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Abstract

A loose deposit slope is a special kind of rocky slope, whose material composition is characterized by nonlinearity, nonhomogeneity, and discontinuity, and China is a country with a high incidence of earthquakes, so the stability problem of loose deposit slope is particularly prominent. In this paper, the numerical simulation of the actual loose deposit slope MK0 + 455 of Ya’an–Kangding Expressway was carried out by using the particle flow code (PFC) to analyze its mechanical behavior and dynamic characteristics under seismic loading and reveal the progressive damage mechanism of the loose deposit slope. The results show that under seismic loading, the progressive damage of the loose deposit slope is mainly divided into the loosening and landslide of the loose deposit accumulation layer, as well as the cohesion damage and fissure development of the bedrock layer; the progressive development of the cohesion state and the fissure distribution of the loose deposit slope is related to time and space. Through the analysis of the time-range change of the void rate, strain rate, and kinetic energy, a preliminary summary of progressive damage characteristics of loose deposit slopes was provided.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.003

First Page

15

Last Page

21

Submission Date

May 2025

Reference

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