CN201722587U - Novel high-strength geogrid - Google Patents

Abstract

The utility model relates to a high-strength geogrid, which is formed by longitudinally and transversally weaving high-strength high-modulus polyvinyl chloride polymer, so as to reinforce the tensile strength of reinforcement strips. A modified rubber coating layer is cladded on the outer layer of the grid, anti-aging agent, antioxidant and light shielding agent and other parent materials are mixed in the rubber, so as to reinforce the creep resistance and the corrosion resistance of the reinforcement strips; circular embossed threads are arranged on the surface layers of the longitudinal and transverse reinforcement strips of the grid, so as to increase the frictional force with mud; meshes of the grid are circular to reduce stress concentration and reinforce the extensibility of the reinforcement strips; bilateral reinforced columns are arranged at node points of the grid reinforcement strips, so as to stop the sliding between soil body and the grid, reinforce the shear resistance of a road bed, balance the settlement and prevent the grid from being pulled out of the road bed. The high-strength geogrid has the advantages of large polymer material strength, small creep deformation due to modified rubber coated outside, high tensile strength and low stretching strain performance; and a special composite reinforcing structure is formed because the circular meshes, the reinforcement strip threads and the reinforcing columns are fully meshed with the soil body, therefore the overall anti-shear strength and the balanced settlement performance of the road bed are improved.

Description

A kind of novel high-strength geo-grid

Technical field

The utility model relates to a kind of highway subgrade intensity that can make to be increased, and makes the geo-grid and the using method thereof of the balanced sedimentation of roadbed, belongs to technical field of civil engineering.

Background technology

In highway subgrade, side slope protection, dam construction are built, often adopt the method for adding geosynthetics in the soil body, commonly used as geo-grid.By the embedding anchoring of grid and soil block and the frictional force between the grid and the soil body, strengthen the intensity of the soil body and reach the purpose of balanced sedimentation, especially in highway subgrade, be used widely.High-strength polymer also is furnished with in length and breadth that the geo-grid of muscle and pore structure is applied in the civil engineerings such as road and rail roadbed, slope seepage control landslide, river levee shore protection, has increased the engineering life-span.Geo-grid can be divided into plastic grill and fabric grid at present.The plastics geo-grid, technology is simpler, and is cheap, but long-time use can show serious creep, causes the degeneration of structural stability.The fabric geo-grid, performance is good, and creep-resistant property is strong, but technology is loaded down with trivial details, involves great expense.The subject matter that present geo-grid is used for highway subgrade is: the grid of horizontal arrangement, easily in the flat motion of water in soil, can not play effective reinforcement effect to the soil body, after the long-time operation of highway, be not that grid broken be exactly that grid is drawn out roadbed, thereby cause side slope protection that secondary destruction is taken place.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes the problem that exists in the existing geo-grid technology, and a kind of high-strength earth work grille net is provided, and should prevent that grid from being broken, and prevents that again grid is drawn out roadbed.

Technical solution of the present utility model is characterized in that, grid is worked out in length and breadth by the high-strength and high-modulus polyvinyl chloride polymer, with the tensile strength of strength bar band; The grid skin is surrounded by the modified rubber coating, is mixed with masterbatch such as age resister, antioxidant and photomask agent in the rubber, with the creep resistance and the corrosion resistance of strength bar band; There is round embossing screw thread on the vertical horizontal bar band top layer of grid, with the frictional force of increase with earth; The grid mesh is circular, concentrates strength bar band extensibility to reduce stress; There is bilateral " reinforcing prop " at grid muscle band node place, and one-sided length forms netted composite construction with the soil body about 3cm, slides to stop between the soil body and grid, strengthens the roadbed shear behavior, and balanced sedimentation prevents that grid is drawn out roadbed.

