CN109025291A - A kind of construction method of separate type precast stair - Google Patents
A kind of construction method of separate type precast stair Download PDFInfo
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- CN109025291A CN109025291A CN201810823281.9A CN201810823281A CN109025291A CN 109025291 A CN109025291 A CN 109025291A CN 201810823281 A CN201810823281 A CN 201810823281A CN 109025291 A CN109025291 A CN 109025291A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Abstract
The invention discloses a kind of construction method of separate type precast stair, specific steps include that precast stair drawing Deepen Design, precast stair production and scene are stacked, installation prepares, precast stair lifting is in place, the finished product protection after filleting, grouting maintenance and precast stair installation.A kind of construction method of separate type precast stair provided by the invention; it is easy to operate, safe and reliable; it not only can effectively ensure construction quality; improve lifting efficiency; shorten project duration, reduces project cost, but also the Popularization And Development of fabricated construction, power-assisted country housing industrialization can be driven; energy-saving and emission-reduction and environmental protection are also beneficial to simultaneously, can widely be promoted and applied in assembled architecture field.
Description
Technical field
The invention belongs to technical field of building construction more particularly to a kind of construction methods of separate type precast stair.
Background technique
With the rapid development of our country's economy, the machining accuracy of the rising of labor cost and prefabricated components and quality,
The construction technology and management development of prefabricated assembled construction, especially China's residential housing develop towards industrialization direction
Trend under, the application of prefabrication gradually heats up, and fast-developing situation is presented.Some enterprises produce to push
The paces of industry, modern architecture industry are started in line with the principle to go from the simple to the complex from precast stair, as pilot, realize dress
It is gradually promoted with formula building structure.But at present from most of project feedback from the point of view of precast stair construction technology there are still
Certain problem restricts always the popularization and application of precast stair.Specific manifestation are as follows: (1) the integral prefabricated meeting of large span waist slab
Cause the self weight of monolithic waist slab excessive, the hoist ability of mainstream tower crane crane is limited in current In High-Rise Building Construction, to make
The maximum handling radius for obtaining waist slab is unable to satisfy construction demand.If changing larger model tower crane crane into, though it can expire
Sufficient hoist requirement, virtually will increase certain equipment leasing cost, loses more than gain, this factor seriously constrains precast stair and exists
The popularization and application of construction market.(2) PC stair and cast-in-situ stair platform connection type are mostly high-end fixed-hinged support, low side at present
Hinged-support is slided, that is, described precast stair is connect with cast-in-place waist slab by the bolt being embedded on waist slab ladder beam
The pre-buried positioning of bolt is a big difficulty in work progress, the lifting precision of the subsequent PC stair of accuracy direct relation of positioning
With efficiency.(3) PC stair lifting precision and lifting efficiency (lifting progress) are often inversely proportional, and how to guarantee to lift precision
While improve lifting efficiency be a great problem.
Therefore, how to provide a kind of construction safety, high financial profit, construction quality good and high-efficient precast stair construction
Method is this field technical problem urgently to be resolved.
Summary of the invention
For the problem that precast stair construction effect is bad present in above-mentioned background technique, installation quality is not high, this hair
It is bright to provide a kind of construction method of separate type precast stair, it can effectively realize quick, the safe construction of precast stair, and
Construction quality is good, high-efficient.
