CN106088436A - BRT Lightweight core mould construction technology - Google Patents
BRT Lightweight core mould construction technology Download PDFInfo
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- CN106088436A CN106088436A CN201610405622.1A CN201610405622A CN106088436A CN 106088436 A CN106088436 A CN 106088436A CN 201610405622 A CN201610405622 A CN 201610405622A CN 106088436 A CN106088436 A CN 106088436A
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- floor
- mould
- ferrum
- concrete
- girt strip
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of BRT Lightweight core mould construction technology, comprise the following steps: (one) preparation of construction；(2) colligation floor floor iron and girt strip；(3) preheating embedding line and reserved sleeve pipe are laid；(4) anti-floating fixing point is set；(5) anti-floating of inspecting for acceptance point is arranged；(6) hollow box mould bottom cushion block is installed；(7) hollow box mould is installed；(8) ferrum on colligation floor；(9) ferrum cushion block is set；(10) erection construction sidewalk, erection concrete conveying pipe；(11) concealment acceptance；(12) concrete placings；(13) maintenance, form removal；(14) later stage processes.The construction technology of the present invention reduces the deadweight of plate face, it is ensured that the safety coefficient of support system；It is applicable to various span and the building of various load, is particularly well-suited to large span and big load, the multilamellar of large space and skyscraper.
Description
Technical field
The present invention relates to a kind of BRT Lightweight core mould construction technology.
Background technology
BRT Lightweight core mould close rib composite floor plate system, forms through casting concrete after mould in placing by certain rule
Cavity building roof.By the interior mould in the internal embedding lightweight of floor, reach, in the case of the computed altitude increasing floor, not increase
The deadweight of floor construction, thus it is finally reached minimizing number of steel bars, reduce concrete amount, reduce the purpose of construction costs.From
From the point of view of Flexural Strength, placing hollow box body and form cavity in cast-in-situ floor, the normal section of the plate in the horizontal, vertical direction of interior mould becomes
The bearing capacity in I-shaped cross section and the solid slab of equivalent are identical.
Summary of the invention
The technical problem to be solved is: provide a kind of BRT Lightweight core mould construction technology.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The BRT Lightweight core mould construction technology that the present invention provides, comprises the following steps:
(1) preparation of construction
(1) slab form has been propped up and has been checked and accepted by preliminary examination, and the Vierendeel girder reinforcing bar colligation of frame structure completes；
(2) reinforcing bar and case mould riding position line are played
According to designing and arranging case figure requirement, unwrapping wire on slab form, it is ensured that the position that follow-up girt strip reinforcing bar binding and case mould are installed
Accurately；According to axis, release vertically and horizontally girt strip control line, be i.e. to lay case mould position between girt strip；Unwrapping wire is at inner membrance for the second time
After casing installs, in hollow box body, unwrapping wire uses whiting to replace prepared Chinese ink, and to ensure, unwrapping wire is clear firm；
(2) colligation floor floor iron and girt strip
According to the position of snap the line in template, colligation floor floor iron and case mould limit girt strip successively；First according to tying up the method for beam along floor
Xia Tie lower floor muscle direction colligation floor girt strip, and lay same direction floor floor iron；Then, muscle direction, underfloor ferrum upper strata is laid
Girt strip on ferrum, be inserted in rib beam hoop reinforcement one by one, after stirrup has overlapped, wear the lower ferrum of girt strip and underfloor ferrum and colligation is firm；
(3) preheating embedding line and reserved sleeve pipe are laid
Each specialty preheating embedding line in floor along girt strip and is arranged in girt strip cross section, avoids case mould position；External diameter 15mm with
Under small pipe line be laid on case mould bottom, but less than one layer, must not intersect under case mould, in order to avoid padded case mould；
(4) anti-floating fixing point is set
After floor floor iron and girt strip reinforcing bar binding, anti-floating point can be started setting up；The anti-floating force path that anti-floating point is arranged
It is as follows: case mould buoyancy that------rib beam hoop reinforcement or iron wire connect---floor floor iron---anti-floating point iron wire---mould to ferrum on floor
Plate body system；Anti-floating point uses No. 14 iron wires, punches at floor floor iron upper strata muscle two side template with power drill (using Φ 4 drill bit),
Iron wire is tightened through template in formwork keel side, by floor floor iron upper strata muscle and template fixation；Fixing point is from floor week
While start to arrange to centre, spacing 1 meter in length and breadth, edge, post-cast strip also to be arranged；Rib beam hoop reinforcement to be made or drag hook hook on floor
Ferrum upper strata muscle, to ensure the effective force of anti-floating point；Otherwise, should again with No. 14 iron wires by ferrum upper strata muscle on floor and lower ferrum colligation
