CN111980256A - A kind of self-insulation laminated floor slab and construction method thereof - Google Patents

Abstract

The invention discloses a self-insulation laminated floor slab and a construction method, which comprises a prefabricated base plate layer, a sandwich heat preservation layer and a cast-in-place concrete layer are sequentially arranged above the prefabricated base plate layer; Shear bond with low thermal conductivity. The construction method includes the following specific steps: 1) binding a prefabricated steel skeleton and a steel truss, and installing shear keys on the prefabricated steel skeleton, pouring concrete, and solidifying to obtain a prefabricated floor; 2) laying a sandwich insulation layer above the prefabricated floor, The reinforced truss is located in the sandwich insulation layer, and the upper end of the shear key exposes the sandwich insulation layer; 3) The precast concrete after laying the sandwich insulation layer is transported to the site for hoisting in place; 4) The cast-in-place steel skeleton is bound at the upper end of the shear key, and concrete is poured , obtain the cast-in-place concrete layer; 5) carry out the plastering of the bottom of the slab and the construction of the surface layer of the slab surface. The invention can not only ensure that the thermal insulation layer is not easily damaged, improve the user's use experience, but also can improve the thermal insulation effect.

Description

A kind of self-insulation laminated floor and construction method thereof

technical field

The invention relates to a heat-insulating laminated floor, in particular to a self-heat-insulating laminated floor and a construction method thereof.

Background technique

With the implementation of the "green building" development strategy, the country has higher and higher requirements for building energy conservation. In the past, only the outer walls and roofs needed insulation, but now the household floors also need insulation; therefore, the household floors on each floor are The thermal insulation layer needs to be installed. According to the different installation positions of the thermal insulation layer, there are two existing construction methods as follows: 1) the thermal insulation layer is above the structural layer; 2) the thermal insulation layer is below the structural layer. However, when the thermal insulation layer is above the structural layer, because the thermal insulation layer is generally made of relatively loose and soft materials, after the surface layer is applied on it, the surface layer is prone to uneven stress, resulting in cracks, and the user experience is not good. And when the building is redecorated, the thermal insulation layer is easily damaged by users, which affects the energy-saving effect of the building; when the thermal insulation layer is below the structural layer, in addition to being easily damaged and affecting the energy-saving effect, the adhesion with the plastering layer is limited. The plaster layer falls off easily. Therefore, the existing technology has the problems that the thermal insulation layer is easily damaged and the thermal insulation effect is not ideal.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a self-insulating laminated floor slab and a construction method thereof. The invention can not only ensure that the thermal insulation layer is not easily damaged, improve the user's use experience, but also can improve the thermal insulation effect.

The technical scheme of the present invention is as follows: a self-heat-insulating laminated floor comprises a prefabricated bottom layer, a sandwich insulation layer and a cast-in-place concrete layer are arranged above the prefabricated bottom layer in sequence;

In the aforementioned self-insulation laminated floor slab, a shear bond with low thermal conductivity is provided between the prefabricated base plate layer and the cast-in-place concrete layer.

In the aforementioned self-insulation laminated floor, the prefabricated bottom layer comprises a prefabricated concrete structure, and the prefabricated concrete structure is provided with a prefabricated steel skeleton, and the prefabricated steel skeleton is provided with a steel truss; the upper end of the steel truss is located in the sandwich insulation layer.

In the aforementioned self-heat-insulating laminated floor slab, the cast-in-place concrete layer includes a cast-in-place concrete structure, and the cast-in-place concrete structure is provided with a cast-in-place steel skeleton.

In the aforementioned self-insulation composite floor slab, the shear key is located between the prefabricated steel skeleton and the cast-in-place steel skeleton.

In the aforementioned self-insulation laminated floor, the shear key includes a shear key body, and the upper and lower ends of the shear key body are provided with a plurality of reinforcement installation grooves.

In the aforementioned self-insulation laminated floor, the shear key is a stainless steel shear key.

In the aforesaid self-heat-insulating laminated floor slab, a plastering layer is arranged below the prefabricated base plate layer.

In the aforementioned self-insulation composite floor slab, a surface layer is provided above the cast-in-place concrete layer.

