CN103397778A - Method for constructing high-rise commercial and residential building structure transfer floor - Google Patents
Method for constructing high-rise commercial and residential building structure transfer floor Download PDFInfo
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- CN103397778A CN103397778A CN201310158723XA CN201310158723A CN103397778A CN 103397778 A CN103397778 A CN 103397778A CN 201310158723X A CN201310158723X A CN 201310158723XA CN 201310158723 A CN201310158723 A CN 201310158723A CN 103397778 A CN103397778 A CN 103397778A
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Abstract
The invention discloses a method for constructing a high-rise commercial and residential building structural transfer floor. The method comprises the follow steps that locating paying-off and rib binding of wall columns are conducted; formwork erecting construction is conducted on the wall columns and beam slabs; concrete pouring is conducted on the wall columns; reinforcing steel bar binding and water and electricity reserving and embedding construction are conducted on a structural transfer layer girder and a floor slab; concrete pouring is conducted on the lower portion of the central axis of the structural transfer layer girder; when the lower portion of the central axis of the structural transfer layer girder is maintained to a certain extent, reinforcing steel bar binding, and water and electricity reserving and embedding construction are conducted on the floor slab; the upper portion of the central axis of the girder, other beam columns and the floor slab are poured through concrete; concrete curing is conducted on the upper portion of the central axis of the girder, the other beam columns and the floor slab till a formwork hander is dismantled. The method for constructing the high-rise commercial and residential building structural transfer floor, relative cost can be effectively reduced, construction difficulty is low and efficiency is high.
Description
Technical field
The present invention relates to a kind of the realm of building construction, relate in particular to a kind of high-storey business structural transition layer job practices.
Background technology
For the high-storey business engineering, some layers of bottoms annex is generally as market, and span and space requirement are larger, and upper floor is as residential building.As identical with the bottom annex as top house post net or shear wall span district, be very uneconomic in design.For solving the techno-economic question of high-storey business engineering, often between bottom annex and top dwelling layer, establish structural transition layer.Other high building project, run into equally or Similar Problems also has the situation that structural transition layer is set.
The structural transition layer of high-storey business engineering, due to its special structure function, the cross section of the bearing beam of general design and bulky, the reinforcing bar of configuration is large and intensive.Thereby it collects the difficulty of construction such as high-supported formwork, chutable concrete, fine concrete, concrete in mass, reinforcement installation in together, in work progress, must treat cautiously.
Summary of the invention
The purpose of this invention is to provide a kind of high-storey business structural transition layer job practices.
To achieve these goals, the present invention puies forward a kind of high-storey business structural transition layer job practices, comprises the steps:
A, location unwrapping wire, wall column are pricked muscle;
B, described wall column and beam slab carry out formwork construction;
C, described wall column is carried out to concreting;
D, structural transition layer crossbeam and floor carry out reinforcing bar binding, the construction of water power set aside pre-embedded;
E, described structural transition layer crossbeam natural axis are with bottom concreting;
F, treat that the following concrete curing of described structural transition layer crossbeam natural axis reaches some strength, carry out the floor steel bar colligation, water power is reserved and Embedment Construction;
More than g, described crossbeam natural axis, together with other beam columns and floorslab concrete, build;
H, described crossbeam natural axis above with other beam columns and floorslab concrete maintenance until stripping support.
For the intensive described structural transition layer crossbeam of reinforcing bar, reinforcing bar adopts flashlight weld, electric slag pressure welding or is threaded, and can alleviate the dense degree of reinforcing bar, reduces difficulty of construction.
Described structural transition layer crossbeam concrete, on the basis of building at twice, adopts the casting method of layering ladder tumbling-type at every turn, 30 centimetres every layer.
In step b, the mold method of described formwork comprises: crossbeam natural axis bottom each layer integral formwork support method, Load Transfer formwork method and add and join the carriage formwork method.
In the step of ligation of described structure conversion crossbeam reinforcing bar, along being parallel to described structure conversion crossbeam direction, set up temporary operating platform, make under described flat upper surface and described structure conversion crossbeam along alignment, in described structure conversion crossbeam both sides, on described operating platform face, one deck scaffold is set up in relevant position, and both sides operation width is not less than 0.8 meter.
