公开(公告)号：US20170343456A1

公开(公告)日：2017-11-30

申请号：US15535943

申请日：2015-04-22

申请人： CHEMICAL GROUTING CO., LTD.

发明人： Tsutomu TSUCHIYA ,  Masanori KUMEKAWA ,  Hiroyuki ABE

IPC分类号： G01N7/14

CPC分类号： G01N7/14 ,  B05B15/00 ,  E02D3/12 ,  G01M17/00 ,  G01M99/008

摘要： The purpose of the present invention is to provide a determining device and a determining method to determine whether an inspected jet nozzle is defective by inspecting the jet nozzle for injecting a jet stream with long ground penetrating distance at a stage before installing in a construction site where a large diameter jet grouting method is used. To achieve this purpose, with this invention, in which a nozzle to be inspected is mounted onto an outlet port, a jet stream is ejected from a jet stream generating device, and measurement data measured by a pressure sensing unit when the jet stream impacts the pressure sensing unit is processed with a controlling device (for example, a computer), a nozzle to be inspected is determined to be a non-defective product if a first ratio is no less than a first prescribed value, a second ratio is no less than a second prescribed value, and a third ratio is no less than a third prescribed value.