The technical solution that the present invention solves technical problem is as follows:
A kind of construction method of separate type precast stair of the present invention, characterized in that include the following steps:
Step 1, precast stair drawing Deepen Design；
Deepen Design is carried out to design drawing before construction, it, will entire prefabricated building using precast stair separate type construction technology
Ladder is divided into two along waist slab plate width direction, and the precast stair after the separation includes the waist slab at middle part and is arranged in waist slab two
The landing at end, the waist slab upper and lower part respectively correspond two pre-buried inner nuts of setting, upper and lower two landings
Upper two precast stair preformed holes of each setting, split is integrated again when precast stair in-site installation after separation, after Deepen Design
Drawing must meet live staircase size and relative positional relationship, various set aside pre-embeddeds and position must be by calculating, it is ensured that peace
It is complete accurate and agree to through designing institute；
Step 2, precast stair production and scene are stacked；
Step 2.1, precast stair carry out quantitative, regularization in factory in advance according to Deepen Design drawing and produce, through detecting
It transports after qualification to scene；
Step 2.2, precast stair are transported to construction site, go through whether every precast stair component has quality to lack
It falls into, the precast stair for having mass defect is replaced, it is ensured that the quality of precast stair；
Step 2.3 stacks place in advance into cure process, and flat manner is taken when stacking in precast stair scene, it is ensured that structure
Part is horizontal, must not have crooked phenomenon, must not be soaked in water, or stacks using layering is horizontal, upper layer and lower layer precast stair it
Between separated with the lumps of wood, precast stair must not be contacted directly, avoided collision and caused surface fracture；
Step 2.4, marching into the arena for precast stair stack place and stack quantity, according to the construction speed feelings in construction site building
Condition carries out planning determination in advance, fully considers convenient for the installation of subsequent stair, avoids that there is a phenomenon where secondary transhipments；
Step 3, installation prepare；
Step 3.1, installation before, need to first work out detailed stair plan for installation and construction, and complete relevant scheme tell somebody what one's real intentions are,
It confides a technological secret, tell somebody what one's real intentions are safely, make the sufficiently clear installation quality requirement of construction management and operator, technical operation main points and construction
Hereafter safety notice can organize subsequent construction；
Step 3.2, according to construction equipment configuring condition in arrangement and method for construction, choose corresponding precast stair installation hoist cable
Tool, and go through Current Collector Sleave, it is ensured that it can be worked normally；
Step 3.3, the concrete construction for completing cast-in-place terraced Liangping platform and the accurate installation of pre-embedded bolt, every race precast stair
Pre-buried four pre-embedded bolts when concreting, carry out the protection to pre-embedded bolt；
Step 3.4 measures and pops up precast stair end and side control line in the predetermined installation site of precast stair, and
The installation control line of pop-up, the absolute altitude of cast-in-place terraced Liangping platform are checked, it is ensured that the side of prefabricated gangboard is away from shear wall sideline
Be reserved with gap, be subsequent finish plaster reserved space, carried out on the cast-in-place terraced Liangping platform in both ends with cement mortar it is levelling, it is levelling
Layer absolute altitude is sure to precise control；
Step 4, precast stair lifting are in place；
Step 4.1 lifts precast stair using tower crane, pre-buried with hanging ring and waist slab upper and lower part respectively
Inner nut connection, then be connected to form each two suspension centres up and down with shackle and each hanging ring, by one end of four lifting ropes and crane hook
It is connected, the other end is connect with upper and lower four suspension centres respectively, and respectively sets a hand connecting on two lifting ropes with lower part suspension centre respectively
Cucurbit is drawn, whether each component suspender of detailed inspection is connected firmly before lifting by crane, and can slowly lift by crane after confirmation is errorless；
Step 4.2 draws bar, cucurbit hoisting method using precast stair lifting, this hanging method is one outstanding with six layer heights
It is primary to choose layer lifting, that is, is needed when lifting across 6 cast-in-place ladder Liang Pingtai, it is preceding to avoid mutually colliding with cast-in-place terraced Liangping platform
Phase changes the angle of waist slab using chain block, reduces waist slab floor projection length, is transported using lean hoisting to operation
Layer top, slightly pause after using chain block adjust waist slab be in horizontality, using 4 lift draw bar be each passed through it is pre-
The precast stair hole to be provided of the landing of stair processed draws each pre-embedded bolt set of the lower part by installation site of bar using lifting
Firmly, then slowly decentralization precast stair is accurately in place forbidden quickly to put suddenly, causes waist slab clashing and breaking to avoid impact force is excessive；
Step 5, filleting, grouting maintenance；
After waist slab correction finishes and passes through by inspection, filleting and grouting material construction are carried out in time, it is flat in stair activity
Extruded sheet is installed at the gap of platform and cast-in-place terraced Liangping platform, precast stair reserving hole is blocked using grouting material stratified watering, is filled
After slurry, it is ensured that plugging surface is smooth, closely knit and smooth, until taking watering insulated curing after grouting material final set immediately；
Step 6, finished product protection；
Using waste plastic template construct precast stair finished product protection device, which includes building
Ladder rung protection board, landing protection board, stair protection side panel and stair step fixed strip, the stair step protection board with
Stair step formation on waist slab is adapted and covers thereon, and the side of waist slab, institute is arranged in the stair protection side panel
It states landing protection board to be arranged on landing, the stair step fixed strip is two, is separately fixed at stair step
On protection board.
