CN100545363C - Structure conversion layer type steel concrete girder mould suspension construction method - Google Patents
Structure conversion layer type steel concrete girder mould suspension construction method Download PDFInfo
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- CN100545363C CN100545363C CNB2007100681455A CN200710068145A CN100545363C CN 100545363 C CN100545363 C CN 100545363C CN B2007100681455 A CNB2007100681455 A CN B2007100681455A CN 200710068145 A CN200710068145 A CN 200710068145A CN 100545363 C CN100545363 C CN 100545363C
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Abstract
The invention discloses a kind of structure conversion layer type steel concrete girder mould suspension construction method.Comprise the steps: 1) on the design attitude with section steel beam on-site hoisting steel reinforced concrete crossbeam in the structural transition layer; 2) under the steel reinforced concrete crossbeam, set up falsework, and on falsework lay square steel, the lumps of wood, beam bottom board plate successively; 3) hang the U-shaped peg on section steel beam, and peg is passed beam bottom board plate, the lumps of wood, the square steel that is laid on the falsework successively, square steel is fixed with nut; 4) absolute altitude and the level of utilizing the nut of peg bottom to regulate the beam bottom board plate after finishing fixed the reinforcing bar spot welding of peg and beam; 5) progressive type steel concrete beam sides template and mutually the reply wear screw rod installation, remove falsework then, finish the after-pouring concrete.The present invention can reduce conversion layer bottom bearing frame load significantly, and economical with materials and set up has manually been avoided owing to setting up construction safety risk and the claim for eot that heavily loaded high carriage brings, for engineering construction provides safeguard smoothly.
Description
Technical field
The present invention relates to job practices, relate in particular to a kind of structure conversion layer type steel concrete girder mould suspension construction method.
Background technology
Along with the development of construction technique and increasing of building function requirement, the type of construction of large space, multiple variation has proposed requirements at the higher level to structural bearing and seismic design.Steel reinforced concrete beam type structural transition layer is to use more Structure Conversion pattern at present.
Shaped steel concrete structure is comparatively advanced at present structural system, it with steel work intensity height, ductility is good and concrete structure good rigidity, advantages that unit price is low are got up, can effectively improve bearing capacity, reduce the member cross dimensions, improve anti-earthquake ductility, satisfy construction function request.
Common conversion layer beam slab construction technology process: high-altitude operation platform or formwork-support are set up (the bottom floor is suitably reinforced) → reinforced concrete beam board bed die laying → beam muscle colligation → beam envelope side form → plate muscle colligation → envelope mould → concrete and are watered and smash.
Shaped steel concrete beam section is big, load heavy (as 900 * 2500 about 58.5kN/m of line load that cut section bar), span are big, and its formwork system must be safe and reliable, and the while can ensure the quality of products again.The design of construction period bottom load-bearing bracing frame and to set up be the bigger problem of time and effort consuming and risk all the time.
Shaped steel concrete conversion layer construction relates to specialties such as Steel Structure Installation, scaffold, template, reinforcing bar, and with the conventional civil engineering conversion layer difference to some extent of constructing, the definite smooth linking of each specialty and operating space of follow-up specialty of concerning of its technological process seems extremely important.
Summary of the invention
The purpose of this invention is to provide a kind of structure conversion layer type steel concrete girder mould suspension construction method.
Comprise the steps:
1) on the design attitude with section steel beam on-site hoisting steel reinforced concrete crossbeam in the structural transition layer;
2) under structural transition layer steel reinforced concrete crossbeam, set up falsework, and on falsework lay square steel, the lumps of wood, beam bottom board plate successively;
3) hang the U-shaped peg on section steel beam, and peg is passed beam bottom board plate, the lumps of wood, the square steel that is laid on the falsework successively, square steel is fixed with nut, carries out the reinforcing bar binding of girder with rolled steel section en cased in concrete at the same time;
4) absolute altitude and the level of utilizing the nut of peg bottom to regulate the beam bottom board plate after finishing fixed the reinforcing bar spot welding of peg and beam;
5) progressive type steel concrete beam sides template and mutually the reply wear screw rod installation, remove falsework then, finish the after-pouring concrete.
