CN103821362A - Synchronous construction method for constructing suspended rail beam and roof - Google Patents
Synchronous construction method for constructing suspended rail beam and roof Download PDFInfo
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- CN103821362A CN103821362A CN201410082284.3A CN201410082284A CN103821362A CN 103821362 A CN103821362 A CN 103821362A CN 201410082284 A CN201410082284 A CN 201410082284A CN 103821362 A CN103821362 A CN 103821362A
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Abstract
The invention relates to a synchronous construction method for constructing a suspended rail beam and a roof, and belongs to the field of an industrial building. The method comprises the erection of a scaffold, the location of the suspended rail beam, and the construction of the roof. The method is characterized in that when the roof and a roof beam are constructed, the suspended rail beam is placed and located on the erected scaffold, and the weight of the suspended rail beam is born by the scaffold. Before the roof beam and the roof are filled with concrete and are maintained, the suspended rail beam is mounted on the roof beam. The method adopts the scaffold which is used for erecting the roof in one time, the construction of the roof and the construction of the suspended rail beam are completed in one time, the repeated erection of the scaffold is reduced, the convenient location of the suspended rail beam is realized, the safe construction is ensured, the construction time is shortened, and the cost is reduced.
Description
Technical field
The invention belongs to industrial construction field, mainly being applicable to chamber height is that the outstanding beam-and-rail of the above roofing of 3m is installed, particularly individual layer is greater than the 3m installation of outstanding beam-and-rail above, as underground circulation water station pump house, all kinds of pumping plant, large fan room, the little floor height of maintenance amount are greater than the outstanding beam-and-rail crane gear installation etc. of 3m.
Background technology
Single storey industry workshop chamber height be greater than 3m factory building above and that need to install outstanding beam-and-rail use at building surface in big industrial factory extremely general, if underground pump station, belt conveyer head, large fan room, maintenance amount are not too large moving equipment factory buildings etc.
Adopt conventional construction technology, its construction sequence is mill building frame construction, and------bed die of roof girder and roofing is installed, and------template of roof girder and roofing is installed, and---concrete of roof girder and roofing is built, and---------scaffold of roof girder and roofing is removed, and------in factory building, equipment is installed, and------adopt crane will hang beam-and-rail lifts to installed height mark and from outdoor and penetrates that indoor---outstanding beam-and-rail is installed---electronic or Chain block is installed---and removed scaffold the reinforcing bar binding of roof girder and roofing all round victory scaffold building under roof girder, to set up scaffold in handing-over in the middle of specialty in the form removable of roof girder and roofing in the maintenance of roof girder and roofing.
Its construction subject matter is:
(1) scaffold need be set up twice.The first scaffold is roofing construction service, for the second time for outstanding beam-and-rail service is installed.
(2) because must set up outstanding beam-and-rail installs with the outstanding beam-and-rail of scaffold rear Liftable, outstanding beam-and-rail penetrates indoorly from outdoor, and installation difficulty is large.
(3) scaffold that the scaffold steadiness of installing for the outstanding beam-and-rail of installation is not so good as roofing construction is firm.Operating personnel is for following the line of least resistance, and spontaneous making every effort to reduces scaffold building density, and security risk is larger.
(4), because scaffold building density is longer, the risk that outstanding beam-and-rail is installed is thereon larger.
(5) because outstanding beam-and-rail lifts without lifting point, must open hole for hoist at roofing, need local failure roof structure, waterproofing work difficulty is large, very easily occurs drainage.
(6) lifting hole(eyelet) of outstanding beam-and-rail suspension centre is in civil engineering process, and very easily blocked, treatment effeciency is low.
(7) long in time limit, can only after the installation of civil engineering main body, install.
(8) expense is high: secondary is set up scaffold, increases scaffold building expense, and task difficulty is large, has increased labour cost.
Summary of the invention
The invention provides a kind of short construction period, cost-saving, efficiency is high, profitable outstanding beam-and-rail is synchronizeed construction method of installation with roofing.
The present invention includes that scaffold building, outstanding beam-and-rail are in place, roofing construction, while it is characterized in that roofing and roof girder construction, on the scaffold of setting up, will hang beam-and-rail puts in place, scaffold is born the weight of outstanding beam-and-rail, after roof girder and the maintenance of roofing concrete construction casting thereof, will hang beam-and-rail and be arranged on roof girder.