As the further improvement of technical solution, when the precast stair is stacked using layering is horizontal, stacks the number of plies and do not surpass
Cross 3 layers.
As the further improvement of technical solution, the specification of the pre-embedded bolt is M16, C grade bolt.
As the further improvement of technical solution, the pre-embedded bolt install when using continuous steel plate punch device carry out essence
Determine position；The continuous steel plate device that punches includes four pieces of evenly distributed square plates, passes through joint angle between adjacent prismatic steel plate
Steel is connected and fixed, and a reserving hole compatible with pre-embedded bolt is arranged at every piece of square plate center.
As the further improvement of technical solution, accurately determine using continuous casing bit when the pre-embedded bolt is installed
Position；The continuous casing bit includes "-" type pole steel tube, which, which is respectively perpendicular, is provided with one
"-" type auxiliary bar steel pipe is evenly arranged with four internal diameters casing compatible with pre-embedded bolt outer diameter on the auxiliary bar steel pipe of the "-" type
Steel pipe.
As the further improvement of technical solution, the side of prefabricated gangboard is reserved away from shear wall sideline in the step 3.4
There is the gap 30mm.
As the further improvement of technical solution, cement mortar used in screed-coat is 1:1 cement bonded sand in the step 3.4
Slurry, strength grade are not less than M15.
As the further improvement of technical solution, hanging ring described in the step 4.1 be M16 hanging ring, it is described unload hang for
6.5TD type, which unloads, to be hung.
As the further improvement of technical solution, in the step 4.2, precast stair is hoisted to 500mm above work surface
Place constantly, adjusts waist slab using chain block after slightly pausing and is in horizontality.
As the further improvement of technical solution, stair step fixed strip width is 100mm in the step 6.
Compared with prior art, the invention has the following advantages:
1, a kind of separate type precast stair construction method provided by the invention, using precast stair separate type construction technology,
, method of fragment installation prefabricated by waist slab fragment greatly reduces the lifting weight of monolithic waist slab, meets current height
Layer construction in mainstream derrick crane lifting weight demands, can in not upgrading current In High-Rise Building Construction mainstream tower crane
The fast hoisting of prefabricated waist slab, save the cost are completed in the case where model, high financial profit has expanded assembled stair significantly
Application range；
2, a kind of separate type precast stair construction method provided by the invention, using pre-embedded bolt placement technology, certainly
The fixed devices of two kinds of pre-embedded bolts (continuous casing bit and continuous steel plate punch device) is made, pre-embedded bolt is greatly improved
Installation qualification rate, and then avoid causing phenomenon of doing over again because bolt horizontal displacement deviation is excessive, improving work efficiency；
3, a kind of separate type precast stair construction method provided by the invention, innovation draw bar using cucurbit lifting and lifting
Technology lifts angle by adjusting waist slab, reduces floor projection length, greatly avoids precast stair in hoisting process and existing
It pours terraced beam collision and causes breakage, the accurate positioning that pole technology is drawn when can accomplish that waist slab is in place by lifting, hence it is evident that improve
Lift efficiency；
4, a kind of separate type precast stair construction method provided by the invention, the finished product protection technology of use can accomplish pair
The comprehensive of precast stair, all standing, totally enclosed finished product protection, protecting effect are good；
5, a kind of separate type precast stair construction method provided by the invention, it is simple and effective, it can ensure precast stair
Installation quality in the case where improve precast stair installation effectiveness.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and specific embodiments:
Fig. 1 is that heretofore described continuous steel plate punches the floor map of device；
Fig. 2 is the floor map of heretofore described continuous casing bit；
Fig. 3 is elevational schematic view when precast stair lifts in the present invention；
Fig. 4 is that the present invention uses lifting to draw construction schematic diagram when bar is positioned；
Fig. 5 is precast stair finished product protection device floor map of the present invention；
Fig. 6 is precast stair finished product protection device elevational schematic view of the present invention；
In figure: 1. square plates, 2. angle cleats, 3. reserving holes, 4. "-" type mobile jib steel pipes, the auxiliary bar steel of 5. "-" types
Pipe, 6. casing steel pipes, 7. waist slabs, 8. hanging rings, 9. lifting ropes, 10. chain blocks, 11. cast-in-place ladder Liang Pingtai, 12. pre-embedded bolts,
13. bar, 14. precast stair hole to be provided, 15. stair step protection boards, 16. landing protection boards, the protection of 17. stair are drawn in lifting
Side plate, 18. tread fixed strips, 19. landings, 20. pre-buried inner nuts, 21. continuous steel plates punch device, and 22. connect
Continuous casing bit.
