The application of glass fiber geogrid composite material can reduce the blockage of relief well. The main measure to reduce deposition is to change the filter into a detachable type. The removable filter is made of foam plastic as filter body. It can be divided into fixed parts and detachable parts. The fixed parts are outer filter, filter screen and well pipe. The removable part is foam plastic filter, which is wrapped with nylon net. The foam plastic filter can be regularly cleaned or replaced to keep the permeable performance of the filter body always good.

It should be noted that the granular filter material in the filter body, and the material with larger particle size should be used as far as possible under the premise of meeting the granular filter criteria. For example, the pressure relief well of Guanyinsi sluice on Jingjiang levee and the Mississippi River in the United States have adopted granular materials with particle sizes of 8mm and 13mm respectively as filter layers, which have been used for many years with good results. Some projects also use geotextile as filter layer. For example, two layers of 350g / m2 geotextile are used as filter layer in relief well of Xinjiang main dike in wuhanyang, and geotextile or nylon mesh with 350g / m2 wrapped in relief well is also used as filter screen in Anhui river levee. Their effect needs to be improved.

With regard to the construction and implementation of the filter body, the fiberglass geogrid filtration system is made up of porous polyurethane foam, thick 50mm, and the diameter of the filter is 280mmPP rigid plastic flower tube, which mainly plays a supporting role for the foam. Outside, 400 nylon net is used to wrap the foam plastics, so that it is tightly attached to the plastic flower tube. In order to prevent the filter body from falling off in the process of placing and pulling. The length of each section of the filter body is 2, and the sections are connected by bolts.

Geogrid can be used for decades in harsh environment. It has high tensile strength, contains carbon black, corrosion resistance and low engineering cost, so it can replace the traditional reinforced materials. Plastic tensile geogrid is a kind of network building material which is made of high-density polypropylene or high-density polyethylene by hot-melt stretching. The outer layer of steel plastic geogrid is wrapped by PVC plastic layer.

Coal mine double resistant geogrid is treated by adding antistatic agent and flame retardant on the basis of common plastic bidirectional geogrid, which is used as the support net of underground mine, such as side protection net and false roof net. This modified plastic has excellent physical and chemical properties, such as aging resistance, high temperature resistance, water resistance, no rust, UV resistance, wear resistance and so on, which determines its service life is longer than that of metal mesh products. The glass fiber geogrid also has its special technology, modified asphalt coating, transverse and longitudinal warp knitted net, also has the overall tensile strength, stability of physical and chemical properties of the special advantages.

Plastic geogrid is a kind of plastic geogrid, which is punched on the extruded polymer plate (the raw material is mostly polypropylene or high-density polyethylene), and then the directional stretching is carried out under the heating condition

The friction effect of plastic geogrid in soil is much greater than that of other reinforced members. At the same time, the grid is mat shaped, which can fully contact with the soil, resulting in greater isolation and reinforcement effect. Therefore, the plastic geogrid is an ideal component of reinforced retaining wall. The use of plastic geogrid to build reinforced retaining wall can reduce the lateral pressure on the wall, greatly reduce the lateral deformation of the wall, and make the whole reinforced retaining wall more stable and beautiful.

The plastic geogrid can not only be used to reinforce the mud and soft soil foundation, but also can be used to reinforce the miscellaneous fill and flushing soil foundation whose bearing capacity and settlement can not meet the requirements of buildings. The bearing capacity of the reinforced soil cushion with plastic geogrid can reach 200-400 kPa, which can fully meet the requirements of general buildings or construction machines for the bearing capacity of underground tombs. When it is used to reinforce soft ground tombs, the plastic geosynthetic reinforced cushion is usually arranged on the surface of the foundation or in the shallow area.