WO2015101287A1 - Four-way grid - Google Patents

Abstract

A four-way grid, comprising a plurality of nodes and a plurality of ribs, wherein the nodes and the ribs are connected to form a plurality of rectangular units. Each of the rectangular units comprises four first nodes (11, 12, 13, 14) which are located at four vertexes of a rectangle, and a second node (21) which is located at the point of intersection of diagonal lines of the rectangle, and also comprises first ribs (41, 42, 43, 44) which are located in the directions of the sides of the rectangle and are connected to every two adjacent first nodes of the first nodes (11, 12, 13, 14), third nodes (31, 32, 33, 34) which are located at the midpoints of all of the sides of the rectangle, second ribs (51, 52) which are located on the diagonal lines of the rectangle, and third ribs (61, 62) which pass through the second nodes (21) and are connected to each of the third nodes (31, 32, 33, 34), wherein the thickness of each of the nodes is greater than that of each of the ribs.

Description

Four-way grille Technical field

The present invention relates to a mesh plastic tensile structure, and in particular to a four-way grid.

Background technique

In civil engineering, grids or grids are used as reinforcement and reinforcement materials or grilles or grids as protective and insulation materials for construction work.

At present, there are many kinds of plastic mesh structural materials used as reinforcement materials in civil engineering construction. For example, mesh materials directly formed by extrusion of thermoplastics generally have lower tensile strength and higher elongation. Large, it is difficult to meet the engineering needs; the plastic sheet is punched out of the entire row of square or rectangular holes, the shape of the holes can be in various forms, such as circular, elliptical, square, rectangular, etc., longitudinal and transverse stretching , thereby obtaining a square mesh, rectangular hole shape of the stretched mesh material, the material has the effect of good integrity, high strength and low elongation, and largely meets the requirements of the overall strength of the project; In engineering applications, it is found that the actual load is not only the vertical and horizontal pressure, but the various types of mesh materials mentioned above can only provide reinforcement and support in both the longitudinal and transverse directions, and the support from the oblique load will show The great weakness is that they must transmit and distribute the load through the right-angle shearing action of the nodes, so the nodes are also vulnerable to damage.

At present, the stretched network structure material has at least the following problem: the nodes of the grid are easily damaged, thereby causing the grid to be resistant to the tangential force of the soil layer.

Summary of the invention

The invention provides a four-way grid to solve the problem that the nodes of the existing grid are easily damaged and are not resistant to the tangential force of the soil layer.

To this end, the present invention provides a four-way grid comprising: a plurality of nodes and a plurality of ribs,

The node and the rib are connected to form a plurality of rectangular units,

Each of the rectangular units includes: four first nodes located at four vertices of the rectangle, and a second node located at a diagonal intersection of the rectangle, and the connecting lines of the adjacent two first nodes of the rectangle are rectangular sides Each of the rectangular units further includes: a first rib located in a direction of a side of the rectangle and connecting adjacent two first nodes, located in each side of the rectangle a third node of the point, a second rib on a diagonal of the rectangle, and a third rib passing through the second node and connecting each of the third nodes;

The node includes: the first node, the second node, and the third node;

The rib includes: the first rib, the second rib, and the third rib;

Wherein, the thickness of each of the nodes is greater than the thickness of each of the ribs.

Further, the first node and the second node have the same size and thickness.

Further, an area of the first node and the second node is larger than the third node.

Further, the first node, the second node, and the third node have the same thickness, and sides of each of the rectangles are parallel or perpendicular to a length direction of the four-way grid.

Further, the second rib is twisted, and the rectangular unit has a square shape.

Further, a mounting hole is disposed on the first node and the second node.

Further, an area ratio of the first node to the third node is 2.1:1 to 2.9:1, a top surface of each node is higher than a highest point of a top surface of each rib, and a bottom surface of each node is lower than The lowest point of the bottom surface of each rib.

Further, each of the ribs intersects each of the nodes with an increased thickness of the isolation transition zone, and each of the isolation transition zones is a fan shape, and the isolation transition zone isolates the connection of adjacent ribs. The thickness of the isolation transition zone is greater than the thickness of each of the ribs.

Further, each of the isolated transition regions does not intersect an isolated transition region of an adjacent rib end.

