生态护坡是促进边坡生态恢复和减少地质灾害的主要技术措施。基于生态环境学理论和地质灾害防治理论,分析当前常用生态护坡类型的适应性,综合不同类型生态护坡的“固、保、透、滤、柔”等优点,针对开封段引黄灌渠多为硬质护坡的现状和砂质土的特性,因地制宜地提出适合灌区渠道常水位以上使用的装配式PET网袋箱生态护坡。为了探讨该方案的可行性,设计了4种试验工况,通过试验对比验证PET网袋箱生态护坡的性能。试验结果表明:使用PET网袋箱生态护坡的土体与原生态护坡相比,抗剪强度增强较多,尤其是土体的黏聚力比原生态护坡增强约110%,同时PET网袋箱生态护坡相较于混凝土、浆砌石、六棱砖护坡在滤土排水、便于施工、工程造价、生态环保等方面优势明显,可为类似生态护坡工程提供参考依据,以期助力黄河流域生态保护和高质量发展。

Ecological slope protection serves as the primary technique for promoting slope ecological restoration and reducing geological hazards. Based on ecological environmental theory and geological disaster prevention theory, we analyzed the adaptability of commonly used ecological slope protection types. We further integrated the solidifying, protective, permeable, filtration, and flexible advantages of various slope protection types aiming to address the current challenges faced by hard slope protection in the Kaifeng segment of irrigation channel diverted from the Yellow River. In consideration of the characteristics of sandy soil and the local conditions, we propose a method of ecological slope protection by using prefabricated PET net bag box suitable for areas above the normal water level in irrigation area. To assess the feasibility of this approach, we design four test conditions and conduct performance comparisons to verify the effectiveness of the PET mesh bag box for ecological slope protection. Test results demonstrate that the shear strength of the soil mass using the PET mesh bag box is significantly enhanced compared to the original ecological slope protection, particularly the cohesion of the soil mass, which is enhanced by approximately 110%. Additionally, the PET mesh bag box exhibits notable advantages in terms of soil drainage, construction convenience, engineering cost, and ecological environmental protection when compared to concrete, slurry masonry, and six-edge bricks. These findings provide valuable insights for similar projects and contribute to the ecological protection and high-quality development of the Yellow River basin.