초록 ▼

A closure for a prestressed high-pressure vessel comprises an anchoring ring surrounding the opening of the prestressed concrete pressure vessel, a plurality of axial stressing cables and a plurality of cover stressing cables. The cover is separately prestressed and simultaneously anchored to the pr

A closure for a prestressed high-pressure vessel comprises an anchoring ring surrounding the opening of the prestressed concrete pressure vessel, a plurality of axial stressing cables and a plurality of cover stressing cables. The cover is separately prestressed and simultaneously anchored to the prestressed concrete pressure vessel. The anchoring rings on the concret need for releasing the axial stressing cables of the prestressed concrete pressure vessel.

대표청구항 ▼

A removable stressed concrete cover for large openings in prestressed concrete pressure vessels comprising: an anchoring ring surrounding the rim area of the opening; a plurality of axial stressing cables extending from the prestressed concrete pressure vessel and through said anchoring ring; an anc

A removable stressed concrete cover for large openings in prestressed concrete pressure vessels comprising: an anchoring ring surrounding the rim area of the opening; a plurality of axial stressing cables extending from the prestressed concrete pressure vessel and through said anchoring ring; an anchoring bolt securing the end of each of said axial stressing cables to said anchoring ring; a concrete cover member; a plurality of cover stressing cables extending through said concrete cover member through said anchoring ring and into the prestressed concrete pressure vessel, and at least two of said cover stressing cables being joined at one end and secured by a single anchoring bolt; means for releasably securing said cover stressing cables to said concrete cover member whereby releasing said cover stressing cables does not affect said axial stressing cables, and a retaining ring on the outer rim of the upper part of said concrete cover member wherein said cover stressing cables extend through said retaining ring and are arranged in pitch circles alternatingly from an inner pitch circle to an outer pitch circle about the central axis of said retaining ring.