CN102619331A - Once molding construction method of beam-type conversion layer of high-rise building by steel pipe supporting and laminated pouring - Google Patents
Once molding construction method of beam-type conversion layer of high-rise building by steel pipe supporting and laminated pouring Download PDFInfo
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- CN102619331A CN102619331A CN2011100560828A CN201110056082A CN102619331A CN 102619331 A CN102619331 A CN 102619331A CN 2011100560828 A CN2011100560828 A CN 2011100560828A CN 201110056082 A CN201110056082 A CN 201110056082A CN 102619331 A CN102619331 A CN 102619331A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000000465 moulding Methods 0.000 title abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 5
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Abstract
The invention relates to a once molding construction method of a beam-type conversion layer of a high-rise building by steel pipe supporting and laminated pouring. The once molding construction method comprises the following steps of: determining a reinforcing steel bar addition scheme of an auxiliary steel beam of a conversion layer and a first beam plate and a second beam plate lower than the conversion layer; mounting a template support frame of the second beam plate lower than the conversion layer, paving a template of the second beam plate lower than the conversion layer, manufacturing a reinforcing steel bar structure of the second beam plate lower than the conversion layer, and pouring concrete to the second beam plate lower than the conversion layer; mounting a template support plate of the first beam plate lower than the conversion layer, paving a template of the first beam plate lower than the conversion layer, and manufacturing a reinforcing steel bar structure of the first beam plate lower than the conversion layer; mounting the auxiliary steel beam of the conversion layer, mounting the template support frame of the beam plate of the conversion layer, paving the template of the beam plate of the conversion layer, and manufacturing the reinforcing steel bar structure of the beam plate of the conversion layer; pouring the concrete to the first beam plate lower than the conversion layer and the conversion layer; and dismantling the template support frame of the beam plate of the conversion layer, the auxiliary steel beam, and the template support frames of the first beam plate and the second beam plate lower than the conversion layer. According to the once molding construction method disclosed by the invention, supporting materials of the template can be reduced, the construction period is reduced, and the engineering quality of the beam plate is ensured.
Description
Technical field
The present invention relates to a kind of conversion layer job practices of highrise building.
Background technology
Because different construction level functions of use require different spatial division to arrange in the highrise building, requiring has different structural forms, at the handing-over position of two kinds of structures transition structure is set, and it is exactly a conversion layer.The beam slab cross section of beam-type transition layer is big, and from great, difficulty of construction is big.Be directed against beam-type transition layer construction conventionalloading TRANSFER METHOD multilayer formwork, these two kinds of beam-type transition layer template support schemes of superimposed casting method formwork at present in the engineering.Load Transfer fado layer formwork need all remain into the bottom surface after the conversion layer concrete builds to the formwork-support of conversion layer beam slab, takies a large amount of template backing materials, and engineering cost is high.Superimposed casting method need be built branch 2-3 time with the conversion layer concrete and accomplished, and builds lower beam earlier, treat that concrete strength reaches 100% after, build middle part beam and top beam again.Exist the duration to grow in the construction, the beam slab workmanship is influenced problems such as bigger.
Summary of the invention
The present invention aims to provide a kind of highrise building beam-type transition layer steel pipe and supports the superimposed one-shot forming job practices of building, and it can reduce template backing material and reduction of erection time, assurance beam slab workmanship.
Technical scheme of the present invention is: highrise building beam-type transition layer steel pipe supports the superimposed one-shot forming job practices of building, and the step that comprises has:
Steps A, confirm auxiliary girder steel of conversion layer and conversion layer next, two layers of beam slab add the scheme of reinforcing bar;
Step B sets up the formwork-support of the following two layers of beam slab of conversion layer, and the template of the following two layers of beam slab of shop conversion layer is made the bar construction of the following two layers of beam slab of conversion layer, and the following two layers of beam slab concrete of conversion layer are built;
Step C sets up the formwork-support of one deck beam slab under the conversion layer, and the template of one deck beam slab under the conversion layer of shop is made the bar construction of one deck beam slab under the conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of shop conversion layer beam slab, the bar construction of making conversion layer beam slab;
Step D, one deck beam slab concrete is built under the conversion layer, and conversion layer beam slab concrete is built;
Step e is removed the formwork-support of conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.
