CN106436578A - Constructing method and constructing device for cantilever sectional beam with specially-shaped cross section through short-line matching method - Google Patents
Constructing method and constructing device for cantilever sectional beam with specially-shaped cross section through short-line matching method Download PDFInfo
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- CN106436578A CN106436578A CN201610729412.8A CN201610729412A CN106436578A CN 106436578 A CN106436578 A CN 106436578A CN 201610729412 A CN201610729412 A CN 201610729412A CN 106436578 A CN106436578 A CN 106436578A
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- 239000004567 concrete Substances 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract 3
- 238000010276 construction Methods 0.000 claims description 56
- 230000008878 coupling Effects 0.000 claims description 49
- 238000010168 coupling process Methods 0.000 claims description 49
- 238000005859 coupling reaction Methods 0.000 claims description 49
- 238000005259 measurement Methods 0.000 claims description 20
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- 238000012423 maintenance Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 239000011513 prestressed concrete Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 244000062793 Sorghum vulgare Species 0.000 description 5
- 235000019713 millet Nutrition 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
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- 235000009566 rice Nutrition 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
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Classifications
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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
Abstract
The invention provides a constructing method and constructing device for a cantilever sectional beam with a specially-shaped cross section through a short-line matching method. The constructing method comprises the following steps of positioning a fixed end mould on one side of a beam section to be cast; performing matching surface positioning on an end mould on the other side of the beam section to be cast through a matching surface of a matching beam section; mounting a bottom mould of the beam section to be cast and a dolly, and adjusting the three-dimensional position of the bottom mould and the three-dimensional position of the matching beam section; mounting a side mould of the beam section to be cast; mounting an inner mould of the beam section to be cast; banding a reinforcing rib framework and hoisting the banded reinforcing rib framework to a mould of the beam section to be cast; performing concrete casting; performing concrete curing; and disassembling the moulds, and performing demoulding. The constructing method disclosed by the invention has the advantages that the splicing accuracy of a matching seam of every two adjacent beam sections is guaranteed; after a new casting beam section is preliminary cured and demoulded, the matching beam section is transported and stored, and the new casting beam section is transported to the position as a new matching beam section for completing the prefabricating the next beam section, so that through the circulation, the prefabricating of a whole-span beam section is completed.
Description
Technical field
The present invention relates to a kind of urban rail transit elevated circuit beam structure And of Varying Depth odd-shaped cross section " U-shaped+box "
The prefabricated construction technology of compound section beam sections.
Background technology
The bridge of First Precast Concrete Segmental Bridges construction is to build up on the Seine of Paris, FRA in 1962 in the world
Shoisy-Le-Roi bridge.The French Oleron strait Bridge built up for 1966 employs upstriker first and moves assembling support work
Method is constructed.1978, the U.S.'s Long Key bridge being designed by Jean Muller, it is one and adopt external prestressing structure first
Precast Concrete Segmental Bridges construction bridge, be also a new generation externally pre-stressed concrete bridge.2000, Bangkok, THA Man Na
Highway overpass total length 55km, using prefabricated subsection method assembling construction, only 26 months duration.March calendar year 2001, the clear river in Shanghai
Bridge adopts short-line prefabrication section assembling construction technology, is the first bridge block that China uses the construction of section assembling technology.
The Su-Tong Brideg building up for 2008 adopts box girder segment assembling construction technology, across footpath 1088m, is the maximum sections of whole world across footpath
Assembled cable-stayed bridge.
Assembly beam sections according to the present invention, are two-wire Prestressed Continuous compound cross-section beams, its topmost technological difficulties
It is the coupling of each beam section, because beam sections adopt U beam and box beam compound cross-section, and beam bottom radian is that parabolical 1.8 powers become
Change, prestressing tendon in entirety, because each segmental height, length dimension are different, therefore how to combine and precise control is this skill
The key point of art.
