CN113175145A - Polystyrene square box core mold construction method for hollow floor system - Google Patents
Polystyrene square box core mold construction method for hollow floor system Download PDFInfo
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- CN113175145A CN113175145A CN202110485885.9A CN202110485885A CN113175145A CN 113175145 A CN113175145 A CN 113175145A CN 202110485885 A CN202110485885 A CN 202110485885A CN 113175145 A CN113175145 A CN 113175145A
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- concrete
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
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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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- 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
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to a polystyrene square box core mould construction method for a hollow floor system; the method is characterized in that: comprises preparing an anti-floating device; vibrating the bottom concrete to increase the anti-floating effect; after the support frame and the template are installed, an iron wire is penetrated into the template; binding reinforcing steel bars at the bottom of a core mold, arranging core mold cushion blocks, and placing four cushion blocks on each core mold; installing a polystyrene core mold; installing a permanent fixing device; installing an anti-floating device; pouring concrete; after concrete is poured to the top surface of the box, the foam box is in full contact with the concrete and generates full adsorption force, the iron wire is cut off, and the anti-floating positioning device is detached. The concrete forming quality of the bottom of the core mould is better; the core mould is provided with the through hole, the bottom concrete is vibrated through the through hole, the hydration heat dispersion of the concrete is facilitated, and the quality of the concrete at the bottom of the core mould can be effectively controlled. Meanwhile, compared with the prior art, the invention has flexible operation and convenient assembly and disassembly; the auxiliary anti-floating device can be detached and reused.
Description
Technical Field
The invention relates to the field of building construction, in particular to a polystyrene square box core mold construction method for a hollow floor system.
Background
The cast-in-situ hollow floor slab is one of hollow floor slab technologies, and light materials are regularly arranged to replace part of concrete of the solid floor slab to form a cavity or a light sandwich, so that the cavity and a hidden rib are formed to form a spatial honeycomb-shaped stressed structure. The technology reduces the dead weight of the floor, maintains most rigidity and strength of the floor, is a building structure system with reasonable performance and price, and better meets the modernized high-technology level.
Among the core moulds of hollow floor systems, the polystyrene core mould is widely applied to engineering because of the advantages of light weight, low cost, easy transportation, good heat preservation and insulation effect and the like. However, the polystyrene core mold is light, has large buoyancy in the concrete pouring process, and is easy to float upwards and shift, so reinforcement measures are needed in the construction process; meanwhile, concrete at the bottom of the core mold is difficult to vibrate, and the forming quality is poor.
The traditional polystyrene core mould fixing mode is as follows: two holes are drilled on two symmetrical sides of each core mold respectively by electric drills, an iron wire and a U-shaped steel pipe are combined to penetrate through the template, and the core mold is fixed on the template. However, in the actual construction process, when concrete is poured, the core mold has overlarge buoyancy, the iron wires are still broken, the core mold floats upwards, an upper concrete layer or a rib beam is too thin, improper control is achieved, the pouring quality of the concrete is seriously affected, and even quality accidents are caused.
Disclosure of Invention
The invention aims to overcome the defects and provides a construction method capable of effectively solving the problems of floating and displacement of a foam box of a hollow floor.