Tighten, be correspondingly arranged with lower ferrum anti-floating point, it is ensured that anti-floating effect；
(5) anti-floating of inspecting for acceptance point is arranged
After anti-floating point has set, carrying out anti-floating point special project middle inspection and check and accept, to ensure that anti-floating point arranges uniformly, position is accurate,
Fixation is reliable, meets anti-floating requirement；
(6) hollow box mould bottom cushion block is installed
Cushion block is set under hollow box mould, it is ensured that the concrete thickness of case mould bottom；Pad thickness case to be met mould bottom coagulation
The design thickness requirement of soil；Quantity is set, for the case mould of 700*700, only respectively arranges one piece, for 700* in case mould corner
The case mould of 400, places 2 pieces, and can guarantee that case mould bottom concrete thickness is as the criterion；Because casing is subject to mixed when casting concrete
The buoyancy of solidifying soil, thus the cushion block of lower box can also save need not；
(7) hollow box mould is installed
The handling of hollow box mould uses the uncovered steel reinforcement cage welded, and inside steel reinforcement cage, four limits and bottom surface multi-layer sheet are closed；Press
According to cloth case figure, put successively in each girt strip space, place smooth, all around align, align；Intensive to local pipeline,
The position that caliber is big, it is impossible to when placing thick case mould, the case mould of other specification can be used instead；After case mould is laid, it should be noted that finished product is protected
Protect, it is to avoid personnel frequently trample, destroy；Damaged case mould, should change during ferrum in colligation in time；
(8) ferrum on colligation floor
After hollow box mould has been laid, start ferrum on colligation floor；Now, on girt strip, ferrum colligation completes, in the most remaining girt strip
Between floor on ferrum；On floor, ferrum should be positioned at same layer with ferrum on girt strip, and firm with girt strip reinforcing bar binding；For ensureing anti-floating point
Effective, on floor on ferrum girt strip to be pressed under ferrum, otherwise should be separately provided ferrum anti-floating point corresponding with lower ferrum anti-floating point connect；
On floor after ferrum colligation, each hollow box mould top and floor add cushion block between ferrum, pushes down case mould, and ensure
Case mould top concrete thickness；
(9) ferrum cushion block is set
Upper ferrum method to set up and quantity are with bottom cushion block；
(10) erection construction sidewalk, erection concrete conveying pipe
Case calligraphy or painting model body has certain intensity, but frequently tramples and also easily cause damage, after especially adding top cushion block, and stress collection
In, fragile；In construction, application scaffold board sets up built on stilts builder's road, and convenient construction operator operate, pass through, and protect
Case mould and floor bar finished product；Concrete delivery pump pipe directly on floor bar, should can not set up short tube shelf or chock by frame
The riding positions such as side etc. are high by pump line frame, boom answer schedule ahead good, and boom application scaffold board and shelf frame are high, must not be straight
Connect and be pressed on case mould；Construction equipments etc. must not be placed on hollow box mould, and constructing operation personnel must not trample hollow box mould；
(11) concealment acceptance
After the operations such as reinforcing bar binding, case mould installation complete, tissue related personnel carry out three inspections and hidden inspect for acceptance, and emphasis is strengthened
The inspection that antagonism floating-point is arranged, after acceptance(check), enters concreting operation；
(12) concrete placings
Cast-in-place concrete hollow building roof structure pours with concrete, and its slump should be more slightly larger than solid plain superstructure, desirable 18 ~
20cm, and be the slump to cast in situs；Coarse aggregate size preferably selects less than 25mm；Case calligraphy or painting model body belongs to cement products,
Should first sprinkle water before concreting moistening (winter should not sprinkle water)；Concreting preferably uses pumping；Pour along floor span side
To from the beginning of side, order is carried out successively, and cloth is the most uniformly, it is to avoid concrete piles up too high damage case mould at same position；Vibrate
Rod vibrates along girt strip position successively along casting direction, should suitably strengthen vibrating time and a quantity of vibrating than solid superstructure, vibrate
Observing hollow box mould surrounding simultaneously, until no longer there being bubble to emerge, representing that case mould lower concrete is the most closely knit；Vibrating spear should be avoided
Directly touching hollow box mould；In casting process as bad in hollow box wear, it is necessary to process in time；The lightweights such as available nylon braided bag
It is tight that article fill in breakage closure, fills in article and exposes case mould surface, cause concrete slag inclusion after being careful not to make；
Using special strong concrete to pour, concrete includes the composition of following parts by weight: cement 100 parts, water
100-150 part, flyash 20-30 part, nemalite 22-31 part, basalt fibre 15-24 part, silicon bath soil 9-17 part, chlorination
Sodium 8-14 part, melamine cyanurate 5-13 part, water reducer 12-17 part.
