CN106150001A - A kind of fabricated assembly overall stair construction method - Google Patents
A kind of fabricated assembly overall stair construction method Download PDFInfo
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- CN106150001A CN106150001A CN201510208578.0A CN201510208578A CN106150001A CN 106150001 A CN106150001 A CN 106150001A CN 201510208578 A CN201510208578 A CN 201510208578A CN 106150001 A CN106150001 A CN 106150001A
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Abstract
The present invention relates to a kind of fabricated assembly overall stair construction method, concrete steps include the construction after mould construction, the construction of staircase component ingredient, stair preparatory work before installation, sliding support installation, staircase component installation, staircase component installation.A kind of fabricated assembly overall stair construction method that the present invention provides, the Forming Quality of fabricated assembly overall stair is good, it is not necessary to carrying out secondary decoration, prefabricated fast with installation rate, integrated cost is relatively low, anti-seismic performance good.Promote from overall assembled stair angle, it is achieved assembled architecture application progressively.
Description
Technical field
The present invention relates to a kind of stair construction method, in particular, the present invention relates to be applied to a kind of fabricated assembly overall stair construction method of the realm of building construction.
Background technology
The production of building, for a long time to be constructed to Main Means realization.Architectural industrialization, it is simply that will change into the production of building to be fabricated to main mechanization production.Literally, build and manufacture only the change of one wordThe difference lies in a single word, but imply that the deep reform of building industry.It is to say, build the production of this ancient and special product, by from the traditional mode of Hand Made, turn to the modernization industrial production mode being fabricated to Main Means with factory.Building will really become the industrial products of a kind of modernization, manufacture house and just become a reality as manufacturing automobile.The Construction Practice of the famous buildings such as Hong Kong & Shanghai Banking co, Paris, FRA Peng Pidu cultural center, the industrialization for building have sent the dawn at dawn here.
Building products is different from other industrial products, has individual character and the particularity of distinctness.General industry product is in addition to brand, the name of an article, model, batch etc. principal character, and the product producing same model in enormous quantities is the maximum feature that general industry product is different from building products.The individual character that building products is distinct does not allow the production in enormous quantities being yet not suitable with on ordinary meaning, and society does not admit and the most do not accepts machine-made building.Due to the inherent characteristics of building products, the industrial products that its Industrialization is the most general are difficult.Therefore the Industrialization road built, it is common that from a large amount of property, there is identical serviceability, be easier to abstract classification, easy modular coordination coordinate residential housing from the beginning of, the comprehensive industrialization of building is done step-by-step.It is correct that the experience of developed country is proved this, and the architectural industrialization of China also melts the beginning from housing industry.The housing industryization of current China is also in the stage at the early-stage, we architect is needed to go to concentrate on studies the experience of successful foreign and external industrialized house architectural culture, form industrialized building with Chinese characteristics culture, achieve the building industrialization cause of China.
The status that integrally assembling staircase occupation ratio in housing industry is more important, owing to the size of staircase is unified very well, just provides good chance to fabricated assembly overall stair large-area applications.In the domestic assembled architecture built also first from the beginning of application fabricated assembly overall stair, the current commonly used embedded bar on cast-in-place beam of domestic fabricated assembly overall stair, reserving hole on prefabricated gangboard, gangboard is enclosed within reserved steel bar in reserving hole when installing, water reserving hole after pea gravel concreten by a grade higher than gangboard again, complete the installation of precast stair.Fabricated assembly overall stair are mainly applied more in double race stair, and apply less in cantilever stair.The engineering of domestic application simultaneously, is required for installing, into hoisting prefabricated component, the tower crane that Lifting Capacity is bigger, and tower crane expense is higher by about 30% than conventional project.
Summary of the invention
It is an advantage of the invention to provide a kind of fabricated assembly overall stair construction method, it is achieved that the industrialization of building products especially monoblock type stair produces, beneficially the long-term sustainable development of building trade.
