Bamboo-wood composite wall

Abstract

The utility model belongs to the technical field of assembled green building material, specifically relates to a bamboo -wood composite wall, including panel and bearing structure, the bearing structure includes the bamboo tube of being located in the one side of panel, bamboo tube outside fills with intermediate material, the utility model discloses being equipped with a plurality of bamboo tubes between the panel, and the structure of bamboo tube is special, it is hollow bamboo joint structure, and hollow structure has reduced the overall weight of wall body greatly, and bamboo joint structure has guaranteed the support ability of bamboo tube, is helpful to promote the carrying capacity of wall body, fills the adhesive, foaming glue or aerogel in composite wall, improves the connecting strength between bamboo tube, wood stand column and / or bamboo tube and wood stand column and panel in wall body, limits the lateral displacement when bamboo tube stress, makes bamboo tube, wood column, crossbeam, panel form a whole, has improved overall strength, and the intermediate material that fills has the heat preservation effect, improves the impact resistance and the bending performance of wall body, relative solid plate structure, sandwich structure is a material distribution is more reasonable lightweight structure, improves its carrying capacity and structural stability while guaranteeing wall body lightweight, and the internal structure of bamboo tube forms independent cavity, and is independently closed in the intermediate material between two panels, makes the whole reach better heat preservation effect, can also set the number of intermediate bamboo tube and filling material space according to the different carrying capacity required by the building storey, saves the construction cost, and can reach the safety performance.

Description

Technical Field

[0001] This utility model relates to a bamboo-wood composite wall, belonging to the technical field of prefabricated green building materials. Background Technology

[0002] Under the "dual-carbon" strategy of "peak carbon and carbon neutrality," green building materials have become an important development direction for the construction industry. Wood and bamboo, as renewable natural building materials, not only absorb carbon dioxide and release oxygen, but also possess excellent mechanical properties, environmental friendliness, and sustainability. Bamboo processing has low carbon emissions, and its load-bearing strength even exceeds that of steel. Existing technologies have led to the development of large-format wood, bamboo, and bamboo-wood composite wall systems. However, when existing bamboo and wood materials are combined to form large-format load-bearing walls, solid structures such as reconstituted wood, reconstituted bamboo, cross-laminated timber (CLT), or bamboo-wood composites are generally used. While solid structures increase strength and load-bearing capacity, they also increase material usage and cost. For example, CLT is made by planing solid wood boards on all four sides and gluing them together in multiple layers, resulting in a higher market price. To produce large-format bamboo panels, bamboo tubes typically need to be split open or steamed at high temperatures to flatten the bamboo walls, resulting in bamboo strips. Because the root of the bamboo has a larger diameter and thicker walls, while the tip has a smaller diameter and thinner walls, the width and thickness of the bamboo strips differ significantly at both ends. This necessitates processing the strips to achieve the same thickness and width at both ends, leading to significant waste of materials and labor costs. Therefore, bamboo plywood is more expensive than wood plywood. Reconstituted bamboo and wood require large amounts of adhesives and resins, with densities sometimes exceeding 1.2 t / m³. 3 However, high-density bamboo is more expensive, and its insulation performance is relatively poor, generally requiring an additional insulation layer on top of the wall. More importantly, no matter how the bamboo strips are combined after processing the same amount of raw bamboo, they no longer possess the axial support strength of the original bamboo. These combined factors limit its widespread application in the construction industry.

[0003] Therefore, there is an urgent need to develop a new type of bamboo-wood composite wall that can reduce costs while ensuring its load-bearing capacity and structural stability, increase its thermal insulation properties, and be suitable for factory assembly line operations, so as to meet the modern building's demand for wall panels that are high-efficiency, high-strength, low-carbon, environmentally friendly, and sustainable. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a bamboo-wood composite wall.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A bamboo-wood composite wall includes a panel and a load-bearing structure. The load-bearing structure includes multiple bamboo tubes disposed on one side of the panel, and the outer side of the bamboo tubes is filled with an intermediate material.

