CN103821362B - Outstanding beam-and-rail and roofing construction method for synchronously constructing - Google Patents
Outstanding beam-and-rail and roofing construction method for synchronously constructing Download PDFInfo
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- CN103821362B CN103821362B CN201410082284.3A CN201410082284A CN103821362B CN 103821362 B CN103821362 B CN 103821362B CN 201410082284 A CN201410082284 A CN 201410082284A CN 103821362 B CN103821362 B CN 103821362B
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Abstract
The construction method that a kind of outstanding beam-and-rail is synchronous with roofing construction, belong to industrial construction field, it comprises, and scaffold building, outstanding beam-and-rail are in place, roofing construction, when it is characterized in that roofing and roof girder construction, outstanding beam-and-rail is put in place by the scaffold set up, the weight of outstanding beam-and-rail born by scaffold, before roof girder and the maintenance of roofing concrete construction casting thereof, is arranged on roof girder by outstanding beam-and-rail.The present invention adopts and disposablely sets up roofing construction scaffold, and roofing construction and outstanding beam-and-rail once mounting of constructing completes, decrease scaffold repeat set up, achieve outstanding beam-and-rail and facilitate in place, ensure that construction safety, shorten the duration, reduce expense.
Description
Technical field
The invention belongs to industrial construction field, mainly being applicable to chamber height is that more than 3m roofing hangs beam-and-rail installation, particularly individual layer is greater than the installation of the outstanding beam-and-rail of more than 3m, and floor height as little in underground circulation water station pump house, all kinds of pumping plant, large fan room, maintenance amount is greater than the outstanding beam-and-rail crane gear installation etc. of 3m.
Background technology
Single storey industry workshop chamber height is greater than more than 3m and the factory building need installing outstanding beam-and-rail uses extremely general at building surface in big industrial factory, if underground pump station, belt conveyer head, large fan room, maintenance amount are not too large dynamic equipment factory buildings etc.
Adopt the construction technology of routine, its construction sequence is mill building frame construction, and---all round victory scaffold building---bed die of roof girder and roofing is installed, and------------------scaffold of roof girder and roofing is removed, and------in factory building, equipment is installed, and---------install---installing electronic or Chain block---and remove scaffold the middle handing-over of specialty the concrete placings of roof girder and roofing the model sheetinstallat of roof girder and roofing the reinforcing bar binding of roof girder and roofing to adopt crane that outstanding beam-and-rail lifting is also penetrated indoor outdoor to installed height mark to set up scaffold under roof girder in the form removable of roof girder and roofing in the maintenance of roof girder and roofing by outstanding beam-and-rail.
Its construction subject matter is:
(1) scaffold need set up twice.First scaffold is roofing construction service, and second time is for installing outstanding beam-and-rail service.
(2) because must set up outstanding beam-and-rail installation scaffold rear Liftable to hang beam-and-rail, outstanding beam-and-rail penetrates indoor outdoor, and installation difficulty is large.
(3) scaffold that the scaffold steadiness installed for installing outstanding beam-and-rail is not so good as roofing construction is firm.Operating personnel is for following the line of least resistance, and spontaneous makes every effort to minimizing scaffold building density, and security risk is larger.
(4) because scaffold building density is longer, the risk of installing outstanding beam-and-rail is thereon larger.
(5) because outstanding beam-and-rail lifting is 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 install after the installation of civil engineering main body.
(8) costly: secondary sets up scaffold, increase scaffold building expense, task difficulty is large, adds 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 construction method of installation synchronous with roofing.
The present invention includes that scaffold building, outstanding beam-and-rail are in place, roofing construction, when it is characterized in that roofing and roof girder construction, outstanding beam-and-rail is put in place by the scaffold set up, the weight of outstanding beam-and-rail born by scaffold, after roof girder and the maintenance of roofing concrete construction casting thereof, outstanding beam-and-rail is arranged on roof girder.
All round victory scaffold need be set up when described roof girder and roofing construction, support the weight of roofing concrete and reinforcing bar, template.
After scaffold building is good, below 25t crane can be adopted once to lift outstanding beam-and-rail to installation site absolute altitude.
Load before scaffold support roofing construction, and the dead load increasing outstanding beam-and-rail.
