special zones, such as route fork location, in highway bridge
On, double box beams are more common, are not available when meeting broad box girder for the mobile formwork that normal width designs, and usually need to separately adjust equipment
Or change construction method, difficulty is caused to the allotment of the materials such as device resource, the template of enterprise, construction cost inevitably increases.
Traditional Construction Through Form on Traveler method has the disadvantages that
1. occurring not constructing when broad box girder or adjacent construction site are broad box girder on the line, utilization rate of equipment and installations is low.
2. mobile formwork volume, weight are big, transition is difficult, and the transition period is long, and transition number is directly related to construction cost,
Transition number is increased when meeting broad box girder, is increased construction cost, is also extended the construction period.
3. reducing service life of equipment to the disassembly of mobile formwork when transition, the economy and peace of mobile formwork are reduced
Quan Xing.
Therefore, studying one kind not only common narrow box beam section can construct on the line but also broad box girder construction mobile formwork can be suitble to pour
The construction method for building box beam is necessary.
Summary of the invention
The present invention to solve the above-mentioned problems, provides a kind of mobile formwork and pours width box girder construction method.
The present invention takes following technical scheme: a kind of mobile formwork pours width box girder construction method, comprising the following steps:
S100~mobile formwork repacking.
S101~outrigger boom repacking, the length that the outrigger boom of mobile formwork side need to lengthen are wide bridge pier width and narrow bridge
The half of pier width, outrigger boom horizontal beam lengthening section material use the identical material of former mobile formwork horizontal beam size,
Lengthening section is using welding, and upper surface polishes flat after welding, adds bearing diagonal under outrigger boom horizontal beam, increases bearing diagonal upper end newly
It is supported on the end of horizontal beam, bearing diagonal lower end is supported at first node of former bearing diagonal.
S102~outrigger boom horizontal beam fixation hole setting after outrigger boom lengthens, to meet increased traversing distance, is needed
Traversing jack fixation hole, the pitch-row and former mobile crossbearer horizontal beam of jack fixation hole and preceding fixation hole are added on horizontal beam
On fixation hole it is identical, the outrigger boom of mobile formwork side be both needed to carry out lengthening reform.
S103~outrigger boom is symmetrically fixed on girder two sides, construct broad box girder when, can not be traversing at the top of the drop in beam of two sides
It is fixed to girder, if stull passes through among two girders, reserves 4 sides in the web of the corresponding girder of each outrigger boom
Shape hole passes through support for drop in beam from square hole.
S104~add drop in beam to support, when constructing narrow box beam, after drop in beam molding, the drop in beam top of two sides is traversing to girder
Place, bottom closure, it is fixed after can casting concrete, concrete is vertical and lateral pressure to resist, when constructing broad box girder,
Drop in beam is added when casting concrete between the drop in beam of two sides to fix support.
S105~drop in beam is reequiped, and at the two sides end plate at the top of drop in beam, need to be drilled with 4 groups of totally 16 bolts hole, spiro keyhole position
It sets with size and screw rod is corresponding to the fixed bolt hole on the panel of support；Drop in beam bottom lengthen, drop in beam lengthening section use with
Former drop in beam material, the identical method of size, lengthening section is hinged by otic placode with existing section, is turned over up and down using the flexible realization of oil cylinder
Dynamic, drop in beam lengthening section has bed die, and when turning over, bed die is concordant with original bed die, and drop in beam lengthening section is carried out in mobile formwork side；
The vertical beam part counterweight on the outside of drop in beam, to offset the torque moved in centroid and drop in beam is caused to generate in the hanging point of outrigger boom.
S200~mobile formwork sets up narrow box girder construction.
S201~preparation of construction；Construction of cast-in-place box girders construction can be carried out after the completion of mobile formwork repacking, when constructing narrow beam, first
Drop in beam screw rod stull is bounced back, then will be turned under drop in beam bottom plate lengthening section, after adjusting mobile formwork center, then before reinforcing mobile formwork
Rear support leg.
S202~molding；Bounce back outrigger boom upper end oil cylinder, and two sides side hanging beam is slowly mobile to centre, directly molds,
Two sides side hanging beam bottom is connected again.
