Recently, EPC and Yunnan Aerospace Engineering Geophysical Detecting Co., Ltd. reached a cooperation.
EPC will be the sole agent of the three-dimensional imaging tunnel geological advance forecaster (AGI-T3) independently developed by Yunnan Aerospace Engineering Geophysical Detecting Co., Ltd., and will be fully responsible for the promotion and sales of AGI-T3 in mainland China, Hong Kong and Macau.
Yunnan Aerospace Engineering Geophysical Detecting Co., Ltd. is a national high-tech enterprise and a leading domestic engineering geophysical prospecting R&D and production unit. It has leading advantages in engineering survey, advanced forecasting, bolt detection and other technical development and services. It has well-known experts in the industry, a large number of professional and technical personnel, and advanced technical equipment at home and abroad. It has undertaken many aerospace military and engineering civilian scientific research projects. Participated in the geological survey, advance forecast and diagnosis of diseased tunnels in many highway tunnels in Yunnan.
The AGI-T3 three-dimensional imaging tunnel geological advance forecaster is based on seismic wave simulation analysis and three-point positioning theory; applying two-dimensional filter denoising, wave velocity scanning analysis and wireless communication technologies to achieve rapid seismic wave signal acquisition and direct three-dimensional imaging of longitudinal and longitudinal waves.
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Main features |
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Wireless acquisition |
3D imaging |
Vibration source optional |
All instruments are wirelessly connected
The signal trigger and data transmission are all wireless; hammer or explosive shock source can be selected, and the site work is convenient and fast.
Signal direct 3D imaging
Based on the principle of three-point positioning in space, rapid acquisition of seismic wave signals and direct three-dimensional imaging of vertical and horizontal waves can be realized, which can intuitively and accurately reflect geological conditions from multiple angles.
Diffraction migration superposition + common reflection surface element = "3D imaging of diffraction migration
Diffraction migration 3D imaging
Two-dimensional filtered signal equalization
The application of "FK" two-dimensional filtering and signal synchronization equalization technology can effectively extract the echo signal from the front of the palm face, and improve the accuracy and accuracy of three-dimensional imaging.
Wave speed scanning automatic layering
The development of wave velocity scanning analysis and automatic layering methods can accurately obtain the surrounding rock wave velocity and lithology parameters (provide a basis for construction design) to further improve the imaging accuracy.
AGI-T3 three-dimensional imaging tunnel geological advance predictor
Fundamental concept
The basic principle of AGI-T3 is similar to the seismic reflection method, and it is a geophysical method for multi-wave and multi-component reflection seismic exploration. On-site work is to set up multiple focal points on the left and right walls of the tunnel, and then use artificial hammering (or use an explosive source) to excite elastic waves. When the elastic waves propagate along the front of the palm face, they encounter fault planes and karsts. Such bad geological bodies will generate reflected and scattered echo signals, which are then received by sensors placed in the tunnel. According to the travel time and energy of the echo signals, the spatial distribution position and type of the bad geological bodies can be obtained by applying 3D imaging technology; At the same time ,the application of speed scanning analysis can measure the wave velocity of the rock mass in the forecast section, which provides an important basis for determining the surrounding rock grade.
Comparative verification
Source: Zhao Guojun, Li Junjie, Jiang Zonggao, et al. Application of AGI-T3 in advanced geological prediction of water conveyance tunnel[J], Water Resources and Hydropower Technology, 2018.
Applications