In order to achieve the above object, the present invention is realized by:
a polystyrene square box core mould construction method for a hollow floor comprises
Step 1, preparing an anti-floating device: determining the size of each component of the anti-floating device and processing the components according to the size of the polystyrene core mold and the distance between the upper reinforcing steel bars; the anti-floating device comprises: the device comprises an outer spiral nut (1), an inner spiral nut (2), a fixing piece (3), a gasket (4), a screw upright post (5), an iron wire or a steel wire (6), a template (7) and a square timber (8); the screw upright post (5) is arranged in the middle of the hollow floor foam box; the upper end of the screw upright post (5) is provided with a gasket (4) and an inner spiral nut (2) which are used for fixing the fixing piece (3) and the screw upright post (5); the lower end of the screw rod upright post (5) is provided with a 180-degree hook, and the screw rod upright post is connected with a square timber (8) at the bottom by an iron wire passing through a template (7);
step 2, drilling a through hole which is vertically penetrated and has the diameter of about 15cm in the center of the polystyrene core mold; the concrete at the bottom is vibrated through the hole, so that air remained below the foam box is effectively released, the buoyancy of the foam box is reduced, and the anti-floating effect is improved;
step 4, binding reinforcing steel bars at the bottom of the core mold, and arranging core mold cushion blocks, wherein at least four cushion blocks are uniformly arranged on each core mold;
step 7, after the binding of the upper reinforcing steel bars of the core mould is finished, installing an anti-floating device,
step 7.1, firstly installing a screw upright post (5), connecting a 180-degree hook with an iron wire, and fastening the bottom of a template (7) by using square timbers (8); secondly, a fixing piece (3) is installed and fixed on the screw upright post (5) by utilizing an inner spiral nut (2) and a gasket (4); finally, the external spiral nut (1) is rotated by using a spanner or a sleeve to be fastened;
step 8, pouring concrete; after concrete is poured to the top surface of the box, the foam box is in full contact with the concrete and generates full adsorption force, the iron wire is cut off, and the anti-floating positioning device is detached.
The invention mainly achieves the anti-floating effect through three steps:
1. structure optimization: a round hole which is through up and down is drilled in the middle of the die box along the vertical direction, and concrete at the bottom is vibrated through the round hole, so that air remained below the foam box can be effectively released, the buoyancy of the foam box is further reduced, the dissipation of concrete hydration heat is facilitated, the effect of effectively controlling the compactness of the concrete at the bottom can be achieved, and the anti-floating effect is increased;
2. permanently fixing the core mould by using a flat binding band;
3. the special auxiliary anti-floating device is temporarily fixed, after concrete is poured to the top surface of the box, the foam box and the concrete are fully contacted and generate sufficient adsorption force, the device is detached again, the special auxiliary anti-floating device can be repeatedly used, and the cost is not greatly increased.
Further, compared with the prior art, the concrete forming quality of the bottom of the core mould is better. The core mould is provided with the through hole, the bottom concrete can be vibrated through the through hole, the concrete hydration heat dissipation is facilitated, and the quality of the concrete at the bottom of the core mould can be effectively controlled. Meanwhile, compared with the prior art, the invention has flexible operation and convenient assembly and disassembly; the special auxiliary anti-floating device can be detached and reused.
Drawings
Fig. 1 is a schematic structural diagram of an anti-floating device according to the present invention.
Fig. 2 is a schematic structural diagram of an anti-floating device according to the present invention.
Fig. 3 is a first schematic view of an embodiment of the anti-floating device according to the present invention.
Fig. 4 is a schematic diagram of a second embodiment of the anti-floating device according to the present invention.
Fig. 5 is a third schematic view of an embodiment of the anti-floating device of the present invention.
Fig. 6 is a schematic diagram of a fourth embodiment of the anti-floating device according to the present invention.
Fig. 7 is a schematic diagram of a fifth embodiment of the anti-floating device according to the present invention.
Fig. 8 is a sixth schematic view of an anti-floating device according to the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 1 to 8, a polystyrene square box core mold construction method for a hollow floor comprises the following steps:
firstly, determining the sizes of all components of the special anti-floating device according to the actual size of a polystyrene core mould and the distance between upper reinforcing steel bars in a drawing, and processing a plurality of sets. The special auxiliary anti-floating device comprises: the device comprises an outer spiral nut 1, an inner spiral nut 2, a fixing piece 3, a gasket 4, a screw upright post 5, an iron wire or steel wire 6, a template 7 and a square timber 8; fig. 1 is a detailed view. The screw upright column is arranged in the middle of the hollow floor foam box; the upper end of the screw rod upright post is provided with a fixed gasket, threads and a nut which are used for fixing the fixed sheet and the upright post; the lower end of the screw rod upright post is provided with a 180-degree hook which penetrates through the template through an iron wire to be connected with the bottom battens.