The above-mentioned purpose of the present invention and other purposes solve by the following technical programs:
The present invention provides a kind of fabricated assembly overall stair construction method, it is characterised in that specifically comprise the following steps that
(1) mould construction
1. the assembling of mould
A. use tower crane to be transported to mold base assemble place, platform mould operation platform is arranged on mold base, then erecting bed mould bench typified form；
B. check that stairway die assembles the most firm, tight, according to the situation of inspection, take different measures: there is neglected loading of screw, the most again add on screwed lock；There is gap in mould, uses sealing joint strip or double faced adhesive tape to seal, and adhesive tape does not enter in concrete；Existing exposes at ferrum hole, uses cloth waste or plug plug real, mortar leakage prevention；
C. check the stairway die size after assembling, when there is dimensional discrepancy, then take the mould being completed apart, corrected stairway die is re-assemblied；
2. the cleaning of mould
A. cleaning mold is all before assembling relevant with mixed earth contact surface and with size touches actinal surface, and when having foreign material in finding mould, use high pressure air pressure gun blows off, and bulk foreign material are the most manually sorted out；
B. at stairway die surface brush releasing agent or moulding oil, when there is obvious oil stain die surface local, clean rag is used to wipe clear；
3. the inspection of mould
A., bench steel reinforcement cage close mould is installed, before entering mould, checks model, size, spacing, position, the installation site of protective layer cushion block, check again for the installation site of protective layer, the tightness of tied silk after entering mould, expose the size of ferrum；
B. the model of all built-in fittings, position, size are checked；
(2) staircase component ingredient construction
1. reinforcement construction
A. thickness of protection tier is 20mm, and protective layer interval 600mm, in plum blossom-shaped colligation on outermost layer reinforcing bar, corner location is suitably encrypted；
B. reinforcing bar infall should use tied silk colligation firm, must not jump bundle, and tied silk tail end should not highlight outermost layer rebar surface and point to protective layer direction, all applies finger that tied silk head is pressed inside ferrum cage at every colligation one；
C. framework of steel reinforcement size is accurate, uses four suspension centres, put down gently into mould, prevent skeleton to be deformed during lifting；
D. cover to reinforcement uses plastic cushion, firm with framework of steel reinforcement or mesh sheet colligation, and cushion block is pressed plum blossom-shaped and arranged, center distance 400mm；
E. when framework of steel reinforcement enters mould should straight, not damaged, surface must not have greasy dirt or corrosion, exposed parts reinforcing bar Polypropylence Sheet parcel to prevent from polluting；
F. framework of steel reinforcement answers colligation firm with the pre-buried nail that hangs, and by the pre-buried nail that hangs of design attitude, and position is accurate；
G. built-in fitting construction, including joint bar, bolt, suspender；
2. concrete construction
A. check the mould being completed, check whether mould, built-in fitting etc. have deformation and displacement, remove the foreign material of mould inside；
B. use concrete needed for C30 commerical ready-mixed concrete, cement, aggregate, additive, admixture and water pouring construction, and concrete mix molding temperature is not less than 5 DEG C, and not higher than 35 DEG C；
C. concrete answers placement layer by layer, lift height to be not more than 500mm, and upper layer concrete continuous placing before lower-layer concrete initial set is complete；
D. the cloth shots of concreting is preferably close to casting position, takes to reduce the measure of concrete discharging impact.
E. after concreting, before concrete initial set and before final set, process of respectively concrete exposed surface being wiped one's face.
F. concrete vibrating should use plug-in type vibrating rod or external vibrator, human assistance can be used if desired to vibrate, vibrate respectively according to placement layer by layer thickness, and the front end of vibrating head should be inserted in preceding layer concrete, and insertion depth is not less than 50mm；
G., after staircase component has poured, it need to be carried out steam curing；
H. after staircase component reaches to lift by crane intensity, winch to stockyard water seasoning on time, after intensity reaches the installation strength that design requires, be transported to building site install；
3. the staircase component demoulding
A. should check before staircase component form removal lifting the concrete test block intensity of cured under same condition, mean compressive strength reach more than 15MPa can the demoulding, as mean compressive strength fails to reach 15MPa, then this component need to proceed maintenance；
B., before staircase component lifting, confirm that the coupling part between component and mould is removed completely, it is without exception to hang nail；
C., before staircase component lifting, inspection chain sling, hanging beam, lifting connector are the most complete, safety, without personnel and foreign material on gantry crane rail；
D. staircase component need to lift by crane with hanging beam, adjusts movable lifting point on hanging beam and makes suspension centre distance be consistent with stair Heave Here distance, and the chain angle being hung on same place is less than 60 °, and weight must not pass through directly over people, mould etc.；
E. it is stored in appointed place after staircase component lifting, in order to the concrete surface at reinforcing bar is scrubbed out shearing resistance matsurface；
F. after the demoulding, not affecting structural behaviour, reinforcing bar, the local damage of built-in fitting and the nonconservative scheme of component surface, surface or crack are repaired by available slurry of repairing；
4. staircase component coding
Spray code identification in staircase component side, encoded content includes vendor code, project code, regional code, stair vertical position code, stair class code, stair horizontal level code, sequence numbering；
5. staircase component is stacked and transport
A. staircase component is deposited in the ground through concrete hardening or the natural terrace through artificial treatment, and stowed location is provided with drainage arrangement；
B. when staircase component is stacked and is needed overlapping, solid, smooth flitch or concrete mats pier is used to be separated by staircase, and flitch or concrete mats pier are placed on same vertical line, when staircase component contacts with metal storage rack, more than 1cm thickness rubber is used to be separated with metal storage rack by staircase component；
C. conveying bracket, compartment board and staircase should put into flexible material; the concrete of staircase component application steel wire rope or fixture and bracket binding structural member corner or chain contact site should use pad lining material to protect; variety classes according to product; for preventing product sliding; topple, with bandage, strut, calabash etc., product need to be reinforced；
