CN211363568U - Bidirectional plastic geogrid - Google Patents

Abstract

The utility model relates to a two-way plastics geogrid, including a plurality of ribs of synchronous suppression, a plurality of nodes and the long strengthening rib of whole width of cloth, between two adjacent nodes of two-way plastics geogrid, all connect through the rib between adjacent node and the strengthening rib and form two-way plastics geogrid single net, every two-way plastics geogrid single net in transversely be provided with a whole width of cloth long strengthening rib at least, the strengthening rib with two-way plastics geogrid vertical perpendicular, two sides of strengthening rib have at least one side to be connected with the rib, the plane projection figure of rib is dumbbell shape, the connecting portion of vertical rib and strengthening rib is the curved surface that caves in along this rib vertical central line bilateral symmetry; and the adjacent two-way plastic geogrid single nets are fixedly connected at the joint through a reinforcing rib. The device can increase the connection strength between the geogrid single meshes.

Description

Bidirectional plastic geogrid

Technical Field

The utility model belongs to the technical field of geotechnique's reinforced material, specifically speaking are two-way plastics geogrids.

Background

The plastic geogrid is a two-dimensional latticed net material which is formed by taking high polymer polymers such as polypropylene, high-density polyethylene and the like as main raw materials and directly stretching the polymers through extrusion or stretching the polymers and then welding the polymers, is generally used for laying in soil, and forms an efficient stress transmitter through the engagement and interlocking action between the grid meshes and the soil body, so that local load can be quickly and effectively transmitted to the soil body with a large area, and the aims of reducing local damage stress and prolonging the service life of engineering are fulfilled.

In the prior art, the product width of the biaxial tension plastic geogrid is below 6.5 meters, the equipment investment for producing the biaxial tension plastic geogrid with the product width not less than 6.5 meters and the vertical and horizontal nominal tensile strength greater than 50KN/m is huge, and in the construction and laying site of the geogrid, the traditional overlapping mode of widening the geogrid is as follows: binding ribs of the geogrid together by using plastic belts at the lap joint of 15-20 cm in the longitudinal direction and 10-15 cm in the transverse direction, and fixing the ribs on the ground by using U-shaped nails every 1.5-2.0 m; the unidirectional stretching plastic geogrids are vertically increased by adopting plastic connecting rods in a cross connection mode, the bidirectional stretching plastic geogrids cannot realize the single-net connection between the bidirectional stretching plastic geogrids due to the fact that the size of the meshes of the bidirectional stretching plastic geogrids is too small, and the defects that the strength of the lap joints is low, the moving stability of the lap joints is poor and the like exist simultaneously when the labor cost is consumed in the field lap joint assembly mode of the existing bidirectional stretching plastic geogrids.

The problem that the traditional geogrid is generally smooth in surface and relatively small in friction force with the ground and slides with the ground is solved, so that the conventional geogrid has water storage and storage capacity and is beneficial to the growth of plants when the geogrid is used for vegetation; meanwhile, the problem of low connection strength between the single nets of the biaxial stretching plastic geogrid in the transverse direction is solved, but the problem of low connection strength between the single nets of the biaxial stretching plastic geogrid in the longitudinal direction still exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a two-way plastics geogrid for solve the defect among the prior art.

The utility model discloses a following technical scheme realizes:

a bidirectional plastic geogrid comprises a plurality of ribs, a plurality of nodes and a whole-width long reinforcing rib which are pressed synchronously, the two adjacent nodes of the bidirectional plastic geogrid and the nodes and the adjacent reinforcing ribs are connected through ribs to form a bidirectional plastic geogrid single net, the plane projection pattern of the ribs is dumbbell-shaped, at least one reinforcing rib with the whole width is arranged in each bidirectional plastic geogrid single net along the transverse direction of the bidirectional plastic geogrid single net, at least one side surface of the two side surfaces of the reinforcing rib is connected with the rib, the connecting part of the rib and the reinforcing rib in the vertical direction is in an inwards concave curved surface shape which is bilaterally symmetrical along the vertical central line of the rib, the ribs in the vertical direction are vertical to the transverse direction, the side face, connected with the ribs, of each reinforcing rib is in a bathtub side face shape, and the adjacent two-way plastic geogrid single nets are fixedly connected through the reinforcing ribs at the connection positions.

In the application, at least one reinforcing rib with the whole width is transversely arranged on each single bidirectional plastic geogrid net, so that the integral rigidity of the plastic geogrids can be further improved, and the vertical connection efficiency and the connection strength between the single plastic geogrid nets are improved; the side surface of the whole long reinforcing rib between two adjacent vertical ribs in the vertical direction of the geogrid is in a bathtub side surface shape, so that the contact surface between the whole long reinforcing rib and the filler can be improved, and the interlocking force and the friction force between the whole long reinforcing rib and the filler are further improved; the connecting parts of the vertical ribs and the whole long reinforcing ribs are in the shape of inwards-concave curved surfaces which are bilaterally symmetrical along the vertical central line of the ribs, and through the transition of the curved surfaces, the tensile strength of the geogrid can be enhanced, and the reinforcing capacity of the bidirectional plastic geogrid to engineering projects is ensured.

