摘要
雅砻江中游某特大型滑坡位于拟建水电站的上坝址和中坝址之间,滑坡规模巨大,约3662万m3,目前坡体上有长达两百余米的长大裂缝,其对拟建工程具有重要的影响。现在深入调查滑坡基本特征的基础上,结合滑坡的发育条件分析了古滑坡的成因机制为滑移-拉裂型,现今的复活机理为蠕滑-拉裂型,进而探讨了复活区控制范围,最后结合滑坡的地貌特征、物质组成、结构特征和变形特征将滑坡分为3个亚区,并进行分区评价,定性分析和定量计算均表明:滑坡前部的C区在天然工况下处于基本稳定状态,暴雨工况下处于极限平衡状态,需采取一定工程措施方能保持工程安全,其成果可为拟建工程提供重要参考。
A large landslide in Yalong River which was in the middle of two dam sites.As the landslide covered a huge of 3 662 × 104m3,and currently cracks with length of over 200 meters,which had an important impact to the proposed hydropower.Based on the investigated basic characteristic of landslide,we analyzed the formation mechanism of the ancient landslide and the deformation mechanism of the present combined with the conditions of landslide,and explored the range of deformation.Finally,we divided the landslide into three sub-areas,according to topography characteristics,material composition,structural characteristics and deformation characteristics of the landslides,and made the partition evaluation.Qualitative analysis and quantitative calculations showed that：the c area in the front of landslide was stable in natural condition,and which is the ultimate state in rain conditions,it was necessary to take engineering measures,the results could provide important reference for the proposed project.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第5期92-94,166,共4页
South-to-North Water Transfers and Water Science & Technology
