CN210798011U

CN210798011U - Fireproof floor

Info

Publication number: CN210798011U
Application number: CN201921001848.0U
Authority: CN
Inventors: 尚志海; 崔明芝; 王茹
Original assignee: Beijing Jingcheng Huayu Architecture Design And Research Institute Co ltd; MCC Capital Engineering and Research Incorporation Ltd
Current assignee: Beijing Jingcheng Huayu Architecture Design And Research Institute Co ltd; MCC Capital Engineering and Research Incorporation Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-06-19
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a fireproof floor slab, which comprises two first frames, two second frames and a filling plate, wherein the two first frames and the two second frames are connected to form a rectangular frame, the filling plate is fixedly filled inside the rectangular frame, the filling plate comprises a first reinforcing mesh, a first concrete pouring part positioned in the middle of the first reinforcing mesh and a second concrete pouring part positioned at the edge of the first reinforcing mesh, the outer edge of the first concrete pouring part is connected with the inner edge of the second concrete pouring part, the first reinforcing mesh is arranged inside the rectangular frame along the plane of the rectangular frame, the first concrete is poured in the first concrete pouring part, the second concrete is poured in the second concrete pouring part, the first reinforcing mesh is poured and coated in the first concrete and the second concrete, and the edge of the first reinforcing mesh is connected with the rectangular frame through the second concrete. The utility model provides an assembled steel skeleton texture weight big, the poor technical problem of fire-protecting ability.

Description

Fireproof floor

Technical Field

The utility model relates to a light-duty steel skeleton panel, especially mainly used cooperate steel construction industry and civil buildings's roof boarding, wallboard and floor board, concretely relates to fire prevention floor.

Background

The assembly type structure is formed by assembling and connecting prefabricated components serving as main stressed components, is one of important directions for the development of building structures in China, is beneficial to the development of building industrialization in China, improves the production efficiency, saves energy, develops green and environment-friendly buildings, and is beneficial to improving and ensuring the quality of building engineering. Compared with the existing construction method, the assembly type structure is beneficial to green construction, can better meet the requirements of land saving, energy saving, material saving, water saving, environmental protection and the like of the green construction, reduces the negative influence on the environment, and is beneficial to environmental protection and sustainable development.

The prefabricated steel skeleton light floor slab is developed on the basis of a prefabricated concrete floor slab, and not only is the self weight of the structure reduced, but also the earthquake action of a building is reduced. However, the steel skeleton needs to be subjected to fire-proof treatment, and the steel skeleton is usually coated with fire-proof paint or wrapped by a fire-proof plate according to the fire-proof grade of a building after being installed. Therefore, it is an urgent problem to find a steel skeleton structure having fire-proof capability without using fire-proof paint.

Therefore, the utility model discloses the people relies on experience and practice of engaging in relevant trade for many years, provides a fire prevention floor to overcome prior art's defect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire prevention floor can play good fire prevention effect under the condition of not brushing fire-proof material, and it has good fire-resistant limit and stability, has improved the security and the life of floor.

The purpose of the utility model can be realized by adopting the following technical scheme:

the utility model provides a fire prevention floor, be parallel arrangement's first frame and two second frames that are parallel arrangement including two first frames and two the second frame is connected and is formed rectangular frame, fire prevention floor still includes: and the filling plate is fixedly filled inside the rectangular frame and comprises a first reinforcing mesh, a first concrete pouring part and a second concrete pouring part, the first concrete pouring part is positioned in the middle of the first reinforcing mesh, the second concrete pouring part is positioned at the edge of the first reinforcing mesh, the outer edge of the first concrete pouring part is connected with the inner edge of the second concrete pouring part, the first reinforcing mesh is arranged inside the rectangular frame along the plane of the rectangular frame, first concrete is poured in the first concrete pouring part, second concrete is poured in the second concrete pouring part, the first reinforcing mesh is poured and coated in the first concrete and the second concrete, and the edge of the first reinforcing mesh is connected with the rectangular frame through the second concrete.