Preferably, the bidirectional plastic geogrid is also provided with at least one whole-width long reinforcing rib along the vertical direction of the bidirectional plastic geogrid, and at least one side surface of two side surfaces of the reinforcing rib is connected with the rib.

The whole width of the reinforcing ribs are vertically arranged on the bidirectional plastic geogrid, so that the overall rigidity of the bidirectional plastic geogrid can be further improved, and the overall reinforcing effect of the bidirectional plastic geogrid is further improved.

Preferably, the ribs, nodes or ribs are provided with raised and/or recessed points, respectively, which may constitute numbers, letters, patterns or designs and combinations thereof.

The ribs, the nodes or the whole long reinforcing ribs are respectively provided with convex points and/or concave points, so that the contact area with the soil body can be increased, and the friction force is improved; on the other hand, the ribs, the nodes or the whole long reinforcing ribs have certain water storage capacity, so that the growth of plants is facilitated; the convex points and/or concave points can form numbers, letters, characters, patterns or patterns and combinations thereof, so that the product can be further marked, and the product quality can be effectively traced.

Preferably, still be connected with oblique rib between strengthening rib and the adjacent node and/or between the two adjacent nodes, oblique rib is the acute angle with the rib contained angle of vertical direction, the both ends of oblique rib with the junction of strengthening rib and/or node is the kitchen knife form, just the junction of oblique rib both ends kitchen knife form is hand like the symmetry.

Oblique ribs are connected between the side surface of the whole long reinforcing rib and the node and/or between two adjacent nodes, so that the anisotropy of the stress of the geogrid can be weakened, the stress of the geogrid is approximately uniformly distributed in the circumferential direction of the geogrid, and the bearing capacity of the geogrid is further improved; the joints of the two ends of the oblique ribs and the whole long reinforcing ribs and/or the joints are in a kitchen knife shape, so that the mechanical strength of the joints of the oblique ribs and the joints and/or the reinforcing ribs can be further improved, and the pulling resistance and the friction force between the oblique ribs and the soil body can be improved.

Preferably, the ribs and/or the oblique ribs are twisted.

The ribs and/or the oblique ribs are arranged in a twisted shape, so that the shearing resistance of the ribs and/or the oblique ribs can be improved, and meanwhile, the friction force between the ribs and the soil body can be further increased.

Preferably, the reinforcing ribs are provided with nodes and/or ribs.

The reinforcing ribs are provided with the nodes and/or the ribs, so that the contact area between the reinforcing ribs and the soil body can be increased, and the pulling resistance and the friction force between the reinforcing ribs and the soil body are increased.

Preferably, the reinforcing rib is provided with a through hole and/or a blind hole.

The through holes are formed in the reinforcing ribs, so that friction can be increased, the blind holes are formed in the reinforcing ribs, friction can be improved, and meanwhile, the reinforcing ribs have a certain water storage function and are beneficial to plant growth.

Preferably, the projection pattern of the mesh cavity of the planar single mesh is a rounded triangle, a rounded quadrangle, a rounded pentagon, a rounded hexagon, a rounded octagon, a trilateral, a quadrangle, a pentagon, a hexagon, an octagon, a curved polygon, a racetrack shape or an ellipse, and a combination of the shapes.

According to the actual situation of the reinforced engineering, the bidirectional plastic geogrid with different hole pattern combinations is used for different engineering for reinforcing, and the reinforcement effect of the geogrid can be fully exerted.

Preferably, the fixed connection mode of the bidirectional plastic geogrid single net at the connection position through the reinforcing ribs is U-shaped nail pin connection, welding, inserting connection, riveting, bolt connection, bonding, knitting, sewing, bundling, connection rod penetrating connection or injection molding connection and the combination of the connection modes.

The utility model has the advantages that:

the connecting parts of the vertical ribs and the whole long reinforcing ribs are inwards sunken curved surfaces which are bilaterally symmetrical along the vertical center line of the ribs, and through the transition of the curved surfaces, the tensile strength of the geogrid can be enhanced, and the reinforcing capacity of the bidirectional plastic geogrid to engineering projects is ensured.

The whole-width long reinforcing ribs are arranged, on one hand, the whole rigidity of the bidirectional plastic geogrid can be improved, the bearing capacity of the bidirectional plastic geogrid is increased, on the other hand, the whole-width long reinforcing ribs have enough rigidity and strength, the connection efficiency of the whole-width long reinforcing ribs of the bidirectional plastic geogrid can be improved through connection, and meanwhile, the connection strength between single geogrid nets can also be improved.

And thirdly, due to the arrangement of the oblique ribs of the bidirectional plastic geogrid, the stress distribution of the bidirectional plastic geogrid in the circumferential direction is approximately uniform.

