What are the better real-time tunnel geological advance prediction systems for shield tunnels?

A geological advanced detection technology developed by GET company in Germany and patented by Germany-BEAM shield tunneling real-time tunnel geological advanced prediction system. A geological advance prediction system based on the principle of focused current induced polarization method is specially designed and applied in the field of underground engineering and construction industry, which is not only suitable for the measurement of existing tunnels, but also suitable for the installation and use of modern and highly mechanized shield machines. It is a durable and long-term equipment, which can meet the requirements of geophysical exploration under harsh environmental conditions in tunnel engineering. Through the beam system, the shield machine can keep continuous tunneling and continuously detect the geological conditions three times the tunnel diameter distance in front of the tunnel. Automatic data collection and geological evaluation, and then real-time display of prediction results, is conducive to rapid on-site judgment. The beam can be installed and used in EPB shield machine, slurry shield machine, grab shield machine, single shield machine or double shield machine, and is not affected by any hard rock and soft soil geological conditions. The main components of the beam detection system are the measuring unit which can be placed in the operation room of the shield machine and the cutter head of the shield machine as the measuring electrode. In the complete set of monitors, the measuring unit is connected with the guiding system of the shield machine and the programmable controller (PLC), and receives the signals of the position and running state of the shield machine, thus automatically collecting data and displaying them in real time. GET Company is a world-renowned geophysical service company with experience in exploring underground structures and geological features, specializing in geophysical projects in application fields such as groundwater, geotechnical engineering, environmental engineering and detection of metals and unknown objects, and also providing modern geophysical exploration equipment. Commercial application began in 2000. In the global shield tunnel project, the total length of the geological advance forecast tunnel completed through the instrument leasing service of GET Company exceeds 100KM.