Distributed acquisition, characterization and process analysis of multi-field information in slopes

The slope is a multiphase composite system including solid, liquid and gas phases. Slope stability changes under the actions of stress, temperature and seepage. Slopes will be very prone to landslide if in an unstable state. In this paper, considering the contributions of different fields to the landslide, the distributed acquisition, characterization and stability analysis of multi-field information from slopes was studied systematically using distributed fiber optic sensing (DFOS) technology. A sensing system based on DFOS was designed and developed for multi-field information monitoring, including stress, temperature, seepage and deformation. The corresponding methods for data processing, identification and methods for characterization description are also proposed. On this basis, the evolution of the slope is analyzed. Finally, monitoring results of the DFOS system from the Majiagou landslide are shown as a case study for verification. (C) 2014 Elsevier B.V. All rights reserved.