And the ribs and/or the oblique ribs are arranged in a twisted shape, so that the shearing resistance of the ribs and/or the oblique ribs can be improved, and meanwhile, the friction force between the ribs and/or the oblique ribs and the soil body can be further increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention.

Shown in the figure:

1. rib 2, node 3, strengthening rib.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A bi-directional plastic geogrid, as shown in figure 1. The bidirectional plastic geogrid is a planar reticular structure formed by connecting a plurality of ribs, a plurality of nodes and reinforcing ribs with the whole width in a staggered manner, and the plastic material of the bidirectional plastic geogrid is not limited, for example, the plastic material is one of PP, HDPE, PET, PA and the like or the combination of the materials; the mesh shape of the bidirectional plastic geogrid is not limited, the projection graph of the mesh cavity holes of the bidirectional plastic geogrid is a fillet triangle, a fillet quadrangle, a fillet pentagon, a fillet hexagon, a fillet octagon, a trilateral, a quadrangle, a pentagon, a hexagon, an octagon, a curve polygon, a runway shape or an ellipse and the combination of the shapes, wherein the width direction represents the transverse direction of the bidirectional plastic geogrid, and the length direction represents the vertical direction of the plastic geogrid.

Example 1:

a bidirectional plastic geogrid comprises a plurality of ribs 1, a plurality of nodes 2 and a whole-width long reinforcing rib 3 which are pressed synchronously, two adjacent nodes 2 of the bidirectional plastic geogrid and the nodes 2 and the adjacent reinforcing ribs 3 are connected with each other through the ribs 1 to form a bidirectional plastic geogrid single net, the plane projection graph of each rib 1 is dumbbell-shaped, at least one whole-width long reinforcing rib 3 is arranged in each bidirectional plastic geogrid single net along the transverse direction of the rib, at least one side surface of each of two side surfaces of each reinforcing rib 3 is connected with the corresponding rib 1, the connecting parts of the ribs 1 and the corresponding reinforcing ribs 3 in the vertical direction are inwards concave curved surfaces which are bilaterally symmetrical along the vertical central line of the corresponding rib 1, the specific shape of the inwards concave curved surfaces is that the connecting parts of the two sides of the ribs 1 and the corresponding reinforcing ribs 3 are symmetrical along the vertical central line of the corresponding rib 1, and the included angle between the rib 1 and the reinforcing rib 3 is an arc-shaped surface which is concave towards the vertical central line of the rib 1. The rib 1 in the vertical direction is vertical to the transverse direction, the side face connected with the rib 1 is in a bathtub side face shape, and the adjacent two-way plastic geogrid single nets are fixedly connected through the reinforcing ribs 3 at the connecting positions.

The utility model discloses an in implementing, the material of two-way plastics geogrid is PP, and the single net of two-way plastics geogrid is the crisscross planar network structure who links to each other and form of whole width of cloth strengthening rib 3 on a plurality of ribs 1 and a plurality of node 2 and the width direction by synchronous suppression, and quadrangle mesh is enclosed into to adjacent rib 1, node 2 and/or width direction's strengthening rib 3, and is adjacent pass through between the two-way plastics geogrid single net strengthening rib 3 on the width direction uses U type nail bolt connected mode fixed connection. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 is 4: 1.

The utility model discloses an in implementing, the material of two-way plastics geogrid is PET, and the single net of two-way plastics geogrid is the crisscross planar network structure who links to each other and form of whole width's strengthening rib 3 on a plurality of ribs 1 and a plurality of node 2 and the width direction by synchronous suppression, and adjacent rib 1, node 2 and/or width direction's strengthening rib 3 encloses into the triangle-shaped mesh, and is adjacent pass through between the two-way plastics geogrid single net strengthening rib 3 on the width direction uses U type nail plug-in connection mode fixed connection. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 in the width direction is 1.01: 1.

In another embodiment of this embodiment, the bidirectional plastic geogrid is made of HDPE, a single net of the bidirectional plastic geogrid is a planar mesh structure formed by alternately connecting a plurality of synchronously pressed ribs 1, a plurality of nodes 2 and a reinforcing rib 3 with the whole width in the width direction, adjacent ribs 1, nodes 2 and/or reinforcing ribs 3 in the width direction form triangular and quadrilateral combined meshes, and the adjacent bidirectional plastic geogrid single nets are fixedly connected through the reinforcing rib 3 in the width direction in a bolt-nut connection manner. In the embodiment, the ratio of the width of the whole long reinforcing rib 3 to the width of the rib 1 in the width direction is 1.6:1, in the embodiment, an inclined rib 1 forming an acute angle with the length direction is further arranged, two ends of the inclined rib 1 are in a kitchen knife shape at the connection part with the reinforcing rib 3 and/or the node 2, and the kitchen knife-shaped connection parts at the two ends of the inclined rib 1 are in hand symmetry.