S203~adjustment box girder formwork.
S204~assembling reinforcement, casting concrete, maintenance, die sinking, Forward after Forward, prepare subsequent cycle construction.
S300~mobile formwork sets up broad box girder construction.
S301~and when constructing broad box girder, first drop in beam screw rod stull is bounced back, then extend drop in beam base oil cylinder, by drop in beam bottom plate
Lengthening section turns over, and after adjusting mobile formwork center, then reinforces supporting leg before and after mobile formwork.
S302~retraction outrigger boom upper end oil cylinder, two sides drop in beam is slowly mobile to centre, and drop in beam lengthens adding for side
Stop retraction outrigger boom upper end oil cylinder after long section and other side molding, two sides drop in beam bottom is connected.
After S303~drop in beam bottom connection, 4 screw rod stulls of every group of drop in beam are extended, reserve 4 sides from the web of girder
Shape hole passes through, and uses bolt with hole reserved when the repacking of drop in beam end plate to support to drop in beam end plate, and by panel hole of the screw rod to support
Connection, after support, two sides side hanging beam and screw rod stull form ring, bear various loads when broad box girder concreting.
S304~according to surveying and locating result adjusts box girder formwork height and the width, appended by two sides bottom plate and drop in beam lengthening section
Template be connected, collectively constitute broad box girder external mold.
S305~assembling reinforcement, casting concrete and maintenance.
S306~concrete is opened after reaching design strength, before die sinking, first releases drop in beam top screw rod stull bolt, then solve
Except drop in beam lower part connect, under turn over drop in beam lengthening section, be opened later；When die sinking, outrigger boom upper end oil cylinder is extended, by two sides drop in beam
It is slowly mobile to two sides, until drop in beam bottom open width, which is greater than, widens the stopping of bridge pier width, during die sinking oil cylinder fixing end according to
In the secondary bolt hole for being fixed on outrigger suspended wall horizontal beam, when moving to outrigger boom lengthening section, oil cylinder fixing end need to be fixed on newly
Increase in outrigger boom horizontal beam fixation hole.
After S307~die sinking, determine that drop in beam bottom open width greater than moving forward after widening bridge pier width, after Forward, prepares next
Circulation construction.
In the step S104, drop in beam uses screw rod to support, and every group of drop in beam uses 4 screw rods, and screw rod sets support level
It sets, screw rod is located at outrigger boom two sides side to support, and every side sets 1 up and down, and screw both end sets panel, and every piece of panel is drilled with 4
Fixed bolt hole fixes support using screw rod at the top of the drop in beam of two sides in broad box girder molding.
In the step S105, counterweight is directly welded on drop in beam vertical beam using steel plate, is computed and is obtained with balance weight
, after counterweight, drop in beam centroid need to be made to be maintained within the scope of hanging point.
Compared with prior art, beneficial effects of the present invention are as follows:
1. construction method construction of the present invention can be used, improve equipment utilization in the route that width box beam is arranged alternately
Rate.It can not needed using this construction method separately using other box girder construction methods, and then saved using other construction method institutes
The material installation needed.
2. the route of the different type box beam of region setting nearby, this engineering method can also construct, it is not required to frequently remote turn
, construction cost is reduced, the construction period is also saved.
3. mobile formwork need to only reequip once, it is not required to meet broad box girder and just dismantles, improve service life of equipment, mention
The high economy and safety of mobile formwork.
4. institute's chance method can be also expanded using method of the present invention, as mobile formwork drop in beam opens width after repacking
Transom pier in width has the operating conditions such as bent cap pier.
