CN108590008A - Fold shape roof system cast-in-place concrete construction method - Google Patents
Fold shape roof system cast-in-place concrete construction method Download PDFInfo
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- CN108590008A CN108590008A CN201810417423.1A CN201810417423A CN108590008A CN 108590008 A CN108590008 A CN 108590008A CN 201810417423 A CN201810417423 A CN 201810417423A CN 108590008 A CN108590008 A CN 108590008A
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
- E04B7/028—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs consisting of structures of pyramidal or conical shape
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
- E04B7/06—Constructions of roof intersections or hipped ends
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Physics & Mathematics (AREA)
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- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention relates to a kind of folding shape roof system cast-in-place concrete construction method, step is：1) measure and position absolute altitude control, three-dimensional modeling is carried out with BIM technology, the absolute altitude value of all beams of Sloping roof, plate interface point is marked in the three-dimensional model, 2) steel bar meter makes and constructs, all cant beams, slab muscle carry out the real sample configuration in scene, 3) cant beam board concrete, which pours, smashes construction, pours sequence and is：Column, beam, inclined plate；Casting direction is：Overall cloth piecewise from low to high, every section from high to low, using the natural fluidity of concrete, gradually extends cloth to lower；The big roofing beam slab of gradient is first poured, is gradually extended to the small roofing of gradient.Roofing construction is：Control is global, breaks the whole up into parts, plane control position, vertically controls absolute altitude.Whole complicated contignation is reduced to single span or single component, then single component is combined, by the control line traffic control Liangping face position of flooring, controls the absolute altitude of interface point upwards from the unified elevation control point of pillar.
Description
Technical field
The present invention relates to a kind of folding shape roof system, especially a kind of folding shape roof system cast-in-place concrete construction that gradient is larger
Method.
Background technology
Fine pursuit with the development and people of construction industry to architectural appearance, moulding of the building designers for building
It is required that also more and more perfect, the building of various moulding is come into being, especially the moulded of public building, Facade form and room
Face moulding is more rich and varied.At construction industry development initial stage, most of moulding are realized by forms such as steel construction, timber structures, with
It construction industry further to develop, the various moulding of various materials have also obtained the favor of architect, wherein more use
Cheap and good-quality armored concrete moulding.Different moulding, it is different to the construction requirement of armored concrete.Relatively common
There are a small amount of batter post, cant beam and roofing inclined plate etc. to carry out interspersing decoration.
Large size folds shape Sloping roof and is made of multiple irregular triangles, quadrangle etc., in more facade rugosities (figure
1), Vierendeel girder is set under plate, roofing integral layout is intermediate inclined-plane arrangement high, periphery is low, is rolled over by a large amount of triple diamond
Side, forms unique multi-panel diamond, and different style is shown with ultramodern strong visual perception.Roofing construction is total
Body thinking is：Control is global, break the whole up into parts, plane control position, facade vertically control absolute altitude.I.e. whole complicated contignation letter
Single span or single component are turned to, then single component is combined, by the control line traffic control Liangping face position of flooring, from pillar
Unified elevation control point control the absolute altitude of interface point upwards.
Invention content
The technical issues of the present invention is to solve the large-scale cast-in-place concrete constructions for folding the oblique roof system of shape, provides a kind of folding
Shape roof system cast-in-place concrete construction method.
