CN106150001B - A kind of fabricated assembly overall stair construction method - Google Patents
A kind of fabricated assembly overall stair construction method Download PDFInfo
- Publication number
- CN106150001B CN106150001B CN201510208578.0A CN201510208578A CN106150001B CN 106150001 B CN106150001 B CN 106150001B CN 201510208578 A CN201510208578 A CN 201510208578A CN 106150001 B CN106150001 B CN 106150001B
- Authority
- CN
- China
- Prior art keywords
- concrete
- staircase component
- component
- staircase
- lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of fabricated assembly overall stair construction method, specific steps include the construction after mold construction, the construction of staircase component component part, stair preparatory work before installation, sliding support installation, staircase component installation, staircase component installation.A kind of fabricated assembly overall stair construction method provided by the invention, the Forming Quality of fabricated assembly overall stair is good, does not need to carry out secondary decoration, prefabricated and installation speed is fast, and overall cost is lower, anti-seismic performance is good.It is promoted from overall assembled stair angle, realizes the application of assembled architecture gradually.
Description
Technical field
The present invention relates to a kind of stair construction methods, and in particular, the present invention relates to the one kind for being applied to the realm of building construction
Fabricated assembly overall stair construction method.
Background technique
The production of building is to be constructed to main means and realize for a long time.Architectural industrialization seeks to will to build
The mechanization production based on manufacturing is changed into production.Literally, it builds and manufactures only the change of one wordThe difference lies in a single word, but imply building
The deep reform of industry.It, will be from traditional mould of Hand Made that is, build the production of this ancient and special product
Formula turns to the modernization industry production model that main means are fabricated to factory.Building will really become a kind of work of modernization
Industry product, manufacture house is just becoming a reality as manufacture automobile.Hong Kong & Shanghai Banking co, the cultural center Paris, FRA Peng Pidu etc.
The Construction Practice of famous building has sent the dawn at dawn for the industrialization of building.
Building products are different from other industrial products, have distinct individual character and particularity.General industry product is in addition to product
Outside board, the name of an article, model, batch etc. main feature, the product for producing same model in enormous quantities is that general industry product is different from
The maximum feature of building products.The mass production that the individual character of building products distinctness does not allow to be not suitable on ordinary meaning yet, society
It can not accept and also not receive machine-made building.Due to the inherent characteristics of building products, Industrialization is relatively general
Industrial products are difficult.Therefore building Industrialization road, usually from it is a large amount of property, with identical service performance, compared with
It is easy the abstract residential housing sorted out, be easy modular coordination cooperation to start, comprehensive industrialization of building is done step-by-step.Developed country
Experience be proved this be correctly, the architectural industrialization in China is also to melt the beginning from housing industry.The house in current China
Industrialization is also in just getting started, our architects is needed to go to concentrate on studies the experience and external industrialization of successful foreign
Residential housing culture forms industrialized building culture with Chinese characteristics, to achieve the building industrialization cause in China.
Integrally assembling staircase occupies important status in housing industry, since the size of staircase is united very well
As soon as providing good chance to fabricated assembly overall stair large-area applications.In the assembled architecture that the country is built
First since application fabricated assembly overall stair, country's fabricated assembly overall stair are generallyd use cast-in-place at present
Embedded bar on beam, reserving hole on prefabricated gangboard, gangboard cover reserved steel bar in reserving hole when installing, then with than gangboard
Reserving hole is poured after the pea gravel concreten of a high grade, completes the installation of precast stair.Fabricated assembly overall stair mainly exist
Using more in double race stair, and using less in cantilever stair.The engineering of domestic application simultaneously, requires to be hoisting prefabricated
Component installs the biggish tower crane of Lifting Capacity, and tower crane expense is higher than conventional project by 30% or so.
Summary of the invention
It is an advantage of the invention to provide a kind of fabricated assembly overall stair construction methods, realize building and produce
The industrialization production of product especially monoblock type stair is conducive to the long-term sustainable development of building trade.
Above-mentioned purpose and other purposes of the invention solves by the following technical programs:
The present invention provides a kind of fabricated assembly overall stair construction method, which is characterized in that specific step is as follows:
(1) mold is constructed
1. the assembling of mold
A. mold base is transported to assembling place using tower crane, platform mould operation platform is mounted on mold base, then
Erecting bed mould bench typified form；
B. stairway die assembling is checked whether securely, tightly, according to situation is checked, take different measures: there are screws
Neglected loading, then again plus on screwed lock；There are gaps for mold, are sealed using sealing joint strip or double-sided adhesive, and adhesive tape does not enter
In concrete；There are at exposed iron hole, cloth waste or rubber plug plug reality, mortar leakage prevention are used；
C. the stairway die size after review assembling then dismantles the mold being completed there are when dimensional discrepancy, will correct
The stairway die crossed re-assemblies；
2. the cleaning of mold
A. before cleaning mold assembling it is all with mixed mud contact surface and it is related with size touch a mouthful face, when finding have in mold
It when sundries, is blown off using high pressure air pressure gun, bulk sundries is then manually sorted out；
B. in stairway die surface brush release agent or moulding oil, when die surface locally has obvious grease stain, using completely smearing
Cloth is wiped clear；
3. the inspection of mold
A., bench steel reinforcement cage is installed and closes mould, checks model, size, spacing, position, the installation of protective layer cushion block before entering mould
Position enters to check again for after mould the size of the installation site of protective layer, the tightness of tied silk, exposed iron；
B. model, position, the size of all built-in fittings are checked；
(2) staircase component component part is constructed
1. reinforcement construction
A. thickness of protection tier is 20mm, and cover to reinforcement uses plastic cushion, the interval 600mm of plastic cushion；
In plum blossom-shaped binding on outermost layer reinforcing bar, corner location is suitably encrypted；
B. reinforcing bar infall should must not jump bundle, tied silk tail end should not protrude outermost layer bar list using tied silk binding securely
Face and direction protective layer direction, every bind apply finger that tied silk head is pressed to the inside of iron cage at one；
