CN108999398A - The Formwork Installation Method of steel and concrete composite structure beam - Google Patents
The Formwork Installation Method of steel and concrete composite structure beam Download PDFInfo
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- CN108999398A CN108999398A CN201810693907.9A CN201810693907A CN108999398A CN 108999398 A CN108999398 A CN 108999398A CN 201810693907 A CN201810693907 A CN 201810693907A CN 108999398 A CN108999398 A CN 108999398A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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Abstract
The invention discloses a kind of Formwork Installation Methods of steel and concrete composite structure beam, belong to construction techniques, and the prior art is difficult to ensure screw rod to the effective drawknot of template.The present invention is by passing through screw rod through walls for the Side shuttering drawknot of girder steel two sides in the upper and lower two sides of girder steel, in the split bolt of the span centre position of girder steel setting drawknot girder steel Side shuttering, split bolt is divided into two sections and is respectively welded at the two sides of girder steel, enable split bolt using girder steel as brace foundation, drawknot support is carried out to template, ensure that template is not shifted in casting concrete, guarantees the quality of steel and concrete composite structure beam.
Description
Technical field
The invention belongs to construction techniques, and in particular to a kind of Formwork Installation Method of steel and concrete composite structure beam.
Background technique
When concrete placings, the formwork supporting plate outside steel reinforcement cage is needed, template shifts when avoiding pouring for fixed form, needs to use spiral shell
Bar is to template drawknot.However, for steel and concrete composite structure beam, other than steel reinforcement cage, the interior also fashioned iron of composite structure beam,
The presence of fashioned iron constitutes obstacle to the setting of screw rod, and steel and concrete composite structure beam section specification is big, template area also compared with
Greatly, therefore conventional screw rod set-up mode is difficult to ensure effective drawknot to template.
Summary of the invention
The technical problem to be solved in the present invention and the technical assignment of proposition are that the prior art is overcome to be difficult to ensure screw rod to mould
The defect of the effective drawknot of plate provides a kind of Formwork Installation Method of steel and concrete composite structure beam.
In order to achieve the above objectives, the Formwork Installation Method of steel and concrete composite structure beam of the invention, it is characterized in that: in girder steel
Span centre position setting drawknot girder steel Side shuttering split bolt, the split bolt is divided into two sections and is respectively welded at girder steel
Two sides.
As optimization technique means: passing through screw rod through walls for the Side shuttering drawknot of girder steel two sides in the upper and lower two sides of girder steel.
As optimization technique means: after the completion of steel beam lifting, setting up formwork with steel pipe while pillar reinforcement installation
Frame, operating platform when as mounting rail bottom reinforcing bar and template.
As optimization technique means: after support for shuttering is set up, first spreading beam bottom mother plate, then Reinforcement with hanging branch
On mould bases, it is placed on the right and left of girder steel；Later first along girder steel span direction every 3m install one group of stirrup to longitudinal reinforcement into
Row pre-installation, longitudinal reinforcement and stirrup form the steel skeleton of section steel beam after being bound with iron wire, then carry out girder steel top, lower part longitudinal direction
The installation and binding of reinforcing bar.
As optimization technique means: steel split heads is placed on girder steel, with steel split heads by the longitudinal reinforcement and steel on the upside of girder steel
It keeps at a distance between beam, the reinforcing bar on the downside of girder steel is hung on the downside of girder steel by stirrup.
As optimization technique means: when binding longitudinal reinforcement, first the stirrup processed opening being placed under beam, then two
Worker's cooperation is dismantled from opening by stirrup, covers indulge on muscle in beam from bottom to top；Stirrup dismantle degree with can cover girder steel and
Subject to vertical muscle, after being inserted in, slightly firmly stirrup should be made to restore to the original state, after the completion of suit, stirrup and longitudinal reinforcement be bound secured.
As optimization technique means: split bolt and template inner wall contact position add mortar leakage prevention seal washer and with tapered sleeve tops
Tightly.
The present invention is divided by the split bolt in the span centre position of girder steel setting drawknot girder steel Side shuttering, split bolt
Two sections and the two sides of girder steel are respectively welded at, enable split bolt using girder steel as brace foundation, drawknot support is carried out to template, it is ensured that
Template is not shifted in casting concrete, guarantees the quality of steel and concrete composite structure beam.
Detailed description of the invention
Fig. 1 is by the schematic diagram on fold-line-shaped steel girder erection to steel column；
Fig. 2 is the Section A-A enlarged diagram of Fig. 1；
Fig. 3 is the schematic diagram that reinforcing bar is laid on steel split heads；
Fig. 4 is that schematic diagram is arranged in the suspension column of I-steel steel column；
Fig. 5 is the section B-B enlarged diagram of Fig. 4；
Fig. 6 is that schematic diagram is arranged in the suspension column of cross steel steel column；
Fig. 7 is the section the C-C enlarged diagram of Fig. 6；
Fig. 8 is the schematic diagram that beam screw rod is worn in setting on girder steel of the present invention；
Figure label explanation:
01- girder steel；
The middle section 11-, the end 12- section, 13- bridge joint sections, 14- hoisting beam, 15- triangular reinforcing plate, 16- peg；
02- steel column；
21- suspension column anchor slab, 22- anchor bolt, 23- reinforce transverse slat, 24- peg；
03- steel split heads；
04- reinforcing bar；
05- support for shuttering, 51- upright bar, 52- horizon bar, 53- adjust bracket, the 54- lumps of wood, 55- template；
06- screw rod through walls；
07- split bolt；
The basis 08-；
81- Concrete seat pad, 82- ungauged regions pea gravel concreten, 83- Grouting Pipe, 84- foundation beam.
