CN106522551A - Steel fiber self-compacting concrete construction method for conversion layer - Google Patents
Steel fiber self-compacting concrete construction method for conversion layer Download PDFInfo
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- CN106522551A CN106522551A CN201611032943.8A CN201611032943A CN106522551A CN 106522551 A CN106522551 A CN 106522551A CN 201611032943 A CN201611032943 A CN 201611032943A CN 106522551 A CN106522551 A CN 106522551A
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- compacting concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
Abstract
The invention provides a steel fiber self-compacting concrete construction method for a conversion layer. The method includes the following steps that 1, beams, plates and columns of the conversion layer are sequentially subjected to pre-construction preparation, surveying and setting out, formwork erection and reinforcing bar engineering; 2, preparation of field apparatus, machine tools and raw materials and preparation of steel fiber self-compacting concrete are carried out when the step 1 is carried out; 3, the steel fiber self-compacting concrete prepared in the step 2 is used for the beams and the plates of the conversion layer based on the step 1, and the columns based on the step 1 are subjected to self-compacting concrete pouring; 4, the steel fiber self-compacting concrete is maintained and cooled. Steel fiber self-compacting concrete construction is achieved through the step 1 to the step 4, the steel fiber self-compacting concrete is used for pouring girders with abundant and dense reinforcing bars, the problems that the girders of the conversion layer are difficult to pour and the construction quality is difficult to guarantee are effectively solved, the probability of rework is reduced, and part of cost generated by labor and machines is indirectly reduced.
Description
Technical field
The present invention relates to conversion layer construction method always, and in particular to Steel Fiber Reinforced Self-compacting Concrete conversion layer is constructed work
Method.
Background technology
With Chinese society rapid development of economy, skyscraper has become main flow, and many skyscrapers are to meet polynary
Change demand also gradually develops to multi-functional, multipurpose direction, so as to the version to building, post network arrangements have different wanting
Ask.In order to realize and adapt to the transition of same building different structure form, generally require arrange conversion layer come be connected up-down structure,
Transmission stress., used as important large-scale horizontal structure layer, structural strength is big, thickness is big, and reinforcing bar is intensive for conversion layer, vibrates very tired
Difficulty, and conversion layer structure generally uses the concrete such as bean column node and the crossbeam bottom of high-strength concrete, particularly conversion layer
It is difficult to adequately fill up place, it is easier to form the uncompacted quality problems of the concrete such as cavity, so as to cause major quality accident, drop
Low efficiency of construction.And in the past traditional concrete tensile strength is high, cracking resistance is bad, conversion layer is more prone to temperature
Crack so that construction quality is difficult to ensure that.
The content of the invention
The problem to be solved in the present invention be for prior art in the presence of it is above-mentioned not enough and steel fibre self-compaction is provided
Concrete conversion layer construction efficiently solves the problems, such as that transitional beam pours difficulty and construction quality is difficult to ensure that, reduces
The probability done over again, reduces that part is artificial, the expense that machinery is produced indirectly.
For achieving the above object, present invention employs following technical scheme：Steel Fiber Reinforced Self-compacting Concrete conversion layer is applied
Work engineering method, comprises the steps：
1) beam successively to conversion layer, plate and post carry out construct front preparation, surveying setting-out, formwork, reinforced bar engineering；
2) carrying out step 1) when and carry out preparation and the Steel Fiber Reinforced Self-compacting Concrete of field apparatus, equipment and raw material
Prepare；
3) make step 2) prepared by the Steel Fiber Reinforced Self-compacting Concrete be used for step 1) on the basis of transfer floor beam and
Plate, the step 1) on the basis of pillar carry out self-compacting concrete and pour；
4) maintenance and cooling of Steel Fiber Reinforced Self-compacting Concrete.
The further improvement of construction method of the present invention, step 2) in first carry out the preparation of field apparatus, equipment and raw material,
Then carry out the preparation of Steel Fiber Reinforced Self-compacting Concrete.
