At the southeastern front of the Shanghai Estuary, there are multiple layers of soft soil layers with large thickness in the shallow sediments. Due to the characteristics of low soil strength and high groundwater level, many underground engineering projects need to use foundation pit enclosures. The commonly used enclosures include several main types such as composite soil nailing walls, mixing pile gravity dams, and slab support systems. These enclosures generally require the use of cement-soil mixing pile structures to prevent water or retain soil. The cement-soil mixing pile uses a mixer to forcibly mix cement and soil to form a continuously overlapped cement-soil column plus solid.

Cement is the most important building material for mixing piles. However, the cement industry is also an industry with great pollution and high energy consumption. Developing alternative cement products is an important way to reduce energy consumption in the cement industry and strengthen environmental protection; Due to the late start and other reasons, the domestic research on soil hardener technology is still far behind that of developed countries. The research on hardener technology is not mature enough in theory or practice, causing many research to stagnate in the laboratory. At the stage, it has not been transformed into productivity in time; Baosteel Group, as the leader of national steel companies, produces a large number of industrial by-products in production and manufacturing every year. These by-products are currently mature and used in concrete materials instead of cement. These industrial wastes are mainly used in concrete materials to replace cement at this stage, but the application of this material in foundation pit and even foundation treatment is basically blank, and there is a need for further research and expansion of application.