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PILE MATERIAL DISCHARGE MEASUREMENT METHOD IN PILE DRIVING CONSTRUCTION METHOD
PILE MATERIAL DISCHARGE MEASUREMENT METHOD IN PILE DRIVING CONSTRUCTION METHOD
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机译：桩身施工法中桩身出料量的测量方法
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摘要
PURPOSE:To improve accuracy in measuring a discharged pile material by detecting a sound wave emitted to a tube air column under two different conditions of an open/close plate to obtain a resonance frequency, and measuring the discharge amount of the pile material after obtaining the top position thereof. CONSTITUTION:A white noise as a sound wave is emitted toward the inside of a casing 2 from a sound generation device 34 through a speaker 33, with an open/close plate 31 kept close. Then, the resonating sound of the noise is detected with a microphone 35. The resonance frequency fC of the detected output signal is analyzed with a frequency analyzer 36 for transmission to a tube air column operation section 37. Then, the resonating sound is similarly detected, with the open/close plate 31 kept open, and the resonance frequency fO is analyzed for transmission to the tube air column operation section 37. Tube air column length l is obtained with the tube air column operation section 37 under two different conditions of the open/close plate 31, thereby calculating the top position 11 of a pile material 5.
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