Further, adjacent ones of the isolation transition zones intersect, but each of the ribs does not intersect each other.

Since the thickness of each node is larger than the thickness of each rib, when the grid is buried in the soil layer or the soil, the thickness of each node makes not only a horizontal tensile or fixed structure between the grid and the filler, but also a filler. When the water moves smoothly, not only the ribs generate plane friction, but also the vertical resistance and the plane friction force at each node, thereby increasing the frictional resistance and resistance between the grid and the filler, and offsetting the pull-out of the grid. Pulling the force makes the grille less likely to come out.

Further, the first node and the second node are larger than the third node, so that due to different frictional resistances of the large and small nodes, when the filler has a tendency to slip or settle, the grid is unbalanced, thereby offsetting A small amount of deformation, increasing the stability of the overall grid.

Further, the first node and the second node are provided with mounting holes, and the counterweight or other functional components can be installed. In the reclamation project, the grille can be suspended on the bottom of the water; the three-dimensional grille effect is formed, installed and used. More convenient.

Furthermore, the second rib is twisted, which also significantly increases the frictional resistance between the grid and the filler, and increases the shear resistance of the grid to the filler.

Furthermore, each rib intersects each node with an isolated transition zone of increased thickness, and the isolation transition zone is isolated. Adjacent to the connection of the ribs, it provides a manufacturing guarantee for the increase of the thickness of each node.

DRAWINGS

1 is a schematic structural view of a thermoplastic plastic sheet according to a first embodiment of the present invention before being stretched;

2 is a schematic structural view of a thermoplastic sheet according to a first embodiment of the present invention during a stretching process;

3 is a schematic structural view of a four-way grid formed by stretching a thermoplastic sheet according to a first embodiment of the present invention;

4 is a schematic structural view of a thermoplastic plastic sheet according to a second embodiment of the present invention before being stretched;

Figure 5 is a schematic view showing the structure of a thermoplastic sheet in a stretching process according to a second embodiment of the present invention;

6 is a schematic structural view of a four-way grid formed by stretching a thermoplastic sheet according to a second embodiment of the present invention;

FIG. 7 is a schematic structural view of a transition zone of a four-way grid according to a first embodiment of the present invention.

Description of the reference numerals:

11 first node 12 first node 13 first node 14 first node 21 second node 211 isolation transition zone 31 third node 32 third node 33 third node 34 third node 41 first rib 42 first rib 43 first ribs 44 first ribs 51 second ribs 52 second ribs 61 third ribs 62 third ribs 81 stretching holes

detailed description

In order to more clearly understand the technical features, objects and effects of the present invention, the present invention will be described with reference to the accompanying drawings.

Figures 3 and 6 respectively show two four-way grids. The main difference between the two four-way grids is that the angle of the ribs varies by 45 degrees, that is, the four-way grid unit of Figure 3 is on the plane. After turning the angle of 45 degrees, the four-way grid unit of FIG. 6 is formed, and the four-way grid units of the two different angles are identical or similar in structure, but the actual laying time is different due to the laying direction of the grid. After the four-way grid unit of the angle is connected, it forms a certain position corresponding to the overall length direction or the width direction of the grid. Therefore, the direction or the direction of the tensile force of the two four-way grids of FIGS. 3 and 6 The direction of the force of the filler is different.

As shown in FIGS. 3 and 6, a four-way grid according to an embodiment of the present invention includes: a plurality of nodes and a plurality of ribs,

The node and the rib are connected to form a plurality of rectangular units, the node includes: the first node, the second node, and the third node; the rib includes: the first rib The second rib and the third rib;

Each of the rectangular units includes: four first nodes located at four vertices of the rectangle, and a second node 21 located at a diagonal intersection of the rectangles, the first nodes being the first node 11, respectively, the first node 12. The first node 13 and the first node 14, the number of the second nodes is one;

The connecting lines of the adjacent two first nodes of the rectangle are rectangular sides, and each of the rectangular units further includes: a first rib located in a direction of a side of the rectangle and connecting adjacent two first nodes, and is located in a rectangle a third node at a midpoint of each side, a second rib on a diagonal of the rectangle, and a third rib passing through the second node and connecting each of the third nodes;

The number of the third nodes is four, which are respectively the third node 31, the third node 32, the third node 33, and the third node 34. The number of the first ribs is four, which are respectively the first rib 41. , the first rib 42 , the first rib 43 , the first rib 44 , the length of the first rib is a side length of the rectangle; the number of the second rib is two, respectively the second rib 51 and the The length of the second rib 52 is a diagonal length of the rectangle, and the number of the third rib is two, which are respectively the third rib 61 and the third rib 62, and the length of the third rib is a rectangle The side length; the thickness of each of the nodes is greater than the thickness of each of the ribs.

