CN102619331B - 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 PDF

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Publication number
CN102619331B
CN102619331B CN201110056082.8A CN201110056082A CN102619331B CN 102619331 B CN102619331 B CN 102619331B CN 201110056082 A CN201110056082 A CN 201110056082A CN 102619331 B CN102619331 B CN 102619331B
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conversion layer
slab
plate
construction
template
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CN201110056082.8A
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CN102619331A (en
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青光绪
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青光绪
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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

The superimposed one-shot forming construction method of building of transfer beam of tall building steel pipe support

Technical field

The present invention relates to a kind of conversion layer construction method of highrise building.

Background technology

Arrange because different construction level in highrise building are used the different spatial division of functional requirement, requiring has different form of structure, at the handing-over position of two kinds of structures, transition structure is set, and it is exactly conversion layer.The beam slab cross section of beam-type transition layer is large, and from great, difficulty of construction is large.At present in engineering for beam-type transition layer construction conventionalloading TRANSFER METHOD multilayer formwork, these two kinds of beam-type transition layer shuttering supporting schemes of coincidence Pouring formwork.By Load Transfer Method multilayer formwork, need to all remain into bottom surface after conversion layer concrete builds to the formwork-support of conversion layer beam slab, takies a large amount of shuttering supporting materials, and engineering cost is high.Coincidence Pouring, need to build conversion layer concrete and point complete for 2-3 time, first builds lower beam, after concrete strength reaches 100%, then builds middle part beam and top beam.In construction, exist the duration to grow, beam slab workmanship is affected to the problems such as larger.

Summary of the invention

The present invention aims to provide the superimposed one-shot forming construction method of building of a kind of transfer beam of tall building steel pipe support, and it can reduce shuttering supporting material reduction of erection time, guarantee beam slab workmanship.

Technical scheme of the present invention is: the superimposed one-shot forming construction method of building of transfer beam of tall building steel pipe support, and the step comprising has:

Steps A, determine the 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 lower two layers of beam slab of conversion layer, and the template of the lower two layers of beam slab of paving conversion layer is made the bar construction of the lower two layers of beam slab of conversion layer, and the lower two layers of beam slab concrete of conversion layer are built;

Step C, sets up the formwork-support of one deck beam slab under conversion layer, and the template of one deck beam slab under paving conversion layer is made the bar construction of one deck beam slab under conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of paving conversion layer beam slab, the bar construction of making conversion layer beam slab;

Step D, under conversion layer, one deck beam slab concrete is built, and conversion layer beam slab concrete is built;

Step e, removes the formwork-support of conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.

The superimposed one-shot forming construction method of building of transfer beam of tall building steel pipe support of the present invention, by add steel reinforced conversion layer next, the intensity of two layers of Vierendeel girder, use auxiliary girder steel that the major part of the deadweight of conversion layer beam slab and construction load is unloaded to lower two layers of Vierendeel girder; In construction, retain the formwork-support of one deck beam slab under conversion layer, the deadweight of one deck beam slab under conversion layer and construction load are unloaded on the lower two layers of Vierendeel girder of conversion layer by them.The present invention carries out co-bearing unloading and processes, and need from bottom, not implement multilayer shuttering supporting, and the deadweight of conversion layer beam slab and working load are all carried by the lower two layers of Vierendeel girder of conversion layer.Must not do other complex technology processing, simple to operate, convenient construction operation, is easy to quality control, saves a large amount of backing materials.Under conversion layer of the present invention, one deck beam slab concrete is built with conversion layer beam slab concrete and is built continuously and carry out, and has greatly shortened the duration; Particularly conversion layer beam slab does not need point to build 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.

Brief description of the drawings

Fig. 1 is the superimposed main construction process schematic diagram of building one-shot forming construction method of transfer beam of tall building steel pipe support of the present invention.

Fig. 2 is the braced structures schematic diagram that has the corresponding Liang Chu of lower one deck under conversion layer beam.

Fig. 3 is the braced structures schematic diagram without the corresponding Liang Chu of lower one deck under conversion layer beam.

Fig. 4 is a kind of structural representation of auxiliary girder steel.

