CN102561297B - Diamond multi-axial plastically-stretched geogrid and method for making same - Google Patents

Abstract

The invention discloses a diamond multi-axial plastically-stretched geogrid and a method for making the same. The geogrid comprises transverse bars and longitudinal bars, which are intersected at joints to form rectangular units. The geogrid is characterized in that short bars are arranged in the rectangular units, each rectangular unit is partitioned by the short bars into shapes of two congruent isosceles trapezoids with coincident upper bottoms, lower bottoms of the trapezoids are coincident to two opposite sides of the rectangular unit respectively, the top ends of the lower bottoms of the trapezoids are coincident to the apexes of the rectangular unit, and slopes of the two trapezoids on the other two opposite sides of the rectangular unit form triangles. The geogrid is made by punching hole units on a plastic plate and stretching. The geogrid is reasonable in stress condition and has sufficient tensile strength and shear resistance strength, foundation stability can be guaranteed, and problems of soil loss, subgrade settlement and the like can be prevented.

Description

Brilliant multiaxis is to plastic tensile geo-grid and manufacture method thereof

Technical field

The present invention relates to a kind of geo-grid and manufacture method thereof, specifically a kind of brilliant multiaxis is to plastic tensile geo-grid and manufacture method thereof.

Background technology

Domestic soil reinforcement or reinforcement material for civil engineering is various in style at present, its functional performance feature, and conforming, each is variant.

Conventional material can be divided into three major types:

One, WARP-KNITTING class: as: polyester fiber or glass fiber process are woven into rectangular mesh structure, then on its surface, apply drying and shaping with organic protection coating.Although this product tensile strength is higher, node strength is lower, and easily slippage, causes rectangular mesh malformation, poor stability.

Two, weldbonding class: as: steel and plastic composite material grid, polypropylene tension belt weldbonding grid etc., this series products is first with composite material, to make after band, more longitudinally, laterally takes and form rectangular mesh structure, Nodes carries out weldbonding (welding) and forms.This product, after welding, easily damages original tensile strength of band, causes overall construction intensity to reduce.

Three, plastic tensile class: as: Unidirectional stretched plastic geogrid, biaxial tension Plastics Geogrids, Three-direction stretching Plastics Geogrids etc.

Above product adopts plastic plate through going out the hole of single row or multiple rows, its hole be shaped as circle, rectangle, ellipse etc., through longitudinally, laterally progressively stretching or synchro-draw, thereby obtain the mesh material of rectangle, square, rounded projections arranged, the grid that this structural meterials forms compared with above-mentioned braiding, welding aspect supporting capacity has good integrity, effect that node strength is high, has fully met the requirement of engineering to bulk strength.

But above-mentioned plastic tensile class grid net form is simple in structure: be subject to force direction less, Unidirectional stretched plastic geogrid longitudinal strength is large, transverse strength is less, and biaxial tension Plastics Geogrids has improved transverse strength, but diagonal intensity still a little less than; Improving loading zone, each has reasonability to dispersing on pressure to Three-direction stretching Plastics Geogrids, although be triangular structure, while forming 60 ° at horizontal direction and with horizontal direction, intensity is maximum, causes product at longitudinal direction remitted its fury.

Therefore the application of the said goods in the fields such as highway, railway, water conservancy projects, also exists the factors of instability, easily causes quality accident.

Summary of the invention

In order to overcome above problem, the invention provides a kind of brilliant multiaxis to plastic tensile geo-grid and manufacture method thereof, this product stress is more reasonable, can guarantee the stability of ground, there is again enough tensions, shear strength, and can prevent soil loss, the problems such as subgrade settlement.

The scheme that the present invention solves its technical problem employing is:

A kind of brilliant multiaxis is to plastic tensile geo-grid, comprise Cross slat rod and longitudinal bar rod, longitudinally bar rod and the handing-over of Cross slat clavus point form the rectangular element repeating along horizontal and vertical array, in described rectangular element, be provided with billet rod, described billet rod is divided into following shape by rectangular element: comprise two trapezoidal, described two trapezoidal upper bases overlap, go to the bottom and overlap with two opposite sides of rectangular element respectively, and the trapezoidal summit of going to the bottom overlaps with rectangular element summit, another two opposite sides of described rectangular element and two trapezoidal kidney-shaped triangularities.

Further, described trapezoidal be isosceles trapezoid.

Further, described two trapezoidal be congruent isosceles trapezoid.

A kind of above-mentioned brilliant multiaxis is to plastic tensile geo-grid production method, comprise the following steps: punching array on plastic plate, described hole array comprises the unit, hole that repeats extension along the horizontal and vertical direction of plastic plate, and described unit, hole comprises that interval is four holes of circumferential annular array uniformly; Between described adjacent holes unit, along plastic plate lateral separation, be that A and fore-and-aft distance are D, both sizes are D=A ± n, wherein n=0.1mm-10mm; Plastic plate after above-mentioned punching is stretched, make finished product.

In said method, described hole is at least one in triangle, circle, ellipse, rectangle, trapezoidal, rhombus.

In said method, described hole is isosceles triangle hole, and tri-angle-holed drift angle is towards array center.

In said method, four described holes are along the horizontal and vertical four direction up and down that is uniformly distributed in.

In said method, during described stretching, the draw ratio in drawing process be 2.5-5 doubly.