D., after staircase component is transported to job site, stockyard should be respectively provided with by specification, kind, position used, lifting sequence, in the range of on-the-spot stockyard should be arranged on crane, passage is set between stacking；
(3) stair preparatory work before installation
A. according to construction characteristic, subdivisional work is told somebody what one's real intentions are item by item；
B. carry out staircase component lifting checking computations, including tension reinforcement stress checking calculation, hang nail checking computations, staircase component install time the anglec of rotation calculate；
C. the measurement and positioning before staircase component installation is carried out, between staircase component, below ladder beam face, operating platform is set up in 1m position, every layer arranges at least one pilot measurement vertical control point, every vertical control point of floor over glaze line should be less than 4, control axis is thrown and is surveyed to respective storey, checks throwing survey axis by closed figures on structural plan；
D. before staircase component is installed, eject in the side of staircase component vertical and be horizontally mounted line, vertically be horizontally mounted line and coincide with floor installation site line, before cast-in-place terraced beam installs staircase component, according to vertical control point, the absolute altitude in ladder beam face is checked, according to the control axis of floor, the axial location of cast-in-place ladder beam is checked；
The most strictly controlling wall and the axis shift of ladder beam and perpendicularity between staircase component, axis shift controls within 5mm, and the interlayer degree control of wall mould is in 4mm, and cross section mould inside dimension deviation should control in ± 4mm；
The most strictly control ladder beam face and ladder beam between staircase component and choose the horizontal absolute altitude of ear, tolerance controls within ± 3mm, between staircase component, ladder beam and ladder beam are chosen after ear concreting completes, within ladder beam and ladder beam choose the absolute altitude control ± 5mm in ear face, ladder beam and ladder beam are chosen ear surface smoothness and are controlled in 3mm, carry out levelling with 1:1 cement thin fish rice stone, as the end carries out levelling in designed elevation application 1:1 fish rice stone as carried out picking packing when horizontal absolute altitude is higher than designed elevation；
(4) sliding support is installed
The most first use bladed saw polyfluortetraethylene plate cut into 250mm width, some pieces of 1200mm length, dimensioning on every piece of polyfluortetraethylene plate, with diameter 8mm bit bore；
B. hole-drilled polyfluortetraethylene plate it is placed in the terraced beam in the middle part of staircase component and chooses on ear surface, the position holed polyfluortetraethylene plate with red lead pen again is in beam face and chooses ear face and is marked, then using the electric hammer of diameter 8mm drill bit to hole, drilling depth is 100mm；
C. aerator is used to blow the dust in hole, hole internal pore is filled up with anchoring adhesive, polyfluortetraethylene plate is placed on ladder beam face again, the hole bored on the Kong Yuliang face bored on polyfluortetraethylene plate is consistent, then anchoring adhesive is clamp-oned in hole, finally the rustless steel flat head screw of long for 70mm diameter 4mm is hammered in the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, the anchoring adhesive of plate face extrusion should be wiped to the greatest extent, and with weight, polyfluortetraethylene plate and flat head screw are pushed down, after 24 hours, anchoring adhesive hardening is removed weight again；
(5) the installation of staircase component
nullOn crane hook, chain sling is hung up before handling，Circle in bench is hung and is nailed on mounting hanger simultaneously，Tower crane keeps flat from the flooring of bench stacking 4 bench of field handling to construction layer，Shackle is installed on chain sling and on the suspender of bench，The hook of lifting calabash is hung over unloading of chain sling buckle，And adjust the length of chain block，The shackle on steel wire penetrating suspender，Hang on the suspension hook of lifting calabash，Hanging belt and the stay cord of location of protection are installed in bench，Tower crane lifting bench，And utilize lifting calabash to adjust bench angle，Designated floor it is hoisted in stairwell，Again with lifting calabash, staristep is adjusted the angle to bearing level，Crane hook drops to the installation site of bench，It is finely adjusted with lifting calabash，Control axis according to elevator side is corrected with the installation site crowbar of ladder beam with the installation control pair bench chosen on ear，Bench is installed in place；
(6) the construction after staircase component is installed
The protection of stair finished product
Staircase component install after construction: waste and old template is processed into shape of marking time, stair step is protected, prevent cast-in-place wall, Liang Shi, the pollution that bench is caused, or damage to stair step during transhipment construction material.
Water the construction of landing plate the most afterwards
A. first after water the bed die of armoured concrete slab and complete, then the reserved steel bar of stair bench and the reserved steel bar of Bars In Poured Concrete Slab are first carried out colligation, then weld by single welding 10d, the good distributing reinforcement of colligation；
B. before casting concrete, the joint location of Reinforcement of plate, joint quantity, joint area percentage, weld length are checked, but also to check the quality of concrete matsurface；
C. should install reserved spool before concreting, template carries out moistening simultaneously, bench concrete matsurface brushes one times cement mortar；
The concrete watering armoured concrete slab the most afterwards uses C35 expansive concrete, a grade is improved than original Bars In Poured Concrete Slab concrete grade, tower crane suspension bucket is used to winch to outer body panel during concreting, the position watering plate after concrete being shifted onto landing with handbarrow pours, using internal vibration rod to vibrate concrete, it is floating that artificial twice pair of concrete carries out receiving light simultaneously.
Advantages of the present invention and having the beneficial effects that:
1. a kind of fabricated assembly overall stair construction method that the present invention provides, industrialization degree is higher, the all factories of stair make, in-site installation, stair Forming Quality is good, on-the-spot efficiency of construction is higher, solves cast-in-situ steel reinforced concrete entirety stair speed of application slow, the problem that the level of stair Forming Quality and safety construction is poor, and it is few to expend timber, environmental protection and economy.
