Study on structural characteristics of expansive soil slope in transmission line engineering

DOI

10.2991/978-94-6463-404-4_25How to use a DOI?

Keywords

expansive soil; drying-wetting cycles; shear strength; microstructure; slope stability

Abstract

Expansive soil has significant properties such as expansion and contraction, fracture and water strength attenuation, which leads to deformation and instability of expansive soil slope, which seriously threatens the safety construction and normal operation of transmission line towers along the line. The characteristics of expansive soil during drying-wetting cycles play an important role in slope stability analysis. Using shear tests and scanning electron microscopy tests, the changes in shear strength and microstructure characteristics of expansive soil were studied. The failure mode of expansive soil slopes under dry wet cycling was analyzed using Midas software. The research results indicate that the drying-wetting cycles have a significant impact on the cohesion of expansive soil, but have a small impact on the internal friction angle. As the number of drying- wetting cycles increases, the micro surface structure and surface-edge structure of expansive soil decrease, and the changes in the structure of expansive soil lead to a decrease in the strength of expansive soil. The slope failure mode is traction shallow failure.

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  - Haodong Qin
AU  - Wenrong Li
AU  - Xiaoqing Wang
AU  - Yuqin Liao
AU  - Yueguang Yang
AU  - Jiayi Zhou
AU  - Junlan Huang
AU  - Qinghua Wu
PY  - 2024
DA  - 2024/04/29
TI  - Study on structural characteristics of expansive soil slope in transmission line engineering
BT  - Proceedings of the 2024 3rd International Conference on Structural Seismic Resistance, Monitoring and Detection (SSRMD 2024)
PB  - Atlantis Press
SP  - 251
EP  - 265
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-404-4_25
DO  - 10.2991/978-94-6463-404-4_25
ID  - Qin2024
ER  -