Specific embodiment
Before not using a kind of construction method of separate type precast stair of the present invention, the waist slab of former precast stair
Width is 1160mm, weight 4.2t, excessive, the energy beyond mainstream tower crane crane in current In High-Rise Building Construction place of being self-possessed
Power range is unable to satisfy construction demand.
As shown in Figures 1 to 6, a kind of construction method of separate type precast stair of the present invention, includes the following steps:
Step 1, precast stair drawing Deepen Design；
Deepen Design is carried out to design drawing before construction, it, will entire prefabricated building using precast stair separate type construction technology
Ladder is divided into two along waist slab plate width direction, and width is reduced to 580mm by 1160mm, and weight is reduced to 2.1t by 4.2t, this point
Precast stair from after includes the waist slab 7 at middle part and is arranged in the landing 19 at 7 both ends of waist slab, on the waist slab 7
Portion and lower part respectively correspond two pre-buried inner nuts 20 of setting, and two precast stairs are respectively arranged on upper and lower two landings 19
Preformed hole 14, split is integrated again when precast stair in-site installation after separation, and the drawing after Deepen Design must meet live building
Size and relative positional relationship between ladder, various reserving holes and built-in fitting and its position must be by calculating, it is ensured that safety and precise
And agree to through designing institute；
Step 2, precast stair production and scene are stacked；
Step 2.1, precast stair carry out quantitative, regularization in factory in advance according to Deepen Design drawing and produce, through in factory
It can be transported to scene after detection is qualified, and the files such as onboard qualified product card and the detection certificate of competency；
Step 2.2, precast stair are transported to construction site, and going through every precast stair component whether there is as outer
The mass defects such as sight, geometric dimension and built-in fitting position, replace the precast stair for having mass defect, it is ensured that precast stair
Quality；
Step 2.3 stacks place in advance into cure process, and flat manner is taken when stacking in precast stair scene, it is ensured that structure
Part is horizontal, must not have crooked phenomenon, must not be soaked in water, if place is limited, can stack using layering is horizontal, upper layer and lower layer
It is separated between precast stair with the lumps of wood, precast stair must not be contacted directly, avoided collision and caused surface fracture, but stack the number of plies not
Easily more than 3 layers, it is not to be exceeded 4 layers；
Step 2.4, marching into the arena for precast stair stack place and stack quantity, should be according to the construction speed in construction site building
Situation carries out planning determination in advance, fully considers convenient for the installation of subsequent stair, avoids there is a phenomenon where secondary transhipment, expense of taking a lot of work
When；
Step 3, installation prepare；
Before step 3.1, installation, it need to be presided over by Project Technical responsible person and first work out detailed stair plan for installation and construction,
And told somebody what one's real intentions are by the relevant scheme of Project Technical personnel completion, confided a technological secret, told somebody what one's real intentions are safely, keep construction management and operator abundant
Installation quality requirement, technical operation main points and construction safety points for attention are specified, subsequent construction hereafter can be organized；
Step 3.2, according to construction equipment configuring condition in arrangement and method for construction, choose corresponding precast stair installation hoist cable
Tool, and goes through Current Collector Sleave, it is ensured that and its working performance is good, for underproof Current Collector Sleave, should forbid live use, and and
Shi Jinhang replacement；
Pre-embedded bolt 12 at step 3.3, the concrete construction for completing cast-in-place terraced Liangping platform 11 and cast-in-place terraced Liangping platform 11
Accurate installation, the pre-embedded bolt 12 select specification for M16, C grade bolt, every pre-buried four pre-embedded bolts 12 of race precast stair,
The accurate positioning of pre-embedded bolt 12 is carried out using continuous casing bit 22 or continuous the steel plate device 21 that punches when installation, it is ensured that