The further improvement of construction method of the present invention, prepared by the Steel Fiber Reinforced Self-compacting Concrete include first determining satisfaction
The match ratio of the self-compacting concrete for being not spiked with steel fibre that Construction index is required forms benchmark match ratio, then the benchmark again
Carry out selecting the steel fibre of different addition quantity on the basis of match ratio, sand coarse aggregate ratio, diminishing are carried out to the steel fibre match ratio of minimum volume
A series of adjustment such as agent, the ratio of mud, and extend compared with normal concrete when stirring, then detect that tensile strength, bending resistance are strong by reviewing
Degree and toughness index etc., to obtain optimal test chamber match ratio, to determined by, optimum mix carries out on-site concrete pumping
Test, according to requirement of engineering is met, finally gives the Steel Fiber Reinforced Self-compacting Concrete for meeting construction production requirement.
The further improvement of construction method of the present invention, the steel fibre of the minimum volume need to detect steel fiber reinforced concrete
Tensile strength, bending strength and toughness index etc., so that it is determined that meet mechanics with deformation index request steel fibre kind and
Minimum volume.
The further improvement of construction method of the present invention, the step 2) prepared by Steel Fiber Reinforced Self-compacting Concrete be used for walk
It is rapid 1) in concreting beam and plate include carrying out the pumping of Steel Fiber Reinforced Self-compacting Concrete to transfer floor beam and plate and pour.
The further improvement of construction method of the present invention, step 2) in first carry out the preparation of field apparatus, equipment and raw material,
Then carry out the preparation of Steel Fiber Reinforced Self-compacting Concrete.
The further improvement of construction method of the present invention, prepared by the Steel Fiber Reinforced Self-compacting Concrete include first determining satisfaction
The match ratio of the self-compacting concrete for being not spiked with steel fibre that Construction index is required forms benchmark match ratio, then the benchmark again
Carry out selecting the steel fibre of different addition quantity on the basis of match ratio, sand coarse aggregate ratio, diminishing are carried out to the steel fibre match ratio of minimum volume
A series of adjustment such as agent, the ratio of mud, and extend compared with normal concrete when stirring, then detect that tensile strength, bending resistance are strong by reviewing
Degree and toughness index etc., to obtain optimal test chamber match ratio, to determined by, optimum mix carries out on-site concrete pumping
Test, according to requirement of engineering is met, finally gives the Steel Fiber Reinforced Self-compacting Concrete for meeting construction production requirement.
The further improvement of construction method of the present invention, the steel fibre of the minimum volume need to detect steel fiber reinforced concrete
Tensile strength, bending strength and toughness index etc., so that it is determined that meet mechanics with deformation index request steel fibre kind and
Minimum volume.
The further improvement of construction method of the present invention, the step 2) prepared by Steel Fiber Reinforced Self-compacting Concrete be used for walk
It is rapid 1) in concreting beam and plate include carrying out the pumping of Steel Fiber Reinforced Self-compacting Concrete to transfer floor beam and plate and pour.
The further improvement of construction method of the present invention, in the pumping procedure of the Steel Fiber Reinforced Self-compacting Concrete, works as arrangement
During pump line, elbow is avoided as far as possible, it is impossible to as far as possible using 135 ° of elbows when avoiding.
The further improvement of construction method of the present invention, in the pumping procedure of the Steel Fiber Reinforced Self-compacting Concrete, pump machine
Power ratio normal concrete pump machine is big by 20%.
The further improvement of construction method of the present invention, removing when pouring for the Steel Fiber Reinforced Self-compacting Concrete are relied on from heavy sensation of the body
Template stranger's work mallet can also be coordinated outside power to tap.
Compared to prior art, the present invention has the advantages that：By step 1 to step 4, the present invention realizes that steel is fine
Dimension self-compact concrete in construction, wherein step 1) in need to carry out front preparation of constructing before construction, march into the arena including construction material, construct
Personnel depaly, job site Ground arrangement, preparation scheme of Steel Fiber Reinforced Self-compacting Concrete etc.；Then unwrapping wire is measured again；
Formwork includes the formwork to pillar, beam and plate；The reinforced bar engineering, it is contemplated that transitional beam arrangement of reinforcement is more, in order to ensure beam
The gap uniformity of interior reinforcing bar, therefore in post muscle colligation, it is necessary to adjust the array pitch of pillar cage bar；Carry out step 1) when while
The enforcement of step 2 is carried out, step 2 needs to carry out preparation and the Steel Fiber Reinforced Self-compacting Concrete of field apparatus, equipment and raw material
Prepare；Step 3, makes step 2) prepared by the Steel Fiber Reinforced Self-compacting Concrete be used for step 1) on the basis of transfer floor beam and
Plate, using the crossbeam that Steel Fiber Reinforced Self-compacting Concrete pouring reinforcement pole multipole is close, eliminates the difficulty vibrated, using steel fibre certainly
The good intensity of air-free concrete, crack resistance, effectively inhibit the thermogenetic thermal cracking of aquation, and steel fibre self-compaction are mixed
Solidifying soil efficiency of construction is fast, and construction quality is high, is more suitable for structure significant points or the conversion layer construction that has shockproof requirements higher
Feature, efficiently solves the problems, such as that transitional beam pours difficulty and construction quality is difficult to ensure that, reduces the probability done over again,
Reduce indirectly the expense that partly artificial, machinery is produced.
