Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
Beijing Key Laboratory of City Integrated Emergency Response Science, Tsinghua University, Beijing 100084, China.
Sensors (Basel). 2021 Mar 29;21(7):2373. doi: 10.3390/s21072373.
Acoustic emission (AE) monitoring has become an optional technology to quantify slope deformation. However, there are still challenges in developing generic AE interpretation strategies. Dynamics and kinematics models are two physical methods for analysing slope stability, which appear to improve the interpretability of AE monitoring data. The aim of this study is to explore the change patterns and interrelations of dynamics, kinematics, and AE measurements using a model test and physical analysis, to further understand the development process of a progressive landslide. A model test is designed based on the kinematics model of landslide three-stage deformation. An equation between factor of safety (FoS) and thrust is proposed based on the mechanical model of a landslide test. There is a clear correspondence between the displacement and inverse velocity during the deformation-controlled process. Relationships are uncovered between the thrust and FoS as well as the thrust and acceleration. As a characteristic parameter of AE, ring down count (RDC) is able to quantify the deformation process of the soil slope. Moreover, acceleration and RDC can reflect the sudden change of the slope state and, hence, can be effective indicators for the early warning in a progressive landslide.
声发射（AE）监测已成为量化边坡变形的可选技术。然而，开发通用 AE 解释策略仍然存在挑战。动力学和运动学模型是分析边坡稳定性的两种物理方法，似乎可以提高 AE 监测数据的可解释性。本研究旨在通过模型试验和物理分析探讨动力学、运动学和 AE 测量的变化模式和相互关系，以进一步了解渐进式滑坡的发展过程。基于滑坡三阶段变形的运动学模型设计了一个模型试验。根据滑坡试验的力学模型，提出了安全系数（FoS）和推力之间的方程。在变形控制过程中，位移和反向速度之间存在明显的对应关系。揭示了推力与 FoS 以及推力与加速度之间的关系。作为 AE 的特征参数，环形下降计数（RDC）能够量化土坡的变形过程。此外，加速度和 RDC 可以反映边坡状态的突然变化，因此可以作为渐进式滑坡的预警有效指标。