Pre-embedded bolt 12 installs horizontal displacement deviation within the scope of 1mm, when pouring, should also carry out the protection to pre-embedded bolt 12；This
In step, when being accurately positioned using continuous casing bit 22 to pre-embedded bolt 12, the continuous casing bit 22 includes one
Font pole steel tube 4, which, which is respectively perpendicular, is provided with the auxiliary bar steel pipe 5 of a "-" type, the "-" type
Four internal diameters casing steel pipe 6 compatible with 12 outer diameter of pre-embedded bolt, generally, casing steel are evenly arranged on auxiliary bar steel pipe 5
The diameter of pipe 6 is 18mm, and when construction, the auxiliary bar steel pipe 5 of two "-" types in the continuous casing bit 22 is respectively corresponded up and down
Two cast-in-place terraced Liangping platforms 11, by pre-embedded bolt 12 it is pre-buried after, entangled respectively with the casing steel pipe 6 on the auxiliary bar steel pipe 5 of "-" type
A piece pre-embedded bolt 12, and as desired by the middle line of correction "-" type pole steel tube 4, finally determine the connecting sleeve device
22 positions simultaneously fix, and remove the continuous casing bit 22 after concreting and final set, reuse；In this step,
Using continuous steel plate punch device 21 pre-embedded bolt 12 is accurately positioned when, the continuous steel plate device 21 that punches includes equal
Four pieces of square plates 1 of even arrangement are connected and fixed between adjacent prismatic steel plate 1, every piece of square plate by angle cleat 2
One reserving hole 3 compatible with pre-embedded bolt 12 is set at 1 center, and generally, 3 diameter of reserving hole is that 18mm is (pre-buried
The diameter of bolt is 16mm), when construction, the bar construction of pre-embedded bolt 12 and cast-in-place terraced Liangping platform 11 is fixed, will it is described continuously
The punch reserving hole of device 21 of steel plate is respectively sleeved in the outside of pre-embedded bolt 12, after unified absolute altitude, is fixed by nut, complete
At the accurate positioning of pre-embedded bolt 12；
Step 3.4 measures and pops up precast stair end and side control line in the predetermined installation site of precast stair, and
The installation control line of pop-up, the absolute altitude of cast-in-place terraced Liangping platform 11 are checked, it is ensured that the side of prefabricated gangboard is away from shear wall side
Line is reserved with the gap 30mm, is subsequent finish plaster reserved space, on the cast-in-place terraced Liangping platform 11 in both ends with 1:1 cement mortar into
Row is levelling, and strength grade is not less than M15, and screed-coat absolute altitude is sure to precise control；
Step 4, precast stair lifting are in place；
Step 4.1 lifts precast stair using tower crane, uses M16 hanging ring as on hanging ring 8 and waist slab 7 respectively
The connection of the pre-buried inner nut 20 of portion and lower part, then unload to hang with 6.5TD type and be connected to form each two suspension centres up and down with each hanging ring 8, it will
One end of four lifting ropes 9 is connected with crane hook, and the other end is connect with upper and lower four suspension centres respectively, and respectively with lower part suspension centre
It connects and respectively sets a chain block 10 on two lifting ropes 9, the lifting rope 9 can select wirerope, each structure of detailed inspection before lifting by crane
Whether part suspender is connected firmly, and can slowly lift by crane after confirmation is errorless；
Step 4.2 draws bar, cucurbit hoisting method using precast stair lifting, this hanging method is one outstanding with six layer heights
It is primary to choose layer lifting, that is, is needed when lifting across 6 cast-in-place terraced Liangping platforms 11, to avoid precast stair and cast-in-place terraced Liangping platform 11
Mutually collision, early period change the angle of waist slab 7 using chain block 10,7 floor projection length of waist slab are reduced, using inclination
Above hoisting transportation to work layer, when precast stair is located above work surface at 500mm, chain block is utilized after slightly pausing
10 adjusting waist slabs 7 be in horizontality, using 4 lift draw bar 13 be each passed through precast stair landing 19 it is prefabricated
Stair hole to be provided 14 is entangled 12 top of each pre-embedded bolt of installation site using the lower part that bar 13 is drawn in lifting, then slowly decentralization
Precast stair, it is accurate in place, forbid quickly to put suddenly, causes waist slab clashing and breaking to avoid impact force is excessive；
Step 5, filleting, grouting maintenance；