[0006] The beneficial effects of this utility model are as follows: This utility model incorporates multiple bamboo tubes between the panels, featuring a hollow bamboo joint structure. This hollow structure significantly reduces the overall weight of the wall, while the bamboo joint structure and the vertical compressive strength of the bamboo ensure high support capacity of the bamboo tubes, thus enhancing the wall's load-bearing capacity, impact resistance, and bending resistance. This design improves the wall's load-bearing capacity and structural stability while maintaining its lightweight nature. Compared to solid panel structures, the sandwich structure offers a more rational material distribution for lightweight construction. Furthermore, the internal structure of the bamboo tubes forms independent cavities, which are independently sealed within the intermediate material, resulting in better overall insulation.

[0007] Based on the above technical solution, the present invention can be further improved as follows: Furthermore, the panel consists of two parts, and the load-bearing structure is located between the two panels.

[0008] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: by sandwiching multiple bamboo tubes of the load-bearing structure in the middle through two panels, the bamboo tubes can better perform their load-bearing function and improve their load-bearing capacity, while the panels can also provide a certain load-bearing function; furthermore, by filling the outside of the bamboo tubes with intermediate material, in addition to providing heat insulation, the bamboo tubes can also be fixed, limiting the lateral displacement of the bamboo tubes when under force, enhancing the connection strength between the bamboo tubes and the panels, forming a whole, and further improving the load-bearing capacity and structural stability of the composite wall.

[0009] Furthermore, the smaller diameter ends of adjacent bamboo tubes face opposite directions.

[0010] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Due to the characteristics of bamboo growth, bamboo is generally shaped with a large diameter at the root (large diameter end) and a small diameter at the top (small diameter end). If the bamboo tubes are arranged in a longitudinal direction, the large diameter ends of adjacent bamboo tubes will contact or be close to each other, but the distance between the small diameter ends will be relatively far. This may cause the small diameter ends of the bamboo tubes to shift or bend. Due to the special structure of bamboo tubes, if the bamboo tube is subjected to force in a vertical direction, its multiple bamboo nodes can bear the weight well and distribute the force. However, if the top of the bamboo tube is shifted or bent significantly, it may cause a change in the direction of force on the bamboo tube. When bearing weight, the bamboo nodes cannot play their maximum role, affecting the load-bearing effect. This utility model, by having the small diameter ends of adjacent bamboo tubes face opposite directions, makes the bamboo tubes arranged in an alternating pattern of large and small diameter ends, reducing the space for the small diameter ends of the bamboo tubes to shift or bend when subjected to force. This reduces the space required to fill the middle material inside, saving costs, and increases the number of bamboo tubes arranged, thereby improving the load-bearing capacity of the bamboo tubes in this utility model.

[0011] Furthermore, the bamboo tubes are arranged continuously.

[0012] The beneficial effects of adopting the above-mentioned further technical solutions are: the continuous arrangement of bamboo tubes allows adjacent bamboo tubes to be closely arranged, thereby improving the overall load-bearing capacity of the wall.

[0013] Furthermore, the load-bearing structure also includes wooden pillars, which are arranged between the bamboo tubes and are parallel to the bamboo tubes.

[0014] The beneficial effects of adopting the above-mentioned further technical solutions are: the cross-sectional area and number of wooden columns can be adjusted according to the required load-bearing capacity of the wall. Using large-section wooden columns as load-bearing structures between the panels can improve the load-bearing capacity of the composite wall without causing a significant increase in the weight of the wall. Moreover, the vertical wooden columns and the horizontal beams can be connected by tenons, round wooden sticks or long wooden screws to form an outer frame, which makes it easier to connect adjacent wall panels and floor slabs.

[0015] Furthermore, the wooden pillars are made of square timber, round timber, flat timber strips, wooden boards, glued laminated timber, or bamboo-wood composite boards.

[0016] Furthermore, the opposite surfaces of adjacent bamboo tubes are flattened.

[0017] The beneficial effect of adopting the above-mentioned further technical solutions is that the contact surface or adjacent surface of the bamboo tubes is flattened, so that the bamboo tubes can be arranged more closely, thereby further improving the load-bearing capacity of the composite wall.