Specific embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The Formwork Installation Method of steel and concrete composite structure beam of the invention is that drawknot girder steel is arranged in the span centre position of girder steel
The split bolt 07 of Side shuttering, split bolt 07 are divided to for two sections and are respectively welded at the two sides of girder steel.Moreover, on girder steel,
Lower two sides pass through screw rod 06 through walls for 08 drawknot of Side shuttering of girder steel two sides.
Further, by after the completion of steel beam lifting, support for shuttering 05 is set up with steel pipe while pillar reinforcement installation, as
Operating platform when mounting rail bottom reinforcing bar and template.After support for shuttering is set up, beam bottom mother plate is first spread, then Reinforcement is used
It hangs on support for shuttering, is placed on the right and left of girder steel；One group of stirrup first is installed to longitudinal direction every 3m along girder steel span direction later
Reinforcing bar is pre-installed, and longitudinal reinforcement and stirrup form the steel skeleton of section steel beam after being bound with iron wire, then carry out girder steel top, under
The installation and binding of portion's longitudinal reinforcement.
On girder steel place steel split heads 03, with steel split heads by the longitudinal reinforcement 04 on the upside of girder steel and between girder steel keep away from
From the reinforcing bar on the downside of girder steel is hung on the downside of girder steel by stirrup.
When binding longitudinal reinforcement, first the stirrup processed opening is placed under beam, then two workers cooperate from opening
Stirrup is dismantled, covers indulged on muscle in beam from bottom to top；The degree of dismantling of stirrup, which is subject to, can cover girder steel and vertical muscle, after being inserted in,
Slightly firmly stirrup should be made to restore to the original state, after the completion of suit, stirrup and longitudinal reinforcement be bound secured.
Split bolt adds mortar leakage prevention seal washer with template inner wall contact position and is held out against with tapered sleeve.
Below by way of fold-line-shaped girder steel, the present invention will be further described with concrete combined structure construction method.The broken line
Shape girder steel and concrete combined structure construction method the following steps are included:
A girder steel 01, steel column 02) are made: referring to Fig. 1, girder steel being divided into 11, two, middle section end 12, two bridge joint sections 13 of section,
Two bridge joint sections are fixedly connected on middle section both ends and constitute hoisting beam 14, obtuse angle is kept between bridge joint sections and middle section；In steel column 02
Upper end weld the end section 12 of girder steel, keep obtuse angle between steel column and end section；
B) steel column 02, girder steel 01 are installed: steel column being installed according to embedded column base and pours base concrete, hoisting beam 14 is lifted
Be fixedly connected between symmetrical two steel column and by the end of 14 both ends of hoisting beam and steel column upper end section 12, enable middle section, two end sections,
Two bridge joint sections constitute the fold-line-shaped girder steel to arch upward upwards；
C steel column reinforcing bar, girder steel reinforcing bar and formwork) are bound, after-pouring column, beam concrete.
Specifically, being bolted between middle section and bridge joint sections, bridge joint sections and end section.
It connects and installs in high-altitude for the ease of operating personnel, holding the length of section is >=1200mm.
It can be according to the method for embedded column base installation steel column, first cast-in fixing bolt and the concrete for pouring basic infrastructure,
Suspension column anchor slab 21(- 5, Fig. 6-7 referring to fig. 4 are welded in the lower end surface of steel column when making steel column), anchor bolt is opened up on suspension column anchor slab
Perforation；Anchor bolt 22 is through in anchor bolt perforation when steel column is installed, is tightened and is welded with nut to after steel column correction；Followed by
The binding of basic top (such as foundation beam 94) reinforcing bar.Moreover, to ensure the anchor bolt perforation on cast-in fixing bolt and suspension column anchor slab 21
Positional accuracy covers suspension column anchor slab in the basic concrete placings of embedding anchor bolt and positions on the top of anchor bolt to anchor bolt, pours concrete
The lower end that suspension column anchor slab is again welded on suspension column anchor slab steel column is removed afterwards.When steel column is installed suspension column anchor slab and base concrete it
Between placing height be 50mm Concrete seat pad 91 to form preset slot between suspension column anchor slab and base concrete, steel column installs
The concrete of basic remaining part of the after-pouring in addition to preset slot, then High Strength Non-shrinking Filling Material is perfused into preset slot and constitutes
Ungauged regions pea gravel concreten 92.It is also possible that when making steel column according to the method for embedded column base installation steel column in steel column
Suspension column anchor slab is welded in lower end surface, and fixes anchor bolt on suspension column anchor slab；When steel column is installed together by steel column, suspension column anchor slab, anchor bolt
Lifting is installed in place, at the beginning of anchor bolt, suspension column anchor slab and foundation bottom reinforcement welding are securely completed suspension column after steel column correction
Step installation；Followed by the binding of basic top (such as foundation beam 94) reinforcing bar, part reinforcing bar passes through steel column when binding, has bound
Steel column is corrected again after, reinforcing bar and the steel column plug welding that steel column is passed through after correction are secured, complete steel column installation.Further
, the preset slot of 50mm, base concrete condensation are reserved when pouring base concrete between suspension column anchor slab and base concrete
Perfusion High Strength Non-shrinking Filling Material constitutes ungauged regions pea gravel concreten 92 in backward preset slot.
