Water-tight bore shaft foundation

Water-tight bore shaft foundation, particularly for bore shafts which are subjected to significant mining influences, the bore shaft foundations being formed by a base (10) for a shaft structure (3), the base (10) being made of underwater concrete after the outwardly tight shaft structure has been floated in, and by a soft asphalt (13) introduced into the annular space between the shaft structure (3) and the ground above the base (10) while displacing the drilling liquid (2), characterized in that a hydraulic tilting joint arrangement (15, 20) is provided between the base (10) and the shaft structure (3), the tilting joint arrangement being formed by a thrust bearing arranged on the end face of the shaft structure (3) and filled with a hydraulic medium (19) and by an annular cylinder (20) which rests circumferentially on the outside of the lower portion of the shaft structure (3), the annular cylinder being formed of a steel jacket which is also filled with the hydraulic medium (19), and that the annular cylinder (20) extends from the thrust bearing (15) upwardly through an end face (23) of a portion (21) of the base (10) which surrounds in a circular ring shape the shaft structure (3) up into the annular space with the soft asphalt (13).