The technical scheme is that：A kind of folding shape roof system cast-in-place concrete construction method, step are：
1) measure and position absolute altitude control
(1) it is inclined-plane for roofing beam slab, multi-angle folds, and inclined-plane is more, and angle change is big, and the oblique absolute altitude of beam slab is fixed
Position difficulty is big, three-dimensional modeling is carried out by Deepen Design and using BIM technology, in the three-dimensional model to all beams of Sloping roof
The absolute altitude value of plate interface point is labeled, and solves the problems, such as that the oblique absolute altitude positioning difficulty of beam slab is big；
(2) it is directed to and folds the variation of shape Sloping roof beam slab framed bent scaffolding height greatly, absolute altitude control difficulty is big, according to threedimensional model
The absolute altitude of drawing and mark carries out live checking calculation, uniformly carries out 1 meter of absolute altitude control line in frame column main reinforcement at the scene, arranges
Frame is set up when being installed with beam bottom board, and the stringent absolute altitude value for controlling cant beam plate junction solves the problems, such as absolute altitude control；
(3) being directed to folding shape Sloping roof beam slab, there are a large amount of triangle corner treatments, Liang Yuliang, beam and plate, plate and plates
Handing-over piece it is complicated, first in flooring position unwrapping wire, determine that the position of beam bottom board, beam bottom board location and installation are completed and fixed
Afterwards, it then determines beam side size, prepares side template, solve dimensional discrepancy caused by Sloping roof beam slab folding angles with this and spell
Seam problem；
2) steel bar meter makes and constructs
(1) it is directed to the size disunity for folding shape Sloping roof beam reinforced steel bar, length changes greatly, and template is after installation is complete, by
It is a to measure each inclined-plane contignation size, and design drawing is combined, carry out steel bar meter making；
(2) difficult with binding due to folding the installation of shape Sloping roof beam reinforced steel bar, the arrangement of crossover location reinforcing bar is concentrated；At the scene
The bean column node concentrated to reinforcing bar arrangement is reconnoitred and is measured in advance, is adjusted to blank size and length, is ensured each fold plane
The intensive oblique beam reinforced steel bar in intersection is orderly bound；
(3) gradient is more than the inclined-plane beam reinforced steel bar at 25 degree angles after installation is complete, by the beam reinforced steel bar top of inclined slope aspect into
Row fix, anchor into column should be fixed with column reinforcing bar, no column position and top cross-bar reinforcing bar are fixed, effectively prevent beam
Plate muscle is glided, is deformed.
3) construction of Sloping roof beam slab casting and compacting of concrete is folded
(1) for folding, Sloping roof pouring molding is relatively difficult, and when especially angle is larger, concrete is particularly easy to down
It is sliding, before pouring, gradation design is carried out to cast-in-place concrete, gradient should also carry out pouring experiment when being more than 25 degree of angles；Coagulation
The slump of soil is controlled in 100 ± 20mm, is kept lower trickling property, is prevented concrete from gliding in inclined-plane template and lead to not
Molding；The big inclined-plane beam slab of gradient is first poured in principle, is gradually extended to the small Sloping roof of gradient；Pouring sequence is：Column
→ cant beam → inclined plate；Overall casting direction is：From low to high, it and is poured and is smash paragraph by paragraph from low to high according to bevel angle, angle is bigger,
Segments is more.Each section is poured when smashing, and using concrete trickling property, pours smash from high to low.
(2) roofing surrounding beam is large-section beam, the lateral pressure generated when to prevent Sloping roof from pouring, to big beam side and
Framed bent causes impact, generates the risk factors such as displacement, in 2/3 height of roofing surrounding crossbeam, stays and sets horizontal construction joint, complete first
It is poured at construction joint first time below, after the concrete that first time pours reaches some strength, tissue pours the 2/3 of crossbeam
Above concrete.It is secondary to pour the final setting time that interval time is later than concreting for the first time；Construction joint above section
Before pouring, area moist is first poured in reply, then is carried out with concrete magma connecing slurry processing；
(3) more for Sloping roof folding, water chestnut intractability is big at folding, before concreting, is welded in folding position
Break positioning and absolute altitude control reinforcing bar are connect, bracing wire is carried out to each break elevation control, bracing wire position is cant beam plate folding position,
Sound assurance is provided for cant beam plate folding angles and the control of face absolute altitude；
(4) larger for large-scale folding Sloping roof one-time-concreting side amount, difficulty of construction is big, and speed of perfusion is slow, Commercial Concrete
Supply rate controls difficulty, easily forms cold seam；It is excessive that head workload is received after continuous placing simultaneously, by using post-cast strip, is increased
Construction joint pours entire roofing piecemeal and smashes construction, reduces to pour every time and smashes work surface, more than effective solution two hang-ups；Construction joint
Way, water-proofing treatment are identical as post-cast strip, width 800mm, and block simultaneously, increase additional muscle, concrete label in beam slab position
Increase the micro-expanding agent of level-one and addition 8%；After the completion of the layer cleaning of face, increase by one of additional waterproof course as enhancement layer, subsequently
Whole large-area construction is connect with adjacent structure.
