1、Principle of spray seeding and grass planting technology with geotextile mat three dimensional

In the early 1980s, the combination of soil and materials for slope protection began to be planted by two-dimensional geogrid or "double net straw straw straw" in foreign countries The composite material of "double pulling net" is combined with grass planting. Since the effect of two-dimensional structure on soil erosion control is not obvious, a three-dimensional net material with good soil erosion control ability, namely eotextile mat three dimensional, has been developed.

The geotextile mat three dimensional, also known as geonet mat, is a three-dimensional structure net made of thermoplastic resin. Its bottom layer is a foundation layer with high modulus, which is generally composed of three to four layers of plane net. It is covered with foamed expanded net and filled with planting soil and grass seeds. It has two functions of erosion prevention and plant growth.

The principle of geotextile mat three dimensional spray planting technology is mainly in two aspects: first, the reinforcement and anchoring of geotextile mat three dimensional can protect the slope from wind and rain before the turf is formed; second, after the turf is grown, the plant root system tangles with geotextile mat three dimensional reinforcement to form an overall module structure with high tensile strength, which can improve the coverage area of the grass and increase the fiber density of the plant root system The high tensile strength of the geotextile mat three dimensional can significantly increase the strength of plant roots.

2、Construction characteristics of spray seeding and grass planting technology with geotextile mat three dimensional

(1) The geotextile mat three dimensional is suitable for the construction of cutting slope, soil slope and strongly weathered bedrock slope with slope ratio less than 1:1.

(2) The backfill in the geotextile mat three dimensional package is generally the clay soil with local materials, which is beneficial to combine with the net and prevent the rain from scouring.

(3) The slope surface on which the geotextile mat three dimensional is laid should be as flat as possible to ensure the close combination of the network and the slope surface, so as to avoid the phenomenon of hollowing in some places, which leads to the failure of grass seeds to land on the ground, and the slope surface after the formation of the platform appears "bald spots".