EARTHQUAKE INSULATION METHOD DURING EXECUTION OF JACK-UP CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To ensure safety during jack-up construction by a method wherein an earthquake insulation support arranged at the lower part of a jack-up rack is fixed during a time in which a building frame is built for a low story section and released when it covers a high story section to provide an earthquake insulation function. ;SOLUTION: An earthquake insulation support 9 is nipped between upper and lower bases 10 and 11, and a jack-up rack 2 is installed on the upper base 10. A hydraulic jack 6 is placed on a jack lower frame 8 and a building frame is erected 1 through a jack upper beam 7. Through repetition of expansion and contraction of the hydraulic jack 6, jack-up by a distance equivalent to the height of one story is effected and the building frame 1 is supported by the upper frame support material of a gate bar beam arranged on the upper part of a jack-up rack 2. Thereafter, a hydraulic cylinder 6 and jack upper and lower beams 7 and 8 are removed, a building is executed in such a manner that a lower floor story is suspended from the building frame 1. The hydraulic jack 6 is mounted on the lower part and through repetition of jack-up, construction is executed. The earthquake insulation support 9 is fixed by a steel frame in a low story section and released from fixing in a high story section to provide an earthquake insulation function.;COPYRIGHT: (C)1997,JPO