C. framework of steel reinforcement size is accurate, and four suspension centres are used when lifting, puts down gently into mould, skeleton is prevented to be deformed；
D. cover to reinforcement uses plastic cushion, and secured with framework of steel reinforcement or mesh sheet binding, cushion block is arranged by plum blossom-shaped, in
In the heart away from 400mm；
E. answer straight, not damaged when framework of steel reinforcement enters mould, surface must not have greasy dirt or a corrosion, the modeling of exposed parts reinforcing bar
Material cloth package prevents from polluting；
F. framework of steel reinforcement and the pre-buried nail that hangs should be bound securely, hang nail by design position is pre-buried, and position is accurate；
G. built-in fitting is constructed, including joint bar, bolt, suspender；
2. concrete construction
It checks the mold being completed, checks whether mold, built-in fitting etc. have deformation and displacement, remove the miscellaneous of mould inside
Object；
B. C30 commerical ready-mixed concrete is used, and concrete mix molding temperature is not less than 5 DEG C, and is not higher than 35 DEG C；
C. concrete answers placement layer by layer, and lift height is not more than 500mm, and upper layer concrete connects before lower-layer concrete initial set
Continuous pour finishes；
D. the cloth shots of concreting take the measure for reducing concrete discharging impact preferably close to casting position；
E. after concreting, before concrete initial set and before final set, concrete exposed surface is carried out at plastering respectively
Reason；
F. concrete vibrating should use plug-in type vibrating stick or external vibrator, and human assistance can be used when necessary and vibrate,
It vibrates respectively according to placement layer by layer thickness, the front end of vibrating head should be inserted into previous layer concrete, and insertion is deep
Degree is not less than 50mm；
G. after the completion of staircase component pours, steam curing need to be carried out to it；
H. after staircase component reaches lifting intensity, it is hung to stockyard water seasoning on time, reaches design requirement in intensity
Building site is transported to after installation strength to be installed；
3. staircase component demoulds
A. the concrete test block intensity of cured under same condition should be examined before staircase component demoulding lifting, mean compressive strength reaches
15MPa or more can be demoulded, and if mean compressive strength fails to reach 15MPa, then the component need to continue to conserve；
B. before staircase component lifting, confirm that the coupling part between component and mold is removed completely, to hang nail without exception；
C. before staircase component lifting, check whether chain sling, hanging beam, lifting connector are complete, safety, nothing on gantry crane rail
Personnel and sundries；
D. staircase component need to be lifted by crane with hanging beam, and adjusting movable lifting point on hanging beam makes suspension centre distance with stair lifting point apart from phase
Symbol, the chain angle for being hung on same place are no more than 60 °, and weight must not pass through right above people, mold etc.；
E. it is stored in designated place after staircase component lifting, it is coarse to scrub out shearing resistance to the concrete surface at reinforcing bar
Face；
F. demould after, do not influence structural behaviour, reinforcing bar, the local damage of built-in fitting and component surface nonconservative scheme,
Surface or crack can be repaired with repairing slurry；
4. staircase component encodes
Code identification is sprayed in staircase component side, encoded content includes vendor code, project code, regional code, building
Terraced vertical position code, stair class code, stair horizontal position code, sequence numbering；
5. staircase component is stacked and transport
A. staircase component is deposited in the ground through concrete hardening or the nature terrace through artificial treatment, and stowed location is set
It is equipped with drainage arrangement；
B. when staircase component stacking needs to be overlapped, stair are spaced apart by the flitch or concrete pad pier that use is solid, smooth,
And flitch or concrete pad pier are placed in same vertical line, when staircase component is contacted with metal storage rack, use 1cm or more
Thickness rubber separates staircase component and metal storage rack；
C. conveying bracket, compartment board and staircase should be put into flexible material, staircase component application wirerope or fixture and support
The concrete of frame binding structural member corner or chain contact site should be using flexible gasket material protection, according to the not of the same race of product
Class is toppled to prevent product from sliding, and need to be reinforced with bandage, strut, cucurbit to product；
D. after staircase component is transported to construction site, heap should be respectively set by specification, kind, position used, lifting sequence
, live stockyard should be arranged within the scope of crane, and channel is arranged between stacking；
(3) stair preparatory work before installation
A. it according to construction characteristic, tells somebody what one's real intentions are item by item to subdivisional work；
B. staircase component lifting checking computations are carried out, stress checking calculation including tension reinforcement, when hanging nail checking computations, staircase component installation
Rotate angle calculation；
C. the measurement and positioning before staircase component installation is carried out, it is flat to set up operation for the position 1m below terraced beam face between staircase component
Platform, every layer is arranged at least one pilot measurement vertical control point, and axis vertical control point in every floor face should not be less than 4, control axis
It throws and surveys to respective storey, checked by closed figures to survey axis is thrown on structural plan；
D. staircase component installation before, staircase component side pop-up vertically and be horizontally mounted line, vertically be horizontally mounted
Line coincides with floor installation site line, before installing staircase component on cast-in-place terraced beam, according to vertical control point to terraced beam face
Absolute altitude checked, checked according to axial location of the control axis of floor to cast-in-place terraced beam；
E. between strict control staircase component wall and terraced beam axis shift and verticality, axis shift controls within 5mm,
In 4mm, section mould inside dimension deviation should control in ± 4mm the interlayer degree control of wall mould；
F. terraced beam face and terraced beam choose the horizontal absolute altitude of ear, terraced beam face and terraced beam between staircase component between strict control staircase component
After the completion of choosing ear concreting, terraced beam face and terraced beam are chosen within the absolute altitude control ± 5mm in ear face, and terraced beam face and terraced beam choose ear table
Surface evenness controls in 3mm, should carry out picking the cement and thin fish rice stone packed with 1:1 when such as horizontal absolute altitude is higher than designed elevation
Carry out it is levelling, as bottom in designed elevation application 1:1 cement and fish rice stone carry out it is levelling；
(4) sliding support is installed
A. polyfluortetraethylene plate is first cut into using bladed saw by 250mm wide, several pieces of 1200mm long, in every piece of polytetrafluoro
Dimensioning in vinyl plate, with diameter 8mm bit bore；
B. hole-drilled polyfluortetraethylene plate is placed in the terraced beam in the middle part of staircase component and chosen on ear surface, then use red lead
