In the land and soil rehabilitation project, the geotechnical decomposition data such as geomembrane, waterproof blanket, geotextile and geogrid are widely used. Geomembrane, also known as impervious membrane, plays a key role in anti-seepage and isolation in the main anti-seepage system. Of course, the environmental protection decomposition materials used with geomembrane include bentonite waterproof blanket, geotextile and geogrid. Geomembrane has the characteristics of high tensile strength, high elongation at break, high right angle tear strength, long water vapor permeability coefficient, low temperature impact embrittlement, high puncture resistance, UV resistance, anti-aging and excellent dimensional stability.

China's rural and urban areas are facing very serious land purification achievements. Since the 1960s, especially in the period of reform and opening up, the state has made great efforts to develop industries in the cities and the countryside, such as the establishment of some high purification companies. In those years, factories were mainly concentrated around the city. Nowadays, these old companies have no environmental protection equipment, so the situation of land and soil purification is very serious. The pollutants and rainwater infiltrate into the soil layer to form the leachate. If it is serious, it will enter the upper and lower water to purify the underground water source. At the same time, the discharged heavy metals will seriously purify the surrounding land and soil, posing a threat to people's health. With the development of ancient cities, most factories stopped moving, leaving a large area of purified land, which not only affects the re development and application of soil, but also destroys the purification of groundwater. Therefore, geomembrane is a kind of special invalid anti-seepage and environmental protection geotechnical data, which is widely used in soil remediation projects. The geomembrane should be used as the main body of anti-seepage and isolation to isolate the contact between harmless purification substances and groundwater, whether biological, chemical treatment or thermal restoration are adopted.