Description of the drawings
Fig. 1 is the flow chart of Steel Fiber Reinforced Self-compacting Concrete conversion layer construction of the present invention.
Specific embodiment
In order that the technological means of present invention realization, creation characteristic, reached purpose are more clear with effect and are apparent to,
Below in conjunction with the accompanying drawings 1 and specific embodiment the present invention is further elaborated：
The present invention proposes Steel Fiber Reinforced Self-compacting Concrete conversion layer construction, comprises the steps：
Step 1, beam successively to conversion layer, plate and post carry out construct front preparation, surveying setting-out, formwork, reinforced bar engineering；
Step 2, is carrying out step 1) when and carry out field apparatus, equipment and raw material preparation and steel fibre self-compaction it is mixed
It is prepared by solidifying soil；
Step 3, makes step 2) prepared by the Steel Fiber Reinforced Self-compacting Concrete be used for step 1) on the basis of conversion layer
Beam and plate, the step 1) on the basis of pillar carry out self-compacting concrete and pour；
Step 4, the maintenance and cooling of Steel Fiber Reinforced Self-compacting Concrete.
By step 1 to step 4, the present invention realizes that Steel Fiber Reinforced Self-compacting Concrete is constructed, wherein step 1) in construct before need
Carry out front preparation of constructing, march into the arena including construction material, workmen's configuration, job site Ground arrangement, steel fibre self-compaction
Preparation scheme of concrete etc.；Then unwrapping wire is measured again, and after under conversion layer, concrete floor slab placement is finished, construction and surveyor are immediately
Release control axis, and marked in plate face with the line of ink marker, set up conversion layer construction axial control network set up form bracing system before,
Need to release vertical rod control line, as benchmark, set up form bracing system, it is according to control axis, according to design working drawing, right
Conversion layer pillar, beam carry out O. gracilipes point ink, with ink fountain by O. gracilipes line bullet in floor face；Formwork is included to pillar, beam
With the formwork of plate, the pillar formwork should eject centrage and the surrounding sideline of post first before installing, and it is levelling to carry out post periphery,
Then the assembled complete rear lifting of post template is in place, and split bolt is installed in each piece of combination connection, and template leftover bits and pieces internal orifice should be black with bottom
Line aligns, and then corrects perpendicularity, leads to organ timbering in leftover bits and pieces carry, suitable for reading after hanging directly to draw the middle each column template of logical line correction, negative and positive
Angle is straight, and using the arch camber absolute altitude that the beam bottom of survey is argued for the sake of arguing on absolute altitude and two newel post's muscle is copied, bracing wire is simultaneously adjusted the beam forms formwork
Adjustable jacking in beam lower bracing frame, nut, the part that exposes of adjustable jack are not to be exceeded 200mm, make which with mark after adjustment
High control line matches, then carries out bed die installation, carries out checking, checks after completing, and will adjust in time after finding deviation makes which
Design and the requirement of job specfication is reached, as the section of transitional beam is larger, height is higher, and and adopts wooden model plate body
System, if assembled at the scene, relatively difficult, installation quality is also not easy to ensure.So, should be previously according to each crossbeam
Size carries out side template processing and fabricating, and drills through split bolt hole, because crossbeam sectional dimension is larger, in order to ensure the disconnected of beam
Face size, shortens the model sheetinstallat time, puts and deck-siding size phase at the medium position that can take and beam suitable for reading in side template
Same liner reinforcing bar, liner reinforcing bar have to pass through Profile cut-off machine cutting and form, in case template, steel in crossbeam are damaged in protector end
Muscle is closeer, when split bolt is worn in case of, at original default split bolt hole, if there is reinforcing bar to stop, taken advantage of one's position and power just
Take the redrilling of formula electric drill and install, after Screw arbor with nut at both-ends is installed, made with steel pipe immediately the back of the body thick stick side template is carried out reinforcing,
Correction, it is contemplated that the beam of conversion layer than larger, so in the bracing frame under transitional beam, vertical supporting bar bottom should be pacified
If feet a tree, used in making timber for boats, to increase the compression area of montant bottom, adjustable jacking is installed at the top of montant, to facilitate adjustment beam bottom board
The position of plate, can be oblique using "eight" shape is set up on the basis of original stress bracing frame under beam as crossbeam H >=1000mm