Content of the invention
The purpose of the present invention aims to provide a kind of odd-shaped cross section cantilever beam sections slug matching construction method and device, with
Overcome the existing defects of above-mentioned prior art.
The present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, comprises the following steps,
Step A, the side fixing end mould positioning of beam section to be poured；
Step B, the end mould of the opposite side of beam section to be poured, using the coupling face of coupling beam section, mate face positioning；
Step C, the bed die installing beam section to be poured and chassis, and adjust bed die and the three-dimensional position mating beam section；
Step D, the side form of beam section to be poured is installed；
Step E, the internal model of beam section to be poured is installed；
Step F, tie with reinforcing bar simultaneously lift the mould into beam section to be poured；
Step G, casting concrete；
Step H, concrete curing；
Step I, form removal, the demoulding.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Wherein in step A, fixing end mould positioning has steps of,
Step A-1, middle line traffic control：Respectively set an axial line control point in the top surface of fixing end mould and bottom surface, during measurement it is desirable to
Measurement baseline between this two control point and two measurement towers overlaps.
Step A-2, degree control：Measure upper and lower two center line control point to the horizontal range measuring basic point, and adjust
Make it apart from equal it is ensured that vertical axis is vertical；Measurement is symmetricly set on absolute altitude and the plane of fixing end mould flange plate both sides
Position control point is to measuring the distance of basic point and adjust and make it equal it is ensured that fixing end mould is in 90 ° with beam section axis to be poured；
Step A-3, levelness control：Measurement is symmetricly set on two absolute altitudes and the plane position of fixing end mould flange plate both sides
Put the relative elevation at control point, control fixing end mould top surface levelness.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Wherein in step B, coupling face positioning has steps of,
Step B-1, the data according to beam section to be poured measurement and beam section to be poured with mate beam section mutual alignment relation,
Calculate when pouring beam precast, the position that coupling beam section should be located；
Step B-2, determination coupling beam section mate the positional distance of face and fixing end mould；
Step B-3, according to positional distance, Primary Location is carried out to coupling beam section.
Step B-4, operate the hydraulic jack on the bottom die trolley of beam section to be poured carry out vertical, horizontal and horizontal absolute altitude essence
Determine position.
Screw off four spiral spikes on bed die after step B-5, coupling beam section positioning, and make its stress, drop bed die platform
Car jack, completes the conversion of fulcrum force.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Wherein step B also includes, step B-6, repetition measurement coupling beam section control point coordinate, and it is pre- whether detection positioning reaches
Provisioning request；Detection is unqualified, re-starts positioning, return to step B-1.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Wherein step H includes, quiet stop, heat up, constant temperature, cooling four-stage carry out；At 6～10 hours between the quiet stopping time；
Temperature rise period, heat up per hour and cannot be greater than 15 DEG C, until rising to 55 DEG C, terminating the temperature rise period, entering the thermostatic control stage；
Constant temperature period curing temperature is maintained at 55 ± 5 DEG C；Temperature-fall period：When concrete strength reaches 70%, beam body maintenance can be entered
Temperature-fall period, cooling rate cannot be greater than 15 DEG C/h.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Form removal and the demoulding are carried out when the difference of beam body surface temperature and ambient temperature is not more than 15 DEG C.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching construction method, can also have
Such feature：Prefabricated bridge belongs to the U-shaped beam bridge of two-wire prestressed concrete continuous beam, and beam bottom is pressed 1.8 power parabolas and become
Change, prestressing tendon in entirety, the section of beam sections is special-shaped compound cross-section.
