【摘要】 针对西南某大型水电站高达近106m的人工进水口垂直高边坡,通过现场跟踪施工的地质调查工作,系统研究了复杂地质条件和高地应力环境下岩石高边坡大坡比、强开挖所表现的变形响应,揭示了此类边坡变形响应的基本规律及特殊表现。研究表明:高边坡开挖过程中,边坡的变形与开挖过程有较强的同步性。变形主要受开挖卸荷影响,随着开挖的进行,坡体的变形随开挖面的远离表现出总体衰减,最终稳定的响应特征。变形可归纳为3种性质,即浅表松弛型、协调渐变型和回弹错动型,总体以浅表松弛型为主等。更多还原

【Abstract】 Through the abundant geological investigation of construction tracing in situ, the intake slope with vertical height of 106 m at a large hydropower station in Southwest China. the deformation of the high rock slope with great gradient is studied under the conditions of complex geology and high in-situ stress. Through systematical study, the basic laws and special characteristics of its deformation responses are acquired and classified as follows: ①During the slope excavation, it is found that there is strong synchronism between the slope deformation and its excavation process. ②The slope deformation is mainly influenced by excavation. ③The slope deformation generally is weakening with the distance between the excavation plane and the monitoring position, whose responding features of ultimate stability have three stages; that is, rapid increase stage of deformation, slow enhancing stage and the stable stage. ④The high slope deformation can be classified into 3 types, the shallow surface relaxation, the harmonized gradual change and rebound fluctuation. The main one is the shallow surface relaxation.更多还原