CN214005645U

CN214005645U - Multidirectional plastic stretching geogrid

Info

Publication number: CN214005645U
Application number: CN202023064327.5U
Authority: CN
Inventors: 陆诗德; 满续文; 梁训美; 王继法; 李克朋; 徐金龙
Original assignee: Taian Road Engineering Materials Co ltd
Current assignee: Taian Road Engineering Materials Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-20
Anticipated expiration: 2030-12-18

Abstract

The utility model relates to a tensile geogrid of multidirectional plastics, including a plurality of integrative stretch forming's cell cube, the cell cube includes by two horizontal muscle and two vertical bars rectangle frame that forms, is located first node in the rectangle frame, and certainly first node extends to a plurality of side muscle of rectangle frame, and horizontal muscle forms the second node with the junction of vertical bar, and the side muscle forms the third node with the junction of rectangle frame, and two third nodes adjacent with the second node in same cell body are connected through end muscle. The multidirectional plastic stretching geogrid has the net-shaped structure, so that the surface area of the grid is increased, and the anchoring locking force between the grid and the filler is increased; the multidirectional plastic tensile geogrid is balanced in strength in all directions, stable in mechanical property in the 360-degree direction, and capable of uniformly dispersing loads around due to the uniqueness of the unit bodies of the multidirectional plastic tensile geogrid in a structure that the units radiate uniformly from the center to the outside when the multidirectional plastic tensile geogrid is subjected to concentrated loads, so that local load concentration is avoided.

Description

Multidirectional plastic stretching geogrid

Technical Field

The utility model relates to a geotechnical material technical field especially involves the geosynthetic material who is used for geotechnical engineering, civil engineering field, specifically indicates a tensile geogrid of multidirectional plastics.

Background

The plastic stretched geogrid is a main geosynthetic material, has a latticed structure, can anchor and lock soil particles, plays a role in reinforcement or reinforcement, and is commonly used as a rib material of a reinforced soil structure or a rib material of a composite material and the like.

With the continuous development of plastic stretching geogrids, the existing tightening or reinforcing materials with grid structures and using plastics as matrixes are various at home and abroad. Such as the common: unidirectional tensile plastic geogrids, bidirectional tensile plastic geogrids, three-way tensile plastic geogrids and the like. The product is made of plastic plates through plasticizing, extruding, punching and integral stretching, and has the characteristics of good integral type, high node strength and good reinforcement effect. However, there are some problems, such as: the unidirectional tension geogrid has high longitudinal strength and low transverse strength, and is only suitable for single working conditions with determined stress directions; the bidirectional grating can bear loads in the longitudinal direction and the transverse direction, but the strength in the diagonal direction is weak, and the loads must be dispersed by nodes, so the nodes are easy to damage; the three-dimensional grating is in an equilateral triangle structure, and the strength in three directions is improved. However, this type of grid has the greatest strength in the transverse (or longitudinal) direction and at 60 ° to the transverse (or longitudinal) direction, and the strength in the longitudinal direction is correspondingly reduced, so that there is an unstable factor in the load.

Disclosure of Invention

The utility model discloses to prior art not enough, provide a multidirectional tensile geogrid of plastics, this grid is all balanced in strength, can bear multidirectional load, can be with the even effectual dispersion all around of load, have tensile, the ability reinforce that shears, consolidate effectual characteristics.

The utility model discloses a following technical scheme realizes, provides a tensile geogrid of multidirectional plastics, including a plurality of integrative stretch forming's cell cube, the cell cube includes by two horizontal muscle and two vertical bars formation's rectangle frame, is located first node in the rectangle frame, and certainly first node extends to a plurality of side muscle of rectangle frame, and horizontal muscle and the junction of vertical bar form the second node, and the side muscle forms the third node with the junction of rectangle frame, and two third nodes adjacent with the second node in the same cell body are connected through end muscle.

Each cell cube structure of this scheme to first node is the benchmark external radiation and sets up the side muscle, has realized that the multidirectional bears, and through setting up end muscle, messenger's side muscle and end muscle, side muscle and horizontal muscle, side muscle and indulge the muscle, end muscle and horizontal muscle, indulge the muscle and form triangle-shaped respectively, have improved the holistic improvement of grid and have sheared and tensile ability, at the hole check that triangle-shaped department formed, increased and soil between the anchor locking power, improved the reinforcement effect.

Preferably, the rectangular frame is square, and the first node is located in the center of the rectangular frame. The load is dispersed more effectively by the arrangement of the optimized scheme.

As an optimization, the side ribs are uniformly distributed along the circumferential direction of the first node. The setting of this optimization scheme makes the dispersion of load more even.

As optimization, the included angle between adjacent side ribs on the same first node is 45 degrees. Through the setting of this optimization scheme, make every unit internal contain eight side muscle, form and use eight triangle-shaped cells of first node as the center and be located horizontal muscle, indulge four triangle-shaped cells that the muscle junction is inboard and form the dictyosome structure, increased the surface area of net, further increased the anchor locking power between grid and the filler to and the grid is to the shearing resistance of filler.

