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渝利铁路青石岩段为深切河谷型边坡,该边坡表部岩体在风化缷荷作用下结构复杂且稳定性差。此外,浅表层岩体在降雨、地震及工程开挖等影响下,局部已经出现了不同模式不同规模的变形失稳现象,严重影响工程建设和运营期间的安全。因此,本文根据边坡岩体结构特征及风化缷荷特征等工程地质条件,结合不同失稳模式的危岩体,提出了相应的稳定性评价理论和方法。最后,针对不同规模和不同稳定状态下的危岩体提出了有效的防治措施。
The Qingshiyan section of the Yu-Li railway is a deep valley-type slope, and the rock mass on the surface of the slope has complicated structure and poor stability under the action of weathering load. In addition, under the influence of rainfall, earthquake and excavation, the deformation instability of different modes and scales has appeared locally, which seriously affects the safety during construction and operation. Therefore, based on the engineering geological conditions such as the structural characteristics of rock mass and the characteristics of weathering load, combined with the dangerous rock mass with different instability modes, the corresponding stability evaluation theories and methods are proposed. Finally, we put forward effective control measures for the dangerous rock mass under different scales and different steady states.