阅读说明：本技术 基于区域剪切强化的混凝土—clt组合楼板及其施工方法 (concrete-CLT (concrete-concrete composite) composite floor slab based on regional shear reinforcement and construction method thereof ) 是由 丁文胜 袁龙飞 刘佳宾 于 2021-09-13 设计创作，主要内容包括：本发明提供了一种基于区域剪切强化的混凝土—CLT组合楼板及其施工方法,其中,组合楼板包括CLT板、木条、自攻螺丝和混凝土板,若干所述木条通过若干所述自攻螺丝固定在所述CLT上,所述混凝土板浇筑在所述CLT板和木条上。本发明通过CLT板、木条、混凝土板和自攻螺钉的配合,实现区域化强化剪力连接的加固,在CLT板和混凝土板之间提供足够的连接强度和刚度,使得CLT板和混凝土板两种材料共同作用,充分发挥了材料性能,不仅提高了楼板刚度,还保证了CLT板和混凝土板连接处足够的强度和刚度。本发明提供的基于区域剪切强化的混凝土—CLT组合楼板,施工方便,绿色环保、节能节材。(The invention provides a concrete-CLT (concrete-concrete) composite floor slab based on regional shear reinforcement and a construction method thereof, wherein the composite floor slab comprises a CLT plate, battens, self-tapping screws and a concrete plate, the battens are fixed on the CLT through the self-tapping screws, and the concrete plate is poured on the CLT plate and the battens. According to the invention, through the matching of the CLT plate, the batten, the concrete plate and the self-tapping screw, the reinforcement of the regionalized reinforced shear connection is realized, and sufficient connection strength and rigidity are provided between the CLT plate and the concrete plate, so that the CLT plate and the concrete plate act together, the material performance is fully exerted, the rigidity of the floor slab is improved, and the sufficient strength and rigidity of the joint of the CLT plate and the concrete plate are ensured. The concrete-CLT composite floor slab based on regional shear reinforcement provided by the invention is convenient to construct, green, environment-friendly, energy-saving and material-saving.)

1. The concrete-CLT composite floor slab is characterized by comprising a CLT plate, battens, self-tapping screws and a concrete plate, wherein the battens are fixed on the CLT through the self-tapping screws, and the concrete plate is poured on the CLT plate and the battens.

2. The concrete-CLT composite floor slab based on regional shear strengthening of claim 1, wherein the self-tapping screws have tail portions located in the CLT and head portions protruding from the battens and located in the concrete slab.

3. The concrete-CLT composite floor slab based on regional shear strengthening of claim 1, wherein a plurality of the self-tapping screws are driven into the battens in a crossed manner at a certain inclination angle.

4. The concrete-CLT composite floor slab based on regional shear strengthening of claim 3, wherein the self-tapping screws are inclined at 45 ° to the battens.

5. The concrete-CLT composite floor slab based on regional shear strengthening of claim 1, wherein the CLT is provided with a plurality of transverse battens and a plurality of longitudinal battens.

6. The concrete-CLT composite floor slab based on regional shear strengthening of claim 5, wherein the battens are placed in parallel with the edges of the CLT slab, the size of the battens from the edges of the CLT slab is not smaller than the width of the battens, and the battens in the long span direction are arranged at intervals with the battens in the short span direction.

7. The concrete-CLT composite floor slab based on regional shear strengthening of claim 6, wherein the battens in the short span direction are arranged along the full span, and the length of the battens in the long span direction is not less than one fourth of the span length.

8. The concrete-CLT composite floor slab based on regional shear strengthening of claim 1, wherein the thickness of the concrete slab is two thirds of the thickness of the CLT slab, and the concrete slab is configured with a single layer of bidirectional steel bars.

9. The concrete-CLT composite floor slab based on regional shear reinforcement of claim 1, wherein the CLT slab has a thickness of not less than 50 mm;

the thickness of the wood strip is not less than 10 mm.

10. The construction method of the concrete-CLT composite floor slab based on the regional shear reinforcement of any one of claims 1 to 9, comprising the following steps:

s1, laying battens on the CLT board in the transverse direction and the longitudinal direction;

s2, on the wood strips which are well positioned and laid, self-tapping screws are used for driving the wood strips in a crossed mode along a certain inclination angle, the tail portions of the self-tapping screws are fixed in the CLT board, and the head portions of the self-tapping screws are exposed out of the wood strips;

and S3, pouring the concrete plate on the CLT plate and the wood strip.

Technical Field

The invention belongs to the technical field of civil engineering, and particularly relates to a concrete-CLT composite floor slab based on regional shear reinforcement and a construction method thereof.

Background

Orthogonal laminated wood (CLT) is an engineering wood board product which is formed by pressing 3-9 layers of solid wood sawn timber or structural composite boards into an orthogonal assembly by adopting a structural adhesive. The engineering wood material is characterized in that the wood with the specification that the transverse grains and the vertical grains are arranged in a staggered mode is glued together to improve the strength. The CLT can be widely applied to the wall, floor and roof parts of civil buildings and commercial high-rise buildings, and plays dual roles of building enclosure and bearing in the buildings. The building using the CLT plate has the advantages of factory customization, high prefabrication degree, simple field assembly, high efficiency, environmental protection, earthquake resistance, fire prevention and the like, and is one of the assembly structure building types with great national physical strength.

However, when the CLT is used for a floor slab, the rigidity is small and the load-bearing capability is insufficient.

