Push rise construction method and device null of large span

摘要

PURPOSE: To lift up a large-span structure safely and with good working efficiency. ;CONSTITUTION: A hydraulic jack 8 on the lower reaction force receiving beam of upper and lower reaction force receiving beams suspended from the top beam by upper and lower hydraulic rotary nuts 9a is elongated by four tension rods 4 to push up a structure for one stroke. The upper reaction force receiving beam 7 is turned to turn the structure to the top beam, and the hydraulic jack 8 is elongated and contracted to raise the lower reaction force receiving beam 6, thereby push up the structure for a fixed height like a measuring worm. After that, a strut 22 is jointed in addition and the same procedure is repeated to push up the structure to a designated height.;COPYRIGHT: (C)1993,JPO&Japio