[0018] Furthermore, the bamboo-wood composite wall also includes a frame structure, which includes crossbeams.

[0019] Furthermore, the frame structure also includes side panels disposed on the left and right sides of the panel.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are: the upper and lower ends of the bamboo tube are in contact with the crossbeams of the frame structure and combined together. The frame structure and the two panels cover the bamboo tube and the middle material to form an integrated wall panel, which helps to improve the load-bearing capacity of the wall and improve the impact resistance and bending resistance of the wall. This allows the composite wall of this utility model to be used as an infill interior wall or as an exterior wall. The frame structure can provide better support and load-bearing function and achieve an aesthetic effect.

[0021] Furthermore, the panel and the frame structure are selected from any one of solid wood boards, laminated boards, OSB boards (Oriented Strand Board), glued laminated wood, spliced ​​wood boards, spliced ​​bamboo boards, MDF, honeycomb boards, fiberboard, or bamboo-wood composite boards.

[0022] Furthermore, a flame-retardant layer is provided on the outer side of the panel.

[0023] Furthermore, the flame-retardant layer is selected from any one of wood panels, bamboo panels, wood-bamboo composite panels, aerogel materials, fire-retardant polyurea, or fire-retardant boards.

[0024] The beneficial effect of adopting the above-mentioned further technical solutions is that by setting a flame-retardant layer, the composite wall of this utility model can be adapted to the application scenarios of interior and exterior walls of buildings, thereby improving the practicality of the composite wall.

[0025] Furthermore, the intermediate material is an adhesive, foam, or aerogel.

[0026] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: by filling the composite wall with adhesives, foaming agents or aerogels, the connection strength between bamboo tubes, wooden columns and / or bamboo tubes and wooden columns and panels in the wall is improved, the lateral displacement of bamboo tubes under force is restricted, and the bamboo tubes, wooden columns, beams and panels are formed into a whole, which improves the overall strength. In addition, the filling intermediate material has a heat insulation effect, which enhances the practicality of the composite wall of this utility model.

[0027] Furthermore, the intermediate material is a thermal insulation material.

[0028] The beneficial effects of adopting the above-mentioned further technical solutions are: improving the thermal insulation performance of the composite wall by filling it with thermal insulation material, reducing the cost of use, and improving the practicality of this utility model.

[0029] Furthermore, the panel is provided with windows or doorways.

[0030] The beneficial effect of adopting the above-mentioned further technical solutions is that by setting door openings or windows on the panel, the composite wall of this utility model can be used as an exterior wall to install windows or doors as needed.

[0031] Furthermore, two or more bamboo tubes form a support structure, and a cavity is provided between adjacent support structures.

[0032] The beneficial effects of adopting the above-mentioned further technical solutions are: while ensuring load-bearing capacity, by setting up cavities, the weight of the composite wall of this utility model is further reduced, thus saving costs.

[0033] Furthermore, the bamboo tubes are arranged continuously, and the opposite surfaces of adjacent bamboo tubes are flattened.

[0034] Furthermore, the bamboo tube array has two or more rows.

[0035] The beneficial effects of adopting the above-mentioned further technical solutions are: when the composite wall of this utility model is used as the load-bearing wall of a high-rise building, the wall needs to have a high load-bearing capacity. If the strength of a single row of bamboo tubes cannot meet the load-bearing capacity required by the wall, two or more rows of bamboo tubes can be arranged in the wall as needed, which increases the load-bearing capacity and improves the heat preservation effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model; Figure 3 This is a three-dimensional structural diagram of Embodiment 2 of the present invention; Figure 4 This is a top view of Embodiment 2 of the present invention; Figure 5 This is a side view of Embodiment 2 of the present invention; Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the structure of a bamboo tube; Figure 8 This is a three-dimensional structural diagram of Embodiment 3 of the present invention; Figure 9 This is a cross-sectional view of Embodiment 3 of the present invention; Figure 10 This is a three-dimensional structural diagram of Embodiment 4 of the present invention; Figure 11 This is a cross-sectional view of Embodiment 4 of the present invention; Figure 12 This is a cross-sectional view of Embodiment 5 of the present invention; Figure 13 This is a cross-sectional view of Embodiment 6 of the present invention; Figure 14 This is a cross-sectional view of Embodiment 8 of the present invention; Figure 15 This is a cross-sectional view of Embodiment 7 of the present invention; Figure 16 This is a cross-sectional view of Embodiment 9 of the present invention; Figure 17 This is a cross-sectional view of Embodiment 10 of the present utility model.