And secondly, drilling a through hole which is vertically penetrated and has the diameter of about 15cm in the center of the polystyrene core mold. The bottom concrete is vibrated through the holes, air can be effectively reserved below the foam box, buoyancy of the foam box is further reduced, anti-floating effect is increased, concrete hydration heat dissipation is facilitated, and the effect of effectively controlling the compactness of the bottom concrete can be achieved.
And thirdly, after the support frame and the template are installed, popping up the central line of the polystyrene core mold according to a construction drawing, and penetrating an iron wire into the template.
Fourthly, binding reinforcing steel bars at the bottom of the core mold, arranging core mold cushion blocks, and uniformly placing four cushion blocks on each core mold at least.
And fifthly, installing the polystyrene core mold. The center of the through hole of the core mold needs to be aligned with the intersection point of the center lines of the bullets on the template, and the iron wires reserved in the third step are ensured to be in the hole.
And sixthly, mounting a permanent fixing device. The permanent fixture includes: a flat binding band 10 and a self-tapping screw 11; each core mold is evenly provided with two flat straps which are fixed on the template by self-tapping screws, as shown in detail in fig. 2.
And seventhly, after the binding of the reinforcing steel bars on the upper part of the core mold is finished, installing an auxiliary anti-floating device. Firstly, mounting a screw rod upright post, connecting a 180-degree hook with an iron wire, and fastening the bottom of a template by using small battens; secondly, mounting a fixing piece, and fixing the fixing piece on the screw upright post by using an internal spiral nut and a gasket; and finally, the external spiral nut is rotated by using a spanner or a sleeve to be fastened. As shown in fig. 5.
Eighthly, pouring concrete. After concrete is poured to the top surface of the box, the foam box is in full contact with the concrete and generates full adsorption force, the iron wire is cut off, and the anti-floating positioning device is detached. As shown in FIGS. 6 to 8.
Claims (1)
1. A polystyrene square box core mold construction method for a hollow floor is characterized by comprising the following steps: comprises that
Step 1, preparing an anti-floating device: determining the size of each component of the anti-floating device and processing the components according to the size of the polystyrene core mold and the distance between the upper reinforcing steel bars; the anti-floating device comprises: the device comprises an outer spiral nut (1), an inner spiral nut (2), a fixing piece (3), a gasket (4), a screw upright post (5), an iron wire or a steel wire (6), a template (7) and a square timber (8); the screw upright post (5) is arranged in the middle of the hollow floor foam box; the upper end of the screw upright post (5) is provided with a gasket (4) and an inner spiral nut (2) which are used for fixing the fixing piece (3) and the screw upright post (5); the lower end of the screw rod upright post (5) is provided with a 180-degree hook, and the screw rod upright post is connected with a square timber (8) at the bottom by an iron wire passing through a template (7);
step 2, drilling a through hole which is vertically penetrated and has the diameter of about 15cm in the center of the polystyrene core mold; the concrete at the bottom is vibrated through the hole, so that air remained below the foam box is effectively released, the buoyancy of the foam box is reduced, and the anti-floating effect is improved;
step 3, after the support frame and the template are installed, popping up a central line of the polystyrene core mold according to a construction drawing, and penetrating an iron wire into the template;
step 4, binding reinforcing steel bars at the bottom of the core mold, and arranging core mold cushion blocks, wherein at least four cushion blocks are uniformly arranged on each core mold;
step 5, installing a polystyrene core die, wherein the center of the through hole of the core die is aligned to the intersection point of the center lines of the bullets on the template, and the iron wire reserved in the step 3 is ensured to be in the hole;