2. a kind of fabricated assembly overall stair construction method that the present invention provides, one end of stair is sliding support, the concrete bearing that one end is watered after being, can effectively reduce the concentrated stress that staristep is produced by seismic wave, the problem solving assembled steel reinforced concrete staircase poor seismic behavior.
3. a kind of fabricated assembly overall stair construction method that the present invention provides, the lifting calabash on available suspension hook adjusts the angle of staristep lifting, solves because stairwell is narrow, and bench cannot the problem of handling.
Detailed description of the invention
According to technical scheme, in the case of the connotation not changing the present invention, those of ordinary skill in the art can propose multiple frame modes of the present invention.Therefore technical scheme is simply illustrated by detailed description below, and is not to be construed as the whole of the present invention or is considered as defining or limiting technical solution of the present invention.
The present invention provides a kind of fabricated assembly overall stair construction method, and concrete steps include the construction after mould construction, the construction of staircase component ingredient, stair preparatory work before installation, sliding support installation, staircase component installation, staircase component installation.
Mould construction includes the assembling of mould, the cleaning of mould and the inspection of mould.
Die steel preferably uses Q235 steel to make, and die surface is smooth, smooth, there is not the phenomenon such as cut, rusty stain
The assembling of mould: use tower crane to be transported to mold base assemble place, platform mould operation platform is arranged on mold base, then erecting bed mould bench typified form；Check that stairway die assembles the most firm, tight, according to the situation of inspection, take different measures: there is neglected loading of screw, the most again add on screwed lock；There is gap in mould, uses sealing joint strip or double faced adhesive tape to seal, and adhesive tape does not enter in concrete；Existing exposes at ferrum hole, uses cloth waste or plug plug real, mortar leakage prevention；Check the stairway die size after assembling, when there is dimensional discrepancy, then take the mould being completed apart, corrected stairway die is re-assemblied.
The cleaning of mould: cleaning all and mixed earth contact surface and relevant with size touch actinal surface, having foreign material, need to blow clean with high pressure air pressure gun in finding mould, bulk foreign material need to manually be sorted out；As size is found to have deviation, module refitting need to be taken apart to closing symbol requirement；Mould brush releasing agent or moulding oil to spray, to brush uniformly, and there is obvious oil stain local, wipes clean with clean rag, and polishing is wanted in the place of drain spray brush.
The inspection of mould: checking model, size, spacing, position before entering mould the most correctly, protective layer cushion block is laid the most correct；Check again for after entering mould protective layer whether correct, tied silk is the loosest, exposes ferrum size the most correct；Check all built-in fitting models, position, size, it is ensured that model, position, size are correct.
The construction of staircase component ingredient includes that reinforcement construction, concrete construction, the staircase component demoulding, staircase component coding, staircase component are stacked and transport.
Reinforcement construction: rebar surface not damaged, crackle or rusty stain.
Reinforcing bar outer wall arranges the protective layer that thickness is 20mm, and protective layer interval 600mm, in plum blossom-shaped colligation on outermost layer reinforcing bar, corner location is suitably encrypted.
Reinforcing bar infall should use tied silk colligation firm; bundle must not be jumped; tied silk tail end should not highlight outermost layer rebar surface and point to protective layer direction; all apply finger that tied silk head is pressed inside ferrum cage at every colligation one; the most qualified ferrum cage should be put by appointed place; ferrum cage can stack, but no more than four layers.
Framework of steel reinforcement size is accurate, uses four suspension centres, put down gently into mould, prevent skeleton to be deformed during lifting.
Cover to reinforcement uses plastic cushion, firm with framework of steel reinforcement or mesh sheet colligation, and cushion block is pressed plum blossom-shaped and arranged, center distance 400mm.
When framework of steel reinforcement enters mould should straight, not damaged, surface must not have greasy dirt or corrosion, exposed parts reinforcing bar Polypropylence Sheet parcel to prevent from polluting.
Framework of steel reinforcement answers colligation firm with the pre-buried nail that hangs, and by the pre-buried nail that hangs of design attitude, and position is accurate.
Built-in fitting is constructed, and including joint bar, bolt, suspender, position of center line tolerance is ± 5mm, and protruded length tolerance is+5～0mm, and installing perpendicularity tolerance is 1/40mm.
Concrete construction: check the mould being completed, checks whether mould, built-in fitting etc. have deformation and displacement, removes the foreign material of mould inside.Staircase component uses concrete needed for C30 commerical ready-mixed concrete, cement, aggregate, additive, admixture and water pouring construction, and concrete mix molding temperature is not less than 5 DEG C, and not higher than 35 DEG C.
Concrete answers placement layer by layer, lift height to be not more than 500mm, and upper layer concrete continuous placing before lower-layer concrete initial set is complete.
The cloth shots of concreting preferably close to casting position, takes to reduce the measure of concrete discharging impact.
After concreting, before concrete initial set and before final set, process of respectively concrete exposed surface being wiped one's face.