In addition, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching constructing device：Including least one set
Pour set of molds；Every group pours set of molds and has：Fixing end mould, the first bed die, the first chassis, the second bed die, the second chassis, side
Mould and internal model；The support anchor support that fixing end mould is fixed on ground connects；Two bed dies are separately positioned on two chassis
Coupling beam section is had on one bed die；Second bed die and the second chassis are arranged between fixing end mould and coupling beam section；Side form is installed
Both sides in fixing end mould and coupling two ends；Internal model is inserted in the mould that fixing end mould, coupling face and side form are formed.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching constructing device, can also have
Such feature：Also include crampon, lifting bracket, carrier bar and driving；Lifting bracket moves on the track on ground；Hold
Carrier beam is fixed on lifting bracket；Driving is moved on carrier bar, and crampon is fixed in driving；Crampon is by the second bottom
Mould and the second chassis hang between the first bed die, fixing end mould.
Further, the present invention provides a kind of odd-shaped cross section cantilever beam sections slug matching constructing device, can also have
Such feature：Chassis is provided with hydraulic jack, can be used for adjusting and mate the three-dimensional position of beam section；Pluggable slotting under bed die
Enter formula vibrator vibrate based on when pouring as a plug vibrator vibrate.
A kind of odd-shaped cross section cantilever beam sections slug matching construction method and device that the present invention provides, are particularly well-suited to
Across based on 50-55m, part of nodes main span reaches 70m to bridge main.For the node bridge for 50-70m for the main span, using sections
Assembling technique is constructed.The continuous beam section of section assembling adopts U-shaped and welded box cross column, mainly by box beam top board (i.e. sections U beam
Base plate), box beam base plate, box girder web, sections U back plate, sections U web and median ventral plate composition.Main spanning divide 70m,
Tri- kinds of specifications of 55m, 50m, 11.44 meters of deck-siding, deck-molding 2.05-4.2 rice, 2.0～3.5 meters of sections partition length.
A kind of odd-shaped cross section cantilever beam sections slug matching construction method and device that the present invention provides, overall plan is
Multiple pedestals, the operation simultaneously of each pedestal are set in precasting yard, all beam section are all poured on precast pedestal.When pouring, often
Initiate beam section across beam precast and adopt one end fixing end mould, it is outer that one end movable end mould is poured, remaining beam section is then using one end
For fixing end mould, the other end is that the previous beam section poured is done coupling beam section and poured into a mould it is ensured that adjacent beam section coupling seam
Splicing precision, after newly pouring the preliminary health preserving of beam section, form removal, coupling beam section is transported and is deposited, and is newly poured beam section and transfer to this position
Put conduct and newly mate beam section, complete the prefabricated of next beam section, and circulation completes the prefabricated of whole bridge section according to this.Sections beam model
Using threedimensional model design, model decomposition is superstructure and substructure two parts, reaches superstructure and share, lower junction
Structure list does；Model is adjusted using coordinate control mode it is ensured that precision.Complete the operation of a circulation.
Brief description
Fig. 1 is the structure chart of urban rail transit elevated circuit continuous beam.
Fig. 2 is the beam sections sectional drawing of urban rail transit elevated circuit continuous beam.
Fig. 3 is the structure chart of odd-shaped cross section cantilever beam sections slug matching constructing device.
Fig. 4 is the procedure chart that chassis adjusts bed die height.
Fig. 5 is step A to C construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Fig. 6 is step D construction schematic diagram in odd-shaped cross section cantilever beam sections slug matching construction method.
Fig. 7 is step E to F construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Fig. 8 is to complete step F construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Fig. 9 is step G construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Figure 10 is step H construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Figure 11 is step I form removal construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Figure 12 is step I demoulding construction drawing in odd-shaped cross section cantilever beam sections slug matching construction method.
Specific embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, in the present embodiment, taking urban rail transit elevated circuit beam structure as a example.As shown in Fig. 2
The beam sections truncation surface of continuous beam is odd-shaped cross section.Beam sections truncation surface top has the new cross-sectional configuration of U 1, bottom single box double room
Box-type section construction 2.The new cross-sectional configuration of U 1 side setting shear connector, single box double room box-type section construction 2 bottom have pre-
Stress steel Shu Zhangla hole 4.Across based on 50-55m, part of nodes main span reaches 70m to bridge main.For the section for 50-70m for the main span
Point bridge, using the construction of section assembling technology.The continuous beam section of section assembling adopts U-shaped and welded box cross column, mainly by case
Back plate (i.e. sections U beam base plate), box beam base plate, box girder web, sections U back plate, sections U web and median ventral plate composition.