When described roof girder and roofing construction, need set up all round victory scaffold, support the weight of roofing concrete and reinforcing bar, template.
After scaffold building is good, can adopts the following crane of 25t will hang beam-and-rail and once lift to installation site absolute altitude.
Scaffold support the load before roofing construction, and increase the dead load of outstanding beam-and-rail.
Roofing construction is complete, and maintenance possesses before stripping and scaffold, will hang beam-and-rail and be mounted under roof girder.
Roofing construction is complete, and the outstanding corresponding construction of beam-and-rail is complete, only sets up scaffold one time.Thereby the secondary that has reduced scaffold is set up, and has guaranteed construction safety, save the engineering time, realize outstanding beam-and-rail and synchronize with roofing construction, install and created conditions for indoor equipment.
The present invention is roofing construction scaffold building in factory building, before roofing construction, buying in time, prefabricated outstanding beam-and-rail and hanging node plate, and brush the comprehensive anticorrosive work outside finish paint, and will hang beam-and-rail with crane and sling and be placed on scaffold, then mounting rail bed die, roofing bed die, kidnapping reinforcing bar, concreting, maintenance, the concrete curing of roofing civil engineering reaches while possessing the intensity of removing scaffold, stripping, then outstanding beam-and-rail gusset plate is installed, and the outstanding beam-and-rail of naming a person for a particular job by hanging oneself at outstanding beam-and-rail gusset plate is in place, and press standard drawing or designing requirement connect firm, carry out touch-up paint, and install crane gear, if crane gear is not shown up, small operation platform is installed thereon, for the ready work of crane gear is installed.Finally remove scaffold, carry out check.
Described outstanding beam-and-rail installation process is in advance being intersected process construction with civil engineering.
The rail of outstanding beam-and-rail, outstanding beam-and-rail steel plate contact, screw rod buying prefabricated completing before roofing template construction the latest.
The installation of crane gear can be adjusted according to arrival situation.Can be clear and definite in Design of Construction Organization, require owner to purchase in advance, installing after crane gear, install and create conditions for other follow-up equipment.
The present invention is in the time that roofing construction completes, and basic synchronization completes the installation of outstanding beam-and-rail, is the condition that subsequent installation work is created, and makes installation exercise personnel enter the job site equipment in installation room very easily, improves installation effectiveness.
From construction organization, change conventional sequence of construction, reduce construction sequence, only need set up one time scaffold, install and set up new platform for outstanding beam-and-rail without special, significantly reduce consumption and the operating expenses of circulation material.
Because the duration significantly shortens, reduce accordingly the circulation material turnaround time such as scaffold, template, fastener, thereby reduced circulation material expense.
From construction sequence design, totally having reduced constructs participates in the examination number of times of proprietor, management side, has improved efficiency of construction, has accelerated construction speed.
The present invention utilizes civil engineering all round victory scaffold, operating personnel's processing safety is high, reduce installation personnel secondary and set up the drawback of scaffold, reduced scaffold building expense and material turnover expense, met quality requirement, the duration is short, expense is low target.
Because the type structure is widely used in industrial premises, it promotes the use of significantly reduction of erection time, minimizing flat cost and overhead cost.
During the outstanding beam-and-rail of the present invention more than single-storey factory building height 5m installed, effect is obvious especially, and the outstanding beam-and-rail synchronous with roofing construction installed and shortened more than at least 30% than the construction period of similar engineering, and circulation material expense drops into and reduces 30%.Construction quality meets standard and designing requirement completely, also can create conditions for installing as early as possible, obtains site supervision and owner's approval, obtains good society and economic benefit.
The present invention can further improve, in the time setting up the scaffold that supports outstanding beam-and-rail, the upper absolute altitude of scaffold tube is consistent with the end absolute altitude that outstanding beam-and-rail is installed, plan-position registration, it can be used as bed die and uses, and it is good that outstanding beam-and-rail gusset plate and split bolt shift to an earlier date welded and installed, one-shot forming in the time that roofing is built, directly form removal and tear scaffold open after maintenance, thus the activity duration further reduced.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Shown in Fig. 1, technological process of the present invention is to comprise basis and frame column construction, scaffold building, roofing construction, outstanding beam-and-rail lifting, bed die is installed, reinforcing bar binding, template support and reinforcing, concreting, maintenance and form removal, outstanding beam-and-rail gusset plate is installed, outstanding beam-and-rail is installed, crane facility is installed, scaffold is removed, after it is characterized in that basis and frame column have been constructed, under roofing projected area, set up scaffold, then will hang beam-and-rail lifts to lower position is installed, roofing and roof girder bed die are installed again, assembling reinforcement, side form is reinforced, concreting, in the time that maintenance reaches stripping and scaffold condition, stripping, and the outstanding beam-and-rail gusset plate of installation, the outstanding beam-and-rail of lifting, crane gear, remove scaffold.
