CN111636677A - Construction process of assembly type building laminated slab post-cast plate strip support-free system - Google Patents
Construction process of assembly type building laminated slab post-cast plate strip support-free system Download PDFInfo
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- CN111636677A CN111636677A CN202010466388.XA CN202010466388A CN111636677A CN 111636677 A CN111636677 A CN 111636677A CN 202010466388 A CN202010466388 A CN 202010466388A CN 111636677 A CN111636677 A CN 111636677A
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- slab
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- laminated
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Classifications
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
Abstract
The invention discloses a construction process of a post-cast plate strip of an assembled building laminated slab without a support system, which comprises the following steps: a. erecting a template supporting system; b. measuring and paying off and sticking a sponge strip; c. hoisting and correcting the laminated slab; d.T type split screw installation; e. laying a water and electricity pipeline and binding a superposed layer of steel bars; f. pouring concrete on the superposed layer; g. and (5) removing the template. According to the invention, the T-shaped split bolt formed by welding the zero-material reinforcing steel bar head and the screw is pressed on the laminated slab, and the T-shaped split bolt and the supporting steel pipe below the template counteract the elastic deformation of the template caused by the vertical impact load on a template supporting system during hoisting and pouring concrete of the laminated slab in a mountain-shaped clamping split mode, so that the supporting system is simplified, the forming quality of a post-pouring slab band is ensured while construction is facilitated, the problems of slurry leakage and non-compaction are avoided, and the slurry leakage risk is further reduced by matching with the sponge strip.
Description
Technical Field
The invention particularly relates to a construction process of a post-cast plate strip of an assembled building laminated slab without a support system, and belongs to the technical field of building construction.
Background
Building roofs of fabricated monolithic concrete structures typically employ composite floor slabs. In order to ensure the horizontal force transmission effect and the structural integrity of the floor slab, an integral cast-in-place section is usually arranged on the side of the adjacent prefabricated composite slab. The composite floor slab is a better structure form combining prefabrication and cast-in-place concrete, and because the cast-in-place floor slab does not need to be provided with a formwork, and the large precast concrete partition boards can be simultaneously hoisted in the structural construction stage, the composite floor slab can be inserted into decoration engineering in advance, and the construction period of the whole engineering is shortened.
In the existing building construction, after the prefabricated composite slab is hoisted in place and the elevation is corrected, a formwork hoisting construction process is adopted at the position of the post-cast slab band, and the post-cast slab band steel bar binding and concrete pouring are carried out according to the design requirement. And (5) removing the template after the concrete strength of the post-cast plate belt meets the construction standard requirement. For the construction of the post-cast strip part, although various construction methods exist, the concrete forming effect is not good. At present, the common method is that steel pipe supports are arranged at the positions of post-cast plate strips, the supporting force is too large, the prefabricated composite floor slab is easy to jack up, and the flatness of the bottom of the slab is poor. The concrete forming effect is not good, and the construction convenience is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a construction process of a post-cast plate strip of an assembled building laminated slab without a support system, simplifies the support system, is convenient to construct, ensures the forming quality of the post-cast plate strip, and avoids the phenomena of slurry leakage and incompact.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the construction process of the post-cast slab band of the fabricated building laminated slab without a support system comprises the following steps:
a. erecting a template supporting system: flatly paving the templates of the whole top plate from two sides to the middle in the same sequence and the same direction;
b. measuring and paying off, and sticking a sponge strip: measuring and paying off the supported template, and accurately marking the position of the laminated slab; sticking a sponge strip along the line at the paying-off position;
c. hoisting and correcting the laminated slab: the laminated slab is horizontally hoisted, vertically and downwards installed from the top, and the elevation is checked;
d.T type split screw installation: a T-shaped counter-pulling screw is arranged at a hole in the middle of the post-cast slab band of the laminated slab, and the bottom of the template is clamped in a counter-pulling manner by combining double steel pipes and a mountain-shaped clamp;
e. laying water and electricity pipelines and binding laminated steel bars: laying water and electricity pipelines and binding steel bars of laminated slabs according to the requirements of drawings;
f. concrete pouring of the superposed layer: when the steel bars and the templates are qualified, cleaning the laminated slabs, sprinkling water and wetting, and then pouring concrete;
g. removing the template: and (4) removing the template support system after the floor concrete reaches the template removal strength specified by the specification.
Furthermore, keel supports are arranged below the butt seams in the step a.
