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| Two technologies of concrete frame ecological slope protection and application effect: Taking the Anhui Yuewu highway as an example |
| Yang Yang1,Yang Jianying1,Zhao Ping2, Shi Changqing1, Xu Zening3, Zhou Feng4 |
| 1. School of Soil and Water Conservation, Beijing Forest University, 100083, Beijing, China; 2. Orient Landscape Limited Company, 100012,Beijing, China; 3. Anhui Provincial Expressway Holding Group Co. Ltd. , 230000, Hefei, China; 4. Beijing Shengxinjiahua Environmental Protection Technology Co. , Ltd. , 100070, Beijing, China |
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Abstract To investigate the more appropriate ecological slope protection technology for the highway slope in mountain area, we systematically introduced the characteristics and construction process of the two compound frame technology systems at the Yuewu Highway slope experimental area in Anhui Province. Two technologies, i. e. , the concrete frame compound vegetation carpet and concrete frame compound
vegetative bag were selected for ecological slope protection. The two methods were used as vegetation restoration measures for investigating and comparing the plant growth, soil properties and soil conservation effect. Results showed that six months after the construction, the complex indexes including shrub survival rate, height, base stems, canopy breadth and coverage were better in the area using the concrete frame compound vegetation carpet technology than the area using concrete frame compound vegetative bag technology. The concrete frame compound vegetation carpet technology had a more significant effect in soil improvement and control of soil erosion than the concrete frame compound vegetative bag technology.The soil porosity increased by 3.78%; soil total N, P and K increased by 0.51 mg/kg, 5.59 mg/ kg and 8.79 mg/ kg, respectively; the organic matter increased by 9.06 mg/ kg, the thickness of soil erosion and the amount of soil erosion decreased by 1.7 mm and 2 379.2 t/ km2, respectively. Comparing the economic costs of the two technologies in our project, the technology of concrete frame compound vegetation carpet had higher efficiency in construction, lower vegetation planting and maintenance cost, and shorter maintenance period. Through comparing the application effect of two technologies, it is not hard to conclude that the concrete frame compound vegetation carpet technology is more suitable to be promoted and applied in the mountain highway slope restoration, and it provides guide in the ecological slope protection for the highway slopes in the future.
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Received: 26 January 2015
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