In another preferred embodiment of the above embodiment, the oblique rib 1 is twisted; the air outlet direction of the shaping section of the stretching oven is changed, so that the included angle between the air outlet direction and the length direction forms an acute angle, the distortion of the oblique rib 1 is realized, and the distortion degree of the oblique rib 1 is controlled by controlling the air outlet speed of the shaping section.

In another preferred embodiment of the above embodiment, the rib 1 in the longitudinal direction and/or the rib 1 in the width direction are twisted; in the shaping section of the stretching oven, an acting force is given to a stretching plane in the width direction of the bidirectional plastic geogrid, and the direction of the acting force and the included angle in the length direction form an acute angle, so that three-axis stretching is realized, and the ribs 1 in the length direction and/or the ribs 1 in the width direction are twisted; the degree of distortion of the rib 1 in the lengthwise direction and/or the rib 1 in the widthwise direction is controlled by controlling the magnitude of the force.

Another preferred of the above embodiment, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are all in a twisted shape, a force is applied to a stretching plane in the width direction of the bi-directional plastic geogrid, an acute angle is formed between the direction of the force and the included angle in the length direction, three-axis stretching is achieved, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are in a twisted shape, and the twisting degree of rib 1 in the length direction, rib 1 in the width direction and oblique rib is controlled by controlling the magnitude of the force.

In another embodiment of this embodiment, the whole width of the wide reinforcing rib 3 in the width direction is provided with a through hole and a blind hole respectively. Otherwise the same as above;

in another mode of this embodiment, the ribs 1 and the nodes 2 are provided to the widthwise full width reinforcing rib 3. Otherwise the same as above;

in another mode of this embodiment, the whole width of the long reinforcing rib 3, the rib 1 and the node 2 in the width direction are respectively provided with a concave point and a convex point. In the stretching and shaping area, a press roll with concave points and/or convex points is arranged, the bidirectional plastic geogrid is pressed by the press roll of the die, so that the concave points and the convex points are respectively arranged on the whole width reinforcing rib 3 in the width direction, the rib 1 and the node 2, and other modes are the same as the above;

example 2:

the utility model provides a two-way plastics geogrid, includes a plurality of ribs 1 of synchronous suppression, a plurality of nodes 2 and the long strengthening rib 3 of whole width of cloth, a plurality of ribs 1, a plurality of nodes 2 and the long strengthening rib 3 interconnect of whole width of cloth form crisscross plane reticular structure, and concrete connection mode does, all through rib 1 fixed connection between two adjacent nodes 2 of length direction and width direction, also through rib 1 fixed connection between node 2 and the adjacent strengthening rib, rib 1 width unequal, node 2 thickness unequal every two-way plastics geogrid single net the width direction of every two-way plastics geogrid single net at least be provided with two whole long strengthening ribs 3, whole long strengthening rib 3 with two-way plastics geogrid's length direction perpendicular, whole long strengthening rib 3 has at least one side in two sides on geogrid length direction to be connected with rib 1 on length direction, the side surfaces of the whole long reinforcing ribs 3 between two adjacent ribs 1 in the length direction of the geogrid are in a bathtub side surface shape, the connecting parts of the ribs 1 in the length direction and the whole long reinforcing ribs 3 are in an inwards concave curved surface shape which is bilaterally symmetrical along the vertical center line of the ribs, and at least two whole long reinforcing ribs 3 are also arranged in the length direction which is parallel to the bidirectional plastic geogrid. At least one side of two sides of the whole width of the reinforcing ribs 3 in the length direction in the width direction of the geogrid is connected with the ribs 1 in the width direction, and the adjacent two-way plastic geogrid single nets are fixedly connected through the whole width of the reinforcing ribs 3 at the connection positions.

In one embodiment of the present invention, the bidirectional plastic geogrid is made of PP, the single net of the bidirectional plastic geogrid is a planar net structure formed by connecting a plurality of ribs 1 and a plurality of nodes 2 which are pressed synchronously, two reinforcing ribs 3 which are full-width long in the width direction and one reinforcing rib 3 which is long in the length direction in a staggered manner, the two reinforcing ribs 3 which are full-width long in the width direction are located at two ends of the bidirectional geogrid in the length direction, and the reinforcing rib 3 which is full-width long in the length direction is located in the middle of the bidirectional plastic geogrid; and adjacent ribs 1, nodes 2 and/or reinforcing ribs 3 in the width direction form hexagonal meshes in a surrounding manner, and the adjacent bidirectional plastic geogrid single meshes are fixedly connected through the reinforcing ribs 3 in the width direction in a welding connection manner. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 is 5: 1.

