CN106284103A - Steel reinforced concrete combination beam roof steel bar concrete high-altitude cantilever pouring construction method - Google Patents
Steel reinforced concrete combination beam roof steel bar concrete high-altitude cantilever pouring construction method Download PDFInfo
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- CN106284103A CN106284103A CN201610699103.0A CN201610699103A CN106284103A CN 106284103 A CN106284103 A CN 106284103A CN 201610699103 A CN201610699103 A CN 201610699103A CN 106284103 A CN106284103 A CN 106284103A
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- girder steel
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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
- E01D21/10—Cantilevered erection
Abstract
The invention discloses a kind of steel reinforced concrete combination beam roof steel bar concrete high-altitude cantilever pouring construction method, including a) first carrying out wing plate tripod and the installation of wing plate template；B (), by using wing plate template as work platforms, carries out chamber inner support system and the installation of chamber template；Carry out after (c) between case, supporting the installation of template between system and case；D () girder steel roof steel bar is installed；The roof steel bar concreting of (e) girder steel；The top board pre-stress system stretch-draw of (f) girder steel；G () stretch-draw completes post jacking sealing off and covering anchorage and carries out the pier consolidation construction of girder steel；H () girder steel roof plate template is removed.The present invention overcomes conventional top plate concrete template in construction process height to be difficult to regulation, and the problem such as insufficient light during form removable in chamber, there is provided a kind of and possess the height facilitating adjusting template, and light required when being provided that form removable in chamber and improve the construction method of the advantages such as work efficiency.
Description
Technical field
The present invention relates to technical field of building construction, specifically refer to a kind of steel-mixed combination beam roof steel bar concrete high-altitude cantilever
Pouring construction method.
Background technology
Along with the fast development of urban construction, the environment become increasingly complex proposes higher requirement to Urban Bridge Construction,
At present steel-mixed combination beam is strong with its span ability, economical, efficiently and be increasingly widely applied.But roof steel bar is mixed
Template used by construction and the falsework of solidifying soil there is also numerous problems, such as in construction: the height of template is difficult to adjust
Joint, when needing to readjust height after usual model sheetinstallat, is now to need to expend the biggest engineering, time-consuming, arduously, wave especially
Taking resource, secondly in roof steel bar concrete construction, falsework consumptive material is bigger, it will usually cut substantial amounts of material to build phase
To safety, stable support, being that the peace of falsework tears problem open again, the especially form removable in chamber, because of case room light
Line is not enough, makes the dismounting of the falsework in chamber be awkward.
Summary of the invention
It is an object of the invention to overcome conventional top plate concrete template in construction process height to be difficult to regulation, and template in chamber
The problems such as insufficient light during dismounting, it is provided that a kind of possess the height facilitating adjusting template, and is provided that form removable in chamber
The light of Shi Suoxu and the steel of raising work efficiency-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method.
The present invention is achieved through the following technical solutions: steel-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method,
Comprise the following steps:
A () first carries out wing plate tripod and the installation of wing plate template；
B (), by using wing plate template as work platforms, carries out chamber inner support system and the installation of chamber template；
Carry out after (c) between case, supporting the installation of template between system and case；
D () girder steel roof steel bar is installed；
The roof steel bar concreting of (e) girder steel；
The top board pre-stress system stretch-draw of (f) girder steel；
G () stretch-draw completes post jacking sealing off and covering anchorage and carries out the pier consolidation construction of girder steel；
H () girder steel roof plate template is removed.