No matter select which kind of above-mentioned method that steel column is installed according to embedded column base, prior built-in slip casting pipe 93 enables slip casting
Pipe extend into preset slot from basic top surface, and it is thin that High Strength Non-shrinking Filling Material composition ungauged regions are perfused into preset slot by Grouting Pipe
Stone concrete 92.
Method to steel column correction is longitudinal axis, the transverse axis of pop-up steel column at the scene, then with longitudinal axis, transverse direction
The contour line of suspension column anchor slab is popped up on the basis of axis；Steel column is hung to installation site, by suspension column anchor slab and the suspension column that in advance pops up
The contour line of anchor slab is aligned, then respectively in steel column longitudinal axis direction, transverse axis direction is each fixes a theodolite, passing through
Under the auxiliary of latitude instrument, the steel column in suspended state is finely adjusted, the longitudinal axis, transverse axis and theodolite of steel column are regarded
Point is stringent to be overlapped.
Steel split heads 03(is placed when binding girder steel reinforcing bar on girder steel referring to Fig. 3), with steel split heads by the reinforcing bar on the upside of girder steel
It keeps at a distance between 04 and girder steel, the reinforcing bar on the downside of girder steel is hung on the downside of girder steel by stirrup.
The reserving hole at the bean column node in the section of end.
Referring to fig. 2, girder steel is made with H profile steel, steel column is made with H profile steel or cross-shaped steel, steel column upper end, which is welded with, to be added
The angle of tyrannical plate 23, end section and steel column welding position is welded with triangular reinforcing plate 15.
When to girder steel formwork, the upper and lower two sides of girder steel by screw rod 06 through walls by 08 drawknot of Side shuttering of girder steel two sides,
The split bolt 07 of the span centre position setting drawknot girder steel Side shuttering of girder steel, split bolt 07 are divided to for two sections and are respectively welded at
The two sides of girder steel.
Specific operation involved in the following linear girder steel of doubling and concrete combined structure construction method is done further
It explains.
Technical preparation
Technical preparation includes job specfication, drawing examination, confide a technological secret, the comparison of arrangement and method for construction, the editing of arrangement and method for construction,
Quality control target and measure, the object of safety management and measure turn over sample etc..
(1) steel of marching into the arena strictly are checked and accepted, steel plate, ribbed stiffener, suspension column anchor slab, the girder steel in profile steel concrete column are equal
Using Q345B steel, looks into whether the data such as product certificate, quality specification, test report list are complete, look into the specification and board of steel
Number whether meet the requirements.It checks surface quality, surface corrosion and the steel by overbump must not be used.Sampling reinspection as required,
Mechanical performance and chemical component to steel are tested analysis.Steel after passed examination should clearly be divided by specification and the trade mark
Class, storage is stacked neatly, and should carry out preservation, prevents material by corrosion corrosion and impact.
(2) welding is the committed step in steel construction process, and manual welding: Q345 steel uses E50 hydrogen controlled electrode,
Its performance should meet the regulation of " low alloy steel welding rod " (GB/T5118-95).
(3) in addition to indicating, high-strength bolt is all made of 10.9 grade high-strength bolts.The use group of its grade of steel and nut, washer
Conjunction should meet " high-strength large hexagon head bolt used for steel structure, big hex-head nut, washer and technical conditions " (GB/T1228~
1231) regulation.The rubbing surface of high strength exploitation steel should carry out sandblasting or Shot Blasting, and anti-slip coefficient answers >=
0.50。
(4) for peg using socket cap weldering nail, technical conditions should meet the regulation of " socket cap weldering nail " (GB10433-89).
Peg material is Q235.
(5) according to the requirement of technique and machining accuracy, reasonably select cutting, straight correction, retaining wall on slope, it is round as a ball, snuggle up to it is curved
And drilling equipment.Engineering metering utensil will through inspection and before the deadline.Welder will have special work post card.
(6) produce before should confide a technological secret, work well arrangement and divisions of responsibility, specify safety measure, quality requirement,
Collaborative work between technical essential and each work post, for Steel section member processing can be safe and orderly be ready.
(7) processing of Steel section member should be carried out in the case where ensuring safe environment, since there are a large amount of weldings, should be done
Good scene fire prevention.The processing of Steel section member will carry out on the ground of smooth solid no ponding, and spaciousness is answered in place, facilitates component
Processing and stacking.
