CN101725202A - Superimposed pouring procedure of high-rise building transfer floor beam plate - Google Patents
Superimposed pouring procedure of high-rise building transfer floor beam plate Download PDFInfo
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- CN101725202A CN101725202A CN200810201032A CN200810201032A CN101725202A CN 101725202 A CN101725202 A CN 101725202A CN 200810201032 A CN200810201032 A CN 200810201032A CN 200810201032 A CN200810201032 A CN 200810201032A CN 101725202 A CN101725202 A CN 101725202A
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Abstract
The invention relates to construction of high-rise buildings and a superimposed pouring procedure of a high-rise building transfer floor beam plate, which comprises the following steps: pouring column concrete and wall concrete at the lower part of the transfer floor to a beam bottom; setting up a beam plate bottom die of the transfer floor and installing the bottom die; binding bottom-layer horizontal steel mesh reinforcement of the first layer of concrete of a transfer floor plate and surface course hogging moment steel mesh reinforcement of the first layer of concrete; installing a side form of the first layer of concrete; installing a shear-resisting key groove die plate; bonding additionally arranged vertical shear reinforcement between every two layers of transfer floor beam plates; carrying out pouring, hydrating, heat preservation, maintenance and surface treatment on the first layer of concrete; bonding constructional steel bar of the second layer of concrete of the transfer floor beam plates; installing the side form of the second layer of concrete; bonding shear wall joint bars at the upper structure of the transfer floor; disassembling the bottom die and the support when strength of the first layer of concrete reaches the design strength; carrying out pouring, hydrating, heat preservation and maintenance on the second layer of concrete. With the method of the invention adopted, construction cost can be reduced, construction quality can be improved and construction period can be shortened.
Description
Technical field
The present invention relates to the construction construction of highrise building, relate in particular to a kind of high-rise building transfer floor job practices.
Background technology
Most highrise buildings, general upper floor is dwelling house, hotel etc., requires that the standard width of a room in an old-style house is little, structure wall is many, and the bottom annex mostly is public places such as commerce, entertainment, requires that the space is big, body of wall is few.Therefore the form of structure of upper floor and bottom annex is variant, needs between upper floor and bottom annex conversion layer to be set.Because conversion layer can be regarded the basis of upper floor as, it is stressed bigger, and conversion layer thickness is thicker during structure design, arrangement of reinforcement is closeer, and its thickness reaches 1.5～2.5 meters usually, so the full hall support scaffolding load of conversion layer beam slab bed die is very big.During conventional the construction, conversion layer beam slab thickness direction is integrated poured, change layer working load of beam slab bed die in order to bear, all do not remove from the full hall of the bed die support scaffolding to all floors of conversion layer more than the basement bottom board, and require the vertical rod of floor up and down to align as far as possible, load disperses downwards to transmit by all floors, passes to ground up to basement bottom board.
The drawback of conventional job practices is:
1., since the full hall support scaffolding of following all floor bottom moulds of conversion layer need wait until conversion layer construct and reach intensity after could remove, so need a large amount of template backing material of preparation, the rates of material or a purchase commodity are too big.
2., conversion layer beam slab thickness direction is integrated poured, is unfavorable for the heat radiation of prevention of mass concrete, need take special cooling measure, controls badly, occurs the crack easily.
3., the full hall support scaffolding of basement floor bottom mould removes evening time, influence that basement is interspersed in advance to carry out the architectural decoration operation, incurs loss through delay total duration.
Summary of the invention
The present invention is intended to solve the above-mentioned defective of prior art, and a kind of superimposed pouring procedure of high-rise building transfer floor beam plate is provided.The present invention effectively reduces construction cost, improves construction quality, shortens total duration.
The present invention is achieved in that
A kind of superimposed pouring procedure of high-rise building transfer floor beam plate, it comprises the following steps:
A, conversion layer lower post, wall concreting are at the bottom of the beam;
B, conversion layer beam slab bed die bearing support are set up with conversion layer beam slab bed die and are installed;
C, conversion layer beam steel, the conversion concrete bottom horizontal mesh reinforcement of laminate first floor and the colligation of the concrete surface layer negative reinforcement of first floor net;
D, the concrete side form of conversion layer beam slab first floor install;
E, shearing resistance keyway formwork erection;
The vertical shear reinforcement colligation of setting up between f, conversion layer beam slab layer and the layer;
G, the concreting of conversion layer beam slab first floor;
H, the maintenance of conversion layer beam slab first floor concrete moisture-heat preservation;
I, conversion layer beam slab first floor concrete surface are handled;
J, distributing bar (temperature reinforcement) colligation of conversion layer beam slab second layer concrete and surfacing steel bar colligation thereof;
K, the concrete side form of the conversion layer beam slab second layer install;
L, the colligation of conversion layer superstructure shearwall joint bar;
M, conversion layer beam slab first floor concrete strength are removed bed die and support after reaching design strength;
N, the concreting of the conversion layer beam slab second layer;
O, the maintenance of conversion layer beam slab second layer concrete moisture-heat preservation.
