Three-dimensional fiber grid reinforced cement-based bending special-shaped plate and preparation method

Abstract

The invention discloses a three-dimensional fiber grid reinforced cement-based bent special-shaped plate and a preparation method, relates to a bent special-shaped plate and a preparation method, and aims to solve the problems that a three-dimensional fiber grid reinforced cement-based plate can only be used for preparing a flat plate, the shape is limited, and the application of the three-dimensional fiber grid reinforced cement-based plate is limited. The first three-dimensional fiber grid and the second three-dimensional fiber grid are bound and fixedly connected through binding fixing pieces, the base body is installed on the first three-dimensional fiber grid and the second three-dimensional fiber grid, and the first three-dimensional fiber grid and the second three-dimensional fiber grid between the base body protection inner layer and the base body protection outer layer are filled with the concrete base body. Cutting and connecting the three-dimensional fiber grids; manufacturing a construction mold; preparing a cement-based matrix; preparing a matrix protection outer layer; and preparing the matrix and the matrix protection inner layer. The invention belongs to the field of buildings.

Description

Technical Field

[0001] The present invention relates to a bent special-shaped plate and a preparation method thereof, and specifically to a three-dimensional fiber grid reinforced cement-based bent special-shaped plate and a preparation method thereof. The present invention belongs to the field of construction. Background Art

[0002] The three-dimensional fiber grid reinforced cement-based material is a high-performance new material that meets the requirements of building materials such as safety and reliability, light weight and high strength, and green and low carbon. It is one of the building materials with broad application prospects in the field of construction. The three-dimensional fiber grid reinforced cement-based board is even more favored for its excellent bending resistance, tensile resistance and impact resistance. With the in-depth research on the three-dimensional fiber grid reinforced cement-based board and the continuous improvement of the design and application solutions, its application in the field of building decoration has gradually become widespread. With the continuous development of the construction industry, in addition to safety and comfort, people's requirements for personalization and aesthetics of buildings have also gradually increased. Limited by the weaving process, the three-dimensional fiber grid is a planar fabric with a certain stiffness. Therefore, the three-dimensional fiber grid reinforced cement-based board can only be prepared into flat plates and cannot be prepared into special-shaped plates. The shape limitation further restricts the application scenarios and popularization of the three-dimensional fiber grid reinforced cement-based board.

[0003] Therefore, the present invention proposes a horizontal connection method for the three-dimensional fiber grid and uses this type of horizontal connection method to prepare a three-dimensional fiber grid reinforced cement-based special-shaped plate. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the three-dimensional fiber grid reinforced cement-based board can only be prepared into flat plates, with shape limitations, which restricts the application of the three-dimensional fiber grid reinforced cement-based board, and further provides a three-dimensional fiber grid reinforced cement-based bent special-shaped plate and a preparation method thereof.

[0005] The technical solution of the present invention is as follows:

[0006] A three-dimensional fiber grid reinforced cement-based bent special-shaped plate includes a first three-dimensional fiber grid, a second three-dimensional fiber grid, an inner matrix protection layer, an outer matrix protection layer, a matrix and a plurality of binding and fixing parts;

[0007] The first three-dimensional fiber grid and the second three-dimensional fiber grid are fixedly connected by binding and fixing parts, and the matrix is installed on the first three-dimensional fiber grid and the second three-dimensional fiber grid.

[0008] The inner matrix protection layer is installed on the inner side surface where the first three-dimensional fiber grid and the second three-dimensional fiber grid are connected, the outer matrix protection layer is installed on the outer side surface where the first three-dimensional fiber grid and the second three-dimensional fiber grid are connected, and the cement-based matrix is filled in the first three-dimensional fiber grid and the second three-dimensional fiber grid between the inner matrix protection layer and the outer matrix protection layer.

[0009] Furthermore, the first three-dimensional fiber grid includes a first inner fiber network, a first outer fiber network, and a first intermediate connecting core column;

[0010] The first inner fiber network and the first outer fiber network are arranged opposite to each other, and the first inner fiber network and the first outer fiber network are connected by the first intermediate connecting core column.

[0011] Furthermore, the first three-dimensional fiber grid includes a second inner fiber network, a second outer fiber network, and a second intermediate connecting core column;

[0012] The second inner fiber network and the second outer fiber network are arranged opposite to each other, and the second inner fiber network and the second outer fiber network are connected by the second intermediate connecting core column.

[0013] Furthermore, one end of the first inner fiber network and one end of the second inner fiber network are fixedly connected by a plurality of binding fasteners, and one end of the first outer fiber network and one end of the second outer fiber network are fixedly connected by a plurality of binding fasteners.