Folding shape inclined-plane beam slab uses automotive pump disturbing concrete, the region that can not be covered to carry out cloth using tower crane, will
Concrete bucket special is placed on the position of roofing relatively flat, and first concrete is poured into hopper with automotive pump, recycles tower crane
It is short back and forth to refute handling being poured in the blind area that concrete handling to automotive pump can not cover, solve what pump truck blind area can not pour
Problem.
Gradient is poured more than the inclined-plane beam slab at 25 degree of angles and is smash, and anti-slip reinforcing bar grid, spacing 1500-2000mm is arranged.It pours
When building, when concrete trickling is to anti-slip reinforcing bar grid, it can be stopped, play the role of retention, prevent concrete from concentrating stream
It drops down to cant beam plate root.
Sloping roof beam slab pours mode：Sloping roof plate pour sequence be：Whole paragraph by paragraph pouring from bottom to top, each section from upper
And lower cloth is covered with inclined-plane using the mobility of concrete；It is more than the roofing Board position at 25 degree of angles in gradient, inclined-plane pours
Build several times from below to up carry out cloth pour；It pours every time by this section of the top cloth, pours part concrete below；Under
When one section concrete pours completion and closes on initial set, starts to pour a section concrete thereon and pour；After the completion of concreting, just
It is further polished using the wooden crab before solidifying and folds shape roofing shape；It is less than the roofing Board position at 25 degree of angles in gradient, inclined-plane pours
Building can be poured with one piece cloth, and distributing mode is from top to bottom.
Sloping roof beam slab vibrate sequence be：It is overall gradually to extend from below to up to roof, each section from the top down cloth shake
It smashes, using the mobility of concrete, inclined-plane is abound with；Accomplish when vibrating uniformly, not leak source, the time that vibrator is extracted cannot mistake
Long, same time of vibration can not be long, prevents concrete from integrally gliding.
The beneficial effects of the invention are as follows：
The present invention carries out three-dimensional modeling by using BIM technology, determines the live absolute altitude of cant beam plate interface point absolute altitude value guidance
Positioning；Steel bar meter review is carried out by field measurement actual quantities, the oblique beam reinforced steel bar that 25 degree of angles are more than to gradient carries out effectively
It is fixed, it effectively prevent beam slab muscle to glide, deformation；Stringent to carry out concrete gradation design when casting and compacting of concrete is constructed, control concrete collapses
Degree of falling, and use automotive pump cloth.The control of cant beam board finish absolute altitude is carried out by break bracing wire.Sloping roof gradient is more than 25 degree
When angle, anti-slip reinforcing bar grid is set, prevents concrete from concentrating trickling to root, and is poured by segmentation and smashes from below to up gradually cloth
Mode, it is ensured that concrete construction is smooth and ensures uniformly closely knit.The above innovative technology solves the large-scale cast-in-place coagulation for folding shape roofing
The technical barrier of soil construction faced realizes architect using a large amount of, different style, with their own characteristics triple diamond folding
The gimmicks such as side, multi-panel diamond, show the ultramodern strong visual perception of building, increase infinite glamour for building.
Description of the drawings
Fig. 1 is the special-shaped roofing schematic diagram of polygon triple diamond；
Fig. 2 is the oblique absolute altitude positioning graphics of beam and plate；
Fig. 3 is the oblique absolute altitude positioning plan view state of beam and plate；
Gradually extend cloth schematic diagram to bottom when Fig. 4 is concreting；
Fig. 5 is that anti-slip reinforcing bar grid and baffle schematic diagram is arranged on Sloping roof plate；
Fig. 6 is to increase part resistance in skewback reinforcing bar to slip grid schematic diagram；
Fig. 7 is that skewback pours one schematic diagram of sequence；
Fig. 8 is that skewback pours two schematic diagrames of sequence；
Fig. 9 is that beam and roofing pour schematic diagram in two times；
Figure 10 is that progress bracing wire schematic diagram between elevation control point is utilized after the completion of pouring；
Figure 11 is to increase by 2, north-south construction joint roofing is divided into 4 piecemeal schematic diagrames；
Figure 12 is the folding shape roof system cast-in-place concrete construction method flow diagram of the present invention.