After the correction of waist slab 7 finishes and passes through by inspection, filleting and grouting material construction should be carried out in time, in stair activity
Extruded sheet is installed at the gap of platform 19 and cast-in-place terraced Liangping platform 11, precast stair reserving hole 14 is layered using C40 grouting material
It pours and blocks, in filling process, easy provisions for grouting (funnel-form, upper opening is big, and under shed is small) can be taken, after grouting, really
It is smooth, closely knit and smooth to protect plugging surface, until taking watering insulated curing after grouting material final set immediately；
Step 6, finished product protection；
Using waste plastic template construct precast stair finished product protection device, which includes building
Ladder rung protection board 15, landing protection board 16, stair protection side panel 17 and stair step fixed strip 18, the stair step
Protection board 15 is adapted with the stair step formation on waist slab 7 and covers thereon, and the stair protection side panel 17 is arranged in ladder
The side of section plate 7, the landing protection board 16 are arranged on landing 19, and the stair step fixed strip 18 is two
Item, width 100mm are separately fixed on stair step protection board 15.
This separate type precast stair construction method is easy to operate, safe and reliable, not only can effectively ensure construction quality,
Lifting efficiency is improved, project duration is shortened, reduces project cost, but also fabricated construction, power-assisted country house can be driven
The Popularization And Development of industrialization, while energy-saving and emission-reduction and environmental protection are also beneficial to, it can widely be pushed away in assembled architecture field
Wide application.
The foregoing is merely a prefered embodiment of the invention, but scope of protection of the present invention is not limited thereto, any to be familiar with sheet
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.Therefore, the scope of protection of the present invention shall be subject to the scope of protection defined by the claims.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art of the present technique.
Claims (10)
1. a kind of construction method of separate type precast stair, characterized in that include the following steps:
Step 1, precast stair drawing Deepen Design；
Deepen Design is carried out to design drawing before construction, using precast stair separate type construction technology, by entire precast stair edge
Waist slab plate width direction is divided into two, and the precast stair after the separation includes the waist slab (7) at middle part and is arranged in waist slab (7)
The landing (19) at both ends, waist slab (7) upper and lower part respectively correspond two pre-buried inner nuts (20) of setting, this is upper and lower
Two precast stair preformed holes (14) of each setting on two landings (19), when precast stair in-site installation after separation, spell again
It is integrated, the drawing after Deepen Design must meet live staircase size and relative positional relationship, various set aside pre-embeddeds and position
Setting must be by calculating, it is ensured that safety and precise is simultaneously agreed to through designing institute；
Step 2, precast stair production and scene are stacked；
Step 2.1, precast stair carry out quantitative, regularization in factory in advance according to Deepen Design drawing and produce, qualified through detection
After transport to scene；
Step 2.2, precast stair are transported to construction site, go through whether every precast stair component has mass defect,
The precast stair for having mass defect is replaced, it is ensured that the quality of precast stair；
Step 2.3 stacks place in advance into cure process, and flat manner is taken when stacking in precast stair scene, it is ensured that component water
It is flat, there must not be crooked phenomenon, must not be soaked in water, or be stacked using layering is horizontal, be used between upper layer and lower layer precast stair
The lumps of wood separates, and precast stair must not be contacted directly, avoids collision and causes surface fracture；
Step 2.4, marching into the arena for precast stair stack place and stack quantity, are mentioned according to the construction speed situation in construction site building
Before carry out planning determination, fully consider convenient for the installation of subsequent stair, avoid that there is a phenomenon where secondary transhipments；
Step 3, installation prepare；
Step 3.1, installation before, need to first work out detailed stair plan for installation and construction, and complete relevant scheme tell somebody what one's real intentions are, technology