In the aforementioned self-insulation composite floor slab, the sandwich insulation layer is foamed concrete.

A construction method for a self-insulating laminated floor slab, comprising the following specific steps:

1) Bind the prefabricated steel skeleton and the steel truss, install shear keys on the prefabricated steel skeleton, pour concrete, and obtain a prefabricated floor after curing;

2) Lay a sandwich insulation layer above the prefabricated bottom layer, the steel truss is located in the sandwich insulation layer, and the upper end of the shear key exposes the sandwich insulation layer;

3) Transport the precast concrete after laying the sandwich insulation layer to the construction site, and hoist it into place;

4) Bind the cast-in-place steel skeleton of the floor slab at the upper end of the shear key, and pour concrete to obtain a cast-in-place concrete layer;

5) Carry out the plastering of the bottom of the board and the surface layer construction of the board surface.

Compared with the prior art, in the present invention, a sandwich insulation layer is arranged between the prefabricated floor layer and the cast-in-place concrete layer, and the insulation layer is creatively arranged inside the laminated floor slab. On the premise of ensuring the structural strength of the laminated floor slab, both It can ensure that the sandwich insulation layer is not easy to be damaged twice, improve the user's experience (including the surface layer and the plastering layer are not easy to crack), and can also improve the overall thermal insulation performance of the laminated floor slab. At the same time, the present invention reduces the heat transfer between the prefabricated bottom layer and the cast-in-place concrete layer by reducing the height of the steel bar truss and arranges the steel bar truss in the sandwich insulation layer; A shear key with low thermal conductivity is set between the two parts, and the structure of the shear key can be reasonably designed so that it can meet the force transmission requirements between the prefabricated base plate and the cast-in-place concrete, so that the existence of cold and hot bridges can be greatly reduced, and the realization of The purpose of improving thermal insulation performance. In addition, in the present invention, the reinforcement installation grooves are arranged at the upper and lower ends of the shear key, so that the reinforcement can be fully combined with the reinforcement frame and the overall structural strength can be improved. The self-heat-insulating laminated floor slab prepared by the invention also has better sound insulation and vibration isolation performance than ordinary floor slabs, and can also be used for positions with high requirements for sound insulation and vibration isolation. To sum up, the present invention can not only ensure that the thermal insulation layer is not easily damaged, improve the user's use experience, but also improve the thermal insulation effect.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a structural view of a prefabricated steel skeleton;

Fig. 3 is the structural view of prefabricated base plate layer;

Figure 4 is a structural view of a sandwich insulation layer;

Figure 5 is a structural view of a prefabricated steel skeleton;

Fig. 6 is a structural view of a shear bond.

The symbols in the drawings are: 1- prefabricated base plate layer, 2- sandwich insulation layer, 3- cast-in-place concrete layer, 4- shear key, 101- prefabricated concrete structure, 102- prefabricated steel skeleton, 103- steel truss, 301 - Cast-in-place concrete structure, 302- cast-in-place steel skeleton, 401- shear key body, 402- steel installation groove, 5- plastering layer, 6- surface layer.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

Example. A self-insulating laminated floor slab is composed as shown in Figures 1 to 6, and includes a prefabricated base plate layer 1, and a sandwich insulation layer 2 and a cast-in-place concrete layer 3 are sequentially arranged above the prefabricated base plate layer 1; the prefabricated base plate layer 1 and the sandwich Rebar trusses 103 are arranged between the thermal insulation layers 2 .

A shear key 4 with low thermal conductivity is arranged between the prefabricated base plate layer 1 and the cast-in-place concrete layer 3 .

The prefabricated bottom layer 1 includes a prefabricated concrete structure 101 . The prefabricated concrete structure 101 is provided with a prefabricated steel frame 102 , and the prefabricated steel frame 102 is provided with a steel truss 103 ; the upper end of the steel truss 103 is located in the sandwich insulation layer 2 .

The cast-in-place concrete layer 3 includes a cast-in-place concrete structure 301 , and a cast-in-place concrete structure 301 is provided with a cast-in-place steel frame 302 .

The shear key 4 is located between the prefabricated steel frame 102 and the cast-in-place steel frame 302 .

The shear key 4 includes a shear key body 401 , and the upper and lower ends of the shear key body 401 are provided with a plurality of reinforcement installation grooves 402 .