The beneficial effect that the present invention has
For the conversion layer structure construction, traditional job practices all needs to set up the stronger support platform of supporting capacity.Conversion layer is as being in the high-altitude, when interim high-altitude operation platform is considered in the bottom, consider to bear shaped steel concrete crossbeam construction load as need, then the member model of operation platform and sectional dimension all need to improve greatly, even may make operation platform not have advantage aspect economy.Shaped steel concrete crossbeam line load generally about 30～65kN/m, designs the bottom bearing frame thus, and general vertical pole ' s span all about 400～500, goes on foot about high 1.5m, needs intensive level and vertical bridging in addition.And the supporting capacity that is limited to the bottom floor also needs to reinforce layer by layer downwards, even until base plate, the reinforcing amount of Zeng Jiaing, circulation material occupancy and set up manually all greatlyyer thus, and the support body security risk is bigger, and is also influential to programming.Especially in the construction of shaped steel concrete girder structure conversion layer, owing to need be installation arrangement transportation by lighter, lifting place and the time of shaped steel crossbeam, expense input and duration influence also will increase.The present invention analyzes the load of shaped steel concrete girder structure conversion layer, employing utilizes the thinking that section steel beam bears beam self load in the shaped steel concrete beam, promptly after the section steel beam installation, vertical hanger bolt supports big beam bottom board, and other establishes wearing bolt drawknot side form.Utilize this method, the conversion layer bottom need not intensive bearing frame, only need consider handling frame, can reduce bottom bearing frame load significantly, economical with materials and set up artificial not only, and avoided owing to setting up construction safety risk and the absolute claim for eot that heavily loaded high carriage brings, for engineering construction provides safeguard smoothly.
Description of drawings
Accompanying drawing is the structure conversion layer type steel concrete girder mould suspension schematic diagram; Among the figure: steel reinforced concrete crossbeam 1, section steel beam 2, floor 3, reinforcing bar 4, U-shaped peg 5 is to wearing screw rod 6, the lumps of wood 7, beam sides template 8, square steel 9, beam bottom board plate 10.
The specific embodiment
Structure conversion layer type steel concrete girder mould suspension construction method comprises the steps:
1) on the design attitude with section steel beam 2 on-site hoistings steel reinforced concrete crossbeam 1 in the structural transition layer;
2) set up falsework 1 time at structural transition layer steel reinforced concrete crossbeam, and on falsework lay square steel 9, the lumps of wood 7, beam bottom board plate 10 successively;
3) hang U-shaped peg 5 on section steel beam 2, and U-shaped peg 5 is passed beam bottom board plate 10, the lumps of wood 7, the square steel 9 that is laid on the falsework successively, square steel 9 usefulness nuts are fixed, and carry out reinforcing bar 4 colligations of girder with rolled steel section en cased in concrete at the same time;
4) utilize the nut of U-shaped peg 5 bottoms, regulate the absolute altitude and the level of beam bottom board plate 10, after finishing the U-shaped peg 5 and the reinforcing bar spot welding of beam are fixed;
5) progressive type steel concrete beam sides template 8 and mutually the reply wear screw rod 6 installation, remove falsework then, finish the after-pouring concrete.
Below structure conversion layer type steel concrete girder mould suspension construction method and other are further described:
1) on the design attitude with section steel beam 2 on-site hoistings steel reinforced concrete crossbeam 1 in the structural transition layer;
(1) the conventional tower crane that adopts of section steel beam lifting winches to floor, and the method for barre lifting is adopted in the transportation by lighter back.
(2) section steel beam weight is hung section steel beam on the operation floor in the elevating capacity scope with tower crane generally about 1t/m, below the cushioning sleeper.
(4) below girder steel, put the steel pipe cylinder into, use electronic low speed winch member to be dragged to lentamente the pillar next door of installation.
(5) preestablished one on the independent suspension rod of lattice, anchoring main push-towing rope rope, the length of hawser is regulated by the 5t Chain block.
(6) assembly pulley that has the wire rope of H20-4D and ф 16mm 6 * 37 to form on the suspension rod is used for hoisting and hanging, and the power of traction is one of the electronic low speed winch of 5t.
(7) use 4 of the wire rope of ф 31mm to tie up i beam usefulness, the Chain block that adds 1 10t simultaneously again comes the levelness of adjustment means.
