CN103174095A - Box girder concrete pouring structure with rear-expanding flanges and construction method thereof - Google Patents
Box girder concrete pouring structure with rear-expanding flanges and construction method thereof Download PDFInfo
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- CN103174095A CN103174095A CN2013100860179A CN201310086017A CN103174095A CN 103174095 A CN103174095 A CN 103174095A CN 2013100860179 A CN2013100860179 A CN 2013100860179A CN 201310086017 A CN201310086017 A CN 201310086017A CN 103174095 A CN103174095 A CN 103174095A
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Abstract
The invention discloses a box girder concrete pouring structure with rear-expanding flanges and a construction method thereof. The construction method comprises the following steps: a main body part of the box girder except for flange plates at the two sides are manufactured through concrete pouring; the main body part is transported to pass through a tunnel; a flange plate template of the box girder is set on two sides of the main body part after the main body part passes through the tunnel; flange plate concrete is poured in the flange plate mold; the flange plate mold is detached after the flange plate concrete is solidified, and construction is completed. The box girder is constructed by pouring the flange plates at the two sides of the box girder after the main body part of the box girder passes through the tunnel, and thus the box girder can pass through the tunnel smoothly, construction is convenient, and benefits are high.
Description
Technical field
The present invention relates to a kind of box girder construction, exhibition formula box beam concrete pouring structure and job practices thereof behind especially a kind of edge of a wing.
Background technology
Consult shown in Figure 1, the upper end of loop tunnel 21 is narrower than the middle part, when Beam transportation vehicle 22 transport case beams 23 are crossed tunnel 21, if case beam 23 sizes are larger, when exceeding the width in tunnel, plane, place 21, case beam 23 can't adopt full-scale transportation by tunnel 21, and the part frange plate 24 at case beam 23 two ends can't enter tunnel 21 at this moment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of can passing through smoothly and opens up formula box beam concrete pouring structure and job practices thereof behind the edge of a wing in tunnel.
For realizing above-mentioned technique effect, the invention discloses exhibition formula box beam concrete pouring construction method behind a kind of edge of a wing, described job practices comprises the following steps:
First build and complete the main part of case beam except the frange plate of both sides;
Transport described main part and pass through the tunnel;
After described main part is passed through the tunnel, the frange plate template of setting up described case beam in the both sides of described main part;
The described frange plate concrete of cast in described frange plate template;
After described frange plate concrete setting, remove described frange plate template, complete construction.
Described job practices is further improved and is, when the described frange plate template of construction, first the pouring position of corresponding described frange plate is set up supporting frame on described main part, then establishes described frange plate template in support frame as described above body upper holder.
Described job practices is further improved and is, sets up the support frame as described above body and comprises the following steps:
The spilled water hole that utilizes described main part is fixedly connected on the first end of the crossbeam at support frame as described above body top at the top of described main part;
The first end of the support underframe of support frame as described above body bottom is fixedly connected in the gravity vent of described main part;
The second end of described crossbeam and the second end of described support underframe are locked.
Described job practices is further improved and is, before the described frange plate concrete of cast, in advance at the external coating interleaving agent of described frange plate template.
Described job practices is further improved and is, removes after described frange plate template that frange plate to described moulding by casting carries out transverse stretching and the grouting sealing off and covering anchorage is constructed.
the invention also discloses exhibition formula box beam concrete pouring structure behind a kind of edge of a wing, comprise the main part of case beam except the frange plate of both sides and the frange plate template of described frange plate, described frange plate template is located at the both sides of described main part by the position rack of the corresponding described frange plate of supporting frame, the support frame as described above body further comprises the crossbeam at top and the support underframe of bottom, the first end of described crossbeam is fixedly connected on the top of described main part by the spilled water hole of described main part, the first end of described support underframe is fixedly connected in the gravity vent of described main part, and the second end of described crossbeam and the second end of described support underframe are locked.
Described structure is further improved and is, is provided with plural cushion block between the top of described main part and described crossbeam.
Described structure is further improved and is, is locked by split bolt between the second end of described crossbeam and the second end of described support underframe.
Described structure is further improved and is, the material of described frange plate template is bamboo plywood, and external coating has interleaving agent, and the bottom of described frange plate template is provided with the laterally vertical lumps of wood of the lumps of wood and plural number of plural number.
Described structure is further improved and is, is provided with safety net on described support underframe.
The present invention has been owing to having adopted above technical scheme, makes it have following beneficial effect to be: by in the main part of case beam by behind the tunnel, the method for pouring box beam both sides frange plate can make the case beam smoothly by the tunnel, easy construction, high efficiency.