step 6, installing a permanent fixing device, wherein the permanent fixing device comprises: the core mould comprises flat straps (10) and self-tapping screws (11), wherein each core mould is uniformly provided with two flat straps (10), and the flat straps (10) are fixed on a template by using the self-tapping screws (11);
step 7, after the binding of the upper reinforcing steel bars of the core mould is finished, installing an anti-floating device,
step 7.1, firstly installing a screw upright post (5), connecting a 180-degree hook with an iron wire, and fastening the bottom of a template (7) by using square timbers (8); secondly, a fixing piece (3) is installed and fixed on the screw upright post (5) by utilizing an inner spiral nut (2) and a gasket (4); finally, the external spiral nut (1) is rotated by using a spanner or a sleeve to be fastened;
step 8, pouring concrete; after concrete is poured to the top surface of the box, the foam box is in full contact with the concrete and generates full adsorption force, the iron wire is cut off, and the anti-floating positioning device is detached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110485885.9A CN113175145A (en) | 2021-04-30 | 2021-04-30 | Polystyrene square box core mold construction method for hollow floor system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110485885.9A CN113175145A (en) | 2021-04-30 | 2021-04-30 | Polystyrene square box core mold construction method for hollow floor system |
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| CN113175145A true CN113175145A (en) | 2021-07-27 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010006495A1 (en) * | 2008-07-17 | 2010-01-21 | Wang Junting | Cast-in-place hollow floor with load-relieving members and construction method thereof |
| CN203867023U (en) * | 2014-04-02 | 2014-10-08 | 重庆聚源塑料有限公司 | Anti-floating device for concrete core molds |
| CN105908885A (en) * | 2016-06-27 | 2016-08-31 | 青岛建集团有限公司 | Great-width multi-hole lightweight core formwork and construction method thereof |
| CN106013569A (en) * | 2016-06-12 | 2016-10-12 | 中国十七冶集团有限公司 | Method for preventing flotation of light solid composite core formwork of composite floor system |
| CN107237438A (en) * | 2017-08-21 | 2017-10-10 | 江苏智信达建筑科技有限公司 | Self-positioning anti-floating Prefabricated composite case mould and its application method for large span hollow floor |
| CN108867965A (en) * | 2018-07-05 | 2018-11-23 | 温州嘉成工程项目管理有限公司 | A kind of construction method of the float Structure of cast-in-place concrete hollow building roof |
| CN111485655A (en) * | 2020-03-16 | 2020-08-04 | 上海二十冶建设有限公司 | Novel internal mold hollow floor concrete pouring construction method |
| CN111962733A (en) * | 2019-09-06 | 2020-11-20 | 长沙巨星轻质建材股份有限公司 | Construction method of cast-in-situ concrete hollow floor |
| CN212453264U (en) * | 2020-04-22 | 2021-02-02 | 中国十七冶集团有限公司 | Anti reinforcing apparatus that floats of hollow superstructure mandrel of cast in situ concrete |
-
2021
- 2021-04-30 CN CN202110485885.9A patent/CN113175145A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010006495A1 (en) * | 2008-07-17 | 2010-01-21 | Wang Junting | Cast-in-place hollow floor with load-relieving members and construction method thereof |
| CN203867023U (en) * | 2014-04-02 | 2014-10-08 | 重庆聚源塑料有限公司 | Anti-floating device for concrete core molds |
| CN106013569A (en) * | 2016-06-12 | 2016-10-12 | 中国十七冶集团有限公司 | Method for preventing flotation of light solid composite core formwork of composite floor system |
| CN105908885A (en) * | 2016-06-27 | 2016-08-31 | 青岛建集团有限公司 | Great-width multi-hole lightweight core formwork and construction method thereof |
| CN107237438A (en) * | 2017-08-21 | 2017-10-10 | 江苏智信达建筑科技有限公司 | Self-positioning anti-floating Prefabricated composite case mould and its application method for large span hollow floor |
| CN108867965A (en) * | 2018-07-05 | 2018-11-23 | 温州嘉成工程项目管理有限公司 | A kind of construction method of the float Structure of cast-in-place concrete hollow building roof |
| CN111962733A (en) * | 2019-09-06 | 2020-11-20 | 长沙巨星轻质建材股份有限公司 | Construction method of cast-in-situ concrete hollow floor |
| CN111485655A (en) * | 2020-03-16 | 2020-08-04 | 上海二十冶建设有限公司 | Novel internal mold hollow floor concrete pouring construction method |
| CN212453264U (en) * | 2020-04-22 | 2021-02-02 | 中国十七冶集团有限公司 | Anti reinforcing apparatus that floats of hollow superstructure mandrel of cast in situ concrete |
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Application publication date: 20210727 |