Main spanning divides 70m, 55m, 50m tri- kinds of specifications, 11.44 meters of deck-siding, deck-molding 2.05-4.2 rice, sections partition length 2.0～3.5
Rice.
As shown in figure 3, odd-shaped cross section cantilever beam sections slug matching constructing device, including：Two groups pour set of molds
100th, crampon 200, lifting bracket 300, carrier bar 400 and driving 500.
Lifting bracket 300 can move on the track on ground.Carrier bar 400 is fixed on lifting bracket 300.Driving
500 move on carrier bar 400, and crampon 200 is fixed in driving 500.
Every group pours set of molds 100 and has：Fixing end mould 10, the first bed die 21, the first chassis 31, the second bed die 22,
Two chassis 32, side form 40 and internal model 50.Fixing end mould 10 makees panel by δ 10mm steel plate, with the support being fixed on ground after putting more energy into
Anchor support connects.Two bed dies are separately positioned on two chassis.Coupling beam section X is had on the first bed die 21, mates beam section X
Coupling face as opposite side end mould.Coupling beam section X is placed on the three-dimensional position of setting.Second bed die 22 and the second chassis 32
It is arranged between fixing end mould 10 and coupling beam section X.Side form 40 is arranged on fixing end mould 10 and the both sides at coupling two ends.Internal model 50
In the mould that insertion fixing end mould 10, coupling face and side form 40 are formed.
As shown in figure 4, chassis 30 is provided with perpendicular, horizontal each 4 hydraulic jack, can be used for the three of bed die and coupling beam section
Dimension position adjustment.When pouring, under bed die insertion poker vibrator vibrate based on when pouring as a plug vibrator vibrate.
Crampon 200 hangs in the second bed die 22 and the second chassis 32 between first bed die 21, fixing end mould 10.Lifting
Suspension hook 200 can take into account multiple movements pouring bed die and chassis in set of molds 100.Arrange two groups in this enforcement and pour set of molds
100, can be arranged according to live place and greater number of pour set of molds 100.Pouring set of molds 100 can longitudinally, laterally square
Battle array arrangement.Lifting bracket 300 drives crampon 200 to move forward and backward, and chassis drives crampon 200 to move left and right.Hoisting hook
Hook 200 can be also used for framework of steel reinforcement, and the transport pouring the beam section completing.
After completing to pour, first bed die the second bed die, the first chassis can be exchanged with the second chassis.
Odd-shaped cross section cantilever beam sections slug matching construction method comprises the following steps：
Step A, the fixing end mould 10 of beam section Y side to be poured positions.
End mould includes fixing end mould and the coupling face of coupling beam section.Fixing end mould makees panel by δ 10mm steel plate, after putting more energy into
The support anchor support being fixed on ground connects.Fixing end mould is provided with shear connector, because prefabricated beam section present position is different, cuts
Power bond number amount also occurs difference.Therefore it is designed as bolt to the Partial Shear key needing to change to fix, easy to disassemble.Its remaining part
Point then using being welded and fixed.In whole template system, the required precision highest of fixing end mould, control in the following manner：
1) line traffic control in：On fixing end mould, the bottom surface of top surface and inner chamber respectively sets an axial line control point, during measurement,
The measurement baseline between this two control point and two measurement towers is asked to overlap.
2) degree control：Measure upper and lower two center line control point to the level measuring basic point (measuring instrument erection point)
Distance, and adjust and make it apart from equal it is ensured that vertical axis is vertical (horizontal range is equal).Measurement is symmetricly set on fixing end
The absolute altitude of mould flange plate both sides and plan-position control point to the distance measuring basic point and adjust and make it equal it is ensured that fixing end mould
(horizontal range is equal) in 90 ° with beam section axis to be poured.