In a preferred embodiment of the present invention, the first concrete is lightweight concrete; the second concrete is ordinary concrete.

In a preferred embodiment of the present invention, the second concrete pouring portion is located at two opposite edges of the first reinforcing mesh, the two opposite edges of the first reinforcing mesh are connected to the corresponding first frame through the common concrete, and the other two opposite edges of the first reinforcing mesh are connected to the corresponding second frame through the lightweight concrete.

The utility model discloses a in a preferred embodiment, first frame with the second frame is "C" shaped steel, first frame with the notch of second frame all moves towards rectangular frame's inboard, the edge of first reinforcing bar net stretches into correspondingly in the notch, and pass through ordinary concrete placement is fixed.

The utility model discloses a in a preferred embodiment, the inside of first frame is provided with the second reinforcing bar net, the second reinforcing bar net with welded fastening between the first reinforcing bar net, the second reinforcing bar net pass through ordinary concrete with first frame pouring is fixed.

The utility model discloses an in the preferred embodiment, first reinforcing bar, second reinforcing bar and many third reinforcing bars that second reinforcing bar net includes, first reinforcing bar with the second reinforcing bar all sets up along the horizontal direction, many the third reinforcing bar sets up along vertical direction, first reinforcing bar is located directly over the second reinforcing bar, first reinforcing bar with through many between the second reinforcing bar third reinforcing bar fixed connection.

The present invention is preferably configured such that the third reinforcing bars are arranged at intervals in the horizontal direction, and the third reinforcing bars are connected to the first reinforcing bars and the second reinforcing bars by welding.

In a preferred embodiment of the present invention, the height of the first frame is greater than the thickness of the filling board, and the height of the second frame is greater than or equal to the thickness of the filling board.

In a preferred embodiment of the present invention, the connection surface between the first concrete pouring portion and the second concrete pouring portion is a slope inclined from bottom to top toward the inside of the rectangular frame.

In a preferred embodiment of the present invention, the middle portion of the rectangular frame is provided with a connecting member, and two ends of the connecting member correspond to the first frame.

In a preferred embodiment of the present invention, the connecting member is an angle steel, and the connecting member and the first frame are connected by welding.

From above, the utility model discloses a fire prevention floor's characteristics and advantage are: the filling plate is fixedly arranged on the inner side of the rectangular frame and comprises a first reinforcing mesh, a first concrete pouring part positioned in the middle of the first reinforcing mesh and a second concrete pouring part positioned at the edge of the first reinforcing mesh, light concrete is poured in the first concrete pouring part, common concrete is poured in the second concrete pouring part, the edge of the first reinforcing mesh is connected with the rectangular frame through the common concrete, and through the connection of the common concrete and the rectangular frame, the first reinforcing mesh and the first reinforcing mesh form a double stress body, so that the rigidity and the stability of the floor slab are improved, the deformation of the floor slab in the stress process is reduced, the service life of the floor slab is prolonged, in addition, the first reinforcing mesh is poured in the light concrete and the common concrete, the weight of the floor slab is greatly reduced through the light concrete, the floor slab is ensured to have good fire resistance and fire resistance, and construction is convenient, the construction efficiency is improved.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: do the utility model discloses the plan view of light PLASTIC LAMINATED.

FIG. 2: is the front view of the light fire-proof plate of the utility model.

FIG. 3: is the longitudinal section view of the light fire-proof plate of the utility model.

FIG. 4: is the structure schematic diagram of the second reinforcing mesh in the light fireproof plate.

FIG. 5: do the utility model discloses the top view of infill panel in the light PLASTIC LAMINATED.

The utility model provides a reference numeral: 1. a first frame; 2. a second frame; 3. a connecting member; 4. a infill panel; 401. a first reinforcing mesh; 402. a second reinforcing mesh; 4021. a first reinforcing bar; 4022. a second reinforcing bar; 4023. A third reinforcing bar; 403. a first concrete pouring section; 404. a second concrete pouring section; 5. a rectangular frame.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Unless the directions are defined separately, the upper and lower directions mentioned in the present disclosure are the same as the upper and lower directions in fig. 2, and are described herein together.

