00 m was concrete of Grade C30 and F300,considering the tight construction schedule and high quality demand of the project,it was not allowed to place the second lift of concrete for the height in the designs,therefore,the construction technology for underwater pouring of frost resistance concrete was adoped and satisfactory resul.

Influence of underwater casting on mud solidification;

The measure of improving the durability of the underwater casting concrete;

This paper introduces the requirements for the selection of raw materials in the construction of underwater engineering, expounds the performance and design of mix proportion of the tremie concrete, and probes into the reasons of the common accidents of the tremie concrete and the settlement measures.