After getting identical results between numerical analysis and model experiment,this paper analyzes and builds an expression between the least pile length embedded in rock and horizontal load and modules ratio of rock,draws a conclusion that load limit can be decided through the curves of displacement ratio,and discusses the functions of both the least pile length and the expression.

With the flexibility fulcrum method to estimate displacement,the embedded depth of support member is analyzed according to equivalent beam method or the method of controlling the bottom displacement.

It is assumed that the stability of an embedded large cylinder breakwater mainly depends on its embedded depth in soil.

The nature of Xigeda rock is similar to very soft rock, but we have not worked out a clear and complete method to calculate anti-slide pile located in very soft rock in the present norms, and can not find the specialized research literature in this field of determination of embedded depth of anti-slide .

By introducing strength reduction FEM and engineering case,the application of the method of strength reduction FEM and limit equilibrium method in the design of embedment length of free segment of cable is explained and compared.

Steel pipe piles are used to support the bottom of steel sheet pile to avoid excessive bottom displacement and cofferdams unstability due to less embedment length of steel sheet pile cofferdams.