In one implementation of the utility model, the material of the bidirectional plastic geogrid is HDPE, the single net of the bidirectional plastic geogrid is a planar net structure formed by connecting a plurality of ribs 1, a plurality of nodes 2, two reinforcing ribs 3 with full width in the width direction and one reinforcing rib 3 in the length direction in a staggered manner, the two reinforcing ribs 3 with full width in the width direction are positioned at two ends of the bidirectional geogrid in the length direction, and the reinforcing rib 3 with full width in the length direction is positioned in the middle of the bidirectional plastic geogrid; and adjacent two-way plastic geogrid single nets are fixedly connected through the reinforcing ribs 3 in the width direction in a riveting connection mode. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 in the width direction is 3: 1.

In another embodiment of this embodiment, the material of the bidirectional plastic geogrid is HDPE, the single net of the bidirectional plastic geogrid is a planar mesh structure formed by connecting a plurality of synchronously pressed ribs 1, a plurality of nodes 2 and two full-width reinforcing ribs 3 in the width direction in a staggered manner, the two full-width reinforcing ribs 3 in the two width directions are respectively arranged at two ends of the bidirectional plastic geogrid single net in the length direction, the adjacent ribs 1, nodes 2 and/or reinforcing ribs 3 in the width direction enclose triangular and octagonal combined meshes, and the adjacent bidirectional plastic geogrid single nets are fixedly connected by the reinforcing ribs 3 in the width direction in a bolt-nut connection manner. In the embodiment, the ratio of the width of the whole long reinforcing rib 3 to the width of the rib 1 in the width direction is 5:1, in the embodiment, an inclined rib 1 forming an acute angle with the length direction is further arranged, two ends of the inclined rib 1 are in a kitchen knife shape at the connection part with the reinforcing rib 3 and/or the node 2, and the kitchen knife-shaped connection parts at the two ends of the inclined rib 1 are in hand symmetry.

In another preferred embodiment of the above embodiment, the oblique rib 1 is twisted; the air outlet direction of the shaping section of the stretching oven is changed, so that the included angle between the air outlet direction and the length direction forms an acute angle, the distortion of the oblique rib 1 is realized, and the distortion degree of the oblique rib 1 is controlled by controlling the air outlet speed of the shaping section.

In another preferred embodiment of the above embodiment, the rib 1 in the longitudinal direction and/or the rib 1 in the width direction are twisted; in the shaping section of the stretching oven, a force is given to a stretching plane of the bidirectional plastic geogrid in the width direction, the direction of the force and the included angle of the rib 1 in the length direction form an acute angle, so that three-axis stretching is realized, and the rib 1 in the length direction and/or the rib 1 in the width direction are twisted; the degree of distortion of the rib 1 in the lengthwise direction and/or the rib 1 in the widthwise direction is controlled by controlling the magnitude of the force.

Another preferred of the above embodiment, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are all in a twisted shape, a force is applied to a stretching plane in the width direction of the bi-directional plastic geogrid, an acute angle is formed between the direction of the force and the included angle in the length direction, three-axis stretching is achieved, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are in a twisted shape, and the twisting degree of rib 1 in the length direction, rib 1 in the width direction and oblique rib is controlled by controlling the magnitude of the force.

In another embodiment of this embodiment, the whole width of the wide reinforcing rib 3 in the width direction is provided with a through hole and a blind hole respectively. Otherwise the same as above;

in another mode of this embodiment, the ribs 1 and the nodes 2 are provided to the widthwise full width reinforcing rib 3. Otherwise the same as above;

in another mode of this embodiment, the width-direction full-width reinforcing rib 3, the rib 1, and the node 2 are respectively provided with a concave point and a convex point. In the stretching and shaping area, a compression roller with pits and/or bumps is arranged, the bidirectional plastic geogrid is compressed by the compression roller of the mold, the pits and the bumps are respectively arranged on the whole width reinforcing rib 3 in the width direction, the rib 1 and the node 2, the pits and the bumps form manufacturer names, registered trademarks and the like, and other modes are the same as the above modes;

example 3:

a bidirectional plastic geogrid comprises a plurality of ribs 1, a plurality of nodes 2 and a whole-width long reinforcing rib 3 which are pressed synchronously, wherein the plurality of ribs 1, the plurality of nodes 2 and the whole-width long reinforcing rib 3 are connected with each other to form a staggered planar reticular structure, two adjacent nodes 2 in the length direction and the width direction are fixedly connected through the ribs 1, the nodes 2 are also fixedly connected with the adjacent reinforcing ribs through the ribs 1, a planar projection graph of each rib 1 is dumbbell-shaped, at least two whole-width long reinforcing ribs 3 are arranged in the width direction of each bidirectional plastic geogrid single net, the whole-width long reinforcing ribs 3 are vertical to the length direction of the bidirectional plastic geogrid, at least one side surface of the whole-width long reinforcing ribs 3 in the length direction of the geogrid is connected with the ribs 1 in the length direction, the side surfaces of the whole long reinforcing ribs 3 between two adjacent ribs 1 in the length direction of the geogrid are in a bathtub side surface shape, the connecting parts of the ribs 1 in the length direction and the whole long reinforcing ribs 3 are in an inwards concave curved surface shape which is bilaterally symmetrical along the vertical center line of the ribs, and at least two whole long reinforcing ribs 3 are also arranged in the length direction which is parallel to the bidirectional plastic geogrid. At least one side of two sides of the whole width of the reinforcing ribs 3 in the length direction in the width direction of the geogrid is connected with the ribs 1 in the width direction, and the adjacent two-way plastic geogrid single nets are fixedly connected through the whole width of the reinforcing ribs 3 at the connection positions.

