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首页> 外文期刊>Frontiers of structural and civil engine >Evaluation of potential failure of rock slope at the left abutment of Jinsha River Bridge by model test and numerical method
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Evaluation of potential failure of rock slope at the left abutment of Jinsha River Bridge by model test and numerical method

机译：用模型试验和数值方法评价金沙江大桥左岸岩质边坡潜在破坏

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摘要

Jinsha River Bridge is located on Tiger Leaping Gorge town, China. The left bank slope composes of moderately thick layer of slate overlain by schistose basalt, and where rocks are controlled by two sets of joint planes. To evaluate the stability of the rock slope under bridge foundation, model test and calculation model based on the geological parameters and the slope stability was simulated and analyzed using Universal Distinct Element Code (UDEC) and Finite Element Mehod (FEM). According to model test, failure mainly initiated at the toe with shear movement along the joint planes, eventually resulting in the sliding along the slope surface and formation of tension crack at the crest of the model. This result coincide with the UDEC model, which shows that slope surface will produce loosening damage and slipping expected along the joint planes under different loading conditions. Moreover, the result of FEM analysis indicates that the rock mass under the main pier has potential shear failure region. So, the bridge foundation should be strengthened to prevent the slope failure under external forces.
机译：金沙江大桥位于中国虎跳峡镇。左岸斜坡由片状玄武岩覆盖的中等厚度的板岩层组成，岩石由两组联合平面控制。为了评价桥梁基础下岩质边坡的稳定性，采用通用离散元法（UDEC）和有限元方法（FEM）对基于地质参数和边坡稳定性的模型试验和计算模型进行了仿真分析。根据模型测试，破坏主要发生在脚趾处，并沿接合面进行剪切运动，最终导致沿坡面滑动并在模型的顶峰处形成张力裂纹。该结果与UDEC模型相吻合，该模型表明，在不同的载荷条件下，坡面会产生沿连接面的松弛破坏和滑动。而且，有限元分析的结果表明，主墩下的岩体具有潜在的剪切破坏区域。因此，应加强桥梁基础，以防止外力作用下的边坡破坏。

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