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Published in:
2018 | OriginalPaper | Chapter
Progressive Failure Mechanism Analysis of Loose Media Slope Under Seismic Loading
Authors : Meng-xi Zhang, Qian-qi Liu, Qun Zhou, Qiang Chen, Dong Wang
Published in: Proceedings of GeoShanghai 2018 International Conference: Fundamentals of Soil Behaviours
Publisher: Springer Singapore
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Abstract
The loose media slope is a special kind of rock slope which have characteristic of high intensity, usually accumulated by earthquakes. Substances of the loose slope have some properties, such as nonlinear, non-homogeneous and non-continuous. However, in the southwest of China, the frequent incidence of earthquake makes the problem of stability for loose media slopes prominent.
In this paper, particle flow code (PFC) was applied to effectively simulate the loose media slope which is located in Ya-Kang highway of MK0+455 according to the analysis of field investigation. Results show that the progressive failure process of loose media slope under seismic loading is consists of three main aspects. First is the process of loose and landslide that happened in the accumulation layer. Second, some loose rocks fractured during this process because of collision and friction. Third, bond failure and crack development that happened inside the loose media slope. Furthermore, the result found that the bond failure process and crack development process have remarkable spatial and temporal characteristics. Obviously, the motion is weakened inside the loose media slope especially when rocks sliding after seismic loading.