摘要
"5.12"汶川大地震引发了大量的直接和次生地质灾害,其中由于地震造成的堰塞湖是一种典型的次生地质灾害。结合都江堰市白沙河无人区的3个堰塞湖(枷担湾、窑子沟和关门山)现场工程地质调查结果和区域内的工程地质条件,对堰塞湖的形成过程和现状进行相关分析,分析表明:堰塞湖是由于地震引发的山体滑坡堵江而形成的,由于山体滑坡方量大,迅速从河谷一侧冲向另一侧,因而形成了一侧高、另一侧低的堰塞坝体型。然后对堰塞坝的渗透稳定性和库岸边坡稳定性进行了分析,结合现场堰塞湖的应急处理措施,给出了白沙河无人区3个堰塞湖的后续治理建议。在治理枷担湾堰塞湖和窑子沟堰塞湖的同时,对关门山堰塞湖也应进行相应处理。
Barrier lakes caused by Wenchuan earthquake is a typical secondary geological disasters.Based on the site engineering geological findings and regional engineering geological conditions of three barrier lakes of Jiadanwan,Yaozigou,and Guanmenshan,located in Baisha river no-man＇s land,the formation and status of the barrier lakes,were analyzed.The results showed that barrier lake are a result of the earthquake triggered landslides walling up river,due to landslide volume is huge,and quickly dashed from the side to the other side of the valley,creating a barrier lake with one high side and another low side.Then the seepage stability of barrier lake dam and the slope stability of reservoir banks were analyzed,combined with the scene emergency treatment measures of the barrier lake.Some recommendations for dealing with the three barrier lake were put forward.The Jiadanwan barrier lake and Yaozigou barrier lake should be treated,at the same time the Guanmenshan barrier lake should also be corresponding treatment.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2009年第3期102-108,164,共8页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(50739002)
关键词
工程地质
汶川大地震
工程地质力学
地质灾害
堰塞湖
安全评价
engineering geology
Wenchuan Earthquake
engineering geo-mechanics
geological hazards
barrier lake
safety evaluation