1, basis and frame column construction
Basic earthwork excavation employing excavator excavates, check of foundation subsoil, and base treatment and smooth, builds blinding concrete.Basis is complete with frame column concreting, possesses roofing construction condition.
2, scaffold building
Scaffold adopts fastener type steel pipe scaffold, scaffold diameter of phi 48 × 3.5, fastener comprises that right angle, four turns and closes clasp, the fastener that whole connection system for guide rail closes bridging, stay bolt rod member by wooden scaffold floor, little cross bar, leger, vertical rod and connects them forms, as structure stress support system and operating platform.
A, scaffold building
Before setting up, must carry out narrow examination to all scaffolding pole accessories, ban use of the underproof bar accessory of specification quality.
Stand on ground vertical rod and add width >=200mm, chock, backing plate or other rigidity cushion block of thickness >=50mm, the pad area of every vertical rod should meet designing requirement, must not be less than 0.5 ㎡.
Scaffold building vertical rod advance 1.2m, vertical rod transfer 1.2m, step pitch 1.5m.Job platform border scaffold floor completely spreads.
Along with escape way is set up in the orientation that the rising of structure need be suitable outside frame column, wide position 1.5m, floor height 2.5～3.0m, or determine according to outdoor location.The escape way upper berth aquaplane of setting up defences, upper people sets up in aisle as figure.
B, the scaffold building sequence of operation:
Place the bar of longitudinally sweeping the floor, from bight successively to vertical rod at the bottom of the setting of both sides, after bottom is fixing with the bar snapping of longitudinally sweeping the floor, install the bar of laterally sweeping the floor, and fix with vertical rod (before fixing vertical rod bottom, answer messenger wire to guarantee vertical rod verticality), hold up after 3～4 vertical rods on every limit, install immediately the longitudinal flat bar of the first step and horizontal flat bar, after the vertical peaceful bar level of correction vertical rod meets the requirements it, tighten fastening bolt by 40～60NM moment, forming the framework section of rising extends successively and sets up installation work interlayer cross bar by above-mentioned requirements, lay scaffold floor and installation work layer railing, foot guard plate is gone along with sb. to guard him.
(1) frame structures meets designing requirement.
(2) node connects reliably, and fastener is tightened torsion apart from reaching 40～60N.M.
(3) vertical rod vertical missing and flat bar horizontal departure meet the requirements.
(4) scaffold floor extension, safety prevention measure meets the requirements.
(5) acceptance of scaffolding and current check meet the requirements.
(6) scaffold upright rod verticality≤1/300, and should control its maximum perpendicular deviate simultaneously; Frame is high while being not more than 20m, deviate position 50mm.
(7) longitudinally the horizontal departure of the flat bar of steel answers≤1/250, and the long horizontal departure value of full frame is not more than 50mm.
C, set up operation points for attention problem
(1) forbid steel pipe and fastener mixed.
(2) select the steel tube poles of different length to meet step pitch requirement.
(3) even column piece, bridging setting must not lag behind and exceed 2 meters.
(4) brace of bridging has at least three roads to be connected with basic rod member.
(5) dock dull and stereotyped scaffold floor, both sides must arrange Inter cross bar.
(6) railing of work layer and foot guard plate should be located at the inner side of vertical rod.
D, the requirement of scaffold operation technique
(1) work layer practice of construction load must not exceed 3KN/m
2.
(2) on frame plate, use manpower transport's member dead weight must not be greater than 2.5KN.
(3) frame plane materiel material is piled up neatly, guarantees to go everywhere without any hindrance here.Forbid added personnel to run or retreat.
(4) forbid arbitrarily removing rod member.
(5) note oneself and other people safety problem, avoid bumping and junk.
(6) walk up and down escape way, No Climbing, and scaffold is upper and lower.
(7) before per tour operation, first check security situation, note abnormalities, notify at once.