Highrise building beam-type transition layer steel pipe of the present invention supports the superimposed one-shot forming job practices of building; Through add the steel reinforced conversion layer next, the intensity of two layers of Vierendeel girder, use auxiliary girder steel that the deadweight of conversion layer beam slab and the major part of construction load are unloaded to following two layers of Vierendeel girder; The formwork-support that keeps one deck beam slab under the conversion layer in the construction is unloaded to the deadweight of one deck beam slab under the conversion layer and the load of constructing on the following two layers of Vierendeel girder of conversion layer through them.The present invention carries out superimposed stressed unloading and handles, and does not need to implement the multilayer template from bottom and supports, and the deadweight of conversion layer beam slab and working load are all carried by the following two layers of Vierendeel girder of conversion layer.Must not make other complex technologys and handle, simple to operate, the convenient construction operation is easy to quality control, saves a large amount of backing materials.One deck beam slab concrete is built to build continuously with conversion layer beam slab concrete and is carried out under the conversion layer of the present invention, has shortened the duration greatly; Particularly the conversion layer beam slab need not divide and builds moulding 2 times or 3 times, and conversion layer beam slab once mounting template is watered and smash moulding, has avoided layering to water and has smash the adverse effect to conversion layer beam slab concrete total quality.
Description of drawings
Fig. 1 supports superimposed main construction process sketch map of building the one-shot forming job practices for highrise building beam-type transition layer steel pipe of the present invention.
Fig. 2 is one of braced structures figure of conversion layer template.
Fig. 3 be the conversion layer template braced structures figure two.
Fig. 4 is for there being the braced structures sketch map of the corresponding Liang Chu of following one deck under the conversion layer beam.
Fig. 5 does not have the braced structures sketch map of the corresponding Liang Chu of one deck down down for the conversion layer beam.
Fig. 6 is a kind of structural representation of auxiliary girder steel.
Fig. 7 is one of braced structures figure under the conversion layer beam.
Fig. 8 is two of the braced structures figure under the conversion layer beam.
Fig. 9 is three of the braced structures figure under the conversion layer beam.
The specific embodiment
Highrise building beam-type transition layer steel pipe of the present invention supports superimposed main construction process of building the one-shot forming job practices, and is as shown in Figure 1:
Steps A, confirm auxiliary girder steel of conversion layer and conversion layer next, two layers of beam slab add the scheme of reinforcing bar.In the Designing Structures of High Rising Buildings stage, owing to consider wind load and seismic load, its load effect embodies sectional dimension in the beam column of bottom bigger, and arrangement of reinforcement is more, and supporting capacity is higher.When constructing in the bottom, because upper load, construction vibrations load and most wind load are not applied on the structure as yet, structure bottom beam column has very big supporting capacity deposit.During the conversion layer construction, can make full use of the supporting capacity deposit of lower floor's beam column.Conversion layer next, when two layers of local Vierendeel girder supporting capacity are not enough, can increase the arrangement of reinforcement of associated frame members beam; Deadweight and the working load that makes the conversion layer beam slab by conversion layer next, two layers of Vierendeel girder and supporting system thereof bear and pass and receive to the bottom beam column to the basis.Each vertical rod of conversion layer template bearing support unloads by the mechanics transfer principle with horizontal brace, bridging, the bar of sweeping the floor.Please referring to Fig. 2 and Fig. 3.The weight of conversion layer beam slab 2 (comprise on conversion layer Vierendeel girder 21 and the conversion layer Vierendeel girder 21 floor 22) is transmitted downwards by conversion layer template bearing support with the construction dynamic loading.The weight of one deck beam slab 1 under the conversion layer (comprising the floor 12 on one deck Vierendeel girder 11 under one deck Vierendeel girder under the conversion layer 11 and the conversion layer) is transmitted downwards by one deck template bearing support under the conversion layer with the construction dynamic loading.For the conversion layer Vierendeel girder corresponding Vierendeel girder 11 places of one deck under the conversion layer are arranged for 21 times, through the bracing frame 4 in template 3, the headblock a tree, used in making timber for boats 5 that each pole steel tube bottom adds 20 centimetres of 20 cm x is with the Vierendeel girder of Load Transfer one deck under the conversion layer, please referring to Fig. 4.For unmatchful Vierendeel girder 11 places of answering of one deck under the conversion layer under the conversion layer Vierendeel girder 21; Through the bracing frame in template 3 be provided with for 4 times auxiliary girder steel 6 (steel I-beam or steel channel beam and their support column) with Load Transfer under the conversion layer on two layers the Vierendeel girder, please referring to Fig. 5.
Step B sets up the formwork-support of the following two layers of beam slab of conversion layer by such scheme, and the template of the following two layers of beam slab of shop conversion layer is made the bar construction of the following two layers of beam slab of conversion layer, and the following two layers of beam slab concrete of conversion layer are built.These are routine operation, are not described further.