Description of drawings
Fig. 1 is traditional case beam schematic diagram.
Fig. 2 is the structural representation of exhibition formula box beam concrete pouring structure behind the edge of a wing of the present invention.
Fig. 3 is the structural representation after the frange plate of exhibition formula case beam behind the edge of a wing of the present invention is shaped.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
consult Fig. 2 and shown in Figure 3, behind the edge of a wing of the present invention, exhibition formula box beam concrete pouring structure 1 mainly is made of main part 10 and frange plate template 11 outside the frange plate of case beam both sides, when the case beam designs, the main part 10 of first pouring box beam, reserve spilled water hole 101 and gravity vent 102, and at the frange plate 14 of main part 10 by construction case beam both sides behind the tunnel, utilize the spilled water hole 101 of main part 10 and the position of the corresponding frange plate 14 of gravity vent 102 to set up the supporting frame of frange plate template 11 on main part 10, again frange plate template 11 fixed mounts are located on supporting frame.wherein, supporting frame comprises the crossbeam 12 at top and the support underframe 13 of bottom, the channel-section steel that crossbeam 12 adopts 2 14 is made, its first end 121 is fixedly connected on the top of main part 10 by spilled water hole 101, be provided with plural cushion block 15 between the top of main part 10 and crossbeam 12, the first end 121 of crossbeam 12 further is fixed in spilled water hole 101 by prestress anchorage cable 16, prestress anchorage cable 16 adopts Q235 circle Φ 20 reinforcing bars to make, wear and be fixed in spilled water hole 101, the two ends anchor is tight, with first end 121 anchors of crossbeam 12 tightly between the anchor head and main part 10 of prestress anchorage cable 16, utilize the first end 121 of spilled water hole 101 reinforcing crossmembers 12.Support underframe 13 adopts scaffolding steel pipe, its first end 131 is fixedly connected in the gravity vent 102 of main part 10, be locked by split bolt 17 between the second end 132 of support underframe 13 and the second end 122 of crossbeam 12, on support underframe 13, safety net be set.Frange plate template 11 adopts Φ 14HR335 indented bars 18 to be fixedly connected on crossbeam 12, frange plate template 11 adopts the bamboo plywood of 122cm * 244cm * 1.5cm specification, the bottom is provided with the horizontal lumps of wood 19 of 5cm * 5cm, spacing is 40cm, and the vertical lumps of wood 191 of 10cm * 10cm, spacing 50cm reinforces.
Behind the edge of a wing of the present invention, exhibition formula box beam concrete pouring construction method is specific as follows:
1, first build and complete the main part 10 of case beam except both sides frange plate 14.
2, Beam transportation vehicle transportation main part 10 is passed through the tunnel.
3, after main part 10 was passed through the tunnel, the pouring position of corresponding frange plate 14 was set up the supporting frame of frange plate template 11 on main part 10.
Set up crossbeam 12 and the support underframe 13 of supporting frame, the spilled water hole by main part 10 is fixedly connected on the first end 121 of crossbeam 12 at the top of main part 10, and fastens by prestress anchorage cable 16 anchors;
The first end 131 of support underframe 13 is fixedly connected in the gravity vent 102 of main part 10, by the second end 132 of split bolt 17 positioning and locking support underframes 13 and the second end 122 of crossbeam 12.
4, joint treatment
Crossbeam 12 and support underframe 13 set up in place after, first frange plate 14 place's bending reinforcing steel bars being carried out cut-off processes, to guarantee in reinforcing bar cut-off process that main part 10 edges are concrete complete, the new-old concrete junction is carried out rinsing with clear water after dabbing is processed, and before frange plate 14 concretings the brushing interfacial agents.
5, frange plate template 11 is installed
(1) stencil design
Be the outward appearance of guard box beam, all frange plate templates 11 all adopt the bamboo plywood of 1.22 * 2.44 * 0.012m specification, and secondary joist adopts the horizontal lumps of wood 19 of 5cm * 5cm, and main joist adopts vertical lumps of wood 191 of 10cm * 10cm to reinforce.The long 2.44m of the every joint of frange plate template 11, and be equipped with suitable pipe nipple in order to adjust, the radian of frange plate template 11 processes on the horizontal lumps of wood 19 of secondary joist, and bamboo plywood bends by force and forms;
(2) template is installed
The template rear reply template of marching into the arena is carried out careful comprehensive inspection, and tries assembly unit.