The production of 1.1 Steel section members
Steel section member production mainly includes the production of steel column and girder steel, and girder steel generally uses H profile steel, due in Combined concrete knot
In structure, column cap stirrup and Liang Zong muscle drag hook will pass through girder steel at bean column node, therefore reserve at the bean column node on girder steel
The required precision of hole, hole location is not high, and error can adjust by adjusting the position of stirrup and lacing wire, and overall difficulty of processing is not
Greatly.Steel column generallys use H profile steel and cross-shaped steel.
Steel column and girder steel generally in factory or have the construction site of working condition to be produced, and the quality of the quality of production is straight
Connect the superiority and inferiority for being related to the stress performance of reinforced concrete composite structure component, thus to be turned over from fashioned iron sample, section steel manufacture and
Peopleware etc. is rigid in checking up, it is ensured that Steel section member it is up-to-standard.
Here the sample that turns over refers mainly to construction and turns over sample, is that list reinforced concrete composite structure in detail according to design drawing medium-sized
The contents such as specification, size, the shape of steel make blanking inventory and processing drawing, worker are enable to carry out according to material list and drawing
The production of Steel section member.Girder steel of the present invention is split as five sections of progress assembly, grasps in the sky for convenience of installation personnel because arch camber designs
Make, end segment length is not less than 1200mm.
The construction of steel column
This, which is sentenced for multistage steel column connects into a high steel column, illustrates.
The construction of 2.1 fashioned iron suspension columns
The present invention installs steel column according to embedded column base, and embedded column base is by profile steel concrete column insertion basis, and bottom is set
Set suspension column anchor slab and anchor bolt.When suspension column shallow embedding, shearing undertaken by the friction between suspension column anchor slab and concrete, when suspension column embedment compared with
It is deep, it shears by the friction of suspension column anchor slab and inlet part shared.Therefore suspension column embedment is deeper, and shear-carrying capacity is also bigger.
Moment of flexure is mainly by the support shared of anchor bolt and fashioned iron side armored concrete.Embedded column base has compared with non embedded column footingP
Bearing capacity is high, rigidity is big, stability is good, is conducive to the advantages that antidetonation.
(1) it is applied by the Basic practice of embedded column base in national standard drawings 04SG523 " reinforced concrete composite structure construction "
Work.
By this standard drawing requirement, the depth in steel column buried foundation should be not less than the long edge size of 3 times of steel columns.But in reality
In construction, the Base isolation system thickness of some engineerings is not able to satisfy this requirement, it may appear that the long edge size of 3 times of steel columns is greater than
The case where Base isolation system thickness, after there is such case, should link up in time with designing unit, recalculate fashioned iron buried foundation
Interior length.
In addition, according to the explanation in standard drawing, " anchor bolt and backing plate should be welded after column is installed and corrected ".When failing
Meet this requirement, steel column and suspension column anchor slab, the anchor bolt welding fabrication in component processing factory, namely anchor bolt oneself and column before column corrects
Foot anchor slab welds, and in order to fix steel column, at this moment steel column and raft slab muscle can be welded, and increases support, guarantee type when necessary
Steel column is not subjected to displacement.
Before the work of embedded column base, the depth that should be embedded to according to steel column completes the reinforcing bar of the following part basis of suspension column anchor slab
Binding.Longitudinal axis, the transverse axis of steel column are popped up according to drawing, then on the basis of longitudinal axis, transverse axis, pop up suspension column
The contour line of anchor slab.Steel column, suspension column anchor slab and anchor bolt require accurate positioning when steel construction factory-assembled is welded, firm welding,
Fashioned iron axle center will be overlapped with bottom plate centroid, and bottom plate will be perpendicular to fashioned iron axis.
For general bottom steel column, mechanical hoisting is generallyd use, the method manually corrected is installed.When installation,
Steel column is first hung to installation site with hoisting machinery, suspension column anchor slab is aligned with the suspension column anchor slab contour line popped up in advance, so
Afterwards respectively in the longitudinal axis of steel column, transverse axis direction is each fixes a theodolite, under the auxiliary of instrument, in suspention
The steel column of state is finely adjusted, and is overlapped the longitudinal axis of steel column, transverse axis strictly with theodolite viewpoint, to guarantee that suspension column is fixed
Position is accurate.Then anchor bolt and foundation bottom reinforcement welding is secured, it completes suspension column and tentatively installs.Followed by sole plate or
The binding of foundation beam upper reinforcement, since part reinforcing bar is needed across fashioned iron, so to be utilized again after the completion of wearing muscle binding
Theodolite is corrected the position of steel column in same method before, after correction that perforation reinforcing bar and fashioned iron plug welding is secured.Extremely
This, bottom steel column is installed.
The construction of 2.2 steel columns
Steel column is lifted by crane using single machine, and the automobile of corresponding tonnage and length, branch of the component on haulage vehicle are selected in the transport of component
The length and binding method that point, both ends are stretched out should ensure that component does not generate permanent deformation, do not damage surface layer.Using wirerope plus
Jack fixing component, it is mobile in transport to prevent component, to be subject between wirerope and component it is corresponding be isolated, prevent component and steel
Cord is mutually wiped, and prevents safety accident when transport from occurring., should be by design suspension centre vertical lifting when component loads and unloads, and prevent from damaging
The measure of component.