Concrete vibrating should use plug-in type vibrating rod or external vibrator, human assistance can be used if desired to vibrate, vibrate respectively according to placement layer by layer thickness, and the front end of vibrating head should be inserted in preceding layer concrete, and insertion depth is not less than 50mm；Vibrating head should be perpendicular to concrete surface and insert soon and pull out slowly and uniformly vibrate；When concrete surface without substantially subside, have cement mortar occur, no longer effervescent time, this position should be terminated and vibrate；Vibrating head not should be greater than the 50% of vibrating head operating radius with the distance of template；The slotting dot spacing that vibrates not should be greater than the operating radius 1.4 times of vibrating spear；The maximum gauge that concrete delamination vibrates not should be greater than 1.25 times of vibrating head effect partial-length.
After staircase component has poured, it need to be carried out steam curing.
After staircase component reaches to lift by crane intensity, winch to stockyard water seasoning on time, after intensity reaches the installation strength that design requires, be transported to building site install.
The staircase component demoulding: should check before staircase component form removal lifting the concrete test block intensity of cured under same condition, mean compressive strength reach more than 15MPa can the demoulding, as mean compressive strength fails to reach 15MPa, then this component need to proceed maintenance.
Before staircase component lifting, confirm that the coupling part between component and mould is removed completely, it is without exception to hang nail.
Before staircase component lifting, inspection chain sling, hanging beam, lifting connector are the most complete, safety, without personnel and foreign material on gantry crane rail.
Staircase component need to lift by crane with hanging beam, adjusts movable lifting point on hanging beam and makes suspension centre distance be consistent with stair Heave Here distance, and the chain angle being hung on same place is less than 60 °, and weight must not pass through directly over people, mould etc..
It is stored in appointed place, in order to the concrete surface at reinforcing bar is scrubbed out shearing resistance matsurface after staircase component lifting.
After the demoulding, not affecting structural behaviour, reinforcing bar, the local damage of built-in fitting and the nonconservative scheme of component surface, surface or crack are repaired by available slurry of repairing.
According to different breakage, use respectively and be not less than the special repairing slurry of concrete design strength, epoxy resin slurry, the repairing of special-purpose water-proof slurry；For crack, V-type hole (need to carve to crackle root) is carved out along crack location chisel, wire brush is used to be cleaned out by crackle, avoid oils and fats, dust and loosening stone in crack, crack site is used clear water moistening, allow its air-dried 3min, by the patching material converted along the uniformly brushing one layer of V-type hole, and air-dried 3min；For losing fangle, loose part is first removed clean, by the clear water moistening of losing fangle position with wire brush by losing fangle part, allow its air-dried 3min, patching material is pulled on and need to repair position, it is ensured that all gaps are all filled, and strike off to original size with plaster trowel；For surface pores, moistening of first being sprinkled water in the place that need to repair blemish surface, use patching material to fill to fault location, then plaster trowel smooth out surface is used, after material to be repaired is fully hardened, with sand paper, mend surface is polished smooth, use clear water that patched place is rinsed well.
Staircase component encodes: spray code identification in staircase component side, encoded content includes vendor code, project code, regional code, stair vertical position code, stair class code, stair horizontal level code, sequence numbering.
Staircase component is stacked with transport: staircase component is deposited in the ground through concrete hardening or the natural terrace through artificial treatment, and stowed location is provided with drainage arrangement.Staircase component is stacked when needing overlapping, solid, smooth flitch or concrete mats pier is used to be separated by staircase, and flitch or concrete mats pier are placed on same vertical line, when staircase component contacts with metal storage rack, more than 1cm thickness rubber is used to be separated with metal storage rack by staircase component.Conveying bracket, compartment board and staircase should put into flexible material; the concrete of staircase component application steel wire rope or fixture and bracket binding structural member corner or chain contact site should use pad lining material to protect; variety classes according to product; for preventing product sliding; topple, with bandage, strut, calabash etc., product need to be reinforced.After staircase component is transported to job site, stockyard should be respectively provided with by specification, kind, position used, lifting sequence, in the range of on-the-spot stockyard should be arranged on crane, passage is set between stacking.
Stair preparatory work before installation: according to construction characteristic, subdivisional work is told somebody what one's real intentions are item by item.Carry out staircase component lifting checking computations, including tension reinforcement stress checking calculation, hang nail checking computations, staircase component install time the anglec of rotation calculate.Carry out the measurement and positioning before staircase component installation, between staircase component, below ladder beam face, operating platform is set up in 1m position, every layer arranges at least one pilot measurement vertical control point, every vertical control point of floor over glaze line should be less than 4, control axis is thrown and is surveyed to respective storey, checks throwing survey axis by closed figures on structural plan.Before staircase component is installed, eject in the side of staircase component vertical and be horizontally mounted line, vertically be horizontally mounted line and coincide with floor installation site line, before cast-in-place terraced beam installs staircase component, according to vertical control point, the absolute altitude in ladder beam face is checked, according to the control axis of floor, the axial location of cast-in-place ladder beam is checked.Strict controlling wall and the axis shift of ladder beam and perpendicularity between staircase component, axis shift controls within 5mm, and the interlayer degree control of wall mould is in 4mm, and cross section mould inside dimension deviation should control in ± 4mm.Between strict control staircase component, ladder beam face and ladder beam choose the horizontal absolute altitude of ear, tolerance controls within ± 3mm, between staircase component, ladder beam and ladder beam are chosen after ear concreting completes, within ladder beam and ladder beam choose the absolute altitude control ± 5mm in ear face, ladder beam and ladder beam are chosen ear surface smoothness and are controlled in 3mm, carry out levelling with 1:1 cement thin fish rice stone, as the end carries out levelling in designed elevation application 1:1 fish rice stone as carried out picking packing when horizontal absolute altitude is higher than designed elevation.
