植被砼技术在京港澳高速鸡公山段砾石土边坡上的应用

Application of Vegetation-Growing Concrete Technology in Gravel Side Slope in Jigong Mountain Section of Beijing-Hongkong and Macao High Speed

摘要: 鸡公山地区为国家4A级自然保护区，大量高填深挖方法建设的高速公路产生了许多裸露路基边坡，不仅破坏生态环境，还可能危及高速公路的安全。该课题实施对象为砾石土边坡，营养缺乏，不适合植被生长，雨季造成了水土流失，坡面产生一定程度的垮落和小冲沟，侵蚀明显。为保护高速公路的安全，恢复当地生态环境，通过系统对比研究，本课题利用植被砼技术对高速公路鸡公山区域某示范段裸露边坡实施植被防护。结果显示，通过合理调配植被砼中水泥含量、混播草种的比例以及营养成分等，采用适当的施工方法，在冬季施工的情况下，边坡植被恢复良好，护坡效果显著，极大提高了高速公路的安全性，对当地高速公路生态恢复起到很好的示范作用。

Abstract: Jigong Mountain area is the state-level AAAA nature reserve; the construction of highway by high filling and deep digging method produces many unstable bare slope, which result in not only the destruction of the ecological environment, but also the safety problem of the highway. The slope of the project is gravel; the soil nutrient deficiency is not suitable for vegetation growth; the rainfalls cause obvious soil erosion, and a certain degree of collapse and small gullies. For highway safety and restoring the local ecological environment through comparative study, this subject tried to build a restoration project of exposed slope using vegetation-growing concrete technology. The results show that slope protection effects have been greatly improved by adjusting the proportion of cement and mixed sowing grass species, and adopting proper construction methods in winter construction. It is a role model for local ecological restoration.