METHOD OF APPLYING PRE-TIGHTENING FORCE ON AN ANCHOR BOLT
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United States of America Patent
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Issued Date -
Apr 18, 2013
app pub date -
Oct 15, 2012
filing date -
Oct 17, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a method of applying a pre-tightening force on an anchor bolt, which comprises: installing washers with a predetermined dimension between tower flange and fastening nuts, the washers are configured to support the supporting bridge of tensioner; applying a pre-tightening force on the anchor bolts in an inner ring and the anchor bolts in an outer ring installed on the tower flange with the tensioners. According to the present invention, the method of applying a pre-tightening force on an anchor bolt adopts the washer with a predetermined dimension to replace the conventional washer, such that the tensioner will not directly contact the surface of tower flange, and pressure of the tensioner is transmitted uniformly to tower flange via the washer, avoiding damage to paint on the surface of tower flange and improving installation quality and service life of the tower.
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