[0037] The attached diagram is labeled as follows: 1. Panel; 2. Horizontal beam; 3. Side panel; 4. Bamboo tube; 401. Large diameter end; 402. Small diameter end; 5. Wooden column; 6. Intermediate material. Detailed Implementation

[0038] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0039] Example 1 See Figure 1-2 A bamboo-wood composite wall includes a panel 1 and a load-bearing structure. The load-bearing structure includes multiple bamboo tubes 4 disposed on one side of the panel 1. The multiple bamboo tubes 4 are arranged in parallel, and the outer side of the bamboo tubes 4 is filled with an intermediate material 6.

[0040] The panel 1 consists of two pieces, and the load-bearing structure is located between the two pieces of the panel 1.

[0041] The bamboo tubes 4 are arranged in a continuous sequence.

[0042] The opposite surfaces of the adjacent bamboo tubes 4 are flattened.

[0043] The panel 1 is selected from any one of solid wood boards, laminated boards, OSB boards, spliced ​​wood boards, spliced ​​bamboo boards, MDF, honeycomb boards, fiberboard, or bamboo-wood composite boards. In this embodiment, the panel 1 is selected from laminated boards, specifically RLT (Rotary-cut Laminated Timber). RLT is a large-format, thick-core orthogonal laminated engineered wood, with a width of up to 3.2 meters, a length of up to 12 meters, and a thickness ranging from 2 cm to 40 cm. Because of its large length and width, RLT can be produced with a high degree of automation on factory assembly lines, allowing for standardized mass production as well as customized production. Moreover, bamboo and wood have a higher load-bearing capacity than concrete and steel, and the enlarged cross-section of bamboo and wood materials provides excellent fire resistance. For example, the burning rate of heavy wood structures is affected by the surface carbonization layer, and is only 0.6 mm to 0.7 mm per minute inward. Furthermore, research shows that CLT has a fire resistance rating of REI90, which means that it can maintain sufficient load-bearing capacity for 90 minutes of burning, while unprotected steel has a REI rating of only 15, and its fire resistance is far inferior to that of CLT and RLT.

[0044] A flame-retardant layer is provided on the outer side of the panel 1. The flame-retardant layer is selected from any one of wood board, bamboo board, wood-bamboo composite board, aerogel material, fire-retardant polyurea, or fireproof board. In this embodiment, the flame-retardant layer is a fireproof board, which can improve the performance and service life of the wall when used as a flame-retardant layer for the exterior wall.

[0045] The intermediate material 6 is a thermal insulation material, or it can be an adhesive, expanding foam, or aerogel. In this embodiment, the intermediate material 6 is expanding foam, which, in addition to providing good bonding strength, also improves the thermal insulation effect of the wall.

