The present invention relates to an assembly comprising a tower for supporting a wind turbine and a tubular monopile for driving into the sea floor. The monopile includes a monopile flange that extends in a radial direction from a peripheral wall of the monopile. The monopile flange has a monopile flange surface for supporting the tower. The monopile has a collision portion for receiving an anvil strike. It extends to the side of the surface of the monopile flange in the radial direction of the collision part. When the monopile supports the tower, the tower and the monopile are spaced apart in the longitudinal direction of the monopile at the collision part and in the monopile radial direction on the side of the monopile flange surface. It is formed to be.
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