Roofing construction is complete, before maintenance possesses stripping and scaffold, under outstanding beam-and-rail is mounted to roof girder.
Roofing construction is complete, and the outstanding corresponding construction of beam-and-rail is complete, only sets up a scaffold.Thus the secondary decreasing scaffold is set up, and ensure that construction safety, save the engineering time, realize outstanding beam-and-rail synchronous with roofing construction, installed for indoor equipment and created conditions.
The present invention is roofing construction scaffold building in factory building, before roofing construction, timely buying, prefabricated outstanding beam-and-rail and hanging node plate, and the comprehensive anticorrosive work brushed outside finish paint, and with crane outstanding beam-and-rail sling and be placed on scaffold, then mounting rail bed die, roofing bed die, kidnapping reinforcing bar, concreting, maintenance, when the concrete curing of roofing civil engineering reaches the intensity possessing and remove scaffold, stripping, then outstanding beam-and-rail gusset plate is installed, and it is in place to hang beam-and-rail by suspension centre on outstanding beam-and-rail gusset plate, 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, then small operation platform is installed thereon, for installing the ready work of crane gear.Finally remove scaffold, carry out check.
Described outstanding beam-and-rail installation process is being constructed with civil engineering crossover process in advance.
The buying prefabricatedly to complete before roofing template construction the latest of the rail of outstanding beam-and-rail, outstanding beam-and-rail steel plate contact, screw rod.
The installation of crane gear can adjust according to arrival situation.Can be clear and definite in Design of Construction Organization, require that owner purchases in advance, after installing crane gear, install for other follow-up equipment and create conditions.
The present invention is when roofing construction completes, and basic synchronization completes the installation of outstanding beam-and-rail, is the condition that subsequent installation is created, and making installation exercise personnel enter job site can equipment very easily in installation room, improves installation effectiveness.
From construction organization, change conventional sequence of construction, decrease construction sequence, only need set up a scaffold, setting up new platform without the need to installing for outstanding beam-and-rail specially, drastically reduce the area consumption and the operating expenses of circulation material.
Because the duration significantly shortens, consequently reduce the circulation material turnaround time such as scaffold, template, fastener, thus reduce circulation material expense.
From construction sequence design, totally decrease the examination number of times that construction participates in proprietor, management side, improve efficiency of construction, accelerate construction speed.
The present invention utilizes civil engineering all round victory scaffold, operating personnel's processing safety is high, decrease the drawback that installation personnel secondary sets up scaffold, decrease scaffold building expense and material turnover expense, meet quality requirement, the duration is short, expense is low target.
Because the type structure is widely used in industrial premises, its promote the use of can significantly the reduction of erection time, reduce flat cost and overhead cost.
The present invention is in the outstanding beam-and-rail of single-storey factory building more than height 5m is installed, and effect is obvious especially, and the outstanding beam-and-rail synchronous with roofing construction is installed and shortened more than at least 30% than the construction period of similar projects, and circulation material expense drops into minimizing 30%.Construction quality meets specification and designing requirement completely, also can create conditions for installation as early as possible, obtain the accreditation of site supervision and owner, obtain good Social and economic benef@.
The present invention can improve further, when setting up the scaffold supporting 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 use as bed die, and it is good that outstanding beam-and-rail gusset plate and split bolt shift to an earlier date welded and installed, the one-shot forming when roofing is built, direct form removal and tear scaffold open after maintenance, thus reduce the activity duration further.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Shown in Fig. 1, technological process of the present invention comprises 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, scaffold is set up under roofing projected area, then outstanding beam-and-rail is lifted to installing lower position, roofing and roof girder bed die are installed again, assembling reinforcement, side form is reinforced, concreting, when maintenance reaches stripping and scaffold condition, stripping, and outstanding beam-and-rail gusset plate is installed, the outstanding beam-and-rail of lifting, crane gear, remove scaffold.
1, basis and frame column construction
Basic earthwork excavation adopts that excavator carries out excavating, check of foundation subsoil, 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 right angle, four turns of conjunctions to clasp, whole connection system for guide rail closes bridging, stay bolt rod member by wooden scaffold floor, little cross bar, leger, vertical rod and the fastener that connects them forms, as structure stress support system and operating platform.