Furthermore, the distance between the keel supports is not more than 2m, the height difference between each two adjacent keels is not more than 2mm, and the elevation deviation is not more than 3 mm.
Further, the laminated plate in the step c is kept horizontal by fine-tuning the vertical support. )
Furthermore, the short side of the laminated slab in the step c is installed to penetrate 10mm into the beam/shear wall.
Furthermore, in the step c, before the laminated slab is installed, the accuracy of the embedded position of the water and electricity pipeline is ensured.
Furthermore, the T-shaped counter-pulling screw rod in the step d is welded with a 14mm screw rod by using a zero-material reinforcing bar head with the diameter not less than 16mm to form the T-shaped counter-pulling screw rod "
Further, the middle position in the step d is a position which is not more than 250mm away from the beam edge and is not more than 850mm away.
Furthermore, the construction process also comprises the steps of cutting off and performing rust prevention treatment on the T-shaped counter-pulling screw rod exposed out of the concrete surface
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the T-shaped split bolt welded by the zero-material steel bar head with the diameter of more than 16mm in a construction site and the split screw is pressed on the laminated slab and is in split-draw with the support steel pipe below the template in a mountain-shaped clamping mode, so that the elastic deformation of the template caused by the vertical impact load on a template support system during the hoisting and pouring of the laminated slab is counteracted, the support system is simplified, the construction is facilitated, the forming quality of a post-pouring slab band is ensured, and the problems of slurry leakage and non-compaction are avoided; and the sponge strips are matched to further reduce the slurry leakage risk.
Drawings
FIG. 1 is a schematic view of the combination of a double steel pipe and a mountain clip for installing a counter pull according to an embodiment of the present invention;
in the figure: 1. 16mm short steel bars; 2. a laminated slab cast-in-place layer; 3. a laminated slab; 4. a sponge strip; 5. double steel pipes; 6. a template; 7. wood block; 8. a 14mm screw; 9. a mountain card.
Detailed Description
The invention is further described below. The following examples are only for illustrating the construction process and operation of the present invention more clearly, and should not be construed as limiting the scope of the present invention.
Construction process flow
Erecting a template support system → inspecting and accepting a laminated slab → measuring and paying-off → pasting a sponge strip → hoisting the laminated slab → correcting the laminated slab → installing a T-shaped split screw rod → cleaning the template → laying a water and electricity pipeline → binding a laminated layer steel bar → casting the laminated layer concrete → dismantling the template → processing the split screw rod.
The construction operation comprises the following specific steps:
example 1: formwork support system set-up
And (4) building a template support system according to the construction scheme of the approved laminated slab template support frame. For the concrete integrated into one piece effect of assurance, according to same order, the template 6 of whole roof is the butt joint tiling of same direction, sets up from both sides to the centre, must guarantee that seam department below has the fossil fragments. The formwork 6 and its support must be provided with adequate temporary fixing means during the installation process to prevent overturning. The support portion of the bracket should have sufficient support area.
Example 2: preparation before installation of laminated slab
(1) Preparation for incoming inspection and acceptance of laminated slab
Firstly, after the superimposed sheet 3 enters the field, the factory, the construction party and the supervision party carry out combined inspection and acceptance on the components transported to the field
And secondly, the construction party and the supervision party make a receiving and checking ledger and a record for the members and components of the approach, and specify the specific contents of the approach date, specification, model, using part, number, involved inspection personnel, inspection evaluation results and the like.
Identifying the superimposed plates 3 which do not meet the acceptance criteria by three parties, establishing a check book of the components of the back of the hall, and determining the specific contents of the date, specification, model, planned use part, serial number, participation of inspectors, inspection evaluation results and the like of the entrance and exit.
(2) Measuring the position of the paying-off and sponge strip pasting
And (3) carrying out measurement and paying-off on the erected template 6, accurately marking the position of the laminated slab 3, and sticking a sponge strip 4 along the paying-off position to prevent slurry leakage at the post-cast slab band of the laminated slab 3.
(3) Manufacture of T-shaped split screw
And (4) calculating the width type of the post-cast slab band in advance according to the construction drawing of the laminated slab 3, and determining the length of the cut reinforcing bar heads. The T-shaped counter-pull screw is welded by a zero-material reinforcing bar head with the diameter of 16mm or more and a 14mm screw 8. In the embodiment of fig. 1, the T-shaped counter-pulling screw is formed by welding a short steel bar 1 with the length of 16mm and a screw 8 with the length of 14 mm.