Girder steel is divided into 5 sections, operates in the sky for convenience of installation personnel, holds the length of section not less than 1200mm.To ensure beam
The angle of arch camber holds section and pillar welding to be welded on ground, and the reserved good bolt hole connecting with other girder steels.Steel
Column is installed using truck crane.And first time verticality correction is carried out, it is fixed after correction with wirerope.
(1) positioning, correction of steel column.Generally steel column is fixed from four direction with four wirerope (cable wind rope), four
There is pressure cucurbit on cable wind rope, the length of cable wind rope, can be elastic one therein any by pressure cucurbit adjustment.Steel column axis
Adjustment uses cable wind rope bearing calibration, and scene is looked for vertically in 90 ° of theodolite with two, constantly adjusted in correction course, directly
It is finished to correction, pillar front, center side is made to be overlapped with axis, and check whether the verticality of pillar meets the requirements.If
It is unsatisfactory for requiring, then checks steel column locations and verticality with theodolite, repeat the above process, until it is errorless, finally tighten two sections
The high-strength bolt with large hexagon bea of the connecting plate of steel column is to nominal torque.
(2) it when multistage steel column connects, is connected between steel column and steel column using big hexagonal high-strength bolt, when high-strength bolt is installed
The attrition surface of component should protect dry cleansing, must not be in rain work, and first stubborn, whole twist of bolt must be on the same day.It tightens suitable
Sequence should be applied from gusset plate center to edge it is stubborn, two connectors be it is first main after secondary sequence, steel column is first edge of a wing trailing web
Sequence, forbid to penetrate bolt (striking with a hammer) by force.High-strength bolt tightness is controlled with torque wrench, and observes tail
Portion's wabbler twists off situation, and tail portion wabbler treats as its whole screwing torque by the person of twisting off and reaches acceptable quality, tail portion wabbler
Angle method not can be used by the person of twisting off to examine.Its exposed screw thread should be 2-3 button, and the ratio that 1 button or 4 are detained must not exceed installed spiral shell
The 10% of bolt.All installation screws must not use gas cutting reaming, fold pin hole when plate and cause connection bolt not beyond tolerance
Can break-through when, can be modified with reamer, but the maximum gauge after modifying should be less than 1.2 times of the diameter of bolt, when fraising should prevent
Only iron filings fall into plate lap seam gap.
(3) welding of steel column: using live groove full penetration between steel column and steel column.To prevent integral solder
Welding residual stress is deformed and reduced, implements to weld by following principle in construction: first weldering datum weld seam, then weld periphery weldering
Seam；Welding should consider that symmetrical configuration, node be symmetrical, profile flanges symmetrical equilibrium symmetrical welding as far as possible.The weldering of steel column and steel column
It connects, is symmetrically welded the edge of a wing simultaneously by two welders or four welders.
(4) review of axis, verticality is carried out after steel column is installed, review is without misunderstanding after-pouring base concrete.It pours
When building base concrete, because the preset slot between sole plate and suspension column anchor slab in the presence of about 50mm is in the milk with high strength and no shrinting
Material is in the milk, and therefore, it is necessary to bury a Grouting Pipe in advance, Grouting Pipe can use the steel pipe of Φ 25, extend into from basic top surface
Steel column bottom, facilitates secondary grouting.
Section steel beam construction
The transport installation of 3.1 section steel beams
The processing of girder steel is carried out in processing space, and shape steel plate reserving hole is used to prick post head hoop muscle or beam indulges the drag hook of muscle, this some holes
Bit comparison is easy determination, and the requirement to error is also less strict, it may be necessary to by slightly adjusting the position of stirrup or drag hook,
So that hole location is met the requirements.I will not elaborate.The section steel beam processed should number and be transported to construction site.
(1) technical preparation
Installation girder steel before will the size to girder steel check again, the length of especially girder steel have to it is accurate, while
Distance between two steel column upper end section of actual measurement is also wanted before installation, confirms the length and two steel column upper end section of actual measurement of girder steel
Between distance match.
(2) it lifts
Before steel beam lifting, two bridge joint sections and middle section are first completed into assembled composition hoisting beam on ground, is lifted by crane and is lifted with crane
Beam, steel beam lifting preferably use special hanger, two o'clock binding, when lifting, hangs rise in must assure that girder steel is made to keep horizontality.It will
The bolt hole reserved on hoisting beam, end section is connected with, and can not be aligned in case of bolt hole, four of pillar can be used
Until steel column from four direction is adjusted to that bolt can be installed by cable wind rope.Operator is spliced in the sky after fastening seat belts.
Steel column second-order correction is carried out after the completion of splicing.
(3) node connects
Girder steel and steel column can be connect using welding, in the welding must tracking measurement correction column between column at a distance from, especially
It is node weld shrinkage.Reach control deformation, reduces or eliminates the purpose of additional stress.
(4) high-strength bolt connects
High-strength bolt connection also can be used between girder steel, rubbing surface uses the processing method of raw red rust after sandblasting, installs high-strength spiral shell
When bolt, rubbing surface should be dried.Installation high-strength bolt should carry out after girder steel Stepwise calibration, adjustment are qualified, forbid to squeeze by force.Such as
Screw hole cannot be freely passed into, other than adjustable position, reamer also can be used to carry out the finishing of hole, the maximum for modifying metapore is straight
Diameter should be less than 1.2 times of the diameter of bolt, forbid gas cutting reaming.When fraising, iron filings fall into plate stitch in order to prevent, should be by hole week bolt
It tightens.High-strength bolt just twists, it is multiple twist and twist eventually and should be completed in 24 hours, generally should by by the outside sequence in Bolt center into
Row is tightened.