Detailed description of the invention

The superimposed main construction process of building one-shot forming construction method of transfer beam of tall building steel pipe support of the present invention, as shown in Figure 1:

Steps A, determine the 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 considering wind load and seismic load, it is larger that its load effect embodies sectional dimension in the beam column of bottom, and arrangement of reinforcement is more, and supporting capacity is higher.While construction in bottom, because upper load, construction vibrations load and most wind load are not yet applied in structure, structure bottom beam column has very large supporting capacity deposit.When 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 Partial frame load bearing beam scarce capacity, can increase the arrangement of reinforcement of associated frame members beam; Make the deadweight of conversion layer beam slab and working load by conversion layer next, two layers of Vierendeel girder and supporting system thereof bear and pass and be subject to bottom beam column to basis.Conversion layer pattern board supporting frame each be horizontal brace, bridging, the bar of sweeping the floor for vertical rod, unloads by mechanics transfer principle.The weight of conversion layer beam slab 2 (comprise on frame beam for transferring layer 21 and frame beam for transferring layer 21 floor 22) and construction dynamic loading are by conversion layer pattern board supporting frame going down.The weight of one deck beam slab 1 under conversion layer (comprise under conversion layer under one deck Vierendeel girder 11 and conversion layer the floor 12 on one deck Vierendeel girder 11) and construction dynamic loading are by one deck pattern board supporting frame going down under conversion layer.Have for frame beam for transferring layer Vierendeel girder 11 places that under conversion layer, one deck is corresponding for 21 times, by 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 transfers the load to the Vierendeel girder of one deck under conversion layer, please refer to Fig. 2.For one deck under the conversion layer under frame beam for transferring layer 21 without associated frame members Liang11Chu, by the bracing frame in template 3, auxiliary girder steel 6(steel I-beam or steel channel beam and their support column are set for 4 times) transfer the load under conversion layer on the Vierendeel girder of two layers, please refer to Fig. 3.

Step B, sets up the formwork-support of the lower two layers of beam slab of conversion layer by such scheme, the template of the lower two layers of beam slab of paving conversion layer is made the bar construction of the lower two layers of beam slab of conversion layer, and the lower 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 conversion layer by such scheme, the template of one deck beam slab under paving conversion layer is made the bar construction of one deck beam slab under conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of paving conversion layer beam slab, the bar construction of making conversion layer beam slab.After the lower 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 conversion layer, the template of one deck beam slab under paving conversion layer, the bar construction of one deck beam slab under 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 arrange steel column and are fixed on the lower two layers of Vierendeel girder of conversion layer and column, to the load of conversion layer beam slab is delivered on the lower two layers of Vierendeel girder of conversion layer and column at auxiliary girder steel 6 two ends.On the steel column at auxiliary girder steel 6 two ends, end bearing place arranges steel plate cushion block 7, avoids auxiliary girder steel 6 stress deformations to cross senior general's load and is passed under conversion layer on first floor plate, in order to avoid cause floor because of stressed cracking.Please refer to Fig. 4,61, the girder steel of auxiliary girder steel 6 welds with tension rib (12 millimeters of reinforcing bars of Φ), with the stability that ensures that it is overall.If girder steel 61 adopts channel-section steel, put more energy into muscle 63 or stiffening rib must be set as calculated.

While setting up formwork-support, all hounds are by being less than or equal to 45° angle setting, array pitch is vertically 0.6 meter along cylinder, at the bottom of beam, hound is with the stupefied coordination mutually of outer steel of beam bottom mother plate, spacing is 400 millimeters, and at the bottom of its upper end extends template and with the mould of beam, outer steel is stupefied is interlockingly connected, and makes two fastener resisting slippings and move insurance, the reserved interior groove of setting the short muscle in position of lower fulcrum principal post face of hound, the lower fulcrum that descends row's hound is most the post root of place floor.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 with the full hall of floor frame disjunctor simultaneously simultaneously, must ensure to set up before crossbeam cage of reinforcement is in place complete, with guarantee diagonal support synchronize with framed bent under beam stressed, to strengthen globality and the stability of diagonal support.

In the construction of vertical rod and the bar of sweeping the floor, should be noted that: the upper end of vertical rod be directly interlockingly connected respectively with interior stupefied, outer stupefied at the bottom of beam (outer stupefied be close to interior stupefied below), move insurance thereby form pair fastener resisting slippings.The lower end of vertical rod is supported on the steel cushion block arranging on the elongated plank of laying on flooring.Under beam, framed bent is divided into the bar of sweeping the floor, and twice size cross bar is established in centre, framed bent both sides at the bottom of beam, and horizontally set diagonal brace, longitudinally arranges two limb bridgings, framed bent under beam and the full hall of floor frame is linked as to entirety, to increase the space stiffness of framed bent simultaneously.

In the construction of steel pipe support, should be noted that: in support system, must notice checking whether timber wedge holds out against, nail, anti-slip, this is to be avoided steel pipe to directly act on the key that forms point load on floor.