[0014] Furthermore, both the first intermediate connecting core column and the second intermediate connecting core column are composed of multiple rows of fiber bundles, and each row of fiber bundles is formed by two fiber bundles crossing and shuttling. One side of each row of fiber bundles on the first three-dimensional fiber grid is intertwined with the first inner fiber network, and the other side of each row of fiber bundles on the first three-dimensional fiber grid is intertwined with the first outer fiber network. One side of each row of fiber bundles on the second three-dimensional fiber grid is intertwined with the second inner fiber network, and the other side of each row of fiber bundles on the second three-dimensional fiber grid is intertwined with the second outer fiber network.

[0015] Furthermore, the first inner fiber network, the first outer fiber network, the second inner fiber network, and the second outer fiber network are all net structures formed by the interweaving of warp and weft fibers.

[0016] Furthermore, the inner matrix protection layer, the outer matrix protection layer, and the matrix are all made of cement-based materials.

[0017] A preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate

[0018] Step 1: Cutting and connecting of the three-dimensional fiber grid;

[0019] Step 2: Making a construction mold;

[0020] Step 3: Preparing a cement-based matrix;

[0021] Step 4: Preparation of the outer matrix protection layer;

[0022] Step 5: Preparation of the matrix and the inner matrix protection layer.

[0023] In Step 1, the fiber grid and the core column are impregnated with styrene-acrylic emulsion. The impregnated fiber grid is cut, and the cut fiber grid is spliced. The first inner fiber layer and the second inner fiber layer are tied and fixed by a plurality of tying and fixing members. The first outer fiber layer and the second outer fiber layer are tied and fixed by a plurality of tying and fixing members. The first inner fiber layer and the first outer fiber layer are shuttled and intertwined through the first intermediate connecting core column, and the second inner fiber layer and the second outer fiber layer are shuttled and intertwined through the second intermediate connecting core column to form the connection production of the first three-dimensional fiber grid and the second three-dimensional fiber grid.

[0024] In Step 2, a construction mold is made, and a release agent is applied inside the mold.

[0025] In Step 3, the cement-based material is one of cement mortar, fine concrete, foam concrete, glass fiber reinforced concrete or ultra-high performance concrete.

[0026] In Step 4, when preparing the matrix protection outer layer, a cement-based material with a thickness of 2-4 mm is sprayed into the matrix protection outer layer mold and leveled.

[0027] In Step 5, the first three-dimensional fiber grid and the second three-dimensional fiber grid made in Step 1 are placed on the cement-based material in Step 4, and a cement-based material is sprayed onto the first three-dimensional fiber grid and the second three-dimensional fiber grid to make the cement-based material sprayed inside the first three-dimensional fiber grid and the second three-dimensional fiber grid uniform, and a cement-based material for the matrix protection inner layer is sprayed above to reach the thickness of the matrix protection inner layer and leveled.

[0028] Further, the tying and fixing members in Step 1 are made of steel wire. The distance between adjacent tying and fixing members of the first inner fiber layer and the second inner fiber layer is less than or equal to twice the distance of the warp yarns. The distance between adjacent tying and fixing members of the first outer fiber layer and the second outer fiber layer is less than or equal to twice the distance of the warp yarns.

[0029] The present invention has the following effects compared with the prior art:

[0030] 1. The three-dimensional fiber grid of the present application is a fabric woven from continuous fiber bundles, with its weft and warp yarns intersecting vertically and horizontally. The continuous weaving of the fiber bundles can improve the reinforcement efficiency as a cement-based reinforcement and enhance the load-bearing capacity of the folded plate.

[0031] 2. Limited by its form, the traditional three-dimensional fiber grid is only a planar material and it is difficult to fabricate special-shaped plates. The present invention proposes to use wire binding for transverse connection. On the one hand, after wire binding, there is still a certain degree of freedom at the connection, which can rotate along the connection end. The bent special-shaped plate of the present application can be used to fabricate plates with different folding angles. On the other hand, the discontinuity of the three-dimensional grid at the connection leads to the interruption of force transmission, greatly reducing the bearing capacity of the plate. After using wire binding, the wire can play a role in assisting force transmission, avoiding the interruption of force transmission and improving the bearing capacity of the plate.

[0032] 3. The present application uses a three-dimensional fiber grid as a reinforcement to obtain a lightweight, high-strength, green and environmentally friendly bent special-shaped plate, and the bent special-shaped plate also has sufficient bearing capacity.

[0033] 4. The bent special-shaped plate of the present application meets the material requirements in construction.