Described superimposed pouring procedure of high-rise building transfer floor beam plate, described step b comprises: formwork bracing system is only considered to support conversion layer beam slab first floor and is built concrete deadweight and working load, its load is by the some floor plates supportings below the conversion layer, determine the supporting floor number of plies by calculating, the full hall scaffold of these floors is not removed earlier; Determine to participate in bearing vertical pole ' s span, the cross bar step pitch of full hall scaffold that conversion layer beam slab first floor is built the floor of concrete deadweight and working load by calculating.
Described superimposed pouring procedure of high-rise building transfer floor beam plate, among described step c and the f: watering the preceding reinforcement construction of first floor concrete is in proper order: the top is set up interim steel pipe shelf, guarantee for a person given by a shopkeeper's sheath cushion block, overlaps stirrup, divides shop lower floor reinforcing bar, layering to hang upper reinforcement, wears the waist muscle, is added the vertical shear reinforcement of setting up when hanging muscle, dismounting steel pipe shelf, the bottom muscle of wearing bed board, the plate face negative reinforcement of setting up when wearing the cast of branch multilayer, the cast of installation branch multilayer at the bottom of the beam.
Described superimposed pouring procedure of high-rise building transfer floor beam plate; among described step g, h, n and the o; its concrete is built by Mass Concrete Construction; adopt the technical measures of thermometric, concrete surface insulation, inside concrete temperature control; guarantee that temperature difference between inside and outside concrete is no more than 25 ℃, does not produce structure penetrability crack.
Described superimposed pouring procedure of high-rise building transfer floor beam plate, in step c and f, a laminate face negative reinforcement need be set up in the plate surface that need formerly build, builds the concrete load with the opposing secondary, avoids the concrete cracking simultaneously; Simultaneously layer with layer between need set up shear reinforcement, in superposed surfaces, keep at a certain distance away and set up vertical reinforcement, and be embedded in length in the new and old concrete surface layer is rebar full length half.
Described superimposed pouring procedure of high-rise building transfer floor beam plate also comprises among the described step e:
Increase the shearing resistance groove: utilize and stay the mode of establishing groove to increase shear strength in advance, promptly build conversion layer edge, forward position and stay in advance and set out wide groove and concrete bonding surface roughening is handled at concrete.
Described superimposed pouring procedure of high-rise building transfer floor beam plate, concrete bonding surface roughening is handled and is comprised in the described step I:
Artificial cutter hair promptly uses the new and old concrete bonding surface of awl and chiso-mallet hair; And dark beam is inner because stirrup designs the artificial bristle of intensive place's employing wire brush;
Water under high pressure dashes, and treats concrete final set, washes away new and old concrete bonding surface with water under high pressure after reaching certain intensity, and the coarse-fine aggregate on old concrete surface is exposed, and forms rough superposed surfaces;
Water under high pressure dashes and adds retarding agent, builds the back at the first floor concrete and sprays retarding agent, delays the concrete final setting time, so that in time take high pressure water washing, forms rough superposed surfaces.
Support system of the present invention only considers to bear the concrete deadweight and the working load of first floor, can reduce load that the bottom steel pipe supports, reduce a large amount of circulation materials, reduces construction costs;
Concreting in lifts can be alleviated concrete in mass heat of hydration height, the excessive adverse effect to the control crack of thermal stresses, has guaranteed the Mass Concrete Construction quality.
The full hall support scaffolding of basement floor bottom mould can early be removed, and basement can intert in advance and carries out the architectural decoration operation, can shorten total duration.
The specific embodiment
A kind of superimposed pouring procedure of high-rise building transfer floor beam plate, it is implemented according to following order:
、→→、→→→→→→→ ( ) →→→→→。
During concrete enforcement, note following point:
(1), template supports and sets up
Formwork bracing system only considers to support deadweight of first floor concrete and working load, and how many floor plate supportings its load specifically needs by the some floor plates supportings below the conversion layer, and are definite by calculating, and the full hall scaffold of these floors is not removed earlier.Participation is born the parameters such as vertical pole ' s span, cross bar step pitch of full hall scaffold of the floor of conversion layer first floor concrete deadweight and working load and also will be determined by calculating.