The technology for binding flow process of described structure conversion crossbeam reinforcing bar comprises: wear little stirrup, wear large stirrup, the colligation gluten, wear end muscle colligation, wear waist muscle and lacing wire colligation, padded the topping cushion block, heavy beam muscle.
In described structural transition layer, concrete slump used is 14～16 centimetres, and the less ballast grain sizes of concrete used employing, is generally the rubble of 5～31.5 millimeters particle diameters.
Compared with prior art, due to high-storey business structural transition layer job practices of the present invention, can effectively reduce and relate to cost and difficulty of construction is less, efficiency is high.
The specific embodiment
The structural transition layer construction of high-storey business engineering or other high building project, applicable the present invention, in construction work or other engineering, for the construction of the intensive structure crossbeam of reinforcing bar, also can be with reference to the present invention.
In the high-storey business engineering, described structure conversion crossbeam is generally all larger, at twice during concreting, constuction joint is stayed described crossbeam natural axis place, formerly build the following concrete of described crossbeam natural axis, and after reaching some strength, then build the above concrete of described crossbeam natural axis.While building for the second time, height is built in the lump less than beam and the plate surface concrete of 1 meter.The job practices of so building at twice, can alleviate the formwork load, for its formwork provides certain facility.
In one embodiment, because the story height that will build is higher, so reinforcement ratio comparatively dense of described structural transition layer, therefore to reinforcing bar, adopt flashlight weld, electric slag pressure welding or be threaded, and need not overlap or arc welding as far as possible, can alleviate the dense degree of reinforcing bar, reduce difficulty of construction.
Because reinforcing bar is intensive, therefore in the process of construction, need larger concrete slump, adopt and add flyash and water reducing agent, namely the method such as concrete " two mixing " technology solves.
Described structure conversion crossbeam concrete is on the basis of building at twice, each casting method that all adopts layering ladder tumbling-type, 30 centimetres every layer, so be conducive to the heat radiation in described structure conversion crossbeam concreting process and guarantee the concrete quality of vibrating.
In described formwork construction:
The mold method of the described structural transition layer of high-storey business engineering, have bottom each layer integral formwork support method, Load Transfer formwork method and add and join carriage formwork method etc.
Particularly, bottom each layer integral formwork support method, namely at each following layer of described structural transition layer, namely from the first floor, have basement from basement bottom board, during formwork, consider in advance the size of working load amount of the described structural transition layer on top, below each layer concrete build after not stripping and support, after described structural transition layer is constructed and reached age strength, then remove in the lump.
Particularly, the Load Transfer formwork method, the deadweight and the working load that are about to described structural transition layer pass to following some floor plates by support system, with the designer, confer and increase the lower floor plate thickness in case of necessity, improve the bearing capacity of floor.
Particularly, add and join the carriage formwork method and often together with the Load Transfer formwork method, use, as embedded steel tube or anchor ear in the pillar of having constructed in bottom, with shaped steel, make construction bracket, protect and help formwork, to reduce the number of plies of Load Transfer.
Deadweight and the working load of described structural transition layer are larger, must select rational mold method according to the actual conditions of engineering, the general intensive ф 48*3.5mm steel pipe frame of full hall that adopts also adopts than half step distance, to guarantee formwork, enough intensity, rigidity and stability is arranged.Each layer integral formwork support method needs a large amount of template and backing material, has reduced the number of turnover of template and support, the lower situation of the more and described structural transition layer of the template that applicable job site can be used and backing material.
Described structural transition layer crossbeam is generally taked the method for two-step pouring, and the method for minority small cross sections beam one-time-concreting is also arranged, and during the formwork designing and calculating, need consider that both are in work progress, the difference of described structural transition layer crossbeam internal force.But no matter adopt which kind of casting method, in the Load Analysis of formwork system design, all can not only consider concrete deadweight and working load first, and should consider the load of the concrete overall process of two-step pouring.
In case history, described structural transition layer template is adopted to the thick veneer of 18mm, adopt the 80*80mm lumps of wood as the formwork secondary joist, adopt the two steel pipes of ф 48*3.5mm as main joist, the soffit formwork of described beam slab can be selected two-ply, the therebetween layer of plastic film, in order to be incubated the maintenance with moisturizing to the concrete after building.