Detailed description of the invention
Fig. 1 is former mobile formwork figure；
Fig. 2 is mobile formwork outrigger boom repacking figure；
Fig. 3 is mobile formwork girder repacking figure；
Fig. 4 is that mobile formwork adds drop in beam to support and drop in beam repacking figure
Fig. 5 is to set up narrow box beam die sinking figure after mobile formwork is reequiped；
Fig. 6 is to set up narrow box beam molding figure after mobile formwork is reequiped；
Fig. 7 is erection broad box girder die sinking figure after mobile formwork repacking；
Fig. 8 is erection broad box girder molding figure after mobile formwork repacking；
Fig. 9 is girder web plate preformed hole position drawing；
Figure 10 is to turn over drawing under drop in beam bottom growth section；
Figure 11 is that drop in beam bottom increases section Double pin hinge fishplate bar drawing；
Figure 12 is drop in beam and screw rod stull connection schematic diagram；
1- outrigger boom in figure, 2- girder, 3- drop in beam, 4- box beam external mold, the traversing oil cylinder of 5- drop in beam, the narrow box beam of 6-, the narrow bridge pier of 7-,
8- outrigger boom lengthening section horizontal beam, 9- outrigger boom lengthening section diagonal brace, at 10- lengthening section diagonal brace support, 11- outrigger boom water
The fixation hole that flat-topped ridge is added, 12- girder web plate preformed hole, 13- stull screw rod, 14- drop in beam end face preformed hole, 15- drop in beam counterweight,
16- drop in beam bottom plate lengthening section, 17- drop in beam bottom plate lengthening section template, 18- articulated system, 19- broad box girder, 20- wide bridge pier, 21- are bis-
Axis articulated slab, 22- drop in beam end plates, 23- girder web plate, 24- screw rod stull panel.
Specific embodiment
A kind of mobile formwork pours width box girder construction method, includes the following steps.
S100~mobile formwork repacking:
S101~outrigger boom 1 is reequiped；
1 extension length of outrigger boom determines: the outrigger boom 1 of mobile formwork is fixed on girder 2, is drop in beam 3 and box beam external mold 4
There is provided support and it is traversing, drop in beam 3 mold when, on outrigger boom 1 toward center it is traversing, drop in beam 3 be opened when it is traversing toward two sides, so as to
Drop in beam bottom end and box beam external mold 4 is allowed to open one fixed width, when Forward can avoid bridge pier 7, and wide bridge corresponding to broad box girder 19
20 width of pier is also amid a sharp increase.
To adapt to the wide bridge pier 20 under broad box girder 19, outrigger boom 1 need to be lengthened, open width when to be opened meets
Wide 20 demand of bridge pier can avoid wide bridge pier 20 in Forward, therefore, what the outrigger boom 1 of mobile formwork two sides need to lengthen
Length is the half of wide 20 width of bridge pier and narrow 6 width of bridge pier.
Outrigger boom 1 lengthens: 1 horizontal beam lengthening section material of outrigger boom is identical using former mobile formwork horizontal beam size
Material, usually I-steel, 1 horizontal beam extension length of outrigger boom are above-mentioned 1.1 length determined, and lengthening section uses welding,
Upper surface polishes flat after welding, so that drop in beam can traversing sliding in passing.
Outrigger boom lengthening section diagonal brace 9,9 material of outrigger boom lengthening section diagonal brace are added under outrigger boom lengthening section horizontal beam 8
Material uses material identical with former mobile formwork bearing diagonal scantling.Newly-increased 9 upper end of outrigger boom lengthening section diagonal brace is supported on
The end of outrigger boom lengthening section horizontal beam 8,9 lower end of outrigger boom lengthening section diagonal brace are supported on first node of former bearing diagonal
At 10 at lengthening section diagonal brace support, not hinder the stull of drop in beam 3 when drop in beam 3 molds.Newly-increased outrigger boom lengthening section is oblique
Support 9 is all made of and is fully welded with outrigger boom lengthening section horizontal beam 8 and former bearing diagonal.
S102~outrigger boom horizontal beam fixation hole 11 is arranged: after outrigger boom 1 lengthens, for meet it is increased it is traversing away from
From outrigger boom horizontal beam fixation hole 11 need to be added, on horizontal beam to meet the traversing limited demand of jack stroke, outrigger
The pitch-row of boom horizontal beam fixation hole 11 and preceding fixation hole is identical as the fixation hole on former mobile crossbearer horizontal beam.Mobile formwork two
The outrigger boom 1 of side is both needed to carry out lengthening reform.