6, reinforcing bar binding and prestress anchorage cable are installed
(1) reinforcing bar binding
All reinforcing bars are completion of processing in beam making field all, and be transported to after the assay was approved the scene through the supervising engineer and carry out colligation, first carry out reinforcing bar binding, should keep clean in template in reinforcement construction, and template surface is protected, to guarantee the concrete outward appearance of frange plate 14.The minimum clean topping of reinforcing bar is except the top board layer is 30mm; all the other are 35mm; and the tail end of tie wire should not stretch in topping; when adopting cushion block 15 to control clean protective layer thickness; cushion block 15 will adopt and the material of case beam with equivalent life, and the durability of guard box beam, and cushion block 15 should stagger mutually; dispersed placement and the gross section that must not traverse topping are by the 4/m of requirement cushion block of " prestressed concrete technology condition "
2
(2) prestress anchorage cable is installed
Prestress wire adopts 1 * 7-15.2-1860-GB/T5224-2003 prestress wire, pipeline forms and adopts the metal bellows pore-forming, when the spreading bellows, joint will be noted good seal, blocking pipe when preventing pouring concrete, and the corrugated pipe connector place will strictly seal, the spreading of bellows adopts bigger homotype bellows as junction block, joint length is 300mm, manages two ends and wraps up in sealant tape or plastic hot draw envelope, in case the seam crossing spillage;
Should avoid bending and un in bellows installation in position process, in case the tube wall cracking also should prevent electric welding spark burn tube wall simultaneously as far as possible;
After bellows is installed, check the position of bellows, whether curve shape meets designing requirement, bellows fixing whether firm, and whether joint is intact, and whether tube wall is damaged etc., if any breakage, in time repairs;
After bellows is fixing, steel strand are put on.
7, frange plate 14 concretings and maintenance
After the 11 installation colligations of frange plate template are located; in interior cast frange plate 14 concrete of frange plate template 11; concrete is by the supply of beam making field mixing station; the position of the fastening degree of careful inspection prestress anchorage cable 16, frange plate template 11, split bolt 17, indented bars 18 and topping cushion block 15, quantity etc. before concreting; and specify the special messenger to do repeated inspection, to improve the quality guarantee rate of concrete cover to reinforcement thickness.
(1) concreting
When concreting was passed continuously, must not surpass 60min off time, must not arbitrarily keep somewhere constuction joint;
(2) concrete vibrating
Take poker vibrator as main, tackling the personnel of vibrating before concreting divides the work, make everyone be responsible for one section, the personnel of respectively vibrating tackle and oneself are responsible in scope lower excellent place and observe in detail, scrutinize, and find out in advance lower excellent position and test, and should note the vibrating head insertion position at reinforcing bar comparatively dense place, in case vibrating spear is difficult to extract, pay special attention to concrete the vibrating in prestress anchorage cable anchor head place when vibrating, and do not collide bellows, advancing slurry with breakage-proof can not stretch-draw;
The operation immersion vibrator, fast inserting pulled out slowly, and vibrating head displacement should be no more than 1.5 times of its sphere of action, every some time of vibration is about 20s-30s, and when vibrating, vibrating head is twitched up and down slightly, is vibrated to the concrete surface bleeding, without sinking, overflow without a large amount of bubbles and be advisable;
(3) receiving slurry wipes one's face
After proposing slurry evener leveling, adopt and manually receive for the first time slurry, approximately after 2 hours, then receive for the second time slurry and wipe one's face;
(4) concrete curing
The complete rear employing straw bag of concreting or gunnysack cover, watering, and the watering number of times to be can keep the abundant humidity of concrete surface as degree, and less than 60% the time, maintenance is no less than 28d when envionmental humidity; When above, maintenance is no less than 14d to relative humidity 60%.When environment temperature during lower than 5 ℃, the precast beam surface should spray curing agent, and takes Insulation, must not sprinkle water to concrete.
8, form removable
When concrete strength reach design strength 60% the time, frange plate template 11 limit moulds can be removed, and should guarantee that frange plate 14 corner angle are complete, when concrete strength, modulus of elasticity reach design strength 100% the time, can carry out stretch-draw, frange plate template 11 bed dies can be removed after stretch-draw, unsuitable form removal when temperature sharply changes, after loosening strenthening member, form removal is by manually utilizing guide chain or little jack to pull out.
9, transverse prestress construction
After water frange plate 14 transverse prestress ropes and adopt single hole list anchor underrelaxation steel strand (fpk=1860Mpa), under every bundle anchor, stretching control force is 1346.2Mpa, concrete strength and modulus of elasticity reach design strength 85% after could stretch-draw, one-sided staggered stretch-draw is adopted in stretch-draw.
Be ready to required ground tackle before stretch-draw, check tensioning equipment, and post tensioning.