Since the thickness of each node is larger than the thickness of each rib, when the grid is buried in the soil layer or the soil, the thickness of each node makes not only a horizontal tensile or fixed structure between the grid and the filler, but also a filler. When the water moves smoothly, not only the ribs generate plane friction, but also the vertical resistance and the plane friction force at each node, thereby increasing the frictional resistance and resistance between the grid and the filler, and offsetting the pull-out of the grid. Pulling the force makes the grille less likely to come out.

The shape of the rectangular unit is a square, so that the arrangement of the nodes and the ribs inside the four-way grid is relatively regular and easy to manufacture. Further, the first node 11 and the second node 21 have the same size and thickness, which is convenient for fabrication.

Further, the first node 11 and the second node 21 are larger than the third node 31. That is, the area of the vertex node and the center point node of the rectangle is larger than the area of the midpoint node of each side of the rectangle. The large node (the first node and the second node) is connected to 8 ribs; the small node (third node) is connected to only 4 ribs, the ribs at the large node are in the shape of a meter, and the ribs at the small node In the cross-type, in the practice of reinforced soil, the frictional resistance of the large and small nodes is different. When the filler has a tendency to slip or settle, the grid has an unbalanced force, which offsets some minor deformation and increases the stability of the overall grid. Sex.

Further, the first node, the second node, and the third node have the same thickness, and sides of each of the rectangles are parallel or perpendicular to a length direction of the four-way grid. In Figure 3, the sides of the rectangle are parallel or perpendicular to the length direction of the four-way grid. In Figure 6, the sides of the rectangle are at an angle of 45 degrees to the length of the four-way grid, such that the two of Figures 3 and 6 The direction of the tensile force of the four-way grid is different from the direction of the force of the filler.

Further, the second rib 51 is twisted, which also significantly increases the frictional resistance between the grid and the filler, and increases the shear resistance of the grid to the filler.

Further, the first node and the second node are provided with mounting holes, that is, a mounting hole is arranged on the large node, and a weight or other functional component is installed, and in the reclamation project, the grille can be sunk in the Underwater; forming a three-dimensional grille effect, which is more convenient to install and use.

Further, the first node and the second node are larger than the third node, and the areas of the first node and the second node are the same, and the area of the first node and the third node The ratio is from 2.1:1 to 2.9:1, for example 2.5:1, the top surface of each node is higher than the highest point of the top surface of each rib, and the bottom surface of each node is lower than the lowest point of the bottom surface of each rib. That is to say, from the top, each node protrudes from each rib, and from the bottom, each node also protrudes from each rib, so that the friction between the grid and the filler can be increased from the top and bottom directions. Achieve double anti-slip.

Further, as shown in FIG. 7, each of the ribs intersects each of the nodes with an increased thickness of the isolation transition region 211, each of the isolation transition regions is a fan shape, and the isolation transition region is isolated adjacent to each other. The connection of the ribs, the thickness of the isolation transition zone is greater than the thickness of each of the ribs. At the isolation transition zone 211, the thickness increases abruptly, and the thickness of each isolation transition zone is greater than the thickness of each rib. In the present invention, each of the ribs is a stretched portion of the grid, and the nodes are unstretched or relatively stretched portions belonging to the grid, and at the intersection of each of the ribs and each of the nodes, that is, stretching The portion forms an isolated transition zone with the unstretched portion. The isolated transition zone of the present invention assures the stretching of the ribs while also ensuring the unstretched and node thickness of the joints, coordinating the relationship between the stretched portions and the portions that are not required to be stretched.