And as optimization, the thicknesses of the first node, the second node and the third node are the same and are all larger than the thicknesses of the bottom rib and the side ribs. The arrangement of the optimization scheme improves the structural strength of each node, thereby ensuring the integral tensile strength of the grating.

As optimization, the areas of the first node, the second node, and the third node are sequentially reduced. The setting of this optimization scheme is convenient for realize through tensile, has reduced the preparation degree of difficulty, has avoided the material extravagant moreover.

Preferably, the width of the transverse ribs and the width of the longitudinal ribs are both larger than the width of the bottom ribs and the width of the side ribs. The setting of this optimization scheme has guaranteed the tensile and shear strength of grid overall framework, when adjacent cell cube sharing horizontal muscle and vertical muscle, guarantees sufficient bearing load's ability.

And optimally, the unit bodies are arranged in an array mode, the longitudinal ribs of two adjacent unit bodies are overlapped in the transverse direction, and the transverse ribs of two adjacent unit bodies are overlapped in the longitudinal direction. The adjacent two cell bodies of this optimization scheme have simplified the grid structure along horizontal muscle or indulge the muscle, make the wholeness of grid stronger.

As optimization, the bottom ribs, the transverse ribs and the longitudinal ribs form isosceles right triangles, and the number of the isosceles right triangles in the same unit body is four, and the isosceles right triangles are uniformly distributed along the circumferential direction. This optimization scheme's setting makes the inboard of horizontal muscle in every unit body and indulge the muscle junction all form isosceles right triangle, has increased tensile strength.

The scheme also provides a manufacturing method of the multidirectional plastic stretching geogrid, which comprises the following steps:

step one, plasticizing and extruding plastic raw materials to prepare a plate;

secondly, punching a plurality of groups of through holes on the plate manufactured in the first step, wherein the through holes are arranged in an array manner, each group of through holes comprises eight first stretching base holes which are uniformly distributed along the circumferential direction, and two first stretching base holes are arranged on the transverse center line of a circle where each first stretching base hole is located;

the first stretching base holes are isosceles triangles, and the vertexes of the first stretching base holes face the circle center of the circle where each first stretching base hole is located;

four second stretching base holes which are uniformly distributed along the circumferential direction are arranged around the center of a circle where four groups of through holes forming the smallest square are located, and each side of the square formed by the four second stretching base holes is parallel to each side of the smallest square;

step three, longitudinally and transversely stretching the punched plate to form a grid;

and step four, shaping and winding the grids.

The utility model has the advantages that:

1. the multidirectional plastic stretching geogrid has the net-shaped structure, so that the surface area of the grid is increased, the anchoring and locking force between the grid and the filler is increased, and the shearing resistance of the grid to the filler is improved;

2. the multidirectional plastic tensile geogrid is balanced in strength in all directions, stable in mechanical property in the 360-degree direction, and capable of uniformly dispersing loads to the periphery due to the uniqueness of the unit bodies of the multidirectional plastic tensile geogrid in a structure which is uniformly radiated from the center to the outside when the multidirectional plastic tensile geogrid is subjected to concentrated loads, so that local load concentration is avoided;

3. when the grid is buried in soil, silt and other media, each node of the grid, the side ribs and the bottom ribs provide a series of bearing points and anchoring points for load transfer, so that when the grid is under the action of the media, the grid can obtain enough stress through small displacement, the enough stress is obtained through the friction action between the surface of the grid and the media, and the larger stress is obtained through the interlocking action between the grid and the media, so that an efficient stress transfer and reaction mechanism is formed, the maximum reinforcement effect of the stretched geogrid is exerted, and the anchoring length is reduced to the minimum.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the unit body of the present invention;

FIG. 3 is a schematic diagram illustrating the distribution of punching holes in the manufacturing method of the present invention;

shown in the figure:

1. the longitudinal rib, 2, the bottom rib, 3, the side rib, 4, the first node, 5, the second node, 6, the third node, 7, the transverse rib, 8, the first stretching base hole, 9, the second stretching base hole.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in fig. 1, the multidirectional plastic stretching geogrid comprises a plurality of unit bodies which are integrally stretched and formed, and the unit bodies are arranged in an array. As shown in fig. 2, the cell cube includes by two horizontal muscle 7 and two vertical muscle 1 rectangular frame that form, is located first node 4 in the rectangular frame, and certainly first node extends to a plurality of side muscle 3 of rectangular frame, and horizontal muscle 7 forms second node 5 with vertical muscle 1's junction, and side muscle 3 forms third node 6 with the junction of rectangular frame, and two adjacent third nodes of second node are connected through end muscle 2 in the same cell body.