Pen in beam face and is chosen ear face and is marked to the position of polyfluortetraethylene plate drilling, then using the electric hammer of diameter 8mm drill bit into
Row drilling, drilling depth 100mm；
C. the dust in hole is blown using air blower, fills up hole internal pore with anchoring adhesive, polyfluortetraethylene plate is pacified again
It is placed on terraced beam face, the hole bored on the face Kong Yuliang bored on polyfluortetraethylene plate is consistent, then anchoring adhesive is squeezed into hole, finally
The stainless steel flat head screw of 70mm long diameter 4mm is hammered into the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, plate face is squeezed
Anchoring adhesive out should be wiped to the greatest extent, and be pushed down polyfluortetraethylene plate and flat head screw with weight, and anchoring adhesive hardens again after 24 hours
Weight is removed；
(5) the installation of staircase component
Chain sling is hung up before handling on crane hook, while being hung in the circle of bench and nailing on mounting hanger, tower crane is from bench
The flooring for stacking field handling 4 bench to construction layers is laid flat, and on chain sling and installs shackle on the suspender of bench, lifting calabash
The unloading for chain sling that hang over of reed is buckled, and adjusts the length of chain block, the shackle on steel wire penetrating suspender, is hung over and is hung
On the suspension hook for filling cucurbit, the hanging belt of protection and the drawstring of positioning are installed, tower crane lifts by crane bench, and utilizes lifting in bench
Cucurbit adjusts bench angle, and designated floor is hoisted to out of stairwell, and staristep is adjusted to support using lifting cucurbit again
Horizontal angle falls on the installation site of bench under crane hook, is finely adjusted with lifting cucurbit, according to the control by elevator
Axis and terraced beam and the installation site for choosing the installation control pair bench on ear are corrected with crowbar, and bench installation is in place；
(6) the construction after staircase component installation
1. the construction of landing plate is poured after
Construction after staircase component installation: waste and old template is processed into shape of marking time, stair step is protected, is prevented
Cast-in-place wall, Liang Shi, pollute caused by bench, or damage when transhipment construction material to stair step；
2. the construction of landing plate is poured after
A. the bed die for armoured concrete slab first being poured after is completed, then the reserved steel bar of stair bench and reserving for Bars In Poured Concrete Slab
Reinforcing bar is first bound, and is then welded by single welding 10d, has bound distributing reinforcement；
B. to the joint location of the Reinforcement of plate, connector quantity, connector area percentage, weldering before casting concrete
Spreading degree is checked, but also to be checked the quality of concrete rough surface；
C. reserved spool should be installed before concreting, while template is soaked, bench concrete rough surface brush
A time cement slurry；
D. the concrete of armoured concrete slab is poured afterwards using C35 expansive concrete, than original Bars In Poured Concrete Slab concrete grade
It improves a grade, outer body panel is hung to suspension bucket using tower crane when concreting, concrete is shifted onto stair with trolley
The position that plate is poured after platform is poured, while being vibrated using internal vibration stick to concrete, manually twice to coagulation
Soil carries out receiving light floating.
The advantages and beneficial effects of the present invention are:
1. a kind of fabricated assembly overall stair construction method provided by the invention, industrialization degree is higher, and stair are whole
For factory's production, in-site installation, stair Forming Quality is good, and live construction efficiency is higher, solves cast-in-situ steel reinforced concrete
Whole stair speed of application is slow, the poor problem of the level of stair Forming Quality and safety construction, and it is few to expend timber,
Environmental protection and economy.
2. a kind of fabricated assembly overall stair construction method provided by the invention, one end of stair are sliding support, one
The concrete bearing that end is poured after being can effectively reduce the concentrated stress that seismic wave generates staristep, solve assembled steel reinforced
The problem of concrete staircase poor seismic behavior.
3. a kind of fabricated assembly overall stair construction method provided by the invention, using the lifting cucurbit tune on suspension hook
The angle of whole staristep lifting, solves because stairwell is narrow, bench can not handling the problem of.
Specific embodiment
According to the technique and scheme of the present invention, in the case where not changing connotation of the invention, the common skill of this field
Art personnel can propose multiple frame modes of the invention.Therefore following specific embodiments are only to technical solution of the present invention
Illustrate, and be not to be construed as whole of the invention or be considered as to define or limit technical solution of the present invention.
The present invention provides a kind of fabricated assembly overall stair construction method, and specific steps include mold construction, stair structure
The construction of part component part, stair preparatory work before installation, sliding support installation, staircase component installation, staircase component peace
Construction after dress.
Mold construction includes assembling, the cleaning of mold and the inspection of mold of mold.
Die steel preferably uses Q235 steel to make, and die surface is smooth, smooth, and scratch, rusty stain phenomenon is not present.
The assembling of mold: mold base is transported to assembling place using tower crane, platform mould operation platform is mounted on mold bottom
On seat, then erecting bed mould bench typified form；Check that whether securely, tightly stairway die assembling, according to situation is checked, is taken
Different measures: there are neglected loading of screw, then again plus on screwed lock；Mold there are gap, using sealing joint strip or double-sided adhesive into
Row sealing, and adhesive tape does not enter in concrete；There are at exposed iron hole, cloth waste or rubber plug plug reality, mortar leakage prevention are used；Review group
Stairway die size after dress then dismantles the mold being completed there are when dimensional discrepancy, again by corrected stairway die
Assembling.
The cleaning of mold: cleaning it is all with mixed mud contact surface and it is related with size touch a mouthful face, as having in discovery mold
Sundries need to be blown clean with high pressure air pressure gun, and bulk sundries need to be sorted out manually；If size discovery have deviation, need to dismantle module reset to
Until closing symbol requirement；Mold brush release agent or moulding oil will be sprayed, be brushed uniformly, locally had obvious grease stain, wiped clean with clean rag,
Want polishing in the place of drain spray brush.
The inspection of mold: check whether model, size, spacing, position are correct before entering mould, whether just protective layer cushion block is placed
Really；Check again for whether protective layer is correct, whether tied silk is loose after entering mould, whether exposed iron size is correct；It checks all pre-buried
Part model, position, size, it is ensured that model, position, size are correct.
The construction of staircase component component part includes reinforcement construction, concrete construction, staircase component demoulding, staircase component volume
Code, staircase component are stacked and transport.
