Prestressed articulated piling for marine foundations and the like

Claim 1

A PILING FOR SUPPORTING A PLATFORM IN A MARINE LOCATION COMPRISING, A VERTICALLY DISPOSED FIRST SUBSTANTIALLY HOLLOW, LONGITUDINAL PRECAST CONCRETE PILE MEMBER OF A TYPE TO BE FORCED INTO THE EARTH, A SUBSTANTIALLY SOLID UPPER END OF SAID FIRST MEMBER TERMINATING WITH A SEMISPHERICAL PORTION, A LONGITUDINAL OPENING CENTRALLY LOCATED IN SAID END CONNECTING SAID HOLLOW PORTION TO SAID SEMISPHERICAL PORTION AND EXTENDING UPWARDLY AND OUTWARDLY IN A CURVILINEAR MANNER TO INTERSECT THE EXTERNAL SURFACE OF SAID SEMI-SPHERICAL PORTION, A SECOND SUBSTANTIALLY HOLLOW, LONGITUDINALLY PRECAST CONCRETE PILE MEMBER, SAID SECOND MEMBER INCLUDING A CONCAVE RECESS AT ITS LOWER SUBSTANTIALLY SOLID END WITHIN WHICH SAID SEMI-SPHERICAL PORTION IS POSITIONED TO PERMIT ARTICULATE MOTION OF SAID SECOND MEMBER TO A GIVEN INCLINED POSITION WITH RESPECT TO SAID FIRST MEMBER, A LONGITUDINAL OPENING CENTRALLY LOCATED IN SAID LOWER END OF SAID SECOND MEMBER AND EXTENDING FROM THE HOLLOW PORTION OF SAID SECOND MEMBER TO SAID RECESS, THE UPPER END OF SAID SECOND MEMBER INCLUDING MEANS TO ATTACH TO SAID PLATFORM, A TENSIONED CABLE EXTENDING FROM THE SAID UPPER END OF SAID SECOND MEMBER INTERIORLY THROUGH SAID OPENING AT THE LOWER END OF SAID SECOND MEMBER, AND THROUGH SAID OPENING AT THE UPPER END OF SAID FIRST MEMBER, MEANS ANCHORING SAID TENSIONED CABLE TO SAID FIRST MEMBER, AND MEANS ANCHORING SAID TENSIONED CABLE TO SAID SECOND MEMBER AT A POSITION ABOVE SAID LONGITUDINAL OPENING THEREIN AFTER MOVING SAID SECOND MEMBER INTO SAID INCLINED POSITION.