Reactivation Characteristics and Failure Mechanism of the Hongyan landslide

DOI

10.2991/978-94-6463-946-9_21How to use a DOI?

Keywords

Ancient landslide; Reactivation; Excavation; Stratified Structure; Failure Mechanism

Abstract

This paper studies the Hongyan landslides with complex reactivation mechanisms induced by human engineering activities. Through field investigation, drilling, in site monitoring and numerical simulation, the reactivation characteristics and instability mechanism of the Hongyan landslide were systematically studied. The results show that the regional lithology, topographic characteristics, geological structure and engineering activities have a certain promoting effect on the reactivation of the Hongyan landslide; the existence of clay in the sliding body and the layered structure in the sliding body enhances the sensitivity of the slope. The free surface of the slope creates favorable conditions for the subsequent deformation of the sliding body; the sliding body is mainly the ancient landslide accumulation body, and the layered structure before the slope sliding is retained in the ancient landslide accumulation body; the excavation of the slope reduces the anti-sliding force and changes the free surface conditions, which directly leads to the reactivation of the landslide; during the deformation process, due to the change of the free surface conditions, the sliding body shows the characteristics of counterclockwise deflection. The reactivation of the Hongyan landslide is the result of the interaction of multiple inducing factors, and its instability mechanism is complex. This study is of great significance for the hazard evaluation of such ancient landslides.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Suichuan Ren
AU  - Ran Tang
AU  - Huajin Li
PY  - 2026
DA  - 2026/01/04
TI  - Reactivation Characteristics and Failure Mechanism of the Hongyan landslide
BT  - Proceedings of the 11th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2024)
PB  - Atlantis Press
SP  - 167
EP  - 173
SN  - 2352-5428
UR  - https://doi.org/10.2991/978-94-6463-946-9_21
DO  - 10.2991/978-94-6463-946-9_21
ID  - Ren2026
ER  -