The rectangular frame of this embodiment is the square, and first node is located the center of rectangular frame, and the side muscle is along the circumference evenly distributed of first node, and the contained angle alpha between the adjacent side muscle on same first node is 45, and the quantity of the internal side muscle of every unit is eight, forms eight radiation radiuses of regular octagon. The bottom ribs, the transverse ribs and the longitudinal ribs form isosceles right triangles, and the number of the isosceles right triangles in the same unit body is four, and the isosceles right triangles are uniformly distributed along the circumferential direction.

The thickness of first node, second node and third node is the same, and all is greater than the thickness of end muscle and side muscle, and the area of first node, second node and third node reduces in proper order.

The width of horizontal muscle and indulging the muscle all is greater than the width of end muscle and side muscle, and on the array transverse direction, the muscle coincidence is indulged to two adjacent cell cube, and on the longitudinal direction, the horizontal muscle coincidence of two adjacent cell cube. Horizontal muscle, vertical muscle, side muscle and end muscle are formed by stretching, and the shape is middle narrow, both ends are wide, and the internal side muscle of every unit all can form regular dodecagon with the internal side muscle of other units.

The method for manufacturing the multidirectional plastic stretched geogrid comprises the following steps:

firstly, plasticizing and extruding plastic raw materials, and then manufacturing the plastic raw materials into a plate through a five-roller calender;

and step two, punching a plurality of groups of through holes on the plate manufactured in the step one, wherein the through holes are arranged in an array mode, and the transverse distance and the longitudinal distance of the distribution circle center of each group of through holes are A, namely the transverse distance and the longitudinal distance are equal. Each group of through holes comprises eight first stretching base holes 8 which are uniformly distributed along the circumferential direction, and two first stretching base holes are arranged on the transverse center line of the circle where each first stretching base hole is located. The first stretching base hole is one of an isosceles triangle, a circle, an ellipse, a trapezoid, a rhombus and a rectangle; the first stretching base holes of the embodiment are isosceles triangles, and the vertexes of the first stretching base holes face the center of a circle where each first stretching base hole is located;

four second stretching base holes 9 which are uniformly distributed along the circumferential direction are arranged around the center of a circle where four groups of through holes which are adjacent along the circumferential direction, namely four groups of through holes which form the smallest square, and each side of the square formed by the four second stretching base holes is respectively parallel to each side of the smallest square;

step three, longitudinally and transversely stretching the punched plate to form a grid, wherein the stretching speed of each hole is 2-8 times;

and step four, shaping and winding the grids.

In the use, when the grid is buried in media such as soil, silt, each node of grid and rib strip provide a series of bearing point and anchor point for the transmission of load. Therefore, when the grating is acted by the medium, the grating can obtain enough stress through small displacement by means of the friction between the grating surface and the medium and the interlocking between the grating and the medium. Therefore, an efficient stress transfer and reaction mechanism is formed, the maximum reinforcement effect of the tensile geogrid is exerted, and the anchoring length is reduced to the minimum.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims

1. A multidirectional plastic stretching geogrid is characterized in that: including a plurality of integrative stretch forming's cell cube, the cell cube includes by two horizontal muscle (7) and two indulge the rectangle frame that muscle (1) formed, be located first node (4) in the rectangle frame, and certainly first node extends to a plurality of side muscle (3) of rectangle frame, and horizontal muscle (7) and the junction of indulging muscle (1) form second node (5), and side muscle (3) form third node (6) with the junction of rectangle frame, and two third nodes adjacent with the second node in same cell body are connected through end muscle (2).

2. A multidirectional plastic tensile geogrid according to claim 1, wherein: the rectangular frame is square, and the first node is located in the center of the rectangular frame.

3. A multidirectional plastic tensile geogrid according to claim 1, wherein: the side ribs are uniformly distributed along the circumferential direction of the first node.

4. A multidirectional plastic tensile geogrid according to claim 3, wherein: and the included angle between the adjacent side ribs on the same first node is 45 degrees.

5. A multidirectional plastic tensile geogrid according to claim 1, wherein: the thickness of first node, second node and third node is the same, and all is greater than the thickness of end muscle and side muscle.

6. A multidirectional plastic tensile geogrid according to claim 5, wherein: the areas of the first node, the second node and the third node are reduced in sequence.

7. A multidirectional plastic tensile geogrid according to claim 1, wherein: the width of the transverse ribs and the width of the longitudinal ribs are both larger than the width of the bottom ribs and the width of the side ribs.

8. A multidirectional plastic tensile geogrid according to claim 1, wherein: each unit body is arranged in an array mode, in the transverse direction, the longitudinal ribs of two adjacent unit bodies are overlapped, and in the longitudinal direction, the transverse ribs of two adjacent unit bodies are overlapped.

9. A multidirectional plastic tensile geogrid according to claim 1, wherein: the bottom ribs, the transverse ribs and the longitudinal ribs form isosceles right triangles, and the number of the isosceles right triangles in the same unit body is four, and the isosceles right triangles are uniformly distributed along the circumferential direction.