| 摘要 |
PROBLEM TO BE SOLVED: To suppress an excessive increase in total used electric power of a tunnel construction system in tunnel excavation while maintaining a work environment.SOLUTION: In tunnel excavation, the total used electric power of a tunnel construction system is measured and specified in S1 and S2. In S3, the specified total used electric power is compared with a preset management value. When the total used electric power of the tunnel construction system exceeds the management value, an advance to S5 is made, the total used electric power is decreased by decreasing the rotating speed of a cutter head, the extension speed of a propulsion jack, the earth and sand conveying speed of a screw conveyor, the earth and sand conveying speed of a belt conveyor, and the earth and sand conveying speed of a vertical screw conveyor respectively. The processes S1-S3 and S5 are repeated until the total used electric power is decreased to the management value or less and when the total used electric power is decreased to the management value or less, an advance to S4 is made to continue the excavation of the tunnel. |