3) levelness controls：Measurement is symmetricly set on two absolute altitudes of fixing end mould flange plate both sides and plan-position controls
The relative elevation of point, controls fixing end mould top surface levelness.
Step B, the end mould of current beam section Y opposite side is using the coupling face mating beam section；The coupling face positioning of coupling beam section.
Coupling beam section i.e. beam section X of previous preparation.
Coupling beam section positioning is the important ring in the construction of short-term matching beam, takes following steps：
1) survey crew measures according to beam section Y to be poured data and beam section Y to be poured with mate beam section mutual alignment
Relation, calculates when pouring beam section Y and be prefabricated by specialized procedure, the position that coupling beam section X should be located.
2) survey crew provides the positional distance that coupling beam section mates face X and fixing end mould 10.
3) the positional distance data that site operation technical staff provides according to survey crew, carries out preliminary to coupling beam section X
Positioning.
4) survey crew observation coupling beam section, commanding operates the hydraulic jack on bottom die trolley to carry out vertical, horizontal
And horizontal absolute altitude is accurately positioned.
5) screw off four spiral spikes on bed die after coupling beam section X positioning, and make its stress, drop bottom die trolley very heavy
Top, completes the conversion of fulcrum force.
6) to monitoring programme, precision reaches requirement and passes through error repetition measurement coupling beam section X control point coordinates, and input data
Check and then close up side form, such as do not reach requirement, then jack is reorientated.
Step C, installs bed die 20 and the chassis 30 of beam section Y to be poured, and bed die panel adopts δ 10mm steel plate, vertical, horizontal
If ribbed stiffener.Each precast pedestal is equipped with two sets of bed dies (being respectively used to mate beam section and beam section to be poured), mutually exchanges between them
Position, adopts bottom die trolley, adopts crampon during shift-in during removal.Bottom die trolley is provided with perpendicular, horizontal each 4 hydraulic jacks
Top, can be used for the three-dimensional position adjustment of bed die and coupling beam section.
Step D, installs beam section Y side form 40 to be poured.
Side form adopts the thick quality steel plate of δ 8mm, joins vertical, horizontal rib, is supported by steel structure support, support sets
Adjustable diameter and screw adjusting system, can horizontally and vertically be adjusted.Side form moved by the spiral regulating device that support supports and
Positioning, after the completion of positioning, top opening and bottom by pull bar to drawing.Side form stent bolt is connected on the built-in fitting on pedestal basis.
Step E, installs the internal model 50 of beam section Y to be poured.
Internal model is made up of δ 8mm steel plate, if ribbed stiffener.In order to adapt to the change of chamber size and convenient assembly and disassembly behaviour in each beam section
Make, internal model is designed to the gang form of fritter, gang form is divided into calibrated bolck and special-shaped block, needs to carry out according to each beam precast
Combination.Internal model is mainly made up of side form in top board bed die, web and angle mould, with bolts between each template, by adjustable support
Bar supports.Whole inner formwork system is fixed on crossbeam, can complete vertical direction by hydraulic system and stretch and horizontal unlatching, closure,
And integrally hung away by straddle truck.
Step F, tie with reinforcing bar simultaneously lifts into pouring mould, and for preventing from deforming, framework of steel reinforcement adopts special hanger many
Point balancing lifting, before handling, adjusting each suspension centre lifting rope makes its uniform force.For ensureing the accurate of corrugated tube position and docking port,
The boring of corrugated tube design attitude is pressed on fixing end mould, the method being bolted duroplasts plug carrys out precise control corrugated pipe orifice
Position.At coupling face, to coupling beam section corresponding corrugated tube PP-R internal lining pipe, beam section to be poured guarantees that its connection is straight.
