Advanced three-dimensional resistivity cross-hole CT boulder detection system and detection method carried by shield tunneling machine

Abstract

The invention discloses an advanced three-dimensional electrical resistivity cross-hole computed tomography (CT) solitary stone detection system carried by a shield tunneling machine and a detection method. The system comprises an advanced drilling device capable of drilling at least four drill holes in the rock surface. The multiple drill holes form a three-dimensional detection space. The advanced drilling device comprises a drilling machine. The bottom of the drilling machine is movably fixed to a rail on the inner circumference of a shield. A drill bit of the drilling machine penetrates through an advanced grouting hole of the shield. The system further comprises a detection electrode coupling device which stretches into the drill holes, is provided with a plurality of electrodes, and is capable of releasing electrolytes to the electrodes. The detection electrode coupling device is connected with a host machine used for applying a three-dimensional space electric field through a cable. The advanced three-dimensional electrical resistivity cross-hole CT solitary stone detection system carried by the shield tunneling machine and the detection method have the beneficial effects that the defects that holes cannot be drilled in a cutter head of the shield tunneling machine, or a drilling device cannot be installed on a tunnel face are effectively overcome; the advanced drilling device is installed in the shield of the shield tunneling machine, and advanced drilling is achieved through the advanced grouting hole in the shield of the shield tunneling machine; and difficulty in the prior art is overcome, and simplicity and convenience are achieved.

Description

technical field [0001] The invention relates to boulder detection, in particular to an advanced three-dimensional resistivity cross-hole CT boulder detection system and method carried on a shield boring machine. Background technique [0002] As a big country with economic development, our country will build more tunnels in the construction of urban subway projects. At present, more and more shield tunneling machines are used in the construction of subway tunnels in my country. The construction of shield tunneling machines has the advantages of high degree of automation, one-time hole formation, fast construction speed, reasonable economy, and not affected by climate. However, the shield tunneling machine has poor adaptability to complex strata. During the construction of the subway, it was found that the shield tunneling machine is easy to encounter boulder groups during long-distance tunneling. If the spatial position and size of these boulders cannot be ascertained in adv...

AI Technical Summary

Problems solved by technology

[0008] The advanced three-dimensional resistivity cross-hole CT boulder detection system equipped on the shield tunneling machine includes an advanced drilling device that can drill at least four holes on the rock surface. Multiple drilling holes constitute a three-dimensional detection space. The advanced drilling device includes Hole machine, the bottom of the drilling machine is movable and fixed in the track of the inner circumference of the shield, and the drill bit of the drilling machine passes through the advanced grouting hole of the shield; The detection electrode coupling device from the liquid to the electrode, the detection electrode coupling device is connected to the host computer for applying a three-dimensional electric field through a cable; the advanced grouting hole of the shield is used to drill holes, and the existing conditions are effectively used to overcome the inability to be installed on the shield cutter head. Insufficient upper openings, the electrodes are in contact with the rock surface, and after the detection electrode coupling device releases the electrolyte to the electrodes, the automatic data collection of different electrode distances and different electrode arrangements can be realized, and a large amount of data can be obtained

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