The shear key 4 is a stainless steel shear key.

A plastering layer 5 is arranged below the prefabricated base plate layer 1 .

A surface layer 6 is provided above the cast-in-place concrete layer 3 .

The sandwich insulation layer 2 is foamed concrete.

The thickness of the plastering layer is 10mm, the thickness of the prefabricated bottom layer is 60mm, the thickness of the sandwich insulation layer is 30mm, the thickness of the cast-in-place concrete layer is 70mm, and the thickness of the surface layer is 30mm.

A construction method for a self-insulating laminated floor slab, comprising the following specific steps:

1) Bind the prefabricated steel skeleton and the steel truss, install shear keys on the prefabricated steel skeleton, pour concrete, and obtain a prefabricated floor after curing;

2) Lay a sandwich insulation layer above the prefabricated bottom layer, the steel truss is located in the sandwich insulation layer, and the upper end of the shear key exposes the sandwich insulation layer;

3) Transport the precast concrete after laying the sandwich insulation layer to the construction site, and hoist it into place;

4) Bind the cast-in-place steel skeleton of the floor slab at the upper end of the shear key, and pour concrete to obtain a cast-in-place concrete layer;

5) Carry out the plastering of the bottom of the board and the surface layer construction of the board surface.

Claims (10)

1. A self-heat-insulating laminated floor slab, characterized in that: comprising a prefabricated base plate layer (1), and above the prefabricated base plate layer (1), a sandwich insulation layer (2) and a cast-in-place concrete layer (3) are sequentially provided; A steel bar truss (103) is arranged between (1) and the sandwich insulation layer (2). 2. A self-heat-insulating laminated floor slab according to claim 1, characterized in that: a shear key (4) with low thermal conductivity is provided between the prefabricated base plate layer (1) and the cast-in-place concrete layer (3). ). 3. A self-insulating laminated floor slab according to claim 2, characterized in that: the prefabricated bottom layer (1) comprises a prefabricated concrete structure (101), and a prefabricated concrete structure (101) is provided with a prefabricated steel skeleton (101). 102); the bottom of the steel truss (103) is connected to the prefabricated steel skeleton (102), and the upper end of the steel truss (103) is located in the sandwich insulation layer (2). 4. A self-insulating laminated floor slab according to claim 3, characterized in that: the cast-in-place concrete layer (3) comprises a cast-in-place concrete structure (301), and the cast-in-place concrete structure (301) is provided with a cast-in-place concrete structure (301). Pouring the steel frame (302). 5 . The self-insulating laminated floor slab according to claim 4 , wherein the shear key ( 4 ) is located between the prefabricated steel frame ( 102 ) and the cast-in-place steel frame ( 302 ). 6 . 6. A self-insulating laminated floor slab according to claim 2, wherein the shear key (4) comprises a shear key body (401), and the upper and lower ends of the shear key body (401) are provided with There are multiple rebar installation slots (402). 7. A self-insulating laminated floor slab according to claim 2, characterized in that: the shear key (4) is a stainless steel shear key. 8. A self-heat-insulating laminated floor slab according to claim 1, characterized in that: a plastering layer (5) is arranged below the prefabricated floor (1); a surface layer (5) is arranged above the cast-in-place concrete layer (3). 6). 9 . The self-insulation laminated floor slab according to claim 1 , wherein the sandwich insulation layer ( 2 ) is foamed concrete. 10 . 10. A construction method for self-insulation laminated floor slabs, characterized in that, comprising the following concrete steps: 1) Bind the prefabricated steel skeleton and the steel truss, install shear keys on the prefabricated steel skeleton, pour concrete, and obtain the prefabricated floor after curing; 2) Lay a sandwich insulation layer above the prefabricated bottom layer, the steel truss is located in the sandwich insulation layer, and the upper end of the shear key exposes the sandwich insulation layer; 3) Hoist the precast concrete after laying the sandwich insulation layer in place; 4) Bind the cast-in-place steel skeleton of the floor slab at the upper end of the shear key, and pour concrete to obtain a cast-in-place concrete layer; 5) Carry out the plastering of the bottom of the board and the surface layer construction of the board surface.

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