Support installs the measures such as jacking support to strengthen its stability to beam slab span centre；The plate formwork is by adjusting scaffold jacking
Absolute altitude, is transferred to predetermined height, lays main joist on adjustable jack supporting plate, and main joist sets up secondary joist after fixing, so
The installation form on secondary joist, during bed board, can close up middle from surrounding paving afterwards；The reinforced bar engineering, it is contemplated that conversion layer
Crossbeam arrangement of reinforcement is more, in order to ensure the gap uniformity of reinforcing bar in beam, therefore in post muscle colligation, it is necessary to adjust pillar cage bar
Post muscle, during such as local post muscle array pitch inequality, should be carried out adjustment by 1: 6 gradient so as to be uniformly distributed, be additionally, since by array pitch
Post muscle needs bent anchor in conversion layer, and the angle requirement of horizontal bent anchor section is very strict, so post muscle joint can only be using " just
Anti- screw-thread ", it is to avoid the lateral displacement of horizontal bent anchor section, in post, stirrup must be constructed by design requirement, forbid leakage occur to tie up mistake
Prick phenomenon, due to transitional beam section it is very big, the arrangement of reinforcement number of plies and quantity it is many, weight is big, therefore, the binding method of crossbeam is then
Using conventional improving bud grafting, and hanging improving bud grafting can not should be taken, and steel tube frame be set up above beam base plate position, use
In putting and colligation beam steel, otherwise the colligation quality of beam and beam muscle cushion block cannot meet design and code requirement, in mounting rail
During reinforcing bar, it is also expressly noted that at bean column node：When beam steel passes through pillar, it is necessary to strictly put by beam main tendon spacing
Put, one-time-reach-place, as number of steel bars is more in beam, if beam steel is when through post muscle, occurs to collide, answer appropriate adjustment column
Sub- cage bar spacing and beam main tendon spacing can not be adjusted, and consider transfer floor beam arrangement of reinforcement it is very many, and stirrup, straight muscle also compared with
Greatly, conventional 135 ° of crotches of stirrup, will affect the colligation of beam internal upper part stress longitudinal reinforcement when anchorage length is longer, therefore, greatly
Beam stirrup can solve this problem using single-sided welding closing ring；Carrying out step 1) when while carry out the enforcement of step 2, walk
Rapid 2 need to carry out the preparation of field apparatus, equipment and raw material and Steel Fiber Reinforced Self-compacting Concrete preparation；Wherein field apparatus,
The preparation of equipment and raw material includes installing numerical control proportioning machine, steel-fiber diffusing machine, forced mixer, need to adjust one by one using before
Examination, it is ensured that can normal work, concrete pump machine, bar cropper, angle-bender, reinforcing bar be upset and screw-rolling machine, electric welding machine, tower
Needed for the construction such as formula crane, circular saw, planer, main equipment and equipment maintain a good state, other small machines and equipment one
March into the arena with 1d in advance, the preparation of the raw material is included to materials such as the pole steel tube in the support system marched into the arena, horizon bars
The certification of fitness, production licence, quality inspection report are checked, and to its surface perception, weight, wall thickness, welding quality
Inspected by random samples etc. physical index, by design mixture proportion and moduling plan establishment materials arrival plan (design mixture proportion and based on pouring
Draw establishment materials arrival to plan to be formulated according to detailed programs situation in set-up procedure before construction), all material shifts to an earlier date 1d and marches into the arena,
When Steel Fiber Reinforced Self-compacting Concrete raw material is marched into the arena, except checking to its certification of fitness prescribed paper etc., steel should be also carried out
The sampling observation of fiber, including its tensile strength, bending performance, dimensional discrepancy and impurity content etc. is checked, checks which when sandstone is marched into the arena
Moisture content, proposes coordination in works.1 water content ratio of aggregate is checked at least per machine-team, when water content ratio of aggregate has significant change, should
Increase and determine number of times, and material usage should be adjusted in time according to testing result；Prepared by the Steel Fiber Reinforced Self-compacting Concrete include
Cement should adopt portland cement or Portland cement, and grade is 42.5, and cement enters machine temperature and is not to be exceeded 60 DEG C.Thick bone
Material should adopt continuous grading, clay content not to should be greater than 1%, and maximum size of coarse aggregate should be less than 16mm and less than length of steel fiber
