CN116084615A - Concrete Hollow Roof with Fire Protection, Shock Absorption, Heat Insulation and Assembly Properties - Google Patents

Abstract

The invention discloses a concrete hollow roof with fire fighting, shock absorption, heat insulation and assembly performances, which comprises a top mould, a cast-in-place concrete floor, side moulds, net beam steel bars, corrugated water pipes, prefabricated bottom plate steel bars, prefabricated bottom plates, cast-in-place concrete floor steel bar nets and a bottom template; the top die, the side die and the prefabricated bottom plate form an assembly box; waterproof paint is sprayed in the cavity of the assembly box, and corrugated water pipes are arranged among the assembly boxes to control the balance of the liquid level in the cavity; the concrete hollow roof is provided with a water inlet and a water outlet, a rainwater collecting pipe and a valve, and is used for controlling the height of the liquid level in the cavity, and the water storage in the cavity of the assembly box is doped with heat-insulating flame-retardant antifreezing agent. The invention is suitable for reinforced concrete frames, shear walls and roofs of barrel structures with wide and large quantity, and can create huge economic and social benefits after popularization and application.

Description

Concrete Hollow Roof with Fire Protection, Shock Absorption, Heat Insulation and Assembly Properties

technical field

The invention belongs to the field of construction engineering and the field of environmental protection and energy saving engineering. According to the application and function of the concrete hollow roof of the present invention, it belongs to the field of construction engineering. The concrete hollow roof of the present invention has good performance of thermal insulation, heat insulation and sound insulation, which can reduce the floor height, use waste formwork materials to make the side panels and top panels of the assembly box to save investment, integrate fire protection and shock absorption, and use the bottom panel to prefabricate and assemble According to the nature, it can also belong to the field of environmental protection and energy saving engineering.

Background technique

Concrete hollow floor is an existing technology close to the present invention. The floor system has good heat insulation and sound insulation effects; reduces the amount of concrete and lowers the height of the floor and has high economic performance; Better than the beam floor system. In recent years, the floor system has been applied in industrial and civil buildings with large column nets, large bays, and large spaces. Especially the use of concrete hollow floors in the basement roof has greater economic and social benefits.

There are two main types of hollow floors:

(1) Cast-in-place concrete hollow floor, the design, construction and application are based on "Technical Regulations for Cast-in-place Concrete Hollow Floor Structure" CECS175-2004;

(2) Concrete hollow floors combined with assembly and cast-in-place, design, construction and application are based on "Technical Specifications for Concrete Hollow Floor Structures of Assembled Boxes" JGJ/T207-2010).

Assembling box concrete girder (hollow) floor technology is most similar to the present invention. The mesh beam (hollow) floor is a box-shaped concrete ribbed floor. The prefabricated "assembly box" and the post-cast concrete rib beam are combined to form a beam-slab integrated floor. It has a flat bottom, a large cavity honeycomb structure and space. Stress characteristics. The assembly box is assembled from three parts: a prefabricated reinforced concrete top plate, a bottom plate and a side wall tube made of hard materials. The top slab is directly used as the floor (roof) surface structure layer called the open box, and the top slab is used as a formwork and the reinforced concrete is bound on it as the floor (roof) surface structure layer is called the dark box. The mesh beam (rib beam) is a reinforced concrete beam formed by binding reinforced concrete between adjacent assembly boxes.

Disadvantages of existing technology:

1. Insufficiency or improvement of the existing assembly box:

(1) The side wall tube of the assembly box is made of hard materials in the factory. Due to the various sizes and specifications of the engineering structure, there are many specifications and models of the side wall in actual application and it will be confusing. The transportation from the factory to the construction site and the protection of the finished product are heavy workloads.

(2) The economic performance of the dark box roof in the assembly box is poor only as a formwork. Firstly, as a concrete component in the factory, production, transportation and product protection require costs. Second, because the concrete roof is 100kg/㎡ heavier than the wooden formwork, the structural load of the slab needs to be increased. capacity increases costs. There are construction joints between the top plate of the assembled box and the rib beam, which cannot play the role of the T-shaped rib beam and there is a hidden danger of leakage when used on the roof.

2. During construction, it is necessary to install floor support and set all formwork, which is duplication and waste. If only the formwork is set under the rib beam, the existence of the formwork will complicate the support system and be time-consuming and labor-intensive, with poor economic performance.