The reinforcement installation of steel column, girder steel
4.1 steel column reinforcement installations
The installation of profile steel concrete column longitudinal reinforcement and stirrup will carry out after steel column is installed, due to steel column presence and examine
There are some differences for the installation of girder steel after considering, installation that column indulges muscle and stirrup and the reinforcement installation of common concrete column.
(1) muscle installation is indulged
The installation of longitudinal reinforcement and the installation steps of common concrete column reinforcing bar are substantially the same in profile steel concrete column, but due to type
The presence of steel skeleton, longitudinal reinforcement exists with girder steel to intersect, and should indulge muscle position, selection in construction according to design feature reasonable Arrangement
Suitable installation method.Before carrying out the installation of column muscle, reinforcement detailing work is carefully carried out according to drawing data.Longitudinal reinforcement it
Between connected using electroslag pressure welding, the connector of reinforcing bar is staggered 50% in same section, and the spacing of connector is greater than 50cm.
(2) stirrup installation
Stirrup in profile steel concrete column is all to Reinforcement in column as the stirrup in ordinary reinforced concrete column
The reinforcement component of effect of contraction is played with concrete.In engineering, the stirrup of profile steel concrete column is generally the rectangle to open the door, octagon
Stirrup and lacing wire composition, general stirrup diameter are the steel pipe of Φ 6 or Φ 8, can use opening, stirrup is directly set to steel
Outside column.When stirrup diameter is larger, hardness is larger, not easy to install, or when column cap position encounters section steel beam, cannot be made into
Closed circular generally uses U-stirrups.Carry out stirrup turn over sample processing when, be made into " └ " shape combined with " ┑ " shape or
" ∪ " shape and "-" shape group are combined into closed stirrup, and when installation, " └ " shape or " ∪ " u stirrup are first passed through pre-manufactured hole pass-through
Steel beam web plate, then it is welded into closed circular.
4.2 section steel beam reinforcement installations
Girder steel is generally first installed in the installation that girder steel reinforcing bar can be carried out after the completion of steel column reinforcement installation, then muscle is indulged at mounting rail bottom.
When construction, the lifting of girder steel is first carried out, after the completion of lifting, can be set up while pillar reinforcement installation with steel pipe
Beam bottom support for shuttering 05, operating platform when as mounting rail bottom reinforcing bar and template.
(1) pre-installation of upper longitudinal bar, stirrup and tension rib
After support for shuttering has been set up, beam bottom mother plate is first spread, then Reinforcement is hung on support for shuttering with tower crane, be placed on girder steel
The right and left.For longitudinal reinforcement positioning, three-dimensional framework is formed, one group of hoop first can be installed every 3m along girder steel span direction
Muscle is pre-installed, and longitudinal reinforcement and stirrup form the steel skeleton of section steel beam after being bound with iron wire.
(2) muscle installation is indulged in top, lower part
The construction of beam upper longitudinal bar is relatively easy, and the method as normal reinforced concrete beam upper longitudinal bar can be used and connected
Connect installation.In order not to allow top longitudinal reinforcement to be attached to above section steel beam, steel split heads is placed above in steel I-beam.It placed steel
Spacing is formd between the longitudinal reinforcement and I-steel of split heads, facilitates fill concrete.The Reinforcement of lower part can also be with
Stirrup top directly is hung over, forms spacing with bottom template, girder steel also forms concrete cover.
After longitudinal reinforcement is put in place, the joint location and connector area ratio of vertical muscle, ability after meeting the requirements are checked
It is attached.The joint location of upper longitudinal bar should be in girder span in 1/3 range, and the joint location of adjacent vertical muscle should mutually stagger.
When using mechanical connection and welding, the jointing length of Reinforcement is that (d is relatively large in diameter 35d for Reinforcement
Value) and no less than 5OOmm.The connection of vertical muscle should carry out one by one from one end to the other side.
(3) stirrup is bound
The installation of steel reinforced concrete beam stirrup, first have to ensure stirrup to turn over sample processing accurate, vertical muscle is bound
To stirrup corner.When set puts stirrup installation, by the way of whole cuff dress, first the whole hoop processed opening is placed under beam,
Then two workers cooperation is dismantled from opening by stirrup, covers indulge on muscle in beam from bottom to top.Stirrup dismantles degree can cover
Subject to section steel beam and vertical muscle, after being inserted in, slightly firmly stirrup should be made to restore to the original state.After the completion of suit, stirrup and vertical muscle are bound into jail
Gu.
Template installation
5.1 template construct
Modulus should be first calculated before template blanking, the good line of ink marker of bullet is cut again, and the electric saw of cutting board is all made of minor diameter conjunction
Golden metal saw blade, to guarantee cut quality.When with mould, edge joint position answers polishing to handle.The mould plate technique performance made has to comply with
Related quality criterion, appearance must not have rotten, mildew, bubbling, and edges of boards must not defect fluffing.The template made will be by order
Number, is neatly stacked at dry shady place.