Using method of the present utility model: (1) spreads loose earth to the embankment surface, and compacted depth is controlled at 30～50cm; (2) after the compacting, to be somebody's turn to do " reinforcing prop " geo-grid spreads to the embankment surface along the direction vertical with direction of traffic, curb leaves and is not less than 2m length grid, be used for anti-package, lap length that grid follows the car direction when laying otherwise, " reinforcing prop " dislocation lap joint is enclosed within grid circular net intraocular less than 20cm; (3) manually grid is strained in length and breadth, and " reinforcing prop " is knocked in the compacted soil, re-lay second layer soil, and roll with rubber hammer, at this moment " reinforcing prop ", grid mesh with the abundant interlock of the soil body; (4) with embankment both sides grid anti-package to curb, with new laying grid overlap joint, and will " reinforcing prop " misplace and be enclosed within the grid, with rubber hammer " reinforcing prop " knocked in compacted soil, re-lay the 3rd layer of soil.

The utility model advantage: (1) high-strength and high-modulus polyvinyl chloride polymer strength of materials is big, and skin scribbles modified rubber, and creep is little, and the performance of high tensile, low tensile strain is arranged; (2) the circular mesh of grid, having reduced stress concentrates, the grid muscle has round embossing screw thread, improved frictional force with the soil body, node place " reinforcing prop " embeds the soil body, has stoped the slip between the grid and the soil body, and circular mesh, muscle is threaded and " reinforcing prop " and the abundant interlock of the soil body, form the compound reinforcement in space, improved the integral anti-shearing intensity of roadbed and the performance of balanced sedimentation; (3) grid lap-joint can utilize " reinforcing prop " to be inserted in the grid intraocular, does not re-use the iron wire binding, thus the situation of having avoided grid easily to be bitten broken by iron wire; (4) low price of existing plastic grill has the high-performance of fabric grid again, and construction is simple, and is workable.

The utility model is suitable for highway embankment, slope project, foundation engineering isolith geotechnique journey field.

Description of drawings

Fig. 1 is a kind of plan view of novel high-strength geo-grid.Among the figure: the circular mesh of 1 grid, 2 grid reinforcing props, 3 round embossing screw threads.

Fig. 2 is the A-A sectional view of this utility model grille plane figure.Among the figure: 2 grid reinforcing props.

Fig. 3 is the drawing of 3 round embossing screw threads among this utility model grille plane figure.Among the figure: 2 grid reinforcing props.

Fig. 4 is that this utility model grid is used to reinforce the schematic diagram of highway subgrade.Among the figure: 4 " reinforcing prop " geo-grid.

The specific embodiment

Embodiment: (1) is laid on this utility model geo-grid on the embankment after original ground is laid the thick compacted soil of 30cm, and the super shop of curb 2～3m is used for back bag; (2) follow that lap length is 20～30cm between car direction grid, reinforcing prop 2 is inserted in the grid mesh 1, play the purpose of mutual build-in; (3) edge is in length and breadth to the tension grid, with rubber hammer reinforcing prop is knocked in the compacted soil earlier and fixed, will loosen the soil is laid on the grid again, after having rolled, the part of the super shop of first floor grid oppositely returned wrap the curb position, and knock in the compacted soil reinforcing prop fixing with rubber hammer; (4) second layer grid is layered on the compacted soil, the super shop of curb 2～3m, and return after the bag grid overlaps mutually with curb, knock in the compacted soil reinforcing prop fixing with rubber hammer; (5) will loosen the soil again and be laid on the grid, by (3) with (4) one step process compacting soil body, lay grid; (6) roadbed such as the Fig. 3 after reinforcing can lay planting soil in the both sides side slope, the linked network grass-seed of sowing grass seeds by duster, and the greening side slope, the reinforcing prop on the side slope can play the effect of solid native linked network.

Claims (1)

1. novel high-strength geo-grid, it is characterized in that, grid is worked out in length and breadth by the high-strength and high-modulus polyvinyl chloride polymer, the grid skin is surrounded by the modified rubber coating, grid mesh (1) is circular, there is bilateral reinforcing prop (2) at grid muscle band node place, and one-sided length is 3cm, and there is round embossing screw thread (3) on the vertical horizontal bar band top layer of grid.

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