Underwater concrete structures are currently built on the bottom of the oceans at depths up to 1000 m. Up to approx 300 m are concreted "in situ". At greater depths - they are assembled from prefabricated elements made on land and connected under water with joints concreted there or not requiring concreting. This proves the level of mastery of the underwater concreting technique, which makes it possible to construct structures capable of transferring the pressure of the surrounding medium, of a few MPa. Thus, the opinion is reasoned, that concreting under water can be mastered to the same extent, like on land. So you can require, concrete laid under water or clay slurry (bentonite) in the conditions of civil engineering, that is, at depths not exceeding 30 m, had good quality, not different from the quality of concrete placed outside the water.

Underwater concreting methods used today: contractor methods (also called gravity pouring concreting), concreting with the use of a pump and the injection method, which are recommended in responsible foundation work of civil engineering construction.

Only some underwater concreting methods can be used to make structures in excavations spread with clay suspension. The contractor method is most suitable for this. They can also be used: a method of a hydraulic valve and concreting with a pump. However, injection concreting and a container must not be used.