Beneficial effect of the present invention shows:

1, brilliant multiaxis, to plastic tensile geo-grid, has the network structure of Special complex, has fully demonstrated the table of grid

Area increases, and strengthens with the affinity that contacts of soil.Product is in the stable mechanical property of 360 ° of directions.

When 2, brilliant multiaxis is embedded in the media such as soil, silt to plastic tensile geo-grid, the transmission that each node of grid and rib band are load provides a series of bearing point and anchor point.Therefore when grid is subject to the active force of medium, it is the rubbing action relying between grid surface and medium that grid can obtain enough large stress by micro-displacement, also by the interlocked between grid and medium, is used for obtaining larger stress.Form thus high efficacy transmission and reaction mechanism, thereby brought into play the reinforcement effects of brilliant multiaxis to plastic tensile geo-grid maximum, also grappling length is reduced to minimum simultaneously.

Accompanying drawing explanation

Fig. 1. structural representation of the present invention;

Fig. 2. the design sketch of plastic plate when the longitudinal array of punch die six times, and array step pitch=A schematic diagram;

Fig. 3. the design sketch of plastic plate when the longitudinal array of punch die six times, and array step pitch=A-n;

Fig. 4. the design sketch of plastic plate when the longitudinal array of punch die six times, and array step pitch=A+n.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is further described.

As shown in Fig. 1, a kind of brilliant multiaxis is to plastic tensile geo-grid, comprise Cross slat rod and longitudinal bar rod, longitudinally bar rod and the handing-over of Cross slat clavus point form the rectangular element repeating along horizontal and vertical array, in described rectangular element, be provided with billet rod, described billet rod is divided into following shape by rectangular element: comprise two congruent isosceles trapezoids, described two trapezoidal upper bases overlap, go to the bottom and overlap with two opposite sides of rectangular element respectively, and the top of going to the bottom of rectangular element overlaps with rectangular element summit, another two opposite sides of described rectangular element and two trapezoidal kidney-shaped triangularities.

Above-mentioned rectangle can be also square for rectangle.

Above-mentioned brilliant multiaxis, to a plastic tensile geo-grid production method, comprises the following steps:

C, on plastic plate with red needle device punching array, described hole array comprises that described unit, hole comprises that interval is four holes of circumferential annular array uniformly along the horizontal and vertical direction of the plastic plate equidistant unit, hole that extends of repeating separately;

D, the plastic plate after the punching of a step is stretched, horizontal and vertically respectively stretch 2.5-5 doubly, make finished product.

Above-mentioned hole can meet need of production shape for triangle, circle, ellipse, rectangle, trapezoidal, rhombus and other arbitrary sections.

Present embodiment adopts isosceles triangle hole, and tri-angle-holed drift angle is towards annular array centre dot, and four holes are along the horizontal and vertical four direction up and down that is uniformly distributed in.

Between described adjacent holes unit, along plastic plate lateral separation, be that A and fore-and-aft distance are D, A and D have three kinds of relations: the first A=D is as shown in Fig. 2, and two kinds of D=A ± n of residue, n=0.1mm-10mm wherein, as shown in Fig. 3-4, wherein Fig. 3 is D=A-n, and Fig. 4 is D=A+n.

During use, use red needle at the plastic plate upper punch array that portals, as shown in Fig. 3-4.Plastic plate after punching stretches to it.

Claims (8)

1. a brilliant multiaxis is to plastic tensile geo-grid, comprise Cross slat rod and longitudinal bar rod, longitudinally bar rod and the handing-over of Cross slat clavus point form the rectangular element repeating along horizontal and vertical array, it is characterized in that: in described rectangular element, be provided with billet rod, described billet rod is divided into following shape by rectangular element: comprise two trapezoidal, described two trapezoidal upper bases overlap, go to the bottom and overlap with two opposite sides of rectangular element respectively, and the trapezoidal summit of going to the bottom overlaps with rectangular element summit, another two opposite sides of described rectangular element and two trapezoidal kidney-shaped triangularities.

2. according to the geo-grid described in claim 1, it is characterized in that: described trapezoidal be isosceles trapezoid.

3. according to the geo-grid described in claim 1 or 2, it is characterized in that: described two trapezoidal be congruent isosceles trapezoid.

4. an above-mentioned brilliant multiaxis is to plastic tensile geo-grid production method, it is characterized in that: comprise the following steps: punching array on plastic plate, described hole array comprises the unit, hole that repeats extension along the horizontal and vertical direction of plastic plate, and described unit, hole comprises that interval is four holes of circumferential annular array uniformly; Between described adjacent holes unit, along plastic plate lateral separation, be that A and fore-and-aft distance are D, both sizes are D=A ± n, wherein n=0.1mm-10mm; Plastic plate after above-mentioned punching is stretched, make finished product.

5. according to the production method described in claim 4, it is characterized in that: described hole is at least one in triangle, circle, ellipse, rectangle, trapezoidal, rhombus.

6. according to the production method described in claim 4, it is characterized in that: described hole is isosceles triangle hole, and tri-angle-holed drift angle is towards array center.

7. according to the production method described in claim 4 or 5 or 6 any one, it is characterized in that: four described holes are along the horizontal and vertical four direction up and down that is uniformly distributed in.

8. according to the production method described in claim 4, it is characterized in that: during described stretching, the draw ratio in drawing process is 2.5-5 times.