A, scaffold building
Before setting up, narrow examination must be carried out to all scaffolding pole accessories, prohibit the use the underproof bar accessory of specification quality.
Stand on ground vertical rod and add width >=200mm, the chock of thickness >=50mm, backing plate or other rigidity cushion block, the pad area of every root 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.
Escape way is set up in the orientation that need be suitable for outside frame column along with the rising of structure, wide position 1.5m, floor height 2.5 ~ 3.0m, or determines according to outdoor location.Set up defences aquaplane in escape way upper berth, upper people aisle is set up as figure.
B, the scaffold building sequence of operation:
Place bar of longitudinally sweeping the floor, successively to vertical rod at the bottom of the setting of both sides from bight, after bottom is fixing with bar snapping of longitudinally sweeping the floor, the horizontal bar of sweeping the floor of installing, and fix (before fixing vertical rod bottom with vertical rod, messenger wire is answered to guarantee vertical rod verticality), after 3 ~ 4 vertical rods are holded up on every limit, install the first step longitudinally flat bar and horizontal flat bar immediately, after the vertical peaceful bar level of correction vertical rod makes it meet the requirements, fastening bolt is tightened by 40 ~ 60NM moment, the formation framework section of rising extends successively by above-mentioned requirements sets up installation work interlayer cross bar, 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 reliable, and fastener tightens 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 its maximum perpendicular deviate should be controlled simultaneously; Frame is high when being not more than 20m, deviate position 50mm.
(7) horizontal departure of the flat bar of longitudinal steel answers≤1/250, and the horizontal departure value of full frame length is not more than 50mm.
C, set up operation points for attention problem
(1) steel pipe and fastener is forbidden to be used with.
(2) select the steel tube poles of different length to meet stride requirements.
(3) pedestal part, bridging must not arrange delayed more than 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 more than 3KN/m
2.
(2) on frame plate, manpower transport's member dead weight is used to be greater than 2.5KN.
(3) frame plane materiel material is piled up neatly, ensures to go everywhere without any hindrance here.Added personnel are forbidden to run or retreat.
(4) forbid arbitrarily removing rod member.
(5) note oneself and other people safety problem, avoid colliding and junk.
(6) walk escape way up and down, No Climbing, and scaffold is upper and lower.
(7), before per tour operation, first check security situation, note abnormalities, notify at once.
(8) to knock off every day clean-up frame face, forbid downward throwing article.
3, outstanding beam-and-rail lifting
The material making outstanding beam-and-rail used is bull headction, after bull headction arrival, first check whether its straightness accuracy meets code requirement, and carry out employing machine cuts or gas cutting according to design size and carry out blanking, group to, welding, weld inspection, install car stop and other annexes.
Prefabricatedly to complete, carry out derusting by sandblasting, be coated with priming, a finish paint, except last all completes all over other work except finish paint.
Group will conveniently lift size, is generally not more than 12m, when being greater than 12m, bull headction lifting is grouping to the scaffold set up, balanced welding, discontinuous welding to be selected according to the size of bull headction during group pair, 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, and subsequent processing can be arranged after qualified to construct.
According to bull headction Hoisting Position, above bull headction wing plate, weld hanger, facilitate bull headction to lift with levelling; If electric block, electric slip braced structures need be installed, for electrical install creates conditions.
Finally prefabricated group is fixed on scaffold to good bull headction, prevents from toppling over.During conditions being possessed, can by place for outstanding beam-and-rail on the position of actual installation, once mounting puts in place.
4, bed die is installed
On concrete, axis and horizon (bottom elevation pilot measurement is used) is ejected after pillar form removal, and check, unwrapping wire is positioned to center line and absolute altitude, ejects inner edge and the center line of template according to center line given before frame construction and the working drawing line of ink marker, so that model sheetinstallat and correction.
Carry out level measurement work: use level gauge horizontal for building absolute altitude according to the requirement of actual elevation, direct pilot measurement is to model sheetinstallat position.
By the absolute altitude of equipment Pass line adjustment pillar, then mounting rail base plate, and bracing wire is looked for directly, beam base plate answers arch camber, and when 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: levelling in advance bottom template rim, to ensure that template position is correct, prevent spillage bottom template.Along template sideline 1:3 cement mortar screeding.
