| 摘要 |
<P>PROBLEM TO BE SOLVED: To change an installation position after pile driving or to enable iterative use also suitably for frequent mobility and large temporary structure support by stably keeping vertical support of a weight object with a moment load, without requiring burying of fundamental concrete under the ground. <P>SOLUTION: There are provided base plates 3 fixed to lower parts of a plurality of gate columns 6 of a temporary gate and spiral piles 10 which are inserted and fixed to a plurality of plate surfaces of the base plates, extend under the base plates and are buried within an installation plane. Each of the spiral piles 10 is integrally comprised of a torsion plate 1 in a twisted shape spirally extending around an extension axis and a fixing rod 2 extending from the center of an upper end of the torsion plate onto the extension axis. The base plates are held and fixed horizontally by plate fixing tools holding the base plates on upper and lower surfaces. <P>COPYRIGHT: (C)2013,JPO&INPIT |