Arrangement and method for construction is first worked out, wherein to wing plate tripod and wing plate template, chamber inner support before said method step
Support template etc. between system and case between system and chamber template, case and carry out loading test, checking Structure Calculation result and the safety of structure
Property, each template can be grasped in real time and support the limit and the ability to bear of system, the safety problem of more fully prevention and control template, compile
First wing plate tripod is installed after making arrangement and method for construction, adjustable wing plate tripod is placed in reinforcing bar wing plate and girder steel abdomen
At plate, being placed on wing plate tripod by the transverse and longitudinal lumps of wood after fixing wing plate tripod, the lumps of wood is conducive to load assignment uniform, subtracts
The deformation of few wing plate template, after wing plate tripod and wing plate model sheetinstallat complete, by opening using wing plate template as work platforms
Chamber inner support system and the installation of chamber template are installed in exhibition, and support bar is first placed on chamber by the installation of chamber inner support system template
In, supporting bar top is laid support beam, support beam is placed at girder steel wing plate, and in support beam, security protection is conducive to load assignment
The uniform lumps of wood, installs the chamber template with passage, by being provided with the chamber template of passage on this lumps of wood again
Insufficient light reason convenient transmission material simultaneously during form removable in satisfiable solution chamber, chamber model sheetinstallat completes
After, then carry out between case, supporting the installation of template between system and case, support system between case and be provided with T-steel muscle and to pull bar, by T-steel muscle
Full weld, on girder steel wing plate, arranges double-row steel pipe on T-steel muscle, double-row steel pipe and T-steel muscle is fixed by fixing lid, case
Between support system and be additionally provided with pull bar, pull bar is sequentially passed through fixing lid and double-row steel pipe, to bottom pull bar, template between case is hung
Fix to girder steel wing plate and by WELDING STUDS, support system between this case and formwork structure is simple, convenient to assemble and disassemble, all model sheetinstallat
After completing, clear up template, mark out the end face of roof steel bar concrete in wing plate template side, by the wing plate tripod that can regulate
The height making wing plate template meets construction requirement, reduce because of can not the doing over again of the unnecessary work that brings of adjusting template height, tune
After having saved the height of shuttering supporting system, and then roof steel bar, the body after roof steel bar completes, in carrying out pre-stress system are installed
Internal beam is installed, and internal beam tube road uses plastic film capicitor, after Pipe installing completes, then carries out prestressed lashing, erecting and welding
Time note protecting corrugated tube, have and damaged repair in time, it is to avoid later rework, after internal bundle installation, carry out girder steel top board and mix
Pouring of solidifying soil, girder steel top board pours employing C50 non-shrinkage concrete, after concrete reaches 100% design strength, fixing body
Outer rope, after external tendon installation, and then the stretch-draw to girder steel top board pre-stress system, in pretensioning external tendon stretch-draw body again
Bundle, internal Shu Zhangla completes post jacking sealing off and covering anchorage and carries out the pier consolidation construction of girder steel, after whole construction completes, at prestressing force cloth
When putting, arranging the manhole of 1*1m at stretch-draw port top board, this manhole arranges one along bridge to spacing the most about 12m, and last template is entered
Row is removed, and first removes wing plate tripod and wing plate template, then removes chamber inner support system and chamber template, finally removes and props up between case
Template between support system and case, uses above-mentioned construction method can effectively shorten the engineering time, improves efficiency of construction, has efficient warp
Ji effect, whole constructing operation is safe and reliable.
Further, in described step (1), wing plate tripod is mainly made up of main vertical rod, cross bar, lower boom, described cross bar
Being perpendicular to main vertical rod, lower boom is connected with main vertical rod and cross bar respectively, and main rod end is by high-strength bolt with girder steel wing plate even
Connecing, described lower boom is connected with steel beam web plate by jacking, and described cross bar is additionally provided with at least one jacking that can regulate, horizontal
Also being welded with hanging basket below bar, cross bar free end is additionally provided with guardrail, and described wing plate tripod is provided with safety net, described safety
The two ends of net are suspended on lower boom and guardrail respectively, and described wing plate tripod is arranged above the transverse and longitudinal lumps of wood.
Further, in described step (a), the installation steps of wing plate tripod and wing plate template are as follows:
(a.0) winch to specify position by wing plate tripod with crane；
(a.1) by jacking, lower boom and the steel beam web plate of wing plate tripod are connected；
(a.2) at junction fixture by urgent for bottom jacking；
(a.3) this fixture is strengthened fixing with girth member again；
(a.4) the main rod end of wing plate tripod is connected by high-strength bolt and girder steel wing plate are fixing；
(a.5) with glass cement, nut is closed after high-strength bolt is twisted eventually；
(a.6), after installing wing plate tripod, wing plate tripod is installed the transverse and longitudinal lumps of wood；
(a.7) after installing the transverse and longitudinal lumps of wood, according to the jacking on designed elevation regulation wing plate tripod top；
(a.8) wing plate template is fixedly placed on the lumps of wood；
(a.9) hanging basket is welded on the cross bar of wing plate tripod；
(a.10) finally wing plate safety net is suspended on lower boom and guardrail.
