| 摘要 |
<p>PURPOSE:To enable execution of continuous observation, by a method wherein a sensor guide insertion hole is formed, an electromagnetic wave transmitter receiver and a resilient wave transmitter are mounted to the tip thereof, and resilient wave receiver is mounted to the front of a cutter head to analyze an underground pass signal transmitted from front underground. CONSTITUTION:An electromagnetic wave transmitter 4, a receiver 5, and a resilient wave transmitter 6 are situated to a sensor guide 3 at the central part of a cutter head 2 at the front of a tunnel excavator 1. A receiver 7 is located in the vicinity of the outer periphery of the front of the cutter head, and a signal processing device 8 and a display device 9 are mounted in the excavator 1. Through the working of a front detecting device, a pulse electromagnetic wave is received from the transmitter 4, and is reflected by a water vein 12 in front to analyze and detect it by the processing device 8 by means of a signal from the receiver 5. A resilient wave having a different frequency is transmitted from the resilient wave transmitter 6 in A-earth 10 and B-earth 11, and an earth state is detected by the processing device 8 by means of a signal from the receiver 7. This constitution enables execution of continuous observation by means of the display device 9.</p> |