In the colligation of described structure conversion crossbeam reinforcing bar, generally, after bed die installs, along being parallel to the crossbeam direction of principal axis, set up temporary operating platform, make under flat upper surface and beam along alignment.Relevant position is set up one deck scaffold again on the operating platform face of both sides, crossbeam position, and both sides operation width is not less than 0.8m.
Described structure conversion crossbeam reinforcing bar flow of installation: wear little stirrup → wear large stirrup → colligation gluten → wear end muscle colligation → wear waist muscle and lacing wire colligation → padded topping cushion block → heavy beam muscle.
Special construction function due to described structure conversion crossbeam, the beam column reinforcing bar is intensive, when reinforcing bar is installed, generally all can encounter crossbeam gluten and end muscle and enter the post crotch and partly pacify and can not load, because reinforcing bar is close, have influence on the difficulties such as post concrete ramming, pre-buried last layer sleeper and shear force wall reinforcing steel bar.To this, the reinforcing bar of described structure conversion crossbeam connects, and does not generally adopt the arc welding overlap joint, more can not be with iron wire colligation overlap joint, and so not only uneconomical, and also the dense degree and concrete the watering that more increase reinforcing bar are smash difficulty of construction.
ф 22 and following beam steel are adopted to flashlight weld, and the post muscle adopts electric slag pressure welding, and ф 25 and the employing of above beam column reinforcing bar are threaded.Floor and large beam sides can adopt mortar cover cushion block or plastic cushion, at the bottom of crossbeam, because reinforcing bar weight is large, adopt granite flag cushion block or plastic cushion.When making the mortar cover cushion block, before cement final set, wear iron wire to utilize colligation to fix, conscientious maintenance cement mortar bedding block after making.
Present high building project construction, generally all adopt commercial concrete, and its vertical transport generally all adopts concrete pump, for meeting pumpability, more than concrete slump needs 8cm.And, because described structural transition layer arrangement of reinforcement is intensive, not only need larger concrete slump, and be generally 14～16cm or surpass 16cm, and can only adopt less ballast grain sizes, be generally the rubble of 5～31.5mm particle diameter.The spy is close as reinforcing bar, can only be with 5～25mm or less Guamishi as concrete coarse aggregate.
Described structure conversion crossbeam concrete should adopt the casting method of layering ladder tumbling-type, and every layer of 30cm, be conducive to like this heat radiation in concreting process and guarantee the concrete quality of vibrating.Every from one end to the other side layering of crossbeam is back built.When the beam body of crossbeam is longer, as span, surpass 4m, when the bottom was poured into apart from the about L/5 of the other end from an end, wherein L was the girder span total length, should in time turn around to turn to and build, to avoid reducing concrete strength at beam column junction water accumulation mud.In the stratified watering process, when vibrating the last layer concrete, should insert down 3-5cm in one deck.
In the construction of described structural transition layer; material therefor is substantially the same with monolithic reinforced concrete structure; it is mainly reinforcing bar; comprise welding rod, iron wire, connecting thread, rubble or Guamishi commercial concrete; the slump is generally 14～16cm, adds flyash and water reducing agent, mortar cover cushion block, granite flag cushion block or plastic cushion, also has the turnover materials such as veneer, the lumps of wood, steel pipe support etc.
The facility that high-storey business project subject structure construction uses, comprise pillar crane, concrete pump, material distributing machine, reinforcement fabrication and welding facility, template system peace facility and concrete vibrating facility, all equally is applicable to the construction of its structural transition layer.In the construction of described structural transition layer, preferably be equipped with flash butt welder and electroslag pressure welding machine, in addition, should increase temperature measuring device.
On the labour, comprise carpenter, bar bender, concreter, facility operative employee etc., also the same with high-storey business project subject structure construction, but during the construction of structural transition layer, bar bender's labour intensity can be larger.
Above disclosed is only the preferred embodiments of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the present patent application the scope of the claims, still belong to the scope that the present invention is contained.
