生态袋护岸的设计要点探讨

通过算例探讨了生态袋在边坡稳定分析中的作用和水位波动区下满足局部稳定的生态袋最小尺寸,给出了生态袋安全分析方法。结果表明:生态袋能提高边坡的稳定,避免表层的浅层滑动,边坡稳定安全系数随着生态袋防护范围厚度的增加而增加; 生态袋的尺寸基本随河道流速的增长呈幂指数增长,对河道流速较为敏感;生态袋护岸抗滑移分析、抗倾覆分析和抗剪切分析计算公式简单直观,但技术参数和安全系数的取值是关键。

Discussion on Design Essentials of Ecological Bags in Revetment Engineering

The role of ecological bags in the slope stability analysis and the minimum size of ecological bags to meet the local stability under the water level fluctuation zone are discussed by a calculating example. The safety analysis method of ecological bags is given. The results show that ecological bags can improve the stability of slope and avoid the shallow sliding of surface layer. The safety factor of slope stability increases with the increase of the thickness of ecological bag protection range. The size of ecological bag increases exponentially with the increase of river velocity and is sensitive to the river velocity. The computational formulas of anti-slip analysis, anti-overturning analysis and anti-shear analysis are simple and intuitionistic, but the values of technical parameter and safety factor are the key.