Further, each of the isolated transition regions does not intersect an isolated transition region of an adjacent rib end. In this way, it is better to control the nodes without being stretched. Further, adjacent ones of the isolation transition zones intersect, but each of the ribs does not intersect each other. As long as the adjacent ribs do not intersect, the nodes will not be stretched, thus ensuring that the ribs have sufficient stretch.

The invention can be made by the following method:

The thermoplastic sheet having a certain thickness is punched through the elliptical holes, and the holes are formed into a regular octagonal array of holes (shown in FIG. 4), which are longitudinally stretched, stretched in the transverse direction, or simultaneously stretched in the longitudinal direction and the transverse direction. The material of the weakened zone formed between the hole and the hole is stretched, and part of the material of the opposite strengthening zone formed between the plurality of holes can only be partially stretched, thereby finally forming a node. Wherein, the stretching holes 81 of the present invention are elliptical holes, and the holes are arranged to form a regular octagonal hole array, which is longitudinally and laterally stretched, or longitudinally and horizontally stretched, thereby forming Different from the existing plastic stretched network structure material, the thickness of each of the nodes is greater than the thickness of each of the ribs.

The thickness of the thermoplastic sheet used is generally not less than 1 mm, but not more than 20 mm; all elliptical holes on the plate, the length of the short axis of the hole generally ranges from 1 mm to 20 mm, and the hole between any adjacent two rows of holes The spacing should be between 0.1 and 5.0 times the aperture. Considering the magnification relationship of the longitudinal, transverse and oblique stretching processes, an elliptical hole is used, and is arranged at a height of ±45° with the longitudinal direction to satisfy the length of the oblique rib as much as possible. Or close to 1.414 times the length of the longitudinal and transverse ribs, the above-mentioned sheet material is longitudinally stretched to form a web material as shown in FIG. 5; and then subjected to transverse stretching, or simultaneous longitudinal and transverse simultaneous stretching, and the stretching ratio varies depending on the material. Different, such as polypropylene is generally 6.0-10 times, polyethylene is generally 4-8 times, but the stretching ratio in both directions should be basically the same, or the stretching ratio in the longitudinal direction (first in the direction of stretching) Large, there is a certain degree of relaxation rebound during lateral stretching, thereby forming a network structure material having a substantially right-angled triangular structure as shown in FIG.

For the traditional square grid, when it is subjected to the load from the oblique direction, it needs to be transmitted to the ribs in two directions through the nodes at an angle of 90°, and the torque of the node will be large, so the node will be larger. The possibility of tearing; and the mesh material having the approximate right-angled triangle structure of the present invention can be directly transmitted to more than three directions in the longitudinal direction and the 45° angle direction, and the angle is relatively small, and the node tear is not easy to occur. The crack phenomenon is almost close to isotropic. Therefore, its force structure is more reasonable.

The mesh structure material formed by longitudinally transversely stretching the sheet material of the aperture array described in the present invention, or the above-mentioned network structure material similar to the present invention, differs due to different stretching ratios in the longitudinal direction and the transverse direction; In terms of the size and array of the geometrically shaped holes and their holes, the longitudinal and lateral hole spacing variations will also affect the final shape of the meshed multidirectional structural material. Therefore, the network structure material of the present invention includes, but is not limited to, the hole type and the plastic stretched network structure material corresponding to the array as set forth in the present invention.

The product shown in FIG. 3 of the present invention adopts the regular octagonal hole array shown in FIG. 1. The stretching process and principle are the same as or similar to those of the product shown in FIG. 6, and elliptical stretching holes 81 are also used. Only the specific stretching direction or stretching parameters, the hole type parameters are different, for example: the thickness of the thermoplastic sheet is generally not less than 1mm, but not more than 20mm; all the oval holes on the plate, the length and the short axis of the hole are generally in the range of the shaft diameter In the range of 1mm to 20mm, the spacing between the holes of any two adjacent rows of holes should be 0.1-5.0 times of the aperture. Considering the magnification relationship of the longitudinal, transverse and oblique stretching processes, elliptical holes are used, and Arranged at approximately ±90° to satisfy as much as 0.707 times the length of the diagonal ribs equal to or close to the length of the longitudinal and transverse ribs, the sheet is longitudinally stretched to form a web material as shown in Figure 2; , or longitudinal and horizontal simultaneous simultaneous stretching, the stretching ratio varies depending on the material, such as polypropylene is generally 6.0-10 times, polyethylene is generally 4-8 times, but the stretching ratio in both directions should be basically the same ,or The (first stretching direction) is slightly larger stretching ratio, relaxation of a degree of resilience during transverse stretching, thereby forming a network structure of a material having a generally right triangular configuration shown in FIG.

