Comprehensive advance geological detection system carried by tunnel boring machine

Abstract

The invention discloses a comprehensive advance geological detection system carried by a tunnel boring machine. The comprehensive advance geological detection system comprises a multifunctional combination main frame, an induced polarization detection device, an earthquake wave detection device, an integrated junction device, a drilling geological radar detection device and a comprehensive interpretation decision system. The multifunctional combination main frame comprises a time division multiplexing control module, an excitation source control module and a parallel data collecting module. The excitation source control module outputs trigger signals to the three detection devices respectively, the three detection devices respectively output measurement data and feedback signals to the time division multiplexing control module through the parallel data collecting module. The comprehensive interpretation decision system supports geological interpretations and decisions through the inversion / migration imaging joint inversion of three detection methods. The detection system greatly improves the automation degree and detection speed of detection equipment on the tunnel boring machine, and multiple kinds of detection equipment can be carried by the tunnel boring machine.

Description

technical field [0001] The invention relates to a comprehensive advanced geological detection system mounted on a tunnel boring machine, in particular to a multi-functional joint host, a comprehensive interpretation decision system and a mounting device for three types of detection equipment. Background technique [0002] In the process of tunnel (cave) construction, it is internationally recognized that the construction method of tunnel boring machine has advantages unmatched by drilling and blasting construction methods such as "fast excavation speed, small construction disturbance, high hole quality, high comprehensive economic and social benefits, and safe and civilized construction". Significant advantage. At present, 30% to 40% of the excavated tunnels in the world are completed by tunnel boring machines. The number of tunnels excavated by tunnel boring machines exceeds 1,000, with a cumulative length of more than 5,000 kilometers. ) must be constructed with tunnel bo...

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Problems solved by technology

[0004] For advanced geological prediction technology and detection devices, tunnel boring machine construction is fundamentally different from drill-and-blast method construction: ① Tunnel boring machine is a giant, occupying most of the space behind the tunnel face, and cannot The wall layout commonly used excitation shot point and receiving system for seismic wave advance prediction makes it impossible to apply earthquake advanced prediction technologies such as TSP (Tunnel Seismic Prediction, Amberg Measurement Technology Company of Switzerland) and TRT (True Reflection Tomography, NSA Engineering Company of the United States);② There are a large number of metal components and power supply cables in the tunnel boring machine, which will generate huge electromagnetic interference, resulting in unsatisfactory detection results of ground radar method and transient electromagnetic method; ③During the construction of the tunnel boring machine, there are about two hours of maintenance every day At this time, the cutter head of the tunnel boring machine retreats 1-2m, which is the only link that can be used for advanced geological prediction, but its space is narrow and the time is short

In general, the advanced geological prediction in the tunnel boring machine construction environment faces the problems of "narrow observation space, complex electromagnetic environment, and short detection time"

[0005] At present, there are mainly the following types of technologies and instruments used for advanced geological prediction of tunnel boring machine construction in the world: ①Drilling with advanced drilling rig equipped with tunnel boring machine, the disadvantage is that it can only reveal the geological conditions around the borehole , cannot reflect the geological conditions in the entire range in front of the working face, and it is easy to miss geological anomalies, resulting in misreporting, misreporting and hidden dangers of disasters; ) system, but BEAM technology can only qualitatively judge whether there is water-bearing body within a certain range in front of the tunnel face, and its positioning accuracy is easily disturbed by the field environment, and it is not possible to estimate and predict the water volume; ③Use the seismic reflection method ISIS (Integrated Seismic Imaging System (Germany GFZ Company) system, from the observation method of ISIS, adopts the traditional VSP (Vertical Seismic Profiling) method, which can detect large-scale geological anomalies such as faults, but cannot identify water-bearing bodies. It is a difficult problem to remove the vibration interference of tunnel boring machine construction

④ Seismic soft soil detection SSP (Sonic Softground Probing, Herrenknecht, Germany) system is a seismic wave system specially used for boulder detection in soft soil. The detection distance generally does not exceed 40m, and the application range is limited

[0011] (1) Since the observation space in the construction environment of the tunnel boring machine is very narrow, only the space of 1-2 meters between the cutterhead and the tunnel face can be used during maintenance. How to use this detection technology such as seismic method, electrical method and electromagnetic method Effective observation in space is a difficult problem;

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