Electric pole to be used in electric exploration to test the ground status in the rear-area of a tunnel made by pre-pressed concrete shield blocks

摘要

PURPOSE: An electric survey electrode for investigating a ground state of a backside of an upper part of an electrode shield tunnel is provided to fix an electrode to a nut of a shield block without using an additional fixing unit. CONSTITUTION: An electric survey electrode for investigating a ground state of a backside of an upper part of an electrode shield tunnel includes a contactor, a supporter, and a fixing unit. The contactor(10) is formed with a shape of a circle. The contactor is inserted into a nut of a shield block. The contactor is connected to an upper part of the supporter(20). A lower part of the supporter is connected to an electric wire. The electric wire is connected to a transmitter and a receiver. The fixing unit(30) is combined with an upper end and a lower end of the supporter in order to fix the contactor and the electric wire.