湿喷植被混凝土生态护坡技术在水渠边坡工程中的应用

目的]验证湿喷植被混凝土生态护坡技术的先进性与实用性,为工程边坡生态防护提供参考。方法]将湿喷植被混凝土生态护坡技术应用于湖北省鄂州市花马湖水系连通渠护坡工程,现场观测了护坡和水土保持效果、植物盖度、植株密度、植物平均高度以及物种多样性指标。结果]湿喷植被混凝土生态护坡技术能促使边坡稳定。所用基材能较好地附着于坡面,未出现冲沟和滑塌,水土保持较好,成功解决了基材可喷射性和坡面附着性之间的根本矛盾;1个月后坡面整体植被覆盖率达到90%以上;缓坡区的Shannon-Wiener多样性指数、Pielou均匀度指数、Simpson优势度指数与陡坡区均较为接近,但与自然边坡存在差异;湿喷综合成本比干喷节约5%～15%。结论]湿喷植被混凝土生态护坡技术作为干喷植被混凝土生态护坡技术的升级版,具备显著的先进性,能用于工程边坡的生态防护。

Application of Ecological Slope Protection Technology of Wet-Spraying Vegetation-Compatible Concrete in Channel Slope

Objective] The advancement and practicality of wet-spraying vegetation-compatible concrete (VCC) were studied to provide a reference for ecological protection of engineering slopes.Methods] The application of the new technology in the slope protection of a channel connected to Huama Lake in Ezhou City, Hubei Province, was presented. The effects of slope protection and soil and water conservation were observed. Furthermore, the plant coverage, plant density, average plant height, and species diversity index were tested on site.Results] The technology could keep the slopes remained stable. The VCC substrate could adhere well to the slope surface, without forming gullies and slumps, with good soil and water conservation. The fundamental contradiction between the spraying of the VCC substrate and its adhesion to the slope surface was successfully solved. One month after the construction, the overall vegetation coverage of the slope reached more than 90%. The Shannon-Wiener diversity index, the Pielou evenness index, and the Simpson dominance index of the vegetation in the gentle-slope area were similar to those in the steep-slope area, but there were differences from the natural slope. The overall cost of the new technology (wet-spraying version) was 5%~15% lower than that of the old one (dry-spraying version).Conclusion] As an upgraded version of dry-spraying VCC, this new technology shows significant advancements and can be used for ecological protection of engineering slopes.