In recent years, landslide lake disasters occur frequently in southwest mountainous areas of China. Considering the influence of dam size and discharge channel location, three large-scale field tests were carried out in a natural river to study the failure process and mechanism of non-cohesive soil landslide dam, and the process and mechanism of non-cohesive landslide dam breach were analyzed. The results show that the dam size and discharge channel location have a significant influence on the breach mechanism of the landslide dam. The dam failure process can be divided into three stages: the initiation stage, the development stage and the failure stage. When the discharge channel is located close to the bank, the width of the breach is smaller, and the volume of the residual dam body is larger. The more stable the dam body is, the longer the breach process time is, and the smaller the peak discharge is. This study can provide a scientific reference for the emergency disposal and risk assessment of landslide dam.

中文翻译：

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非粘性滑坡坝漫顶破坏机理大型现场试验研究

近年来，我国西南山区滑坡湖泊灾害频发。考虑大坝尺寸和泄洪渠道位置的影响，在某天然河流中进行了3次大型现场试验，研究了非粘性土滑坡坝的破坏过程和机理，以及非粘性土滑坡坝的破坏过程和机理。违规进行了分析。结果表明，坝体尺寸和泄洪道位置对滑坡坝体的溃坝机理有显着影响。大坝破坏过程可分为三个阶段：启动阶段、发展阶段和破坏阶段。当泄洪道靠近堤岸时，溃口宽度较小，剩余坝体体积较大。坝体越稳定，突破处理时间越长，峰值放电越小。该研究可为滑坡坝的应急处置和风险评估提供科学参考。