3. The pre-embedded pipelines of the assembled box concrete floor are set in the box:

(1) Temporary slotting is required during installation of the hard material side wall tube. The slotting process is complicated and requires anti-leakage slurry treatment.

(2) Pipeline inspection cannot be performed during use.

4. The existence of indoor fire pipelines seriously affects the appearance of large spaces without suspended ceilings.

5. The cavity in the assembly box is idle, and the function of the hollow floor system cannot be fully utilized.

Contents of the invention

Purpose of the invention: In view of the fact that the cast-in-place concrete hollow floor has many advantages and has been popularized and used, there are some shortcomings that limit the scope of application. The purpose of the invention is to provide a concrete hollow floor with fire protection, shock absorption, heat insulation and assembly performance. roof.

The technical scheme adopted in the present invention is: a concrete hollow roof with fire-fighting, shock-absorbing, heat-insulating and assembling properties, including top formwork, cast-in-place concrete floor, side formwork, mesh girder reinforcement, corrugated water pipes, and prefabricated floor Steel bars, prefabricated slabs, cast-in-place concrete floor reinforcement mesh and slab formwork;

The top form, the side form and the prefabricated bottom plate constitute an assembly box; the prefabricated bottom plate is a prefabricated concrete slab equipped with vertical and horizontal prefabricated bottom plate reinforcement bars, and the prefabricated bottom plate steel bars protrude out and are bound together with the mesh girder steel bars for pouring and joint stress The bottom formwork is placed on the bottom of the prefabricated bottom plate; the top formwork and side formwork are respectively made in the carpentry workshop using the waste formwork remaining on the construction site; There are cast-in-place concrete floor reinforcement mesh;

The interior of the cavity of the assembly box is sprayed with waterproof paint, and corrugated water pipes are installed between multiple assembly boxes to control the liquid level in the cavity. It acts as a stable support for the side formwork during construction, and serves as a flow channel for water between the cavities during the use of the house;

The concrete hollow roof is provided with a water inlet and outlet, a rainwater collecting pipe and a valve, which are used to control the liquid level in the cavity. The water stored in the cavity of the assembly box is mixed with heat-insulating, flame-retardant and antifreeze agent, which has the following advantages: 1) Antifreeze in winter, 2) The fire extinguishing effect of water mixed with heat-insulating and flame-retardant antifreeze is higher than that of pure water, 3) Water mixed with heat-insulating, flame-retardant and antifreeze has a certain viscosity and has a certain viscous effect on the flow of water. Its shock absorption effect is better than pure water.

As a preference, two small pieces of wood are placed in the middle of the bottom formwork, and a small piece of wood is placed on the upper parts of both sides of the bottom formwork. Bending is carried out during overall pouring.

As a preference, the middle part of the cast-in-place concrete floor should be provided with a long waterproof coiled material slightly wider than the length of the corrugated water pipe, and roof box ribs should be provided on both sides of the corrugated water pipe to play a fixed role.

As a preference, the top form is provided with plastic positioning pads for installing the cast-in-place concrete floor reinforcing mesh.

Preferably, the waterproof coating uses ZS-711 inorganic anti-corrosion coating with strong salt water resistance and good drying performance, and is sprayed on the inner wall of the concrete cavity and the top of the grid beam.

Beneficial effect: the present invention has the following properties:

(1) Excellent thermal insulation and sound insulation performance.

(2) Excellent performance. The beamless roof achieves the purpose of reducing the floor height and flat bottom without the need for a suspended ceiling. It has beautiful appearance, good lighting and air-conditioning effects.

(3) Excellent economic performance and environmental protection performance. There is no insulation layer on the roof, less waterproof layer, no fire water tank, the box side formwork and top formwork are made in the carpentry workshop with waste templates, rainwater is used, the roof has no beams, and the number of fire pipes is reduced to reduce the storey height. After popularization and application, a large amount of investment and environmental protection and energy saving can be saved.

4) Excellent fire protection function and shock absorption function

Water is stored in the cavity of the assembly box (mixed with flame retardant antifreeze), and facilities such as bellows and water inlet and outlet are set to ensure the fluidity of water and realize the purpose of integrating fire protection and shock absorption functions.

The invention is suitable for wide-area and large-scale reinforced concrete frames, shear walls and roofs of cylindrical structures, and can create huge economic and social benefits after popularization and application.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the concrete hollow roof of the present invention.

Fig. 2 is a schematic diagram of the assembly box of the concrete hollow roof of the present invention.

