Abstract:

Shallow landslides happen frequently after continuous rainfall at mountain overhead transmission lines, which have many influencial factors and bring serious hidden danger to power transmission lines. Using the self-developed small-scale model flume, the experiments of shallow landslides triggered on sandy soil under simulated rainfall were carried out to investigate the displacement fields and failure modes of shallow landslides, as well as to study the inherent mechanism of shallow landslide under heavy rainfall conditions. The results show that the shallow landslides processes involve a complex course including rainfall infiltration, soil deformation, metrics suction lost, pore pressure rise and water-soil interaction. The shallow landsides under heavy rainfall are changed into fluidized flow, and the fluidized soil pushes the front soil to move rapidly.

Key words: overhead transmission line, shallow landslide, rainfall, indoor test, water-soil interaction