Specific implementation mode
As shown in figure 12, folding shape roof system cast-in-place concrete construction method of the invention, main construction procedure and technology control
Making point is：
1) positioning absolute altitude control：
(1) roofing beam slab is inclined-plane, and angle change is big, and the inclined-plane of template configuration is more, the oblique absolute altitude positioning of beam and plate
Difficulty is big.By Deepen Design, BIM technology, carry out three-dimensional modeling (Fig. 2,3), in the three-dimensional model to all beams of Sloping roof,
The absolute altitude value of plate interface point marks, and solves the problems, such as that the oblique absolute altitude positioning difficulty of beam slab is big.
(2) greatly, absolute altitude control difficulty is larger for oblique roofing framed bent scaffolding height variation.According to threedimensional model drawing and mark
Absolute altitude, carry out live checking calculation, 1 meter of absolute altitude control line uniformly carried out in frame column main reinforcement at the scene, then in the row of setting up
Frame and the joint absolute altitude value that beam bottom plate is controlled when setting up beam bottom plate, effectively solve absolute altitude control problem.
(3) a large amount of triangle corner treatments, the handing-over piece of Liang Yuliang, beam and plate, plate and plate are more complicated.Exist first
Flooring position unwrapping wire after determining that the position of beam bottom plate, beam bottom plate position and set up completion and fix, then determines the ruler of plate by beam
It is very little, then other plate is prepared, it effectively solves to answer dimensional discrepancy caused by oblique angle and piece difficulty.
2) steel bar meter makes and constructs
(1) the size disunity of inclined-plane roofing plate-girder, slab muscle, length change greatly.At the scene after the completion of carpenter's formwork
Beam, plate face measure each structure size one by one, and in conjunction with design drawing, beam steel is carried out according to all beams, the real sample in plate scene
Configuration, rationally solves the problems, such as that change in size is big.
(2) folded plate, folding beam angle disunity, variation is big, and it is more complicated with dispensing to turn over sample calculating.Carpenter's formwork is complete at the scene
Beam, plate face after, measure each structure size one by one, in conjunction with design drawing, are carried out according to all beams, the real sample in plate scene
Beam steel configures, while solving the problems, such as to turn over sample and dispensing complexity.
(3) reinforcement installation of oblique roofing and binding are relatively difficult, and the arrangement of crossover location reinforcing bar is concentrated.At the scene to reinforcing bar
The bean column node that arrangement is concentrated is reconnoitred in advance, is timely finely tuned to blank size and length, is intersected after ensureing reinforcing bar binding
The intensive problem of position overlapping arrangement.The bean column node concentrated at the scene to reinforcing bar arrangement is reconnoitred and is measured in advance, to blanking ruler
Very little and length is adjusted, and ensures that the intensive oblique beam reinforced steel bar in each fold plane intersection is orderly bound；
(4) gradient is more than the inclined-plane beam reinforced steel bar at 25 degree angles after installation is complete, by the beam reinforced steel bar top of inclined slope aspect into
Row is fixed.Anchor into column should be fixed with column reinforcing bar, no column position and top cross-bar reinforcing bar are fixed.It effectively prevent beam
Plate muscle is glided, is deformed.
3) cant beam board concrete, which pours, smashes construction
(1) pouring molding of Sloping roof is relatively difficult, and concrete is easy to glide.
Before pouring, mixing plant is notified, the slump for controlling concrete is 100 ± 20mm, keeps the stream bottom of compared with as possible
Dynamic property prevents concrete being easy the problem of leading to not molding of gliding in inclined-plane template.