Step C sets up the formwork-support of one deck beam slab under the conversion layer by such scheme, and the template of one deck beam slab under the conversion layer of shop is made the bar construction of one deck beam slab under the conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of shop conversion layer beam slab, the bar construction of making conversion layer beam slab.After the following two layers of beam slab concrete strength of layer to be converted reach 100%, set up the formwork-support of one deck beam slab under the conversion layer, the template of one deck beam slab under the conversion layer of shop, the bar construction of one deck beam slab under the making conversion layer; Under conversion layer one deck beam slab above set up the auxiliary girder steel 6 of conversion layer; Auxiliary girder steel 6 two ends are provided with steel column and are fixed on following two layers of Vierendeel girder of conversion layer and the column, so as with the Load Transfer of conversion layer beam slab on the following two layers of Vierendeel girder of conversion layer and column at auxiliary girder steel 6 two ends.The end bearing place is provided with steel plate cushion block 7 on the steel column at auxiliary girder steel 6 two ends, avoids auxiliary girder steel 6 stress deformations to cross under senior general's Load Transfer to the conversion layer on the first floor plate, in order to avoid cause floor because of stressed cracking.Please referring to Fig. 6,61 on the girder steel of auxiliary girder steel 6 is with tension rib (12 millimeters reinforcing bars of Φ) welding, with the stability that guarantees that it is whole.If girder steel 61 adopts channel-section steels, must be through calculating and setting put more energy into muscle 63 or stiffening rib.Actual construction situation is please referring to Fig. 7, Fig. 8 and Fig. 9.
When setting up formwork-support, all hounds are by being less than or equal to the 45 setting, and array pitch vertically is 0.6 meter along cylinder; Hound is coordinated with the outer steel of beam bottom board plate is stupefied mutually at the bottom of the beam; Spacing is 400 millimeters, and its upper end extends at the bottom of the template and outer steel is stupefied is interlockingly connected with the mould of beam, and does two fastener antiskids and move insurance; The interior groove of setting the short muscle in position that the lower fulcrum principal post face of hound is reserved, the lower fulcrum of row's hound is the post root of place floor down.All hounds will be as far as possible with beam under vertical rod, the cross bar of framed bent be interlockingly connected (with turning to fastener); Set up simultaneously with the full hall of floor frame disjunctor simultaneously; Must guarantee before the crossbeam cage of reinforcement is in place, to set up and finish; To guarantee that framed bent is stressed synchronously under diagonal brace support and the beam, to strengthen the globality and the stability of diagonal brace support.
In the construction of the vertical rod and the bar of sweeping the floor, should be noted that: the upper end of vertical rod directly with at the bottom of the beam in stupefied, outer stupefiedly be interlockingly connected respectively (in outer stupefied being close to stupefied below), move insurance thereby form pair fastener antiskids.The lower end of vertical rod is supported on the steel cushion block that is provided with on the elongated plank of laying on the flooring.Framed bent is divided into the bar of sweeping the floor under the beam, and twice size cross bar is established in the centre, framed bent both sides at the bottom of the beam, and the horizontally set diagonal brace vertically is provided with two limb bridgings, simultaneously framed bent under the beam and the full hall of floor frame is linked as integral body, to increase the space rigidity of framed bent.
In the construction that steel pipe supports, should be noted that: in the support system, must notice checking whether timber wedge holds out against, nail, prevent sliding, this is to be avoided steel pipe to directly act on the key that forms point load on the floor.1) with in Φ 48 * 3.5 fastener type pin hand steel pipes set up framed bent as the conversion layer structure formwork-support, adjustable bracketing is placed in the steel pipe support top end, is placed in 48 * 3.5 steel pipes in little on the adjustable bracketing again, what the fastener type steel pipe column bore is axial force.The load that acts on the falsework is big especially; Doing the problem that supports most critical with the steel tube fastener scaffold is to guarantee that collapse accident can not appear in the template support; Otherwise loss that causes and influence are greatly; Therefore, even under the three-dimensional spacing of framed bent all meets design requirement condition, still must take necessary additional safeguard measure.The edge member that utilizes the transformational structure zone is through frame column, and the shear wall transmission is unloaded and lost a part of load, and the intermediate portion is with steel pipe and pillar locking.
Highrise building beam-type transition layer amount of reinforcement is big, model is many; The conversion beam cross section is big, and reinforcement placement is intricate up and down for beam.Accurately setting-out is with blanking, rationally arrange that reinforcing bar is connected and colligation is particularly important properly.