5, reinforcing bar binding
A, steel bar meter:
Reinforcing bar is at processing place concentrated processing, and vehicle-mounted running delivers to scene, on-the-spot colligation.Vertical transport adopts 25t mobile crane to transport.
Construction technical staff, according to drawing and code requirement, turns over sample to reinforcement drawing, establishment blanking table, material table through examination & verification errorless after, hand over steel bar meter place to process.
During reinforcement detailing; consider the joint style of reinforcing bar; topping size; the factors such as reinforcing bar position; to consider because bending the situation causing the change in length of reinforcing bar with crotch simultaneously; directly according to the measure in drawing, can not strive accomplishing that blanking is accurate, quantity accurate, avoiding repetition, meet site operation requirement in blanking.
Processing staff receives material table, material table is audited, determine the blanking of errorless rear treatment table, process by the principle of " after short after first long, first many less, length collocation, to cut the waste ", shape, the size of steel bar meter must meet layout design and code requirement.
The reinforcing bar processed will be classified, subregion is stacked, and hang up Sign Board, reinforcing bar, when depositing, pads up with flitch or sleeper etc. by reinforcing bar, not directly stacks on the ground.
B, bar connecting
(1), framework beam main tendon diameter is comparatively large, generally adopts flash butt welding connected mode, and joint must meet pertinent regulations requirement.Joint location should avoid beam-ends hoop reinforcement, and to employing equal strength high-quality jointing, same cross section head quantity is no more than 50%.
(2), welding position under Vierendeel girder, pressure zone smaller part should be arranged on, bearing or apart from often connecting across bearing place 1/3 span length, 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.By code requirement sampling inspection.Flash butt welding requires that must not there be transverse cracks joint, must not have obvious burn with electrode contact place rebar surface.
C, reinforcing bar binding
(1), reinforcement cover work must be carried out before reinforcing bar binding, stay and establish topping should support with the reinforcing bar stirrup that design thickness is identical, 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, during Reinforcement employing dual layer arrangement, should the bar dowel of cushion block or diameter >=25mm between two placing of reinforcements, to keep designed distance, the joint (the superimposed place of crotch) of stirrup answers interlaced arrangement on two handling reinforcements.Girder and secondary beam infall, girder reinforcing bar under, frame joint place reinforcing bar intert very dense time, should be specifically noted that the clear distance between the main muscle of top surface of the beam has 30mm, in order to concreting.Reserved constructional column joint bar by Design Requirement Drawing during construction, 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 terminates; check that whether bar gauge, diameter, radical, spacing be correct; particularly to note the position checking 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, after reinforcing bar self-inspection is qualified simultaneously; after declaring management acceptance(check), next procedure can be carried out.
6, template support and reinforcing
Preparation before a, model sheetinstallat:
Template selects steel form or wooden form.When adopting wooden model, in order to ensure that template is firm, adopt split bolt, wear pvc pipe outside split bolt, in length and breadth spacing 600mm, template surface seam adhesive tape is pasted, guarantee the tight not spillage of template seam, formwork reinforcement adopts steel pipe scaffolding, fastener, adjustment support and split bolt to fix.Lumps of wood band is 300mm, adopts 5 × 10 lumps of wood, uses after scraping.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.When 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 detachable template of the position setting height(from bottom) about 800 ~ 1000mm of about 100mm, builds front dismounting, as concrete discharging mouth and the mouth that vibrates, recovers and reinforces after after building this position.
Can carry out after conscientiously will checking absolute altitude and axial location during form assembly, require that formwork bracing system meets the following requirements simultaneously:
(1) shape of structure and component each several part is ensured, the correctness of size and each other position.
(2) ensure that the locus of template is accurate, and can working load be born.
(3) support system should ensure 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.
Its axis, absolute altitude, section should be checked after model sheetinstallat is complete, whether meet designing requirement.
To formwork bracing system, the number of positions of bolt checks, whether meets the designing requirement of template.
Must not damage concrete each position corner angle during form removal, must meet strict compliance with current job specfication and perform when bed die is removed, the intensity that particularly beam is less than the beam of 8m is greater than 75% can form removal, be greater than 8 need reach design strength can form removal.