[0034] 5. The present application uses wire binding to connect multiple three-dimensional fiber grids, making the connected three-dimensional fiber grids safe, reliable and having a high degree of freedom, overcoming the form limitation of the three-dimensional fiber grid itself, and can be used to fabricate bent special-shaped plates with various shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the front view of the three-dimensional fiber grid;

[0036] Figure 2 is the front view of the 'V'-shaped three-dimensional fiber grid. In the figure, the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 are connected by a plurality of binding fasteners 5;

[0037] Figure 3 is the front view of the 'V'-shaped three-dimensional fiber grid reinforced cement-based bent special-shaped plate;

[0038] Figure 4 is Figure 3 the top view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0040] DETAILED DESCRIPTION OF THE EMBODIMENT 1: Combine Figures 1 - 4Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate of this embodiment includes a first three-dimensional fiber grid 1, a second three-dimensional fiber grid 2, a matrix protection inner layer 3, a matrix protection outer layer 4, a matrix 6, and a plurality of lashing and fixing parts 5;

[0041] The first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 are fixedly connected by lashing and fixing parts 5, and the matrix 6 is installed on the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2.

[0042] The matrix protection inner layer 3 is installed on the inner side surface where the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 are connected, and the matrix protection outer layer 4 is installed on the outer side surface where the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 are connected. The first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 between the matrix protection inner layer 3 and the matrix protection outer layer 4 are filled with a cement-based matrix.

[0043] In this embodiment, the three-dimensional fiber grid is a fabric woven from continuous fiber bundles, and its weft yarns and warp yarns crisscross. The continuous weaving of the fiber bundles can improve its reinforcement efficiency as a cement-based reinforcement, and improve the bearing capacity of the folded plate. Both the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 are grid bodies made of basalt fiber materials. The basalt fiber three-dimensional grid is used as the reinforcement material for the concrete matrix. The warp yarns and weft yarns of the basalt fiber three-dimensional grid crisscross to form upper and lower two surface layers, and the core columns connect the two surface layers to form an integral body.

[0044] Specific embodiment two: Combining Figures 1 - 2 Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate of this embodiment, the first three-dimensional fiber grid 1 includes a first fiber inner layer net, a first fiber outer layer net, and a first intermediate connecting core column;

[0045] The first fiber inner layer net and the first fiber outer layer net are arranged oppositely, and the first fiber inner layer net and the first fiber outer layer net are connected by the first intermediate connecting core column. Other compositions and connection relationships are the same as those in the first specific embodiment.

[0046] Specific embodiment three: Combining Figures 1 - 2 Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate of this embodiment, the first three-dimensional fiber grid 2 includes a second fiber inner layer net, a second fiber outer layer net, and a second intermediate connecting core column;

[0047] The second fiber inner layer net and the second fiber outer layer net are arranged oppositely, and the second fiber inner layer net and the second fiber outer layer net are connected by the second intermediate connecting core column. Other compositions and connection relationships are the same as those in the first specific embodiment.

[0048] Specific embodiment four: Combining Figures 1 - 4Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment, one end of the first inner fiber layer net and one end of the second inner fiber layer net are fixedly connected by a plurality of binding fasteners 5, and one end of the first outer fiber layer net and one end of the second outer fiber layer net are fixedly connected by a plurality of binding fasteners 5. Other compositions and connection relationships are the same as those in the second or third specific embodiment.

[0049] In this embodiment, wire binding is used for transverse connection. On the one hand, after wire binding, there is still a certain degree of freedom at the connection, which can rotate along the connection end and can be used to prepare plates with different folding angles. On the other hand, the discontinuity of the three-dimensional grid at the connection leads to the interruption of force transmission, greatly reducing the bearing capacity of the plate. After using wire binding, the wire can play a role in assisting force transmission, avoiding the interruption of force transmission and improving the bearing capacity of the plate.

[0050] Specific embodiment five: Combining Figures 1 - 4 Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment, both the first intermediate connection core column and the first intermediate connection core column are composed of multiple rows of fiber bundles, and each row of fiber bundles is formed by two fiber bundles crossing and shuttling. On one side of each row of fiber bundles on the first three-dimensional fiber grid 1, it is intertwined with the first inner fiber layer net, and on the other side of each row of fiber bundles on the first three-dimensional fiber grid 1, it is intertwined with the first outer fiber layer net. On one side of each row of fiber bundles on the second three-dimensional fiber grid 2, it is intertwined with the second inner fiber layer net, and on the other side of each row of fiber bundles on the second three-dimensional fiber grid 2, it is intertwined with the second outer fiber layer net. Other compositions and connection relationships are the same as those in the fourth specific embodiment.

