CN209580731U - A new type of CLT board with zigzag interlayer gluing - Google Patents

Abstract

A new type of CLT board with zigzag interlayer gluing, the new type of CLT board is composed of a core layer and a surface layer, and the core layer and the surface layer all have corresponding concave (convex) grooves; CLT boards are generally composed of odd layers The panels are glued together, and the middle core layer is laminated with the panels with convex (concave) grooves on both sides and the core layers on both sides with concave (convex) grooves on the adjacent two sides. In this way, the number of panels required by the project is pasted in sequence until the last layer is bonded to the adjacent core layer with a unilateral concave (convex) groove; during this bonding process, the grooves and convex grooves (convex grooves and grooves) between adjacent panels Fitted together, and the panels of each layer are glued together orthogonally with epoxy resin structural adhesive. Compared with the existing gluing method, the utility model has the following advantages: the embossed grooves are used between the layers of boards, which can make the connection between the boards tighter and not easy to peel off, thereby improving the overall performance of the CLT board.

Description

A new type of CLT board with zigzag interlayer gluing

technical field

The invention belongs to the technical field of civil engineering and construction, and relates to building components, in particular to a novel CLT board in a zigzag interlayer glued mode.

Background technique

The application and research of CLT panels in building structures has been favored at home and abroad in recent years. The CLT board is formed by orthogonal gluing between adjacent panels, and it has the same dry shrinkage and wet expansion performance in the primary and secondary directions of the material, so its dimensional stability is 12 times that of solid wood and other glued wood. ;Due to the particularity of its tissue embryo, its rolling shear performance is low; compared with the traditional light frame construction, the cross-sectional size of CLT building components is larger, and the surface carbonization forms an insulating protective layer during combustion, which effectively improves its performance in Bearing capacity in fire; CLT can be mass-produced and prefabricated in the factory, and can be processed into floor panels, beams, columns and wall panels of any suitable size, door and window opening specifications according to engineering design requirements, and these components can be directly transported to the site quickly The installation greatly shortens the installation period of the building, and is a green and environmentally friendly structural component. For the existing CLT board structure that is more commonly used, its strength utilization rate and some other mechanical performance indicators are not superior, and most of the current plywood is directly glued by laying the panels. Under the long-term load, the plywood The bonding performance between layers is greatly reduced, or peeling occurs, which affects the overall performance of the structure.

Scholars at home and abroad have also conducted a lot of research on the above problems. Most of its research directions can be divided into the following aspects. The first aspect is to study the type of adhesive used for bonding between layers, such as other adhesives such as epoxy resin adhesive or phenolic resin adhesive. Although the stability of the adhesive is good, its harmful substances (such as formaldehyde) ) content is high and uneconomical, and if the time is too long, it is also prone to aging phenomenon, which makes it easy to fall off between layers. In the second aspect, during the gluing process, a special bonding layer is set between the layers. For example, some scholars add one or more layers of FRP between the layers, although it can increase the overall performance of the CLT board. But the cost is too high. The third aspect is to install a kind of embedding device between adjacent laminates. For example, some scholars set corresponding grooves on the adjacent surfaces of adjacent panels, and set steel bars between the corresponding grooves so that adjacent Layer panels are firmly combined, although the method can effectively overcome the detachment between layers, but its gluing process and design process are relatively complicated and uneconomical.

Contents of the invention

In order to overcome the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of novel CLT board of zigzag interlayer gluing mode, can guarantee to prevent peeling between plywood layer and layer under long-term load, can make gluing again The process of crafting and design is simplified, and it is economical and environmentally friendly.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A new type of CLT board with zigzag interlayer gluing method, comprising an upper layer 1, a lower layer 3 and a core board 2, the core board 2 is one or more layers;

When it is one layer, its upper surface is provided with several convex grooves 6, and the lower surface is provided with several convex grooves 5, and the lower surface of the upper layer 1 is provided with a concave that can be matched and fitted with the convex groove 1. Groove 1 7, the upper surface of the lower layer 3 is provided with a groove 2 4 capable of matching and fitting with the convex groove 2 5;

When it is multi-layer, the upper surface of the uppermost core board 2 is provided with some convex grooves 16, and the lower surface of the lowermost core board 2 is provided with some convex grooves 25, between adjacent layer core boards 2 Concave-convex groove fitting connection, the lower surface of the upper layer 1 is provided with a groove one 7 that can match and fit with the convex groove one 6, and the upper surface of the lower layer 3 is provided with a groove that can match the convex groove two 5. Fitting groove two 4.