Reinforcement construction: rebar surface is not damaged, crackle or rusty stain.
SteelTendon protective layer thickness is 20mm, and cover to reinforcement uses plastic cushion, the interval 600mm of plastic cushion；It is in
Plum blossom-shaped is bound on outermost layer reinforcing bar, and corner location suitably encrypts.
Reinforcing bar infall should must not jump bundle, tied silk tail end should not protrude outermost layer rebar surface using tied silk binding securely
And it is directed toward protective layer direction, apply finger that tied silk head is pressed to the inside of iron cage at every binding one, qualified iron cage is answered on inspection
It is put by designated place, iron cage can stack, but no more than four layers.
Framework of steel reinforcement size is accurate, and four suspension centres are used when lifting, puts down gently into mould, skeleton is prevented to be deformed.
Cover to reinforcement uses plastic cushion, and secured with framework of steel reinforcement or mesh sheet binding, cushion block is arranged by plum blossom-shaped, center
Spacing 400mm.
Framework of steel reinforcement is answered straight, not damaged when entering mould, surface must not have greasy dirt or corrosion, exposed parts reinforcing bar plastics
Cloth package prevents from polluting.
Framework of steel reinforcement and the pre-buried nail that hangs should be bound securely, hang nail by design position is pre-buried, and position is accurate.
Built-in fitting construction, including joint bar, bolt, suspender, position of center line tolerance are ± 5mm, and protruded length allows
Deviation is+5~0mm, and installation verticality tolerance is 1/40mm.
Concrete construction: checking the mold being completed, and checks whether mold, built-in fitting have deformation and displacement, removes mould
Sundries inside tool.
Staircase component uses C30 commerical ready-mixed concrete, and concrete molding temperature is not less than 5 DEG C, and is not higher than 35 DEG C.
Concrete answers placement layer by layer, and lift height is not more than 500mm, and upper layer concrete is continuous before lower-layer concrete initial set
It pours and finishes.
The cloth shots of concreting take the measure for reducing concrete discharging impact preferably close to casting position.
After concreting, before concrete initial set and before final set, plastering processing is carried out to concrete exposed surface respectively.
Concrete vibrating should use plug-in type vibrating stick or external vibrator, and human assistance can be used when necessary and vibrate, press
It vibrates respectively according to placement layer by layer thickness, the front end of vibrating head should be inserted into previous layer concrete, and insertion depth is not less than
50mm；Vibrating head, which should be inserted to pull out slowly perpendicular to concrete surface and fastly, uniformly to vibrate；When concrete surface is without obviously collapsing, have cement
When slurry occurs, no longer bubbles, the position should be terminated and vibrated；Vibrating head should not exceed vibrating head operating radius at a distance from template
50%；Slotting point spacing of vibrating should not exceed 1.4 times of operating radius of vibrating spear；The maximum gauge that concrete delamination vibrates is not answered
Greater than 1.25 times of vibrating head effect partial length.
After the completion of staircase component pours, steam curing need to be carried out to it.
After staircase component reaches lifting intensity, it is hung to stockyard water seasoning on time, reaches the peace of design requirement in intensity
Building site is transported to after dress intensity to be installed.
Staircase component demoulding: should examine the concrete test block intensity of cured under same condition before staircase component demoulding lifting, average
Compression strength, which reaches 15MPa or more, to be demoulded, and if mean compressive strength fails to reach 15MPa, then the component need to continue
Maintenance.
Before staircase component lifting, confirm that the coupling part between component and mold is removed completely, to hang nail without exception.
Before staircase component lifting, check whether chain sling, hanging beam, lifting connector complete, safety, on gantry crane rail nobody
Member and sundries.
Staircase component need to be lifted by crane with hanging beam, and adjusting movable lifting point on hanging beam makes suspension centre distance with stair lifting point apart from phase
Symbol, the chain angle for being hung on same place are no more than 60 °, and weight must not pass through right above people, mold etc..
It is stored in designated place after staircase component lifting, it is coarse to scrub out shearing resistance to the concrete surface at reinforcing bar
Face.
After demoulding, do not influence structural behaviour, reinforcing bar, the local damage of built-in fitting and component surface nonconservative scheme, can
Surface or crack are repaired with repairing slurry.
According to different breakages, respectively using dedicated repairing slurry, the asphalt mixtures modified by epoxy resin for being not less than concrete design strength
Rouge slurry, the repairing of special-purpose water-proof slurry；For crack, V-type hole (need to carve to crackle root) is carved out with chisel along crack location, is made
Crackle is cleaned out with wire brush, avoids grease, dust and the stone of loosening in crack, crack site clear water is moistened
It is wet, it allows it to air-dry 3min, the patching material converted is cheated along V-type and uniformly brushes one layer, and air-dries 3min；For losing fangle,
Losing fangle part is first removed loose part completely with wire brush, and losing fangle position is soaked with clear water, it is allowed to air-dry
3min will need repairing position, it is ensured that have the gap and be filled, struck off with plaster trowel to original size on patching material batch；Needle
To surface pores, the place first watering wetting of blemish surface will need to be repaired, will be filled using patching material to fault location, then with smearing
Grey knife smooth out surface after material to be repaired is fully hardened, is polished smooth mend surface with sand paper, using clear water repairing
Place rinse well.
Staircase component coding: code identification is sprayed in staircase component side, encoded content includes vendor code, project volume
Code, regional code, stair vertical position code, stair class code, stair horizontal position code, sequence numbering.
Staircase component is stacked and transport: staircase component be deposited in ground through concrete hardening or through artificial treatment from
Right terrace, stowed location are provided with drainage arrangement.When staircase component stacking needs to be overlapped, use is solid, smooth flitch or mix
Stair are spaced apart by solidifying soil pad pier, and flitch or concrete pad pier are placed in same vertical line, when staircase component and metal are deposited
When putting bridge joint touching, staircase component and metal storage rack are separated using 1cm or more thickness rubber.Conveying bracket, compartment board and building
It should be put into flexible material between ladder, staircase component application wirerope or fixture and bracket binding structural member corner or chain contact site
Concrete should be toppled using flexible gasket material protection according to the variety classes of product to prevent product from sliding, need to bandage,
Strut, cucurbit reinforce product.It, should be by specification, kind, position used, lifting after staircase component is transported to construction site
Stockyard is respectively set in sequence, and live stockyard should be arranged within the scope of crane, and channel is arranged between stacking.