Tension sequence is as follows:
0 → initial stress (o ' 0.1con) (making the elongation mark) → 0.2o ' con (the quiet 5min of stopping surveys the elongation) → quiet 5min of the stopping survey of 100%o ' con(elongation) → anchoring
Annotate: o ' con---refer to design stretch-draw prestressing force.
Strictly operate and perform record in stretching process by specification procedure, guarantee that actual stretching force and stretch value reach designing requirement.
1. the cut-out of prestress anchorage cable 16 muscle: stretch-draw finishes, can cut off presstressed reinforcing steel after receiving the notice that permission that peace matter section sends out cuts off prestress anchorage cable 16 muscle, cut off and to use the angle grinding abrasive disk, requiring presstressed reinforcing steel termination to the distance of frange plate 14 termination concrete planes is 3cm, must not be less than 2cm;
2. sealing off and covering anchorage: with the epoxy resin rubber cement, anchor ring bearing plate work anchor intermediate plate girth seam place is coated with envelope before sealing off and covering anchorage;
3. mud jacking: peace and quiet hidden part foreign material and pipeline internal water accumulation before mud jacking, match ratio is provided by test room, pressure is preferably 0.6～0.7MPa, the cement paste that is pressed into pipeline should be full closely knit, cement paste must not surpass 40min from mixing system to the time that is pressed in pipeline, must can be pressed into pipeline after the strainer filtering of hole lattice 2.5 * 2.5mm after cement paste mixes uniform, and treats that slurry outlet goes out underflow rear enclosed slurry outlet, then dwell time 3-5min seals slurry-feeding hole;
4. end-blocking: mud jacking by check without leak annotate pipeline after peace and quiet cave mouth foreign material (dabbing before end-blocking) can carry out end-blocking, before end-blocking, the reply ground tackle carries out waterproofing work, and the end-blocking steel mesh reinforcement is set, utilize installation screw on anchor plate, be screwed into the band hook (hooked) bolt, end-blocking reinforcing bar colligation with it forms cage of reinforcement, and the concrete proportioning of end-blocking is by the given non-shrinkage concrete end-blocking that meets drawing requirement of test room, adopt the artificial process vibration template, to the concrete tamping;
During slip casting, slurries are by rare extremely dense, and the cement paste water/binder ratio is controlled between 1:1～0.6:1, and slurries add early strength admixture and water reducing agent;
Grouting pressure stops pressurization when the rated pressure, drops to 0.6MPa when following until pressure, then continues grouting under pressure.So repeatedly several times, until pressure no longer descends or the interior slurries that flow out of adjacent holes;
The conduit of having annotated slurry stops up the aperture immediately, prevents slurries outflows, solidifies rear employing cement mortar until cement paste the aperture packing is closely knit, presses floating whole.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details in embodiment should not consist of limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (10)
1. open up formula box beam concrete pouring construction method behind an edge of a wing, it is characterized in that described job practices comprises the following steps:
First build and complete the main part of case beam except the frange plate of both sides;
Transport described main part and pass through the tunnel;
After described main part is passed through the tunnel, the frange plate template of setting up described case beam in the both sides of described main part;
The described frange plate concrete of cast in described frange plate template;
After described frange plate concrete setting, remove described frange plate template, complete construction.
2. job practices as claimed in claim 1, it is characterized in that: when the described frange plate template of construction, first the pouring position of corresponding described frange plate is set up supporting frame on described main part, then establishes described frange plate template in support frame as described above body upper holder.
3. job practices as claimed in claim 2 is characterized in that: set up the support frame as described above body and comprise the following steps:
The spilled water hole that utilizes described main part is fixedly connected on the first end of the crossbeam at support frame as described above body top at the top of described main part;
The first end of the support underframe of support frame as described above body bottom is fixedly connected in the gravity vent of described main part;
The second end of described crossbeam and the second end of described support underframe are locked.
4. job practices as claimed in claim 3 is characterized in that: before the described frange plate concrete of cast, in advance at the external coating interleaving agent of described frange plate template.
5. job practices as claimed in claim 4 is characterized in that: remove that the frange plate to described moulding by casting carries out transverse stretching and the construction of grouting sealing off and covering anchorage after described frange plate template.
6. open up formula box beam concrete pouring structure behind an edge of a wing, it is characterized in that: described structure comprises the main part of case beam except the frange plate of both sides and the frange plate template of described frange plate, described frange plate template is located at the both sides of described main part by the position rack of the corresponding described frange plate of supporting frame, the support frame as described above body further comprises the crossbeam at top and the support underframe of bottom, the first end of described crossbeam is fixedly connected on the top of described main part by the spilled water hole of described main part, the first end of described support underframe is fixedly connected in the gravity vent of described main part, and the second end of described crossbeam and the second end of described support underframe are locked.