(8) after the rope coil of hanging i beam ties, operating personnel are divided the work, the cammander tells somebody what one's real intentions are to operating personnel's division of labor.
(9) require separately oneself post scope to be carried out safety inspection according to the division of labor, all must report to the cammander various situations, pinpoint the problems solves at once, makes everybody accomplish that there is number at the end, clear oneself the operation overall process and the safety requirements of lifting.
(10) check comprehensively, and perform the record machine account, agree to try to hang through checking certain no problem back.
(11) send the signal of lifting by the cammander after, member is stable by the steady rope at two, by hoist engine member is sling at leisure, behind the liftoff 0.2m, the cammander sends stop signal, stops the hoist engine starting.
(12) by each post the opereating specification of oneself is carried out safety inspection again, self check reports the developments to the cammander later.The cammander convenes personnel, and member is done artificial impact, vibration on the ground.
(13) member is after overbump, vibration, static get off comprehensive situation is checked, as: suspension rod has not distortion, sealing-off, it is not unusual that the basis has not sedimentation, head to have, and pulley has not blocked portion phenomenon, and whether anchor point is loosening, wire line shoe has not slippage, hoist engine has not displacement, and whether central axis aligns, and member has not level or the like.
(14) after the cammander confirms that the link of overall process all unusual situation do not occur, formally send the lifting order, the member lifting.
When (15) treating that member is hung setting height(from bottom), the cammander sends stop signal, and hoist engine stops, and it is stable by the rope at two to hang empty member.
(16) cammander sends signal, regulates Chain block by the operator of the main stress hawser of back according to order command, and steel cable is lengthened, and suspension rod is continued forward to tilt, and when treating that member arrives on the central point of erection column, stops the inclination of suspension rod.
(17) after the cammander sent order command, member descended lentamente along with the starting of hoist engine, was placed to the basis reposefully and went up in place.
(18) suspension rod is under the state that does not all unload, play certain stabilization, carry out the laying of the interim support bar of steel I-beam simultaneously, the support bar seamless steel pipe of ф 102 * 4mm, shore the upper flange that is welded on steel I-beam and the intersection of web, the bottom of steel pipe adopts plank and contract wood to hold out against, beat reality.The another side that can not support just uses the wire rope of φ 15.5mm, anchoring tension on the opposite pillar of the direction of tumbling, and the 3t Chain block is used in tension.
(19) treat that steel I-beam welding is firm after, more all pine hoist engine, dismounting tie wire rope behind suspension rod and member total detachment, uses tower crane that suspension rod is shifted, and carries out going in the operation of order that next i beam lifts and safety notice again.
2) set up falsework 1 time at structural transition layer steel reinforced concrete crossbeam, and on falsework lay square steel 9, the lumps of wood 7, beam bottom board plate 10 successively.
(1) hangs the die body series structure
A) the bed die panel adopts 18 thick wooden plywood templates; Lower berth 50 * 80 lumps of wood; The lumps of wood is square steel down, and spacing is determined according to calculating; Square steel is by inverted U-shaped Screw rod bearings, and screw diameter 18mm adopts double nut to add backing plate, and the design stretching resistance is not less than 25kN.
B) the side form panel adopts 18 thick wooden plywood templates; The outside 50 * 80 lumps of wood, spacing is not more than 300; Adopt two steel pipes outer stupefied adding wearing the screw rod drawknot, screw diameter 16mm, spacing is determined according to calculating.
C) the section steel beam template system is provided with the wire rope anchor ear along span every 2m.The beam both sides hold out against with steel pipe, avoid level to producing distortion.
D) consider to adopt in the construction of extension die body system, load bears by section steel beam, and is stable for the cross section that guarantees section steel beam in the work progress, can advise designing adding floor every 2m between last bottom flange.
(2) hang mould main points are installed
At first utilize steel pipe to set up the interim bracing frame of bed die, lay square steel, the lumps of wood, bed die are worn peg again and are carried out reinforcing bar binding simultaneously, utilize nut fine setting bed die absolute altitude and level at the bottom of the peg.After adjustment was finished, spot welding is peg fixedly, wore wearing bolt front cover side template, treated to seal another side form after reinforcing bar binding is finished.