Stair preparatory work before installation: it according to construction characteristic, tells somebody what one's real intentions are item by item to subdivisional work.Carry out staircase component
Lifting checking computations, stress checking calculation including tension reinforcement rotate angle calculation when hanging nail checking computations, staircase component installation.Carry out stair
Measurement and positioning before component installation, operating platform, every layer of setting at least one are set up in the position 1m below terraced beam face between staircase component
A pilot measurement vertical control point, the vertical control point of every floor face axis should not be less than 4, and control axis, which is thrown, to be surveyed to respective storey,
It is checked by closed figures to survey axis is thrown on structural plan.Before staircase component installation, popped up in the side of staircase component
It is vertical and be horizontally mounted line, vertically be horizontally mounted line and coincide with floor installation site line, building is installed on cast-in-place terraced beam
It before terraced component, is checked according to absolute altitude of the vertical control point to terraced beam face, according to the control axis of floor to cast-in-place terraced beam
Axial location is checked.The axis shift and verticality of wall and terraced beam between strict control staircase component, axis shift control exist
Within 5mm, in 4mm, section mould inside dimension deviation should control in ± 4mm the interlayer degree control of wall mould.Strict control
Terraced beam face and terraced beam choose the horizontal absolute altitude of ear between staircase component, and terraced beam face and terraced beam choose ear concreting completion between staircase component
Afterwards, terraced beam face and terraced beam are chosen within the absolute altitude control ± 5mm in ear face, and terraced beam face and terraced beam choose the control of ear surface smoothness in 3mm
It is interior, should carry out picking when such as horizontal absolute altitude is higher than designed elevation pack carried out with the cement of 1:1 and thin fish meter stone it is levelling, if bottom is in setting
Cement and the fish rice stone progress for counting absolute altitude application 1:1 are levelling.
Polyfluortetraethylene plate: being first cut into 250mm wide, several pieces of 1200mm long using bladed saw by sliding support installation,
The dimensioning on every piece of polyfluortetraethylene plate, with diameter 8mm bit bore.
Hole-drilled polyfluortetraethylene plate is placed in terraced beam in the middle part of staircase component and is chosen on ear surface, then with red lead pen
The position of polyfluortetraethylene plate drilling in beam face and is chosen by ear face is marked, is then carried out using the electric hammer of diameter 8mm drill bit
Drilling, drilling depth 100mm.
The dust in hole is blown using air blower, fills up hole internal pore with anchoring adhesive, polyfluortetraethylene plate is placed again
On terraced beam face, the hole bored on the face Kong Yuliang bored on polyfluortetraethylene plate is consistent, then anchoring adhesive is squeezed into hole, finally handle
The stainless steel flat head screw of 70mm long diameter 4mm hammers into the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, and plate face squeezes out
Anchoring adhesive should wipe to the greatest extent, and polyfluortetraethylene plate and flat head screw are pushed down with weight, after 24 hours anchoring adhesive hardening again
Weight is removed.
The installation of staircase component: chain sling is hung up before handling on crane hook, while hanging and nailing in the circle of bench
Mounting hanger, tower crane are laid flat from the flooring that bench stacks field handling 4 bench to construction layers, on chain sling and on the suspender of bench
Shackle is installed, the unloading for chain sling that hang over of lifting cucurbit is buckled, and adjust the length of chain block, steel wire penetrating
Shackle on suspender hangs on the suspension hook for lifting cucurbit, the hanging belt of protection and the drawstring of positioning, tower crane is installed in bench
Bench is lifted by crane, and adjusts bench angle using lifting cucurbit, designated floor is hoisted to out of stairwell, utilizes lifting cucurbit again
Staristep is adjusted to the angle of support level, the installation site of bench is fallen under crane hook, is finely adjusted with lifting cucurbit,
School is carried out with crowbar according to the control axis and terraced beam by elevator and the installation site for choosing the installation control pair bench on ear
Just, bench installation is in place.
Construction after staircase component installation: waste and old template is processed into shape of marking time, stair step is protected, is prevented
Cast-in-place wall, Liang Shi, pollute caused by bench, or damage when transhipment construction material to stair step.
The construction of landing plate is poured afterwards should first pour the bed die of armoured concrete slab after and complete, then the reserved of stair bench
The reserved steel bar of reinforcing bar and Bars In Poured Concrete Slab is first bound, and is then welded by single welding 10d, has bound distributing reinforcement.It pours mixed
The joint location, connector quantity, connector area percentage, welding of the Reinforcement of armoured concrete slab are poured before solidifying soil to after
Length is checked, but also to be checked the quality of bench concrete rough surface.It should be installed before concreting pre-
Spool is stayed, while template is soaked, bench concrete rough surface brushes one times cement slurry.
The concrete of armoured concrete slab is poured afterwards using C35 expansive concrete, is mentioned than original Bars In Poured Concrete Slab concrete grade
A high grade is hung to outer body panel with suspension bucket using tower crane when concreting, concrete is shifted onto stair with trolley and is put down
The position that plate is poured after platform is poured, while being vibrated using internal vibration stick to concrete, manually twice to concrete
It carries out receiving light floating.