S103~girder 2 is reequiped, and outrigger boom 1 is symmetrically fixed on 2 two sides of girder, construct broad box girder 19 when, the extension of two sides
It traversing can not extremely be close to fix at girder web plate 23 at the top of beam 3, therefore stull need to be set, pass through among two girders, therefore, need
4 square holes are reserved in the web of the corresponding girder of each outrigger boom 1, in order to which 3 pairs of supports of drop in beam are passed through from square hole.
S104~add drop in beam screw rod to support 13；When constructing narrow box beam 6, after drop in beam 3 molds, 3 top of drop in beam of two sides
It is traversing at girder web plate 23, bottom closure, it is fixed after can casting concrete, concrete is vertical and lateral pressure to resist,
, can not be traversing to fixing at girder web plate 23 at the top of the drop in beam 3 of two sides and when constructing broad box girder 19, biography is not achieved with girder 2
Force request, therefore screw rod need to be added between two sides drop in beam 3 in casting concrete, support 13 is fixed.
Screw rod is used to support, for every group of drop in beam 3 using 4 screw rods to support 13, screw rod is horizontally disposed to support 13, and screw rod is to support 13
Positioned at 1 two sides of outrigger boom, every side sets 1 up and down, and 13 both ends of screw rod stull set screw rod stull panel 24, every piece of screw rod stull
Panel 24 is drilled with 4 fixed bolt holes, fixed to support 13 using screw rod at the top of two sides drop in beam 3 when broad box girder 19 of constructing molds.
S105~drop in beam 3 is reequiped；It drills at the top of drop in beam 3, at the two sides drop in beam end plates 22 at the top of drop in beam, need to be drilled with
4 groups of totally 16 bolts hole, bolt hole position and size are corresponding with the fixed bolt hole on screw rod stull panel 24.
3 stable calculation of drop in beam, because 19 width of broad box girder is increased than narrow box beam 6,3 bottom of drop in beam will accordingly be lengthened, and be added
Centroid deviates after drop in beam bottom plate lengthening section 16 and drop in beam bottom plate lengthening section template 17, therefore need to set drop in beam counterweight 15, and drop in beam bottom
After plate lengthening section 16 is superimposed with the weight of drop in beam bottom plate lengthening section template 17 with the weight of drop in beam counterweight 15, entire mobile formwork shape
The heart will lengthen side to drop in beam 3 and deviate.Therefore, it needs to calculate lengthening section weight and balance weight before 3 bottom lengthening reform of drop in beam, make
Lengthening section weight after being superimposed with balance weight the centroid of entire mobile formwork be maintained between the supporting leg of 2 girders 2 of mobile formwork.
Because mobile formwork overall weight is big, under normal circumstances, after the lengthening of side drop in beam 3 and counterweight, the centroid of mobile formwork
It is able to maintain between 22 supporting legs of girder of mobile formwork, if any pole special circumstances, is computed, the centroid of mobile formwork cannot keep
When between 2 girder supporting legs of mobile formwork, mobile formwork will have danger of toppling, at this point, need to carry out simultaneously to drop in beam 3 in two sides
Length adds and counterweight, to keep mobile formwork to stablize.
3 bottom of drop in beam lengthens；Because 19 width of broad box girder increases, therefore 3 bottom of drop in beam will accordingly lengthen, and drop in beam bottom plate lengthens
Section 16 uses method identical with former drop in beam material, size, and drop in beam bottom plate lengthening section 16 is hinged by otic placode with existing section, utilizes
The flexible realization of the oil cylinder of articulated system 18 is stirred up and down, and drop in beam bottom plate lengthening section 16 has drop in beam bottom plate lengthening section template 17,
When turning over, drop in beam bottom plate lengthening section template 17 is concordant with original bed die.Drop in beam is lengthened to carry out in mobile formwork side, to reduce
Workload is lengthened, oil cylinder configuration is reduced.
3 counterweight of drop in beam；After mobile formwork side drop in beam 3 lengthens, 3 centroid of drop in beam is changed, to mobile formwork inside
It is mobile, therefore, need on the outside of drop in beam vertical beam part counterweight, cause drop in beam 3 to produce in the hanging point of outrigger boom 1 to offset to move in centroid
Raw torque.
