DETERMINATION DEVICE AND DETERMINATION METHOD

• Main Authors: TSUCHIYA TSUTOMU, KUMEGAWA MASANORI, ABE HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2016
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; NOZZLES; PERFORMING OPERATIONS; SOIL SHIFTING; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a determination device and a determination method in which an injection nozzle for injecting a jet flow (jet) having a long ground cutting distance is inspected in a stage prior to introducing a large diameter jet mixing method into a construction site, and a determination is made whether or not the inspected injection nozzle is a defective product.SOLUTION: A nozzle being an inspection object is attached to an injection port and a jet is injected from a jet injection device 1. The measurement result measured by a pressure sensing unit 2 when the jet collides to a pressure sensing unit 2 is processed by a control device 10 (e.g., a computer). A decision is made that the nozzle being the inspection object is a non-defective product when a first ratio is a first predetermined value or higher, a second ratio is a second predetermined value or higher, and a third ratio is a third predetermined value or higher.SELECTED DRAWING: Figure 1 【課題】大口径噴射攪拌工法の施工現場に導入する以前の段階で、地盤切削距離が長い噴流（ジェット）を噴射するための噴射用ノズルを検品して、検品された噴射用ノズルが不良品であるか否かを判定する判定装置及び判定方法を提供する。【解決手段】検査対象であるノズルを噴射口に取り付けて噴流噴射装置１から噴流を噴射し、当該噴流が圧力感知部２に衝突した際に圧力感知部２で計測した計測結果を制御装置１０（例えばコンピュータ）により処理し、第１の比率が第１の所定値以上であり、第２の比率が第２の所定値以上であり、且つ、第３の比率が第３の所定値以上である場合に検査対象であるノズルを良品と判断する。【選択図】図１