The core board 2 is made of fast-growing wood, such as poplar or willow, and the upper board 1 and the lower board 3 are made of hemlock, and are glued orthogonally with the core board 2 to form a CLT board.

Between the upper laminate 1 and the core laminate 2, between the adjacent core laminates 2, and between the core laminate 2 and the lower laminate 3, including between the concave and convex grooves, epoxy resin structure is adopted. The adhesive is glued together orthogonally, that is, the fiber directions of adjacent layers are perpendicular to each other, and the stability and integrity of the component are increased by applying pressure.

The upper laminate 1, the lower laminate 3 and the core laminate 2 are formed by selecting appropriate quantity and size of specification wood according to the size of the components.

The convex groove 2 5 and the convex groove 1 6 can adopt any suitable shape, and the shapes of the corresponding groove 2 4 and the groove 1 7 also change accordingly, only need to ensure that the respective corresponding grooves and convex grooves can be completely fit together. That is, no matter what shape the concave-convex groove adopts, the convex grooves and grooves between adjacent core boards 2 and the convex grooves and grooves between the core board 2 and the upper and lower layers should be fitted together.

The shapes of the second convex groove 5 and the first convex groove 6 and the corresponding groove two 4 and the first groove 7 can be determined according to engineering requirements and processing convenience. The number of layers of fast-growing wood panels can be adjusted according to engineering needs and component bearing capacity requirements.

The corresponding geometric dimensions of the second convex groove 5 and the first convex groove 6 and the corresponding groove two 4 and the first groove 7 are determined according to the component size and bearing capacity requirements.

Compared with the prior art, the beneficial effect of the present invention is: a new type of CLT board with zigzag interlayer gluing method of the present invention, each layer of the plywood is bonded by notches, which increases the bonding between the boards. The firmness of the board improves the integrity of the CLT board, and its gluing process and design process are simple, economical and environmentally friendly.

Description of drawings

Fig. 1 is a schematic diagram of a CLT component of the present invention which is formed by gluing three layers of wood-gauge lumber.

Fig. 2 is a schematic diagram of a CLT member of the present invention glued with five layers of timber gauges.

Fig. 3 is a schematic diagram of the core board of the present invention (with convex grooves).

Fig. 4 is a schematic diagram of the core board of the present invention (with grooves).

Fig. 5 is a schematic diagram of the facing board of the present invention.

Fig. 6 is a schematic diagram of a component adopting a trapezoidal interface notch in the present invention.

Note: In order to facilitate observation, the panels of adjacent layers are separated by a certain distance.

Detailed ways

The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

Example 1

As shown in Figure 1, a new type of CLT board with zigzag interlayer glueing method is a CLT member made of three layers of wood-gauge lumber glued together, including an upper layer 1, a lower layer 3 and a core Laminate 2. The core board 2 is made of poplar, a fast-growing wood, and the upper board 1 and the lower board 3 are made of hemlock, and are glued orthogonally with the core board 2 to form a CLT board.

Wherein, as shown in FIG. 3 , the upper surface of the core board 2 is provided with several convex grooves 1 6 , and the lower surface is provided with several convex grooves 2 5 .

As shown in Figure 5, the lower surface of the upper laminate 1 is provided with a groove one 7 that can be matched and fitted with the convex groove one 6, and the upper surface of the lower laminate 3 is provided with a concave groove that can be matched and fitted with the convex groove two 5 Slot two 4.

The concave and convex grooves on the upper laminate 1, the core laminate 2, and the lower laminate 3 are opposite, and the adjacent layers are glued together with epoxy resin structural adhesive orthogonally, and pressurized to increase the stability and stability of the components. Wholeness.

The distribution of the above-mentioned concave-convex grooves is arranged along the long direction of the beam (slab).

Example 2

As shown in Figure 2, a new type of CLT board with zigzag interlayer gluing is a CLT member made of five layers of wood-gauge lumber glued together, including an upper layer 1, a lower layer 3 and three cores Laminate 2. The core layer board 2 is made of poplar, a fast-growing wood, and the upper layer board 1 and the lower layer board 3 are made of hemlock.

Wherein, as shown in FIG. 3 , the upper surface of the uppermost core board 2 is provided with several convex grooves 1 6 , and the lower surface of the lowermost core board 2 is provided with several convex grooves 2 5 .