Claims (1)
1. a kind of fabricated assembly overall stair construction method, which is characterized in that specific step is as follows:
(1) mold is constructed
1. the assembling of mold
A. mold base is transported to assembling place using tower crane, platform mould operation platform is mounted on mold base, is then installed
Platform mould bench typified form；
B. check stairway die assembling whether securely, it is tight, according to situation is checked, take different measures: there are neglected loading of screw,
Then again plus on screwed lock；There are gaps for mold, are sealed using sealing joint strip or double-sided adhesive, adhesive tape does not enter concrete
It is interior；There are at exposed iron hole, cloth waste or rubber plug plug reality, mortar leakage prevention are used；
C. the stairway die size after review assembling then dismantles the mold being completed there are when dimensional discrepancy, will be corrected
Stairway die re-assemblies；
2. the cleaning of mold
A. before cleaning mold assembling it is all with mixed mud contact surface and it is related with size touch a mouthful face, when finding there is sundries in mold
When, it is blown off using high pressure air pressure gun, bulk sundries is then manually sorted out；
B. it in stairway die surface brush release agent or moulding oil, when die surface locally has obvious grease stain, is smeared using clean rag
Only；
3. the inspection of mold
A., bench steel reinforcement cage is installed and closes mould, checks model, size, spacing, position, the installation position of protective layer cushion block before entering mould
It sets, enters to check again for after mould the size of the installation site of protective layer, the tightness of tied silk, exposed iron；
B. model, position, the size of all built-in fittings are checked；
(2) staircase component component part is constructed
1. reinforcement construction
A. thickness of protection tier is 20mm, and cover to reinforcement uses plastic cushion, the interval 600mm of plastic cushion；In plum
On outermost layer reinforcing bar, corner location is suitably encrypted for flower-shaped binding；
B. reinforcing bar infall should must not jump bundle using tied silk binding securely, tied silk tail end should not protrude outermost layer rebar surface and
It is directed toward protective layer direction, applies finger that tied silk head is pressed to the inside of iron cage at every binding one；
C. framework of steel reinforcement size is accurate, and four suspension centres are used when lifting, puts down gently into mould, skeleton is prevented to be deformed；
D. cover to reinforcement uses plastic cushion, and secured with framework of steel reinforcement or mesh sheet binding, cushion block is arranged by plum blossom-shaped, between center
Away from 400mm；
E. answer straight, not damaged when framework of steel reinforcement enters mould, surface must not have greasy dirt or corrosion, exposed parts reinforcing bar plastic cloth
Package prevents from polluting；
F. framework of steel reinforcement and the pre-buried nail that hangs should be bound securely, and design position is pre-buried to hang nail, and position is accurate；
G. built-in fitting is constructed, including joint bar, bolt, suspender；
2. concrete construction
A. it checks the mold being completed, checks whether mold, built-in fitting have deformation and displacement, remove the sundries of mould inside；
B. C30 commerical ready-mixed concrete is used, and concrete molding temperature is not less than 5 DEG C, and is not higher than 35 DEG C；
C. concrete answers placement layer by layer, and lift height is not more than 500mm, and upper layer concrete is continuously poured before lower-layer concrete initial set
It builds and finishes；
D. the cloth shots of concreting take the measure for reducing concrete discharging impact preferably close to casting position；
E. after concreting, before concrete initial set and before final set, plastering processing is carried out to concrete exposed surface respectively；
F. concrete vibrating should use plug-in type vibrating stick or external vibrator, and human assistance can be used when necessary and vibrate, according to
Placement layer by layer thickness vibrates respectively, and the front end of vibrating head should be inserted into previous layer concrete, and insertion depth is not less than 50mm；
G. after the completion of staircase component pours, its upper surface need to be covered and watering on time keeps wet；
H. after staircase component reaches lifting intensity, it is hung to stockyard water seasoning on time, reaches the installation of design requirement in intensity
Building site is transported to after intensity to be installed；
3. staircase component demoulds
A. the concrete test block intensity of cured under same condition should be examined before staircase component demoulding lifting, mean compressive strength reaches
15MPa or more can be demoulded, and if mean compressive strength fails to reach 15MPa, then the component need to continue to conserve；
B. before staircase component lifting, confirm that the coupling part between component and mold is removed completely, to hang nail without exception；
C. before staircase component lifting, check whether chain sling, hanging beam, lifting connector are complete, safety, without personnel on gantry crane rail
And sundries；
D. staircase component need to be lifted by crane with hanging beam, and adjusting movable lifting point on hanging beam makes suspension centre distance be consistent with stair lifting point distance,
The chain angle for being hung on same place is no more than 60 °, and weight must not pass through right above people, mold；
E. it is stored in designated place after staircase component lifting, to scrub out shearing resistance rough surface to the concrete surface at reinforcing bar；
F. demould after, do not influence structural behaviour, reinforcing bar, the local damage of built-in fitting and component surface nonconservative scheme, can use
Repairing slurry repairs surface or crack；
4. staircase component encodes
Code identification is sprayed in staircase component side, and encoded content includes that vendor code, project code, regional code, stair are perpendicular
To position code, stair class code, stair horizontal position code, sequence numbering；
5. staircase component is stacked and transport
A. staircase component is deposited in the ground through concrete hardening or the nature terrace through artificial treatment, and stowed location is provided with
Drainage arrangement；
B. when staircase component stacking needs to be overlapped, stair are spaced apart by the flitch or concrete pad pier that use is solid, smooth, and wood
Side or concrete pad pier are placed in same vertical line, when staircase component is contacted with metal storage rack, use 1cm or more thickness
Rubber separates staircase component and metal storage rack；
C. conveying bracket, compartment board and staircase should be put into flexible material, and staircase component application wirerope or fixture are tied up with bracket