5.2 preparation
1. before installation template, Project Technical responsible person, which copes with staff and carries out safe practice, to tell somebody what one's real intentions are and safety education, construction behaviour
Construction drawing and template construction design should be familiar with by making personnel.
2. popping up the inner edge and center line of template according to construction drawing, determining the installation site of template.Setting is surveyed at the scene
Control point is measured, installs, check, correct and pour the deformation monitoring of template when coagulation pours for controlling template.
3. to template to be mounted is checked, is checked, it is ensured that template meets installation requirement, and orderly stacks.Punching block
It should brushing release agent before plate installation.
4. before setting up the shuttering supporting directly installed on the ground, to be flattened to ground, when setting up, controlled by measurement
The absolute altitude and level of pallet support pad, it is ensured that template installation is accurate in place.
The installation of 5.3 templates
1. column template should first install two sides, then calibrated and clear up after sundries and installing other two sides.Vertical formwork support portion
Divide to be directly installed on base soil and to add backing plate, backing plate should have some strength and bearing area.
2. after column template correction in place, application level steel pipe hoop and entire support for shuttering 05 are fixed.When pillar needs single branch
When mould, column is wider than 5OOmm, and every side must not be less than two diagonal braces or horizontally-supported on same absolute altitude, and diagonal brace and ground press from both sides
Angle should be at 45 ° -60 °, and lower end should have antiskid measure.
3. when the section of beam larger (be greater than 700mm), in addition to other than screw rod 06 through walls is arranged in the upper surface of beam, Ying Liang's
Split bolt 07 is arranged in span centre, but because of the barrier of girder steel, screw rod through walls can not pass through girder steel, at this moment need screw rod through walls point
At two-section, it is welded in the left and right side of girder steel respectively, facilitates two side template drawknots.Girder steel formwork will carry out design, pass through calculating
Determine diameter, spacing and the position of split bolt, steel column prefabricated split bolt hole when processing.Split bolt connects with template inner wall
Synapsis adds mortar leakage prevention seal washer and is held out against with tapered sleeve.
4. beam form span of slab greater than 4 meters should arch camber, when no design requirement, springing height can use the 1/ of the full span length's degree of beam
1000-3/1000。
5. should inspect for acceptance after template installation correction, and pay attention to protecting template, is spaced the long period after formwork
Casting and compacting of concrete is carried out again, template should be checked before pouring.When construction, forbid station in template carry out concreting suitable for reading
It vibrates.
Steel reinforced concrete construction
Concreting is the committed step in fashioned iron combined coagulant technology structure construction, due to the presence of the medium-sized steel skeleton of component, especially
It is the positions such as bean column node, and fashioned iron and reinforcing bar are criss-cross, very intensive, pouring and vibrating and bring greatly to concrete
Inconvenience.Therefore, after the completion of fashioned iron and reinforcement installation, the construction personnel for being responsible for concreting and vibrating should see on the spot
It examines, determines the pouring plan of concrete, clearly vibrate a little.In order to guarantee concrete can vibration compacting, concrete should have
Preferable mobility, selects that shape is mellow and full, the lesser coarse aggregate of partial size.
6.1 preparation
1. before casting concrete, should be cleared up at the construction joint of position pouring, it is residual to remove stone, concrete that surface loosens
Slag and other foreign matters.The acceptance(check) of relevant speciality engineering.
2. being linked up with concrete mixing plant, under the premise of proof strength, selection shape is mellow and full, partial size is lesser thick
Aggregate makes concrete have better mobility.
3. checking that can material distributing machine, the construction instrument such as vibrating spear run well, it should prepare that appropriate diameter is lesser to vibrate
Stick is used cooperatively with big vibrating spear.
4. confiding a technological secret to concrete work teams and groups personnel, clearly pour and difficult point of vibrating, before pouring, is familiar with scene
Actual conditions attempt insertion vibrating spear in the more intensive place of fashioned iron and reinforcing bar, it is ensured that vibrating spear can be transferred smoothly.
6.2 pour and vibrate
1. carry out column concreting, about 50mm thickness sand identical with mortar mix ratio in concrete first is poured in bottom
Slurry, prevents rotten.
2. profile steel concrete column is poured using placement layer by layer, lift height is not preferably greater than 500mm, chute should be added when pouring, and controls
The height of drop of concrete processed is not more than 2m.Since there are type steel skeletons in profile steel concrete column, concrete flowing is hindered, is held
It, be from the uniform blanking in four sides of column when easily causing slurries and aggregate separated, therefore pouring.When vibrating, use diameter for 50mm's
Vibrating spear carries out, and reinforcing bar dense part can be used the vibrating spear that diameter is 30mm and be aided with the progress of reinforcing bar pricker.Vibrating should a little be located at
On the inside of steel column and the four corners of column, spacing are not preferably greater than 300mm.
3. girder with rolled steel section en cased in concrete is poured, from the side blanking of beam, concrete is caught up with to the beam other side with vibrating spear,
It two sides while vibrating again when concrete occurs in the other side.