Step G, casting concrete, to carry out second pouring beam base plate using tumbling barrel from the direct cloth of top board square hole hollowing out
Material cast.To there is the beam section of standard inner formwork system then using hanging tumbling barrel in fixing end mould top surface and be delivered to base plate through chute
On poured.Based on during bottom slab concreting, vibrator vibrates as a plug, in the reinforcing bar compact district of base plate and web junction,
Base plate two ends respectively install 4 attached vibrator auxiliary additional and vibrate.Web adopts the symmetrical blanking in both sides, and vibrate vibrator as a plug
Based on vibrating, can vibrate by form vibrator auxiliary in web bottom.For the beam section having base plate anchor block, need to especially note
Meaning base plate anchor block inner concrete vibrate it is ensured that this position concrete compaction.
Step H, concrete curing, steam curing must strictly divide quiet stop, heat up, constant temperature, the four-stage such as cooling are carried out.
Different according to temperature, (start timing after beam body concrete all irrigates completion) between the quiet stopping time different, about little 6～10
When；Temperature rise period, heat up per hour and cannot be greater than 15 DEG C, until rising to 55 DEG C, terminating the temperature rise period, entering thermostatic control rank
Section；Constant temperature period curing temperature is maintained at 55 ± 5 DEG C, continues curing time depending on concrete strength development and schedule requirement；
Temperature-fall period：The temperature-fall period of beam body maintenance when concrete strength reaches 70%, can be entered, cooling rate cannot be greater than 15 DEG C/
h.
Step I, form removal, the demoulding.
1) form removal：
Remove the side form 40 outside fine strain of millet section Y, beam section X and fine strain of millet section Y will be mated and separate, and remove internal model 50.
During form removal, beam body surface temperature and natural environment temperature-difference are not more than 15 DEG C, and beam body band mould time delay otherwise should be allowed to drop
Temperature.
2) demoulding：
By beam section Y and fixing end moulding/demoulding, when the difference of beam body surface temperature and ambient temperature is not more than 15 DEG C, just allow de-
Mould.Fine strain of millet section X is transported through, deposits.
The end mould of the fine strain of millet section that beam section Y pours as the next one, repeat step A to step J circulates preparation fine strain of millet section.
The invention discloses a kind of odd-shaped cross section cantilever beam sections slug matching construction method and device, it is particularly well-suited to
The transverse section of beam sections is compound cross-section, is combined by the U-shaped section in top+bottom single box double room box-type section, due to box
Section-bottom presses second-degree parabola change along span direction, therefore for a variable cross-section abnormity combination beam.The applying of bed rearrangement bridge
Work method is that a Continuous Bridge is divided into several sections, using in factory's concentration pre-casting, transports to scene through shear connector
It is spliced to form beam structure with tensioning steel bundle, bridge is urban track traffic two-wire continuous U beam.Beam sections prefabrication
Method adopts short-term pedestal matching method prefabricated construction technology, and the way of short-term pedestal matching method is that the perfusion of each beam sections all exists
Carry out in same certain moduli plate, its one end is the end mould of a fixation, the other end is to pour beam section, and the position of beam to be irrigated is not
Become, obtain a kind of construction method of flat, the vertical curve set arbitrarily, this construction by the geometric position that adjustment has irrigated matching beam
Method has that floor space is little, short construction period；Beam body prefabricated and bridge substructure construction can parallel operations, greatly shorten
The bridge construction duration；Beam sections concrete shrinkage and creep is little, and after completion, the linear change of beam body is little；The segment girder precast life of batch production
Produce, be easy to organization of production and the control of integral construction quality；Beam sections concentration pre-casting produces, beneficial to protection periphery ecological environment,
Make the harmful effect that engineering is brought reach minimum degree, and while reducing difficulty of construction, ensure that the height of construction
Safety.
