Prof. Deren Liu Profile

Prof. Deren Liu

at Lanzhou Jiaotong Univ

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Proceedings Article | 10 November 2021 Paper

Study on stability calculation of overloaded abandoned dreg site based on particle flow theory

Yuanbo Zhang, Deren Liu, Shuochang Xu, Donglin Yao

Proceedings Volume 12050, 120500U (2021) https://doi.org/10.1117/12.2613986

KEYWORDS: Particles, Landslide (networking), Analytical research, Chemical elements, Failure analysis, Safety, Numerical simulations, Computer simulations, Soil science, Software development

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With the rapid development of traffic engineering, the number of large-scale tunnel projects is increasing, and the scale of abandoned slag accumulation caused by tunnel excavation is becoming bigger. In order to accumulate as much abandoned slag as possible, many abandoned dreg sites have the phenomenon of overload storage capacity, and the slope of the spoil yard has many hidden dangers due to its own geophysical and mechanical properties, local geological conditions and design parameters. In this paper, based on the particle flow analysis method of discrete element method, the slope deformation process of the railway tunnel abandoned slag was simulated under two conditions of design storage capacity and overload storage capacity. The slope slip development and landslide instability characteristics under two conditions were compared and analyzed, and the stability of the abandoned dreg site under different storage capacity was studied. The calculation results show that the slope sliding range of the abandoned dreg site under the overload storage capacity expands, the slip particles increase and the slip distance grows. The maximum sliding distance of the waste slag particles is 21.05m, the landslide failure time is 3.0 X 10⁶, the horizontal thrust formed by the waste slag behind the dam is 3.4 times of the design condition, and the stability of the abandoned dreg site slope decreases. The research results can provide a theoretical basis for the landfill and stability analysis of abandoned dreg sites.

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