4. reinforcing bar is intensive at the presence and node due to the stiffener of steel column, certain positions are enclosed by fashioned iron and reinforcing bar in column
Firmly, when pouring, the exhaust gap for being enclosed part is blocked by concrete, its inner air is caused can not arranged, and concrete also can not be into
Enter, forms " air bag ".Therefore before being poured to such position, because penetrating through it with outside first with hard sleeve, to concrete
It pours and pipe is extracted again after covering this position and reinforces vibrating.
5. answering strict control vibrating time when concrete vibrating, there is laitance with concrete surface, not until sinking, one
As should control at 20 seconds or so, no more than 45 seconds.
6. when concreting, should be monitored to template deformation, it should take plus arrange in place immediately beyond allowed band
It applies.
The grouting of 6.3 suspension columns
The preset slot of about 50mm is in the milk with High Strength Non-shrinking Filling Material between sole plate and fashioned iron suspension column anchor slab, grouting
Before answer and concrete surface should be moistened within 24 hours and blot ponding within first 1 hour with grouting.Template bottom is sealed using mortar,
Mortar leakage prevention.It when grouting, should be carried out from side, until the other side overflows and covers anchor slab bottom.Without vibrating when grouting, and answer
When being carried out continuously, should not be interrupted.
Claims (7)
1. the Formwork Installation Method of steel and concrete composite structure beam, it is characterized in that: drawknot girder steel side is arranged in the span centre position of girder steel
The split bolt (07) of face die plate, the split bolt (07) are divided into two sections and are respectively welded at the two sides of girder steel.
2. the Formwork Installation Method of steel and concrete composite structure beam according to claim 1, it is characterized in that: upper and lower in girder steel
Two sides pass through screw rod through walls (06) for Side shuttering (08) drawknot of girder steel two sides.
3. the Formwork Installation Method of steel and concrete composite structure beam according to claim 1, it is characterized in that: steel beam lifting is complete
Cheng Hou sets up support for shuttering (05) with steel pipe while pillar reinforcement installation, operation when as mounting rail bottom reinforcing bar and template
Platform.
4. the Formwork Installation Method of steel and concrete composite structure beam according to claim 3, it is characterized in that: support for shuttering is set up
Afterwards, beam bottom mother plate is first spread, then Reinforcement with hanging on support for shuttering, is placed on the right and left of girder steel；Later first along steel
Beam span direction is installed one group of stirrup every 3m and is pre-installed to longitudinal reinforcement, shape after longitudinal reinforcement and stirrup are bound with iron wire
At the steel skeleton of section steel beam, then carry out the installation and binding on girder steel top, lower part longitudinal reinforcement.
5. the Formwork Installation Method of steel and concrete composite structure beam according to claim 4, it is characterized in that: being placed on girder steel
Steel split heads (03) is kept at a distance the longitudinal reinforcement (04) on the upside of girder steel and between girder steel with steel split heads, by stirrup by girder steel
The reinforcing bar of downside is hung on the downside of girder steel.
6. the Formwork Installation Method of steel and concrete composite structure beam according to claim 5, it is characterized in that: binding longitudinal reinforcement
When, first the stirrup processed opening is placed under beam, then two workers cooperation is dismantled from opening by stirrup, is covered from bottom to top
It is indulged on muscle in beam；The degree of dismantling of stirrup, which is subject to, can cover girder steel and vertical muscle, after being inserted in, so that stirrup is restored former
Shape after the completion of suit, stirrup and longitudinal reinforcement is bound secured.
7. the Formwork Installation Method of steel and concrete composite structure beam according to claim 1, it is characterized in that: split bolt and mould
Plate inner wall contact position adds mortar leakage prevention seal washer and is held out against with tapered sleeve.
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| CN109736449A (en) * | 2019-01-11 | 2019-05-10 | 杭州江润科技有限公司 | Stiffness structure bean column node and construction method |
| CN111042520A (en) * | 2019-11-28 | 2020-04-21 | 江苏永联精筑建设集团有限公司 | Slurry overflow prevention construction process for prefabricated part |
| CN111716490A (en) * | 2020-06-12 | 2020-09-29 | 湖北工业大学 | Stair die device with high control precision and capable of vibrating |
| CN114351943A (en) * | 2021-12-23 | 2022-04-15 | 中铁三局集团建筑安装工程有限公司 | Shaped steel mould large-section stiff fair-faced concrete column structure and construction method |
| CN114635572A (en) * | 2022-03-24 | 2022-06-17 | 中国五冶集团有限公司 | Steel beam sliding construction method for steel reinforced concrete composite structure |
| CN114809671A (en) * | 2022-04-27 | 2022-07-29 | 中国一冶集团有限公司 | Structural joint plugging and column steel pipe aligning tool and construction method |
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| CN114809671A (en) * | 2022-04-27 | 2022-07-29 | 中国一冶集团有限公司 | Structural joint plugging and column steel pipe aligning tool and construction method |
| CN114809671B (en) * | 2022-04-27 | 2024-04-02 | 中国一冶集团有限公司 | Construction joint plugging and column steel pipe aligning tool and construction method |
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Application publication date: 20181214 |