Claims (10)
1. a kind of odd-shaped cross section cantilever beam sections slug matching construction method it is characterised in that：Comprise the following steps,
Step A, the side fixing end mould positioning of beam section to be poured；
Step B, the end mould of the opposite side of beam section to be poured, using the coupling face of coupling beam section, mate face positioning；
Step C, the bed die installing beam section to be poured and chassis, and adjust bed die and the three-dimensional position mating beam section；
Step D, the side form of beam section to be poured is installed；
Step E, the internal model of beam section to be poured is installed；
Step F, tie with reinforcing bar simultaneously lift the mould into beam section to be poured；
Step G, casting concrete；
Step H, concrete curing；
Step I, form removal, the demoulding.
2. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 1 it is characterised in that：Wherein
In step A, fixing end mould positioning has steps of,
Step A-1, middle line traffic control：Respectively set an axial line control point in the top surface of fixing end mould and bottom surface, during measurement it is desirable to this two
Measurement baseline between individual control point and two measurement towers overlaps.
Step A-2, degree control：Measure upper and lower two center line control point to the horizontal range measuring basic point, and adjust and make it
Apart from equal it is ensured that vertical axis is vertical；Measurement is symmetricly set on absolute altitude and the plan-position of fixing end mould flange plate both sides
Control point is to measuring the distance of basic point and adjust and make it equal it is ensured that fixing end mould is in 90 ° with beam section axis to be poured；
Step A-3, levelness control：Measurement is symmetricly set on two absolute altitudes and the plan-position control of fixing end mould flange plate both sides
The relative elevation of system point, controls fixing end mould top surface levelness.
3. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 1 it is characterised in that：Wherein
In step B, coupling face positioning has steps of,
Step B-1, the data according to beam section to be poured measurement and beam section to be poured with mate beam section mutual alignment relation, calculating
Go out when pouring beam precast, the position that coupling beam section should be located；
Step B-2, determination coupling beam section mate the positional distance of face and fixing end mould；
Step B-3, according to positional distance, Primary Location is carried out to coupling beam section.
Step B-4, to operate the hydraulic jack on the bottom die trolley of beam section to be poured to carry out vertical, horizontal and horizontal absolute altitude accurately fixed
Position.
Screw off four spiral spikes on bed die after step B-5, coupling beam section positioning, and make its stress, drop bottom die trolley thousand
Jin top, completes the conversion of fulcrum force.
4. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 3 it is characterised in that：Wherein
Step B also includes,
Step B-6, repetition measurement coupling beam section control point coordinate, whether detection positioning reaches pre-provisioning request；Detection is unqualified, again enters
Row positioning, return to step B-1.
5. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 1 it is characterised in that：Wherein
Step H includes, quiet stop, heat up, constant temperature, cooling four-stage carry out；At 6～10 hours between the quiet stopping time；Temperature rise period, per hour
Intensification cannot be greater than 15 DEG C, until rising to 55 DEG C, terminating the temperature rise period, entering the thermostatic control stage；Constant temperature period maintenance temperature
Degree is maintained at 55 ± 5 DEG C；Temperature-fall period：The temperature-fall period of beam body maintenance, cooling speed when concrete strength reaches 70%, can be entered
Degree cannot be greater than 15 DEG C/h.
6. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 1 it is characterised in that：Form removal
Carry out when the difference of beam body surface temperature and ambient temperature is not more than 15 DEG C with the demoulding.
7. odd-shaped cross section cantilever beam sections slug matching construction method according to claim 1 it is characterised in that：Prefabricated
Bridge belong to the U-shaped beam bridge of two-wire prestressed concrete continuous beam, beam bottom press 1.8 power parabolas change, full prestressing with bond
Bundle, the section of beam sections is special-shaped compound cross-section.
8. a kind of odd-shaped cross section cantilever beam sections slug matching constructing device it is characterised in that：Including least one set pours mould
Tool group；
Every group pours set of molds and has：Fixing end mould, the first bed die, the first chassis, the second bed die, the second chassis, side form and interior
Mould；
The support anchor support that fixing end mould is fixed on ground connects；Two bed dies are separately positioned on the first bed die on two chassis
On there is coupling beam section；Second bed die and the second chassis are arranged between fixing end mould and coupling beam section；Side form is arranged on fixation
End mould and the both sides at coupling two ends；Internal model is inserted in the mould that fixing end mould, coupling face and side form are formed.