3) on section steel beam 2, hang U-shaped peg 5, and U-shaped peg 5 is passed beam bottom board plate 10, the lumps of wood 7, the square steel 9 that is laid on the falsework successively, and fix, carry out reinforcing bar 4 colligations of girder with rolled steel section en cased in concrete at the same time with nut.
4) utilize the nut of U-shaped peg 5 bottoms, regulate the absolute altitude and the level of beam bottom board plate 10, after finishing 5 spot welding of U-shaped peg are fixed.
(1) after steel column has lifted, before girder steel lifts, goes up stirrup in the cover upper beam at bean column node bracket (1m is long) in advance, wear with convenient beam stirrup from now on.
Earlier upright bed die and side form on one side during the colligation of beam muscle, are worn main muscle earlier when (2) pricking muscle, and cloth stirrup again, is pricked and can be sealed the opposite side template after silk is finished pre-pipe laying.
(3) place the stirrup muscle on the section steel beam, spacing 500 is by quincuncial arrangement.
5) progressive type steel concrete beam sides template 8 and mutually the reply wear screw rod 6 installation, remove falsework then, finish the after-pouring concrete.
(1) consider the formwork-support factor, casting and compacting of concrete direction consideration symmetry is scattered.
(2) because interior section steel beam of shaped steel concrete beam and cross section back gauge are less,, further guarantee concrete construction quality, can consider to adopt pea gravel concreten or self-compacting concrete for avoiding the cavity.
(3) because shaped steel concrete beam section is higher, width is little, and the middle part is provided with girder steel.Therefore the quality of vibrating of concrete is an emphasis at the bottom of the beam.Except that the routine techniques measure and strengthening management, can consider to be provided with attached vibrator.
(4) because this position arrangement of reinforcement is closeer, steel column, girder steel sectional dimension are bigger, are emphasis so concrete vibrates.Must check operating surface before vibrating comprehensively, consider the vibrating spear insertion position in advance; The slump requires to guarantee concrete flowability about 18cm; Notice when vibrating that symmetrical multiple spot vibrates, also will avoid shaking simultaneously.
6) material and equipment
The structure conversion layer type steel concrete girder mould suspension construction relates to the material and facility of following several respects:
Relate to materials such as hanging device such as tower crane, barre, welding machine and welding rod, wire rope when (1) section steel beam is installed.
(2) U type peg: diameter 1 8mm, length is determined according to deck-molding, the configuration double nut, the design stretching resistance is not less than 25kN;
(3) square steel: h=60, t=2.5, length is not less than 800, and spacing is determined according to calculating;
(4) lumps of wood, to wearing other materials such as screw rod.
(5) the reinforced concrete beam board formwork-support utilizes materials such as steel pipe, fastener, simultaneously as the operating platform of hanging the mould construction.
7) quality control
(1) U type peg should be fixed with the spot welding of beam muscle, displacement distortion when avoiding casting and compacting of concrete.
(2) seam adopts double-sided tape between beam form and between beam form and template die, avoids spillage.
(3) U type peg spacing is unsuitable excessive, especially in the beam crossover sites, generally can consider about 500.
(4) work progress must guarantee that peg is vertical and firm with reinforcing bar spot welding, must not be crooked, and nut must be tightened, and guarantees stressed must not the distortion.
(5) square steel length can not be too short in the construction, can not be oversize, otherwise can influence peripheral scaffold building.
(6) fine setting of big beam bottom board absolute altitude and level utilizes the square steel lower nut to carry out.
(7) be provided with and steel pipe should be set to support between the crossbeam of hanging die body system, concreting should be noted symmetry, avoids causing hanging the mould level to the distortion displacement.
(8) shaped steel concrete crossbeam bottom utilizes steel tube fastener to clamp, and avoids the dislocation of side form and bed die.
(9) peg is a main bearing member, forbids electric welding burn peg during construction.
(10) should send the special messenger to be responsible for observing template and support situation during the concrete construction.
8) safety measure
(1) employing of hanging mould must be approved through design.The formwork-support of hanging mould and peripheral reinforced concrete beam board must keep relatively independent, avoids shaped steel concrete crossbeam Load Transfer to the bottom bearing frame.
(2) after the installation of extension mould, the bed die falsework must be removed.