In the present invention, an elliptical array is employed to adjust the longitudinal ribs, the transverse ribs, and the diagonal ribs to produce approximately the same draw ratio during stretching. The invention adopts an elliptical hole and is obliquely distributed, and the problem of the longitudinal transverse direction and the oblique stretching ratio has been solved. According to the above description, the sheet material of the hole array described in the present invention is formed by a longitudinally transversely stretched web structure material, or similar to the above-mentioned web structure material described in the present invention, due to different stretching ratios in the longitudinal direction and the transverse direction. Difference; for a certain geometric shape of the hole and its pore size and array, the longitudinal and lateral hole spacing changes will also affect the final shape of the mesh multi-directional structural material. Therefore, the network structure material of the present invention includes, but is not limited to, the hole type and the plastic stretched network structure material corresponding to the array as set forth in the present invention.

The distortion of the rib of the present invention, the abrupt change in the thickness of the joint, and the absence of stretching, and the setting of the isolation transition zone can all improve the stress performance of the lattice. In the engineering practice of reinforced soil, a structure similar to a three-dimensional structure can be formed between the grid and the filler. When the filler has a tendency to slip, not only the plane friction force but also the vertical direction resistance is generated, thereby increasing the grid and The frictional resistance between the fillers counteracts the pulling force that causes the grille to escape, making the grille less likely to escape, thereby improving the overall force effect of the reinforced soil and improving stability.

The above is only the exemplary embodiments of the present invention and is not intended to limit the scope of the present invention. The components of the present invention can be combined with each other without conflict, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be protected by the present invention. The scope.

Claims (10)

A four-way grid, characterized in that the four-way grid comprises: a plurality of nodes and a plurality of ribs, The node and the rib are connected to form a plurality of rectangular units, Each of the rectangular units includes: four first nodes located at four vertices of the rectangle, and a second node located at a diagonal intersection of the rectangle, and the connecting lines of the adjacent two first nodes of the rectangle are rectangular sides Each of the rectangular units further includes: a first rib located in a direction of a side of the rectangle and connecting adjacent two first nodes, a third node located at a midpoint of each side of the rectangle, and a diagonal line located on the rectangle a second rib above, and a third rib passing through the second node and connecting each of the third nodes; The node includes: the first node, the second node, and the third node; The rib includes: the first rib, the second rib, and the third rib; Wherein, the thickness of each of the nodes is greater than the thickness of each of the ribs. The four-way grid of claim 1 wherein said first node and said second node are the same size and thickness. The four-way grid of claim 2 wherein said first node and said second node have an area greater than said third node. The four-way grid according to claim 3, wherein said first node, said second node and said third node have the same thickness, and said rectangular sides are parallel or perpendicular to said four directions The length direction of the grille. The four-way grid of claim 1 wherein said second rib is twisted and said rectangular unit is square in shape. A four-way grid according to claim 1, wherein said first node and said second node are provided with mounting holes. The four-way grid according to claim 1, wherein an area ratio of the first node to the third node is from 2.1:1 to 2.9:1, and a top surface of each node is higher than each of the ribs. The highest point of the top surface, the bottom of each node is lower than the lowest point of the bottom surface of each rib. The four-way grid according to any one of claims 1 to 7, wherein each of the ribs intersects with each of the nodes to have an isolated transition zone of increased thickness, and each of the isolated transition zones is a fan shape, the isolation transition zone isolating the connection of adjacent each of the ribs, and the thickness of the isolation transition zone is greater than the thickness of each of the ribs. The four-way grid of claim 8 wherein each of said isolated transition regions is not associated with adjacent ribs The isolated transition zones at the ends intersect. The four-way grid of claim 8 wherein adjacent each of said isolated transition zones intersect, but said ribs do not intersect each other.

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