Method and arrangement for stressing a staggered anchorage
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United States of America Patent
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Jun 30, 2009
Grant Date -
Sep 14, 2006
app pub date -
Mar 10, 2006
filing date -
Mar 10, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for tensioning a staggered anchorage comprised of a plurality of tension members, which are anchored in a bore hole at various depths, thus having different free steel lengths. For each staggered anchorage, each tension member is tensioned up to a predetermined maximal load and is then subsequently adjusted to the working load. To achieve a consistent elongation reserve of the individual tension member and thus to increase the security of a staggered anchorage, the staggered anchorage is adjusted to the working load, all tension members are adjusted to a reduced elongation (.DELTA.I.sub.w) by a uniform elongation difference (.DELTA.I.sub.max-.DELTA.I.sub.w) relative to the respective elongation (.DELTA.I.sub.max) of the predetermined maximal load. An arrangement for performing the method has a single tensioning plane, which is force interconnected with defined locking elements that are arranged on tension members in clamping planes.
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