[0051] Specific embodiment six: Combining Figures 1 - 3 Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment, the first inner fiber layer net, the first outer fiber layer net, the second inner fiber layer net, and the second outer fiber layer net are all net structures formed by the interweaving of warp and weft fibers. Other compositions and connection relationships are the same as those in the first specific embodiment.

[0052] Specific embodiment seven: Combining Figure 3 Describing this embodiment, a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment, the matrix protection inner layer 3, the matrix protection outer layer 4, and the matrix 6 are all made of cement-based materials. Other compositions and connection relationships are the same as those in the first specific embodiment.

[0053] In this embodiment, the cement-based material is one of cement mortar, fine concrete, foam concrete, glass fiber reinforced concrete, or ultra-high performance concrete. When using a matrix material containing chopped fibers, the fiber content should not be greater than 2%, or it is determined through preliminary tests. The above operations are to ensure that the matrix can smoothly pass through the mesh holes of the three-dimensional fiber grid and fill the entire formwork, avoiding situations such as cavities that are not conducive to use.

[0054] Specific Embodiment VIII: Combined with Figures 1 - 4 This embodiment is described. A preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment

[0055] Step 1: Cutting and connecting the three-dimensional fiber grid;

[0056] Step 2: Making a construction mold;

[0057] Step 3: Preparing the cement-based matrix;

[0058] Step 4: Preparing the matrix protection outer layer 4;

[0059] Step 5: Preparing the matrix 6 and the matrix protection inner layer 3.

[0060] Specific Embodiment IX: Combined with Figures 1 - 4 This embodiment is described. A preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate in this embodiment

[0061] In Step 1, the fiber grid and the core column are impregnated with styrene-acrylic emulsion to make them have a certain stiffness. The impregnated fiber grid is cut, and the cut fiber grid is spliced. The fiber grid is obliquely cut along the cutting surface with scissors or a utility knife to cut the three-dimensional fiber grid. The impregnated fiber grid is spliced. The first fiber inner layer net and the second fiber inner layer net are tied and fixed by a plurality of tying and fixing parts 5. The first fiber outer layer net and the second fiber outer layer net are tied and fixed by a plurality of tying and fixing parts 5. The first fiber inner layer net and the first fiber outer layer net are connected by shuttling and interweaving through the first intermediate connecting core column. The second fiber inner layer net and the second fiber outer layer net are connected by shuttling and interweaving through the second intermediate connecting core column to form the connection production of the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2;

[0062] In Step 2, a construction mold is made, and a release agent is coated on the inner part of the mold;

[0063] In Step 3, the cement-based material is one of cement mortar, fine concrete, foam concrete, glass fiber reinforced concrete or ultra-high performance concrete;

[0064] In Step 4, when preparing the matrix protection outer layer, a cement-based material with a thickness of 2-4 mm is sprayed into the matrix protection outer layer mold and leveled;

[0065] In Step 5, place the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 made in Step 1 on the cement-based material in Step 4, and spray the cement-based material onto the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 to make the cement-based material sprayed inside the first three-dimensional fiber grid 1 and the second three-dimensional fiber grid 2 uniform, and spray the cement-based material for the inner layer of matrix protection above, until the thickness of the inner layer of matrix protection is reached and then perform a smoothing treatment. Other compositions and connection relationships are the same as those in the eighth specific embodiment.

[0066] Tenth specific embodiment: Combining Figures 1 - 4 To illustrate this embodiment, a preparation method of a three-dimensional fiber grid-reinforced cement-based bent special-shaped plate in this embodiment

[0067] In Step 1, the binding fixture 5 is made of wire material, and the distance between adjacent binding fixtures 5 of the first fiber inner layer net and the second fiber inner layer net is less than or equal to twice the distance of the warp yarns, and the distance between adjacent binding fixtures 5 of the first fiber outer layer net and the second fiber outer layer net is less than or equal to twice the distance of the warp yarns. Other compositions and connection relationships are the same as those in the ninth specific embodiment.

[0068] Taking the 'V'-shaped folded plate as an example, this application introduces the three-dimensional fiber grid-reinforced cement-based bent special-shaped plate, but this application includes, but is not limited to, special-shaped plates in the shapes of 'V' and 'W'.

[0069] Note that the above are only the preferred embodiments of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A three-dimensional fiber grid-reinforced cement-based bent special-shaped plate, characterized in that: It includes a first three-dimensional fiber grid (1), a second three-dimensional fiber grid (2), an inner matrix protection layer (3), an outer matrix protection layer (4), a matrix (6) and a plurality of lashing and fixing parts (5); The first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) are connected by lashing and fixing with the lashing and fixing parts (5), and the matrix (6) is installed on the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2). The inner matrix protection layer (3) is installed on the inner side surface where the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) are connected, the outer matrix protection layer (4) is installed on the outer side surface where the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) are connected, and a cement-based matrix is filled in the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) between the inner matrix protection layer (3) and the outer matrix protection layer (4).