(8) the clean-up frame face of knocking off every day, forbids downward throwing article.
3, outstanding beam-and-rail lifting
Making outstanding beam-and-rail material used is bull headction, after bull headction arrival, first check whether its straightness accuracy meets code requirement, and adopt machine cuts or gas cutting to carry out blanking, group to, welding, weld inspection according to design size, install car stop and other annexes.
Prefabricated completing, carries out derusting by sandblasting, is coated with priming, a finish paint, except last all completes all over other work finish paint.
Group will conveniently lift size, is generally not more than 12m, while being greater than 12m, bull headction lifting is grouping to the scaffold of having set up, group to time to select balanced welding, discontinuous welding according to the size of bull headction, reduce welding deformation, guarantee that the straightness accuracy of bull headction meets code requirement.Welding completes, and carries out ultrasound detection according to code requirement butt welded seam, can arrange subsequent processing construction after qualified.
According to bull headction Hoisting Position, above bull headction wing plate, weld hanger, facilitate bull headction lifting and levelling; If electric block, need install electric slip braced structures, for electric installation creates conditions.
Finally prefabricated group is fixed on scaffold good bull headction, prevents from toppling over.When conditions being possessed, can be by place on the position of actual installation outstanding beam-and-rail, once mounting puts in place.
4, bed die is installed
After pillar form removal, on concrete, eject axis and horizon (bottom elevation pilot measurement is used), and check, center line and absolute altitude are positioned to unwrapping wire, eject inner edge and the center line of template according to center line given before frame construction and working drawing with the line of ink marker, so that template is installed and proofreaied and correct.
Carry out level measurement work: use level gauge is horizontal building absolute altitude according to the requirement of actual elevation, and directly pilot measurement is to template installation site.
Press equipment absolute altitude and adjust the absolute altitude of pillar, then mounting rail base plate, and bracing wire is looked for directly, and beam base plate is answered arch camber, and in the time that beam span is equal to or greater than 4m, beam base plate is by designing requirement arch camber, and as design no requirement (NR), springing height is preferably the l/300 of full span length's degree.
Carry out levelling work: the bottom levelling in advance of template rim, to guarantee that template position is correct, prevents template bottom spillage.Along template sideline 1:3 cement mortar screeding.
5, reinforcing bar binding
A, reinforcing bar processing:
Reinforcing bar is concentrated processing in processing place, and vehicle-mounted running is delivered to scene, on-the-spot colligation.Vertical transport adopts 25t mobile crane to transport.
Construction technical staff, according to drawing and code requirement, is turned over sample to reinforcement drawing, establishment blanking table, material table through audit errorless after, hand over reinforcing bar processing place to process.
When reinforcement detailing; consider the joint style of reinforcing bar; topping size; the factors such as reinforcing bar position; to consider to cause because of bending and crotch the situation of the change in length of reinforcing bar simultaneously; can not be directly according to the size blanking in drawing in blanking, strive accomplishing that blanking is accurate, quantity accurate, avoid repetition, meet site operation requirement.
Processing staff receives material table, material table is examined, determine the blanking of errorless rear treatment table, process by the principle of " after short after first long, first many less, length collocation, cut the waste ", shape, the size of reinforcing bar processing must meet layout design and code requirement.
The reinforcing bar processing will be classified, subregion is stacked, and hangs up Sign Board, and reinforcing bar, in the time depositing, pads up reinforcing bar with flitch or sleeper etc., not directly stacks on the ground.
B, reinforcing bar connect
(1), framework beam main tendon diameter is larger, generally adopts flash butt welding connected mode, joint must meet pertinent regulations requirement.Joint location should be avoided beam-ends hoop reinforcement, and to adopting equal strength high-quality jointing, a same cross section quantity should not exceed 50%.
(2), welding position under Vierendeel girder, should be arranged on pressure zone smaller part, bearing or apart from often connecting across 1/3 span length of bearing place, upper iron connects at span centre 1/3 place.With cross section joint rate < 50%.
(3) the main muscle, to Vierendeel girder, adopts flash butt welding to weld with the two-sided overlap welding mode of combining.Welding personnel should be taken appointment with certificate.Press code requirement sampling inspection.Flash butt welding requires joint must not have transverse cracks, must not have obvious burn with electrode contact place rebar surface.
C, reinforcing bar binding
(1), must carry out reinforcement cover work before reinforcing bar binding, stay and establish topping and should support with the identical reinforcing bar stirrup of design thickness, reinforcing bar is paved or colligation on reinforcing bar.