Sliding support install: first use bladed saw polyfluortetraethylene plate cut into 250mm width, some pieces of 1200mm length, dimensioning on every piece of polyfluortetraethylene plate, with diameter 8mm bit bore.
Hole-drilled polyfluortetraethylene plate is placed in the terraced beam in the middle part of staircase component and chooses on ear surface, the position holed polyfluortetraethylene plate with red lead pen again is in beam face and chooses ear face and is marked, then using the electric hammer of diameter 8mm drill bit to hole, drilling depth is 100mm.
Aerator is used to blow the dust in hole, hole internal pore is filled up with anchoring adhesive, polyfluortetraethylene plate is placed on ladder beam face again, the hole bored on the Kong Yuliang face bored on polyfluortetraethylene plate is consistent, then anchoring adhesive is clamp-oned in hole, finally the rustless steel flat head screw of long for 70mm diameter 4mm is hammered in the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, the anchoring adhesive of plate face extrusion should be wiped to the greatest extent, and with weight, polyfluortetraethylene plate and flat head screw are pushed down, after 24 hours, anchoring adhesive hardening is removed weight again.
nullThe installation of staircase component: hang up chain sling before handling on crane hook，Circle in bench is hung and is nailed on mounting hanger simultaneously，Tower crane keeps flat from the flooring of bench stacking 4 bench of field handling to construction layer，Shackle is installed on chain sling and on the suspender of bench，The hook of lifting calabash is hung over unloading of chain sling buckle，And adjust the length of chain block，The shackle on steel wire penetrating suspender，Hang on the suspension hook of lifting calabash，Hanging belt and the stay cord of location of protection are installed in bench，Tower crane lifting bench，And utilize lifting calabash to adjust bench angle，Designated floor it is hoisted in stairwell，Again with lifting calabash, staristep is adjusted the angle to bearing level，Crane hook drops to the installation site of bench，It is finely adjusted with lifting calabash，Control axis according to elevator side is corrected with the installation site crowbar of ladder beam with the installation control pair bench chosen on ear，Bench is installed in place.
Staircase component install after construction: waste and old template is processed into shape of marking time, stair step is protected, prevent cast-in-place wall, Liang Shi, the pollution that bench is caused, or damage to stair step during transhipment construction material.
After water the construction of landing plate should first after water the bed die of armoured concrete slab and complete, then the reserved steel bar of stair bench and the reserved steel bar of Bars In Poured Concrete Slab are first carried out colligation, then weld by single welding 10d, the good distributing reinforcement of colligation.Before casting concrete to after water the joint location of Reinforcement of armoured concrete slab, joint quantity, joint area percentage, weld length check, but also to check the quality of bench concrete matsurface.Should install reserved spool before concreting, template carries out moistening simultaneously, bench concrete matsurface brushes one times cement mortar.
After water armoured concrete slab concrete use C35 expansive concrete, a grade is improved than original Bars In Poured Concrete Slab concrete grade, tower crane suspension bucket is used to winch to outer body panel during concreting, the position watering plate after concrete being shifted onto landing with handbarrow pours, using internal vibration rod to vibrate concrete, it is floating that artificial twice pair of concrete carries out receiving light simultaneously.