2/3, flat-elongated particles content is less than 5%, and fine aggregate should adopt middle sand (modulus of fineness be 2.5～3.0) of the second level with area, contain
Mud amount is not more than 3%, and Steel Fiber Reinforced Self-compacting Concrete water-cement ratio should be between 0.3 to 0.45, and gel material content is not less than
360kg/m3, cement consumption is less than 400kg/m3, flyash is using II level flyash.Slag powders are by self-compacting concrete requirement
To select, retardation setting type high performance water reducing agent of polyocarboxy acid of the water reducer using water-reducing rate more than 30%, length of steel fiber, section are straight
Footpath, draw ratio, tensile strength etc. should meet design requirement, and Jing researchs, draw ratio too conference affect its self-compacting ability, it is proposed that adopt
With the steel fibre that length is in 20mm to 35mm and draw ratio is less than 60, volume content of steel fibers is preferably in every cubic metre of 20kg-25kg, coagulation
The control of the native mixture slump should be in 240～280mm, and slump divergence should should be in 5～20S, U in 600～700mm, T500
Box highly reach more than 320mm, Steel Fiber Reinforced Self-compacting Concrete conversion layer typically adopt high-strength concrete, here be given C50,
The reference table 1 of C60 Steel Fiber Reinforced Self-compacting Concretes,
Table 1
Step 3, makes step 2) prepared by the Steel Fiber Reinforced Self-compacting Concrete be used for step 1) on the basis of conversion layer
Beam and plate, using the crossbeam that Steel Fiber Reinforced Self-compacting Concrete pouring reinforcement pole multipole is close, eliminate the difficulty vibrated, big pouring
At beam and bean column node, template external demand coordinates artificial mallet to tap, and judges whether concrete is closely knit according to sound, notices that observation is mixed
Solidifying soil flush is no longer decreased obviously, and bubble no longer occurs, till surface glows mortar, due to plate suqare greatly, but has vibrated
Come relatively easy therefore less demanding to self compacting ability, so can be with addition to adopting the Steel Fiber Reinforced Self-compacting Concrete
Using steel fiber reinforced concrete, but will being consistent property with the raw material selection of beam column concrete；The step 1) on the basis of post
Son carries out self-compacting concrete and pours；For conversion layer pillar compares beam, depth of section is not very big, is typically not in mixed
The disadvantage that solidifying soil occurs, therefore, pillar concrete is poured using self-compacting concrete, and after having poured, template external demand coordinates artificial
Mallet is tapped, and judges whether concrete is closely knit according to sound, notices that observing concrete surface is concordantly no longer decreased obviously, and no longer goes out
Existing bubble, till surface glows mortar, need according to concrete Practical Project pump tube length, story height pillar need to be poured from
Air-free concrete carries out pre-control so that before pouring with crossbeam Steel Fiber Reinforced Self-compacting Concrete after the completion of pillar concreting,
Pump truck concrete has just been beaten, and supplements the Steel Fiber Reinforced Self-compacting Concrete of crossbeam when pump truck is remaining few in advance in time, protects
The seriality of card pumping；Step 4), when maintenance and the cooling of Steel Fiber Reinforced Self-compacting Concrete include construction, steel fibre self-compaction is mixed
Layer of plastic film is covered immediately behind solidifying soil receipts face or adds the additional straw mattress heat-insulation layer of two-layer gunnysack to make concrete form itself maintenance,
Cover thin film fencing lawn on gunnysack again, arrange special messenger to be responsible for maintenance, and to carrying out temperature test inside and outside concrete, and enter
Trip temperature monitor in real time, if the temperature difference is still consistently greater than 25 °, can thicken to plastic sheeting, till the temperature difference is less than 25 °, summer
Temperature is high, and the concrete for just having poured should avoid sunlight from directly shining during conserving as far as possible, in case the moisture content in concrete is too fast lost
And cause concrete cracking；By the method using the good intensity of Steel Fiber Reinforced Self-compacting Concrete, crack resistance, effectively inhibit
The thermogenetic thermal cracking of aquation, and Steel Fiber Reinforced Self-compacting Concrete efficiency of construction is fast, construction quality is high, is more suitable for structure
The characteristics of significant points or the conversion layer for having shockproof requirements higher are constructed, efficiently solves transitional beam and pours difficulty and construction
The problem of difficult quality guarantee, reduces the probability done over again, and reduces indirectly the expense that partly artificial, machinery is produced.