Further, described step (b) raising middle flask indoor support owner to be made up of support beam and at least two support bars, described
Support beam is provided above at least one lumps of wood, and lower section is connected with support bar by the jacking that can overregulate, described support bar it
Between be additionally provided with horizontal bracing piece, be connected with the pad in chamber bottom support bar.
Further, the installation steps of described step (b) chamber inner support system and chamber template are as follows:
(b.0) support bar is placed in chamber using wing plate template as work platforms；
(b.1) it is connected fixing with the pad of chamber inner bottom part for support bar；
(b.2) then horizontal bracing piece is installed on support bar；
(b.3) support beam is laid at girder steel wing plate by the jacking by regulating；
(b.4) lumps of wood is installed after in support beam；
(b.5) finally the chamber template with passage is placed on the lumps of wood.
Further, support owner between described step (c) raising middle flask by T-steel muscle and pull bar to be constituted, at the bottom of described T-steel muscle
Portion's full weld is on girder steel wing plate, and double-row steel pipe and T-steel muscle are fixed by top by fixing lid, supports system and also set up between described case
Having pull bar, described sequentially pass through pull bar fixes lid and double-row steel pipe, to template between case is solid by WELDING STUDS bottom pull bar
It is scheduled at girder steel wing plate.
Further, the installation steps of template between system and case are supported between described step (c) case:
(c.1) first by T-steel muscle full weld on girder steel wing plate；
(c.2) secondly double-row steel pipe is installed in T-steel top rib portion；
(c.3) fixing lid is installed again and double-row steel pipe is fixed on T-steel top rib end；
(c.4) pull bar will be sequentially passed through fixing lid and double-row steel pipe from secondary；
(c.5) finally to winching to template between case bottom pull bar fix at girder steel wing plate and with WELDING STUDS.
Further, pre-stress system stretch-draw described in described step (f) includes the stretch-draw of internal bundle and external tendon, prestressing force
System stretch-draw step is as follows:
(f.0) pretensioning external tendon；
(f.1) stretch-draw body is interior again restraints；
(f.2) elongation of stretch-draw is checked；
(f.3) stretch-draw completes post jacking sealing off and covering anchorage.
Further, in described step (e), girder steel top board pours employing C50 non-shrinkage concrete.
The present invention compared with prior art, has the advantage that and has the beneficial effect that
(1) be conducive to job site ground weak by this most above-mentioned construction method or structure be too high, and have under bridge and be open to traffic,
The situation of the construction inconvenience such as the high-altitude overhanging of support, whole construction method are set up in inconvenience, and template facilitates peace to tear open, improve work effect
Rate, has good Social benefit and economic benefit；
(2) by arranging the jacking that can regulate on wing plate tripod, the height of wing plate template can be adjusted, effectively
Solving the problem that template is difficult to regulate, this simple in construction, function is strong；
(3) by arranging passage in chamber template, inner support system between case can be solved and hinder because of insufficient light when removing
Hindering the problems such as dismounting, beneficially operator facilitate form removal；
(4) between case, template uses the mode hanging mould to construct, and between case, braced framing is simple, is greatly shortened template between this case and executes
The difficulty of work.
Accompanying drawing explanation
Fig. 1 is the construction flow chart of the present invention；
Fig. 2 is wing plate tripod and the wing plate formwork structure schematic diagram of the present invention；
Fig. 3 is chamber inner support system and the chamber formwork structure schematic diagram of the present invention；
Fig. 4 be the present invention case between support system and case between template schematic diagram；
Fig. 5 is that between case of the present invention, support is side view；
Wherein: 1 main vertical rod, 2 lower booms, 3 cross bars, 4 jackings, 5 lumps of wood, 6 safety nets, 7 hanging baskets, 8
Strut, 9 support beams, 10 pads, 11 horizontal bracing pieces, 12 passages, 13 double-row steel pipes, the 14 pairs of pull bars,
15 fixing lids, 16 T-steel muscle.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention is not limited to this,
Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacing
Change and change, all should be included within the scope of the invention.
Embodiment:
Present embodiment discloses a kind of steel-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, mainly for overcoming
In the past top plate concrete template in construction process height was difficult to regulation, and the problem such as insufficient light during form removable in chamber, carried
The height facilitating adjusting template is possessed for a kind of, and light required when being provided that form removable in chamber and improve work efficiency etc.
Feature, whole construction procedure is as shown in Figure 1.