(2), Vierendeel girder reinforcing bar binding:
Beam steel connects employing flash butt welding connection and is connected with overlap welding, when Reinforcement adopts dual layer arrangement, should cushion block between two placing of reinforcements or the bar dowel of diameter >=25mm, to keep designed distance, the joint of stirrup (the superimposed place of crotch) answers interlaced arrangement on two handling reinforcements.Girder and secondary beam infall, girder reinforcing bar under, frame joint place reinforcing bar interts when very dense, should be specifically noted that the clear distance between the main muscle of top surface of the beam has 30mm, in order to concreting.When construction, press the reserved good constructional column joint bar of Design Requirement Drawing, 500mm in beam is stretched in constructional column muscle bottom, and top anchors into 500mm in back timber.
(3), the examination of reinforced bar engineering:
Reinforcing bar binding finishes; check that whether bar gauge, diameter, radical, spacing be correct; particularly to note checking the position of negative muscle, check the position of bar splice and set up, whether anchorage length conform with the regulations, whether concrete cover meets designing requirement; check that whether reinforcing bar binding is firm; have non-loosening metaboly, the allowable variation of reinforcement location also should meet regulation and stipulation simultaneously, after reinforcing bar self check is qualified; declare after management acceptance(check), can carry out next procedure.
6, template support and reinforcing
A, template preparatory work before installation:
Template is selected steel form or wooden form.While adopting wooden model, firm in order to guarantee template, adopt split bolt, split bolt is worn pvc pipe outward, spacing 600mm in length and breadth, and template surface seam is pasted with adhesive tape, guarantee tightly spillage not of template seam, formwork reinforcement adopts steel pipe scaffolding, fastener, adjusting support and split bolt to fix.Lumps of wood band is 300mm, adopts 5 × 10 lumps of wood, after scraping, uses.Split bolt pad adopts 10mm steel plate.Split bolt adopts M12, and landing slab and beam adopt 50 × 50 lumps of wood to make keel.Spacing 300mm lays.While adopting punching block, template is smooth, and form joint place adopts sealant tape to paste.
No matter adopt wooden form or steel form, on every layer of beam, the approximately detachable template of 800～1000mm of the position setting height(from bottom) of about 100mm, builds front dismounting, as concrete discharging mouth and the mouth that vibrates, recovers and reinforces after building behind this position.
After will conscientiously checking absolute altitude and axial location when form assembly, can carry out, require formwork bracing system to meet the following requirements simultaneously:
(1) shape of assurance structure and member each several part, size and the each other correctness of position.
(2) locus of assurance template is accurate, and can bear working load.
(3) support system should guarantee enough rigidity, strength and stability, indeformable under working load effect, does not destroy.
B, formwork erection are installed:
Template, by design size matching board, from down to up, from outside to inside, is installed in proper order.
Pillar must be stablized, installation level in time and shearing support.
After template installs, should check its axis, absolute altitude, section, whether meet designing requirement.
To formwork bracing system, the number of positions of bolt checks whether meet the designing requirement of template.
When form removal, must not damage the each position of concrete corner angle, bed die must meet in strict accordance with existing job specfication and carry out while dismounting, and the intensity that particularly beam is less than the beam of 8m is greater than 75% can form removal, and being greater than 8 the design strength that need to reach can form removal.
C, a form removal flow process:
, form removal technique general process scheme: in design template figure-template assembly-brush release agent-bullets template position control line-mould foreign material cleaning-multiple line-levelling or spread adhesive tape-reinforcing bar, pipeline, box, the pre-buried hidden inspection in hole complete-next circulation of formwork supporting plate-prop up also signature-concrete build-maintenance-check concrete strength-form removal application of steel pipe support-adjustment reinforcing template-preliminary examination template-examine application-form removal-finishing template-brush release agent-finishing template-enter.
D, template construction safety requirements:
When template is installed, trouble free service should be conscientiously carried out, following safety requirements should be met:
1) electric wire setting up in template and the electric tools of use, should adopt effective safety measure.
2) work high above the ground personnel No Climbing template or scaffold etc. are upper and lower, also must not high-level wall top, the walking above such as isolated beam and template thereof.
3) opening part such as reserving hole of template, should add a cover or arrange protective guard, should safety net be set at hole place if desired.