(2), conversion layer beam reinforced steel bar
The reinforcement construction that waters before the first floor concrete is in proper order: the vertical shear reinforcement that the bottom muscle that upper reinforcement → wear waist muscle → additional hangs muscle etc. → dismountings steel pipe shelf → wear bed board → wear bed board face negative reinforcement (the structure muscle of setting up when branchs multilayer is poured into a mould) → set up when installation branch multilayer is poured into a mould is hung in interim steel pipe shelf → guarantee for a person given by a shopkeeper's sheath cushion block → cover stirrup → minute shop lower floor reinforcing bar → layering is set up in the top at the bottom of the beam.
The installation after having watered the first floor concrete, before the cast of second layer concrete of the top layer reinforcing bar of conversion laminate.
Because the conversion layer beam slab adopts superimposed casting, be that the conversion layer beam slab will divide 2 layers even multilayer cast, in order to guarantee conversion layer beam slab globality, strengthen the caking property of new and old concrete, in reinforcement construction, to take following measure: 1., layer and the layer between need set up shear reinforcement, set up the vertical reinforcement of long 1m Φ 16 in superposed surfaces, spacing is 1m, and the length that is embedded in the new and old concrete surface layer is 0.5m; 2., the plate surface of formerly building need set up a laminate face negative reinforcement, arrangement of reinforcement is mainly resisted secondary and is built the concrete load, avoids the concrete cracking simultaneously, can play temperature steel effect in the slab.
(3), the conversion layer concrete is built
Though conversion layer beam slab concrete has divided the multilayer pouring; but every layer thickness is still thicker; its concrete still need be by Mass Concrete Construction; adopt thermometric, insulation (concrete surface), temperature control technical measures such as (inside concretes); guarantee that temperature difference between inside and outside concrete is no more than 25 ℃, does not produce structure penetrability crack.
Superimposed casting divides 2 layers even multilayer cast, in order to guarantee conversion layer beam slab globality, strengthens the caking property of new and old concrete, will take following measure in the concrete construction:
Keep a public place clean to tying up reinforcing bar when 1., the first floor concrete is built
Plate top mat sheet was not laid when the first floor concrete was built, but beam steel colligation finish, need the measure of keeping a public place clean of stiffening girder reinforcing bar, feed opening must be away from Liang Qu when requiring the concrete pouring, concrete adopts the formation of flowing naturally of vibrating head guiding concrete as far as possible in the beam; Carrier pipe drops on the beam zone and adopts template and Polypropylence Sheet protection to isolate, and in time manually beam steel is carried out cleaning after building concrete.
2., new and old concrete bonding surface is handled
A, increase shearing resistance groove: utilize and stay the mode of establishing groove to increase shear strength in advance, promptly build conversion layer edge, forward position at concrete and stay the groove that sets out the dark 60mm of wide 1m in advance, groove is far away apart from edge 1m, apart from beam 0.5m.
B, concrete bonding surface roughening is handled: a, an artificial cutter hair method, promptly use the new and old concrete bonding surface of awl and chiso-mallet hair; And dark beam is inner because the stirrup design is intensive, and manually-operated inconvenience can be adopted the artificial bristle of wire brush.B, high pressure water jetting are treated concrete final set, are washed away new and old concrete bonding surface with water under high pressure after reaching certain intensity, and the coarse-fine aggregate on old concrete surface is exposed, and form rough superposed surfaces.C, water under high pressure dash and add the retarding agent method, build the back at the first floor concrete and spray retarding agent, delay the concrete final setting time, so that in time take high pressure water washing, form rough superposed surfaces.
Claims (7)
1. a superimposed pouring procedure of high-rise building transfer floor beam plate is characterized in that it comprises the following steps:
A, conversion layer lower post, wall concreting are at the bottom of the beam;
B, conversion layer beam slab bed die bearing support are set up with conversion layer beam slab bed die and are installed;
C, conversion layer beam steel, the conversion concrete bottom horizontal mesh reinforcement of laminate first floor and the colligation of the concrete surface layer negative reinforcement of first floor net;
D, the concrete side form of conversion layer beam slab first floor install;
E, shearing resistance keyway formwork erection;
The vertical shear reinforcement colligation of setting up between f, conversion layer beam slab layer and the layer;
G, the concreting of conversion layer beam slab first floor;
H, the maintenance of conversion layer beam slab first floor concrete moisture-heat preservation;
I, conversion layer beam slab first floor concrete surface are handled;
J, distributing bar (temperature reinforcement) colligation of conversion layer beam slab second layer concrete and surfacing steel bar colligation thereof;
K, the concrete side form of the conversion layer beam slab second layer install;
L, the colligation of conversion layer superstructure shearwall joint bar;
M, conversion layer beam slab first floor concrete strength are removed bed die and support after reaching design strength;
N, the concreting of the conversion layer beam slab second layer;
O, the maintenance of conversion layer beam slab second layer concrete moisture-heat preservation.
2. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1, it is characterized in that, described step b comprises: formwork bracing system is only considered to support conversion layer beam slab first floor and is built concrete deadweight and working load, its load is by the some floor plates supportings below the conversion layer, determine the supporting floor number of plies by calculating, the full hall scaffold of these floors is not removed earlier; Determine to participate in bearing vertical pole ' s span, the cross bar step pitch of full hall scaffold that conversion layer beam slab first floor is built the floor of concrete deadweight and working load by calculating.
3. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1; it is characterized in that among described step c and the f: watering the preceding reinforcement construction of first floor concrete is in proper order: the top is set up interim steel pipe shelf, guarantee for a person given by a shopkeeper's sheath cushion block, overlaps stirrup, divides shop lower floor reinforcing bar, layering to hang upper reinforcement, wears the waist muscle, is added the vertical shear reinforcement of setting up when hanging muscle, dismounting steel pipe shelf, the bottom muscle of wearing bed board, the plate face negative reinforcement of setting up when wearing the cast of branch multilayer, the cast of installation branch multilayer at the bottom of the beam.
4. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1; it is characterized in that; among described step g, h, n and the o; its concrete is built by Mass Concrete Construction; adopt the technical measures of thermometric, concrete surface insulation, inside concrete temperature control; guarantee that temperature difference between inside and outside concrete is no more than 25 ℃, does not produce structure penetrability crack.
5. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1 is characterized in that, in step c and f, a laminate face negative reinforcement need be set up in the plate surface that need formerly build, builds the concrete load with the opposing secondary, avoids the concrete cracking simultaneously; Simultaneously between layer and layer, need set up shear reinforcement, across setting up long vertical reinforcement, and be embedded in half that length in the new and old concrete surface layer is total length in the superposed surfaces centre.
6. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1 is characterized in that, also comprises among the described step e:
Increase the shearing resistance groove: utilize and stay the mode of establishing groove to increase shear strength in advance, promptly build conversion layer edge, forward position and stay the groove that sets out in advance, and concrete bonding surface roughening is handled at concrete.
7. superimposed pouring procedure of high-rise building transfer floor beam plate according to claim 1 is characterized in that, concrete bonding surface roughening is handled and comprised in the described step I:
Artificial cutter hair promptly uses the new and old concrete bonding surface of awl and chiso-mallet hair; And dark beam is inner because stirrup designs the artificial bristle of intensive place's employing wire brush;
Water under high pressure dashes, and treats concrete final set, washes away new and old concrete bonding surface with water under high pressure after reaching certain intensity, and the coarse-fine aggregate on old concrete surface is exposed, and forms rough superposed surfaces;
Water under high pressure dashes and adds retarding agent, builds the back at the first floor concrete and sprays retarding agent, delays the concrete final setting time, so that in time take high pressure water washing, forms rough superposed surfaces.
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| CN103821359A (en) * | 2014-02-28 | 2014-05-28 | 中天建设集团有限公司 | Large-cross-section concrete beam layered casting construction method |
| CN104405137A (en) * | 2014-11-25 | 2015-03-11 | 东南大学 | Optimizing method for support in composite member construction |
| CN104405137B (en) * | 2014-11-25 | 2016-08-17 | 东南大学 | A kind of superposed member work progress supports optimization 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 |
| CN108118784A (en) * | 2016-11-30 | 2018-06-05 | 中国二十冶集团有限公司 | Concrete frame structure profiled beam overlay technique construction method |
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| CN110056004A (en) * | 2019-04-25 | 2019-07-26 | 中建四局第四建筑工程有限公司 | A kind of construction method of the secondary upper cover ultra-thick plate of subway |
| CN113266035A (en) * | 2021-06-25 | 2021-08-17 | 中国电建集团贵州电力设计研究院有限公司 | Construction method for upper structure of steam turbine base |
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