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首页> 外文期刊>Polish Journal of Environmental Studies >Stability Analysis of Dangerous Rockmass Considering Rainfall and Seismic Activity with a Case Study in China's Three Gorges Area
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Stability Analysis of Dangerous Rockmass Considering Rainfall and Seismic Activity with a Case Study in China's Three Gorges Area

机译：考虑降雨和地震活动的危险岩体稳定性分析-以中国三峡地区为例

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摘要

Rainfall and seismic activity have significant influence on the stability of dangerous rockmass. In this paper, the dangerous rockmasses are classified into three instability types according to the failure modes: sliding, falling, and toppling. The discrete element method (COMSOL) was carried out to investigate the stability of three different rockmass types. In the numerical simulation, three load combinations were applied to the numerical model: 1) rockmass weight, 2) rockmass weight + fissure water pressure, and 3) rockmass weight + fissure water pressure + earthquake force. The results show that rainfall and seismic activity play important roles in rockmass stability and the displacement and principal stress of the rockmass are influenced obviously. Wangxia dangerous rockmass in the Great Three Gorges area was selected as a case study, and its stability was analyzed by geological investigation, numerical simulation, and static calculation methods. The results show that there is a high risk that Wangxia dangerous rockmass would lose stability when rainfall season comes and seismic activity happens. A blast was conducted to remove this dangerous rockmass and an SNS net design was proposed to intercept distributed blocks based on rockfall trajectory simulation. The parameters needed in the rockfall simulation program were obtained by laboratory and field tests. Final application proved that the designed treatment is efficient and no damage was caused by the distributed blocks. The whole research may provide a useful reference to similar engineering projects in the future.
机译：降雨和地震活动对危险岩体的稳定性有重大影响。本文将危险岩体根据破坏模式分为三种失稳类型：滑动，坠落和倾覆。进行离散元方法（COMSOL）来研究三种不同岩体类型的稳定性。在数值模拟中，将三种载荷组合应用于数值模型：1）岩体重量，2）岩体重量+裂隙水压力，以及3）岩体重量+裂隙水压力+地震力。结果表明，降雨和地震活动对岩体的稳定性起着重要的作用，岩体的位移和主应力受到明显影响。以大三峡地区的望厦危险岩体为例，通过地质调查，数值模拟和静态计算方法对其稳定性进行了分析。结果表明，降雨季节来临，地震活动发生时，王霞危险岩体极有可能失去稳定性。进行了爆炸以清除该危险的岩体，并提出了SNS网络设计，以基于落石轨迹模拟来拦截分布的块体。落石模拟程序中所需的参数是通过实验室和现场测试获得的。最终应用证明了设计的处理方法是有效的，并且分布式块不会造成损坏。整个研究可能为将来的类似工程项目提供有益的参考。

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