Water reducer includes the component of following parts by weight: tert-butyl acrylate 25-30 part, melamine cyanurate salt 20-
30 parts, sodium hexameta phosphate 15-25 part, sulfamic acid sodium 10-17 part.
The preparation method of described strong concrete, comprises the following steps:
(1), first cement, water, flyash, nemalite stirring are made its mix homogeneously；
(2), the water reducer stirring of basalt fibre, silicon bath soil, sodium chloride and half parts by weight is made its mix homogeneously, then
Being added in the blending ingredients that step (1) obtains, stirring makes its mix homogeneously；
(3), the water reducer of melamine cyanurate and half parts by weight is added in the blending ingredients that step (2) obtains, stir
Mix and make its mix homogeneously, obtain strong concrete.
(13) maintenance, form removal
The maintenance of concrete is identical with solid superstructure with form removal, uses water seasoning summer, and winter can be (thick with Polypropylence Sheet and straw screen or mat
Degree is determined by thermodynamic metering) carry out covering and heat insulating maintenance；
(14) later stage processes
BRT Lightweight core mould form removal is complete, for preventing floor slab bottoms steel bar corrosion, need to be cut by 14# iron wire used by fixing core
Cut, antirust treatment；Construction method is: dig iron wire root to the 1cm degree of depth in plate, is then cut by iron wire, then brush antirust paint,
Floating with waterproof mortar again；
Processed by this operation, it is ensured that in floor, reinforcing bar is not because tie wire causes getting rusty, and affects project durability, from all
On solve the internal steel bar corrosion problem of floor.
Winter construction: winter construction hollow box mould is deposited and preferably hidden, when laying, should there be ice and snow foreign material surface and inside, no
Then must remove clean；Should not water on winter construction cast-in-situ hollow building roof case mould；Concreting covers guarantor after completing in time
Replenishing vital QI with drugs of warm nature protects；Floor is hung: hangs weight on floor and should meet design requirement；Sling point selects girt strip or floor solid section as far as possible
Position.
Beneficial effects of the present invention
1 economic aspect: to cast-in-place concrete hollow building roof structure and soap-free emulsion polymeization under the conditions of identical load (mobile load is 3.5KN/m2)
The economy of prestressed concrete slab structure two schemes is contrasted,
Situation is contrasted as follows after analyzing:
Hollow building cover cost: construction area * analysis unit price=4828.15 * 300.99 yuan /=1453224.87 yuan
Prestressed concrete slab cost: construction area * analysis unit price=4828.15 * 332.12 yuan /=1603525.18
Unit, saves the amount of money=1603525.18-1453224.87=150300.31 unit obvious economic.
2 secure contexts: BRT Lightweight core mould close rib composite floor plate system, reduce the deadweight of plate face, it is ensured that the peace of support system
Overall coefficient.
3 technical elements: reduce floor deadweight, improve the effect such as heat-insulating property, it is adaptable to various spans and various load
Building, is particularly well-suited to large span and big load, the multilamellar of large space and skyscraper.
4 mass aspects: this construction system uses closes cavity hole creating technology, it is suppressed that the transmission of floor noise up and down, gram
Take the interference of upper and lower floor noise, improve heat-proof quality simultaneously.