As specific embodiment, step 2) in first carry out the preparation of field apparatus, equipment and raw material, then carry out steel fine
The preparation of dimension self-compacting concrete, by just conveniently carrying out steel fibre from close after being ready to of field apparatus, equipment and raw material
The preparation of real concrete.
Used as specific embodiment, the Steel Fiber Reinforced Self-compacting Concrete is prepared and meets Construction index requirement including first determining
The match ratio of the self-compacting concrete for being not spiked with steel fibre form benchmark match ratio, the then basis of the benchmark match ratio again
On carry out select different addition quantity steel fibre, sand coarse aggregate ratio, water reducer, ratio of mud etc. is carried out to the steel fibre match ratio of minimum volume
Series adjustment, and extend compared with normal concrete when stirring, then by reviewing detection tensile strength, bending strength and toughness index
Deng, to obtain optimal test chamber match ratio, the optimum mix to determined by carry out on-site concrete pumping test, according to satisfaction
Requirement of engineering, finally gives the Steel Fiber Reinforced Self-compacting Concrete for meeting construction production requirement.
Used as specific embodiment, the steel fibre of the minimum volume needs to detect the tensile strength of steel fiber reinforced concrete, resists
Curved intensity and toughness index.
As specific embodiment, the step 2) prepared by Steel Fiber Reinforced Self-compacting Concrete be used for step 1) in concrete
The beam and plate for pouring includes carrying out the pumping of Steel Fiber Reinforced Self-compacting Concrete to transfer floor beam and plate and pours that pumping steel fibre is certainly
The power of the pump of air-free concrete is bigger by 20% than the power for pumping the pump of normal concrete, and pumping procedure should keep which continuous
Property, in order to avoid interrupted pumping procedure makes Steel Fiber Reinforced Self-compacting Concrete the phenomenon of collophore occur, especially note being difficult to clean and pump
The larger pump line seam of pressurization pressure, the ratio of maximum size of coarse aggregate and diameter of conveying pipe, during below pumping height 50m, to rubble
Preferably greater than 1: 3, according to pump it is latter as the slump can lose the construction experience of 30mm or so, and in order to ensure steel fibre from close
Real concrete mixture characteristic requires that the conservative mixture for choosing slump 270mm, respectively according to different conventional pump line calibers
With the pump machine of theoretical conveying capacity, it is maximum in pump line that the building for below height 100m calculates Steel Fiber Reinforced Self-compacting Concrete
Level conversion fed distance reference table 2, when in Practical Project, selects suitable conveying Steel Fiber Reinforced Self-compacting Concrete pump line
Length, ground level pipe characteristic chamber length are not preferably less than the 1/5 of vertical tube, and are not preferably less than 15m, it should reduce pump line as far as possible curved
Head, to reduce the alluvial of pumping resistance and steel fiber reinforced concrete in pipe, such as needs elbow, plane planted agent to adopt as far as possible really
The seam mounting interface sealing ring of 135 ° of bend pipes and pump line, must not spillage, and pipe bent position add support to bear pump line weight
Amount, as Steel Fiber Reinforced Self-compacting Concrete lateral pressure is than larger, for avoiding pumping from causing excessive vibration, horizontal tube is preferably every certain
Distance is fixed with support, cushion, suspender etc., in order to exclude plugging, assembly and disassembly and cleaning pipeline；Vertical tube is preferably fixed with built-in fitting
On wall and post or floor preformed hole.