Pouring sequence is：Column (pouring in advance) → beam → inclined plate, as shown in figure 4, casting direction is：General direction from it is low to
High pour paragraph by paragraph is smash, every section from high to low cloth gradually extend cloth to lower using the natural fluidity of concrete.First pour
The big roofing beam slab of gradient gradually extends to the small roofing of gradient.Sloping roof beam slab uses automotive pump disturbing concrete.Nothing
The region of method covering carries out cloth using tower crane.Concrete bucket special is placed on the opposite position divided of roofing, uses automotive pump
Handlebar concrete is poured into hopper, short back and forth using tower crane being poured in the blind area that concrete handling to automotive pump can not cover
Handling is refuted, solves the problems, such as that pump truck blind area can not pour.Such as Fig. 5, shown in 6, it is more than the roofing Board position at 25 degree of angles in gradient,
Anti-slip reinforcing bar grid 1 and operation panel 2 are set, and anti-slip reinforcing bar grid 1 is mounted on the inside of plate bar-mat reinforcement, vertically arranged, operating surface
The face layer for the Sloping roof plate that plate 2 is arranged, uses vertical reinforcement to be laterally arranged as fulcrum, anti-slip reinforcing bar grid 1 and operation panel 2,
Along cant beam plate along slope direction spacing be 1500-2000mm；1 transverse steel of anti-slip reinforcing bar grid continuously arranges, longitudinally fixed reinforcing bar
Spacing is 1500-2000mm；Laterally completely paving steel bottom scar, vertical fixed steel bars spacing are 1500-2000mm to operation panel 2.It is anti-
The longitudinally fixed reinforcing bar of slip device is fixed in beam reinforced steel bar；The vertical fixed steel bars diameter of operation panel is not less than above and below 16mm, with beam
Layer reinforcing bar is welded, and the load of 400Kg can be born.It, can be by when concrete flow to anti-slip reinforcing bar grid when pouring
Blocking, plays the role of retention, waits concrete close to when initial set, manually extra concrete is shifted, and female crab polishing is used in combination
Go out facing planar state.Inclined-plane pours cloth and concrete vibrating mode：It is more than the roofing Board position at 25 degree of angles in gradient, inclined-plane pours
Whole point 2 clothes pour, as shown in fig. 7, starting cloth in 1/2 span location for the first time, pour half block plate A under inclined-plane, pour
After the completion of building, concrete is waited for close to the presetting period, as shown in figure 8, starting to pour the concrete of half block plate B.It is small in gradient
Roofing Board position in 25 degree of angles, inclined-plane pour whole 1 cloth and pour, and distributing mode is from top to bottom.
Bobbing machine to inclined plate vibrate sequence be：Gradually extend from bottom to top, using the mobility of concrete, inclined-plane is expired
Cloth accomplishes uniformly, not leak source that the time that bobbing machine is extracted cannot be long, can not prevent coagulation for a long time in the same point vibration
Native whole downslide.
(2) since roofing surrounding crossbeam is that superelevation cuts section bar (1.3m-1.9m), the side generated when to prevent Sloping roof from pouring
To pressure, the risk factors such as displacement impact can be caused to big beam side and framed bent, through being linked up with design, in the crossbeam of roofing surrounding
About 2/3 height is stayed and sets horizontal construction joint as shown in figure 9, completing construction joint first time below first pours C, according to live real
Border situation arranges to pour at any time the concrete of top roofing beam slab, and top is secondary to be poured D interval times and be later than concrete for the first time and pour
The final setting time built.The overall stability of outer ring crossbeam load-bearing support for shuttering and side form can be improved in the measure.It is more than construction joint
When part pours, watering moistening is done to first pouring position first, recycling concrete magma connect starching and handles and start to pour
Portion's concrete.
(3) Sloping roof break is more, and after pouring molding, break water chestnut position intractability is larger.Before concreting,
The control point of break position welded reinforcement absolute altitude and break change location, after the completion of pouring, using between elevation control point into
Row bracing wire (Figure 10), bracing wire position are folded plate position 4, convenient to find out out folded plate boundary and position when receiving head.