7. structure as claimed in claim 6, is characterized in that: be provided with plural cushion block between the top of described main part and described crossbeam.
8. structure as claimed in claim 6, is characterized in that: be locked by split bolt between the second end of described crossbeam and the second end of described support underframe.
9. structure as claimed in claim 6, it is characterized in that: the material of described frange plate template is bamboo plywood, and external coating has interleaving agent, the bottom of described frange plate template is provided with the laterally vertical lumps of wood of the lumps of wood and plural number of plural number.
10. structure as claimed in claim 6, is characterized in that: be provided with safety net on described support underframe.
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| CN201310086017.9A CN103174095B (en) | 2013-03-18 | 2013-03-18 | Box girder concrete pouring structure with rear-expanding flanges and construction method thereof |
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| CN201310086017.9A CN103174095B (en) | 2013-03-18 | 2013-03-18 | Box girder concrete pouring structure with rear-expanding flanges and construction method thereof |
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| CN103362069A (en) * | 2013-07-31 | 2013-10-23 | 中铁六局集团有限公司 | Steel and concrete combined box girder concrete wing plate formwork and construction method |
| CN104480858A (en) * | 2014-10-20 | 2015-04-01 | 中建三局第二建设工程有限责任公司 | Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs |
| CN105256769A (en) * | 2015-09-08 | 2016-01-20 | 中国水利水电第五工程局有限公司 | Gate bottom board construction method |
| CN105862599A (en) * | 2016-04-20 | 2016-08-17 | 中铁二十四局集团有限公司 | Construction method of bracket system for suspended casting of T-beam flange plate |
| CN106808564A (en) * | 2017-04-07 | 2017-06-09 | 中铁十七局集团第三工程有限公司 | A kind of three word button box beams end-blocking template and box beam end blocking method |
| CN107806015A (en) * | 2017-10-09 | 2018-03-16 | 中国十七冶集团有限公司 | A kind of unit construction bridge beam flange plate formwork for placing concrete system and construction method |
| CN113106837A (en) * | 2021-04-02 | 2021-07-13 | 长安大学 | Combined box girder wing plate hanging and pouring device capable of adjusting inhaul cable system and construction method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362069A (en) * | 2013-07-31 | 2013-10-23 | 中铁六局集团有限公司 | Steel and concrete combined box girder concrete wing plate formwork and construction method |
| CN103362069B (en) * | 2013-07-31 | 2015-07-08 | 中铁六局集团有限公司 | Steel and concrete combined box girder concrete wing plate formwork and construction method |
| CN104480858A (en) * | 2014-10-20 | 2015-04-01 | 中建三局第二建设工程有限责任公司 | Construction method for sealing anchorage of pre-stress concrete box girder and cross girder anchored troughs |
| CN105256769A (en) * | 2015-09-08 | 2016-01-20 | 中国水利水电第五工程局有限公司 | Gate bottom board construction method |
| CN105256769B (en) * | 2015-09-08 | 2017-03-22 | 中国水利水电第五工程局有限公司 | Gate bottom board construction method |
| CN105862599A (en) * | 2016-04-20 | 2016-08-17 | 中铁二十四局集团有限公司 | Construction method of bracket system for suspended casting of T-beam flange plate |
| CN106808564A (en) * | 2017-04-07 | 2017-06-09 | 中铁十七局集团第三工程有限公司 | A kind of three word button box beams end-blocking template and box beam end blocking method |
| CN106808564B (en) * | 2017-04-07 | 2023-05-26 | 中铁十七局集团第三工程有限公司 | Three-word buckle type box girder end sealing template and box girder end sealing method |
| CN107806015A (en) * | 2017-10-09 | 2018-03-16 | 中国十七冶集团有限公司 | A kind of unit construction bridge beam flange plate formwork for placing concrete system and construction method |
| CN107806015B (en) * | 2017-10-09 | 2019-03-22 | 中国十七冶集团有限公司 | A kind of unit construction bridge beam flange plate formwork for placing concrete system and construction method |
| CN113106837A (en) * | 2021-04-02 | 2021-07-13 | 长安大学 | Combined box girder wing plate hanging and pouring device capable of adjusting inhaul cable system and construction method |
| CN113106837B (en) * | 2021-04-02 | 2022-08-19 | 长安大学 | Combined box girder wing plate hanging and pouring device capable of adjusting inhaul cable system and construction method |
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