Claims (1)
1. a fabricated assembly overall stair construction method, it is characterised in that specifically comprise the following steps that
(1) mould construction
1. the assembling of mould
A. use tower crane to be transported to mold base assemble place, platform mould operation platform is arranged on mold base, then erecting bed
Mould bench typified form；
B. check that stairway die assembles the most firm, tight, according to the situation of inspection, take different measures: there is neglected loading of screw,
The most again add on screwed lock；There is gap in mould, uses sealing joint strip or double faced adhesive tape to seal, and adhesive tape does not enter concrete
In；Existing exposes at ferrum hole, uses cloth waste or plug plug real, mortar leakage prevention；
C. check the stairway die size after assembling, when there is dimensional discrepancy, then take the mould being completed apart, by corrected
Stairway die re-assemblies；
2. the cleaning of mould
A. cleaning mold is all before assembling relevant with mixed earth contact surface and with size touches actinal surface, when having foreign material in discovery mould,
Using high pressure air pressure gun to blow off, bulk foreign material are the most manually sorted out；
B. at stairway die surface brush releasing agent or moulding oil, when there is obvious oil stain die surface local, clean rag is used to wipe clear；
3. the inspection of mould
A., bench steel reinforcement cage it is installed and closes mould, before entering mould, checking model, size, spacing, position, the installation position of protective layer cushion block
Put, check again for the installation site of protective layer, the tightness of tied silk after entering mould, expose the size of ferrum；
B. the model of all built-in fittings, position, size are checked；
(2) staircase component ingredient construction
1. reinforcement construction
A. thickness of protection tier is 20mm, protective layer interval 600mm, in plum blossom-shaped colligation on outermost layer reinforcing bar, corner
Location-appropriate is encrypted；
B. reinforcing bar infall should use tied silk colligation firm, must not jump bundle, and tied silk tail end should not highlight outermost layer rebar surface and refer to
To protective layer direction, at every colligation one, all apply finger that tied silk head is pressed inside ferrum cage；
C. framework of steel reinforcement size is accurate, uses four suspension centres, put down gently into mould, prevent skeleton to be deformed during lifting；
D. cover to reinforcement uses plastic cushion, firm with framework of steel reinforcement or mesh sheet colligation, and cushion block press plum blossom-shaped layout, in the heart
Away from 400mm；
E. when framework of steel reinforcement enters mould should straight, not damaged, must not there be greasy dirt or corrosion, exposed parts reinforcing bar Polypropylence Sheet in surface
Parcel prevents from polluting；
F. framework of steel reinforcement answers colligation firm with the pre-buried nail that hangs, and by the pre-buried nail that hangs of design attitude, and position is accurate；
G. built-in fitting construction, including joint bar, bolt, suspender；
2. concrete construction
A. check the mould being completed, check whether mould, built-in fitting etc. have deformation and displacement, remove the foreign material of mould inside；
B. concrete needed for C30 commerical ready-mixed concrete, cement, aggregate, additive, admixture and water pouring construction is used, and mixed
Solidifying soil mixture molding temperature is not less than 5 DEG C, and not higher than 35 DEG C；
C. concrete answers placement layer by layer, lift height to be not more than 500mm, and upper layer concrete waters before lower-layer concrete initial set continuously
Build complete；
D. the cloth shots of concreting is preferably close to casting position, takes to reduce the measure of concrete discharging impact.
E. after concreting, before concrete initial set and before final set, process of respectively concrete exposed surface being wiped one's face.
F. concrete vibrating should use plug-in type vibrating rod or external vibrator, and human assistance can be used if desired to vibrate, according to dividing
Layer pours thickness and vibrates respectively, and the front end of vibrating head should be inserted in preceding layer concrete, and insertion depth is not less than 50mm；
G., after staircase component has poured, its upper surface need to be covered and holding of on time watering is moistening；
H. after staircase component reaches to lift by crane intensity, winching to stockyard water seasoning on time, the installation reaching design requirement in intensity is strong
It is transported to building site after degree install；
3. the staircase component demoulding
A. should check the concrete test block intensity of cured under same condition before staircase component form removal lifting, mean compressive strength reaches 15MPa
More than can the demoulding, as mean compressive strength fails to reach 15MPa, then this component need to proceed maintenance；
B., before staircase component lifting, confirm that the coupling part between component and mould is removed completely, it is without exception to hang nail；
C., before staircase component lifting, inspection chain sling, hanging beam, lifting connector are the most complete, safety, unmanned on gantry crane rail
Member and foreign material；
D. staircase component need to lift by crane with hanging beam, adjusts movable lifting point on hanging beam and makes suspension centre distance be consistent with stair Heave Here distance, hangs
Chain angle in same place is less than 60 °, and weight must not pass through directly over people, mould etc.；
E. it is stored in appointed place after staircase component lifting, in order to the concrete surface at reinforcing bar is scrubbed out shearing resistance matsurface；
F., after the demoulding, structural behaviour, reinforcing bar, the local damage of built-in fitting and the nonconservative scheme of component surface are not affected, available
Repair slurry surface or crack are repaired；
4. staircase component coding
Spray code identification in staircase component side, encoded content includes that vendor code, project code, regional code, stair are perpendicular
To position code, stair class code, stair horizontal level code, sequence numbering；
5. staircase component is stacked and transport
A. staircase component is deposited in the ground through concrete hardening or the natural terrace through artificial treatment, and stowed location is provided with row
Water device；
B., when staircase component is stacked and needed overlapping, solid, smooth flitch or concrete mats pier is used to be separated by staircase, and wood
Side or concrete mats pier are placed on same vertical line, when staircase component contacts with metal storage rack, use more than 1cm thickness
Staircase component is separated by rubber with metal storage rack；
C. conveying bracket, compartment board and staircase should put into flexible material, staircase component application steel wire rope or fixture and bracket colligation
The concrete of component corner or chain contact site should use pad lining material to protect, according to the variety classes of product, for preventing
