CN107476445A - A kind of orthogonal laminated wood wall dovetail interconnection technique and preparation method - Google Patents

Abstract

The invention relates to a cross-glued wood wall dovetail joint technology and a manufacturing method, and belongs to the technical field of wood engineering. The dovetail tenon connection structure of the cross-glued wood wall includes a dovetail tenon wall and a dovetail tenon wall. Dovetail grooves are milled longitudinally along the wall on the cross-laminated wood plane, and the angle of the dovetail grooves matches the dovetail head for processing. During the construction of the wooden structure building, the wall of the dovetail tenon and the wall of the dovetail tenon and groove are aligned and knocked in by hoisting to complete the connection. The invention is mainly applied in the wall connection of cross-glued timber structures, which combines the mortise and tenon structure in ancient Chinese buildings with the modern wood structure, which can not only meet the strength requirements of the wall connection nodes, but also realize factory prefabrication, and Can be quickly constructed on site.

Description

A cross-laminated wood wall dovetail joint technology and manufacturing method

Technical field:

The present invention relates to a cross-glued wood wall dovetail connection technology and a manufacturing method, specifically, a technology for connecting two cross-glued wood walls using a dovetail structure, and self-tapping screws or The adhesive reinforces the joint and belongs to the technical field of wood engineering.

technical background:

Cross-Laminated Timber (CLT for short) is a new type of engineered wood material made of standard timber criss-cross pavement. Cross-laminated timber has superior mechanical properties and stable in-plane performance. It can be used as the main building material to build medium and high-rise wooden structures, and it can also replace prefabricated concrete panels in general buildings. In recent years, medium and high-rise wood structure buildings have risen rapidly all over the world. The "Code for Design of Multi-Story Wooden Structures" promulgated by my country in 2017 has allowed the construction of medium and high-rise wooden structures. The existing "Code for Design of Wooden Structures" will also supplement the relevant content of CLT buildings in the latest revision. In terms of CLT production lines, there is currently a CLT prefabricated panel pilot production line independently developed by Ningbo Sino-Canada Low Carbon New Technology Research Institute in China. The future development of CLT construction in our country is very impressive.

In timber construction, suitable connectors are essential to fully express the material properties. Foreign researchers have found that the connection methods traditionally applied to CLT, including angle steel connection, anchor connection and self-tapping screw connection, cannot give full play to the superior performance of CLT. Mortise and tenon structure, as the main connection form in ancient wooden structures in my country, is the crystallization of the wisdom of the ancient Chinese people. It has good strength and can consume the impact of earthquakes on buildings. After the second industrial revolution, the handmade mortise and tenon structure was replaced by industrial mass-produced metal connectors and gradually disappeared. After entering the 21st century, computer numerical control technology has developed rapidly around the world, and the traditional mortise and tenon structure has been industrialized through this technology and has returned to people's sight. The cross-laminated wood wall dovetail joint technology involved in the present invention can realize factory processing and prefabricated production through the maturity of this computer control technology.

Invention content:

The object of the present invention is to propose a cross-laminated wood wall dovetail joint joint and a manufacturing method thereof. This connection technology combines modern wood structure building materials with the mortise and tenon connection form in traditional wood structure buildings in my country, and develops a new CLT mortise and tenon wall connection form, which will help the promotion of CLT buildings in my country. The manufacturing method of this technology is simple and feasible, and can be prefabricated in the factory.

The present invention can be realized through the following technical solutions:

1. A cross-glued wood wall dovetail joint technology and production method, comprising cross-glued wood materials, characterized in that two cross-glued wood materials are connected by dovetail tenon to form right-angle joints.

2. The preparation method of cross-laminated wood dovetail joint technology of the present invention comprises the following steps:

a) Prepare cross-laminated timber materials and saw them to proper size;

b) Dovetail tenons are processed longitudinally as a whole at the side end of a cross-laminated timber wall;

c) Mill the dovetail tenon groove longitudinally along the surface of the wall on another cross-glued wood plane, and the groove angle matches the dovetail tenon head for processing;

d) Ordinary connection: Align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon groove wall, and insert them longitudinally to complete the connection;

e) Nail reinforcement connection: Align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon wall, insert them longitudinally, pass self-tapping screws through the wall, and nail them into the tenon to complete the connection;

f) Glue reinforcement connection: Apply adhesive to the dovetail tenon or dovetail tenon groove, align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon groove wall, and embed them longitudinally to complete the connection.

3. The cross-glued wood wall dovetail joint technology is characterized in that the cross-glued wood specification timber should meet the requirements of the size, moisture content, density and mechanical strength of the cross-glued wood timber used.

4. The cross-glued wood wall dovetail joint technology is characterized in that the number of cross-glued wood board layers is n, and n≥3 (n∈N+).

5. The manufacturing method of the cross-laminated wood wall dovetail tenon connection technology, characterized in that the processing of the dovetail tenon can be done by hand, by a tenoning machine, a milling machine, or controlled by a computer digital machine tool.

6. The manufacturing method of the cross-glued wood wall dovetail tenon connection technology, characterized in that the depth of the dovetail tenon groove should not be less than the thickness of the outermost standard timber; the dovetail tenon width should not be greater than the thickness of the wall.

7. The ordinary connection in the dovetail tenon connection technology of the cross-glued wood wall is characterized in that no adhesive is applied to the dovetail tenon head and tenon groove.

8. The nail-reinforced connection in the method of making the cross-glued wood wall dovetail joint technology is characterized in that the strength of the self-tapping screw is 8.8; The effect shall prevail.

