Taking construction of maritime bored piles in Hangzhou Gulf Bridge and Jintang Bridge as example,technologies of maritime mud-making drilling and of post-grouting in maritime bored piles are introduced in this paper.

According to marine environment influenced by tide and special climate conditions of Northeast China,seawater slurry,marine concrete and winter construction of bored piles are adopted integrally,which means boring holes with seawater slurry and pouring concrete considering of anti-freezing and anti-corruption.

Study and application of new kind of seawater cement slurry;