高寒高海拔地区岩质陡边坡JYC生态基材护坡技术  

PROTECTION TECHNIQUES OF STEEP ROCK SLOPE WITH JYC ECOLOGICAL BASE MATERIALS IN HIGH-COLD AND HIGH-ALTITUDE AREA

作　　者：李天斌[1] 徐华[1] 周雄华[1,2] 张如柏[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川高速公路建设开发总公司,四川成都610041

出　　处：《岩石力学与工程学报》2008年第11期2332-2339,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：针对川西高寒高海拔地区的气候特征和生态环境,提出川西高寒地区生态护坡的植被配置模式;通过一系列室内外试验,成功地研发一种适宜于高寒地区岩质陡边坡植被恢复的新型JYC生态基材;利用正交试验,研究生态基材的组分构成和配比,并重点分析生态基材各组分与草种生长的耦合关系。3年多的现场护坡试验表明:JYC生态基材具有良好的黏结性能,与锚杆、铁丝网和植物根系组成复合的生态–工程结构,并与岩质陡边坡形成一个有机整体,确保基材自身和边坡浅表层的稳定。经过反复的雨水冲刷和严寒考验,基材流失量极少、无垮塌现象,证明JYC生态基材具有较好的耐旱抗冻性和抗侵蚀性。现场取样测试表明:JYC生态基材的养分含量较高,全氮含量大于0.2%、有效磷含量大于20 mg/kg、有效钾含量大于200 mg/kg,有机质含量大于5%,属于肥力较强的基质,能够持续提供给植物生长10 a以上的养分。掺入高分子材料和磁性肥料的JYC生态基材护坡技术比喷锚支护、喷混植生等边坡防护方法更加环保、经济,是高寒高海拔地区岩质陡边坡植被防护技术发展的方向。According to the climate characteristics and the ecological environment in high-cold and high-altitude area of the West Sichuan Province in China, the local vegetation configuration pattern in the ecological slope protection has been proposed. Through a series of indoor and outdoor experiments, a new-type ecological base material of JYC is developed successfully. By indoor mixture ratio orthogonal test, the components of ecological material and its proportion have been studied, especially the coupling relation between its various characters and plant growth is analyzed. The in-situ experiment of ecological slope protection in more than three years has shown that the JYC has good performance of cohesion, and the ecological engineering structure composed of the base material, anchors, wire netting and plant roots makes the base material and the shallow layer of steep rock slope stable. Through the repeated rainfall erosion and the severe cold weather, it is proven that the JYC is able to bear and resist drought, freezing and corrosion. And the long-term spot sampling tests show that the new-type ecological base material of JYC contains rich nutrient content, the total nitrogen of JYC is more than 0.2%, effective phosphorus more than 20 mg/kg, effective potassium more than 200 mg/kg, and organism more than 5%, which can offer the nutrient for more than 10 years to the plant growth. The slope protection technology of ecological base material of JYC is more suitable for environmental protection and economical benefit than those of shotcrete-bolt support and grass planting by spraying concrete. The method of ecological base material slope protection embedded in macromolecule materials and magnetic manure is the development direction of slope vegetation protection technology for steep rock slope in the high cold and high altitude area.

关 键 词：边坡工程 高寒高海拔地区 岩质陡边坡 生态护坡 生态基材 取样测试 

分 类 号：P642.22[天文地球—工程地质学]