Example 3: hoisting and correcting laminated slab
1) The member is lifted off the ground, whether the member is basically horizontal or not and whether each lifting point is uniformly stressed or not are observed, and the member is lifted after the member is basically horizontal and all the lifting points are uniformly stressed.
2) According to the position of the member shown in the drawing and the direction of the arrow, in order to prevent a member factory from wrongly weaving the arrow, the relative positions of the reserved holes of the floor slab and the hydroelectric drawing are observed while the member is in place.
3) When the member is installed, the short edge of the member extends into the beam/shear wall by 10mm, and the long edge of the member is installed with the beam or the plate according to the design drawing requirements.
Example 4: t-shaped split screw installation and template cleaning
As shown in fig. 1, for the combination of the double steel pipes 5 and the chevron clamps 9, the installation schematic diagram is drawn, at the middle position of the post-cast slab band of the composite slab 3, a hole is formed at a position which is not more than 250mm away from the beam edge and is not more than 850mm in distance, and a T-shaped tie bolt is installed, the bottom of the template 6 is clamped by the combination of the double steel pipes 5 and the chevron clamps 9 in a drawing manner, so as to offset the elastic deformation of the template 6 caused by the vertical load of the template supporting system in the hoisting of the composite slab 3, thereby ensuring that the slab band is. The flitch 7 is installed at the bottom of template 6, protects template 6.
Example 5: binding of steel bars of laying and overlapping layer of water and electricity pipeline
After the T-shaped split bolts are installed on the post-cast strip of the laminated slab 3, laying of water and electricity pipelines and binding of the steel bars of the laminated slab 3 are carried out according to the requirements of drawings. When laying pipelines and binding steel bars, attention should be paid to protecting the installed T-shaped split bolts.
Example 6: concrete pouring of superimposed sheet
And when the steel bars and the templates are accepted, cleaning the surface and the side mold of the laminated slab 3, spraying water to moisten the surface and the side mold, and then pouring concrete to form a cast-in-place layer 2 of the laminated slab. When the post-cast strip of the laminated slab 3 is poured, a worker who looks at the mold should pay attention to the fastening of the mountain-shaped clamp 9, and if the problem is found, the reinforcement is immediately carried out.
Example 7: template removal and split bolt treatment
And after the floor concrete reaches the formwork removal strength specified by the specification, removing the post-cast slab with the formwork 6. The removed mountain-shaped cards 9 should be collected together for the next layer to be used. And cutting off the screw rod exposed out of the concrete surface in time and carrying out rust prevention treatment.
The construction quality control key points of the embodiment of the invention are as follows:
(1) the laminated slabs 3 are sequentially laid out as much as possible in the hoisting sequence, and are not suitable for interval hoisting.
(2) The installation of the superimposed slab 3 should control the horizontal elevation by fine-tuning the vertical supports.
(3) When the laminated slab 3 is installed, the accurate position of the water and electricity embedded pipe (hole) is ensured.
(4) The supporting distance of the laminated slab 3 is not more than 2m, the height difference between every two supports is not more than 2mm, the elevation deviation is not more than 3mm, the outer end of the cantilever slab is increased by 2mm as much as possible compared with the inner end support, and the two sides of the floor slab are required to be placed at +/-10 mm of the wall slab.
And after the laminated slab 3 is hung 30-50cm above the beam and the wall, the slab position is adjusted to stagger the plate strip flail rib and the beam stirrup, the slab is accurately positioned according to the control lines of the slab edges and the slab ends which are already released from the beam and the wall, the deviation is not more than 2mm, and the accumulated error is not more than 5 mm. After the plate is in place, the supporting upright posts are adjusted to ensure that all upright posts are completely stressed.