(3) template system is a suspension system in the extension mould, and peg is stressed comparatively complicated, must calculate total construction simulation process before the construction, to determine the peg spacing.
(4) consider the importance of structure construction safety, can carry out binomial trials before the concreting: 1. screw rod, nut pull-out test, the design stretching resistance is not less than 25kN; 2. section steel beam preloading test, after section steel beam had lifted, before the concreting, scene selection on the spot (can consider steel) is deposited in specified section steel beam span centre position, observes 1h.
(5) concreting should notice that symmetrical layering carries out, and forbids that local concrete piles up too highly, forbids that vibrating spear directly vibrates to hang die body system and reinforcing bar.
(6) hanging that mould removes is that nut by loosening peg is realized, during stamping die, repeatedly circulates to both sides from the centre and to tear open successively, forbids once to loosen the suspension rod nut, causes that indivedual suspension rods are stressed to be concentrated.
(7) conversion layer is in the high-altitude, and the extension method constructing and overhanging model is work high above the ground, should construct in detail before the construction and tell somebody what one's real intentions are, and carries out safety education.
9) environmental practice
Need not consider shaped steel concrete crossbeam load, the too much input of resources such as economical with materials, manpower when (1) the load-bearing bracing frame designs under the conversion layer.
(2) the selecting for use of each prong material of constructing should be satisfied the requirement of the environmental protection index in the relevant product standard of country.
(3) customization is adopted in the suggestion of the big beam bottom board of shaped steel concrete, and other hang mold materials all should customize the on-the-spot installation in back, the minimizing on-site cutting, beat, flying dust that processing such as welding causes, noise, smell be to the adverse effect of environment.
Claims (1)
1. a structure conversion layer type steel concrete girder mould suspension construction method is characterized in that, comprises the steps:
1) on the design attitude with section steel beam (2) on-site hoisting steel reinforced concrete crossbeam (1) in the structural transition layer;
2) under structural transition layer steel reinforced concrete crossbeam (1), set up falsework, and on falsework lay square steel (9), the lumps of wood (7), beam bottom board plate (10) successively;
3) on section steel beam (2), hang U-shaped peg (5), and U-shaped peg (5) passed successively beam bottom board plate (10), the lumps of wood (7), the square steel (9) that is laid on the falsework, square steel (9) is fixed with nut, carries out reinforcing bar (4) colligation of girder with rolled steel section en cased in concrete at the same time;
4) utilize the nut of U-shaped peg (5) bottom, the absolute altitude and the level of regulating beam bottom board plate (10) after finishing are fixed the U-shaped peg (5) and the reinforcing bar spot welding of beam;
5) progressive type steel concrete beam sides template (8) and mutually reply wear the installation of screw rod (6), remove falsework then, finish the after-pouring concrete.
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| CNB2007100681455A CN100545363C (en) | 2007-04-19 | 2007-04-19 | Structure conversion layer type steel concrete girder mould suspension construction method |
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| CNB2007100681455A CN100545363C (en) | 2007-04-19 | 2007-04-19 | Structure conversion layer type steel concrete girder mould suspension construction method |
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| CN100545363C true CN100545363C (en) | 2009-09-30 |
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| CN106988485A (en) * | 2017-04-21 | 2017-07-28 | 江苏扬州建工建设集团有限公司 | The construction method of structural transition layer Shaped Steel concrete beam |
| CN108222266A (en) * | 2018-01-23 | 2018-06-29 | 宁波建工工程集团有限公司 | Steel Reinforced Concrete Composite Beams hang mould pouring construction structure and its construction method |
| CN108374555A (en) * | 2018-05-04 | 2018-08-07 | 舜杰建设（集团）有限公司 | Girder with rolled steel section en cased in concrete, which pours, to be smash without support hung formwork structure and method |
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| CN108999398A (en) * | 2018-06-29 | 2018-12-14 | 浙江展诚建设集团股份有限公司 | The Formwork Installation Method of steel and concrete composite structure beam |
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| CN111877759B (en) * | 2020-06-15 | 2022-03-22 | 中国一冶集团有限公司 | Tower crane hole plugging construction method |
| CN114482598B (en) * | 2022-01-12 | 2023-09-22 | 广城建设集团有限公司 | Building column strengthening structure and method |
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