Applications of distributed opto-electronic sensing technologies in geotechnical engineering monitoringMaocai Zhao, Sergey Kudryavtsev, Semen Bugunov, Vyacheslav Shemyakin and Yuliya BugunovaE3S Web Conf., 138 (2019) 01006DOI: https://doi.org/10.1051/e3sconf/201913801006