First it is that wing plate tripod is as in figure 2 it is shown, set according to construction loads to wing plate tripod and the installation of wing plate template
Meter, uses Q235 steel pipe steel to be made, the most main vertical rod 1 and lower boom 2 stress bigger employing Φ 70 × 4.5mm steel pipe,
Remaining steel pipe uses Φ 48 × 3.5mm steel pipe assembly welding to make, and main vertical rod 1 end is strengthened with 10mm steel plate because stress complexity uses
Form.Main vertical rod 1 top of wing plate tripod is fixed to be connected with girder steel wing plate by high-strength bolt and is tightened, twist at the beginning of tightening point,
Twist eventually, with glass cement, nut is completely enclosed after twisting eventually, bottom wing plate tripod lower boom 2 by jacking 4 with steel beam web plate even
Connect, at junction fixture timber wedge by urgent for the jacking 4 of bottom, make timber wedge fit more closely steel beam web plate, finally exist
This being reinforced fixing with girth member nail nail, cross bar 3 is perpendicular to main vertical rod 1, and cross bar 3 free end is additionally provided with guardrail, wing plate triangle
Frame arranges a Pin along the every 1m of bridge length direction, is finally linked into an integrated entity, on wing plate set square by wing plate tripod Pin Pin with steel pipe
Installing the lumps of wood 5 of transverse and longitudinal three row, the lumps of wood 5 utilizes load to be uniformly distributed, and accurately releases bridge sideline on wing plate template side
And indicate elevation, the jacking 4 that can regulate on wing plate tripod top regulates wing plate tripod makes template be placed in corresponding absolute altitude,
Wing plate tripod cross bar 3 is also welded with hanging basket 7, hanging basket 7 completely spreads the lumps of wood 5 as unloading body panel, and at wing plate tripod
Bottom also hang two-layer safety net 6 be set, safety net 6 is connected with lower boom 2 and backplate respectively.
Wing plate support system and wing plate model sheetinstallat good after, using wing plate template as work platforms carry out chamber inner support system with
The installation of template between case, such as Fig. 3, support bar 8 is placed in chamber by operator, support bar 8 and the pad of chamber inner bottom part
10 vertically fix, and then install horizontal bracing piece 11 on support bar 8, and support bar 8 top is also equipped with support beam 9, support beam 9
The lumps of wood 5 is laid in top, and it is uniform that the lumps of wood 5 is beneficial to load assignment, finally installs template between the case with passage 12, template shape between case
Shape is chamfer shape, and chamfering formwork needs the thickness of strict bracing wire controlroof reinforced concrete.
After chamber inner support system and chamber model sheetinstallat, then carry out supporting between case the installation of template between system and case, as Fig. 4,
Fig. 5, by T-steel muscle 16 full weld on girder steel wing plate, keeps vertically, after having welded T-steel muscle 16, on T-steel muscle 16 top
Double-row steel pipe 13 is installed, by fixing lid 15, double-row steel pipe 13 and T-steel muscle 16 is fixed, support system between case and be additionally provided with drawing
Bar 14, sequentially passes through fixing lid 15 and double-row steel pipe 13, winches to girder steel wing plate to bottom pull bar 14 by hanging mould between case pull bar 14
Place, and with WELDING STUDS, template between case is fixed, arranging support between case along bridge to every 70cm spacing is and template between case, in conjunction with girder steel
Roof steel bar is practiced integral by supporting template transverse and longitudinal between system and case between case, and enhanced stability avoids load-bearing unstability.
After completing above-mentioned model sheetinstallat, template is cleared up, on template side, after cleaning, first indicates top of concrete,
Carry out again roof steel bar is installed, note when roof steel bar is installed controlling thickness of protection tier, after reinforcement installation completes, carrying out
The installation of internal bundle in pre-stress system, first fixing body internal beam pipeline, internal beam tube road uses plastic film capicitor, plastic film capicitor
Having good airproof performance, air tight, water-tight, joint can use seal nipple or special plastic welder, and spillage of material is little, becomes
The advantages such as this is low, after plastic film capicitor installation, then carry out lashing.
After girder steel roof steel bar and internal bundle installation, just carrying out pouring of roof steel bar concrete, roof steel bar pours
Using C50 non-shrinkage concrete, concrete roof uses two pumps car to complete from two lateral middle tunneling boring one-time-concretings, pours
After completing, to concrete vibrating, employing of vibrating is determined people and is determined a post, and anti-leak-stopping pounded to be smash, and before concrete initial set, manually knocks off and draws
Hair, after concrete initial set, shines water curing to beam slab and is paved with work cloth.
