APPARATUS AND METHOD FOR MEASUREMENT OF CONVEYED SOIL AMOUNT

• Main Authors: HASHIMOTO TSUKASA, IMAMURA HIDETOSHI, HARUTA KOSAKU, SUGIMOTO ISAO, HIGUCHI TADASHI, UMEHARA TSUTOMU, MORI NAOKI, SHIRAI MITSUO, KAWAMOTO TAIJIRO, SHIMIZU JUNICHI, WADA YOICHI
• Format: Patent
• Language: English
• Published: 28.11.1997
• Edition: 6
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; MINING; PHYSICS; SHAFTS; TESTING; TUNNELS

PROBLEM TO BE SOLVED: To measure a discharged earth-and-sand amount with high accuracy by a method wherein information regarding the filling degree of earth and sand to be filled into an earth-and-sand force-feed pipe is detected and the flow rate of the earth and sand is found on the basis of the information. SOLUTION: Information regarding the filling degree of earth and sand to be filled into a force-feed pipe which force-feeds earth and sand escavated by a shield excavator is detected by a detection means 10, and a flow-rate detection means 20 computes the flow rate of the earth and sand on the basis of the information. A force-feed-time measuring part 30 measures the force-feed time of one piston operation of a force-feed pump. A flow-velocity detection means 40 detects the flow velocity of the earth and sand inside the force-feed pipe, and a density detection means 60 measures the density of earth and sand discharged by the force-feed pump. On the basis of respective measured results, a volume computing part 50 and a weight computing part 70 compute the volume and the weight of the discharged earth and sand, and respective computed results are displayed or printed on a display part 80 or a printer 82. By this method, even when a gap or the like id generated inside the force-feed pipe, it can be compensated by the filling degree, and a flow-rate value can be measured precisely.