Analysis of the Influence of Umbrella Anchors on the Effectiveness of Micropile Reinforcement in Channel Slopes

DOI

10.2991/978-94-6463-435-8_42How to use a DOI?

Keywords

Micro pile; Umbrella anchor-micro pile joint; Anti-sliding stability; Landslide deformation

Abstract

The construction of micropiles is convenient, but the slip resistance is limited and the deformation control ability is insufficient, and the use of umbrella anchors and slip-resistant piles joint reinforcement is the solution. In order to study the enhancement effect of umbrella anchors on the reinforcing effect and deformation control ability of micropiles, an indoor model test of umbrella anchors-micropile joint reinforcement of landslides was carried out, and the top settlement and horizontal displacement of umbrella anchors-micropiles during graded load holding were tested by adopting the graded loading method, and a finite element analysis model was established to analyze the enhancement effect of umbrella anchors on the reinforcing effect of micropiles. The results show that: compared with the single reinforcement of mini-pile, the joint reinforcement of umbrella anchor and mini-pile can significantly enhance the stability of slope resistance by more than 20%; the horizontal displacement of the pile top shows a slow increase with the increase of load, and then grows rapidly, and the joint reinforcement of umbrella anchor-micropile can reduce the horizontal displacement of the pile top by 50% under the same loading condition; after the umbrella anchor combined with the mini-pile reinforcement, the maximal moment of the body of the mini-pile decreases and the maximal moment of the body of the mini-pile is directed to the steel strand at the point of maximum bending moment. The maximum bending moment is shifted to the strand action point and the value of maximum bending moment is reduced. The zero point of shear force of the miniature pile body is shifted downward away from the strand action point, and the maximum shear force value is reduced. The research results provide basic support for the popularization and application of umbrella anchor in channel slope reinforcement.

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  - Xiyuan Wang
AU  - Xianzhen Cao
AU  - Xi Wang
AU  - Yilin He
AU  - Yong Xiong
PY  - 2024
DA  - 2024/06/13
TI  - Analysis of the Influence of Umbrella Anchors on the Effectiveness of Micropile Reinforcement in Channel Slopes
BT  - Proceedings of the 2024 5th International Conference on Civil, Architecture and Disaster Prevention and Control (CADPC 2024)
PB  - Atlantis Press
SP  - 394
EP  - 405
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-435-8_42
DO  - 10.2991/978-94-6463-435-8_42
ID  - Wang2024
ER  -