Detailed description of the invention
Embodiment 1
The BRT Lightweight core mould construction technology that the present embodiment provides, comprises the following steps:
(1) preparation of construction
(1) slab form has been propped up and has been checked and accepted by preliminary examination, and the Vierendeel girder reinforcing bar colligation of frame structure completes；
(2) reinforcing bar and case mould riding position line are played
According to designing and arranging case figure requirement, unwrapping wire on slab form, it is ensured that the position that follow-up girt strip reinforcing bar binding and case mould are installed
Accurately；According to axis, release vertically and horizontally girt strip control line, be i.e. to lay case mould position between girt strip；Unwrapping wire is at inner membrance for the second time
After casing installs, in hollow box body, unwrapping wire uses whiting to replace prepared Chinese ink, and to ensure, unwrapping wire is clear firm；
(2) colligation floor floor iron and girt strip
According to the position of snap the line in template, colligation floor floor iron and case mould limit girt strip successively；First according to tying up the method for beam along floor
Xia Tie lower floor muscle direction colligation floor girt strip, and lay same direction floor floor iron；Then, muscle direction, underfloor ferrum upper strata is laid
Girt strip on ferrum, be inserted in rib beam hoop reinforcement one by one, after stirrup has overlapped, wear the lower ferrum of girt strip and underfloor ferrum and colligation is firm；
(3) preheating embedding line and reserved sleeve pipe are laid
Each specialty preheating embedding line in floor along girt strip and is arranged in girt strip cross section, avoids case mould position；External diameter 15mm with
Under small pipe line be laid on case mould bottom, but less than one layer, must not intersect under case mould, in order to avoid padded case mould；
(4) anti-floating fixing point is set
After floor floor iron and girt strip reinforcing bar binding, anti-floating point can be started setting up；The anti-floating force path that anti-floating point is arranged
It is as follows: case mould buoyancy that------rib beam hoop reinforcement or iron wire connect---floor floor iron---anti-floating point iron wire---mould to ferrum on floor
Plate body system；Anti-floating point uses No. 14 iron wires, punches at floor floor iron upper strata muscle two side template with power drill (using Φ 4 drill bit),
Iron wire is tightened through template in formwork keel side, by floor floor iron upper strata muscle and template fixation；Fixing point is from floor week
While start to arrange to centre, spacing 1 meter in length and breadth, edge, post-cast strip also to be arranged；Rib beam hoop reinforcement to be made or drag hook hook on floor
Ferrum upper strata muscle, to ensure the effective force of anti-floating point；Otherwise, should again with No. 14 iron wires by ferrum upper strata muscle on floor and lower ferrum colligation
Tighten, be correspondingly arranged with lower ferrum anti-floating point, it is ensured that anti-floating effect；
(5) anti-floating of inspecting for acceptance point is arranged
After anti-floating point has set, carrying out anti-floating point special project middle inspection and check and accept, to ensure that anti-floating point arranges uniformly, position is accurate,
Fixation is reliable, meets anti-floating requirement；
(6) hollow box mould bottom cushion block is installed
Cushion block is set under hollow box mould, it is ensured that the concrete thickness of case mould bottom；Pad thickness case to be met mould bottom coagulation
The design thickness requirement of soil；Quantity is set, for the case mould of 700*700, only respectively arranges one piece, for 700* in case mould corner
The case mould of 400, places 2 pieces, and can guarantee that case mould bottom concrete thickness is as the criterion；Because casing is subject to mixed when casting concrete
The buoyancy of solidifying soil, thus the cushion block of lower box can also save need not；
(7) hollow box mould is installed
The handling of hollow box mould uses the uncovered steel reinforcement cage welded, and inside steel reinforcement cage, four limits and bottom surface multi-layer sheet are closed；Press
According to cloth case figure, put successively in each girt strip space, place smooth, all around align, align；Intensive to local pipeline,
The position that caliber is big, it is impossible to when placing thick case mould, the case mould of other specification can be used instead；After case mould is laid, it should be noted that finished product is protected
Protect, it is to avoid personnel frequently trample, destroy；Damaged case mould, should change during ferrum in colligation in time；
(8) ferrum on colligation floor
After hollow box mould has been laid, start ferrum on colligation floor；Now, on girt strip, ferrum colligation completes, in the most remaining girt strip
Between floor on ferrum；On floor, ferrum should be positioned at same layer with ferrum on girt strip, and firm with girt strip reinforcing bar binding；For ensureing anti-floating point
