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Abstract

Coal strata feature soft lithology, low strength and easy softening under contact with water. During the subgrade excavation, the slopes of the coal strata often form a potential slip surface, which can control the stability of the overall slope. By taking the K132 landslide of Longchuan-Huaiji Expressway as an example, this paper comprehensively determined the characteristics of the landslide in coal strata, especially the characteristics of slip surfaces, by adopting the high-density resistivity and deep-hole displacement monitoring methods and combining geological drilling. The stability analysis results show that the carry-over factor method and Geoslope analysis can calculate the residual sliding force of the landslide and predict the slope stability. After a combination of emergency treatment and permanent treatment measures, the landslide mass in coal strata remains its stability after undergoing the largest rainfall in the last 20 years.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.007

First Page

37

Last Page

44

Submission Date

March 2025

Reference

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