9. The nail reinforcement connection in the method of making the cross-glued wood wall dovetail joint technology is characterized in that the self-tapping screw spacing and edge distance should meet the relevant standards, and are arranged longitudinally along the height direction of the cross-glued wood wall.

10. Glue-reinforced connection in the manufacturing method of cross-glued wood wall dovetail joint technology, characterized in that the adhesive should be selected according to the specific use environment.

Description of drawings:

Fig. 1 is the cross-laminated wood wall dovetail structure of the present invention

Fig. 2 is the cross-laminated wood wall dovetail tenon and groove structure of the present invention

Fig. 3 is an assembly diagram of the cross-laminated wood wall dovetail of the present invention

The reference signs are explained as follows:

1-dovetail tenon; 2-dovetail tenon groove

detailed description:

In order to make the technical advantages and solutions of the present invention clearer, the specific implementation methods will be described below in conjunction with the accompanying drawings.

The cross-laminated timber wall dovetail joint connection structure in the example is as follows:

1. The standard timber used for cross-laminated timber is hemlock sawn timber imported from Canada, with a cross-sectional size of 38mm×140mm.

2. The moisture content of cross-laminated wood is 10%.

3. As shown in Figure 1, the cross-laminated wood wall dovetail structure of the present invention is shown.

4. As shown in Figure 2, the cross-laminated wood wall dovetail structure of the present invention is shown.

The dovetail tenons and dovetail tenon grooves of the cross-laminated timber walls are connected together. When constructing a CLT wooden structure building, the hoisting wall can be embedded into the fixed wall through the dovetail structure from above by hoisting to complete the connection of the building wall. The processing precision of dovetail tenons is different, and the connection tightness is slightly different.

A cross-laminated wood wall dovetail connection node and its manufacture include the following steps:

1) Prepare the cross-laminated timber material and cut it to an appropriate size;

2) Process the dovetail tenon along the longitudinal direction of the wall on the end face of a piece of cross-laminated wood;

3) Mill out the dovetail tenon groove along the longitudinal direction of the wall on another cross-glued wood plane, and process the dovetail tenon at an angle matched with the dovetail tenon head;

4) Ordinary connection: Align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon wall, and insert them vertically to complete the connection;

5) Nail reinforcement connection: Align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon groove wall, insert them longitudinally, pass the self-tapping screws through the wall, and nail them into the tenon to complete the connection;

6) Glue reinforcement connection: Apply adhesive to the dovetail tenon or dovetail tenon groove, align one end of the dovetail tenon on the wall with the notch on the other side of the dovetail tenon groove wall, and embed them longitudinally to complete the connection.

The test data show that the lateral strength of the dovetail joint structure of the cross-glued wood wall in the common connection form is 4-6kN; The dovetail structure can be improved by 30-40%.

Claims (10)

1. a kind of orthogonal laminated wood wall dovetail interconnection technique and preparation method, including orthogonal laminated wood material, it is characterized in that Dovetail feather joint is carried out to two blocks of orthogonal laminated wood materials, forms right angle connecting structure.

2. the preparation method of the orthogonal laminated wood dovetail interconnection technique of the present invention comprises the following steps：

A) orthogonal laminated wood material is prepared, is sawn to appropriate size；

B) dovetail rabbet working is generally longitudinally processed one piece of orthogonal laminated wood wall side；

C) dovetail slot is longitudinally milled out along surface of wall in another piece of orthogonal laminated wood plane, its included angle coordinates dovetail rabbet working It is processed；

D) generic connectivity：Wall is opened into dovetail rabbet working one end to open with another side the notch of dovetail slot wall and align, longitudinal direction is embedded, Complete connection；

E) nail reinforces connection：Wall is opened into dovetail rabbet working one end open with another side the notch of dovetail slot wall and align, longitudinal direction is embedding Enter, tapping screw is passed through into wall, hammer into tenon, complete connection；

F) glue reinforces connection：Apply adhesive in dovetail rabbet working or dovetail slot, wall is opened into dovetail rabbet working one end and another side The notch alignment of dovetail slot wall is opened, longitudinal direction is embedded, completes connection.

3. orthogonal laminated wood wall dovetail interconnection technique as claimed in claim 1, it is characterized in that, make orthogonal laminated wood rule Lattice material should meet the size of timber used in orthogonal laminated wood, moisture content, density and mechanical strength requirement.

4. orthogonal laminated wood wall dovetail interconnection technique as claimed in claim 1, it is characterized in that, orthogonal laminated wood sheet metal layer Number is n, and n >=3 (n ∈ N+).

5. orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, it is characterized in that, dovetail Processing can be manual processing, can be tenonen, milling machine processing or the processing of computer digit Machine-Tool Control.

6. orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, it is characterized in that, dovetail slot Depth should be not less than outermost layer dimension stock thickness；Dovetail width is not more than thickness of wall body.

7. generic connectivity in orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, its feature It is that dovetail rabbet working, tongue-and-groove do not apply any adhesive.

8. nail reinforces connection in orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, it is special Sign is that tapping screw intensity is 8.8 grades；Its length has reinforcement effect according to depending on thickness of wall body to hammer into dovetail rabbet working part It is defined.

9. nail reinforces connection in orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, it is special Sign is, tapping screw spacing, back gauge should meet relevant criterion, and along orthogonal laminated wood wall short transverse longitudinal arrangement.

10. glue reinforces connection in orthogonal laminated wood wall dovetail interconnection technique preparation method as claimed in claim 2, it is special Sign is that adhesive should be selected according to specifically used environment.

Orthogonal laminated wood connecting structure of wall made from a kind of either method with described in claim 1~10.