泥石流拦挡坝破坏模式调查分析

Investigation and Analysis on Failure Mode of Dam

泥石流是一种常见山区自然地质灾害,在治理工程中泥石流拦挡坝应用较为广泛,拦挡坝经历过常年的水力冲刷和泥石流破坏后,很多挡坝均出现了不同程度地破坏,通过现场调查,对拦挡坝的破坏部位、破坏类型和破坏特征进行统计分析,对其破坏类型进行了分类,即根据破坏部位分为坝基破坏、坝肩破坏和坝体破坏;按破坏原因分为冲刷掏蚀破坏、渗透破坏、冲击破坏、滑动倾覆破坏和地震破坏,这些破坏类型中冲击破坏模式占比最大。

Debris flow is a common natural geological disasters.Dam experienced perennial hydraulic scour and debris flow damage,many have suffered different degrees of damage.Through field investigation,destructed site,failure types and failure characteristics of dam site,damage statistical analysis of failure types of debris flow dam is classified.According to the damaged part,it is classified as dam foundation damage,dam abutment damage and dam body damage.According to the cause of failure,it can be divided into scouring and erosion damage,seepage failure,impact damage,sliding overturning failure and earthquake damage.Impact failure mode is the largest.