9. odd-shaped cross section cantilever beam sections slug matching constructing device according to claim 8 it is characterised in that:Also wrap
Include crampon, lifting bracket, carrier bar and driving；
Lifting bracket moves on the track on ground；Carrier bar is fixed on lifting bracket；Driving is moved on carrier bar, lifting
Suspension hook is fixed in driving；
Crampon hangs in the second bed die and the second chassis between the first bed die, fixing end mould.
10. odd-shaped cross section cantilever beam sections slug matching constructing device according to claim 8 it is characterised in that:
Chassis is provided with hydraulic jack, can be used for adjusting and mate the three-dimensional position of beam section；
Under bed die pluggable poker vibrator vibrate based on when pouring as a plug vibrator vibrate.
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|---|---|---|---|
| CN201610729412.8A CN106436578A (en) | 2016-08-25 | 2016-08-25 | Constructing method and constructing device for cantilever sectional beam with specially-shaped cross section through short-line matching method |
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| CN108385504A (en) * | 2018-02-07 | 2018-08-10 | 中交公局第二工程有限公司 | A kind of variable cross-section beam sections short-term precast assembly method |
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| CN107476191B (en) * | 2017-07-17 | 2018-10-23 | 中交二航局第二工程有限公司 | Slug matching installs the anchoring temporarily method of pier top box beam |
| CN108385504A (en) * | 2018-02-07 | 2018-08-10 | 中交公局第二工程有限公司 | A kind of variable cross-section beam sections short-term precast assembly method |
| CN108385527A (en) * | 2018-02-07 | 2018-08-10 | 中交公局第二工程有限公司 | A kind of superelevation runoff section segment girder precast measures and monitoring method |
| CN108312307A (en) * | 2018-02-24 | 2018-07-24 | 佛山市知而行信息科技有限公司 | The mold system of short-line prefabrication beam sections |
| CN108412196A (en) * | 2018-05-16 | 2018-08-17 | 中铁十局集团第五工程有限公司 | The construction method of the general roof plate template component of continuous beam and continuous beam top plate |
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| CN109555027A (en) * | 2019-01-26 | 2019-04-02 | 中铁三局集团广东建设工程有限公司 | A kind of beam sections concrete casting system and its construction method |
| CN109555027B (en) * | 2019-01-26 | 2023-12-26 | 中铁三局集团广东建设工程有限公司 | Segmental beam concrete pouring system and construction method thereof |
| CN111452208B (en) * | 2020-06-02 | 2021-07-13 | 中交二航局第四工程有限公司 | Section beam prefabricating assembly line adopting stub matching method |
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| CN113293704B (en) * | 2021-05-21 | 2022-12-06 | 中铁十六局集团第三工程有限公司 | End template of super-tonnage precast box girder and installation method |
| CN113524430A (en) * | 2021-06-10 | 2021-10-22 | 中铁隧道局集团建设有限公司 | Method for prefabricating bridge deck by using stub matching method |
| CN113858412A (en) * | 2021-09-23 | 2021-12-31 | 中交第二航务工程局有限公司 | Segment beam short line matching prefabrication intelligent measurement and control system and use method thereof |
| CN113858412B (en) * | 2021-09-23 | 2022-11-11 | 中交第二航务工程局有限公司 | Segment beam short line matching prefabrication intelligent measurement and control system and use method thereof |
| WO2023045402A1 (en) * | 2021-09-23 | 2023-03-30 | 中交第二航务工程局有限公司 | Intelligent measurement and control system for short-line matching prefabrication of segmental girder, and use method thereof |
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Application publication date: 20170222 |