Fig. 3 is a schematic diagram of the connection of the assembly box of the present invention.

Fig. 4 is a schematic diagram of the prefabricated floor of the present invention.

Detailed ways

The technical solutions in the entire embodiment will be described in detail below in conjunction with the drawings and specific implementation methods of the present invention.

As shown in his 1-4, a concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance, including top form 1, cast-in-place concrete floor 2, side form 3, mesh girder reinforcement 4, corrugated Water pipe 5, prefabricated bottom slab reinforcement 7, prefabricated bottom slab 8, cast-in-place concrete floor reinforcement mesh 9 and bottom formwork 11;

The top form 1, the side form 3 and the prefabricated bottom plate 8 constitute an assembly box; the prefabricated bottom plate 8 is a prefabricated concrete slab configured with vertical and horizontal prefabricated bottom plate steel bars 7, and the prefabricated bottom plate steel bars 7 are stretched out and bound with the mesh girder steel bars 4 pouring together and bearing the force together; the bottom of the prefabricated bottom plate 8 is placed with the bottom template 11; the top mold 1 and the side mold 3 are made respectively in the carpentry room using the waste templates remaining on the construction site; the top mold 1 is the current The poured concrete floor 2 is provided with a cast-in-place concrete floor reinforcement mesh 9 inside the cast-in-place concrete floor 2;

The interior of the cavity of the assembly box is sprayed with waterproof paint, and corrugated water pipes are installed between multiple assembly boxes to control the liquid level in the cavity. The mold 3 acts as a stable support for the side mold 3 during installation and construction, and serves as a flow channel for water between the cavities during the use of the house;

The concrete hollow roof is provided with a water inlet and outlet, a rainwater collecting pipe and a valve, which are used to control the liquid level in the cavity. The water stored in the cavity of the assembly box is mixed with heat-insulating, flame-retardant and antifreeze agent, which has the following advantages: 1) Antifreeze in winter, 2) The fire extinguishing effect of water mixed with heat-insulating and flame-retardant antifreeze is higher than that of pure water, 3) Water mixed with heat-insulating, flame-retardant and antifreeze has a certain viscosity and has a certain viscous effect on the flow of water. Its shock absorption effect is better than pure water.

Two small pieces of wood 10 are placed in the middle part of the bottom template 11, and a small piece of wood 10 is respectively placed on the upper parts of the two sides of the bottom formwork 11. Bending is carried out during overall pouring. The middle part of the cast-in-place concrete floor 2 shall be provided with a long waterproof coiled material slightly wider than the length of the corrugated water pipe 5, and roof box ribs 6 shall be provided on both sides of the corrugated water pipe 5 to play a fixing role. The top mold 1 is provided with plastic positioning pads for installing the cast-in-place concrete floor reinforcement mesh 9 for use. The waterproof coating uses ZS-711 inorganic anti-corrosion coating with strong salt water resistance and good drying performance, and is sprayed on the inner wall of the concrete cavity and the top of the grid beam.

The embodiment is the application in the roof of the 300-square-meter auditorium in the middle unit of the sixth floor (top floor) of the main building of a tourism, health care and vacation center (total construction area of 8300 square meters). The floor height of the auditorium is 3.4m, and the girder height of the roof is 0.7m, so the floor height is only 2.7m, which cannot meet the requirement of 3.0m. After adopting a concrete hollow roof (roof thickness 0.35m) of the present invention with the performance of fire protection, shock absorption, heat insulation and assembly, the net floor height is 3.05m, which meets the net height requirements of the auditorium and the slab bottom is flat and does not require Decorate the ceiling.

The box body of the embodiment (comprising prefabricated concrete base plate, box body side plate and top formwork made with waste formwork, water bellows, water inlet and outlet and rainwater collector).

The production method of the embodiment of the concrete hollow roof with "four excellent" properties:

1. Cabinet making

The concrete floor is prefabricated on the ground of the first floor of this project, and the concrete floor is made upside down to ensure that the bottom surface of the slab is flat and smooth to meet the requirement of no suspended ceiling. Use waste templates to make box side panels and top templates in the carpentry room on the construction site.

2. Roof box installation and reinforced concrete construction steps

(1) Set up the roof construction support first.

(2) Assemble the prefabricated concrete bottom slab (sealing joints are sealed with sealant), bend the steel bars at the end of the precast slab and extend into the rib beam, and bind the rib beam steel bars.