As shown in fig. 1 to 5, the utility model provides a fire-proof floor slab, this fire-proof floor slab includes two first frames 1, two second frames 2 and infill panel 4, two first frames 1 parallel arrangement, two second frames 2 parallel arrangement, two first frames 1 and two second frames 2 connect and form rectangular frame 5. The filling plate 4 is fixedly filled inside the rectangular frame 5, wherein the filling plate 4 comprises a first reinforcing mesh 401, a first concrete pouring part 403 positioned in the middle of the first reinforcing mesh 401 and a second concrete pouring part 404 positioned at the edge of the first reinforcing mesh 401, the outer edge of the first concrete pouring part 403 is connected with the inner edge of the second concrete pouring part 404, the first reinforcing mesh 401 is arranged inside the rectangular frame 5 along the plane of the rectangular frame 5, first concrete is poured in the first concrete pouring part 403, second concrete is poured in the second concrete pouring part 404, the first reinforcing mesh 401 is poured and wrapped in the first concrete and the second concrete, and the edge of the first reinforcing mesh 401 is fixed with the rectangular frame 5 through the second concrete. The utility model discloses a second concrete in second concrete placement portion 404 is fixed with rectangular frame 5's pouring, it forms dual atress body with first reinforcing bar net 401, the rigidity and the stability of floor have been improved, reduce the deformation volume of floor in the atress process, the life of floor is improved, in addition, first reinforcing bar net 401 is poured in first concrete and second concrete, first concrete greatly reduced the weight of floor, not only guarantee that the floor has good fire-resistant and fire-proof capability, and convenient construction, construction efficiency is improved.

Specifically, the first concrete is lightweight concrete; the second concrete is ordinary concrete, and the weight of the fireproof floor slab is greatly reduced through the matching of the light concrete and the ordinary concrete.

Further, the height of the first frame 1 is greater than the thickness of the filling plate 4, the height of the second frame 2 is greater than or equal to the thickness of the filling plate 4, and the top surfaces of the first frame 1 and the second frame 2 are flush with the top surface of the filling plate 4. Can play the guard action to infill panel 4 through first frame 1 and second frame 2, in addition, be convenient for first frame 1 and second frame 2 and other outside steel construction spare weld.

Specifically, as shown in fig. 5, the second concrete pouring sections 404 are located at two opposite edges of the first reinforcing mat 401, the two opposite edges of the first reinforcing mat 401 are connected to the corresponding first frame 1 by normal concrete, and the other two opposite edges of the first reinforcing mat 401 are connected to the corresponding second frame 2 by lightweight concrete.

Further, as shown in fig. 3, the first frame 1 and the second frame 2 are both made of "C" shaped steel, the notches of the first frame 1 and the second frame 2 face the inner side of the rectangular frame 5, two opposite edges of the first reinforcing mesh 401 correspondingly extend into the notches of the two first frames 1 and are fixed by pouring of ordinary concrete, and the other two opposite edges of the first reinforcing mesh 401 correspondingly extend into the notches of the two second frames 2 and are fixed by pouring of lightweight concrete. Ensures good stability of the connection between the first mesh reinforcement 401 and the first frame 1 and the second frame 2.

As shown in fig. 3, a second mesh reinforcement 402 is disposed inside the first frame 1, the second mesh reinforcement 402 is welded to the first mesh reinforcement 401, and the second mesh reinforcement 402 is fixed to the first frame 1 by casting with ordinary concrete. The supporting beam is formed by pouring and fixing the second mesh reinforcement 402 and the normal concrete, so that the stability of the first mesh reinforcement 401 poured in the normal concrete is improved, and the stability of the connection between the first mesh reinforcement 401 and the first frame 1 is further improved. Due to the existence of the supporting beams, the stress condition of the whole rectangular frame 5 does not need to be considered under the condition of fire, and only the stress condition of the supporting beams can be considered. The stress condition of the supporting beam can be considered and selected in two ways, wherein the first way only considers the condition of preventing the floor from collapsing during the fire and does not consider the action of live load during the normal use; the second mode considers the recovery of normal use condition after fire detection, and needs to consider the action of live load during use.