Disclosure of Invention

In order to solve the problems, the invention provides a concrete-CLT composite floor slab based on regional shear strengthening, which comprises a CLT plate, battens, self-tapping screws and a concrete plate, wherein the battens are fixed on the CLT through the self-tapping screws, and the concrete plate is poured on the CLT plate and the battens.

Preferably, the tail part of the self-tapping screw is positioned in the CLT, and the head part of the self-tapping screw protrudes out of the wood strip and is positioned in the concrete slab.

Preferably, a plurality of the self-tapping screws are driven into the wood strips in a crossed manner along a certain inclination angle.

Preferably, the self-tapping screw and the wood bar are inclined at an angle of 45 °.

Preferably, the CLT is provided with a plurality of wood strips arranged transversely and a plurality of wood strips arranged longitudinally.

Preferably, the battens are arranged in parallel with the edges of the CLT board, the distance between the battens and the edges of the CLT board is not less than the width of the battens, and the battens in the long span direction and the battens in the short span direction are arranged at intervals.

Preferably, the battens in the short span direction are arranged along the full span, and the length of the battens in the long span direction is not less than one fourth of the span length.

Preferably, the thickness of the concrete slab is two thirds of the thickness of the CLT slab, and the concrete slab is provided with a single-layer bidirectional reinforcing steel bar.

Preferably, the thickness of the CLT plate is not less than 50 mm;

the thickness of the wood strip is not less than 10 mm.

The invention also provides a construction method of the concrete-CLT composite floor slab based on regional shear reinforcement, which comprises the following steps:

s1, laying battens on the CLT board in the transverse direction and the longitudinal direction;

s2, on the wood strips which are well positioned and laid, self-tapping screws are used for driving the wood strips in a crossed mode along a certain inclination angle, the tail portions of the self-tapping screws are fixed in the CLT board, and the head portions of the self-tapping screws are exposed out of the wood strips;

and S3, pouring the concrete plate on the CLT plate and the wood strip.

Compared with the prior art, the invention has the following technical effects:

according to the invention, through the matching of the CLT plate, the batten, the concrete plate and the self-tapping screw, the reinforcement of the regionalized reinforced shear connection is realized, and sufficient connection strength and rigidity are provided between the CLT plate and the concrete plate, so that the CLT plate and the concrete plate act together, the material performance is fully exerted, the rigidity of the floor slab is improved, and the sufficient strength and rigidity of the joint of the CLT plate and the concrete plate are ensured. The concrete-CLT composite floor slab based on regional shear reinforcement provided by the invention is convenient to construct, green, environment-friendly, energy-saving and material-saving.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:

fig. 1 is a schematic structural diagram of a concrete-CLT composite floor slab based on regional shear reinforcement according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a CLT board and batten combination according to a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;

fig. 4 is a cross-sectional view at B-B in fig. 1.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Referring to fig. 1 to 4, a concrete-CLT composite floor slab based on zone shear strengthening comprises a CLT slab 1, battens 2, self-tapping screws 3 and a concrete slab 4, wherein a plurality of battens 2 are fixed on the CLT by a plurality of self-tapping screws 3, and the concrete slab 4 is poured on the CLT slab 1 and the battens 2. In the embodiment, the wood strips 2 and the self-tapping screws are arranged on the interface of the CLT plate 1 and the concrete plate 4 to form the arrangement of a shear connection area, so that the CLT plate 1 and the concrete plate 4 are made of two materials to act together, the material performance is fully exerted, and the performance of a floor slab is effectively improved.

The tail part of the self-tapping screw 3 is positioned in the CLT, and the head part of the self-tapping screw protrudes out of the wood strip 2 and is positioned in the concrete plate 4.

In order to increase the connection strength, in the present embodiment, a plurality of self-tapping screws 3 are driven into the wood strips 2 in a crossed manner at a certain inclination angle. The inclination angle of the tapping screw 3 is not particularly limited in this embodiment, and may be set according to the actual dimensions of the CLT board 1, the batten 2, and the concrete board 4. The self-tapping screw 3 shown in fig. 2 to 4 has an inclination angle of 45 ° with the short side of the stick 2, and is perpendicular to the long side of the stick 2.

The arrangement of the battens 2 is not particularly limited, and in this embodiment, the CLT is provided with a plurality of battens 2 arranged horizontally and a plurality of battens 2 arranged longitudinally.

Further, the battens 2 are arranged in parallel with the edges of the CLT board 1, the size of the battens 2 from the edges of the CLT board 1 is not less than the width of the battens 2, and the battens 2 in the long span direction are spaced from the battens 2 in the short span direction appropriately.

The battens 2 in the short span direction are arranged along the full span, and the length of the battens 2 in the long span direction is not less than one fourth of the span length.

The thickness of the concrete slab 4 is two thirds of the thickness of the CLT slab 1, and a single-layer bidirectional reinforcing steel bar is configured on the concrete slab 4.

The thickness of the CLT plate 1 is not less than 50 mm;

the thickness of the wood strip 2 is not less than 10 mm.

The embodiment also provides a construction method of the concrete-CLT composite floor slab based on regional shear reinforcement, which comprises the following steps:

s1, laying battens 2 on the CLT board 1 in the transverse direction and the longitudinal direction;

s2, on the wood strips 2 which are well positioned and laid, self-tapping screws 3 are used for being driven into the wood strips 2 in a crossed mode along a certain inclination angle, the tail portions of the self-tapping screws 3 are fixed in the CLT board 1, and the head portions of the self-tapping screws are exposed out of the wood strips 2;

and S3, pouring the concrete plate 4 on the CLT plate 1 and the wood strip 2.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.