Effective, on floor on ferrum girt strip to be pressed under ferrum, otherwise should be separately provided ferrum anti-floating point corresponding with lower ferrum anti-floating point connect；
On floor after ferrum colligation, each hollow box mould top and floor add cushion block between ferrum, pushes down case mould, and ensure
Case mould top concrete thickness；
(9) ferrum cushion block is set
Upper ferrum method to set up and quantity are with bottom cushion block；
(10) erection construction sidewalk, erection concrete conveying pipe
Case calligraphy or painting model body has certain intensity, but frequently tramples and also easily cause damage, after especially adding top cushion block, and stress collection
In, fragile；In construction, application scaffold board sets up built on stilts builder's road, and convenient construction operator operate, pass through, and protect
Case mould and floor bar finished product；Concrete delivery pump pipe directly on floor bar, should can not set up short tube shelf or chock by frame
The riding positions such as side etc. are high by pump line frame, boom answer schedule ahead good, and boom application scaffold board and shelf frame are high, must not be straight
Connect and be pressed on case mould；Construction equipments etc. must not be placed on hollow box mould, and constructing operation personnel must not trample hollow box mould；
(11) concealment acceptance
After the operations such as reinforcing bar binding, case mould installation complete, tissue related personnel carry out three inspections and hidden inspect for acceptance, and emphasis is strengthened
The inspection that antagonism floating-point is arranged, after acceptance(check), enters concreting operation；
(12) concrete placings
Cast-in-place concrete hollow building roof structure pours with concrete, and its slump should be more slightly larger than solid plain superstructure, desirable 18 ~
20cm, and be the slump to cast in situs；Coarse aggregate size preferably selects less than 25mm；Case calligraphy or painting model body belongs to cement products,
Should first sprinkle water before concreting moistening (winter should not sprinkle water)；Concreting preferably uses pumping；Pour along floor span side
To from the beginning of side, order is carried out successively, and cloth is the most uniformly, it is to avoid concrete piles up too high damage case mould at same position；Vibrate
Rod vibrates along girt strip position successively along casting direction, should suitably strengthen vibrating time and a quantity of vibrating than solid superstructure, vibrate
Observing hollow box mould surrounding simultaneously, until no longer there being bubble to emerge, representing that case mould lower concrete is the most closely knit；Vibrating spear should be avoided
Directly touching hollow box mould；In casting process as bad in hollow box wear, it is necessary to process in time；The lightweights such as available nylon braided bag
It is tight that article fill in breakage closure, fills in article and exposes case mould surface, cause concrete slag inclusion after being careful not to make；
Using special strong concrete to pour, concrete includes the composition of following parts by weight: cement 100 parts, water
150 parts, 30 parts of flyash, nemalite 31 parts, basalt fibre 24 parts, 17 parts of silicon bath soil, 14 parts of sodium chloride, cyanuric acid three
Poly cyanamid 13 parts, water reducer 17 parts.
Water reducer includes the component of following parts by weight: tert-butyl acrylate 30 parts, melamine cyanurate salt 30 parts, six
Polymeric sodium metaphosphate. 25 parts, 17 parts of sulfamic acid sodium.
The preparation method of described strong concrete, comprises the following steps:
(1), first cement, water, flyash, nemalite stirring are made its mix homogeneously；
(2), the water reducer stirring of basalt fibre, silicon bath soil, sodium chloride and half parts by weight is made its mix homogeneously, then
Being added in the blending ingredients that step (1) obtains, stirring makes its mix homogeneously；
(3), the water reducer of melamine cyanurate and half parts by weight is added in the blending ingredients that step (2) obtains, stir
Mix and make its mix homogeneously, obtain strong concrete；
(13) maintenance, form removal
The maintenance of concrete is identical with solid superstructure with form removal, uses water seasoning summer, and winter can be (thick with Polypropylence Sheet and straw screen or mat
Degree is determined by thermodynamic metering) carry out covering and heat insulating maintenance；
(14) later stage processes
BRT Lightweight core mould form removal is complete, for preventing floor slab bottoms steel bar corrosion, need to be cut by 14# iron wire used by fixing core
Cut, antirust treatment；Construction method is: dig iron wire root to the 1cm degree of depth in plate, is then cut by iron wire, then brush antirust paint,
Floating with waterproof mortar again；
Processed by this operation, it is ensured that in floor, reinforcing bar is not because tie wire causes getting rusty, and affects project durability, from all
On solve the internal steel bar corrosion problem of floor.