(4) since one-time-concreting side's amount is larger, difficulty of construction is big, and speed of perfusion is slow, and Commercial Concrete supply rate controls ratio
It is more difficult, easily form cold junction seam.Simultaneously after continuous placing, it is excessive to receive head workload.By to entire roofing except post-cast strip 6 with
Outside, increase by 2, north-south construction joint, roofing is divided into 4 piecemeal A1, A2, A3, A4 (Figure 11), reduces operation side, can have
The solution of effect because square amount greatly with construction surface it is too big caused by cold junction seam with receive working face problems of too.Increased construction joint way
Identical as roofing post-cast strip, width 800mm, beam slab position increases additional muscle identical with roofing post-cast strip, roofing post-cast strip envelope
Plugging construction stitches while stifled, and concrete adds 8% micro-expanding agent marked as increasing level-one on the basis of former beam slab concrete label.It applies
Work seam water-proofing treatment it is identical with post-cast strip, face layer cleaning after the completion of, increase by one of additional waterproof course as enhancement layer, subsequently with
The whole big surface construction of adjacent structure connection.
Claims (5)
1. a kind of folding shape roof system cast-in-place concrete construction method, which is characterized in that its construction procedure is：
1) measure and position absolute altitude control
(1) it is inclined-plane for roofing beam slab, multi-angle folds, and inclined-plane is more, and angle change is big, and the oblique absolute altitude positioning of beam slab is difficult
Degree is big, carries out three-dimensional modeling by Deepen Design and using BIM technology, hands in the three-dimensional model all beam slabs of Sloping roof
The absolute altitude value of contact is labeled, and solves the problems, such as that the oblique absolute altitude positioning difficulty of beam slab is big；
(2) it is directed to and folds the variation of shape Sloping roof beam slab framed bent scaffolding height greatly, absolute altitude control difficulty is big, according to threedimensional model drawing
And the absolute altitude of mark, live checking calculation is carried out, uniformly carries out 1 meter of absolute altitude control line in frame column main reinforcement at the scene, framed bent is taken
If installed with beam bottom board, the stringent absolute altitude value for controlling cant beam plate junction solves the problems, such as that absolute altitude controls；
(3) being directed to folding shape Sloping roof beam slab, there are a large amount of triangle corner treatments, the friendships of Liang Yuliang, beam and plate, plate and plate
Piece complexity is connect, first in flooring position unwrapping wire, after determining that the position of beam bottom board, beam bottom board location and installation are completed and fixed, then
It determines beam side size, prepares side template, dimensional discrepancy is asked with piece caused by solving Sloping roof beam slab folding angles with this
Topic；
2) steel bar meter makes and constructs
(1) it is directed to the size disunity for folding shape Sloping roof beam reinforced steel bar, length changes greatly, and template is measured one by one after installation is complete
Each inclined-plane contignation size is taken, and combines design drawing, carries out steel bar meter making；
(2) difficult with binding due to folding the installation of shape Sloping roof beam reinforced steel bar, the arrangement of crossover location reinforcing bar is concentrated；At the scene to steel
The bean column node that muscle arrangement is concentrated is reconnoitred and is measured in advance, is adjusted to blank size and length, ensures each fold plane intersection
Locate intensive oblique beam reinforced steel bar orderly to bind；
(3) gradient is more than the inclined-plane beam reinforced steel bar at 25 degree angles after installation is complete, and the beam reinforced steel bar top of inclined slope aspect be consolidated
It is fixed, anchor into column should be fixed with column reinforcing bar, no column position and top cross-bar reinforcing bar are fixed, effectively prevent beam slab muscle
It glides, deformation.
3) construction of Sloping roof beam slab casting and compacting of concrete is folded
(1) for folding, Sloping roof pouring molding is relatively difficult, and when especially angle is larger, concrete is particularly easy to glide, and pours
Before building, gradation design is carried out to cast-in-place concrete, gradient should also carry out pouring experiment when being more than 25 degree of angles；Concrete collapses
Degree of falling is controlled in 100 ± 20mm, is kept lower trickling property, is prevented concrete from gliding in inclined-plane template and lead to not be molded；
The big inclined-plane beam slab of gradient is first poured in principle, is gradually extended to the small Sloping roof of gradient；Pouring sequence is：Column → cant beam
→ inclined plate；Overall casting direction is：From low to high, it and is poured and is smash paragraph by paragraph from low to high according to bevel angle, angle is bigger, segments
It is more.Each section is poured when smashing, and using concrete trickling property, pours smash from high to low.