Drop in beam counterweight 15 is directly welded on drop in beam vertical beam using steel plate, and counterweight increases drop in beam rigidity, drop in beam again simultaneously
15 weight of counterweight is computed acquisition, after counterweight, 3 centroid of drop in beam need to be made to be maintained within the scope of hanging point.
S200~mobile formwork sets up narrow box beam 6 and constructs.
S201~preparation of construction: construction of cast-in-place box girders construction can be carried out after the completion of mobile formwork repacking, in narrow box beam 6 of constructing
When, first drop in beam screw rod stull 13 is bounced back, then will be turned under drop in beam bottom plate lengthening section 16, after adjusting mobile formwork center, then is reinforced
Supporting leg before and after mobile formwork.
S202~molding: retraction 1 upper end oil cylinder of outrigger boom, two sides drop in beam 3 is slowly mobile to centre, directly mold,
Two sides drop in beam bottom is connected again, to increase overall stability.
S203~adjustment box girder formwork adjusts box girder formwork height and the width according to surveying and locating result.
S204~assembling reinforcement, casting concrete, maintenance, die sinking, Forward.Assembling reinforcement casting concrete, is conserved, is opened
The processes such as mould, Forward are identical as mobile formwork normal construction program, and details are not described herein again.After Forward, prepare subsequent cycle construction.
S300~mobile formwork sets up broad box girder 19 and constructs.
S301~preparation of construction, after the completion of mobile formwork repacking, when constructing broad box girder 19, first by drop in beam screw rod stull 13
Retraction, then drop in beam base oil cylinder is extended, drop in beam bottom plate lengthening section 16 is turned over, drop in beam bottom plate lengthening section template 17 and original template bottom are made
Portion is equal, after adjusting mobile formwork center, then reinforces supporting leg before and after mobile formwork.
S302~molding, bounce back 1 upper end oil cylinder of outrigger boom, and two sides drop in beam 3 is slowly mobile to centre, and drop in beam 3 lengthens
Stop retraction outrigger boom upper end oil cylinder after the lengthening section of side and other side molding, 2 side hanging beam bottoms is connected, to increase entirety
Stability.,
S303~drop in beam upper end connection extends 4 screw rod stulls of every group of drop in beam, after the connection of drop in beam bottom from the web of girder
Reserved 4 square holes pass through, and to support to drop in beam end plate, and the screw rod stull panel 24 of screw rod stull 13 are reserved with drop in beam end face
Hole 14, which is connected, to be connected by screw bolts, and after support, ring is collectively formed in two sides drop in beam 13 and screw rod stull 13, bears 19 coagulation of broad box girder
Various loads when soil pours.
S304~adjustment box girder formwork 4 adjusts 4 height and the width of box girder formwork, two sides bottom plate according to surveying and locating result
It is connected with template appended by drop in beam lengthening section, collectively constitutes broad box girder external mold.
S305~assembling reinforcement, casting concrete, maintenance, the processes such as assembling reinforcement, casting concrete, maintenance and mobile mould
Frame normal construction program is identical, and details are not described herein again.
S306~die sinking, concrete can be opened after reaching design strength, and before die sinking, it is horizontal first to release 3 top screw rod of drop in beam
Support 13 screw rod stull panel 24 connect with the bolt of drop in beam end face preformed hole 14 releases again 3 lower part of drop in beam connect, under turn over drop in beam
Bottom plate lengthening section 16 can be opened later
When die sinking, 1 upper end oil cylinder of outrigger boom is extended, drop in beam 3 is slowly mobile to two sides, until 3 bottom open width of drop in beam
It can stop greater than 20 width of bridge pier is widened, oil cylinder fixing end is in turn secured to the bolt of outrigger suspended wall horizontal beam during die sinking
Kong Zhong, when moving to outrigger boom lengthening section, oil cylinder fixing end need to be fixed in newly-increased outrigger boom horizontal beam fixation hole 11.
After S307~die sinking, determining can move forward after 3 bottom open width of drop in beam is greater than wide 19 width of bridge pier, and move forward process
Identical as mobile formwork normal construction program, details are not described herein again.After Forward, prepare subsequent cycle construction.
As mobile formwork normal construction program, the equal two sides of drop in beam of the present invention are symmetrical, and a secondary mobile formwork is set
It is equipped with several groups (general 8~10 groups).
