Experimental Characteristics of Bolt-Reinforced Slope Motion Based on MEMS Sensors: Fid-Bau Portal

Experimental Characteristics of Bolt-Reinforced Slope Motion Based on MEMS Sensors

Li, Wen-long / Gao, Yan / Yuan, Quan / Wu, Zhiyi

Abstract Landslide can seriously endanger people’s life and hinder the development of national economy. With the rise and development of MEMS (Micro-electro mechanical system) technology, MEMS sensors with the advantages of small size, low cost and high precision quickly stand out from the conventional monitoring methods. In this paper, based on MEMS sensors, a model test was designed to explore the sliding characteristics and the reinforcement effect of bolts in slope. Two series of experimental tests with different slope angles of 45° and 50° reinforced by bolts were carried out. The landslide was triggered by simulated rainfall. MEMS sensors were setup in the slope to capture the acceleration, angular velocity and angle of slope sliding in real-time wirelessly and continually. The research shows that: when the slope angle was 45°, only creep was observed; the acceleration and angle in the interior, bottom and surface of slope indicated by MEMS sensors were gradually changed while almost no change in the rear of the slope. When the slope angle increased to 50°, the acceleration and angle of slope in multi points were also gradually changed before the slope failure, especially in the bottom and the surface of the slope. Such fact indicates that MEMS sensors can play a certain role in landslide early warning; when the slope failed, the acceleration and angle in the surface and bottom of the slope were suddenly changed while small variations in the rear of the slope and almost no change inside of the slope. MEMS sensors can realize low-cost and high-precision continuously real-time monitoring of the kinematic characteristics of the landslide, which plays a certain role in understanding and early warning of landslides.