(2) roofing surrounding beam is large-section beam, the lateral pressure generated when to prevent Sloping roof from pouring, to big beam side and framed bent
It causes impact, generate the risk factors such as displacement, in 2/3 height of roofing surrounding crossbeam, stay and set horizontal construction joint, complete to apply first
Work seam first time below pours, and after the concrete that first time pours reaches some strength, tissue pours 2/3 of crossbeam or more
Concrete.It is secondary to pour the final setting time that interval time is later than concreting for the first time；Construction joint above section pours
Before, area moist is first poured in reply, then is carried out with concrete magma connecing slurry processing；
(3) more for Sloping roof folding, water chestnut intractability is big at folding, before concreting, welds and rolls in folding position
Point location and absolute altitude control reinforcing bar, carry out bracing wire to each break elevation control, bracing wire position is cant beam plate folding position, is oblique
Beam slab folding angles and the control of face absolute altitude provide sound assurance；
(4) larger for large-scale folding Sloping roof one-time-concreting side amount, difficulty of construction is big, and speed of perfusion is slow, Commercial Concrete supply
Speed controls difficulty, easily forms cold seam；It is excessive that head workload is received after continuous placing simultaneously, by using post-cast strip, increases and constructs
Seam, which pours entire roofing piecemeal, smashes construction, reduces to pour every time and smashes work surface, more than effective solution two hang-ups；Construction joint is done
Method, water-proofing treatment are identical as post-cast strip, width 800mm, and block simultaneously, increase additional muscle in beam slab position, concrete label increases
Add the micro-expanding agent of level-one and addition 8%；Face layer cleaning after the completion of, increase by one of additional waterproof course as enhancement layer, subsequently with
The whole large-area construction of adjacent structure connection.
2. folding shape roof system cast-in-place concrete construction method according to claim 1, it is characterised in that：Fold shape hip rafter
Plate uses automotive pump disturbing concrete, the region that can not be covered to carry out cloth using tower crane, concrete bucket special is placed on room
The position of face relatively flat is poured into concrete in hopper with automotive pump, recycle tower crane concrete handling to automotive pump without
It is poured in the blind area of method covering, it is short back and forth to refute handling, solve the problems, such as that pump truck blind area can not pour.
3. folding shape roof system cast-in-place concrete construction method according to claim 1, it is characterised in that：Gradient is more than 25
The inclined-plane beam slab at degree angle, which pours, to be smash, and it is 1.5-2m that anti-slip reinforcing bar grid spacing, which is arranged,；When pouring, concrete flow to anti-slip reinforcing bar lattice
When grid, it can be stopped, play the role of retention, prevent concrete from concentrating trickling to cant beam plate root.
4. folding shape roof system cast-in-place concrete construction method according to claim 1, it is characterised in that：Sloping roof beam slab pours
Build mode：Sloping roof plate pour sequence be：Whole paragraph by paragraph pouring from bottom to top, each section of cloth from top to down, utilizes concrete
Mobility, inclined-plane is covered with；It is more than the roofing Board position at 25 degree of angles in gradient, inclined-plane pours segmentation and carries out cloth from below to up
Material pours；By this section of the top cloth when pouring, part concrete below is poured；Concreting is completed and closes on initial set
When, start to pour a section concrete thereon；It is further polished using the wooden crab after the completion of concreting, before initial set and folds shape room
Surface state；It is less than the roofing Board position at 25 degree of angles in gradient, inclined-plane, which pours, a cloth to be poured from top to bottom.
5. folding shape roof system cast-in-place concrete construction method according to claim 4, it is characterised in that：Sloping roof beam slab
It vibrates and is sequentially：It is overall gradually to extend from below to up to roof, each section from the top down cloth vibrate, utilize the flowing of concrete
Property, inclined-plane is abound with, is accomplished uniformly, not leak source, the time that vibrator is extracted cannot be long, and same time of vibration can not mistake
It is long, prevent concrete from integrally gliding.
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