Winter construction: winter construction hollow box mould is deposited and preferably hidden, when laying, should there be ice and snow foreign material surface and inside, no
Then must remove clean；Should not water on winter construction cast-in-situ hollow building roof case mould；Concreting covers guarantor after completing in time
Replenishing vital QI with drugs of warm nature protects；Floor is hung: hangs weight on floor and should meet design requirement；Sling point selects girt strip or floor solid section as far as possible
Position.
Claims (1)
1.BRT Lightweight core mould construction technology, it is characterised in that comprise the following steps:
(1) preparation of construction
(1) slab form has been propped up and has been checked and accepted by preliminary examination, and the Vierendeel girder reinforcing bar colligation of frame structure completes；
(2) reinforcing bar and case mould riding position line are played
According to designing and arranging case figure requirement, unwrapping wire on slab form, it is ensured that the position that follow-up girt strip reinforcing bar binding and case mould are installed
Accurately；According to axis, release vertically and horizontally girt strip control line, be i.e. to lay case mould position between girt strip；Unwrapping wire is at inner membrance for the second time
After casing installs, in hollow box body, unwrapping wire uses whiting to replace prepared Chinese ink, and to ensure, unwrapping wire is clear firm；
(2) colligation floor floor iron and girt strip
According to the position of snap the line in template, colligation floor floor iron and case mould limit girt strip successively；First according to tying up the method for beam along floor
Xia Tie lower floor muscle direction colligation floor girt strip, and lay same direction floor floor iron；Then, muscle direction, underfloor ferrum upper strata is laid
Girt strip on ferrum, be inserted in rib beam hoop reinforcement one by one, after stirrup has overlapped, wear the lower ferrum of girt strip and underfloor ferrum and colligation is firm；
(3) preheating embedding line and reserved sleeve pipe are laid
Each specialty preheating embedding line in floor along girt strip and is arranged in girt strip cross section, avoids case mould position；External diameter 15mm with
Under small pipe line be laid on case mould bottom, but less than one layer, must not intersect under case mould, in order to avoid padded case mould；
(4) anti-floating fixing point is set
After floor floor iron and girt strip reinforcing bar binding, anti-floating point can be started setting up；The anti-floating force path that anti-floating point is arranged
It is as follows: case mould buoyancy that------rib beam hoop reinforcement or iron wire connect---floor floor iron---anti-floating point iron wire---mould to ferrum on floor
Plate body system；Anti-floating point uses No. 14 iron wires, punches at floor floor iron upper strata muscle two side template with power drill (using Φ 4 drill bit),
Iron wire is tightened through template in formwork keel side, by floor floor iron upper strata muscle and template fixation；Fixing point is from floor week
While start to arrange to centre, spacing 1 meter in length and breadth, edge, post-cast strip also to be arranged；Rib beam hoop reinforcement to be made or drag hook hook on floor
Ferrum upper strata muscle, to ensure the effective force of anti-floating point；Otherwise, should again with No. 14 iron wires by ferrum upper strata muscle on floor and lower ferrum colligation
Tighten, be correspondingly arranged with lower ferrum anti-floating point, it is ensured that anti-floating effect；
(5) anti-floating of inspecting for acceptance point is arranged
After anti-floating point has set, carrying out anti-floating point special project middle inspection and check and accept, to ensure that anti-floating point arranges uniformly, position is accurate,
Fixation is reliable, meets anti-floating requirement；
(6) hollow box mould bottom cushion block is installed
Cushion block is set under hollow box mould, it is ensured that the concrete thickness of case mould bottom；Pad thickness case to be met mould bottom coagulation
The design thickness requirement of soil；Quantity is set, for the case mould of 700*700, only respectively arranges one piece, for 700* in case mould corner
The case mould of 400, places 2 pieces, and can guarantee that case mould bottom concrete thickness is as the criterion；Because casing is subject to mixed when casting concrete
The buoyancy of solidifying soil, thus the cushion block of lower box can also save need not；
(7) hollow box mould is installed
The handling of hollow box mould uses the uncovered steel reinforcement cage welded, and inside steel reinforcement cage, four limits and bottom surface multi-layer sheet are closed；Press
According to cloth case figure, put successively in each girt strip space, place smooth, all around align, align；Intensive to local pipeline,
