TUNNEL EXCAVATING TECHNIQUE BY ANTERIOR GUIDANCE CONTROL

摘要

PURPOSE:To attain tunnel construction running along a planning line by burying a transmitter at the prescribed position in front of digging direction of an excavator, and setting up the receiver synchronizing with the radio wave of specified frequency of the transmitter. CONSTITUTION:A shielding excavator 1 is installed at the tunnel excavating start point and the first transmitter H1 and second transmitter H2 are buried separately in the prescribed depth near the planning line L scheduled for the tunnel excavation. A receiver 2 synchronizing with the specified frequency to be transmitted from both transmitters H1, H2 is fitted to the excavator 1. The specified frequency transmitted from the transmitters H1, H2 is then received by the receiver 2. A surveying equipment, an arithmetic processing unit and a display unit are incorporated to the receiver 2 and the correcting direction and correcting distance of the excavator 1 and excavating geology are displayed correctly by these equipment. Now by performing the track correction of the excavator 1 according to the display thereof the tunnel accorded with the planning line L can be constructed correctly.