Uplift Testing of Rock Anchors for Transmission Towers in Basaltic Formations of Inner Mongolia

DOI

10.2991/978-94-6463-932-2_15How to use a DOI?

Keywords

western Inner Mongolia; single anchor foundation; ultimate uplift capacity; failure mode

Abstract

To address the uncertainty regarding the applicability of rock bolt foundations in the vesicular basalt formations of the Ulanqab-Hohhot region in Western Inner Mongolia, this study selected a typical site with highly to moderately weathered basalt. Ten in-situ static uplift load tests on single rock anchors were conducted to analyze their bearing capacity and failure modes. The results indicate that: The load-displacement curves of single anchors in basalt predominantly exhibit a hardening behavior. The primary failure modes include fracture of the anchor bar, pullout of the anchor-grout column, and rock mass shear failure, with anchor bar fracture being the dominant mode. The uplift bearing capacity generally increases with greater embedment depth; however, it stabilizes and shows no further increase once the depth reaches 3 m. The ultimate uplift capacity significantly increases with higher anchor bar strength and larger diameter. Thus, high-strength, large-diameter deformed steel bars are recommended. The vesicular structure of the basalt exhibits no significant influence on the uplift bearing capacity. This demonstrates the applicability of rock bolt foundations in the basalt formations of Western Inner Mongolia.

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  - Getu Niu
AU  - Wei Li
AU  - Yin Man
AU  - Xin Zhang
AU  - Rengaowa Sa
AU  - Duo Li
AU  - Jianchun Nie
AU  - Yifeng Yang
PY  - 2025
DA  - 2025/12/22
TI  - Uplift Testing of Rock Anchors for Transmission Towers in Basaltic Formations of Inner Mongolia
BT  - Proceedings of the 2025 2nd International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2025)
PB  - Atlantis Press
SP  - 130
EP  - 141
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-932-2_15
DO  - 10.2991/978-94-6463-932-2_15
ID  - Niu2025
ER  -