It tells somebody what one's real intentions are, tell somebody what one's real intentions are safely, make the sufficiently clear installation quality requirement of construction management and operator, technical operation main points and construction safety
Hereafter points for attention can organize subsequent construction；
Step 3.2, according to construction equipment configuring condition in arrangement and method for construction, choose corresponding precast stair installation Current Collector Sleave, and
Go through Current Collector Sleave, it is ensured that it can be worked normally；
Step 3.3, the concrete construction for completing cast-in-place ladder Liang Pingtai (11) and the accurate installation of pre-embedded bolt (12), every race are prefabricated
Stair pre-buried four pre-embedded bolts (12) when concreting, carry out the protection to pre-embedded bolt (12)；
Step 3.4 measures in the predetermined installation site of precast stair and pops up precast stair end and side control line, and to bullet
The absolute altitude of installation control line, cast-in-place ladder Liang Pingtai (11) out is checked, it is ensured that the side of prefabricated gangboard is away from shear wall sideline
Be reserved with gap, be subsequent finish plaster reserved space, carried out on the cast-in-place ladder Liang Pingtai (11) in both ends with cement mortar it is levelling,
Screed-coat absolute altitude is sure to precise control；
Step 4, precast stair lifting are in place；
Step 4.1 lifts precast stair using tower crane, pre- with hanging ring (8) and waist slab (7) upper and lower part respectively
Inner nut (20) connection is buried, then is connected to form each two suspension centres up and down with shackle and each hanging ring (8), by the one of four lifting ropes (9)
End is connected with crane hook, and the other end is connect with upper and lower four suspension centres respectively, and two lifting ropes are being connect with lower part suspension centre respectively
(9) chain block (10) is respectively set on, whether each component suspender of detailed inspection is connected firmly before lifting by crane, can after confirmation is errorless
Slowly lifting；
Step 4.2 draws bar, cucurbit hoisting method using precast stair lifting, this hanging method is with six layer heights for an overhang layer
Lifting is primary, that is, is needed when lifting across 6 cast-in-place ladder Liang Pingtai (11), to avoid mutually touching with cast-in-place ladder Liang Pingtai (11)
It hits, early period changes the angle of waist slab (7) using chain block (10), waist slab (7) floor projection length is reduced, using inclination
Above hoisting transportation to work layer, waist slab (7) are adjusted using chain block (10) after slightly pausing and are in horizontality, are used
The precast stair hole to be provided (14) that bar (13) is each passed through the landing (19) of precast stair is drawn in 4 liftings, is drawn using lifting
Each pre-embedded bolt (12) of installation site is entangled in the lower part of bar (13), then slowly decentralization precast stair, accurate in place, forbids fast
Speed is put suddenly, causes waist slab clashing and breaking to avoid impact force is excessive；
Step 5, filleting, grouting maintenance；
After waist slab (7) correction finishes and passes through by inspection, filleting and grouting material construction are carried out in time, in stair activity platform
(19) and at the gap of cast-in-place ladder Liang Pingtai (11) extruded sheet is installed, precast stair reserving hole (14) is poured using grouting material layering
Encapsulating is stifled, after grouting, it is ensured that plugging surface is smooth, closely knit and smooth, until taking watering insulated curing after grouting material final set immediately；
Step 6, finished product protection；
Using waste plastic template construct precast stair finished product protection device, which includes that stair are stepped on
Walk protection board (15), landing protection board (16), stair protection side panel (17) and stair step fixed strip (18), the stair
Protection board (15) of marking time is adapted and covers thereon, the stair protection side panel with the stair step formation on waist slab (7)
(17) setting is arranged on landing (19) in the side of waist slab (7), the landing protection board (16), the stair
Mark time fixed strip (18) be two, be separately fixed on stair step protection board (15).
2. a kind of construction method of separate type precast stair according to claim 1, characterized in that the precast stair is adopted
When being stacked with layering is horizontal, stacks the number of plies and be no more than 3 layers.