The concrete for pricking component corner or chain contact site should be protected using flexible gasket material, according to the variety classes of product, be
It prevents product from sliding, topples, product need to be reinforced with bandage, strut, lifting cucurbit；
D. after staircase component is transported to construction site, stockyard should be respectively set by specification, kind, position used, lifting sequence, it is existing
Field stockyard should be arranged within the scope of crane, and channel is arranged between stacking；
(3) stair preparatory work before installation
A. it according to construction characteristic, tells somebody what one's real intentions are item by item to subdivisional work；
B. rotation when staircase component lifts the stress checking calculation checked, including tension reinforcement, hangs nail checking computations, staircase component installation is carried out
Angle calculation；
C. the measurement and positioning before staircase component installation is carried out, it is every to set up operating platform for the position 1m below terraced beam face between staircase component
At least one pilot measurement vertical control point is arranged in layer, and axis vertical control point in every floor face should not be less than 4, and control axis, which is thrown, to be surveyed extremely
After respective storey, checked by closed figures to survey axis is thrown on structural plan；
D. staircase component installation before, staircase component side pop-up vertically and be horizontally mounted line, vertically be horizontally mounted line with
Floor installation site line coincides, before installing staircase component on cast-in-place terraced beam, according to vertical control point to the mark in terraced beam face
Height is checked, and is checked according to axial location of the control axis of floor to cast-in-place terraced beam；
E. between strict control staircase component wall and terraced beam axis shift and verticality, axis shift controls the wall mould within 5mm
Interlayer degree control in 4mm, section mould inside dimension deviation should control in ± 4mm；
F. terraced beam face and terraced beam choose the horizontal absolute altitude of ear between strict control staircase component, and it is mixed to choose ear for terraced beam and terraced beam between staircase component
After the completion of solidifying soil pours, terraced beam face and terraced beam are chosen within the absolute altitude control ± 5mm in ear face, and terraced beam face and terraced beam choose ear surfacing
Degree control should be carried out picking packing and be looked for the cement of 1:1 and thin fish rice stone in 3mm when such as horizontal absolute altitude is higher than designed elevation
It is flat, as bottom is levelling in the cement of designed elevation application 1:1 and fish rice stone progress；
(4) sliding support is installed
A. polyfluortetraethylene plate is first cut into using bladed saw by 250mm wide, several pieces of 1200mm long, in every block of polytetrafluoroethylene (PTFE)
Dimensioning on plate, with diameter 8mm bit bore；
B. hole-drilled polyfluortetraethylene plate is placed in the terraced beam in the middle part of staircase component and chosen on ear surface, then is right with red lead pen
The position of polyfluortetraethylene plate drilling in beam face and is chosen ear face and is marked, and is then bored using the electric hammer of diameter 8mm drill bit
Hole, drilling depth 100mm；
C. the dust in hole is blown using air blower, fills up hole internal pore with anchoring adhesive, polyfluortetraethylene plate is placed in again
On terraced beam face, the hole bored on the face Kong Yuliang bored on polyfluortetraethylene plate is consistent, then anchoring adhesive is squeezed into hole, finally handle
The stainless steel flat head screw of 70mm long diameter 4mm hammers into the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, and plate face squeezes out
Anchoring adhesive should wipe to the greatest extent, and polyfluortetraethylene plate and flat head screw are pushed down with weight, after 24 hours anchoring adhesive hardening again
Weight is removed；
(5) the installation of staircase component
Chain sling is hung up before handling on crane hook, while being hung in the circle of bench and nailing on mounting hanger, tower crane is stacked from bench
The flooring of field handling 4 bench to construction layers is laid flat, and on chain sling and installs shackle on the suspender of bench, lifting cucurbit
It hangs over unloading for chain sling to buckle, and adjusts the length of lifting cucurbit, the shackle on steel wire penetrating suspender, hang over lifting calabash
On the suspension hook of reed, the hanging belt of protection and the drawstring of positioning are installed, tower crane lifts by crane bench, and utilizes lifting cucurbit in bench
Bench angle is adjusted, designated floor is hoisted to out of stairwell, staristep is adjusted to support level using lifting cucurbit again
Angle, the installation site of bench is fallen under crane hook, is finely adjusted with lifting cucurbit, according to the control axis by elevator
It is corrected with terraced beam and the installation site for choosing the installation control pair bench on ear with crowbar, bench installation is in place；(6) stair
Construction after component installation
1. the construction of landing plate is poured after
A. the bed die for armoured concrete slab first being poured after is completed, then the reserved steel bar of stair bench and the reserved steel bar of Bars In Poured Concrete Slab
It is first bound, is then welded by single welding 10d, bound distributing reinforcement；
B. the joint location of the Reinforcement of plate, connector quantity, connector area percentage, welding are grown before casting concrete
Degree is checked, but also to be checked the quality of concrete rough surface；
C. reserved spool should be installed before concreting, while template is soaked；
D. the concrete of armoured concrete slab is poured afterwards using C35 expansive concrete, is improved than original Bars In Poured Concrete Slab concrete grade
One grade is hung to outer body panel with suspension bucket using tower crane when concreting, concrete is shifted onto landing with trolley
The position for pouring plate afterwards is poured, while is vibrated to concrete using internal vibration stick, manually twice to concrete into
Row is received light and is smoothed out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208578.0A CN106150001B (en) | 2015-04-28 | 2015-04-28 | A kind of fabricated assembly overall stair construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208578.0A CN106150001B (en) | 2015-04-28 | 2015-04-28 | A kind of fabricated assembly overall stair construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150001A CN106150001A (en) | 2016-11-23 |
| CN106150001B true CN106150001B (en) | 2019-02-01 |
Family
ID=57346563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510208578.0A Active CN106150001B (en) | 2015-04-28 | 2015-04-28 | A kind of fabricated assembly overall stair construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106150001B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106760275A (en) * | 2016-11-24 | 2017-05-31 | 中冶建工集团有限公司 | The construction method of stainless steel spiral stairses is installed using sectional shelf-unit |