Claims (7)
1. a high-storey business structural transition layer job practices, is characterized in that, comprises the steps:
A, location unwrapping wire, wall column are pricked muscle;
B, described wall column and beam slab carry out formwork construction;
C, described wall column is carried out to concreting;
D, structural transition layer crossbeam and floor carry out reinforcing bar binding, the construction of water power set aside pre-embedded;
E, the following concreting of described structural transition layer crossbeam natural axis;
F, treat that described structural transition layer crossbeam natural axis reaches some strength with the bottom concrete curing, carry out the floor steel bar colligation, water power is reserved and Embedment Construction;
More than g, described crossbeam natural axis, together with other beam columns and floorslab concrete, build;
H, described crossbeam natural axis above with other beam columns and floorslab concrete maintenance until stripping support.
2. high-storey business structural transition layer job practices as claimed in claim 1 is characterized in that: for the intensive described structural transition layer crossbeam of reinforcing bar, reinforcing bar adopts flashlight weld, electric slag pressure welding or is threaded.
3. high-storey business structural transition layer job practices as claimed in claim 1, it is characterized in that: described structural transition layer crossbeam concrete, on the basis of building at twice, adopts the casting method of layering ladder tumbling-type at every turn, 30 centimetres every layer.
4. high-storey business structural transition layer job practices as claimed in claim 1, it is characterized in that: in step b, the mold method of described formwork comprises: crossbeam natural axis bottom each layer integral formwork support method, Load Transfer formwork method and add and join the carriage formwork method.
5. high-storey business structural transition layer job practices as claimed in claim 1, it is characterized in that: in the step of ligation of described structure conversion crossbeam reinforcing bar, along being parallel to described structure conversion crossbeam direction, set up temporary operating platform, make under described flat upper surface and described structure conversion crossbeam along alignment, in described structure conversion crossbeam both sides, on described operating platform face, one deck scaffold is set up in relevant position, and both sides operation width is not less than 0.8 meter.
6. high-storey business structural transition layer job practices as claimed in claim 1 is characterized in that: the technology for binding flow process of described structure conversion crossbeam reinforcing bar comprises: wear little stirrup, wear large stirrup, the colligation gluten, wear end muscle colligation, wear waist muscle and lacing wire colligation, padded the topping cushion block, heavy beam muscle.
7. high-storey business structural transition layer job practices as claimed in claim 1, it is characterized in that: in described structural transition layer, concrete slump used is 14～16 centimetres, and the less ballast grain sizes of concrete used employing, is generally the rubble of 5～31.5 millimeters particle diameters.
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| CN201310158723XA CN103397778A (en) | 2013-04-27 | 2013-04-27 | Method for constructing high-rise commercial and residential building structure transfer floor |
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| CN201310158723XA CN103397778A (en) | 2013-04-27 | 2013-04-27 | Method for constructing high-rise commercial and residential building structure transfer floor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105178490A (en) * | 2015-08-07 | 2015-12-23 | 北京城建北方建设有限责任公司 | Double-layer step-by-step laminated construction method of ultrahigh and ultrathick prestressed concrete floor |
| CN106522551A (en) * | 2016-11-18 | 2017-03-22 | 重庆建工住宅建设有限公司 | Steel fiber self-compacting concrete construction method for conversion layer |
| CN108643341A (en) * | 2018-05-22 | 2018-10-12 | 中冶建工集团有限公司 | The construction method of high-rise building box-structure conversion layer |
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| JPH11141134A (en) * | 1997-09-03 | 1999-05-25 | Asutec:Kk | Beam rib reinforcing cage, fitting for beam reinforcing bar, and assembling method of beam reinforcing bar |
| CN102619331A (en) * | 2011-03-08 | 2012-08-01 | 青光绪 | 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN105178490A (en) * | 2015-08-07 | 2015-12-23 | 北京城建北方建设有限责任公司 | Double-layer step-by-step laminated construction method of ultrahigh and ultrathick prestressed concrete floor |
| CN106522551A (en) * | 2016-11-18 | 2017-03-22 | 重庆建工住宅建设有限公司 | Steel fiber self-compacting concrete construction method for conversion layer |
| CN108643341A (en) * | 2018-05-22 | 2018-10-12 | 中冶建工集团有限公司 | The construction method of high-rise building box-structure conversion layer |
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Application publication date: 20131120 |