Composite underground fluid conduit of concrete and steel sections
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United States of America Patent
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-
Dec 30, 1980
Grant Date -
N/A
app pub date -
Feb 27, 1979
filing date -
Feb 27, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite underground shaft lining assembly particularly suitable for use as a leak proof water conduit is formed with a plurality of annular concrete sections joined together by interposed layers of flexible joint material forming a composite concrete cylinder, with a composite steel cylinder formed of annular steel sections being arranged about the outer cylindrical surface of the composite concrete cylinder. The annular steel sections of the composite steel cylinder are joined together by spring rings located adjacent the flexible joints formed between the annular concrete sections.
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