Product sliding, topples, and need to reinforce product with bandage, strut, lifting calabash etc.；
D., after staircase component is transported to job site, stockyard should be respectively provided with by specification, kind, position used, lifting sequence,
In the range of on-the-spot stockyard should be arranged on crane, passage is set between stacking；
(3) stair preparatory work before installation
A. according to construction characteristic, subdivisional work is told somebody what one's real intentions are item by item；
B. carry out staircase component lifting checking computations, including tension reinforcement stress checking calculation, hang nail checking computations, staircase component install time rotate
Angle calculation；
C. carrying out the measurement and positioning before staircase component installation, between staircase component, below ladder beam face, operating platform is set up, often in 1m position
Layer arranges at least one pilot measurement vertical control point, and the vertical control point of every floor over glaze line should be less than 4, and control axis is thrown and surveyed extremely
After respective storey, structural plan is checked throwing survey axis by closed figures；
D., before staircase component is installed, eject in the side of staircase component vertical and be horizontally mounted line, vertical be horizontally mounted Xian Yu building
Layer installation site line coincides, and before installing staircase component, enters the absolute altitude in ladder beam face according to vertical control point on cast-in-place terraced beam
Row is checked, and checks the axial location of cast-in-place ladder beam according to the control axis of floor；
The most strictly controlling wall and the axis shift of ladder beam and perpendicularity between staircase component, axis shift controls within 5mm, wall mould
Interlayer degree control in 4mm, cross section mould inside dimension deviation should control in ± 4mm；
The most strictly control ladder beam face and ladder beam between staircase component and choose the horizontal absolute altitude of ear, it is allowed to deviation controls within ± 3mm, building
Between ladder component, ladder beam and ladder beam are chosen after ear concreting completes, within ladder beam and ladder beam choose the absolute altitude control ± 5mm in ear face, and ladder
Beam and ladder beam are chosen ear surface smoothness and are controlled in 3mm, as carried out picking to pack using 1:1 water when horizontal absolute altitude is higher than designed elevation
Mud thin fish rice stone carries out levelling, as the end carries out levelling in designed elevation application 1:1 fish rice stone；
(4) sliding support is installed
The most first use bladed saw polyfluortetraethylene plate cut into 250mm width, some pieces of 1200mm length, at every block of politef
Dimensioning on plate, with diameter 8mm bit bore；
B. hole-drilled polyfluortetraethylene plate it is placed in the terraced beam in the middle part of staircase component and chooses on ear surface, then with red lead pen to poly-
The position in tetrafluoroethene twist drill hole is in beam face and chooses ear face and is marked, and then uses the electric hammer of diameter 8mm drill bit to hole,
Drilling depth is 100mm；
C. use aerator to blow the dust in hole, fill up hole internal pore with anchoring adhesive, polyfluortetraethylene plate is placed in again ladder
On beam face, the hole that the Kong Yuliang face that polyfluortetraethylene plate bores is bored is consistent, then anchoring adhesive is clamp-oned in hole, finally 70mm
The rustless steel flat head screw of long diameter 4mm hammers in the hole being drilled, the flat polyfluortetraethylene plate of flat head screw cap, planting of plate face extrusion
Muscle glue should be wiped to the greatest extent, and polyfluortetraethylene plate and flat head screw is pushed down with weight, and after 24 hours, anchoring adhesive hardening moves weight again
Open；
(5) the installation of staircase component
Hanging up chain sling before handling on crane hook, the circle in bench is hung and is nailed on mounting hanger simultaneously, and tower crane stacks field from bench
4 bench of handling keep flat to the flooring of construction layer, install shackle, the extension of lifting calabash on chain sling and on the suspender of bench
It is hooked on unloading of chain sling to buckle, and adjusts the length of lifting calabash, the shackle on steel wire penetrating suspender, hang over lifting calabash
Suspension hook on, in bench install protection hanging belt and location stay cord, tower crane lifting bench, and utilize lifting calabash adjust
Whole bench angle, is hoisted to designated floor in stairwell, again with lifting calabash, staristep is adjusted the angle to bearing level
Degree, crane hook drops to the installation site of bench, is finely adjusted with lifting calabash, the control axis other according to elevator and ladder
Beam is corrected with the installation site crowbar of the installation control pair bench chosen on ear, and bench is installed in place；
(6) the construction after staircase component is installed
1. the protection of stair finished product
A. first after water the bed die of armoured concrete slab and complete, then the reserved steel bar of the reserved steel bar of stair bench and Bars In Poured Concrete Slab first
Carry out colligation, then weld by single welding 10d, the good distributing reinforcement of colligation；
B. long to the joint location of Reinforcement of plate, joint quantity, joint area percentage, welding before casting concrete
Degree checks, but also to check the quality of concrete matsurface；
C. should install reserved spool before concreting, template be carried out moistening simultaneously；
The concrete watering armoured concrete slab the most afterwards uses C35 expansive concrete, improves one than original Bars In Poured Concrete Slab concrete grade
Individual grade, uses tower crane suspension bucket to winch to outer body panel, waters after concrete being shifted onto landing with handbarrow during concreting
The position of plate pours, and uses internal vibration rod to vibrate concrete simultaneously, and artificial twice pair of concrete carries out receiving light
Floating.
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| 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 |
| CN108071239A (en) * | 2017-12-21 | 2018-05-25 | 中冶东北建设（沈阳）工程技术有限公司 | The instant method for implantation of PC stair anchor bars |
| 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 |
| 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 |
| CN110744865A (en) * | 2019-11-01 | 2020-02-04 | 浏阳市龙腾木制品厂 | Measurement mold making method for manufacturing twisted handrail of wood stair |
| 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 |
| 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 |
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| 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 |
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| 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 |
| 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 |
| 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 |
| CN110744865A (en) * | 2019-11-01 | 2020-02-04 | 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 |
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