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首页> 外文期刊>Engineering Geology >Damage evolution and stability analysis of the Jianchuandong Dangerous Rock Mass in the Three Gorges Reservoir Area
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Damage evolution and stability analysis of the Jianchuandong Dangerous Rock Mass in the Three Gorges Reservoir Area

机译：三峡库区建钦东危险岩体损伤演化与稳定性分析

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摘要

To analyze the deformation mechanism and to evaluate the stability of a dangerous rock mass, we investigated the Jianchuandong Dangerous Rock Mass (JDRM) in the Three Gorges Reservoir area. By generalizing the JDRM mechanical model, we found that the damage and degradation of the base rock mass will eventually lead to its collapse. The weight of the upper rock mass and the periodic change in the reservoir water level result in a weakened and increasingly damaged base rock mass. Based on data from laboratory tests, we created constitutive damage models for the base rock mass under dry-wet conditions. Applying these models allowed us to quantify the damage and the stability of the submerged dangerous rock mass over time. In this new method, the effective axial pressure can be determined from the damage variables, and that pressure informs the stability of the dangerous rock mass. This new modeling technique was validated by the similarity between our calculated constraints on the effective axial pressure of the JDRM and the actual on-site pressure monitoring results. Furthermore, because our new methodology reveals that the JDRM will become unstable after two dry-wet cycles, we recommend that measures be taken to reinforce the JDRM as soon as possible.
机译：分析变形机制并评价危险岩石质量的稳定性，我们调查了三峡库区建筑危险岩体（JDRM）。通过概括JDRM机械模型，我们发现基础岩石质量的损坏和降解最终将导致其崩溃。上岩体的重量和储层水位的周期性变化导致弱化和越来越受损的基础岩体。基于来自实验室测试的数据，我们在干湿条件下为基础岩体产生了本构成的损伤模型。应用这些模型使我们能够随着时间的推移量化淹没危险岩体质量的损坏和稳定性。在这种新方法中，可以从损伤变量确定有效的轴向压力，并且该压力通知危险岩体的稳定性。通过我们计算的约束对JDRM的有效轴向压力和实际的现场压力监测结果之间的相似性验证了这种新的建模技术。此外，由于我们的新方法显示，在两次干湿循环后JDRM会变得不稳定，我们建议采取措施尽快加强JDRM。

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