[0046] Example 2 See Figures 3-6 This embodiment of a bamboo-wood composite wall differs from Embodiment 1 in that the smaller diameter ends 402 or larger diameter ends 401 of adjacent bamboo tubes 4 face opposite directions. Due to the characteristics of bamboo growth, bamboo is generally shaped with a larger diameter at the root (larger diameter end 401) and a smaller diameter at the top (smaller diameter end 402) (see...). Figure 7 If the bamboo tubes 4 are all arranged in a forward direction, the large-diameter ends of adjacent bamboo tubes 4 will be in contact or close to each other, but the distance between the small-diameter ends 402 will be relatively far. This may cause the small-diameter ends 402 of the bamboo tubes 4 to shift or bend. Due to the special structure of the bamboo tubes 4, if the force direction of the bamboo tubes 4 is perpendicular, its multiple bamboo joints can bear the weight well and distribute the force. However, if the top of the bamboo tubes 4 is offset or bent significantly, it may cause a change in the direction of the force on the bamboo tubes 4. The bamboo joints will not be able to play their role when bearing weight, affecting the load-bearing effect. This utility model makes the small-diameter ends 402 of adjacent bamboo tubes 4 face opposite directions, so that the bamboo tubes 4 are arranged with alternating large-diameter ends 401 and small-diameter ends 402. This reduces the space for the small-diameter ends 402 of the bamboo tubes 4 to shift or bend when bearing weight, improves the load-bearing capacity of the bamboo tubes 4 of this utility model, and makes the arrangement between adjacent bamboo tubes 4 more compact, so that more bamboo tubes 4 can be arranged, increasing the number of bamboo tubes 4. When a large load-bearing capacity is required, the overall load-bearing capacity is increased.

[0047] Everything else is the same as in Example 1, and will not be repeated here.

[0048] Example 3 See Figures 8-9 A bamboo-wood composite wall, unlike embodiment 2, also includes a frame structure. The frame structure includes horizontal beams 2 set on the upper and lower sides of the bamboo tubes 4. In addition to providing a covering function for the upper and lower sides of the composite wall, the horizontal beams 2, as a load-bearing wall, can play a good overall supporting role, distributing the force of the local bamboo tubes 4 and wooden columns 5 to the surrounding bamboo tubes 4 and wooden columns 5, thereby improving the load-bearing capacity of the composite wall.

[0049] The crossbeam 2 is selected from any one of solid wood boards, glued laminated timber, plywood, OSB boards, spliced ​​wood boards, spliced ​​bamboo boards, MDF, fiberboard, or bamboo-wood composite boards. In this embodiment, the frame structure is selected from glued laminated timber, specifically glued laminated timber beams.

[0050] Everything else is the same as in Example 2, and will not be repeated here.

[0051] Example 4 See Figures 10-11A bamboo-wood composite wall, based on embodiment 3, further includes side panels 3 in its frame structure. The side panels 3 are disposed on the left and right sides of the composite wall. The side panels 3 provide coverage to the left and right sides of the composite wall, enhancing its aesthetics, and can also serve as supporting beams, making the composite wall a unified whole, thus creating a skin effect and improving its load-bearing capacity. Furthermore, the side panels 3 and the crossbeams 2 can be connected using mortise and tenon joints, round wooden sticks, or long wood screws to form a frame structure, facilitating connections between adjacent wall panels and floor slabs.

[0052] Everything else is the same as in Example 3, and will not be repeated here.

[0053] Example 5 See Figure 12 A bamboo-wood composite wall, unlike embodiment 4, includes a load-bearing structure further comprising wooden columns 5, which are arranged between the bamboo tubes 4, parallel to the bamboo tubes 4, and alternately arranged.

[0054] The wooden column 5 is made of square timber, round timber, flat timber strips, wood planks, glued laminated timber, or bamboo-wood composite board.

[0055] In this embodiment, the wooden column 5 is glued laminated timber.

[0056] Everything else is the same as in Example 4, and will not be repeated here.

[0057] Example 6 See Figure 13 A bamboo-wood composite wall, which differs from embodiment 5, wherein two or more bamboo tubes 4 are arranged continuously as a load-bearing structure, and a cavity is provided between adjacent load-bearing structures, and the wooden column 5 is located in the cavity of the bamboo tube 4.

[0058] Everything else is the same as in Example 5, and will not be repeated here.

[0059] Example 7 See Figure 15 A bamboo-wood composite wall, which differs from Embodiment 4, has two or more bamboo tubes 4 arranged continuously as a load-bearing structure, with cavities provided between adjacent load-bearing structures.

[0060] Everything else is the same as in Example 4, and will not be repeated here.