1) with in Φ 48 × 3.5 fastener type steel pipe scaffoldings set up framed bent as conversion layer structure formwork-support, adjustable bracketing is placed in steel pipe support top, then 48 × 3.5 steel pipes in little are placed on adjustable bracketing, what fastener type steel pipe column bore is axial force.Act on load on falsework large especially, the problem of making support most critical of steel tube fastener scaffold is to guarantee that collapse accident can not appear in shuttering supporting, otherwise the loss causing and impact are greatly, therefore, even if all meet design requirement under condition in the three-dimensional spacing of framed bent, still must take necessary additional safeguard measure.Utilize the edge member in transformational structure region by frame column, shear wall transmission is unloaded and is lost a part of load, steel pipe and pillar locking for intermediate portion.

Transfer beam of tall building amount of reinforcement is large, model is many; Conversion beam cross section is large, and the upper and lower reinforcement placement of beam is intricate.Accurate settingout be connected with blanking, the good reinforcing bar of reasonable arrangement and colligation particularly important.

In reinforcement detailing and blanking construction, it should be noted that: the steel content of conversion crossbeam is large, main muscle is long, arrange close, have up and down up to a hundred main muscle of tens layers in this " gathering " in the crossing post node area of two beams, add waist muscle, post muscle etc., main muscle also must bend up anchoring, and many muscle " are robbed 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, turn over exactly the prerequisite that sample and blanking are reinforcing bar smooth construction.

1) before reinforcement detailing, must understand fully design idea; Audit, be familiar with design document and relevant explanation; Grasp the pertinent regulations of current specifications.While turning over sample, to and consider convenient construction in conjunction with reality.

2) the main muscle of general design conversion crossbeam all bends up anchoring in post node area, and difficulty of construction is large.Can resolve through consultation with designing unit, as: crossbeam go up most row's gluten downwards curved and be anchored to end muscle more than; The main muscle of next row of end muscle is as far as possible by curved 25d on post limit, and all the other main muscle all adopt the curved anchor of screw-thread steel write off, and it is curved that negative muscle does not also rise, and all extends to bend up muscle, and anchorage length meets the demands.Increase 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 the main muscle joint in bottom requires to be located near in bearing 1/3 span length.Because main muscle in beam is many, when main muscle blanking, must consider and adjust the joint location of every reinforcing bar, to ensure that the welding point of main muscle mutually staggers and meets current specifications requirement.

4) for convenience of the installation in position of reinforcing bar, meet above-mentioned code requirement, must be numbered by order in place all beam main tendons.

5) beam stirrup is large, when blanking, will note Welded Joints position, avoids joint to appear at the bending place of stirrup.

In the reinforcing bar connection construction of each position, should be noted that: in conversion layer, reinforcing bar is of a great variety, diverse location reinforcing steel bar bear situation is also not quite similar, and therefore, each position comprehensively stressing conditions, difficulty of construction, economic benefit etc. adopts different connected modes.

1) the main muscle of conversion layer crossbeam is most important stress unit in conversion layer, should adopt the most reliably 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 Butt Welding.

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 as contacted beam frame force rib and stirrup.

The bean column node reinforcing bar of conversion layer beam slab is intensive, will adjust length and the position of the solid muscle of end reinforced anchor (curved) in reinforcing bar binding process, reserves the sky that vibrates and asks, guarantees vibration compacting in concreting process.

Step D, under conversion layer, one deck beam slab concrete is built, and conversion layer beam slab concrete is built.Under conversion layer, one deck beam slab concrete is built as routine operation, is not described further.After the lower one deck beam slab concrete vibrating operation of layer to be converted completes, can start conversion layer beam slab concrete and build.

The conversion layer beam slab coagulation amount of building is large, speed of perfusion piece, total time of building is long, consider again affecting in work progress of thermal stresses note following some:

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 300-500 millimeter.1.5~2 hours every interlayer intervals.

2) concrete vibrating adopts machinery to vibrate is main, and artificial cuttage is auxiliary.Insert vibrator and should adopt fast inserting to pull out slowly, time of vibration is as the criterion there is bleeding, and while insertion point is apart from should be within the scope of vibrating head has 1.25 times of radiuses.At bean column node place, if reinforcing bar is too close, vibration can not be inserted, and adopts steel cuttage, beats with rubber hammer at beam column side form, makes up with manually vibrating.

