Double shield TBM tunnel face rock mass three-dimensional image imaging device

Abstract

The invention discloses a double shield TBM tunnel face rock mass three-dimensional image imaging device, which belongs to the technical field of geological logging. The device comprises a target system, a photographing system and a control system which are arranged on a cutter head, wherein the target system comprises an injector capable of spraying the target to the front of the cutter head, thephotographing system comprises a plurality of cameras, pictures shot by the cameras along with the rotation of the cutter head are spliced and then completely cover the tunnel face; and the control system is used for controlling the injection targets of the injector and the shooting actions of the cameras. According to the device, a series of photos covering the whole tunnel face rock mass are obtained by rotating the cutter head to photograph in a non-tunneling period, a tunnel face panoramic three-dimensional image model under an engineering coordinate system is synthesized by utilizing animage splicing processing software combining the target position information, the imaging process is safe, convenient and fast, and basic results and analysis bases can be provided for identificationof later rock mass lithology characteristics, joint structures and underground water development characteristics and measurement of corresponding occurrence, length, area and other information.

Description

technical field [0001] The invention relates to the technical field of geological cataloging, in particular to a three-dimensional image imaging device and an imaging method for rock mass at the tunnel face of a double-shield TBM tunnel. Background technique [0002] At present, the double-shield TBM tunnel construction technology is more and more widely used in practical engineering. However, during the construction of the double-shield TBM, it was difficult to conduct a comprehensive observation of the rock mass at the tunnel face due to the blockage of the cutter head and the shield body during the construction of the double-shield TBM, which also brought great troubles to the geological cataloging work during the construction period. If the panoramic image data of the face can be obtained, it can help geological engineers to have a comprehensive and intuitive understanding of the geological conditions of the face, and further form the geological catalog results through t...

AI Technical Summary

Problems solved by technology

[0004] The first method is to take pictures through the pores of various parts on the cutter head. The disadvantage of this method is that the rock mass that can be seen through the pores on the cutter head is very limited, and the area of ​​the rock mass that can be observed is only about 100% of the excavation area. One percent of the total surface area, and the pore positions are relatively scattered

Therefore, based on sporadic and scattered rock mass information, it is impossible to accurately understand the geological conditions of the face. For example, long cracks may only be partially visible or short and small cracks may be missed.

[0005] The second method is that the staff enters between the cutter head and the face to take pictures from the entrance on the cutter head. The defect of this method is that the gap between the cutter head and the face is very narrow, and it is difficult to take pictures of the rock mass on the face. When the shooting angle is limited, it is difficult to obtain a frontal panoramic image, and it is extremely inconvenient for personnel to work and escape

Moreover, since the rock mass in front of the tunnel face is in an unsupported state, there are major safety hazards

At the same time, affected by the heat dissipation of the cutter head and construction dust, the working environment is also very harsh

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