External tendon in prestressed system after finally concrete has reached 100% design strength, external tendon installs
Just carrying out top board pre-stress system stretch-draw, pretensioning external tendon after one-tenth, then carry out the stretch-draw of internal bundle, prestressed stretch-draw is all adopted
Using two ends stretch-draw, with stretching control force control during stretch-draw, elongation is proofreaded, and prestressed stretch-draw completes post jacking sealing off and covering anchorage and carries out steel
The pier consolidation construction of beam.
After whole construction completes, finally construction formwork is removed, first by wing plate template from the lumps of wood 5 split out, then
Operator stand in tear open and are unscrewed high-strength bolt by side to opposite side on the hanging basket 7 of body panel, are unscrewed by nail nail, and take out wood
Wedge, then hangs down with crane, the form removable in chamber, unloading rear support system is taken out from manhole, and the template between case first will
WELDING STUDS is unscrewed, and then template is hung down with steel wire, after form removable is cleaned out, seals manhole.
One is to use method disclosed by the invention too high to job site ground weakness or structure, and has logical under bridge
Car, inconvenience sets up the situation of the construction inconvenience such as the high-altitude overhanging of support, whole construction method, and template facilitates peace to tear open, improves work
Efficiency, has good Social benefit and economic benefit；
Two is by simplifying shuttering supporting system, reduces working strength, has efficient efficiency of construction, it is to avoid the wave that material is unnecessary
Take；
Three is to achieve good social benefit by construction method disclosed by the invention, and shortens time duration, has aobvious
The economic benefit write.
From the point of view of practice engineering, certain engineering whole process is continuous viaduct, and bridge is designed by left and right two width independence bridges,
Left width mileage Z11+724.607 ~ Z11+810.815 totally 1 85.2m, right width mileage Y11+728.182 ~ Y12+007.718 totally 3
Connection 279.7m is steel-mixed combined beam structure, maximum span 71m.Single width bridge is made up of three steel-concrete associating beams, and top board is
Reinforced concrete structure, wing plate is encorbelmented and is reached 2.1m.This engineering uses this engineering method Z9 landing plate of having constructed to pour.Construction is fast
Speed, concrete smooth closely knit, lines are smooth and easy, appearance luster is consistent, won the consistent favorable comment of owner.Facts have proved and use this
Bright construction method has safety, high-quality, the feature such as efficient.
The above, be only presently preferred embodiments of the present invention, and the present invention not does any pro forma restriction, every depends on
Any simple modification of being made above example according to the technical spirit of the present invention, equivalent variations, each fall within the protection of the present invention
Within the scope of.
Claims (9)
1. steel-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, it is characterised in that: comprise the following steps:
A () first carries out wing plate tripod and the installation of wing plate template；
B (), by using wing plate template as work platforms, carries out chamber inner support system and the installation of chamber template；
Carry out after (c) between case, supporting the installation of template between system and case；
D () girder steel roof steel bar is installed；
The roof steel bar concreting of (e) girder steel；
The top board pre-stress system stretch-draw of (f) girder steel；
G () stretch-draw completes post jacking sealing off and covering anchorage and carries out the pier consolidation construction of girder steel；
H () girder steel roof plate template is removed.
Steel the most according to claim 1-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: in described step (a), wing plate tripod is mainly made up of main vertical rod (1), cross bar (3), lower boom (2), and described cross bar (3) hangs down
Straight in main vertical rod (1), lower boom (2) is connected with main vertical rod (1) and cross bar (3) respectively, and high-strength bolt is passed through on main vertical rod (1) top
Being connected with girder steel wing plate, described lower boom (2) is connected with steel beam web plate by jacking (4), and described cross bar is additionally provided with at least on (3)
One jacking that can regulate (4), cross bar (3) lower section is also welded with hanging basket (7), and cross bar (3) free end is additionally provided with guardrail, described
Being provided with safety net (6) on wing plate tripod, the two ends of described safety net (6) are suspended on lower boom (2) and guardrail respectively, institute
State wing plate tripod and be arranged above the transverse and longitudinal lumps of wood (5).
