格宾-柔性网泥石流组合拦阻结构模型试验研究*

引用新型的柔性拦阻网和格宾结构被认为是泥石流治理工程的新趋势。基于泥石流模型试验,设置了一道格宾和一道柔性网,组成了格宾-柔性网组合结构,通过分析拦阻结构迎水面的冲击力和被拦阻物源的级配组成,结果表明:(1)泥石流格宾-柔性网组合的拦阻效果明显,既具有快速排水的优点,也具有将固体物质拦截的特点;(2)拦阻结构的孔隙率对被拦截物源的粒径有分选作用,根据不同的泥石流类型,可以调整拦挡结构的孔隙率,以达到最好的拦挡效果;(3)拦阻结构底部受力比较大,冲击力从底部向上逐渐减小。第一道拦阻结构(柔性网)上不同位置处的冲击力相差最大,第二道拦阻结构(格宾)不同位置冲击力相差较小。

Research on Gabion-Flexible Web Structure of Debris Flow Model Test

The Gabion and the flexible net are considered to be the new trend in the landslide control project. Based on debris flow model test, this paper gives up one guest and one flexible net, which are formed by guest-flexible composite structure. Through analysis the following conclusions are drawn: (1) The hindering effect of Gabion-flexible net structure of debris flow is obvious, it not only has the advantages of rapid drainage, but also solid material can be blocked. (2) The porosity of blocked structure has sorting effect for source of debris flow. According to the difference types of debris flow, blocked structure can be adjusted to achieve the best block effect. (3) The stress at the bottom of hindered structure is larger. The impact gradually decreases from the bottom to the top.The gap of the impact in the different positions of the first hindered structure (flexible net) is very wide. The gap of the impact on the different positions of the second hindered structure (Gabion) is very small.