And the adjacent layer core boards 2 are still combined together with the concave-convex groove structure, the upper and lower surfaces of a certain layer of core boards 2 are convex grooves, and the upper and lower surfaces of the adjacent core boards 2 are grooves, such as As shown in Fig. 4, the upper or lower surface of a certain layer of core board 2 may be a convex groove, and the other surface may be a groove, and the adjacent surface of the core board 2 may also be modified accordingly.

As shown in Figure 5, the lower surface of the upper laminate 1 is provided with a groove one 7 that can be matched and fitted with the convex groove one 6, and the upper surface of the lower laminate 3 is provided with a concave groove that can be matched and fitted with the convex groove two 5 Slot two 4.

The concave-convex grooves on the upper laminate 1, each core laminate 2, and the lower laminate 3 are opposite, and the adjacent layers are glued together with epoxy resin structural adhesive orthogonally, and the stability of the components is increased by applying pressure. and wholeness.

In the present invention, the upper layer 1, the lower layer 3 and the core board 2 all need to select appropriate quantity and size of specification wood according to the size of the components.

In the present invention, convex groove 2 5 and convex groove 1 6 can adopt any suitable shape, and the shapes of corresponding groove 2 4 and groove 1 7 also change accordingly, only need to ensure that the respective corresponding grooves and convex grooves It can be completely fitted together, which can be determined according to engineering needs and processing convenience, such as the trapezoidal interface notch form shown in Figure 6 . That is, no matter what shape the concave-convex groove adopts, the convex grooves and grooves between adjacent core boards 2 and the convex grooves and grooves between the core board 2 and the upper and lower layers should be fitted together. Convex groove 2 5 and convex groove 1 6 and corresponding groove groove 2 4 and groove 1 7 determine their corresponding geometric dimensions according to component size and bearing capacity requirements.

The manufacturing process of the present invention: firstly spread the core plate 2 made of fast-growing wood and provided with several convex grooves on both sides, and then spread the vertical orthogonal group embryo of the upper layer plate 1 with corresponding several grooves on the The upper surface of the core board 2 is fitted with grooves and convex grooves on the upper surface of the core board 2, and glued together with epoxy resin structural adhesive, and then the lower board with corresponding grooves 3 The vertical orthogonal embryos are tiled on the lower surface of the core plate 2, and the grooves are fitted together with the convex grooves on the lower surface of the core plate 2, and glued together with epoxy resin structural adhesive, and finally the component Compressed with a press.

The principle of the present invention: in the present invention, concave-convex grooves are used to fit each layer of the boards, so that the contact area between the panels of each layer is larger, and the connection between the boards can be made closer, and the concave-convex grooves between adjacent panel layers The embedding makes it difficult to slip and peel off between the panel layers, thereby improving the overall performance of the CLT board.

Claims (5)

1. a kind of novel C LT plate of zigzag interlayer gluing mode, including upper layer (1), cutting optimal (3) and middle layer plate (2), It is characterized in that, the middle layer plate (2) is one layer or multilayer；

When for one layer, upper surface is provided with several tongues one (6), and lower surface is provided with several tongues two (5), described above The lower surface of layer (1) is provided with groove one (7) that can be chimeric with tongue one (6) matching, the upper surface setting of cutting optimal (3) There is groove two (4) that can be chimeric with tongue two (5) matching；

When for multilayer, the upper surface of top layer's middle layer plate (2) is provided with several tongues one (6), under lowest level middle layer plate (2) Surface is provided with several tongues two (5), and adjacent layer middle layer plate is fitting to connection between (2) with tongue and groove, under the upper layer (1) Surface is provided with groove one (7) that can be chimeric with tongue one (6) matching, and the upper surface of cutting optimal (3) is provided with can be with institute State the chimeric groove two (4) of tongue two (5) matching.

2. the novel C LT plate of zigzag interlayer gluing mode according to claim 1, which is characterized in that the middle layer plate (2) Using fast growing wood, the upper layer (1) and cutting optimal (3) use hemlock.

3. the novel C LT plate of zigzag interlayer gluing mode according to claim 2, which is characterized in that the fast growing wood For poplar or willow.

4. the novel C LT plate of the zigzag interlayer gluing mode according to Claims 2 or 3, which is characterized in that each adjacent layer Machine direction is mutually perpendicular to.

5. the novel C LT plate of zigzag interlayer gluing mode according to claim 1, which is characterized in that the upper layer (1) Between middle layer plate (2), epoxy resin is all made of between adjacent middle layer plate (2) and between middle layer plate (2) and cutting optimal (3) Sqtructural adhesive is orthogonal glued together, and passes through pressurization, the stability and globality of Lai Zengjia component.