BEAM technology, that is, advanced electrical monitoring technology, was developed by GET company in Germany and obtained German patent. It is a brand-new electrical exploration technology based on AC induced polarization. By measuring the changes of electric energy storage capacity parameters (PFE) and apparent resistivity related to the pores (voids) of rock mass, the integrity, cavities and water content of rock mass in front can be predicted.
The real-time forecasting system of beam shield machine of GET company in Germany, which is directly installed on the shield machine, can forecast the geological conditions of 3 times the tunnel diameter in front of the tunnel face in advance. Automatic data collection and geological evaluation, and then real-time display of prediction results, is conducive to rapid on-site judgment.
At present, the exclusive agent in China is Europe and America Dida Instrument and Equipment Co., Ltd.