Table 2
As specific embodiment, can be to pumping in view of elbow in the pumping procedure of the Steel Fiber Reinforced Self-compacting Concrete
Journey is impacted, so when pump line is arranged, avoid elbow as far as possible, it is impossible to as far as possible using 135 ° of elbows when avoiding, and according to not
The maximum horizontal scaled distance that same caliber, the pump function of different conveying capacities reach is as a reference to arrangement pump line, the power of pump machine
It is bigger by 20% than normal concrete pump machine, using above measure after, effectively can make Steel Fiber Reinforced Self-compacting Concrete pumping resistance reduce,
The mix physical performance of pumping is good, little loss of slump.
Used as specific embodiment, the Steel Fiber Reinforced Self-compacting Concrete can also be matched somebody with somebody when pouring in addition to by self gravitation
Outside shuttering, artificial mallet forms the closely knit Steel Fiber Reinforced Self-compacting Concrete structure of uniform quality after tapping and making hardening.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, which all should be covered at this
In the middle of the right of invention.
Claims (8)
1. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction, it is characterised in that comprise the steps：
1) beam successively to conversion layer, plate and post carry out construct front preparation, surveying setting-out, formwork, reinforced bar engineering；
2) carrying out step 1) when and carry out preparation and the Steel Fiber Reinforced Self-compacting Concrete system of field apparatus, equipment and raw material
It is standby；
3) make step 2) prepared by the Steel Fiber Reinforced Self-compacting Concrete be used for step 1) on the basis of transfer floor beam and plate, institute
State step 1) on the basis of pillar carry out self-compacting concrete and pour；
4) maintenance and cooling of Steel Fiber Reinforced Self-compacting Concrete.
2. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 1, it is characterised in that：Step 2) in first
The preparation of field apparatus, equipment and raw material is carried out, the preparation of Steel Fiber Reinforced Self-compacting Concrete is then carried out.
3. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 1, it is characterised in that：The steel fibre
Prepared by self-compacting concrete include first determining matching somebody with somebody for the self-compacting concrete for being not spiked with steel fibre for meeting Construction index requirement
Composition and division in a proportion forms benchmark match ratio, then carries out again selecting the steel fibre of different addition quantity on the basis of the benchmark match ratio, to most
The steel fibre match ratio of little volume carries out a series of adjustment such as sand coarse aggregate ratio, water reducer, the ratio of mud, and prolongs compared with normal concrete when stirring
It is long, then by reviewing detection tensile strength, bending strength and toughness index etc., to obtain optimal test chamber match ratio, to really
Fixed optimum mix carries out on-site concrete pumping test, and according to requirement of engineering is met, finally giving satisfaction construction production will
The Steel Fiber Reinforced Self-compacting Concrete asked.
4. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 3, it is characterised in that：The minimum is mixed
The steel fibre of amount needs to detect tensile strength, bending strength and toughness index of steel fiber reinforced concrete etc., so that it is determined that meeting power
Learn the kind with the steel fibre of deformation index request and minimum volume.
5. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 1, it is characterised in that：The step 2)
Prepared Steel Fiber Reinforced Self-compacting Concrete be used for step 1) in concreting beam and plate include entering transfer floor beam and plate
The pumping of row Steel Fiber Reinforced Self-compacting Concrete and pour.
6. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 5, it is characterised in that：The steel fibre
In the pumping procedure of self-compacting concrete, when pump line is arranged, elbow is avoided as far as possible, it is impossible to as far as possible curved using 135 ° when avoiding
Head.
7. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 5, it is characterised in that：The steel fibre
In the pumping procedure of self-compacting concrete, the power ratio normal concrete pump machine of pump machine is big by 20%.
8. Steel Fiber Reinforced Self-compacting Concrete conversion layer construction according to claim 5, it is characterised in that：The steel fibre
Template stranger's work mallet that can also coordinate in addition to by self gravitation when pouring of self-compacting concrete is tapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032943.8A CN106522551A (en) | 2016-11-18 | 2016-11-18 | Steel fiber self-compacting concrete construction method for conversion layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032943.8A CN106522551A (en) | 2016-11-18 | 2016-11-18 | Steel fiber self-compacting concrete construction method for conversion layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106522551A true CN106522551A (en) | 2017-03-22 |
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| CN201611032943.8A Pending CN106522551A (en) | 2016-11-18 | 2016-11-18 | Steel fiber self-compacting concrete construction method for conversion layer |
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