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对迪那某桥梁旁的危岩体进行勘查,在分析其地质环境条件下查明了该处危岩体的发育分布特征、裂隙发育特征和其形成的主导因素和诱发因素,在现场勘查和室内试验取得的岩体物理力学参数的基础上对其在天然状态、暴雨状态和地震状态下以及不同位置后缘裂隙进行了数值模拟计算,定量地对该危岩体进行了稳定性评价。结果显示:在目前状态下距陡崖面35m范围内处于欠稳定状态,距陡崖面42m处为基本稳定状态,在暴雨工况及地震工况下,距陡崖面35m范围内处于不稳定-欠稳定状态,距陡崖面42.0m处为基本稳定-不稳定状态。并根据研究结果对该危岩体提出了预应力锚索加固和削坡加载、加桩抗滑的防治对策。
The dangerous rock mass near a certain bridge in Dinag exploration is investigated, the development and distribution characteristics of the dangerous rock mass in this area are identified under the analysis of its geological and environmental conditions, the development characteristics of the fractures and the dominant factors and triggering factors of its formation. Based on the physical and mechanical parameters of the rock mass obtained from the laboratory tests, the numerical simulation of the fractures in the natural state, the rainstorm state and the earthquake state, as well as in the different locations are carried out. The stability of the rock mass is quantitatively evaluated. The results show that under the current condition, the rockburst is not stable within 35m from the face of the cliff and 42m away from the face of the cliff is basically stable. Under the condition of heavy rain and earthquake, it is unstable within 35m from the face of the cliff - Unstable state, basically stable at 42.0m from the cliff surface - unstable state. Based on the research results, the prevention and cure measures of prestressed anchorage cable reinforcement and cutting slope loading plus anti-skidding pile are put forward.