The repacking is directed to all drop in beams 3, not just for 1 group of drop in beam.
Claims (3)
1. a kind of mobile formwork pours width box girder construction method, it is characterised in that: include the following steps,
S100~mobile formwork repacking；
S101~outrigger boom repacking, the length that the outrigger boom of mobile formwork (2) side need to lengthen are wide bridge pier width and narrow bridge
The half of pier width, outrigger boom horizontal beam lengthening section material use the identical material of former mobile formwork horizontal beam size,
Lengthening section is using welding, and upper surface polishes flat after welding, adds bearing diagonal under outrigger boom horizontal beam, increases bearing diagonal upper end newly
It is supported on the end of horizontal beam, bearing diagonal lower end is supported at first node of former bearing diagonal；
S102~outrigger boom horizontal beam fixation hole setting, need to be in water to meet increased traversing distance after outrigger boom lengthens
Traversing jack fixation hole is added on flat-topped ridge, the pitch-row and original of jack fixation hole and preceding fixation hole move on crossbearer horizontal beam
Fixation hole is identical, and the outrigger boom of mobile formwork (2) side is both needed to carry out lengthening reform；
S103~outrigger boom is symmetrically fixed on girder two sides, construct broad box girder when, can not be traversing to main at the top of the drop in beam of two sides
Liang Chu is fixed, rectangular at the web of the corresponding girder of each outrigger boom reserved 4 if stull passes through among two girders
Hole passes through support for drop in beam from square hole；
S104~add drop in beam is to support, traversing at girder at the top of the drop in beam of two sides after drop in beam molding when constructing narrow box beam,
Bottom closure, it is fixed after can casting concrete, to resist, concrete is vertical and lateral pressure is being poured when constructing broad box girder
Drop in beam is added when building concrete between the drop in beam of two sides to fix support；
S105~drop in beam repacking at the two sides end plate at the top of drop in beam, need to be drilled with 4 groups of totally 16 bolts hole, bolt hole position with
Size is corresponding to the fixed bolt hole on the panel of support with screw rod；Drop in beam bottom lengthens, and drop in beam lengthening section is used to be hung with original
The identical method of beam material, size, lengthening section is hinged by otic placode with existing section, is stirred up and down using the flexible realization of oil cylinder,
Drop in beam lengthening section has bed die, and when turning over, bed die is concordant with original bed die, and drop in beam lengthening section is carried out in mobile formwork side；?
Vertical beam part counterweight on the outside of drop in beam, to offset the torque moved in centroid and drop in beam is caused to generate in the hanging point of outrigger boom；
S200~mobile formwork sets up narrow box girder construction；
S201~preparation of construction；Construction of cast-in-place box girders construction can be carried out after the completion of mobile formwork repacking, when constructing narrow beam, will first be hung
Beam screw rod stull retraction, then will be turned under drop in beam bottom plate lengthening section, after adjusting mobile formwork center, then reinforce branch before and after mobile formwork
Leg；
S202~molding；Bounce back outrigger boom upper end oil cylinder, and two sides side hanging beam is slowly mobile to centre, directly molds, then will
Two sides side hanging beam bottom is connected；
S203~adjustment box girder formwork；
S204~assembling reinforcement, casting concrete, maintenance, die sinking, Forward after Forward, prepare subsequent cycle construction；
S300~mobile formwork sets up broad box girder construction；
S301~and when constructing broad box girder, first drop in beam screw rod stull is bounced back, then extend drop in beam base oil cylinder, drop in beam bottom plate is lengthened
Section turns over, and after adjusting mobile formwork center, then reinforces supporting leg before and after mobile formwork；
S302~retraction outrigger boom upper end oil cylinder, two sides drop in beam is slowly mobile to centre, and drop in beam lengthens the lengthening section of side
Stop the outrigger boom upper end oil cylinder that bounces back with after the molding of the other side, two sides drop in beam bottom is connected；
After S303~drop in beam bottom connection, 4 screw rod stulls of every group of drop in beam are extended, reserve 4 square holes from the web of girder
