土质岸坡生态防治技术研究

Study on Ecological Controlling Techniques for Soil Bank Slope of Channel

针对航道岸坡失稳的普遍问题及绿色航道建设要求,分析了生态护岸机理,阐述了适合内河航道土质岸坡的绿色生态治理理论及航道生态护岸构建技术.兼顾生物栖息地的改善需求,提出了石笼生态挡墙、生态袋柔性护岸及土工格室护岸3种生态护岸技术.以丹金溧漕河典型航道为依托工程,研发出2种复合型土质岸坡防治技术.研究护坡固土植物栽培及生物栖息地恢复技术与生态护岸结构的有机结合,构建出岸坡结构稳定、透水透气和生物多样性的绿色生态恢复技术,并采用商业软件对其变形稳定性进行评价.结果表明,提出的2种生态航道护岸设计方案均满足地基及岸坡稳定性要求,由于采用了柔性护岸结构形式,岸坡变形具有很大的自适应;同时该设计具有生态环保、景观宜人、造价低廉等诸多优点.

According to the problems of bank slope instability and the construction request of green channel, this article analyzes mechanism of ecological bank-protecting, elaborates green ecological governance theories of soil bank slope and construction technology of ecological bank-protecting for inland waterway. In view of ec- ological habitat improvement demands, this article put forwards three ecological revetment technologies, inclu- ding the ecological retaining wall of stone cage, flexible bank revetment of ecological bag and geo-cell embank- ment. Based on typical channel project of Dan Jin Li Cao river, two kinds of composite ecological bank-protec- ting technologies for soil bank slope are developed. Based on study of organic combination of vegetation culti- vation, biological habitat restoration technology and ecological slope protection structure, the green ecological recovery technology is built, with the features of stable structure, water permeability and air permeability and biological diversity. By using commercial software, its deformation stability has been evaluated. The results show that the two kinds of ecological bank-protecting design scheme can meet the stability requirements of foundation and bank slope, and due to the adoption of flexible bank prevention structure, the design has many advantages, such as great adaptive deformation of bank slope, ecological environmental protection, pleasant landscape, low cost etc