A large area of deep coastal soft soil layer is widely distributed in the coastal area. It has the remarkable characteristics of ’three-high, two-low, and one-long characteristic’ with high water content, high compressibility, high organic matter content, low bearing capacity, low permeability, and long deformation stability time. Solidification treatment is one of the most used and most effective methods. An in-depth understanding of the solidification mechanism, strength characteristics, and durability of solidified soft soil is crucial for ensuring the long-term safety and stability of solidified coastal soft soil foundation. The strength and durability of the cement solidified coastal soft soil are reviewed. The multi-scale coupling solidification mechanism of cement on coastal soft soil is clarified. The shortcomings of the current research on solidified coastal soft soil are discussed, and the potential research suggestions with cutting-edge are discussed, which provides new thoughts and ideas for the follow-up scientific research and engineering application.

Cement mixing pile reinforcement technology is one of the most commonly used and effective methods for coastal soft soil foundation treatment. Fully grasping the dynamic characteristics and dynamic evolution laws of cement solidified coastal soft soil is an important prerequisite to ensure the safety and stability of cement mixed pile soft soil foundation under the dynamic loads generated by dense subway network and continuous wave action. A review is conducted on the dynamic characteristics and constitutive models of cement solidified coastal soft soil both domestically and internationally. The dynamic test types, dynamic characteristic indicators, dynamic constitutive models, and optimization methods of cement solidified coastal soft soil are systematically summarized and analyzed. The shortcomings of current researches on the dynamic characteristics of cement solidified coastal soft soil are discussed, and targeted research suggestions are explored, which may provide new thinking and ideas for the study of the dynamic characteristics of cement soil.