In one embodiment of the present invention, the bidirectional plastic geogrid is made of PP, the single net of the bidirectional plastic geogrid is a planar net structure formed by connecting a plurality of synchronously pressed ribs 1, a plurality of nodes 2, two reinforcing ribs 3 with the whole width in the width direction and two reinforcing ribs 3 with the whole length in the length direction in a staggered manner, the two reinforcing ribs 3 with the whole width in the width direction are located at two ends of the bidirectional plastic geogrid in the length direction, and two sides of the two reinforcing ribs 3 with the whole width in the length direction are connected with the ribs 1 in the length direction; the two full-width reinforcing ribs 3 in the length direction are respectively positioned at two ends of the single net of the bidirectional plastic geogrid in the width direction, and only one side surface of the two side surfaces of the full-width reinforcing ribs 3 in the length direction in the width direction of the bidirectional plastic geogrid is connected with the rib 1 in the width direction and is symmetrical like a hand; the adjacent ribs 1, the nodes 2 and/or the reinforcing ribs 3 in the width direction form quadrilateral meshes in a surrounding manner, and the adjacent bidirectional plastic geogrid single meshes are fixedly connected through the reinforcing ribs 3 in the length direction and the width direction respectively in a U-shaped nail bolt connection manner. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 is 3.5: 1.

In one implementation of the utility model, the two-way plastic geogrid is made of HDPE, the single net of the two-way plastic geogrid is a planar net structure formed by connecting a plurality of synchronously pressed ribs 1, a plurality of nodes 2, two reinforcing ribs 3 with the whole width in the width direction and two reinforcing ribs 3 with the whole length in the length direction in a staggered manner, the two reinforcing ribs 3 with the whole width in the width direction are positioned at two ends of the two-way plastic geogrid in the length direction, and two sides of the two reinforcing ribs 3 with the whole width in the length direction are connected with the ribs 1 in the length direction; the two full-width reinforcing ribs 3 in the length direction are respectively positioned at two ends of the single net of the bidirectional plastic geogrid in the width direction, and only one side surface of the two side surfaces of the full-width reinforcing ribs 3 in the length direction in the width direction of the bidirectional plastic geogrid is connected with the rib 1 in the width direction and is symmetrical like a hand; the adjacent ribs 1, the nodes 2 and/or the reinforcing ribs 3 in the width direction form quadrilateral meshes in a surrounding manner, and the adjacent bidirectional plastic geogrid single meshes are fixedly connected through the reinforcing ribs 3 in the length direction and the width direction respectively in a U-shaped nail inserting connection mode. In this embodiment, the ratio of the width of the entire long reinforcing rib 3 to the width of the rib 1 in the longitudinal direction is 3.8: 1.

In another embodiment of this embodiment, the material of the bidirectional plastic geogrid is PET, the single net of the bidirectional plastic geogrid is a planar mesh structure formed by alternately connecting a plurality of synchronously pressed ribs 1, a plurality of nodes 2, two reinforcing ribs 3 with the whole width in the width direction and two reinforcing ribs 3 with the whole length in the length direction, the two reinforcing ribs 3 with the whole width in the width direction are located at two ends of the bidirectional plastic geogrid in the length direction, and two lateral surfaces of the two reinforcing ribs 3 with the whole width in the length direction are connected with the ribs 1 in the length direction; the two full-width reinforcing ribs 3 in the length direction are respectively positioned at two ends of the single net of the bidirectional plastic geogrid in the width direction, and only one side surface of the two side surfaces of the full-width reinforcing ribs 3 in the length direction in the width direction of the bidirectional plastic geogrid is connected with the rib 1 in the width direction and is symmetrical like a hand; and adjacent two-way plastic geogrid single meshes are fixedly connected through the reinforcing ribs 3 in the width direction in a bolt-nut connection mode. In the embodiment, the ratio of the width of the whole long reinforcing rib 3 to the width of the rib 1 in the length direction is 2.6:1, in the embodiment, an inclined rib 1 forming an acute angle with the length direction is further arranged, two ends of the inclined rib 1 are in a kitchen knife shape at the connection part with the reinforcing rib 3 and/or the node 2, and the kitchen knife-shaped connection parts at the two ends of the inclined rib 1 are in hand-like symmetry.

