Experimental Study on the Failure Modes of Reinforced Loess Slopes with Frame Pre-stressed Anchors under Rainfall Influence

DOI

10.2991/978-94-6463-435-8_8How to use a DOI?

Keywords

Rainfall Influence; Frame Pre-stressed Anchors; Loess Slope; Failure Modes; Model Experiment

Abstract

The stability of loess slopes reinforced with frame pre-stressed anchors is often compromised under the influence of rainfall, yet the destabilization modes and triggering factors remain unclear. To address this issue, indoor model experiments were conducted under simulated rainfall conditions, monitoring parameters such as slope moisture content to analyze the failure modes of loess slopes reinforced with frame anchors during rainfall. The results indicate rainwater infiltration increases the volumetric water content and pore water pressure of the slope, decreases the matrix suction, and decreases the migration rate of the wetting front. The axial force of the bolt increases linearly and then decreases, and finally remains stable. The axial distribution pattern of the bolt axial force has not changed fundamentally. A significant correlation between slope instability and the rainfall infiltration process, along with the resulting parameter changes. The post-reinforcement evolution of slope cracks is characterized by small cracks, followed by transverse cracks penetrating the rear edge, and longitudinal shear cracks in the middle of the slope. The failure mode of the reinforced slope shifts from deep-seated landslide before reinforcement to erosion-induced gully formation after reinforcement. This includes shoulder erosion, toe erosion, development of rear-edge cracks, potential sliding surfaces, and gully formation. Preventive measures are proposed to provide references for the design and disaster prevention of slope reinforcement in the northwest region.

Copyright

© 2024 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  - Yanpeng Zhu
AU  - Ao Wang
AU  - Anping Huang
AU  - Linping Wu
AU  - Dong Cheng
PY  - 2024
DA  - 2024/06/13
TI  - Experimental Study on the Failure Modes of Reinforced Loess Slopes with Frame Pre-stressed Anchors under Rainfall Influence
BT  - Proceedings of the 2024 5th International Conference on Civil, Architecture and Disaster Prevention and Control (CADPC 2024)
PB  - Atlantis Press
SP  - 49
EP  - 63
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-435-8_8
DO  - 10.2991/978-94-6463-435-8_8
ID  - Zhu2024
ER  -