The construction method is strictly constructed according to requirements, the T-shaped split bolts are installed at the positions, which are not more than 250mm away from the beam edge and not more than 850mm away from the beam edge, and the bottom of the template 6 is clamped in a split mode by combining the double steel pipes 5 and the mountain-shaped clamps 9 so as to counteract the elastic deformation of the template 6 caused by the vertical load of the template supporting system when the laminated slab 3 is hoisted, so that the slab band is prevented from deforming during pouring.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The construction process of the post-cast slab band of the fabricated building laminated slab without a support system is characterized by comprising the following steps of:
a. erecting a template supporting system: flatly paving the templates of the whole top plate from two sides to the middle in the same sequence and the same direction;
b. measuring and paying off, and sticking a sponge strip: measuring and paying off the supported template, and accurately marking the position of the laminated slab; sticking a sponge strip along the line at the paying-off position;
c. hoisting and correcting the laminated slab: the laminated slab is horizontally hoisted, vertically and downwards installed from the top, and the elevation is checked;
d.T type split screw installation: a T-shaped counter-pulling screw is arranged at a hole in the middle of the post-cast slab band of the laminated slab, and the bottom of the template is clamped in a counter-pulling manner by combining double steel pipes and a mountain-shaped clamp;
e. laying water and electricity pipelines and binding laminated steel bars: laying water and electricity pipelines and binding steel bars of laminated slabs according to the requirements of drawings;
f. concrete pouring of the superposed layer: when the steel bars and the templates are qualified, cleaning the laminated slabs, sprinkling water and wetting, and then pouring concrete;
g. removing the template: and (4) removing the template support system after the floor concrete reaches the template removal strength specified by the specification.
2. The construction process of the assembly type building composite slab post-cast slab band unsupported system according to claim 1, characterized in that keel supports are arranged below butt joints in the step a.
3. The construction process of the assembly type building composite slab post-cast slab band unsupported system according to claim 2, characterized in that the keel support spacing is not more than 2m, the height difference between each support is not more than 2mm, and the elevation deviation is not more than 3 mm.
4. The construction process of the fabricated building composite slab post-cast strip unsupported system according to claim 1, wherein the composite slab in step c is kept horizontal by fine-tuning vertical supports.
5. The construction process of the fabricated building composite slab post-cast strip without support system as claimed in claim 1, wherein the short side of the composite slab in the step c is installed to penetrate 10mm into the beam/shear wall.
6. The construction process of the post-cast plate belt of the fabricated building laminated slab without the support system as claimed in any one of claims 4 to 5, wherein in the step c, before the laminated slab is installed, the accurate pre-buried position of the water and electricity pipeline is ensured.
7. The construction process of the fabricated building composite slab post-cast slab band unsupported system according to claim 1, wherein the T-shaped counter-pull screw in step d is welded with a 14mm screw by using a zero-material steel bar head with a diameter of not less than 16mm to form a "T-shaped counter-pull screw".
8. The construction process of the assembled building composite slab post-cast slab belt unsupported system according to claim 1, wherein the middle position in the step d is a position which is not more than 250mm from the beam edge and is not more than 850mm apart.
9. The construction process of the assembly type building composite slab post-cast plate belt without the support system as claimed in claim 1, wherein the construction process further comprises cutting off and rust-proof treatment of a T-shaped counter-pulling screw rod exposing the concrete surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010466388.XA CN111636677A (en) | 2020-05-28 | 2020-05-28 | Construction process of assembly type building laminated slab post-cast plate strip support-free system |
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| CN202010466388.XA CN111636677A (en) | 2020-05-28 | 2020-05-28 | Construction process of assembly type building laminated slab post-cast plate strip support-free system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089918A (en) * | 2021-04-16 | 2021-07-09 | 邓申付 | Construction method for mounting abutted seam filler of prefabricated composite floor slab |
| CN113931441A (en) * | 2021-09-30 | 2022-01-14 | 上海宝冶集团有限公司 | Method for supporting cavity superposed structure template |
| CN114059414A (en) * | 2021-12-27 | 2022-02-18 | 中国电建集团贵阳勘测设计研究院有限公司 | Overhead superposed type tunnel structure suitable for frozen soil area and construction method |
| CN114541632A (en) * | 2022-03-10 | 2022-05-27 | 安徽宝业建工集团有限公司 | Construction method for using laminated slab for prefabricated building roof layer floor slab |
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| CN113931441A (en) * | 2021-09-30 | 2022-01-14 | 上海宝冶集团有限公司 | Method for supporting cavity superposed structure template |
| CN114059414A (en) * | 2021-12-27 | 2022-02-18 | 中国电建集团贵阳勘测设计研究院有限公司 | Overhead superposed type tunnel structure suitable for frozen soil area and construction method |
| CN114541632A (en) * | 2022-03-10 | 2022-05-27 | 安徽宝业建工集团有限公司 | Construction method for using laminated slab for prefabricated building roof layer floor slab |
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Application publication date: 20200908 |
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