(3) On site, nail the side panels into side wall tubes and install them on the precast concrete floor, and drill holes in the middle of the side panels and install water-through bellows (roof box ribs are set on both sides of the bellows for Fix the position of the bellows,), spray waterproof paint on the bottom and side panels of the box, and seal the joints between the bellows and the side panels with sealant.

(4) Bend the steel bars on both sides of the prefabricated bottom plate and extend them into the rib beams, bind the rib beam steel bars, and install wire pipes, water inlets and outlets, and rainwater collectors.

(5) Pouring rib beams and roof concrete, removing the roof construction support after curing, and using the water inlet to inject water.

The bottom plate of the box body of the present invention adopts the prefabricated concrete bottom plate on site; the side panels and top plates of the box body are made in the carpentry room by using the waste templates remaining on site, which can ensure the production quality of the box body and save the material cost and transportation cost of the box body , Finished product protection fee and waste formwork processing fee, excellent economic performance and environmental protection performance. Reinforcing the reinforcement on the top plate and pouring concrete together with the rib beam to form a T-shaped rib beam to improve the bearing capacity of the rib beam.

In the present invention, the prefabricated concrete bottom slab is top-tightly spliced and used as the post-cast concrete rib beam bottom form, the original system slab bottom construction formwork is canceled, and the material cost and labor cost for installation and removal are saved.

The pipeline of the present invention is pre-embedded in the roof concrete and protrudes from the base plate at the joint of the rib-beam bottom formwork, which overcomes the complex construction process of the original system and the inspection problems during the use of the pipeline.

Sufficient fire-fighting water is stored in the box of the present invention, which can be directly used for spraying and fire-fighting, reduces a large amount of fire-fighting pipeline material costs and installation labor costs, and realizes the aesthetic effect of a smooth top surface in a large space.

The present invention fully utilizes the box body of the hollow floor as the water storage device, utilizes the connecting bellows as the flow channel and arranges the rainwater collector, and realizes the multifunctional application of rainwater collection, fire-fighting water storage and shock absorption damper. It is a new roof system that saves materials, water, heat insulation, energy saving and environmental protection.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (5)

1. Concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance, characterized in that it includes top form, cast-in-place concrete floor, side formwork, mesh girder reinforcement, corrugated water pipes, prefabricated bottom slab reinforcement, prefabricated bottom slab , Cast-in-place concrete floor reinforcement mesh and bottom formwork; The top form, the side form and the prefabricated bottom plate constitute an assembly box; the prefabricated bottom plate is a prefabricated concrete slab equipped with vertical and horizontal prefabricated bottom plate reinforcement bars, and the prefabricated bottom plate steel bars protrude out and are bound together with the mesh girder steel bars for pouring and joint stress The bottom formwork is placed on the bottom of the prefabricated bottom plate; the top formwork and side formwork are respectively made in the carpentry workshop using the waste formwork remaining on the construction site; There are cast-in-place concrete floor reinforcement mesh; The interior of the cavity of the assembly box is sprayed with waterproof paint, and corrugated water pipes are installed between multiple assembly boxes to control the liquid level in the cavity. The solid support of the side formwork during construction, and the flow channel of water between the cavities during the use of the house; The concrete hollow roof is provided with a water inlet and outlet, a rainwater collecting pipe and a valve for controlling the liquid level in the cavity, and the water stored in the cavity of the assembly box is mixed with a heat-insulating, flame-retardant and antifreeze agent. 2. The concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance according to claim 1, characterized in that: two small wooden blocks are placed in the middle of the bottom formwork, and the upper parts on both sides of the bottom formwork are respectively placed A small piece of wood, and when setting the prefabricated bottom slab reinforcement, a small piece of steel bar should be reserved at the place where the wood block is placed, for bending during overall pouring. 3. The concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance according to claim 1, characterized in that: the middle part of the cast-in-place concrete floor should be provided with a pipe slightly wider than the length of the corrugated water pipe. The whole length of the waterproof membrane, the roof box ribs are set on both sides of the corrugated water pipe to play a fixed role. 4. The concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance according to claim 1, characterized in that: said top mold is provided with plastic positioning pads for installation of cast-in-place concrete floor reinforcement mesh . 5. The concrete hollow roof with fire protection, shock absorption, heat insulation and assembly performance according to claim 1, characterized in that: ZS-711 inorganic anticorrosion coating with strong salt water resistance is used for the waterproof coating.

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