Composite manhole covers are usually made of comprehensive materials, of which fiber reinforced materials are the most widely used and the largest number. Fiber reinforced materials are characterized by small specific gravity, specific strength and high specific modulus. For example, there are carbon fiber and epoxy resin composites, whose specific strength and specific modulus are several times greater than those of steel and aluminum alloy, and also have excellent chemical year stability, antifriction and wear resistance, self lubrication, heat resistance, fatigue resistance, creep resistance, noise elimination, electrical insulation and other properties. Graphical design and resin composite can get almost the same range coefficient as materials. Another feature of fiber reinforced materials is anisotropy, so the arrangement of fibers can be designed according to the strength of different parts of the parts. The aluminum matrix composite reinforced with carbon fiber and silicon carbide fiber can still maintain sufficient strength and modulus at 500 ℃.

The composite well cover material has an elastic molding process, and is characterized by strong plasticity and designability based on the structure of the material. Usually, the composite manhole cover is customized with a mold, and various building blocks are manufactured with one stroke molding method, which can improve the strength of the structure. The performance of different parts of the component can be improved through the design of different fabric arrangement of fiber class. By adjusting the condiments, compositions and agreements of each group of composite materials, the components can not only withstand different performances of one power at different locations, but also can be made into multi-functional products of composite materials with contradictory properties such as rigidity, toughness and plasticity. The corrosion hazard is more obvious in underground environments where such simple and classic materials do not have obvious sea climate, In addition, stray current corrosion of subway project greatly reduces the service life of metal materials. Virtue of human beings. In the application technology of integrated material evacuation platform and supporting cable users, the "designability" of integrated material performance plays a very good role. However, the corrosion resistance of the original metal materials has always been difficult to solve better, such as multiple metals supporting wires, components corroded by wet environment, acid rain, salt spray, etc.