C, a form removal flow process:
, form removal technique general process scheme: foreign material cleaning-multiple line in design template figure-template assembly-brush release agent-bullets template position control line-mould-levelling or paving adhesive tape-reinforcing bar, pipeline, box, the pre-buried hidden inspection in hole be complete-formwork supporting plate-prop up steel pipe support-adjustment reinforcing template-preliminary examination template and sign-concrete placings-maintenance-inspection concrete strength-form removal application-examination & approval application-form removal-finishing template-brush release agent-finishing template-enter next to circulate.
D, template construction safety requirements:
During model sheetinstallat, conscientiously should carry out trouble free service, following safety requirements should be met:
1) electric wire template set up and the electric tools of use, should adopt effective safety measure.
2) work high above the ground personnel No Climbing template or scaffold etc. is upper and lower, also must not the walking above such as high-level wall top, isolated beam and template thereof.
3) opening part such as reserving hole of template, should add a cover or arrange protective guard, should arrange safety net if desired at hole place.
4), when installing and removing template, stable ascending tool must be adopted, time highly more than 3.5m, must scaffold be set up.During mounting or dismounting construction, except operating personnel, must not stand people below.During 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.
Must provide the product certificate of cement and review report before building concrete, the test report of sand, stone, is building in concrete process, every 100m
3make concrete mark and support test block one group, less than 100m
3time, consider by one group and carry out every layer of form removal natural curing test block.
Before concrete placings, reinforcing bar binding must be checked out through supervising engineer, handle hidden formality, check oneself installing firm situation and each spot size, shape etc. and whether meeting designing requirement of template simultaneously.Reserved position construction operation group of recovering will be checked.
Before building, should 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, clean out and template seam is blocked up.
Every hidden inspection formality should be carried out before concrete placings.Check outside formwork erection situation, also will complete the various raw-material reinspection of concrete, improve relevant measurement instrument, accurately control water/binder ratio, the slump.
Concrete placings layer and section carries out.Generic hierarchical height is 1.25 times of acting radial of vibrator.Maximumly be no more than 500mm.Use internal vibration, the main points such as should to grasp between " fast insert the pull out slowly " corner that first shakes, rear center of percussion.Slotting point is evenly distributed, and pointwise is moved, and order is carried out, and must not leak and shake, owe to shake and cross to shake to accomplish even jolt ramming.The spacing of movement is not more than 1.5 times (being generally 300 ~ 400mm) of vibration radius.The vibrate lower floor that should insert of last layer is about 50mm.Stranding is connect with what eliminate two interlayers.Concrete answers continuous placing.In the process of building, special messenger should be sent to observe template, reinforcing bar, embedded part etc. with or without movement, the situations such as distortion.
The concrete ratio conformed to drawing concrete label that concrete ratio provides according to test room.When 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 making concrete stir, 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 under the standard conditions that relative temperature is in the wet environment of more than 90% or in water, after 28d maintenance, its compressive strength is determined in pressure testing.Test specimen must make at pouring location.Random sampling is answered when making test block.
Concrete finished product maintenance: the maintenance of this engineering adopts heat and moisture preserving maintenance.To within the complete rear 12h of concrete placings, concrete surface is wanted covered with plastic film and watered in time.Post root concrete connects stubble should remove floating stone, rinses well with water, and it is thick first to build the cement mortar 5 ~ 10cm congruent with concrete during concrete placings.
7, maintenance, form removal
Roofing concrete placings is complete, and should be hidden concrete within 12h and water, water at every turn and concrete should be kept to have enough wetting states, the concrete curing time be no less than 14 round the clock.
After maintenance reaches designing requirement, remove roofing template and beam forms.
8, outstanding beam-and-rail gusset plate is installed
First, before possessing gusset plate mounting condition, by design drawing or standard drawing size by drawing and the prefabricated gusset plate of material thickness, split bolt is got out.
After roofing template and beam forms are removed, for outstanding beam-and-rail installs the reserved Chuan Liang hole of gusset plate on cleaning concrete beam, clear up in hole.
On all round victory scaffold, adopt outstanding beam-and-rail special split bolt to be fixed on concrete beam by gusset plate, and install firm, the weld seam do not completed is welded by accredited operating personnel, ensures 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, levelness, the straightness accuracy bottom outstanding beam-and-rail also will be checked in installation process, levelling rear employing stud is fixed, and is fixed on firm for outstanding beam-and-rail at the bottom of concrete roof beam.