3. a kind of construction method of separate type precast stair according to claim 1, characterized in that the pre-embedded bolt
(12) specification is M16, C grade bolt.
4. a kind of construction method of separate type precast stair according to claim 1, characterized in that the pre-embedded bolt
(12) it is accurately positioned when installing using the continuous steel plate device (21) that punches；The continuous steel plate punches device (21) including equal
Four pieces of square plates (1) of even arrangement are connected and fixed between adjacent prismatic steel plate (1), every piece of side by angle cleat (2)
One and pre-embedded bolt (12) compatible reserving hole (3) are set at shape steel plate (1) center.
5. a kind of construction method of separate type precast stair according to claim 1, characterized in that the pre-embedded bolt
(12) it is accurately positioned when installing using continuous casing bit (22)；The continuous casing bit (22) includes "-" type upright bar
Steel pipe (4), which, which is respectively perpendicular, is provided with the auxiliary bar steel pipe (5) of a "-" type, and the "-" type is auxiliary
Four internal diameters casing steel pipe (6) compatible with pre-embedded bolt (12) outer diameter is evenly arranged on bar steel pipe (5).
6. a kind of construction method of separate type precast stair according to claim 1, characterized in that in the step 3.4
The side of prefabricated gangboard is reserved with the gap 30mm away from shear wall sideline.
7. a kind of construction method of separate type precast stair according to claim 1, characterized in that in the step 3.4
Cement mortar used in screed-coat is 1:1 cement mortar, and strength grade is not less than M15.
8. a kind of construction method of separate type precast stair according to claim 1, characterized in that in the step 4.1
The hanging ring (8) be M16 hanging ring, it is described unload to hang to unload for 6.5TD type hang.
9. a kind of construction method of separate type precast stair according to claim 1, characterized in that in the step 4.2,
Precast stair is hoisted to above work surface at 500mm constantly, is adjusted at waist slab (7) after slightly pausing using chain block (10)
In horizontality.
10. a kind of construction method of separate type precast stair according to claim 1, characterized in that building in the step 6
Ladder rung fixed strip (18) width is 100mm.
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| CN110924568A (en) * | 2019-10-24 | 2020-03-27 | 中天西北建设投资集团有限公司 | Method for constructing stair partition wall by adopting precast concrete hollow wall board |
| CN111335561A (en) * | 2020-03-06 | 2020-06-26 | 吴传江 | Stair installation construction method for fabricated building |
| CN112320611A (en) * | 2020-11-30 | 2021-02-05 | 中建一局集团建设发展有限公司 | Overweight assembled prefabricated staircase hoisting device and construction method |
| CN112412067A (en) * | 2020-11-19 | 2021-02-26 | 中冶建工集团有限公司 | Accurate positioning method for prefabricated staircase |
| CN113700239A (en) * | 2021-08-26 | 2021-11-26 | 中国二十二冶集团有限公司 | Concrete prefabricated staircase and installation and construction method thereof |
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| CN115003893A (en) * | 2020-01-22 | 2022-09-02 | 斯文伯格控股公司 | Load transfer connecting element |
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| CN110924568A (en) * | 2019-10-24 | 2020-03-27 | 中天西北建设投资集团有限公司 | Method for constructing stair partition wall by adopting precast concrete hollow wall board |
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| CN111335561A (en) * | 2020-03-06 | 2020-06-26 | 吴传江 | Stair installation construction method for fabricated building |
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| CN112320611B (en) * | 2020-11-30 | 2023-07-25 | 中建一局集团建设发展有限公司 | Overweight assembled prefabricated stair hoisting device and construction method |
| CN113700239A (en) * | 2021-08-26 | 2021-11-26 | 中国二十二冶集团有限公司 | Concrete prefabricated staircase and installation and construction method thereof |
| CN114033186A (en) * | 2021-12-09 | 2022-02-11 | 中建四局第三建设有限公司 | Construction method of special-shaped prefabricated inclined roof panel |
| CN114250926A (en) * | 2021-12-30 | 2022-03-29 | 杭州江润科技有限公司 | Prefabricated assembled stair and construction method thereof |
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Application publication date: 20181218 |