2. The three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 1, characterized in that: The first three-dimensional fiber grid (1) includes a first fiber inner layer net, a first fiber outer layer net and a first intermediate connecting core column; The first fiber inner layer net and the first fiber outer layer net are arranged oppositely, and the first fiber inner layer net and the first fiber outer layer net are connected by the first intermediate connecting core column.

3. The three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 1, wherein: The second three-dimensional fiber grid (2) includes a second fiber inner layer net, a second fiber outer layer net and a second intermediate connecting core column; The second fiber inner layer net and the second fiber outer layer net are arranged oppositely, and the second fiber inner layer net and the second fiber outer layer net are connected by the second intermediate connecting core column.

4. The three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 2 or 3, characterized in that: One end of the first fiber inner layer net and one end of the second fiber inner layer net are connected by lashing and fixing with a plurality of lashing and fixing parts (5), and one end of the first fiber outer layer net and one end of the second fiber outer layer net are connected by lashing and fixing with a plurality of lashing and fixing parts (5).

5. The three-dimensional fiber grid-reinforced cement-based bent special-shaped plate according to claim 4, characterized in that: Both the first intermediate connecting core column and the second intermediate connecting core column are composed of multiple rows of fiber bundles, and each row of fiber bundles is formed by two fiber bundles crossing and shuttling. On one side of each row of fiber bundles on the first three-dimensional fiber grid (1), it is intertwined with the first fiber inner layer net, and on the other side of each row of fiber bundles on the first three-dimensional fiber grid (1), it is intertwined with the first fiber outer layer net. On one side of each row of fiber bundles on the second three-dimensional fiber grid (2), it is intertwined with the second fiber inner layer net, and on the other side of each row of fiber bundles on the second three-dimensional fiber grid (2), it is intertwined with the second fiber outer layer net.

6. The three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 5, characterized in that: The first fiber inner layer net, the first fiber outer layer net, the second fiber inner layer net and the second fiber outer layer net are all net structures formed by the interweaving of warp and weft fibers.

7. The three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 1, wherein: The inner matrix protection layer (3), the outer matrix protection layer (4) and the matrix (6) are all made of cement-based materials.

8. The preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to any one of claims 1 to 7, characterized in that: Step 1: Cutting and connecting of the three-dimensional fiber grid; Step 2: Making a construction mold; Step 3: Preparing the cement-based matrix; Step 4: Preparation of the outer matrix protection layer (4); Step 5: Preparation of the matrix (6) and the inner matrix protection layer (3).

9. According to the preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate described in claim 8, characterized in that: In Step 1, the fiber grid and the core column are impregnated with styrene-acrylic emulsion. The impregnated fiber grid is cut, and the cut fiber grid is spliced. The first inner fiber layer and the second inner fiber layer are tied and fixed by a plurality of tying and fixing members (5). The first outer fiber layer and the second outer fiber layer are tied and fixed by a plurality of tying and fixing members (5). The first inner fiber layer and the first outer fiber layer are shuttled and interwoven through the first intermediate connecting core column, and the second inner fiber layer and the second outer fiber layer are shuttled and interwoven through the second intermediate connecting core column to form the connection fabrication of the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2). In Step 2, a construction mold is fabricated, and a release agent is applied to the inner part of the mold. In Step 3, the cement-based material is one of cement mortar, fine concrete, foam concrete, Glass fiber reinforced concrete or ultra-high performance concrete; In Step 4, when preparing the matrix protection outer layer, a cement-based material with a thickness of 2 - 4 mm is sprayed into the matrix protection outer layer mold and leveled. In Step 5, the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) fabricated in Step 1 are placed on the cement-based material in Step 4, and a cement-based material is sprayed onto the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) to make the cement-based material sprayed inside the first three-dimensional fiber grid (1) and the second three-dimensional fiber grid (2) uniform, and a cement-based material for the matrix protection inner layer is sprayed above to reach the thickness of the matrix protection inner layer and leveled.

10. The preparation method of a three-dimensional fiber grid reinforced cement-based bent special-shaped plate according to claim 9, wherein: In Step 1, the tying and fixing member (5) is made of steel wire. The distance between adjacent tying and fixing members (5) of the first inner fiber layer and the second inner fiber layer is less than or equal to twice the distance of the warp yarn, and the distance between adjacent tying and fixing members (5) of the first outer fiber layer and the second outer fiber layer is less than or equal to twice the distance of the warp yarn.

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