The position that caliber is big, it is impossible to when placing thick case mould, the case mould of other specification can be used instead；After case mould is laid, it should be noted that finished product is protected
Protect, it is to avoid personnel frequently trample, destroy；Damaged case mould, should change during ferrum in colligation in time；
(8) ferrum on colligation floor
After hollow box mould has been laid, start ferrum on colligation floor；Now, on girt strip, ferrum colligation completes, in the most remaining girt strip
Between floor on ferrum；On floor, ferrum should be positioned at same layer with ferrum on girt strip, and firm with girt strip reinforcing bar binding；For ensureing anti-floating point
Effective, on floor on ferrum girt strip to be pressed under ferrum, otherwise should be separately provided ferrum anti-floating point corresponding with lower ferrum anti-floating point connect；
On floor after ferrum colligation, each hollow box mould top and floor add cushion block between ferrum, pushes down case mould, and ensure
Case mould top concrete thickness；
(9) ferrum cushion block is set
Upper ferrum method to set up and quantity are with bottom cushion block；
(10) erection construction sidewalk, erection concrete conveying pipe
In construction, setting up built on stilts builder's road with scaffold board, convenient construction operator operate, pass through, and guard box Mo He building
Slab muscle finished product；The not direct frame of concrete delivery pump pipe, on floor bar, sets up short tube shelf or chock side by pump line frame
Height, boom riding position answers schedule ahead good, and boom application scaffold board and shelf frame are high, must not directly bear against on case mould；
Construction equipment must not be placed on hollow box mould, and constructing operation personnel must not trample hollow box mould；
(11) concealment acceptance
After reinforcing bar binding, case mould installation procedure complete, tissue related personnel carry out three inspections and hidden inspect for acceptance, acceptance(check)
After, enter concreting operation；
(12) concrete placings
Cast-in-place concrete hollow building roof structure pours uses concrete, and its slump takes 18-20cm, and is the slump to cast in situs
Degree；Coarse aggregate size is less than 25mm；Case mould is first sprinkled water moistening before concreting；Concreting uses pumping；Pour
Along floor span direction from the beginning of side, order is carried out successively, and cloth is uniform, it is to avoid concrete piles up too high damage case at same position
Mould；Vibrating spear vibrates along girt strip position successively along casting direction, should suitably strengthen vibrating time than solid superstructure and count with vibrating
Amount, vibrates and observes hollow box mould surrounding simultaneously, until no longer there being bubble to emerge, represents that case mould lower concrete is the most closely knit；Vibrate
Rod should be avoided directly touching hollow box mould；In casting process as bad in hollow box wear, process in time；Fill in nylon braided bag
Breakage closure is tight, fills in article and exposes case mould surface, cause concrete slag inclusion after being careful not to make；
Using special strong concrete to pour, concrete includes the composition of following parts by weight: cement 100 parts, water
100-150 part, flyash 20-30 part, nemalite 22-31 part, basalt fibre 15-24 part, silicon bath soil 9-17 part, chlorination
Sodium 8-14 part, melamine cyanurate 5-13 part, water reducer 12-17 part；
Water reducer includes the component of following parts by weight: tert-butyl acrylate 25-30 part, melamine cyanurate salt 20-30 part,
Sodium hexameta phosphate 15-25 part, sulfamic acid sodium 10-17 part；
(13) maintenance, form removal
The maintenance of concrete uses water seasoning summer, winter Polypropylence Sheet and straw screen or mat carry out covering and heat insulating maintenance；
(14) later stage processes
BRT Lightweight core mould form removal is complete, for preventing floor slab bottoms steel bar corrosion, need to be cut by 14# iron wire used by fixing core
Cut, antirust treatment；Construction method is: dig iron wire root to the 1cm degree of depth in plate, is then cut by iron wire, then brush antirust paint,
Floating with waterproof mortar again.
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| CN108756037A (en) * | 2018-06-01 | 2018-11-06 | 平煤神马建工集团有限公司 | A kind of mounting structure of the whole anti-floating of GBF square chests cassette ceiling |
| CN110080454A (en) * | 2019-05-31 | 2019-08-02 | 中联世纪建设集团有限公司 | LPM light filling body Construction of Cast-in-situ Concrete Hollow |
| CN110258883A (en) * | 2019-06-24 | 2019-09-20 | 南通大学 | A kind of construction method of hollow floor BDF steel mesh film filling cabinet |
| CN111622407A (en) * | 2020-05-28 | 2020-09-04 | 中国二十冶集团有限公司 | Construction method of large-cavity hollow floor slab |
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