In another preferred embodiment of the above embodiment, the oblique rib 1 is twisted; the air outlet direction of the shaping section of the stretching oven is changed, so that the included angle between the air outlet direction and the length direction forms an acute angle, the distortion of the oblique rib 1 is realized, and the distortion degree of the oblique rib 1 is controlled by controlling the air outlet speed of the shaping section.

In another preferred embodiment of the above embodiment, the rib 1 in the longitudinal direction and/or the rib 1 in the width direction are twisted; in the shaping section of the stretching oven, a force is given to a stretching plane of the bidirectional plastic geogrid in the width direction, the direction of the force and the included angle of the rib 1 in the length direction form an acute angle, so that three-axis stretching is realized, and the rib 1 in the length direction and/or the rib 1 in the width direction are twisted; the degree of distortion of the rib 1 in the lengthwise direction and/or the rib 1 in the widthwise direction is controlled by controlling the magnitude of the force.

Another preferred of the above embodiment, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are all in a twisted shape, a force is applied to a stretching plane in the width direction of the bi-directional plastic geogrid, an acute angle is formed between the direction of the force and the included angle in the length direction, three-axis stretching is achieved, rib 1 in the length direction, rib 1 in the width direction and oblique rib 1 are in a twisted shape, and the twisting degree of rib 1 in the length direction, rib 1 in the width direction and oblique rib is controlled by controlling the magnitude of the force.

In another embodiment of this embodiment, the whole width of the wide reinforcing rib 3 in the width direction is provided with a through hole and a blind hole respectively. Otherwise the same as above;

in another mode of this embodiment, the ribs 1 and the nodes 2 are provided to the widthwise full width reinforcing rib 3. Otherwise the same as above;

in another mode of this embodiment, the width-direction full-width reinforcing rib 3, the rib 1, and the node 2 are respectively provided with a concave point and a convex point. In the stretching and shaping area, a compression roller with pits and/or bumps is arranged, the bidirectional plastic geogrid is pressed by the compression roller of the mold, so that the pits and the bumps are arranged on the whole width reinforcing rib 3 in the width direction, the rib 1 and the node 2 respectively, and the pits and the bumps form character information such as manufacturer names, production dates and production teams and groups, so that the product quality can be traced conveniently, and other modes are the same as the modes;

in the above embodiment, a method for manufacturing a bidirectional plastic geogrid comprises:

(1) extruding a polymer plate with specified thickness and width by using thermoplastic plastic particles and additives through an extruder, wherein the temperature of the extruder is controlled to be 100-400 ℃;

the method takes thermoplastic plastic particles such as PP, HDPE or PET as main raw materials, adds a certain proportion of plastic additives, and extrudes a board with approximately equal thickness through an extruder at 165-320 ℃, wherein the board can be single plastic or the combination of two plastics and more than two plastic particles;

(2) manufacturing a plastic pore plate with a widened pore gap in the length direction and/or the width direction, wherein the ratio of the width of the widened pore gap to the width of the pore gap which is not widened is more than or equal to 1.8;

adjusting the hole gaps of the plastic plates in the length direction and/or the width direction to obtain a hole plate with widened hole gaps in the length direction and/or the width direction, wherein the ratio of the width of the widened hole gaps to the width of the hole gaps which are not widened is not less than 1.8 in order to obtain higher connection strength between single meshes of the bidirectional plastic geogrid;

when the ratio of the width of the widened hole gap to the width of the hole gap which is not widened is less than 1.8, the integral rigidity of the geogrid is not obviously improved, and the connection strength between the geogrid single meshes through the reinforcing ribs is low.

(3) Biaxially stretching the plastic hole plate with the widened hole gap in the length direction and the width direction; the stretching temperature is controlled to be 80-380 ℃;

preferably, the biaxial stretching temperature of the bi-directional plastic geogrid made of HDPE is controlled to be 90-130 ℃;

preferably, the biaxial stretching temperature of the bidirectional plastic geogrid made of PP is controlled to be 110-160 ℃;

preferably, the biaxial stretching temperature of the bidirectional plastic geogrid made of PET is controlled to be 240-280 ℃;

or when the body of the biaxial stretching bidirectional plastic geogrid is in a thermal deformation state through heat absorption, applying an external force to the geogrid to realize triaxial stretching, wherein the direction of the external force forms an acute angle with the included angle of the stretching plane in the width direction.

In order to realize the twisted shape of the rib, an external force must be applied to the bidirectional plastic geogrid in a thermal deformation state, and the direction of the external force forms an acute angle with the included angle of a stretching plane in the width direction.

By changing the magnitude and direction of the applied external force, the bidirectional plastic geogrids with ribs and/or oblique ribs with different twisting degrees are obtained.

Preferably, in a product shaping area after biaxial stretching is finished, the triaxial stretching of the plastic geogrid is realized; the twisting of the ribs and/or the oblique ribs of the bidirectional plastic geogrid is realized by controlling the wind speed and changing the direction of the wind power, and the twisting degree of the ribs and/or the oblique ribs can be controlled by controlling the wind speed.