Specifically, as shown in fig. 4, the first reinforcing steel bar 4021, the second reinforcing steel bar 4022 and the plurality of third reinforcing steel bars 4023 that the second reinforcing steel bar mesh 402 includes are all set up along the horizontal direction, and the plurality of third reinforcing steel bars 4023 are set up along the vertical direction, and a plurality of the third reinforcing steel bars 4023 are arranged along the horizontal direction at intervals, and the first reinforcing steel bar 4021 is located directly over the second reinforcing steel bar 4022, and the first reinforcing steel bar 4021 is fixedly connected with the second reinforcing steel bar 4022 through the plurality of third reinforcing steel bars 4023.

Further, the third reinforcing bar 4023 is connected to the first reinforcing bar 4021 and the second reinforcing bar 4022 by welding.

As shown in fig. 3, the connecting surface between the first concrete pouring section 403 and the second concrete pouring section 404 is formed in a slope shape inclined from the bottom to the top toward the inside of the rectangular frame 5. Due to the arrangement of the slope-like structure, when pouring lightweight concrete into the first concrete pouring section 403, the lightweight concrete is prevented from flowing into the interior of the first frame through the notch of the first frame 1.

Specifically, the slope may be, but is not limited to, 45 °.

As shown in fig. 1, a connecting member 3 is provided in the middle of a rectangular frame 5, one end of the connecting member 3 is connected to the middle of one first frame 1, the other end of the connecting member 3 is connected to the middle of the other first frame 1, and the filling plate 4 is divided equally into two parts of equal area by the connecting member 3. The connecting stability between the two first frames 1 and the filling plate 4 is improved through the connecting pieces 3.

Specifically, the connecting piece 3 is an angle steel arranged along the horizontal direction, and the connecting way between the connecting piece 3 and the first frame 1 is welding.

Specifically, the utility model provides a light concrete is named foam concrete again, is that the foaming system through the foaming machine fully foams with mechanical system for the foamer to with foam and grout homogeneous mixing, then carry out cast-in-place construction or mould shaping through the pumping system of foaming machine, through the formation of natural maintenanceThe novel light heat-insulating material contains a large number of closed air holes. The light concrete is a porous material prepared by preparing foam from a foaming agent aqueous solution, adding the foam into slurry consisting of siliceous materials, calcareous materials, water and various additives, mixing, stirring, casting, molding and maintaining. The density of the lightweight concrete is 300 to 1800kg/m³Because the density of the light concrete is small, the material is usually adopted in building structures such as internal and external walls, floors, columns and the like of buildings, the self weight of the buildings can be reduced by about 25 percent, and the self weight of the buildings can reach 30 to 40 percent of the total weight of the structures.

Specifically, the utility model provides a common concrete uses cement as main cementitious material, with water, sand and stone intensive mixing, can mix into chemical admixture and mineral admixture, through the artificial stone material of evenly stirring, closely knit shaping and maintenance sclerosis formation.

Wherein, the ordinary concrete can be prepared by mixing portland cement, ordinary portland cement, portland slag cement, pozzolanic portland cement and portland fly ash cement, and if necessary, rapid-hardening portland cement.

In the actual construction process of the fireproof floor slab, the thickness of the filling plate 4 and the distance and the diameter of the steel bars on the first steel bar mesh 401 can be obtained according to parameters such as floor load, required length and width of the floor slab, strength of light concrete and the like. According to the size of the load transferred to the first frame 1, the number of the common concrete, the selected steel material of the first frame 1 and the strength of the selected steel bar, the size of the first frame 1 and the second frame 2 and the distance and the diameter of the steel bar on the second steel bar mesh 402 can be obtained, the width and the height of the selected first frame 1 and the second frame 2 are required to ensure that the first steel bar mesh 401 arranged on the inner side is protected by the concrete, and the thickness of the concrete can reach the required fire-resistant limit.

