摘要
基于汶川地震触发形成的唐家山堰塞湖泄流后残留的堰塞体,从堰塞体工程地质条件、"8.19"和"7.9"洪水等自然灾害对残留堰塞体影响等方面分析唐家山残留堰塞体现状。通过稳定性宏观判断与定量计算,研究了残留堰塞体的稳定性,提出了唐家山堰塞体综合整治与利用的思路。研究结果表明:残留的唐家山堰塞坝主要分布于泄流槽左岸,经历了多次自然灾害的影响,残留的堰塞坝整体稳定;现今泄流槽两岸特别是右岸仍分布有松散堆积物,天然状态基本稳定,但在持续降雨、地震和水流冲刷等状态下产生局部失稳可能性大。可结合水利工程,对堰塞坝特别右岸堆积的松散堆积物、泄流槽底板进行综合整治,保障堰塞坝安全。
Based on the remnant landslide dam of Tangjiashan dam lake formed by the Wenchuan earthquake,the engineering geological conditions of dams and the impact of natural disasters such as"8.19"and"7.9"floods on residual dams were analyzed.The remnant landslide dam stability was qualitatively and quantitatively analyzed.The idea of the comprehensive harnessing and development and utilization for the Tangjiashan landslide dam was proposed.The results shows that the remnant landslide dam is mainly distributed on the left bank of the chute.The remaining dam dams are generally stable after several natural disasters.Loose deposits are still distributed on both sides of the discharge chute,especially the right bank,which is basically stable.However,there is a high possibility of local instability under conditions such as continuous rainfall,earthquakes and water scouring.In order to ensure the safety of the dam,comprehensive treatment measures should be taken on the right bank of the barrier dam and the drainage channel,combined with Tanjiashan water conservancy projects.
作者
李青春
胡亚东
施裕兵
Li Qingchun;Hu Yadong;Shi Yubing(Power China Chengdu Engineering Corporation Limited,Chengdu 610072,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2020年第S02期993-998,共6页
Chinese Journal of Underground Space and Engineering
基金
国家重点研发计划(2018YFC1508506)
关键词
残余堰塞体
泄流槽
稳定性
唐家山
remnant landslide dam
chute
stability
Tangjiashan
作者简介
李青春(1983—),男,重庆合川人,高级工程师,主要从事岩土工程、地质灾害等领域的生产与科研工作。E-mail:52880335@qq.com