In reinforcement detailing and the blanking construction; It should be noted that: the steel content of conversion crossbeam is big, and main muscle is long, arranges close; The post node area that intersects at two beams has up to a hundred main muscle of tens layers up and down in this " gathering "; Add waist muscle, post muscle etc., main muscle also must have been bent anchoring, and many muscle " are robbed the position ", and phenomenon is very outstanding.Any main muscle with regard to bit-errors, all can cause a large amount of doing over again.Therefore, turning over appearance and blanking exactly is the prerequisite of reinforcing bar smooth construction.
1) must understand fully design idea before the reinforcement detailing; Examine, be familiar with design document and relevant explanation; Grasp the pertinent regulations of current specifications.To combine reality and consider convenient construction when turning over kind.
2) the main muscle of general design conversion crossbeam has all been bent anchoring in the post node area, and difficulty of construction is big.Can resolve through consultation with designing unit, as: crossbeam to go up row's gluten most curved downwards and be anchored to more than the end muscle; End muscle next is arranged main muscle and depends on curved 25d on the post limit as far as possible, all the other main muscle all adopt the screw-thread steel write off to bend anchor, it is curved that negative muscle does not also rise, and all extends to have bent muscle, anchorage length meets the demands.Increased node space, for concrete perfusion with vibrate condition is provided.
3) the main muscle joint on beam top requires to be arranged in span centre 1/3 span length, and bottom master's muscle joint requires to be located near in bearing 1/3 span length.Because main muscle is many in the beam, during main muscle blanking, must consider and adjust the joint location of every reinforcing bar, stagger each other and satisfy the current specifications requirement with the welding point that guarantees main muscle.
4) for making things convenient for the installation in position of reinforcing bar, satisfy above-mentioned code requirement, must number by order in place all beam main tendons.
5) beam stirrup is big, will note during blanking avoiding joint to appear at the bending place of stirrup to the welding joint location.
Each position reinforcing bar connects in the construction, and should be noted that: reinforcing bar is of a great variety in the conversion layer, and diverse location reinforcing steel bar bear situation also is not quite similar, and therefore, different connected modes is adopted at each position comprehensively stressing conditions, difficulty of construction, economic benefit etc.
1) the main muscle of conversion layer crossbeam is a most important stress unit in the conversion layer, should adopt the most reliable and to the harmless connected mode of reinforcing bar, can adopt straight screw sleeve or cold extrusion method of attachment.
2) conversion layer girder waist muscle and stirrup, contact beam main tendon, slab muscle generally adopt flash.
3) conversion layer post reinforcing bar, the vertical distribution bar of shear wall should adopt electroslag pressure welding.
4) other stressed more less important positions can adopt colligation to connect like contact beam frame force rib and stirrup.
The bean column node reinforcing bar of conversion layer beam slab is intensive, will adjust the length and the position of the solid muscle of end reinforced anchor (bending) in the reinforcing bar binding process, reserves the sky that vibrates and asks, guarantees vibration compacting in the concreting process.Step D, one deck beam slab concrete is built under the conversion layer, and conversion layer beam slab concrete is built.One deck beam slab concrete is built and is routine operation under the conversion layer, is not described further.After the operation of one deck beam slab concrete vibrating is accomplished under the layer to be converted, can begin conversion layer beam slab concrete and build.
The conversion layer beam slab coagulation amount of building is big, the speed of perfusion piece, and total time of building is long, what time following notes again in the account temperature stress influence work progress:
1) concrete construction is arranged in as far as possible and carries out daytime, and guarantees that concrete conveying pays no attention to disconnected.Concreting answers layering to carry out, and every layer height is controlled at the 300-500 millimeter.1.5～2 hours every interlayer intervals.
2) to adopt machinery to vibrate be main to concrete vibration, and artificial cuttage is auxilliary.Insert vibrator and should adopt fast inserting to pull out slowly, time of vibration is as the criterion bleeding to occur, and the insertion point distance should be in vibrating head has 1.25 times of scopes of radius simultaneously.At the bean column node place, if reinforcing bar is too close, vibration can not be inserted, and then adopts the steel cuttage, beats with rubber hammer at the beam column side form, and vibrating with manual work remedies.
3) floorslab concrete is built, and except that Liang Chu adopts immersion vibrator, all the other are all adopted plate vibrator and vibrate back and forth along vertically building direction.Plate vibrator is according to mouthful in a row carrying out, and between row and row certain overlap joint should be arranged, and guarantees that concrete does not leak to shake, to reach its compactness.For guaranteeing floorslab concrete thickness; Except that the post joist, being marked with outside the bench mark; Also should add the portable height control member that forms with reinforcement fabrication, among Fig. 7 wooden a tree, used in making timber for boats be under the conversion layer first floor plate concrete height with prevent to support vertical rod and watered the control member in concrete, be used to control thickness of slab; To guarantee thickness of slab, meet design requirement.
