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通过对溪洛渡水电站坝区浅表生变形破裂形迹空间发育规律及浅表生结构组合型式的调查 ,结合地质地貌演化机制分析 ,探讨了坝区浅表生改造的机制模式。研究表明 ,浅表生改造与河谷地貌演化密切相关 ,改造方式有垂向卸荷和侧向卸荷 2种 ;由缓倾角断裂构成的板裂状岩体结构对浅表生改造起了重要控制作用 ,浅表生结构的典型组合型式为由陡、缓倾角断裂组合形成的“阶梯状”回弹错动型式。该研究对认识河谷岩体的岩体结构特征具有重要意义
Through the investigation of the spatial development of superficial deformation and rupture of the shallow caisson in the dam area of the Xiluodu Hydropower Station and the analysis of the superficial structure combinations, the mechanism model of superficial transformation in the dam area is discussed with the analysis of the evolution mechanism of the geomorphology. The results show that the superficial transformation is closely related to the evolution of the valley landscape. There are two types of modification: vertical unloading and lateral unloading. The structure of the plate crack rock composed of the gently inclined faults plays an important role in superficial rehabilitation The typical combination of superficial structures is a “ladder-like” springback pattern formed by a combination of steep and gently dipping faults. This study is of great significance for understanding the structural features of rock mass in river valley