云南鲁甸地震红石岩堰塞湖右岸特高边坡综合监测及变形特征分析

鲁甸M_S6.5地震诱发红石岩右岸发生超大规模崩塌,并形成罕见的634 m特高崩塌边坡,严重影响后续堰塞体整治工程的安全。在现场特高边坡工程处置的基础上,提出了基于GNSS,多点位移计和锚索测力计的综合监测方法和技术。现场监测结果表明,经过工程处置的边坡,在监测期内,表面和深部变形缓慢且较小,坡体内没有发生明显的应力增高,边坡整体处于基本稳定-稳定状态。由于该山体受到震损后,岩体裂隙和后缘地表裂缝较多,后续应持续加强时实监测和预警工作。研究成果对于下部堰塞体整治工程以及后期堰塞体作为永久挡水建筑物的安全性具有重要意义,同时为类似工程提供参考。

Comprehensive monitoring and deformation analysis of extra high slope on the right bank of Hongshiyan Dammed Lake in Ludian Earthquake

Ludian M_s6.5 earthquake induced a super large-scale collapse on the right bank of Hongshiyan, and formed a rare 634 m extra-high collapse slope, which seriously affected the safety of the subsequent weir body treatment project. Based on the disposal of extra high slope, the comprehensive monitoring method and technology based on GNSS, multi-point displacement meter and anchor cable dynamometer are proposed. The field monitoring results show that the surface and deep deformation of the slope is slow and small during the monitoring period, and there is no obvious stress increase in the slope body, and the slope is basically stable-stable. Since there are many cracks in the rock mass and the surface cracks in the back edge of the mountain after the earthquake damage, the on-line monitoring and early warning work should be strengthened. The research results are of great significance for the lower weir body regulation project and the safety of the later weir plug body as a permanent water retaining structure, and provide reference for similar projects.