(4) The method for manufacturing the concave and convex points on the upper and lower bottom surfaces of the reinforcing rib with the whole width in the length direction of the edge can be realized by arranging a mold with a certain pattern on a tenter in the width direction and simultaneously manufacturing the concave points and/or convex points on the upper and/or lower bottom surfaces of the reinforcing rib in the length direction when the grating is stretched in the width direction.

Preferably, a die with a certain pattern is arranged on the width direction tenter, so that the automatic production of the lengthwise reinforcing rib pits and/or convex points arranged on the width edges of the bidirectional plastic geogrid can be realized, and different patterns can be changed according to the engineering requirements.

In addition, another preferable method for manufacturing the concave-convex points on the upper and lower bottom surfaces of the whole long reinforcing rib is to manufacture the concave-convex points on the upper and lower bottom surfaces of the whole long reinforcing rib of the bi-directional plastic geogrid by using a specific mold press roll under the thermal deformation state of the bi-directional plastic geogrid subjected to the biaxial stretching or the triaxial stretching.

The biaxial stretching or triaxial stretching bidirectional plastic geogrid is subjected to thermal deformation state, concave points and/or convex points on the upper bottom surface and/or the lower bottom surface of the whole-width long reinforcing rib of the bidirectional plastic geogrid are manufactured through specific mold pressing rollers, the specific mold pressing rollers can manufacture concave points and/or convex points on the upper bottom surface and/or the lower bottom surface of the whole-width long reinforcing rib in the length direction and the width direction of the middle position of the bidirectional plastic geogrid, or a set of laser printing process is added on line, so that the concave points and/or the convex points forming characters and/or patterns are manufactured on line.

In the above embodiment, the fixed connection between the single nets of the bidirectional plastic geogrids may be that the number of the single nets of the grids on the left and right sides of the connection between the single nets of the connected bidirectional plastic geogrids is equal, or that the number of the single nets of the plastic geogrids on the left and right sides of the connection is not equal; the single nets are fixedly connected in a mode of U-shaped nail bolt connection, welding, riveting, inserting, bonding, bolt connection, sewing, nailing or injection molding connection and a combination of the connection modes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (8)

1. A bidirectional plastic geogrid comprises a plurality of ribs, a plurality of nodes and a whole-width long reinforcing rib which are pressed synchronously, it is characterized in that the two adjacent nodes of the bidirectional plastic geogrid and the nodes and the adjacent reinforcing ribs are connected through ribs to form a bidirectional plastic geogrid single net, the plane projection pattern of the ribs is dumbbell-shaped, at least one reinforcing rib with the whole width is arranged in each bidirectional plastic geogrid single net along the transverse direction of the bidirectional plastic geogrid single net, at least one side surface of the two side surfaces of the reinforcing rib is connected with the rib, the connecting part of the rib in the vertical direction and the reinforcing rib is in an inwards concave curved surface shape which is bilaterally symmetrical along the vertical central line of the rib, the rib in the vertical direction is vertical to the transverse direction, the side face of the reinforcing rib connected with the rib is in a bathtub side face shape, and the adjacent two-way plastic geogrid single nets are fixedly connected through the reinforcing rib at the connecting part.

2. The bi-directional plastic geogrid according to claim 1, wherein: the bidirectional plastic geogrid is also at least provided with a whole-width long reinforcing rib along the vertical direction of the bidirectional plastic geogrid, and at least one side surface of two side surfaces of the reinforcing rib is connected with the rib.

3. The bi-directional plastic geogrid according to claim 1 or 2, wherein: the ribs, nodes or reinforcing ribs are respectively provided with convex points and/or concave points, and the convex points and/or concave points can form numbers, letters, characters, patterns or patterns and combinations thereof.

4. The bi-directional plastic geogrid according to claim 1 or 2, wherein: still be connected with the inclined rib between strengthening rib and the adjacent node and/or between the double-phase adjacent node, the inclined rib is the acute angle with the rib contained angle of vertical direction, the both ends of inclined rib with the junction of strengthening rib and/or node is the kitchen knife form, just the junction of inclined rib both ends kitchen knife form is hand like the symmetry.

5. The bi-directional plastic geogrid according to claim 4, wherein: the ribs and/or the oblique ribs are twisted.

6. The bi-directional plastic geogrid according to claim 1 or 2, wherein: the reinforcing ribs are provided with nodes and/or ribs.

7. The bi-directional plastic geogrid according to claim 1 or 2, wherein: and the reinforcing ribs are provided with through holes and/or blind holes.

8. The bi-directional plastic geogrid according to claim 1, wherein: the projection pattern of the grid cavity holes of the single geogrid mesh is fillet trilateral, fillet quadrilateral, fillet pentagonal, fillet hexagonal, fillet octagonal, trilateral, quadrilateral, pentagonal, hexagonal, octagonal, curve polygonal, runway-shaped or oval and the combination of the shapes.

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