4) the pumping construction overall process is except pressing routine operation, should note following some:
Stringing and tear pipe open and want strict coordinative construction order to stay with constuction joint to establish requirement: before the pipe pumping, strengthen the moistening pipe of force feed water and the pump housing, the gunnysack that will wet in case of necessity is covered on the pump line, the reduction concrete temperature; In the pumping process, have pump line to cooperate with chute, control pumping impact force avoids scratching the deep beam anchor rib; The control of concrete molding temperature.Molding temperature directly influences concrete center temperature rise value, Gu and the reduction molding temperature is one of conversion layer mass concrete construction important control content.
The beam of conversion layer beam slab, the plate matched moulds same period, primary concreting beam slab concrete is noted the indwelling of concrete construction joint and the reasonable setting in concrete initial setting time.Note the position of wall column joint bar when building, prevent blanking and vibrate to cause and displacement.Before the concrete initial set wall column joint bar position is checked, find that displacement deflection resets immediately.Concrete is strengthened vibrating of each position with vibrating spear when pumping is built, guarantee the closely knit of concrete vibrating.
Step e, after layer beam slab concrete strength to be converted reached 100%, one deck beam slab concrete strength had also reached 100% under the conversion layer.At this moment, the formwork-support of promptly dismountable conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.
The above is merely preferred embodiment of the present invention, does not limit the scope that the present invention implements with this, and the equivalence of doing according to technical scheme of the present invention and description changes and modification, all should belong to the scope that the present invention is contained.
Claims (1)
1. highrise building beam-type transition layer steel pipe supports the superimposed one-shot forming job practices of building, and the step that comprises has:
Steps A, confirm auxiliary girder steel of conversion layer and conversion layer next, two layers of beam slab add the scheme of reinforcing bar;
Step B sets up the formwork-support of the following two layers of beam slab of conversion layer, and the template of the following two layers of beam slab of shop conversion layer is made the bar construction of the following two layers of beam slab of conversion layer, and the following two layers of beam slab concrete of conversion layer are built;
Step C sets up the formwork-support of one deck beam slab under the conversion layer, and the template of one deck beam slab under the conversion layer of shop is made the bar construction of one deck beam slab under the conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of shop conversion layer beam slab, the bar construction of making conversion layer beam slab;
Step D, one deck beam slab concrete is built under the conversion layer, and conversion layer beam slab concrete is built;
Step e is removed the formwork-support of conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.
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| CN201110056082.8A CN102619331B (en) | 2011-03-08 | 2011-03-08 | Once molding construction method of beam-type conversion layer of high-rise building by steel pipe supporting and laminated pouring |
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| CN201110056082.8A CN102619331B (en) | 2011-03-08 | 2011-03-08 | Once molding construction method of beam-type conversion layer of high-rise building by steel pipe supporting and laminated pouring |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103015716A (en) * | 2012-11-28 | 2013-04-03 | 泰兴市第一建筑安装工程有限公司 | Construction method for ultra-wide section conversion beam steel engineering |
| CN103276894A (en) * | 2013-06-04 | 2013-09-04 | 河南国基建设集团有限公司 | Support system of large-cross-section girder transfer floor of hollow floor system and construction technology |
| CN103397778A (en) * | 2013-04-27 | 2013-11-20 | 瑞华建设集团有限公司 | Method for constructing high-rise commercial and residential building structure transfer floor |
| CN103526932A (en) * | 2013-10-24 | 2014-01-22 | 成军 | Section steel self-unloading construction method of high-rise building conversion beam |
| CN103526928A (en) * | 2013-09-22 | 2014-01-22 | 中国建筑第八工程局有限公司 | High-rise cantilever conversion spatial frame structure construction method |
| CN103866979A (en) * | 2014-02-27 | 2014-06-18 | 中天建设集团有限公司 | Construction method for conversion layer unloading type formwork system |
| CN104060760A (en) * | 2014-06-19 | 2014-09-24 | 浙江勤业建工集团有限公司 | Layered construction method for oversized concrete beam of structural transfer floor of high-rise building |
| CN107460948A (en) * | 2017-08-16 | 2017-12-12 | 长安大学 | The double-deck RC plate-type transfer floors and construction method of superstructure are poured after a kind of |
| CN109736847A (en) * | 2019-02-14 | 2019-05-10 | 中铁十一局集团有限公司 | Primary concreting concrete inverted arch and its construction method |
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