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首页> 外文期刊>Bulletin of engineering geology and the environment >Study on the shear deformation of intralayer shear bands at the Baihetan hydropower station dam foundation
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Study on the shear deformation of intralayer shear bands at the Baihetan hydropower station dam foundation

机译：百六水电站坝基岩体剪切带剪切变形研究

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摘要

The engineering geological environments of the Baihetan hydropower station dam site are complicated due to the existence of columnar jointed basalt with faults and intralayer shear band structures. In the excavation process of the left dam foundation, relaxation and deformation of the columnar jointed basalt and the unloading shear deformation of the intralayer shear bands are both important engineering geological problems. Taking a typical intralayer shear band exposed during the excavation of the left dam foundation of the Baihetan hydropower station as an example, the unloading shear deformation of the intralayer shear band was investigated by in situ testing and numerical analysis in this study. The results confirmed that the unloading shear deformation of the intralayer shear bands can present an instability risk for the left dam foundation due to their poor mechanical strength and shearing damage. Therefore, a reinforcement measure of intralayer shear bands is critical for the stability assessment of similar structures.
机译：由于柱状连接玄武岩存在柱状玄武岩，白初水电站坝址的工程地质环境是复杂的故障和腔内剪切带结构的复杂性。在左侧坝基的挖掘过程中，柱状连接玄武岩的弛豫和变形以及腔内剪切带的卸载剪切变形是重要的工程地质问题。以诸如百六水电站的左侧坝基挖掘出来的典型的体内剪切带作为示例，通过本研究中的原位测试和数值分析研究了腔内剪切带的卸载剪切变形。结果证实，由于其机械强度差和剪切损坏，卸载挡泥带的卸载剪切变形可能为左坝基的不稳定风险。因此，腔内剪切带的增强措施对于类似结构的稳定性评估至关重要。

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