Steel the most according to claim 2-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: in described step (a), the installation steps of wing plate tripod and wing plate template are as follows:
(a.0) winch to specify position by wing plate tripod with crane；
(a.1) by jacking (4), lower boom (2) and the steel beam web plate of wing plate tripod are connected；
(a.2) at junction fixture by urgent for bottom jacking (4)；
(a.3) this fixture is strengthened fixing with girth member again；
(a.4) main vertical rod (1) top of wing plate tripod is connected by high-strength bolt and girder steel wing plate are fixing；
(a.5) with glass cement, nut is closed after high-strength bolt is twisted eventually；
(a.6), after installing wing plate tripod, wing plate tripod is installed the transverse and longitudinal lumps of wood (5)；
(a.7) after installing the transverse and longitudinal lumps of wood (5), according to the jacking (4) on designed elevation regulation wing plate tripod top；
(a.8) wing plate template is fixedly placed on the lumps of wood (5)；
(a.9) hanging basket (7) is welded on the cross bar (3) of wing plate tripod；
(a.10) finally wing plate safety net (6) is suspended on lower boom (2) and guardrail.
Steel the most according to claim 1-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: described step (b) raising middle flask indoor support owner to be made up of support beam (9) and at least two support bars (8), described support beam
(9) being provided above at least one lumps of wood (5), lower section is connected with support bar (8) by the jacking (4) that can overregulate, described
Being additionally provided with horizontal bracing piece (11) between strut (8), support bar (8) bottom is connected with the pad (10) in chamber.
Steel the most according to claim 4-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: the installation steps of described step (b) chamber inner support system and chamber template are as follows:
(b.0) support bar (8) is placed in chamber using wing plate template as work platforms；
(b.1) it is connected fixing with the pad (10) of chamber inner bottom part for support bar (8)；
(b.2) then at support bar (8) the horizontal bracing piece of upper installation (11)；
(b.3) support beam (9) is laid at girder steel wing plate by the jacking (4) by regulating；
(b.4) after, the lumps of wood (5) is installed in support beam (9)；
(b.5) finally the chamber template with passage (12) is placed on the lumps of wood (5).
Steel the most according to claim 1-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: supporting owner between described step (c) raising middle flask to be constituted by T-steel muscle (16) with to pull bar (14), described T-steel muscle (16) end
Portion's full weld is on girder steel wing plate, and double-row steel pipe (13) and T-steel muscle (16) are fixed, between described case by top by fixing lid (15)
Supporting system and be additionally provided with pull bar (14), described sequentially pass through pull bar (14) fixes lid (15) and double-row steel pipe (13), to drawing
Template between case is fixed at girder steel wing plate by bar (14) bottom by WELDING STUDS.
Steel the most according to claim 6-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In；Support between described step (c) case and be and the installation steps of template between case:
(c.1) first by T-steel muscle (16) full weld on girder steel wing plate；
(c.2) double-row steel pipe (13) is secondly installed on T-steel muscle (16) top；
(c.3) fixing lid (15) is installed again and double-row steel pipe (13) is fixed on T-steel muscle (16) top；
(c.4) pull bar (14) will be sequentially passed through fixing lid (15) and double-row steel pipe (13) from secondary；
(c.5) finally winch to fix at girder steel wing plate and with WELDING STUDS by template between case to pull bar (14) bottom.
Steel the most according to claim 1-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction method, its feature exists
In: pre-stress system stretch-draw described in described step (f) includes the stretch-draw of internal bundle and external tendon, pre-stress system stretch-draw step
As follows:
F.0) pretensioning external tendon；
(f.1) stretch-draw body is interior again restraints；
(f.2) elongation of stretch-draw is checked；
(f.3) stretch-draw completes post jacking sealing off and covering anchorage.
9. according to the steel described in any one in claim 1-8-mixed combination beam roof steel bar concrete high-altitude cantilever pouring construction party
Method, it is characterised in that: in described step (e), girder steel top board pours employing C50 non-shrinkage concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958345A (en) * | 2017-05-16 | 2017-07-18 | 简华炽 | A kind of adjustable rigid Hanging Basket |
| CN111535197A (en) * | 2020-05-21 | 2020-08-14 | 中冶建工集团有限公司 | Pier column construction method |
| CN112832137A (en) * | 2021-01-07 | 2021-05-25 | 安徽省公路桥梁工程有限公司 | Steel box-concrete combined beam bridge deck formwork system and construction method |
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| CN106284103B (en) | 2018-01-02 |
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