| CN107345439A (en) * | 2017-07-21 | 2017-11-14 | 中建八局第建设有限公司 | A kind of making of precast stair component and installation method |
| CN108032414A (en) * | 2017-11-24 | 2018-05-15 | 绍兴市永坚建筑科技有限公司 | A kind of mold cleaning assemble method of precast concrete |
| CN108032424A (en) * | 2017-11-24 | 2018-05-15 | 绍兴市永坚建筑科技有限公司 | A kind of production technology of prefabricated component stair |
| CN108071239B (en) * | 2017-12-21 | 2021-03-05 | 中冶东北建设（沈阳）工程技术有限公司 | Method for instantly implanting PC stair anchoring steel bar |
| CN108582409A (en) * | 2018-04-25 | 2018-09-28 | 安徽海龙建筑工业有限公司 | A kind of decoration integrated prefabricated components dry type paved production technology |
| CN111485686A (en) * | 2019-01-25 | 2020-08-04 | 河南天久装配式建筑有限公司 | Light sandwich reinforced concrete stair structure and construction method |
| CN110067350A (en) * | 2019-05-06 | 2019-07-30 | 上海聚通装饰集团有限公司 | A kind of composite floor board is marked time anti-skidding receipts side structure and its mounting process |
| CN110629949A (en) * | 2019-07-03 | 2019-12-31 | 辽宁煜梽新型建材有限公司 | On-site construction method of stair tread |
| CN110625731A (en) * | 2019-07-03 | 2019-12-31 | 辽宁煜梽新型建材有限公司 | Method for manufacturing stair tread |
| CN110744865B (en) * | 2019-11-01 | 2020-11-24 | 浏阳市龙腾木制品厂 | Measurement mold making method for manufacturing twisted handrail of wood stair |
| CN113618895A (en) * | 2021-08-15 | 2021-11-09 | 娄底远大建筑工业有限公司 | Production process of concrete prefabricated staircase |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2349289Y (en) * | 1998-11-28 | 1999-11-17 | 李岭群 | Prefabricated integral stairs board |
| CN1664270A (en) * | 2005-04-08 | 2005-09-07 | 贵州大学 | Integrally assembling staircase and method for fabricating same |
| CN201217898Y (en) * | 2008-06-19 | 2009-04-08 | 黑龙江宇辉新型建筑材料有限公司 | Concrete prefabricated stairs |
| CN102296816A (en) * | 2011-06-20 | 2011-12-28 | 南通建筑工程总承包有限公司 | Factorial construction method for component of total prefabricated assembly integral type shear wall structure system |
| CN102619309A (en) * | 2012-03-06 | 2012-08-01 | 北京工业大学 | Reinforced concrete stair provided with local supporting type efficient sliding support |
| CN203863813U (en) * | 2014-04-11 | 2014-10-08 | 沈阳卫德住宅工业化科技有限公司 | Die special for housing industrialization pre-cast concrete component stair |
| CN104481090A (en) * | 2014-11-24 | 2015-04-01 | 江苏中南建筑产业集团有限责任公司 | Full precast concrete stair sliding connecting system and construction method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100905806B1 (en) * | 2008-09-11 | 2009-07-02 | 정민선 | Precast concrete stair system |
| WO2013161065A1 (en) * | 2012-04-27 | 2013-10-31 | 前田建設工業株式会社 | Formwork apparatus for precast concrete stairway, and casting method for precast concrete stairway |
-
2015
- 2015-04-28 CN CN201510208578.0A patent/CN106150001B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2349289Y (en) * | 1998-11-28 | 1999-11-17 | 李岭群 | Prefabricated integral stairs board |
| CN1664270A (en) * | 2005-04-08 | 2005-09-07 | 贵州大学 | Integrally assembling staircase and method for fabricating same |
| CN201217898Y (en) * | 2008-06-19 | 2009-04-08 | 黑龙江宇辉新型建筑材料有限公司 | Concrete prefabricated stairs |
| CN102296816A (en) * | 2011-06-20 | 2011-12-28 | 南通建筑工程总承包有限公司 | Factorial construction method for component of total prefabricated assembly integral type shear wall structure system |
| CN102619309A (en) * | 2012-03-06 | 2012-08-01 | 北京工业大学 | Reinforced concrete stair provided with local supporting type efficient sliding support |
| CN203863813U (en) * | 2014-04-11 | 2014-10-08 | 沈阳卫德住宅工业化科技有限公司 | Die special for housing industrialization pre-cast concrete component stair |
| CN104481090A (en) * | 2014-11-24 | 2015-04-01 | 江苏中南建筑产业集团有限责任公司 | Full precast concrete stair sliding connecting system and construction method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 预制楼梯和预制阳台在住宅中的应用研究;潘雨红;《城市住宅》;20150315(第3期);第97-102页 |
| 预制混凝土楼梯与结构连接浅析;牛犇等;《住宅产业》;20150120(第1期);第59-61页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150001A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106150001B (en) | A kind of fabricated assembly overall stair construction method | |
| CN108505644B (en) | CL composite concrete shear wall construction method | |
| CN106182359B (en) | The horizontal molding die of concrete list storehouse pipe gallery, system and piping lane molding methods | |
| CN108457243B (en) | Construction method of assembled concrete breakwater | |
| CN107989401A (en) | A kind of existing building external wall reconstruction structure and construction method | |
| CN104594387A (en) | Improved post-pouring strip advanced water-stopping construction method | |
| CN102116061A (en) | Masonry construction method for filling wall core pillar, core girder and building blocks into framework structure | |
| CN108032424A (en) | A kind of production technology of prefabricated component stair | |
| CN107268878A (en) | The fabrication and installation method of prefabricated sandwich wallboard | |
| CN103469806A (en) | Construction method for replacing brick forming die with prefabricated concrete foundation bearing platform side die | |
| CN106801517A (en) | A kind of schoolhouse surface consolidation of Prefabricated porous plate brick mixed structure strengthens method | |
| CN110552440A (en) | safe and environment-friendly construction process for high-strength assembled integral type sandwich heat-insulation shear wall | |
| CN105178604A (en) | Construction method of assembly type superimposed floor slab | |
| CN106088493A (en) | A kind of pin key connects mounting structure and the construction thereof of prefabricated bench | |
| CN104532987A (en) | Construction method of bare concrete wall internally provided with heat insulation layer | |
| CN110000892A (en) | A kind of production technology of prefabricated component stair | |
| CN212613903U (en) | Brick-concrete structure old building body composite reinforcement structure | |
| CN207829511U (en) | A kind of existing building external wall reconstruction structure | |
| CN111501510A (en) | Microcrack repairing process for bridge deck | |
| CN111648256A (en) | Pier body reinforcing construction method | |
| CN110776293A (en) | Oil-seepage-preventing concrete construction method for oil stain collecting tank | |
| CN206623199U (en) | The horizontal mould of concrete list storehouse pipe gallery and system | |
| CN101851899B (en) | H-type prestressed concrete column and production method thereof | |
| CN109763573B (en) | Water stop ridge and construction method thereof | |
| CN106869387A (en) | Multi-ribbed plate Structural Floor System HZ concrete film construction methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181217 Address after: 400 000 Guiyuan 43, Yuzhong District, Chongqing Applicant after: Chongqing Construction Residential Engineering Co., Ltd. Applicant after: Chongqing Construction Engineering Group Co., Ltd. Address before: 400 000 Guiyuan 43, Yuzhong District, Chongqing Applicant before: Chongqing Construction Residential Engineering Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |