EARTH WATER PRESSURE-SHEAR FORCE MEASUREMENT SENSOR

• Main Authors: KOBAYASHI TOSHIYUKI, KAYUKAWA KOJI, NAGURA HIROSHI, FUJIMOTO AKIO, YABE KOICHI, NIIHARA KEISUKE, KOSHIDA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 08.06.2017
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

PROBLEM TO BE SOLVED: To provide a sensor for simultaneously measuring earth water pressure and shear force, by being installed in respective parts for making the earth water pressure and the shear force by a working face or excavation sediment of the natural ground act, in various boring machines.SOLUTION: A sensor M comprises a case 3, a pressure receiving part 4 arranged in a tip opening surface of the case 3 and a sensitivity part 5 installed in the case 3, distortedly deforming the pressure receiving part 4 so that the pressure receiving part 4 can be advanced-retreated in the axial direction of the case by receiving earth water pressure, distortedly deforming the pressure receiving part 4 so that the pressure receiving part 4 can be rocked around the axis of the case by receiving shear force and detecting respective distortion amounts by the earth water pressure and the shear force as a change in electric resistance, and simultaneously measures the earth water pressure and the shear force by one sensor.SELECTED DRAWING: Figure 1 【課題】各種の掘進機において地山の切羽又は掘削土砂による土水圧力及びせん断力が作用する各部に設置して、土水圧力とせん断力とを同時に測定するセンサの提供。【解決手段】センサＭは、ケース３と、ケース３の先端開口面内に配置される受圧部４と、ケース３内に設置され、受圧部４が土水圧力を受けて受圧部４をケースの軸心方向に進退可能に歪み変形し、受圧部４がせん断力を受けて受圧部４をケースの軸心を中心に揺動可能に歪み変形して、土水圧力及びせん断力による各歪み量を電気抵抗の変化として検出する感度部５とを備え、土水圧力及びせん断力を１台のセンサで同時に測定する。【選択図】図１