3) floor concrete casting, except Liang Chu adopts immersion vibrator, all the other are all adopted plate vibrator and vibrate back and forth along vertically building direction.Plate vibrator in a row carries out according to mouth, and should have certain overlap joint between row and row, guarantees that concrete does not leak and shakes, to reach its compactness.For ensureing floorslab concrete thickness, except being marked with outside bench mark post joist, also should add the portable height control member forming with reinforcement fabrication, for example make under conversion layer first floor plate concrete height and prevent that supported rod erecting from being watered the control member in concrete with wooden a tree, used in making timber for boats, be used for controlling thickness of slab, to ensure thickness of slab, meet design requirement.

4) pumping construction overall process is except operating routinely, should note following some:

Stringing and tear pipe open and want strict coordinative construction order and setting-up of construction joint requirement: before pipe pumping, strengthen the moistening pipe of force feed water and the pump housing, the gunnysack that will wet is if desired covered on pump line, reduction concrete temperature; In pumping procedure, there is pump line to coordinate with chute, control pumping impact force, avoid perturbing deep beam anchor rib; The control of concrete molding temperature.Molding temperature directly affects concrete center temperature rise value, Gu and reduction molding temperature is one of important Control the content of shifted layer big bulk concrete.

The beam of conversion layer beam slab, the plate matched moulds same period, primary concreting beam slab concrete, notes the indwelling of concrete construction joint and the reasonable setting in concrete initial setting time.While building, note the position of wall column joint bar, prevent from blanking and vibrate causing and displacement.Before concrete initial set, wall column joint bar position is checked, find that displacement deflection resets immediately.Concrete, when pumping is built, is strengthened vibrating of each position with vibrating spear, guarantees the closely knit of concrete vibrating.

Step e, after layer beam slab concrete strength to be converted reaches 100%, under conversion layer, one deck beam slab concrete strength has also reached 100%.Now, i.e. the formwork-support of dismountable conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.

The above, be only preferred embodiment of the present invention, do not limit scope of the invention process with this, and the equivalence of doing according to technical scheme of the present invention and description changes and modifies, and all should belong to the scope that the present invention is contained.

Claims (1)

1. the superimposed one-shot forming construction method of building of transfer beam of tall building steel pipe support, the step comprising has:
Steps A, determine the 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 lower two layers of beam slab of conversion layer, and the template of the lower two layers of beam slab of paving conversion layer is made the bar construction of the lower two layers of beam slab of conversion layer, and the lower two layers of beam slab concrete of conversion layer are built;
Step C, sets up the formwork-support of one deck beam slab under conversion layer, and the template of one deck beam slab under paving conversion layer is made the bar construction of one deck beam slab under conversion layer; Set up the auxiliary girder steel of conversion layer, set up the formwork-support of conversion layer beam slab, the template of paving conversion layer beam slab, the bar construction of making conversion layer beam slab;
Step D, under conversion layer, one deck beam slab concrete is built, and conversion layer beam slab concrete is built;
Step e, removes the formwork-support of conversion layer beam slab, auxiliary girder steel, remove conversion layer next, the formwork-support of two layers of beam slab.
CN201110056082.8A 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 CN102619331B (en)

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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
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
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
CN103526928B (en) * 2013-09-22 2017-02-22 中国建筑第八工程局有限公司 High-rise cantilever conversion spatial frame structure construction method
CN103526932B (en) * 2013-10-24 2015-04-22 浩嘉恒业建设发展有限公司 Section steel self-unloading construction method of high-rise building conversion beam
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
CN104060760B (en) * 2014-06-19 2016-09-07 浙江勤业建工集团有限公司 High Rise Building Transfer Floor Structure concrete super large beam construction in layer method
CN107460948B (en) * 2017-08-16 2019-09-13 长安大学 The double-deck RC plate-type transfer floor and construction method of superstructure are poured after a kind of

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JPH10325173A (en) * 1997-05-27 1998-12-08 Kobayashi Jun Construction method of beam, beam formwork device, and cap for side plate
CN201292572Y (en) * 2008-11-19 2009-08-19 江苏省江建集团有限公司 Late poured band aerial conversion layer
CN101761231A (en) * 2009-12-31 2010-06-30 青建集团股份公司 Supporting structure of beam type conversion layer template and method for strengthening substructure
CN101818570B (en) * 2010-03-23 2011-06-15 南通宏华建筑安装有限公司 Method for constructing girder structure conversion layer of high-rise building
CN101914990B (en) * 2010-07-28 2012-07-25 重庆建工第二建设有限公司 Beam-type transition layer cast-in-situ crossbeam construction formwork supporting system

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