[0061] Example 8 See Figure 14A bamboo-wood composite wall, based on embodiment 4, features a window 7 or doorway on panel 1 when used as an exterior wall. In this embodiment, the window 7 on panel 1 is positioned opposite to each other, and the edges of the windows 7 on the two panels 1 are connected by a partition 8, thus forming a window shape on the composite wall. The partition 8 is selected from any one of solid wood boards, glued laminated timber, laminated boards, OSB boards, spliced ​​wood boards, spliced ​​bamboo boards, MDF, fiberboard, or bamboo-wood composite panels. In this embodiment, the partition 8 is selected as laminated timber; specifically, the laminated timber is laminated glued laminated timber.

[0062] Example 9 See Figure 16 A bamboo-wood composite wall, unlike embodiment 1, has two rows of bamboo tubes 4 arranged in a staggered manner, that is, each bamboo tube 4 in one row is placed in the gap of the other row of bamboo tubes 4, so that the arrangement between the two rows of bamboo tubes 4 can be more compact, which improves the load-bearing capacity of the wall and the heat preservation effect.

[0063] Example 10 See Figure 17 A bamboo-wood composite wall, unlike embodiment 4, has two rows of bamboo tubes 4 arranged in an aligned manner. The small diameter ends 402 or large diameter ends 401 of adjacent bamboo tubes 4 in the two rows face opposite directions. Since the small diameter ends 402 or large diameter ends 401 of the bamboo tubes 4 in the same row face opposite directions, when two or more rows of bamboo tubes 4 are arranged, the bamboo tubes 4 can be aligned and the arrangement between the two rows of bamboo tubes 4 can be ensured to be tight. This improves the load-bearing capacity of the wall and the heat insulation effect.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bamboo-wood composite wall system, characterized in that, It includes a panel (1) and a load-bearing structure, the load-bearing structure including multiple bamboo tubes (4) disposed on one side of the panel (1), and the outer side of the bamboo tubes (4) is filled with intermediate material (6). The load-bearing structure also includes wooden columns (5), which are arranged between the bamboo tubes (4) and are parallel to the bamboo tubes (4).

2. The bamboo-wood composite wall according to claim 1, characterized in that, The panel (1) is provided in two pieces, and the load-bearing structure is located between the two panels (1).

3. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The smaller diameter ends of adjacent bamboo tubes (4) face opposite directions.

4. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The bamboo tubes (4) are arranged in a continuous manner.

5. The bamboo-wood composite wall according to claim 1, characterized in that, The wooden pillars (5) are round logs, square logs, flat logs, planks, glued laminated timber, or bamboo-wood composite boards.

6. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The opposite surfaces of the adjacent bamboo tubes (4) are flattened.

7. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, It also includes a frame structure, which includes crossbeams (2).

8. The bamboo-wood composite wall according to claim 7, characterized in that, The frame structure also includes side panels (3).

9. The bamboo-wood composite wall according to claim 8, characterized in that, The panel (1) and the frame structure are selected from any one of solid wood boards, glued laminate, laminated boards, OSB boards, spliced ​​wood boards, spliced ​​bamboo boards, MDF, fiberboard, honeycomb boards, or bamboo-wood composite boards.

10. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The outer side of the panel (1) is provided with a flame-retardant layer.

11. The bamboo-wood composite wall according to claim 10, characterized in that, The flame-retardant layer is selected from any one of wood panels, bamboo panels, bamboo-wood composite panels, aerogel materials, fire-retardant polyurea, or fire-retardant boards.

12. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The intermediate material (6) is an adhesive, foam, or aerogel.

13. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The intermediate material (6) is a thermal insulation material.

14. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The panel (1) is provided with a window (7) or a doorway.

15. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, Two or more bamboo tubes (4) form a support structure, and a cavity is provided between adjacent support structures.

16. The bamboo-wood composite wall according to claim 3, characterized in that, The bamboo tubes (4) are arranged continuously, and the opposite surfaces of adjacent bamboo tubes (4) are flattened.

17. The bamboo-wood composite wall according to claim 1 or 2, characterized in that, The bamboo tube (4) array has two or more rows.

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