| 摘要 |
<p>PROBLEM TO BE SOLVED: To allow a circular rod of screw engagement type to be used in a high pressure jetting agitation construction method of swing rotation method, by surely fixing a connection part of the circular rod.SOLUTION: A fixing device 10 is for a connection part of a ground improving jetting rod 1 whose cross section is circular which improves a peripheral ground by jetting a curing material from a jetting nozzle at a tip end part. The fixing device 10 includes two halved split bodies 11, 12. The split bodies 11, 12 are pivoted each other at one end, and can be fastened using a bolt 14 together at the other end. The split bodies 11, 12 are put on an outer peripheral surface of the periphery of the connection part of the jetting rod 1 so that the split bodies 11, 12 are fastened together using the bolt 14, thus, the periphery of the connection part is fastened to fix the connection part of the jetting rod 1.</p> |
