适用于三峡水库中陡土坡消落区等高种植的土工结构模型

目的]探讨在当前三峡库区面临的严峻生态环境下,采取何种适合的生态治理技术以解决库区生态环境安全问题,为三峡库区生态环境修复提供一定的参考依据。方法]通过生态治理模型整体框架结构,提高中、陡土坡生态系统地表基底稳定性;通过等高种植平面绿化技术、土工格室垂直绿化技术,提高消落区植被覆盖率和土壤肥力;通过不同高层区段消落区适宜植物"乔—灌—草—藤(177~170 m)、"灌—草—藤"(170~160m)、"草—藤"配置(160~145m),对消落区的生物多样性、植被覆盖率及景观层次起提高作用。结果]通过模型设计,将传统混凝土护坡技术与现代生态护坡技术相结合、等高种植平面绿化技术与土工格室垂直绿化技术相结合,实现了生物措施与工程措施的高度统一、系统稳定性与开放性的高度统一、植被覆盖率与景观层次的高度统一。结论]该土工结构模型的应用对三峡水库中陡土坡消落区生态治理具有一定的参考价值和现实的应用前景。

A Suitable Contour Planted Geotechnical Pattern for Middle and Steep Soil Slope in Water-level Fluctuation Zone of Three Gorges Reservoir

Objective] To find a kind of ecological management technology that can be adopted to solve the ecological problem existed in the Three Gorges reservoir area. Some appropriate ecological management technologies were researched to provide some reference for the restoration of ecological environment in the three gorges reservoir area.Methods] To improve the foundation stability in the middle and steep soil slope of ecosystem, measure of open circulation of the reinforced concrete frame was adopted. To strengthen the vegetation coverage and soil fertility in the water-level fluctuation zone, measure of contour planted areal greening and geo-cell planted vertical greening were conducted. To increase the biodiversity and landscape level in the water-level fluctuation zone, some suitable plant arrangements at different slope levels in the water-level fluctuation zone were carried out, including "tree-shrub-grass-vine" (177~170 m), "shrub-grass-vine" (170~160 m) and "grass-vine" (160~145 m).Results] The pattern helped to integrate the traditional concrete slope protection technology and modern ecological slope protection technology, and to integrate contour-planted areal greening and geo-cell planted vertical greening, is beneficial to gain high unity of biological measures and engineering measures, system stability and opening, vegetation coverage rate and landscape level.Conclusion] The application of this pattern has reference value and application perspective for the ecological management in water level fluctuation zone of the Three Gorges reservoir to some extent.