With the rapid growth of China's economy, the rapid expansion of urban population and the rapid growth of the number of motor vehicles, the original municipal roads can hardly meet the needs of traffic, and major cities in China have chosen to build subway projects to enhance the image of the city and investment environment. In addition, there is also a high enthusiasm for the construction of cross-sea river crossings, and the tunnel shield construction method is widely used in engineering construction.

　　There are earth pressure balanced shield and mud and water balanced shield for shield construction. Among them, the mud-water balance shield is filled with mud in the pressure chamber to balance the mud pressure with the soil pressure and water pressure on the excavation surface by adjusting the mud pressure. The mud plays two important roles: firstly, the mud pressure forms a mud film or infiltration area on the excavation surface, which increases the strength of the excavation surface, and at the same time, the mud pressure balances the soil pressure and water pressure on the excavation surface to achieve the purpose of stabilizing the excavation surface; secondly, the mud, as a transport medium, is responsible for transporting all the excavated soil and sand to the outside of the working well, and the slag is discharged through the lower part of the pressure chamber. This time the mud waste slurry needs to be treated by large mud treatment equipment, generally using centrifugal machine processing, the need to use anionic polyacrylamide, the specific choice of which agent, according to the site mud to do model selection experiments to determine.

　　The mud-water separation treatment of tunnel shield mud is generally treated by anion, and the flocculant required will be somewhat different due to different geological conditions of shield tunneling, which needs to be selected through selection experiments. The flocculant treatment effect is mainly depends on the coincidence of the problem, lies in the selection of accurate or not, which is closely related to the size of the selection range, the wider the range, the more models, it is more likely to choose the right model. Guangdong Shouxin Environmental Protection Materials Technology Co., Ltd. is a global polyacrylamide brand with stable quality, after more than ten years of development Shouxin brand polyacrylamide has two obvious advantages:

　　1. More models of polyacrylamide: there are 107 different models of polyacrylamide, which can provide customers with accurate selection experiments and select the more cost-effective polyacrylamide models for customers.

　　2. Stability of polyacrylamide products: We can ensure the stability of the products through professional technical engineers and advanced testing equipment, and do strict double supervision and testing when entering the warehouse and shipping.