It passes through, is connected by screw bolts to support to drop in beam end plate, and by panel hole of the screw rod to support with hole reserved when the repacking of drop in beam end plate,
After support, two sides side hanging beam and screw rod stull form ring, bear various loads when broad box girder concreting；
S304~according to surveying and locating result adjustment box girder formwork height and the width, two sides bottom plate and mould appended by drop in beam lengthening section
Plate is connected, and collectively constitutes broad box girder external mold；
S305~assembling reinforcement, casting concrete and maintenance；
S306~concrete is opened after reaching design strength, before die sinking, first releases drop in beam top screw rod stull bolt, then release extension
Beam lower part connection, under turn over drop in beam lengthening section, be opened later；When die sinking, outrigger boom upper end oil cylinder is extended, two sides drop in beam is slow
Mobile to two sides, until drop in beam bottom open width, which is greater than, widens the stopping of bridge pier width, oil cylinder fixing end is successively solid during die sinking
Due in the bolt hole of outrigger suspended wall horizontal beam, when moving to outrigger boom lengthening section, oil cylinder fixing end need to be fixed on newly-increased choose
In beam boom horizontal beam fixation hole；
After S307~die sinking, determine that drop in beam bottom open width greater than moving forward after widening bridge pier width, after Forward, prepares subsequent cycle
Construction.
2. mobile formwork according to claim 1 pours width box girder construction method, it is characterised in that: the step
In S104, drop in beam uses screw rod to support, and every group of drop in beam uses 4 screw rods, and screw rod is horizontally disposed to support, and screw rod is located at outrigger to support
Boom two sides side, every side set 1 up and down, and screw both end sets panel, and every piece of panel is drilled with 4 fixed bolt holes, in broad box girder
When molding, support is fixed using screw rod at the top of the drop in beam of two sides.
3. mobile formwork according to claim 1 pours width box girder construction method, it is characterised in that: the step
In S105, counterweight is directly welded on drop in beam vertical beam using steel plate, is computed acquisition with balance weight, after counterweight, need to be made drop in beam
Centroid is maintained within the scope of hanging point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401701.0A CN109338894B (en) | 2018-11-22 | 2018-11-22 | Construction method for pouring wide and narrow box girder by movable formwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401701.0A CN109338894B (en) | 2018-11-22 | 2018-11-22 | Construction method for pouring wide and narrow box girder by movable formwork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109338894A true CN109338894A (en) | 2019-02-15 |
| CN109338894B CN109338894B (en) | 2020-05-12 |
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| CN201811401701.0A Active CN109338894B (en) | 2018-11-22 | 2018-11-22 | Construction method for pouring wide and narrow box girder by movable formwork |
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| CN110593120A (en) * | 2019-09-30 | 2019-12-20 | 中国十七冶集团有限公司 | Movable counterweight device for bridge closure and use method |
| CN112482226A (en) * | 2020-11-19 | 2021-03-12 | 中铁大桥局集团有限公司 | Overhead variable-span length construction method for upstroke movable formwork |
| CN113047152A (en) * | 2021-05-18 | 2021-06-29 | 中铁四局集团有限公司 | Descending type double-span movable formwork and construction method |
| CN114525737A (en) * | 2022-03-03 | 2022-05-24 | 河南大学 | Bridge deck type movable formwork via hole braking system and braking method |
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| CN110593120A (en) * | 2019-09-30 | 2019-12-20 | 中国十七冶集团有限公司 | Movable counterweight device for bridge closure and use method |
| CN112482226A (en) * | 2020-11-19 | 2021-03-12 | 中铁大桥局集团有限公司 | Overhead variable-span length construction method for upstroke movable formwork |
| CN113047152A (en) * | 2021-05-18 | 2021-06-29 | 中铁四局集团有限公司 | Descending type double-span movable formwork and construction method |
| CN113047152B (en) * | 2021-05-18 | 2022-10-11 | 中铁四局集团有限公司 | Descending type double-span movable formwork and construction method |
| CN114525737A (en) * | 2022-03-03 | 2022-05-24 | 河南大学 | Bridge deck type movable formwork via hole braking system and braking method |
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| CN109338894B (en) | 2020-05-12 |
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