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

Yuanbo Zhang; Deren Liu; Shuochang Xu; Donglin Yao

doi:10.1117/12.2613986

10 November 2021 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, International Conference on Smart Transportation and City Engineering 2021; 120500U (2021) https://doi.org/10.1117/12.2613986
Event: 2021 International Conference on Smart Transportation and City Engineering, 2021, Chongqing, China

Abstract

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.

Citation Download Citation

Yuanbo Zhang, Deren Liu, Shuochang Xu, and Donglin Yao "Study on stability calculation of overloaded abandoned dreg site based on particle flow theory", Proc. SPIE 12050, International Conference on Smart Transportation and City Engineering 2021, 120500U (10 November 2021); https://doi.org/10.1117/12.2613986

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KEYWORDS

Particles

Landslide (networking)

Analytical research

Chemical elements

Failure analysis

Safety

Computer simulations

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