水平岩层软弱基座危岩体演化过程研究

以重庆市甄子岩29号危岩体为研究对象，基于现场调查和分析解剖，建立UDEC离散元数值计算模型，对其演化变形过程进行模拟分析。研究表明，在巨大的自重作用下，由于基座岩体岩质软，岩体较破碎，且基座外侧为直立的陡崖，具有完整的临空面，从而使基座岩体易发生压缩流变及剪切流变，进而使危岩体存在滑移垮塌的危险。

Research on evolution process of dangerous rock mass of soft foundation with horizontal stratum

In the case of No. 29 dangerous rock mass of Zhenziyan, based on the field investigation and analysis, UDEC discrete element digital calculation model is established and used to simulate and analyze the evolution process of the rock mass. The research shows that under huge self-gravity, the cliff outside the foundation is vertical and steep with free face, and the foundation rock mass is characterized as soft and fractured, so the compression rheology and shear rheology occurred, which would cause the shear failure of the foundation and increase the risk of rock collapse.