10, crane gear is installed
Crane gear is as after the electric hoist inspection of incoming merchandise, mounted outstanding beam-and-rail is utilized by crane gear to be sling by crane gear, rise be raised to certain altitude after, knapsack etc. is assembled on electric block by Design Requirement Drawing, afterwards, integral hoisting is in place, then adopts set bolt to be fixed on by electric block 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 electrically slip and cable simultaneously, connect temporary source, will a dynamic test be carried out to electric work cucurbit, and inspect for acceptance through management and relevant unit, in time finally checking and accepting, change to formal power supply, thus create conditions for follow-up indoor equipment, process Installation.
If electric block floating cargo, after arrival, can set up portable jenny scaffold installing the position of electric hoist, 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.
Crane facility installation, carries out the construction of last one finish paint, checks whether whether other forgetting items complete in addition, after management, owner check and accept, handles examination formality, according to situ time, can handle middle handing over procedure if desired.
11, scaffold is removed
After outstanding beam-and-rail installation, successively remove scaffold, and be transported to assigned address, stack neat.
Claims (1)
1. the construction method that an outstanding beam-and-rail is synchronous with roofing construction, when it is characterized in that roofing and roof girder construction, outstanding beam-and-rail is put in place by the scaffold set up, the weight of outstanding beam-and-rail born by scaffold, after roof girder and the maintenance of roofing concrete construction casting thereof, outstanding beam-and-rail is arranged on roof girder; All round victory scaffold need be set up when described roof girder and roofing construction, support the weight of roofing concrete and reinforcing bar, template; After scaffold building is good, below 25t crane is adopted once to lift to installation site absolute altitude by outstanding beam-and-rail; Load before scaffold support roofing construction, and the dead load increasing outstanding beam-and-rail; Roofing construction is complete, before maintenance possesses stripping and scaffold, under outstanding beam-and-rail is mounted to roof girder; Roofing construction is complete, and the outstanding corresponding construction of beam-and-rail is complete, only sets up a scaffold; The technological process of the construction that described outstanding beam-and-rail is synchronous with roofing construction comprises basis and frame column construction, scaffold building, roofing construction, outstanding beam-and-rail lifting, bed die installations, reinforcing bar binding, template support and reinforcing, concreting, maintenance and form removal, hangs beam-and-rail gusset plate and install, hang that beam-and-rail is installed, crane facility is installed, scaffold is removed;
The described scaffold building sequence of operation is:
Place bar of longitudinally sweeping the floor, successively to vertical rod at the bottom of the setting of both sides from bight, after bottom is fixing with bar snapping of longitudinally sweeping the floor, installing is laterally swept the floor bar fixing with vertical rod, after 3 ~ 4 vertical rods are holded up on every limit, install the first step longitudinally flat bar and horizontal flat bar immediately, after the vertical peaceful bar level of correction vertical rod makes it meet the requirements, fastening bolt is tightened by 40 ~ 60NM moment, the formation framework section of rising extends on request successively sets up installation work interlayer cross bar, and laying scaffold floor and installation work layer railing, foot guard plate are gone along with sb. to guard him; The bottom that described scaffold stands on ground vertical rod arranges width >=200mm, the chock of thickness >=50mm, backing plate or other rigidity cushion block, and the pad area of every root 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; The upper absolute altitude of described scaffold tube is consistent with the end absolute altitude that outstanding beam-and-rail is installed, and it is good that outstanding beam-and-rail gusset plate and split bolt shift to an earlier date welded and installed, the one-shot forming when roofing is built.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082284.3A CN103821362B (en) | 2014-03-07 | 2014-03-07 | Outstanding beam-and-rail and roofing construction method for synchronously constructing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082284.3A CN103821362B (en) | 2014-03-07 | 2014-03-07 | Outstanding beam-and-rail and roofing construction method for synchronously constructing |
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| Publication Number | Publication Date |
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| CN103821362A CN103821362A (en) | 2014-05-28 |
| CN103821362B true CN103821362B (en) | 2015-10-28 |
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| CN201410082284.3A Active CN103821362B (en) | 2014-03-07 | 2014-03-07 | Outstanding beam-and-rail and roofing construction method for synchronously constructing |
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