Under the normal use condition, only the stress condition of the first frame 1 and the common concrete poured together is considered, and the section sizes of the first frame 1 and the second frame 2 are obtained according to the selected common concrete mark number, the floor length and the materials of the first frame 1 and the second frame 2. In case of fire, stress of the first and

second frames

1 and 2 is not taken into consideration, and only stress of the second mesh reinforcement 402 with the reinforced concrete support beam formed of general concrete is taken into consideration, wherein the first method only takes into consideration the prevention of collapse of the floor during fire, and calculates the support beam bearing force and deformation without taking into consideration the effect of live load during normal use. The second method considers the situation that the normal use condition is recovered after fire disaster detection, and needs to calculate the bearing capacity and deformation of the supporting beam by considering the action of live load during use.

The fireproof floor slab can be manufactured in a prefabrication factory. Firstly, the second reinforcing mesh 402 is placed inside the first frame 1, the surface of the first frame 1 is galvanized in advance to ensure that the thickness of the common concrete and the thickness of the light concrete meet the requirement of fire resistance limit, and then the first reinforcing mesh 401 and the connecting piece 3 are arranged to weld the first frame 1, the second frame 2 and the connecting piece 3. And then, placing the welded steel framework of the floor slab on a pre-opened bottom die, as shown in fig. 5, firstly pouring lightweight concrete into the middle of the filling plate 4, wherein a gap larger than 40mm is reserved between the outer edge of the lightweight concrete and the first frame 1 during pouring, and the outer edge of the lightweight concrete is of a slope-shaped structure inclined towards the inner side of the rectangular frame 5 so as to prevent the lightweight concrete from flowing into the first frame 1. As shown in fig. 3 and 5, ordinary concrete is poured into the first frame 1 and between the first frame 1 and the lightweight concrete, and the concrete is compacted by vibration with a vibrating rod having a small diameter. Finally, carry out normal maintenance 28 days after to lightweight concrete and ordinary concrete, can transport the job site and install, wherein, the utility model discloses a through welded fastening between the major structure of fire prevention floor and building.

The utility model discloses fire prevention floor's characteristics and advantage are:

firstly, the fireproof floor slab is fixedly provided with a filling plate 4 on the inner side of a rectangular frame 5, the filling plate 4 further comprises a first reinforcing mesh 401, a first concrete pouring part 403 positioned in the middle of the first reinforcing mesh 401 and a second concrete pouring part 404 positioned at the edge of the first reinforcing mesh 401, light concrete is poured in the first concrete pouring part 403, common concrete is poured in the second concrete pouring part 404, the edge of the first reinforcing mesh 401 is connected with the rectangular frame 5 through the common concrete, and a double stress body is formed by the common concrete and the rectangular frame 5 through the connection of the common concrete and the first reinforcing mesh 401, so that the rigidity and the stability of the floor slab are improved, the deformation amount of the floor slab in the stress process is reduced, and the service life of the floor slab is prolonged.

Second, in this fire prevention floor first reinforcing bar net 401 pour into a mould in lightweight concrete and ordinary concrete, lightweight concrete greatly reduced the weight of floor, need not use fire prevention coating or PLASTIC LAMINATED parcel in addition, can guarantee through lightweight concrete and ordinary concrete that the floor has good fire-resistant and fire-proof capability, make the floor reach required fire endurance, easy to assemble moreover improves the efficiency of construction.