4) while installing and removing template, stable ascending tool must be adopted, while highly exceeding 3.5m, scaffold must be set up.When mounting or dismounting construction, except operating personnel, people below must not stand.When high-rise working, operating personnel should hang up safety belt.
7, concreting
Roofing and roof girder concrete adopt pumping concrete, and one-time-concreting completes.
The product certificate of cement must be provided before building concrete and review report, the test report of sand, stone, building in concrete process, every 100m
3make concrete mark and support one group of test block, not enough 100m
3time, consider and carry out every layer of form removal natural curing test block by one group.
Before concrete is built, must check out reinforcing bar binding through supervising engineer, handle hidden formality, check oneself the firm situation of installing of template and each spot size, shape etc. simultaneously and whether meet designing requirement.The reserved position construction operation group of recovering will be checked.
Before building, should be by the rubbish in template, the cleaning oil pollution on foreign material reinforcing bar is clean, checks whether each position topping pads, and then waters and makes template moistening, and clean out and template seam are blocked up.
Concrete should be carried out every hidden inspection formality before building.Check outside formwork erection situation, also will complete the various raw-material reinspections of concrete, improve relevant measurement instrument, accurately control water/binder ratio, the slump.
Concrete is built layer and section and is carried out.Generic hierarchical height is 1.25 times of acting radial of vibrator.Maximum is no more than 500mm.Use internal vibration, should grasp " fast insert pull out slowly " main points such as first shake between four jiaos, rear center of percussion.Slotting point is evenly distributed, and pointwise is moved, and order is carried out, and must not leak and shake, and owes to shake and crosses to shake and accomplish even jolt ramming.Mobile spacing is not more than 1.5 times (being generally 300～400mm) of vibration radius.What vibrate last layer should insert the about 50mm of lower floor.To eliminate the stranding that connects of two interlayers.Concrete is answered continuous placing.In the process of building, should send special messenger to observe template, reinforcing bar, the situation such as embedded part etc. have or not movement, distortion.
The concrete match ratio conforming to drawing concrete label that concrete match ratio provides according to test room.While running into the rainy day, the water content in sandstone should be deducted.Loading sequence: stone → cement → sand; During if any additive, should add in the lump with cement; Pulverulent Admixture adds in the lump with cement, and liquid adds with water simultaneously.
For concrete is stirred, mixing time must not be less than for 90 seconds.
The making of concrete test block and finished product maintenance.
Concrete test block: concrete reference block should be 100 × 100 × 100 ㎜ is 20 ± 3 in temperature
0with relative temperature be under the standard conditions in more than 90% wet environment or in water, after 28d maintenance, its compressive strength is determined in pressure testing.Test specimen must be made at pouring location.While making test block, answer random sampling.
Concrete finished product maintenance: the maintenance of this engineering adopts heat and moisture preserving maintenance.Concrete has been built to rear 12h to be wanted covered with plastic film and waters in time concrete surface with interior.Post root concrete connects stubble should remove unsteady stone, and water is rinsed well, first builds the cement mortar 5～10cm congruent with concrete thick when concrete is built.
7, maintenance, form removal
Roofing concrete is built complete, should in 12h, be hidden concrete and water, and waters at every turn and should keep concrete to have enough wetting states, and the concrete curing time is no less than 14 round the clock.
Maintenance reaches after designing requirement, removes roofing template and beam forms.
8, outstanding beam-and-rail gusset plate is installed
First possessing before gusset plate mounting condition, by design drawing or standard drawing size and the prefabricated gusset plate of material thickness by drawing, be ready to split bolt.
After roofing template and beam forms are removed, on cleaning concrete beam, for outstanding beam-and-rail, the reserved Chuan Liang hole of gusset plate is installed, will in hole, clears up.
On all round victory scaffold, adopt the outstanding special split bolt of beam-and-rail that gusset plate is fixed on concrete beam, and install firmly, uncompleted weld seam is welded by accredited operating personnel, guarantee weldquality.
9, outstanding beam-and-rail is installed
By the instrument such as crowbar or jack, outstanding beam-and-rail position is finely tuned, outstanding beam-and-rail is connected smoothly with mounted gusset plate, simultaneously, in installation process, also to check levelness, the straightness accuracy of outstanding beam-and-rail bottom, after levelling, adopt stud to fix, at the bottom of hanging that beam-and-rail is firm and being fixed on concrete roof beam.
