With the frequent occurrence of extreme weather events and the intensification of human engineering activities, the geological disasters and geotechnical engineering problems are now becoming more and more prominent. To prevent and mitigate various geological disasters, protect the geological environment and enhance the sustainable development of human society, improving the monitoring technologies in geotechnical and geological engineering is necessary. Using distributed opto-electronic sensor-based monitoring technologies is a new trend in the field of geotechnical and geological engineering in recent years, with the fast development of distributed monitoring technologies such as Rayleigh optical time/frequency domain technologies (OTDR, OFDR), Brillouin optical time/ frequency domain technologies (BOTDR/A, BOFDA), Raman optical time/frequency domain technologies (ROTOR/ROFDR), fiber Bragg grating technologies (FBG), optical interferometry technologies (COTDR, OBR), optical fiber fluorescence technologies, electric time/ frequency domain technologies (TDR, FDA), and Micro-Electro-Mechanism System (MEMS) technologies and Ground Penetrating Radar (GPR), etc. The application of these technologies has received great traction for their growing importance in the monitoring field of geotechnical and geological engineering. Meanwhile, however, there are many challenges in developing these technologies.
In this context, the international forum on Opto-electronic Sensor-based Monitoring in Geo-engineering was set up by Professor Bin Shi in Nanjing University in 2005 with the financial support of the National Natural Science Foundation of China. The event is held every two or three years. By now four forums have been held with great success in 2005, 2007, 2010 and 2012 respectively and with its influence significantly growing both in China and foreign countries.