The utility model overcomes to the light-duty floor of traditional assembled prefabricated steel skeleton carry out fire prevention and handle not only the danger that has high altitude construction, shortcoming such as pleasing to the eye that fire resistive material influences the steel skeleton moreover accords with china's needs that promote the assembly type structure vigorously, accords with green construction requirement, has great realistic meaning and engineering using value.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a fire prevention floor, includes two first frames (1) that are parallel arrangement and two second frames (2) that are parallel arrangement, two first frame (1) and two second frame (2) are connected and are formed rectangular frame (5), its characterized in that, fire prevention floor still includes: a filling plate (4) fixedly filled inside the rectangular frame (5), the filling plate (4) comprising a first reinforcing mat (401), a first concrete casting section (403) located in the middle of the first reinforcing mat (401), and a second concrete casting section (404) located at the edge of the first reinforcing mat (401), the outer edge of the first concrete casting section (403) being contiguous with the inner edge of the second concrete casting section (404), the first reinforcing mat (401) being disposed inside the rectangular frame (5) along the plane of the rectangular frame (5), a first concrete being cast in the first concrete casting section (403), a second concrete being cast in the second concrete casting section (404), the first reinforcing mat (401) being cast in the first concrete and the second concrete with the edge of the first reinforcing mat (401) being connected to the rectangular frame (5) through the second concrete And (6) connecting.

2. A fire-resistant floor slab as claimed in claim 1, wherein the first concrete is lightweight concrete; the second concrete is ordinary concrete.

3. Fire-resistant floor slab according to claim 2, characterised in that said second concrete-poured portion (404) is located at two opposite edges of said first reinforcing mat (401), said two opposite edges of said first reinforcing mat (401) being connected to the corresponding said first frame (1) by said ordinary concrete, and the other two opposite edges of said first reinforcing mat (401) being connected to the corresponding said second frame (2) by said lightweight concrete.

4. A fire-resistant floor slab as claimed in claim 2, wherein the first frame (1) and the second frame (2) are both formed by C-shaped steel, the notches of the first frame (1) and the second frame (2) are both towards the inner side of the rectangular frame (5), and the edges of the first reinforcing mesh (401) are inserted into the corresponding notches and fixed by the common concrete pouring.

5. A fire-resistant floor slab according to claim 4, characterised in that a second mesh reinforcement (402) is arranged inside the first frame (1), the second mesh reinforcement (402) is welded and fixed with the first mesh reinforcement (401), and the second mesh reinforcement (402) is fixed with the first frame (1) by pouring the common concrete.

6. A fire-retardant floor slab according to claim 5, characterized in that the second mesh reinforcement (402) comprises a first reinforcement (4021), a second reinforcement (4022) and a plurality of third reinforcements (4023), the first reinforcement (4021) and the second reinforcement (4022) are arranged in a horizontal direction, the plurality of third reinforcements (4023) are arranged in a vertical direction, the first reinforcement (4021) is located right above the second reinforcement (4022), and the first reinforcement (4021) and the second reinforcement (4022) are fixedly connected by the plurality of third reinforcements (4023).

7. A fire-resistant floor slab according to claim 6, characterised in that a plurality of said third reinforcing bars (4023) are horizontally spaced apart from each other, and the third reinforcing bars (4023) are connected to said first reinforcing bars (4021) and said second reinforcing bars (4022) by welding.

8. A fire-resistant floor slab according to claim 4, characterised in that the height of the first rim (1) is greater than the thickness of the infill panel (4) and the height of the second rim (2) is greater than or equal to the thickness of the infill panel (4).

9. A fire-resistant floor slab as claimed in claim 2, characterised in that the connection surface between the first concrete-poured portion (403) and the second concrete-poured portion (404) is in the form of a slope inclined from the bottom up to the inside of the rectangular frame (5).

10. A fire-proof floor slab as claimed in claim 2, characterised in that the rectangular frame (5) is provided with a connecting piece (3) in the middle, and two ends of the connecting piece (3) are correspondingly connected with the two first frames (1).

11. A fire-resistant floor slab as claimed in claim 10, characterised in that the connecting member (3) is an angle steel and the connection between the connecting member (3) and the first frame (1) is a weld.