10, crane gear is installed
Crane gear as the electric hoist inspection of incoming merchandise after, utilize mounted outstanding beam-and-rail that crane gear is sling crane gear, rise be raised to after certain altitude, knapsack etc. is assembled on electric block by Design Requirement Drawing, afterwards, integral hoisting is in place, then adopts set bolt that electric block is fixed on outstanding beam-and-rail, concrete technical requirements and allowable variation, should meet equipment installation requirement and crane gear code for erection and inspection.Lay electric slip and cable simultaneously, connected temporary source, will carry out a dynamic test to electric work cucurbit, and inspected for acceptance through management and relevant unit, in the time finally checking and accepting, changed to formal power supply, thereby be that follow-up indoor equipment, process Installation create conditions.
If electric block floating cargo, after arrival, can be set up portable jenny scaffold the position of electric hoist is installed, operating personnel can hang safety belt on outstanding beam-and-rail, carries out installation and the wiring operation of electrician cucurbit, easy construction and can guarantee job safety.
Whether whether crane facility installation, carries out the construction of last one finish paint, check and also have other omission projects to complete, after management, owner check and accept, to handle examination formality, according to on-the-spot time, handing over procedure in the middle of can handling if desired.
11, scaffold is removed
After outstanding beam-and-rail installation, successively remove scaffold, and be transported to assigned address, stack neat.
Claims (10)
1. the construction method that outstanding beam-and-rail is synchronizeed with roofing construction, while it is characterized in that roofing and roof girder construction, on the scaffold of setting up, will hang beam-and-rail puts in place, scaffold is born the weight of outstanding beam-and-rail, after roof girder and the maintenance of roofing concrete construction casting thereof, will hang beam-and-rail and be arranged on roof girder.
2. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, need set up all round victory scaffold while it is characterized in that described roof girder and roofing construction, supports the weight of roofing concrete and reinforcing bar, template.
3. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, after it is characterized in that scaffold building is good, can adopt the following crane of 25t will hang beam-and-rail and once lift to installation site absolute altitude.
4. the outstanding beam-and-rail of one according to claim 2 and roofing construction method for synchronously constructing, the load before roofing construction that it is characterized in that scaffold support, and increase the dead load that hangs beam-and-rail.
5. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, is characterized in that roofing construction is complete, and maintenance possesses before stripping and scaffold, will hang beam-and-rail and be mounted under roof girder.
6. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, is characterized in that roofing construction is complete, and the outstanding corresponding construction of beam-and-rail is complete, only sets up scaffold one time.
7. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, it is characterized in that technological process be comprise that basis and frame column construction, scaffold building, roofing construction, outstanding beam-and-rail lifting, bed die installation, reinforcing bar binding, template support are installed with reinforcing, concreting, maintenance and form removal, outstanding beam-and-rail gusset plate, outstanding beam-and-rail installation, crane facility installation, scaffold dismounting.
8. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, is characterized in that the described scaffold building sequence of operation is:
Place the bar of longitudinally sweeping the floor, from bight successively to vertical rod at the bottom of the setting of both sides, after bottom is fixing with the bar snapping of longitudinally sweeping the floor, laterally sweep the floor bar fixing with vertical rod of installing, hold up after 3～4 vertical rods on every limit, install immediately the longitudinal flat bar of the first step and horizontal flat bar, after the vertical peaceful bar level of correction vertical rod meets the requirements it, tighten fastening bolt by 40～60NM moment, form the framework section of rising and extend and set up installation work interlayer cross bar successively on request, lay scaffold floor and installation work layer railing, foot guard plate and go along with sb. to guard him.
9. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, it is characterized in that the bottom that described scaffold stands on ground vertical rod arranges width >=200mm, chock, backing plate or other rigidity cushion block of thickness >=50mm, the pad area of every vertical rod must not be less than 0.5 ㎡;
Scaffold building vertical rod advance is 1.2m, and vertical rod transfer is 1.2m, and step pitch is 1.5m.
10. the outstanding beam-and-rail of one according to claim 1 and roofing construction method for synchronously constructing, the upper absolute altitude that it is characterized in that described scaffold scaffold tube is consistent with the end absolute altitude of outstanding beam-and-rail installation, it is good that outstanding beam-and-rail gusset plate and split bolt shift to an earlier date welded and installed, one-shot forming in the time that roofing is built.
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