【摘要】 分析了小湾水电站紧临坝基上游侧的饮水沟左岸堆积体的结构特征和可能的变形失稳形式, 重点介绍堆积体前期施工中采取的削坡减载、预应力锚索加固措施,以及2003年底到2004年初堆积体发生整体性向下蠕动后采取的上部开挖护坡,中下部锚索锚固,下部抗滑结构支挡、分层系统排水等综合措施。监测结果表明,综合加固措施实施后,堆积体边坡变形得到了有效控制,已处于稳定状态。更多还原

【Abstract】 For the deposit body on the left bank of watering gully near the upper dam foundation of the Xiaowan Hydropower Station, an analysis was performed of the structural characteristics and forms of deformation and instability that might occur, with emphasis placed on a series of reinforcement measures adopted at early stage of construction, such as slope cut to reduce the self-weight and pre-stressed rock anchor installation, as well as some comprehensive measures, including rock facing excavation at upper part for slope protection, rock anchor installation on the middle and lower parts, and anti-slide pile supporting and layered drainage system for the lower part, which were adopted from the end of 2003 to the early of 2004 to mitigate the downward integral creep deformation of the deposit body. The monitoring data show that the comprehensive measures effectively control the deformation of the deposit body and make it in steady state.更多还原